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Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
Document and Entity Information - USD ($) $ in Thousands	Dec. 31, 2017	Mar. 13, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Veritex Holdings, Inc.
Entity Central Index Key	0001501570
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 350,195
Entity Common Stock, Shares Outstanding		24,134,748
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 38,243	$ 15,631
Interest bearing deposits in other banks	110,801	219,160
Total cash and cash equivalents	149,044	234,791
Investment securities	228,117	102,559
Loans held for sale	841	5,208
Loans, net of allowance for loan losses of $12,808 and $8,524, respectively	2,220,682	983,318
Accrued interest receivable	7,676	2,907
Bank-owned life insurance	21,476	20,077
Bank premises, furniture and equipment, net	75,251	17,413
Non-marketable equity securities	13,732	7,366
Investment in unconsolidated subsidiary	352	93
Other real estate owned	449	662
Intangible assets, net of accumulated amortization of $3,468 and $2,198, respectively	20,441	2,181
Goodwill	159,452	26,865
Other assets	14,518	5,067
Branch assets held for sale	33,552	0
Total assets	2,945,583	1,408,507
Deposits:
Noninterest-bearing	612,830	327,614
Interest-bearing	1,665,800	792,016
Total deposits	2,278,630	1,119,630
Accounts payable and accrued expenses	5,098	2,914
Accrued interest payable and other liabilities	5,446	534
Advances from Federal Home Loan Bank	71,164	38,306
Junior subordinated debentures	11,702	3,093
Subordinated notes	4,987	4,942
Other borrowings	15,000	0
Branch liabilities held for sale	64,627	0
Total liabilities	2,456,654	1,169,419
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $0.01 par value; 10,000,000 shares authorized at December 31, 2017 and December 31, 2016, no shares issued and outstanding	0	0
Common stock, $0.01 par value; 75,000,000 shares authorized at December 31, 2017 and December 31, 2016; 24,109,515 and 15,195,328 shares issued and outstanding at December 31, 2017 and December 31, 2016, (excluding 10,000 shares held in treasury)	241	152
Additional paid-in capital	445,517	211,173
Retained earnings	44,627	29,290
Unallocated Employee Stock Ownership Plan shares; 9,771 and 18,783 shares at December 31, 2017 and 2016, respectively	(106)	(209)
Accumulated other comprehensive loss	(1,280)	(1,248)
Treasury stock, 10,000 shares at cost	(70)	(70)
Total stockholders’ equity	488,929	239,088
Total liabilities and stockholders’ equity	$ 2,945,583	$ 1,408,507

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 12,808	$ 8,524
Accumulated amortization	$ 3,468	$ 2,198
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	24,109,515	15,195,328
Common stock, shares outstanding (in shares)	24,109,515	15,195,328
Unallocated Employee Stock Ownership Plan shares (in shares)	9,771	18,783
Treasury stock, shares (in shares)	10,000	10,000

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest income:
Interest and fees on loans	$ 73,795	$ 44,681	$ 33,680
Interest on investment securities	3,462	1,409	997
Interest on deposits in other banks	2,287	503	241
Interest on other	8	2	2
Total interest income	79,552	46,595	34,920
Interest expense:
Interest on deposit accounts	9,878	4,988	2,918
Interest on borrowings	1,166	652	543
Total interest expense	11,044	5,640	3,461
Net interest income	68,508	40,955	31,459
Provision for loan losses	5,114	2,050	868
Net interest income after provision for loan losses	63,394	38,905	30,591
Noninterest income:
Service charges and fees on deposit accounts	2,502	1,846	1,326
Gain on sales of investment securities	222	15	7
Gain on sales of loans and other assets owned	3,141	3,288	1,273
Bank-owned life insurance	753	771	747
Other	958	583	351
Total noninterest income	7,576	6,503	3,704
Noninterest expense:
Salaries and employee benefits	20,828	14,332	11,265
Occupancy and equipment	5,618	3,667	3,477
Professional fees	5,672	2,804	2,023
Data processing and software expense	2,217	1,158	1,216
FDIC assessment fees	1,177	661	448
Marketing	1,293	983	799
Other assets owned expenses and write-downs	182	163	53
Amortization of intangibles	964	380	338
Telephone and communications	720	402	263
Other	4,118	1,840	1,506
Total noninterest expense	42,789	26,390	21,388
Net income from operations	28,181	19,018	12,907
Income tax expense	13,029	6,467	4,117
Net income	15,152	12,551	8,790
Preferred stock dividends	42	0	98
Net income allocated to common stockholders	$ 15,110	$ 12,551	$ 8,692
Basic earnings per share (in dollars per share)	$ 0.82	$ 1.16	$ 0.86
Diluted earnings per share (in dollars per share)	$ 0.80	$ 1.13	$ 0.84

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 15,152	$ 12,551	$ 8,790
Other comprehensive income (loss):
Unrealized gains (losses) on securities available for sale arising during the period, net	493	(1,661)	(469)
Reclassification adjustment for net gains included in net income	222	15	7
Other comprehensive income (losses) before tax	271	(1,676)	(476)
Income tax expense (benefit)	76	(570)	(162)
Other comprehensive income (loss), net of tax	195	(1,106)	(314)
Comprehensive income	$ 15,347	$ 11,445	$ 8,476

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Unallocated Employee Stock Ownership Plan Shares	Treasury Stock	Sovereign Bank	Sovereign Bank Common Stock	Sovereign Bank Additional Paid-In Capital	Liberty acquisition	Liberty acquisition Common Stock	Liberty acquisition Additional Paid-In Capital
Stockholders' equity, beginning balance at Dec. 31, 2014	$ 113,312	$ 8,000	$ 95	$ 97,469	$ 8,047	$ 172	$ (401)	$ (70)
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2014			9,470,832
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net (in shares)			26,426
Restricted stock units vested, net	(159)			(159)
Exercise of employee stock options (in shares)			21,000
Exercise of employee stock options	210			210
Preferred stock dividends	(98)				(98)
Redemption of preferred stock	(8,000)	(8,000)
Issuance of stock to ESOP (in shares)			9,147
Issuance of stock to ESOP	110			115			(5)
ESOP Shares Allocated	$ 109			12			97
Common stock issued in acquisitions (in shares)	1,185,067		1,185,067
Stock issued in acquisitions, net of offering costs, value	$ 17,453		$ 12	17,441
Stock based compensation	633			633
Net income	8,790				8,790
Other comprehensive income (loss)	(314)					(314)
Stockholders' equity, ending balance at Dec. 31, 2015	132,046	0	$ 107	115,721	16,739	(142)	(309)	(70)
Stockholders' equity, ending balance (in shares) at Dec. 31, 2015			10,712,472
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net (in shares)			38,106
Restricted stock units vested, net	(175)			(175)
Issuance of stock to ESOP	0
ESOP Shares Allocated	109			9			100
Common stock issued in acquisitions (in shares)			4,444,750
Stock issued in acquisitions, net of offering costs, value	94,518		$ 45	94,473
Stock based compensation	983			983
Excess tax benefit from stock compensation	162			162
Net income	12,551				12,551
Other comprehensive income (loss)	(1,106)					(1,106)
Stockholders' equity, ending balance at Dec. 31, 2016	$ 239,088	0	$ 152	211,173	29,290	(1,248)	(209)	(70)
Stockholders' equity, ending balance (in shares) at Dec. 31, 2016	15,195,328		15,195,328
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net (in shares)			43,602
Restricted stock units vested, net	$ (312)			(312)
Exercise of employee stock options (in shares)			17,949
Exercise of employee stock options	169			169
Preferred stock dividends	(42)				(42)
Redemption of preferred stock	(49,000)	(24,500)		(24,500)
Issuance of stock to ESOP	0
ESOP Shares Allocated	109			6			103
Common stock issued in acquisitions (in shares)										5,117,642			1,449,944
Stock issued in acquisitions, net of offering costs, value									$ 135,947	$ 51	$ 135,896	$ 40,003	$ 14	$ 39,989
Stock based compensation	1,939			1,939
Sale of common stock in public offering, net of offering costs of $288 (in shares)			2,285,050
Sale of common stock in public offering, net of offering costs of $288	56,681		$ 24	56,657
Issuance of preferred stock, series D in connection with the acquisition of Sovereign Bancshares, Inc.	49,000	24,500		24,500
Net income	15,152				15,152
Reclassification of certain deferred tax effects	0				227	(227)
Other comprehensive income (loss)	195					195
Stockholders' equity, ending balance at Dec. 31, 2017	$ 488,929	$ 0	$ 241	$ 445,517	$ 44,627	$ (1,280)	$ (106)	$ (70)
Stockholders' equity, ending balance (in shares) at Dec. 31, 2017	24,109,515		24,109,515

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Offering costs		$ 489	$ 252
Shares withheld to cover tax withholdings (in shares)	11,601	10,384	10,025
Sovereign Bancshares, Inc.
Offering costs	$ 438
Liberty Bancshares, Inc.
Offering costs	334
Public Offering
Offering costs	$ 288

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 15,152	$ 12,551	$ 8,790
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,836	1,704	1,418
Provision for loan losses	5,114	2,050	868
Accretion of loan purchase discount	(3,783)	(425)	(194)
Stock-based compensation expense	1,939	983	633
Excess tax benefit from stock compensation	(268)	(162)	0
Deferred tax expense (benefit)	5,143	(1,366)	(375)
Net amortization of premiums on investment securities	1,771	1,025	498
Change in cash surrender value of bank-owned life insurance	(589)	(618)	(613)
Net gain on sales of investment securities	(222)	(15)	(7)
Gain on sales of loans held for sale	(942)	(3,288)	(1,254)
Gain on sales of SBA loans	(1,940)	0	0
Net gain on sales of other real estate owned	(259)	0	(19)
Amortization of subordinated note discount and debt issuance costs	45	8	2
Net originations of loans held for sale	(48,567)	(70,773)	(39,614)
Proceeds from sale of loans held for sale	53,876	69,801	46,344
Write down on real estate owned	37	114	0
Decrease (increase) in accrued interest receivable and other assets	(1,204)	(1,728)	(342)
(Decrease) increase in accounts payable, accrued expenses, accrued interest payable and other liabilities	(1,477)	999	72
Net cash provided by operating activities	26,662	10,860	16,207
Cash flows from investing activities:
Purchases of securities available for sale	(839,963)	(357,187)	(344,813)
Sales of securities available for sale	159,869	8,378	3,779
Proceeds from maturities, calls and pay downs of investment securities	773,702	319,377	314,029
Sales (purchases) of non-marketable equity securities, net	2,481	(3,199)	762
Net loans originated	(229,402)	(190,184)	(135,977)
Proceeds from sale of SBA loans	30,355	20,574	7,365
Net additions to bank premises and equipment	(40,571)	(1,075)	(2,392)
Net intangible assets and lease obligations related to the purchase of our corporate building	(4,181)	0	0
Proceeds from sales of other real estate owned	1,920	0	124
Net cash used in investing activities	(124,855)	(203,316)	(145,973)
Cash flows from financing activities:
Net change in deposits	18,065	251,220	132,241
Net (decrease) increase in advances from Federal Home Loan Bank	(47,142)	9,862	(15,059)
Net proceeds from sale of common stock in public offering	56,681	94,518	0
Net change in other borrowings	10,375	0	(926)
Redemption of preferred stock	(24,500)	0	(8,000)
Dividends paid on preferred stock	(227)	0	(98)
Proceeds from exercise of employee stock options	175	0	210
Payments to tax authorities for stock-based compensation	(318)	(175)	(159)
Excess tax benefit from stock compensation	0	162	0
Proceeds from payments on ESOP Loan	109	109	109
Offering costs paid in connection with acquisitions	(772)	0	(252)
Net cash provided by financing activities	12,446	355,696	108,066
Net (decrease) increase in cash and cash equivalents	(85,747)	163,240	(21,700)
Cash and cash equivalents at beginning of year	234,791	71,551	93,251
Cash and cash equivalents at end of year	149,044	234,791	71,551
Sovereign Bancshares, Inc.
Cash flows from investing activities:
Cash paid in excess of cash received for the acquisition of Sovereign Bancshares, Inc.	(11,440)	0	0
Liberty Bancshares, Inc.
Cash flows from investing activities:
Cash paid in excess of cash received for the acquisition of Sovereign Bancshares, Inc.	32,375	0	0
IBT Bancorp
Cash flows from investing activities:
Cash paid in excess of cash received for the acquisition of Sovereign Bancshares, Inc.	$ 0	$ 0	$ 11,150

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Nature of Operations and Principles of Consolidated Financial Statements

The consolidated financial statements include Veritex Holdings, Inc. (“Veritex” or the “Company”), whose business at December 31, 2017 primarily consisted of the operations of its wholly owned subsidiary, Veritex Community Bank (the “Bank”).

The accounting principles followed by the Company and the methods of applying them are in conformity with U.S. generally accepted accounting principles (“GAAP”) and prevailing practices of the banking industry. Intercompany transactions and balances are eliminated in consolidation.

Veritex is a Texas state banking organization with corporate offices in Dallas, Texas, and currently operates twenty branches and one mortgage office located in the Dallas-Fort Worth metroplex and one branch in the Houston metropolitan area. The Bank provides a full range of banking services to individual and corporate customers, which include commercial and retail lending, and the acceptance of checking and savings deposits. The Texas Department of Banking and the Board of Governors of the Federal Reserve System are the primary regulators of the Company and the Bank, which perform periodic examinations to ensure regulatory compliance.

Accounting Standards Codification

The Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) is the officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative. Citing particular content in the ASC involves specifying the unique numeric path to the content through the Topic, Subtopic, Section and Paragraph structure.

Segment Reporting

The Company has one reportable segment. All of the Company’s activities are interrelated, and each activity is dependent and assessed based on how each of the activities of the Company supports the others. For example, lending is dependent upon the ability of the Company to fund itself with deposits and borrowings while managing the interest rate and credit risk. Accordingly, all significant operating decisions are based upon analysis of the Bank as one segment or unit. The Company’s chief operating decision-maker, the Chief Executive Officer, uses the consolidated results to make operating and strategic decisions.

Reclassifications

Effective January 1, 2017, the Company adopted ASU 2016-09. Per ASU 2016-09, cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity and for presentation purposes be applied retrospectively. We have retrospectively reclassified $175 and $159 of shares withheld for tax-withholding purposes from an operating activity to a financing activity in our consolidated statements of cash flows for December 31, 2016 and December 31, 2015, respectively.

The Company also early adopted ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (ASU 2018-02) in the fourth quarter 2017. ASU 2018-02, issued in February 2018, provides for the reclassification of the effect of remeasuring deferred tax balances related to items within accumulated other comprehensive income (“AOCI”) to retained earnings resulting from the Tax Cuts and Jobs Act (the “Tax Act”) of 2017. As a result, the Company reclassified $227 from AOCI to retained earnings.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair values of financial instruments, realization of deferred tax assets, and the status of contingencies are particularly subject to change.

Cash and Cash Equivalents

For the purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold.

The Bank maintains deposits with other financial institutions in amounts that exceed federal deposit insurance coverage. Furthermore, federal funds sold are essentially uncollateralized loans to other financial institutions. Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that the Company is not exposed to any significant credit risks on cash and cash equivalents.

Restrictions on Cash

The Bank is required to maintain regulatory reserve balances with the Federal Reserve Bank. The reserve balances required as of December 31, 2017 and 2016 were approximately $64.3 million and $26.4 million, respectively.

Investment Securities

Securities that the Company has both the positive intent and ability to hold to maturity are classified as held to maturity and are carried at amortized cost. Securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity, are classified as available for sale and are carried at fair value. Unrealized gains and losses on securities classified as available for sale have been accounted for as accumulated other comprehensive income (loss), net of taxes. Management determines the appropriate classification of securities at the time of purchase.

Interest income includes amortization of purchase premiums and discounts. Realized gains and losses are derived from the amortized cost of the security sold. Credit related declines in the fair value of available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses, with the remaining unrealized loss recognized as a component of other comprehensive income. In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. For the years ended December 31, 2017, 2016 and 2015 there were no other-than-temporary impairment losses reflected in earnings as realized losses.

Loans Held for Sale

Loans held for sale consist of certain mortgage loans originated and intended for sale in the secondary market and are carried at the lower of cost or estimated fair value on an individual loan basis. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. The Company obtains commitments to purchase the loans from the secondary market investors prior to closing of the loans. Loans held for sale are sold with servicing released. Gains and losses on sales of loans held for sale are based on the difference between the selling price and the carrying value of the related loan sold.

Loans and Allowance for Loan Losses

Loans, excluding certain purchased loans that have shown evidence of deterioration since origination as of the date of the acquisition, that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is recognized using the effective-interest method on the daily balances of the principal amounts outstanding. Fees associated with the origination of loans and certain direct loan origination costs are netted and the net amount is deferred and recognized over the life of the loan as an adjustment of yield.

The accrual of interest on loans is discontinued when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally no later than when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining book balance of the asset is deemed to be collectible. If collectability is questionable, then cash payments are applied to principal. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured in accordance with the terms of the loan agreement.

The allowance for loan losses is an estimated amount management believes is adequate to absorb inherent losses on existing loans that may be uncollectible based upon review and evaluation of the loan portfolio. Management’s periodic evaluation of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. The allowance for loan losses is comprised of two components: the general reserve and specific reserves. The general reserve is determined in accordance with current authoritative accounting guidance. The Company’s calculation of the general reserve considers historical loss rates for the last three years adjusted for qualitative factors based upon general economic conditions and other qualitative risk factors both internal and external to the Company. Such qualitative factors include current local economic conditions and trends including unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. These qualitative factors serve to compensate for additional areas of uncertainty inherent in the portfolio that are not reflected in the Company’s historic loss factors. For purposes of determining the general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and impaired loans, is multiplied by the Company’s adjusted historical loss rate. Specific reserves are determined in accordance with current authoritative accounting guidance based on probable losses on specific classified loans.

The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries).

Due to the growth of the Bank over the past several years, a portion of the loans in its portfolio and its lending relationships are of relatively recent origin. The new loan portfolios have limited delinquency and credit loss history and have not yet exhibited an observable loss trend. The credit quality of loans in theses loan portfolios are impacted by delinquency status and debt service coverage generated by the borrowers’ business and fluctuations in the value of real estate collateral. Management considers delinquency status to be the most meaningful indicator of the credit quality of one-to-four single family residential, home equity loans and lines of credit and other consumer loans. In general, loans do not begin to show signs of credit deterioration or default until they have been outstanding for some period of time, a process the Company refers to as “seasoning.” As a result, a portfolio of older loans will usually behave more predictably than a portfolio of newer loans. Because the majority of the portfolio is relatively new, the current level of delinquencies and defaults may not be representative of the level that will prevail when the portfolio becomes more seasoned, which may be higher than current levels.

Delinquency statistics are updated at least monthly. Internal risk ratings are considered the most meaningful indicator of credit quality for new commercial, construction, and commercial real estate loans. Internal risk ratings are a key factor in identifying loans that are individually evaluated for impairment and impact management’s estimates of loss factors used in determining the amount of the allowance for loan losses. Internal risk ratings are updated on a continuous basis.

Loans are considered impaired when, based on current information and events, it is probable the Company will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific valuation allowance is recorded, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

The Company’s policy requires measurement of the allowance for an impaired collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At December 31, 2017 and 2016, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. All troubled debt restructurings are considered impaired loans. The Company reviews each troubled debt restructured loan and determines on a case by case basis if a specific valuation allowance is required. A specific valuation allowance is based on either the present value of estimated future cash flows or the estimated fair value of the underlying collateral.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives frequent reports related to loan originations, quality, concentrations, delinquencies, non-performing and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geography.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory, and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location, throughout the Dallas-Fort Worth metroplex and Houston metropolitan area. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry.

The Company utilizes methodical credit standards and analysis to supplement its policies and procedures in underwriting consumer loans. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimizes the Company’s risk.

Certain Acquired Loans

As part of business acquisitions, the Company evaluated each of the acquired loans under ASC 310-30 to determine whether (i) there was evidence of credit deterioration since origination, and (ii) it was probable that the Company would not collect all contractually required payments receivable. The Company determined the best indicator of such evidence was an individual loan’s payment status and/or whether a loan was determined to be classified based on a review of each individual loan. Therefore, generally each individual loan that should have been or was on non-accrual at the acquisition date and each individual loan that was deemed impaired were included subject to ASC 310-30 accounting. These loans were recorded at the discounted expected cash flows of the individual loan.

Loans which were evaluated under ASC 310-30, and where the timing and amount of cash flows can be reasonably estimated, were accounted for in accordance with ASC 310-30-35. The Company applies the interest method for these loans under this subtopic and the loans are excluded from non-accrual. If, at acquisition, the Company identified loans that they could not reasonably estimate cash flows or, if subsequent to acquisition, such cash flows could not be estimated, such loans would be included in non-accrual and accounted for under the cost recovery method. These acquired loans are recorded at the allocated fair value, such that there is no carryover of the seller’s allowance for loan losses. Such acquired loans are accounted for individually. The Company estimates the amount and timing of expected cash flows for each purchased loan, and the expected cash flows in excess of the allocated fair value is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s contractual principal and interest over expected cash flows is not recorded (non-accretable difference). Over the life of the loan, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded through the allowance for loan losses. If the present value of expected cash flows is greater than the carrying amount, any related allowance for loan loss is reversed, with the remaining yield being recognized prospectively through interest income. Accretion of purchase discounts on PCI loans is based on estimated future cash flows, regardless of contractual maturities, that include undiscounted expected principal and interest payments and use credit risk, interest rate and prepayment risk models to incorporate management’s best estimate of current key assumptions such as default rates, loss severity and payment speeds. Accretion of purchase discounts on acquired non-impaired loans is recognized on a level-yield basis based on contractual maturity of individual loans per ASC 310-20.

Loans to which ASC 310-30 accounting is applied are deemed purchased credit impaired (“PCI”) loans. Revolving loans, including lines of credit, are excluded from PCI loan accounting.

For acquired loans not deemed to be PCI loans at acquisition, the differences between the initial fair value and the unpaid principal balance are recognized as interest income on a level-yield basis over the lives of the related loans. Subsequent to the acquisition date, methods utilized to estimate the required allowance for loan losses for these loans is similar to originated loans; however, a provision for loan losses will be recorded only to the extent the required allowance exceeds any remaining purchase discounts.

Transfers of Financial Assets

Transfers of financial assets (generally consisting of sales of loans held for sale and loan participations with unaffiliated banks) are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.

Bank Premises and Equipment

Buildings and improvements, furniture and equipment are carried at cost less accumulated depreciation computed using the straight-line method over the estimated useful lives of the respective assets as follows:



Buildings and improvements	10 - 40 years
Site improvements	15 years
Tenant improvements	Lease term
Leasehold improvements	Lease term
Furniture and equipment	3 - 10 years

Major replacements and betterments are capitalized while maintenance and repairs are charged to expense when incurred. Gains or losses on dispositions are reflected in the consolidated statements of income as incurred.

Non-Marketable Equity Securities

The Bank is a member of its regional Federal Reserve Bank (“FRB”) and of the Federal Home Loan Bank system (“FHLB”). FHLB members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. Both FRB and FHLB stock are carried at cost, restricted for sale, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. Other non-marketable equity securities are carried at cost which approximates fair value.

Other Real Estate Owned

Other real estate owned represents properties acquired through or in lieu of loan foreclosure and are initially recorded at fair value less estimated costs to sell. At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Bank’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. If fair value declines subsequent to foreclosure, a valuation allowance is recorded through expense. Operating costs after acquisition are expensed.

Bank-Owned Life Insurance

The Company has purchased life insurance policies on certain employees. These bank-owned life insurance (“BOLI”) policies are recorded in the accompanying consolidated balance sheets at their cash surrender values. Income from these policies and changes in the cash surrender values are recorded in noninterest income in the accompanying consolidated statements of income.

Goodwill and Intangible Assets

Goodwill resulting from a business combination represents the excess of the fair value of the consideration transferred over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill is not amortized but is reviewed for potential impairment annually on December 31 or when a triggering event occurs. The Company’s goodwill test involves a two-step process. Under the first step, the estimation of fair value of the reporting unit is compared to its carrying value including goodwill. If step one indicates a potential impairment, the second step is performed to measure the amount of impairment, if any. If the carrying amount of the reporting goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. Any such adjustments are reflected in the results of operations in the periods in which they become known. Intangible assets consist of core deposit intangibles, intangible assets related to operating leases with favorable market terms acquired in business combinations, and in-place lease intangibles associated with the purchase of our corporate office.

Intangible assets are initially recognized based on a valuation performed as of the acquisition date and are amortized on a straight-line basis over their estimated useful lives of the respective intangible asset as follows::



Core deposit intangible	7 - 10 years
Operating lease intangible	Lease term
In-place lease intangible	Lease term

All indefinite lived intangible assets are tested annually for potential impairment or when triggering events occur. Intangible assets with definite lives are tested for impairment when a triggering event occurs. No impairment charges related to goodwill and intangible assets were recorded during the years ended December 31, 2017, 2016 and 2015.

Servicing Assets

The Company accounts for its servicing assets at amortized cost in accordance with ASC 860, “Servicing Assets and Liabilities.” The codification requires that servicing rights acquired through the origination of loans, which are sold with servicing rights retained, are recognized as separate assets. Servicing assets are recorded as the difference between the contractual servicing fees and adequate compensation for performing the servicing, and are periodically reviewed and adjusted for any impairment. The amount of impairment recognized, if any, is the amount by which the servicing assets exceed their fair value. Fair value of the servicing assets is estimated using discounted cash flows based on current market interest rates. Servicing rights are amortized over their estimated lives.

Branch Assets and Liabilities Held for Sale

The Company reports long-lived assets including other assets and liabilities as part of a disposal group as held for sale when management has approved or received approval to sell the assets and liabilities, the Company is committed to a formal plan, the assets and liabilities are available for immediate sale, the assets and liabilities are being actively marketed, the sale is anticipated to occur during the next 12 months and certain other specific criteria are met. Assets and liabilities held for sale are recorded at the lower of its carrying amount or estimated fair value less costs to sell. If the carrying amount of the assets and liabilities exceeds its estimated fair value, a loss is recognized. Depreciation and amortization expense is not recorded on the assets held for sale after it is classified as held for sale.

Marketing Expense

The Company expenses all marketing costs as they are incurred. Marketing expenses were $1,293, $983 and $799 in 2017, 2016 and 2015, respectively.

Income Taxes

The Company files a consolidated income tax return with its subsidiary. Federal income tax expense or benefit is allocated on a separate return basis.

The Company accounts for income taxes using the asset and liability approach for financial accounting and reporting. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years.

The Tax Cuts and Jobs Act (the "Tax Act"), enacted on December 22, 2017, reduced the U.S. federal corporate tax rate from 35% to 21%. On December 23, 2017, the Securities and Exchange Commission’s Office of the Chief Accountant ("SEC staff") issued SAB 118, which expresses the views of the SEC staff regarding the application of the FASB ASC Topic 740 (Income Taxes), in the reporting period that includes December 22, 2017, the date on which the Tax Act was signed into law. SAB 118 provides guidance for registrants under three scenarios: (1) When measurement of certain income tax effects is complete. Registrants must reflect the tax effects of the Tax Act for which the accounting is complete; (2) When measurement of certain income tax effects can be reasonably estimated. Registrants must report provisional amounts for those specific income tax effects of the Tax Act for which the accounting is incomplete but a reasonable estimate can be determined. Provisional amounts or adjustments to provisional amounts identified in the measurement period, as defined, should be included as an adjustment to tax expense or benefit from continuing operations in the period the amounts are determined; and (3) When measurement of certain income tax effects cannot be reasonably estimated. Registrants are not required to report provisional amounts for any specific income tax effects of the Tax Act for which a reasonable estimate cannot be determined, and would continue to apply ASC Topic 740 based on the provisions of the tax laws that were in effect immediately prior to the enactment of the Tax Act. Registrants would report the provisional amounts of the tax effects of the Tax Act in the first reporting period in which a reasonable estimate can be determined. SAB 118 further provides that the measurement period is complete when a company's accounting is complete and in no circumstances should the measurement period extend beyond one year from the enactment date. A registrant may be able to complete the accounting for some provisions earlier than others. As a result, it may need to apply all three scenarios in determining the accounting for the Tax Act based on the information that is available. The ultimate impact of the Tax Act on our consolidated financial statements and related disclosures for 2017 and beyond may differ from our current estimates, possibly materially, due to, among other things, changes in interpretations and assumptions we have made, guidance that may be issued, and other actions we may take as a result of the Tax Act that differ from those presently contemplated. Based on the information available and current interpretation of the rules, the Company has made reasonable estimates of the impact of the reduction in the corporate tax rate and re-measurement of certain deferred tax assets and liabilities based on the rate at which they are expected to reverse in the future, generally 21 percent. The Company is still analyzing certain provisional estimates for the Liberty and Sovereign acquisitions with respect to loans, bank premises, furniture and equipment, goodwill, intangible assets, deposits and deferred taxes. Any changes to these provisional estimates and re-measurement of deferred taxes could potentially have an impact on our future earnings and effective tax rate. The provisional amount recorded related to the re-measurement of the Corporation's deferred tax balance was $3,051 for the year ended December 31, 2017.

The Company may recognize the tax benefit of an uncertain tax position only if it is more likely than not that the tax position will be sustained upon examination by the taxing authorities based on the technical merits of the position. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements would be the benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. For the years ended December 31, 2017 and 2016, management has determined there are no material uncertain tax positions.

When necessary, the Company would include interest assessed by taxing authorities in “Interest expense” and penalties related to income taxes in “Other expense” on its consolidated statements of income. The Company did not record any interest or penalties related to income tax for the years ended December 31, 2017, 2016, and 2015. With few exceptions, such as state examinations, the Company is no longer subject to U.S. federal income tax examinations by tax authorities for the years before 2014.

Fair Values of Financial Instruments

Fair values of financial instruments are estimated using relevant market information and other assumptions. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates. The fair value estimates of existing on and off-balance sheet financial instruments do not include the value of anticipated future business or the value of assets and liabilities not considered financial instruments.

Stock Based Compensation

Compensation cost is recognized for stock options and stock awards (performance and non-performance based) issued to employees and directors, based on the fair value of these awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options. The market price of the Company’s common stock at the date of grant is used to estimate fair value for stock awards. A Monte Carlo simulation is used to estimate the fair value of performance-based restricted stock units which include a market condition that determines the number of restricted stock units which will vest based on the Company’s total shareholder return relative to a market index.

Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.

Treasury Stock

Treasury stock is stated at cost, which is determined by the first-in, first-out method.

Comprehensive Income

Comprehensive income includes all changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. In addition to net income, comprehensive income includes the net effect of changes in the fair value of securities available for sale, net of tax. Comprehensive income is reported in the accompanying consolidated statements of comprehensive income.

Employee Stock Ownership Plan

Effective January 1, 2012, the Company adopted the Veritex Community Bank Employee Stock Ownership Plan (“ESOP”) covering all employees that meet certain age and service requirements. Plan assets are held and managed by the Company. Shares of the Company’s common stock purchased by the ESOP are held in a suspense account until released for allocation to participants. Shares released are allocated to each eligible participant based on the participant’s 401(k) contribution made during that year. Compensation expense is measured based upon the expected amount of the Company’s discretionary contribution that is determined on an annual basis and is accrued ratably over the year. Shares are committed to be released to settle the liability upon formal declaration of the contribution at the end of the year. The number of shares released to settle the liability is based upon fair value of the shares and become outstanding shares for earnings per share computations. The cost of shares issued to the ESOP, but not yet committed to be released, is shown as a reduction of stockholders’ equity. To the extent that the fair value of the ESOP shares differs from the cost of such shares, the difference is charged or credited to stockholders’ equity as additional paid in capital.

Business Combinations

The Company applies the acquisition method of accounting for business combinations. Under the acquisition method, the acquiring entity in a business combination recognizes 100% of the assets acquired and liabilities assumed at their acquisition date fair values. Management utilizes valuation techniques appropriate for the asset or liability being measured in determining these fair values. Any excess of the purchase price over amounts allocated to assets acquired, including identifiable intangible assets, and liabilities assumed is recorded as goodwill. Where amounts allocated to assets acquired and liabilities assumed is greater than the purchase price, a bargain purchase gain is recognized. Acquisition-related costs are expensed as incurred.

Earnings Per Share

Earnings per share (“EPS”) are based upon the weighted-average shares outstanding. The table below sets forth the reconciliation between weighted average shares used for calculating basic and diluted EPS for the years ended December 31, 2017, 2016 and 2015.



	Year Ended December 31,
	2017		2016		2015
Earnings (numerator)
Net income	$	15,152	$	12,551	$	8,790
Less: preferred stock dividends	42		—		98
Net income allocated to common stockholders	$	15,110	$	12,551	$	8,692
Shares (denominator)
Weighted average shares outstanding for basic EPS (thousands)	18,404		10,849		10,061
Dilutive effect of employee stock-based awards	406		209		271
Adjusted weighted average shares outstanding	18,810		11,058		10,332
Earnings per share:
Basic	$	0.82	$	1.16	$	0.86
Diluted	$	0.80	$	1.13	$	0.84

For the years ended December 31, 2017, 2016 and 2015, there were no antidilutive shares excluded from the diluted EPS weighted average shares.

Supplemental Statement of Cash Flows

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Supplemental Statement of Cash Flows

Other supplemental cash flow information is presented below:



	Year Ended December 31,
	2017		2016		2015
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	10,680	$	5,607	$	3,520
Cash paid for income taxes	$	9,761	$	8,250	$	4,100
Supplemental Disclosures of Non-Cash Flow Information:
Issuance of stock to ESOP	$	—	$	—	$	110
Net issuance of common stock for vesting of restricted stock units	$	312	$	175	$	159
Net foreclosure of other real estate owned	$	1,037	$	283	$	493
Transfers to assets held for sale	$	33,552	$	—	$	—
Transfers to liabilities held for sale	$	64,627	$	—	$	—



	Year Ended December 31,
	2017		2016		2015
Noncash assets acquired
Investment securities	$	220,444	$	—	$	5,436
Loans	1,065,058		—		88,459
Accrued interest receivable	4,293		—		250
Bank premises, furniture and equipment	23,950		—		4,947
Non-marketable equity securities	8,847		—		—
Other real estate owned	448		—		—
Intangible assets	15,973		—		1,078
Goodwill	132,587		—		7,717
Other assets	15,657		—		1,347
Total assets	$	1,487,257	$	—	$	109,234
Noncash liabilities assumed:
Deposits	$	1,205,217	$	—	$	97,426
Accounts payable and accrued expenses⁽¹⁾	7,571		—
Accrued interest payable and other liabilities	948		—		824
Advances from FHLB	80,000				3,503
Other borrowings	13,234		—		926
Total liabilities	$	1,306,970	$	—	$	102,679
Non-cash equity assumed
Preferred stock - series D	$	24,500	$	—	$	—
Total equity assumed	$	24,500	$	—	$	—
5,117,642 shares of common stock exchanged in connection with the Sovereign acquisition	$	136,385	$	—	$	—
1,449,944 shares of common stock exchanged in connection with the Liberty acquisition	$	40,337	$	—
1,185,067 shares of common stock exchanged in connection with the IBT acquisition	$	—	$	—	$	17,705

⁽¹⁾ Accounts payable and accrued expenses includes accrued preferred stock dividends of $185.

Recent Accounting Pronouncements	12 Months Ended
Recent Accounting Pronouncements	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (“ASU 2018-02”), issued in February 2018, provides for the reclassification of the effect of remeasuring deferred tax balances related to items within AOCI to retained earnings resulting from the Tax Act. The Company early adopted ASU No. 2018-02 in the fourth quarter of 2017. As a result, the Company reclassified $227 from AOCI to retained earnings. ASU 2017-04 “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”) eliminates Step 2 from the goodwill impairment test. In addition, the amendment eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. For public companies, ASU 2017-04 is effective for fiscal years beginning after December 15, 2019 with early adoption permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is in process of evaluating the impact of this pronouncement, which is not expected to have a significant impact on the consolidated financial statements. ASU 2017-01 “Business Combinations (Topic 805): Clarifying the Definition of a Business” (“ASU 2017-01”) changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is deemed to be a business. Determining whether a transferred set constitutes a business is important because the accounting for a business combination differs from that of an asset acquisition. The definition of a business also affects the accounting for dispositions. Under the new standard, when substantially all of the fair value of assets acquired is concentrated in a single asset, or a group of similar assets, the assets acquired would not represent a business and business combination accounting would not be required. The new standard may result in more transactions being accounted for as asset acquisitions rather than business combinations. For public companies, ASU 2017-01 is effective for interim and annual periods beginning after December 15, 2017 and shall be applied prospectively. The Company early adopted ASU 2017-01 as of July 1, 2017 and the new definition is used for accounting purposes. ASU 2016-18 “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”) requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. For public companies, ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The Company determined the adoption of ASU 2016-18 will not have a significant impact on the consolidated financial statements. ASU 2016-13 “Financial Instruments —Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”) amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, Topic 326 eliminates the probable initial recognition threshold in current GAAP and, instead, requires an entity to reflect its current estimate of all expected credit losses. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets to present the net amount expected to be collected. For available for sale debt securities, credit losses should be measured in a manner similar to current GAAP, however Topic 326 will require that credit losses be presented as an allowance rather than as a write-down. ASU 2016-13 affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments affect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For public business entities, ASU 2016-13 is effective for financial statements issued for fiscal years beginning after December 15, 2019, and interim periods therein. The Company is continuing to evaluate the impact of the adoption of ASU 2016-13 and is uncertain of the impact on the consolidated financial statements at this point in time. ASU 2016-09 “Compensation —Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”) simplifies several aspects of the accounting for employee share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Per ASU 2016-09: (1) all excess tax benefits and tax deficiencies should be recognized as income tax expense or benefit in the income statement, rather than in additional paid-in capital under current guidance; (2) excess tax benefits should be classified along with other income tax cash flows as an operating activity on the statement of cash flows, rather than as a separate cash inflow from financing activities and cash outflow from operating activities under current guidance; (3) cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity; and (4) an entity can make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest, as under current guidance, or account for forfeitures when they occur. For public business entities, ASU 2016-09 is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods therein. Effective January 1, 2017, the Company adopted ASU 2016-09. The Company prospectively applied the guidance for the presentation of excess tax benefits as an operating cash flow and included the $268 excess income tax benefit as an operating activity on the consolidated statement of cash flows for the year ended December 31, 2017. In addition, the Company retrospectively applied the guidance for the presentation of the cash paid by an employer when directly withholding shares for tax-withholding purposes be classified as a financing activity on the consolidated statement of cash flows for the years ended December 31, 2017, 2016 and 2015. Finally, the Company elected to account for forfeitures as they occur. ASU 2016-02 “Leases (Topic 842)” (“ASU 2016-02”) is intended to improve the reporting of leasing transactions to provide users of financial statements with more decision-useful information. ASU 2016-02 will require organizations that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is in process of evaluating the impact of this pronouncement, which is not expected to have a significant impact on the consolidated financial statements. ASU 2016-01 “Financial Instruments─Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”) amends certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. ASU 2016-01, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (vii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. This update will be effective for the Company on January 1, 2018. The Company does not expect the adoption of ASU 2016-01 to have a significant impact on the consolidated financial statements. ASU 2014-09 “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”) implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. The original effective date for ASU 2014-09 was for annual and interim periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU 2015-14, which deferred the effective date by one year, therefore it is now effective for interim and annual reporting periods beginning after December 15, 2017. Our revenue is comprised of interest income on financial assets, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. We have completed our evaluation of the impact of ASU 2014-09 on components of our non-interest income and have not found any significant changes to our methodology of recognizing revenue. As required by ASU 2014-09, we will adopt the standard in the first quarter of 2018 and, at the time of this filing, there will be no cumulative effect adjustment to opening retained earnings. We will include newly applicable revenue disclosures in our Form 10-Q for the quarter ended March 31, 2018.

Investment Securities

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Debt and equity securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost, related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss), and fair value of securities are as follows:



	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Available for Sale
U.S. government agencies	$	10,829	$	9	$	18	$	10,820
Corporate bonds	17,500		330		—		17,830
Municipal securities	55,499		189		211		55,477
Mortgage-backed securities	91,734		58		1,068		90,724
Collateralized mortgage obligations	53,559		9		925		52,643
Asset-backed securities	616		7		—		623
	$	229,737	$	602	$	2,222	$	228,117



	December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Available for Sale
U.S. government agencies	$	732	$	—	$	36	$	696
Municipal securities	14,540		2		500		14,042
Mortgage-backed securities	49,907		83		871		49,119
Collateralized mortgage obligations	38,507		32		612		37,927
Asset-backed securities	764		11		—		775
	$	104,450	$	128	$	2,019	$	102,559

The following tables disclose the Company’s investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months:



	December 31, 2017
	Less Than 12 Months				12 Months or More				Totals
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Available for Sale
U.S. government agencies	$	3,470	$	4	$	629	$	14	$	4,099	$	18
Municipal securities	14,593		79		7,092		132		21,685		211
Mortgage-backed securities	52,075		513		29,485		555		81,560		1,068
Collateralized mortgage obligations	31,581		395		20,305		530		51,886		925
	$	101,719	$	991	$	57,511	$	1,231	$	159,230	$	2,222



	December 31, 2016
	Less Than 12 Months				12 Months or More				Totals
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Available for Sale
U.S. government agencies	$	—	$	—	$	696	$	36	$	696	$	36
Municipal securities	12,060		478		518		22		12,578		500
Mortgage-backed securities	37,274		802		6,848		69		44,122		871
Collateralized mortgage obligations	29,618		584		1,618		28		31,236		612
	$	78,952	$	1,864	$	9,680	$	155	$	88,632	$	2,019

The number of investment positions in an unrealized loss position totaled 118 and 72 at December 31, 2017 and December 31, 2016, respectively. The Company does not believe these unrealized losses are “other than temporary.” In estimating other-than-temporary impairment losses, management considers, among other things, the length of time and the extent to which the fair value has been less than cost and the Company’s financial condition and near-term prospects. Additionally, management does not (i) have the intent to sell investment securities prior to recovery and/or maturity and, (ii) it is more likely than not that the Company will not have to sell these securities prior to recovery and/or maturity and (iii) that the length of time and extent that fair value has been less than cost is not indicative of recoverability. The unrealized losses noted are interest rate related due to the level of interest rates at December 31, 2017 compared to the time of purchase. The Company has reviewed the ratings of the issuers and has not identified any issues related to the ultimate repayment of principal as a result of credit concerns on these securities.

The amortized costs and estimated fair values of securities available for sale, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayments penalties. Mortgage-backed securities, collateralized mortgage obligations, and asset-backed securities typically are issued with stated principal amounts, and the securities are backed by pools of mortgage loans and other loans that have varying maturities. The term of mortgage-backed, collateralized mortgage obligations and asset-backed securities thus approximates the term of the underlying mortgages and loans and can vary significantly due to prepayments. Therefore, these securities are not included in the maturity categories below.



	December 31, 2017
	Available For Sale
	Amortized		Fair
	Cost		Value
Due in one year or less	$	2,328	$	2,330
Due from one year to five years	29,654		29,991
Due from five years to ten years	34,480		34,474
Due after ten years	17,366		17,332
	83,828		84,127
Mortgage-backed securities	91,734		90,724
Collateralized mortgage obligations	53,559		52,643
Asset-backed securities	616		623
	$	229,737	$	228,117



	December 31, 2016
	Available For Sale
	Amortized		Fair
	Cost		Value
Due in one year or less	$	—	$	—
Due from one year to five years	4,009		3,974
Due from five years to ten years	3,522		3,346
Due after ten years	7,741		7,418
	15,272		14,738
Mortgage-backed securities	49,907		49,119
Collateralized mortgage obligations	38,507		37,927
Asset-backed securities	764		775
	$	104,450	$	102,559

Proceeds from sales of investment securities available for sale and gross gains and losses for the years ended December 31, 2017, 2016 and 2015 were as follows:



	December 31,
	2017		2016		2015
Proceeds from sales	$	159,869	$	8,378	$	3,779
Gross realized gains	398		43		42
Gross realized losses	176		40		35

The increase in proceeds from sales for the year ended December 31, 2017 compared to December 31, 2016 and December 31, 2015 resulted from the sale of Sovereign investment securities that did not fit our investment strategy. There were no gross gains from calls of investment securities included in gain on sale of investment securities in the accompanying consolidated statements of income for the year ended December 31, 2017, $12 in gross gains from calls of investment securities included in the consolidated statements of income for the year ended December 31, 2016 and no gross gains from calls of investment securities included in the consolidated statements of income for the year ended December 31, 2015.

As further explained in Note 11, there was a blanket floating lien on all securities to secure FHLB advances as of December 31, 2017 and December 31, 2016.

Loans and Allowance for Loan Losses

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Loans and Allowance for Loan Losses

Loans in the accompanying consolidated balance sheets are summarized as follows:



	December 31,			December 31,
	2017			2016
Real estate:
Construction and land	$	277,825		$	162,614
Farmland	9,385			8,262
1 - 4 family residential	251,665			140,137
Multi-family residential	91,152			14,683
Commercial Real Estate	909,292			370,696
Commercial	684,551			291,416
Consumer	9,648			4,089
	2,233,518			991,897
Deferred loan fees	(28		)	(55		)
Allowance for loan losses	(12,808		)	(8,524		)
	$	2,220,682		$	983,318

Included in the net loan portfolio as of December 31, 2017 and 2016 is an accretable discount related to loans acquired within a business combination in the approximate amounts of $12,135 and $469, respectively. The discount is being accreted into income on a level-yield basis over the life of the loans. In addition, included in the net loan portfolio as of December 31, 2017 and 2016 is a discount on retained loans from sale of originated Small Business Administration (“SBA”) loans of $1,189 and $832, respectively.

An institution which has reported loans for construction, land development, and other land loans representing 100% or more of total risk-based capital, or total non-owner occupied commercial real estate loans representing 300% or more of the institution’s total risk-based capital and the outstanding balance of commercial real estate loan portfolio has increased by 50% or more during the prior 36 months, may be identified for further supervisory analysis by regulators to assess the nature and risk posed by the concentration. As of December 31, 2017, the Company had total commercial real estate loans (CRE) representing 328% of total risk-based capital. Included in these amounts, the Company had construction, land development, and other land loans representing 94% of total risk-based capital at December 31, 2017 indicating a concentration in commercial real estate lending. Sound risk management practices and appropriate levels of capital are essential elements of a sound commercial real estate lending program. Concentrations of CRE exposures add a dimension of risk that compounds the risk inherent in individual loans. Interagency guidance on CRE concentrations describes sound risk management practices, which include board and management oversight, portfolio management, management information systems, market analysis, portfolio stress testing and sensitivity analysis, credit underwriting standards, and credit risk review functions. At December 31, 2017, management believes that it has implemented these practices in order to monitor its CRE lending program and that it is in compliance with the requirements and guidance of federal banking agencies including the federal reserve for institutions with concentrations in commercial real estate lending.

The majority of the loan portfolio consists of loans to businesses and individuals in the Dallas-Fort Worth metroplex and the Houston metropolitan area. This geographic concentration subjects the loan portfolio to the general economic conditions within these areas. The risks created by this concentration have been considered by management in the determination of the adequacy of the allowance for loan losses. Management believes the allowance for loan losses was adequate to cover estimated losses on loans as of December 31, 2017 and 2016.

Non-Accrual and Past Due Loans

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are placed on non-accrual status when, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, as well as when required by regulatory provisions. Loans may be placed on non-accrual status regardless of whether or not such loans are considered past due. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is subsequently recognized only to the extent cash payments are received in excess of principal due. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Non-accrual loans aggregated by class of loans, as of December 31, 2017 and 2016, are as follows:



	December 31,		December 31,
	2017⁽¹⁾		2016
Real estate:
Construction and land	$	—	$	—
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial Real Estate	61		—
Commercial	398		930
Consumer	6		11
	$	465	$	941

⁽¹⁾Excludes PCI loans. PCI loans are generally reported as accrual loans unless significant concerns exist related to the predictability of the timing and amount of future cash flows.

During the years ended December 31, 2017 and 2016, interest income not recognized on non-accrual loans was minimal.

An age analysis of past due loans, aggregated by class of loans, as of December 31, 2017 and 2016 is as follows:



	December 31, 2017
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current⁽¹⁾		Total Loans		Total 90 Days Past Due and Still Accruing⁽²⁾
Real estate:
Construction and land	$	320	$	—	$	—	$	320	$	277,505	$	277,825	$	—
Farmland	104		—		—		104		9,281		9,385		—
1 - 4 family residential	1,274		139		—		1,413		250,252		251,665		—
Multi-family residential	—		—		—		—		91,152		91,152		—
Commercial Real Estate	1,830		—		—		1,830		907,462		909,292		—
Commercial	1,849		389		389		2,627		681,924		684,551		—
Consumer	39		51		18		108		9,540		9,648		18
	$	5,416	$	579	$	407	$	6,402	$	2,227,116	$	2,233,518	$	18

⁽¹⁾Includes PCI loans.

⁽²⁾ Loans 90 days past due and still accruing excludes $3.3 million of PCI loans as of December 31, 2017. No PCI loans were considered non-performing loans as of December 31, 2017.



	December 31, 2016
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due and Still Accruing
Real estate:
Construction and land	$	1,047	$	—	$	—	$	1,047	$	161,567	$	162,614	$	—
Farmland	—		—		—		—		8,262		8,262		—
1 - 4 family residential	510		214		—		724		139,413		140,137		—
Multi-family residential	—		—		—		—		14,683		14,683		—
Commercial Real Estate	—		—		754		754		369,942		370,696		754
Commercial	1,344		438		532		2,314		289,102		291,416		81
Consumer	41		—		—		41		4,048		4,089		—
	$	2,942	$	652	$	1,286	$	4,880	$	987,017	$	991,897	$	835

Loans past due 90 days and still accruing, decreased from $835 as of December 31, 2016 to $18 as of December 31, 2017. These loans are also considered well-secured and in the process of collection as of the reporting date with plans in place for the borrowers to bring the notes fully current. The Company believes that it will collect all principal and interest due on each of the loans past due 90 days and still accruing.

Impaired Loans

Impaired loans are those loans where it is probable the Company will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. All troubled debt restructurings (“TDRs”) are considered impaired loans. Impaired loans are measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price; or the fair value of the collateral if the loan is collateral dependent. Substantially all of the Company’s impaired loans are measured at the fair value of the collateral. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

Impaired loans, including PCI loans that have experienced further deterioration in credit quality subsequent to the acquisition date and TDRs, at December 31, 2017 and 2016 are summarized in the following tables.



	December 31, 2017⁽¹⁾
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment YTD
Real estate:
Construction and land	$	—	$	—	$	—	$	—	$	—	$	—
Farmland	—		—		—		—		—		—
1 - 4 family residential	161		161		—		161		—		163
Multi-family residential	—		—		—		—		—		—
Commercial Real Estate	434		434		—		434		—		445
Commercial	398		282		116		398		12		499
Consumer	75		75		—		75		—		87
Total	$	1,068	$	952	$	116	$	1,068	$	12	$	1,194

⁽¹⁾Excludes PCI loans that have not experienced further deterioration in credit quality subsequent to the acquisition date.



	December 31, 2016
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment YTD
Real estate:
Construction and land	$	—	$	—	$	—	$	—	$	—	$	—
Farmland	—		—		—		—		—		—
1 - 4 family residential	164		164		—		164		—		265
Multi-family residential	—		—		—		—		—		—
Commercial Real Estate	382		382		—		382		—		440
Commercial	955		381		574		955		246		463
Consumer	92		81		11		92		4		12
Total	$	1,593	$	1,008	$	585	$	1,593	$	250	$	1,180

Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis.

During the years ended December 31, 2017, 2016 and 2015, total interest income and cash-based interest income recognized on impaired loans was minimal.

Troubled Debt Restructuring

Modifications of terms for the Company’s loans and their inclusion as TDRs are based on individual facts and circumstances. Loan modifications that are included as TDRs may involve a reduction of the stated interest rate of the loan, an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk, or deferral of principal payments, regardless of the period of the modification. The recorded investment in TDRs was $618 and $822 as of December 31, 2017 and 2016, respectively.

There were no new TDRs during the year ended December 31, 2017, three new TDRs during the year ended December 31, 2016 and two new TDRs during the year ended December 31, 2015. The terms of certain loans modified as TDRs during the year ended December 31, 2016 and December 31, 2015 are summarized in the following tables:



				During the year ended December 31, 2016
				Post-Modification Outstanding Recorded Investment
	Number of Loans	Pre- Modification Outstanding Recorded Investment		Adjusted Interest Rate		Extended Maturity		Extended Maturity and Restructured Payments		Extended Maturity, Restructured Payments and Adjusted Interest Rate
Commercial	2	$	175	$	—	$	—	$	169	$	—
Consumer	1	81		—		—		81		—
Total	3	$	256	$	—	$	—	$	250	$	—



				During the year ended December 31, 2015
				Post-Modification Outstanding Recorded Investment
	Number of Loans	Pre- Modification Outstanding Recorded Investment		Adjusted Interest Rate		Extended Maturity		Extended Maturity and Restructured Payments		Extended Maturity, Restructured Payments and Adjusted Interest Rate
Commercial Real Estate	1	$	399	$	—	$	—	$	—	$	391
Commercial	1	268		—		—		246		—
Total	2	$	667	$	—	$	—	$	246	$	391

All TDRs are measured individually for impairment. Of the three new TDR loans during the year ended December 31, 2016, two are past due and one is performing as agreed to modified terms. A specific allowance for loan losses of $38 is recorded for one of the loans as of December 31, 2016. One of the three loans is on non-accrual status as of December 31, 2016.

Of the two new TDR loans during the year ended December 31, 2015, both are performing as agreed to the modified terms. A specific allowance for loan losses of $132 is recorded for one of the loans as of December 31, 2015. One of the two loans were on non-accrual status as of December 31, 2015.

Interest income recorded during 2017, 2016 and 2015 on TDR loans and interest income that would have been recorded had the terms of the loan not been modified was minimal.

There were no loans modified as a troubled debt restructured loan for which there was a payment default during the year ended December 31, 2017 or December 31, 2016. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral.

The Company has not committed to lend additional amounts to customers with outstanding loans that were classified as TDRs as of December 31, 2017 and 2016.

Credit Quality Indicators

From a credit risk standpoint, the Company classifies its loans in one of the following categories: (i) pass, (ii) special mention, (iii) substandard or (iv) doubtful. Loans classified as loss are charged-off. Loans not rated special mention, substandard, doubtful, or loss are classified as pass loans.

The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on criticized credits monthly. Ratings are adjusted to reflect the degree of risk and loss that is felt to be inherent in each credit as of each monthly reporting period. All classified credits are evaluated for impairments. If impairment is determined to exist, a specific reserve is established. The Company’s methodology is structured so that specific reserves are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss).

Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits with a lower rating.

Credits rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses which exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed.

Credits rated doubtful are those in which full collection of principal appears highly questionable, and in which some degree of loss is anticipated, even though the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on non-accrual.

Credits classified as PCI are those that, at acquisition date, had the characteristics of substandard loans and it was probable, at acquisition, that all contractually required principal and interest payments would not be collected. The Company evaluates these loans on a projected cash flow basis with this evaluation performed quarterly.

The following tables summarize the Company’s internal ratings of its loans, including PCI loans, as of December 31, 2017 and 2016:



	December 31, 2017
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	277,186	$	639	$	—	$	—	$	—	$	277,825
Farmland	9,336		—		—		—		49		9,385
1 - 4 family residential	250,904		462		200		—		99		251,665
Multi-family residential	91,152		—		—		—		—		91,152
Commercial Real Estate	882,523		8,771		681		—		17,317		909,292
Commercial	634,796		18,337		1,155		116		30,147		684,551
Consumer	9,540		—		108		—		—		9,648
Total	$	2,155,437	$	28,209	$	2,144	$	116	$	47,612	$	2,233,518



	December 31, 2016
	Pass		Special Mention		Substandard		Doubtful		Total
Real estate:
Construction and land	$	162,614	$	—	$	—	$	—	$	162,614
Farmland	8,262		—		—		—		8,262
1 - 4 family residential	139,212		710		215		—		140,137
Multi-family residential	14,683		—		—		—		14,683
Commercial Real Estate	368,370		2,326		—		—		370,696
Commercial	289,589		686		1,034		107		291,416
Consumer	4,078		—		11		—		4,089
Total	$	986,808	$	3,722	$	1,260	$	107	$	991,897

An analysis of the allowance for loan losses for the years ended December 31, 2017 , 2016 and 2015 is as follows:



	For the			For the			For the
	Year Ended			Year Ended			Year Ended
	December 31, 2017			December 31, 2016			December 31, 2015
Balance at beginning of year	$	8,524		$	6,772		$	5,981
Provision charged to earnings	5,114			2,050			868
Charge-offs	(839		)	(333		)	(140		)
Recoveries	9			35			63
Net charge-offs	(830		)	(298		)	(77		)
Balance at end of year	$	12,808		$	8,524		$	6,772

The allowance for loan losses as a percentage of total loans was 0.57%, 0.86% and 0.83% as of December 31, 2017, 2016 and 2015, respectively.

The following tables summarize the activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2017, 2016 and 2015:



	December 31, 2017
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	1,415		$	1,116		$	3,003	$	2,955		$	35		$	8,524
Provision (recapture) charged to earnings	(100		)	368			1,407		3,452			(13		)	5,114
Charge-offs	—			(11		)	—		(828		)	—			(839		)
Recoveries	—			—			—		9			—			9
Net charge-offs (recoveries)	—			(11		)	—		(819		)	—			(830		)
Balance at end of year	$	1,315		$	1,473		$	4,410	$	5,588		$	22		$	12,808

Period-end amount allocated to:
Specific reserves:	$	—		$	—		$	—	$	12		$	—		$	12
General reserves	1,315			1,473			4,410		5,576			22			12,796
Total	$	1,315		$	1,473		$	4,410	$	5,588		$	22		$	12,808



	December 31, 2016
	Real Estate
	Construction, Land and Farmland		Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	1,104	$	1,124		$	2,189	$	2,324		$	31		$	6,772
Provision (recapture) charged to earnings	311		(8		)	814		913			20			2,050
Charge-offs	—		—			—		(314		)	(19		)	(333		)
Recoveries	—		—			—		32			3			35
Net charge-offs (recoveries)	—		—			—		(282		)	(16		)	(298		)
Balance at end of year	$	1,415	$	1,116		$	3,003	$	2,955		$	35		$	8,524

Period-end amount allocated to:
Specific reserves:	$	—	$	—		$	—	$	246		$	4		$	250
General reserves	1,415		1,116			3,003		2,709			31			8,274
Total	$	1,415	$	1,116		$	3,003	$	2,955		$	35		$	8,524



	December 31, 2015
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	769		$	1,166		$	1,890	$	2,092		$	64		$	5,981
Provision (recapture) charged to earnings	383			(42		)	294		262			(29		)	868
Charge-offs	(48		)	—			—		(87		)	(5		)	(140		)
Recoveries	—			—			5		57			1			63
Net charge-offs (recoveries)	(48		)	—			5		(30		)	(4		)	(77		)
Balance at end of year	$	1,104		$	1,124		$	2,189	$	2,324		$	31		$	6,772

Period-end amount allocated to:
Specific reserves:	$	—		$	—		$	—	$	186		$	7		$	193
General reserves	1,104			1,124			2,189		2,138			24			6,579
Total	$	1,104		$	1,124		$	2,189	$	2,324		$	31		$	6,772

The Company’s recorded investment in loans as of December 31, 2017 and 2016 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows:



	December 31, 2017
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	—	$	161	$	434	$	398	$	75	$	1,068
Loans collectively evaluated for impairment	287,161		342,557		891,541		654,006		9,573		2,184,838
PCI loans	49		99		17,317		30,147		—		47,612
Total	$	287,210	$	342,817	$	909,292	$	684,551	$	9,648	$	2,233,518



	December 31, 2016
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	—	$	164	$	382	$	955	$	92	$	1,593
Loans collectively evaluated for impairment	170,876		154,656		370,314		290,461		3,997		990,304
Total	$	170,876	$	154,820	$	370,696	$	291,416	$	4,089	$	991,897

Loans acquired with evidence of credit quality deterioration at acquisition, for which it was probable that the Company would not be able to collect all contractual amounts due, were accounted for as PCI loans. The carrying amount of PCI loans included in the consolidated balance sheets and the related outstanding balances at December 31, 2017 are set forth in the table below. The outstanding balance represents the total amount owed, including accrued but unpaid interest, and any amounts previously charged off. The carrying amount of PCI loans for the year ended December 31, 2016 was minimal and has been excluded from the table below.



	Year Ended December 31, 2017
Carrying amount	$	47,612
Outstanding balance	63,940

Changes in the accretable yield for PCI loans for the year ended December 31, 2017 are included in table below. There was no accretable yield balance for PCI loans for the years ended December 31, 2016 and 2015.



	Year Ended December 31, 2017
Balance at beginning of period	$	—
Additions through acquisitions	3,927
Accretion	(1,204		)
Balance at year-end	$	2,723

Servicing Assets

The Company was servicing loans of approximately $74,737 and $32,905 as of December 31, 2017 and 2016. A summary of the changes in the related servicing assets are as follows:



	Year Ended December 31,
	2017			2016
Balance at beginning of year	$	601		$	426
Servicing assets acquired through acquisition	313			—
Increase from loan sales	522			365
Amortization charged to income	(193		)	(190		)
Transfer of servicing assets to held for sale	(28		)	—
Balance at year-end	$	1,215		$	601

The estimated fair value of the servicing assets approximated the carrying amount at December 31, 2017. Fair value is estimated by discounting estimated future cash flows from the servicing assets using discount rates that approximate current market rates over the expected lives of the loans being serviced. A valuation allowance is recorded when the fair value is below the carrying amount of the asset. As of December 31, 2017 and 2016, there were no valuation allowances recorded.

The Company may also receive a portion of subsequent interest collections on loans sold that exceed the contractual servicing fee. In that case, the Company records an interest-only strip based on its relative fair market value and the other components of the loans. There was no interest-only strip receivable recorded at December 31, 2017 and 2016.

During the fiscal year ended December 31, 2017, 2016 and 2015, the Bank sold $27,747, $18,704 and $6,724, respectively, of SBA loans resulting in a gain of $1,940, $1,690 and $550, respectively. The gain on sale of SBA loans is recorded in Gain on sales of loans in the Consolidated Statements of Income.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Bank Premises and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Bank Premises and Equipment

Bank premises and equipment in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Building and improvements	$	35,239	$	7,673
Site improvements	140		—
Tenant improvements	744		—
Leasehold improvements	5,132		3,119
Land	33,002		6,671
Furniture, fixtures and equipment	7,588		5,106
Construction in Progress	456		365
	82,301		22,934
Less accumulated depreciation	7,050		5,521
	$	75,251	$	17,413

The Company recorded depreciation expense of approximately $1,566, $1,111 and $1,040 for the years ended December 31, 2017, 2016 and 2015, respectively.

Non-marketable Equity Securities

12 Months Ended

Dec. 31, 2017

Non-marketable Equity Securities.

Non-marketable Equity Securities

Investments in non-marketable equity securities in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
FHLB of Dallas stock	$	6,431	$	3,846
FRB of Dallas stock	3,482		3,470
Other non-marketable equity securities	3,819		50
	$	13,732	$	7,366

Intangible Assets

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible assets in the accompanying consolidated balance sheets are summarized as follows:



	December 31, 2017
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	8.7 years	$	17,007	$	2,694	$	14,313
Servicing asset	6.8 years	1,621		406		1,215
Intangible lease assets	3.3 years	5,281		368		4,913
		$	23,909	$	3,468	$	20,441



	December 31, 2016
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	6.2 years	$	3,459	$	1,914	$	1,545
Servicing asset	7.9 years	814		213		601
Other intangible assets	4.3 years	106		71		35
		$	4,379	$	2,198	$	2,181

For the years ended December 31, 2017, 2016 and 2015, amortization expense related to intangible assets of approximately $1,270, $595 and $378 respectively, is included within amortization of intangibles, occupancy and equipment and other income within the consolidated statements of income. The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2017 was as follows:



Year	Amount
2018	$	3,744
2019	2,981
2020	2,692
2021	2,147
2022	1,896
Thereafter	6,981
	$	20,441

Goodwill

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Changes in the carrying amount of goodwill in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Balance as of December 31, 2016	$	26,865	$	26,865
Sovereign acquisition	109,091		—
Liberty acquisition	23,496		—
Balance as of December 31, 2017	$	159,452	$	26,865

Deposits

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Deposits

Deposits in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Noninterest-bearing demand accounts	$	612,830	$	327,614
Interest-bearing demand accounts	187,516		69,570
Savings accounts	52,822		11,166
Limited access money market accounts	960,149		579,950
Certificates of deposit, greater than $100	419,888		115,214
Certificates of deposit, less than $100	45,425		16,116
Total	$	2,278,630	$	1,119,630

As of December 31, 2017, the scheduled maturities of certificates of deposit were as follows:



Year	Amount
2018	$	413,269
2019	37,788
2020	10,508
2021	2,120
2022	1,628
2023	—
Total	$	465,313

The aggregate amount of demand deposit overdrafts that have been reclassified as loans were $203 and $30 as of December 31, 2017 and 2016, respectively. Brokered deposits at December 31, 2017 and 2016 totaled approximately $88,195 and $27,035, respectively.

Advances from the Federal Home Loan Bank

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Advances from the Federal Home Loan Bank

Advances from the FHLB totaled $71,164 and $38,306 at December 31, 2017 and 2016, respectively. As of December 31, 2017, the advances were collateralized by a blanket floating lien on certain securities and loans, had a weighted average rate of 1.36% and mature on various dates in 2018 and 2022. The Company had the availability to borrow additional funds of approximately $721,594 as of December 31, 2017.

Contractual maturities of FHLB advances at December 31, 2017 were as follows:



2018	$	68,000
2022	3,164
Thereafter	—
Total	$	71,164

Other Credit Extensions	12 Months Ended
Other Credit Extensions	Dec. 31, 2017
Debt Disclosure [Abstract]
Other Credit Extensions	Other Credit Extensions As of December 31, 2017 and 2016, the Company maintained two credit facilities with commercial banks which provide federal funds credit extensions with an availability to borrow up to an aggregate amount of approximately $55,000 and $14,600, respectively. There were no borrowings against these lines as of December 31, 2017 and 2016. As of December 31, 2017 and 2016, the Company maintained a secured line of credit with the FRB with an availability to borrow approximately $338,592 and $197,262, respectively. Approximately $423,062 and $265,001 of commercial loans were pledged as collateral at December 31, 2017 and 2016, respectively. There were no borrowings against this line as of December 31, 2017 and 2016.

Borrowed Funds

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Borrowed Funds

Borrowed funds in the accompanying consolidated balance sheets are as follows:



	December 31,
	2017		2016
Junior subordinated debentures	$	11,702	$	3,093
Subordinated notes ⁽¹⁾	4,987		4,942
Federal funds purchased	15,000		—


(1)	Subordinated notes are net of discount of $13 and $15 and issuance costs of $36 and $43 as of December 31, 2017 and 2016, respectively.

Junior Subordinated Debentures

The Company assumed in a previous acquisition $3,093 in fixed/floating rate junior subordinated debentures underlying common securities and preferred capital securities, or the Parkway Trust Securities, issued by Parkway National Capital Trust I (“Parkway Trust”), a statutory business trust and acquired wholly-owned subsidiary of the Company. The Company assumed the guarantor position and as such, unconditionally guarantees payment of accrued and unpaid distributions required to be paid on the Parkway Trust Securities subject to certain exceptions, the redemption price when a capital security is called for redemption and amounts due if a trust is liquidated or terminated.

The Company owns all of the outstanding common securities of the Parkway Trust. The Parkway Trust used the proceeds from the issuance of its Parkway Trust Securities to buy the debentures originally issued by Fidelity Resource Company. These debentures are the Parkway Trust’s only assets and the interest payments from the debentures finance the distributions paid on the Parkway Trust Securities.

The Parkway Trust Securities pay cumulative cash distributions quarterly at a rate per annum equal to the 3-month LIBOR plus 1.85% percent. So long as no event of default leading to an acceleration event has occurred, the Company has the right at any time and from time to time during the term of the debenture to defer payments of interest by extending the interest distribution period for up to twenty consecutive quarterly periods. The effective rate as of December 31, 2017 and 2016 was 3.44% and 2.70%, respectively. The Parkway Trust Securities are subject to mandatory redemption in whole or in part, upon repayment of the debentures at the stated maturity in the year 2036 or their earlier redemption, in each case at a redemption price equal to the aggregate liquidation preference of the Parkway Trust Securities plus any accumulated and unpaid distributions thereon to the date of redemption. Prior redemption is permitted under certain circumstances.

In connection with the acquisition of Sovereign Bancshares, Inc. (“Sovereign”) on August 1, 2017, the Company assumed $8,609 in floating rate junior subordinated debentures underlying common securities and preferred capital securities, or the SovDallas Trust Securities, issued by SovDallas Capital Trust I (“SovDallas Trust”), a statutory business trust and acquired wholly-owned subsidiary of the Company. The Company assumed the guarantor position and as such, unconditionally guarantees payment of accrued and unpaid distributions required to be paid on the SovDallas Trust Securities subject to certain exceptions, the redemption price when a capital security is called for redemption and amounts due if a trust is liquidated or terminated. The Company also owns all of the outstanding common securities of the SovDallas Trust.

The SovDallas Trust invested the total proceeds from the sale of the SovDallas Trust Securities and the investment in common shares in floating rate junior subordinated debentures originally issued by Sovereign. Interest on the SovDallas Trust Securities is payable quarterly at a rate equal to 3-month LIBOR plus 4.0%. Principal payments are due at maturity in July 2038. The effective rate as of December 31, 2017 was 5.34%. The SovDallas Trust Securities are guaranteed by the Company and are subject to redemption. The Company may redeem the debt securities, in whole or in part, at any time at an amount equal to the principal amount of the debt securities being redeemed plus any accrued and unpaid interest.

The Parkway Trust Securities and SovDallas Trust Securities qualify as Tier 1 capital, subject to regulatory limitations, under guidelines established by the Federal Reserve.

Subordinated Notes

During 2013 the Company issued, in the aggregate principal amount of $5,000, subordinated promissory notes (“Notes”) via a private offering. The Notes were issued to certain entities controlled by an affiliate of the Company for the purpose of using the proceeds to support the growth of the Company. The Notes are unsecured, with interest payable quarterly at a fixed rate of 6.0% per annum, and unpaid principal and interest due at the stated maturity on December 31, 2023. The Notes qualify as Tier 2 Capital, subject to regulatory limitations, under guidelines established by the Federal Reserve. In addition, the Notes may be redeemed in whole or in part on any interest payment date that occurs on or after December 23, 2018 subject to approval of the Federal Reserve in compliance with applicable statutes and regulations.

In connection with the issuance of the Notes, the Company issued warrants to purchase 25,000 shares of common stock of the Company at an exercise price of $11.00 per share, exercisable at any time, in whole or in part, prior to December 31, 2023. The fair value of the warrants was calculated at $0.80 and is recorded as additional paid-in capital and the related debt discount is being accreted into interest expense.

Federal Funds Purchased

Federal funds purchased are unsecured overnight borrowings from other financial institutions. At December 31, 2017, the Company had $15,000 in federal funds purchased carried at a rate of 2.00% which matured and was paid off on January 1, 2018. At December 31, 2016, the Company had no federal funds purchased.

Income Taxes

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

The Tax Act, enacted on December 22, 2017, reduced the U.S. federal corporate tax rate from 35% to 21%. Also on December 22, 2017, the SEC issued SAB 118, which provides guidance on accounting for tax effects of the Act. SAB 118 provides a measurement period of up to one year from the enactment date to complete the accounting. Based on the information available and current interpretation of the rules, the Company has made reasonable estimates of the impact of the reduction in the corporate tax rate and re-measurement of certain deferred tax assets and liabilities based on the rate at which they are expected to reverse in the future. The Company is still analyzing certain provisional estimates for the Sovereign and Liberty acquisitions as specified in Note 24 - Business Combinations. Any changes to these provisional estimates and re-measurement of deferred taxes could potentially have an impact on our future earnings and effective tax rate. The provisional amount recorded related to the re-measurement of the Company's deferred tax balance was $3,051 for the year ended December 31, 2017.

The provision for income taxes is summarized as follows:



	Year Ended December 31,
	2017		2016			2015
Income tax expense (benefit):
Current	$	7,886	$	7,833		$	4,492
Deferred	5,143		(1,366		)	(375		)
	$	13,029	$	6,467		$	4,117

The table below reconciles income tax expense for the years ended December 31, 2017, 2016 and 2015 computed by applying the applicable U.S. Federal statutory income tax rate, reconciled to the tax expense computed at the effective income tax rate:



	Year Ended December 31,
	2017			2016			2015
Federal income tax expense rate at 35% for December 31, 2017 and 2016 and 34% for December 31, 2015	$	9,863		$	6,656		$	4,388
Bank-owned life insurance	(206		)	(216		)	(208		)
Non-deductible dues and memberships	132			59			56
Non-deductible meals and entertainment	80			49			46
Excess tax benefit from stock compensation⁽¹⁾	(268		)	—			—
Deferred tax asset re-measurement due to the Tax Act⁽¹⁾	3,051			—			—
Other	377			(81		)	(165		)
Total income tax expense	$	13,029		$	6,467		$	4,117
Effective tax rate	46.2		%	34.0		%	31.9		%

⁽¹⁾Discrete tax item.

Deferred income taxes reflect the net tax effects of temporary differences between the recorded amounts of assets and liabilities for financial reporting purposes, and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities are as follows:



	December 31,		December 31,
	2017		2016
Deferred tax assets:
Net operating loss	$	—	$	165
Organizational costs	64		405
Allowance for loan losses	2,592		2,918
Capital loss carryforward	57		95
FHLB Borrowing	28		57
Deferred rent expenses	302		90
Restricted stock	201		182
Stock options	334		399
Accrued bonuses	22		437
Loan discounts	4,805		211
Deferred compensation	115		—
Other real estate owned	219		—
Net unrealized gain on securities available for sale	340		643
Other	137		214
Total deferred tax assets	9,216		5,816
Deferred tax liabilities:
Core deposit intangibles	3,034		541
Partnership investments	497		—
Bank premises and equipment	912		1,795
Other	163		13
Total deferred tax liabilities	4,606		2,349
Net deferred tax asset	$	4,610	$	3,467

Included within other assets in the accompanying consolidated balance sheets as of December 31, 2017 is a current tax receivable of $7,085 and a deferred tax asset of $4,937. The Company also has a deferred tax liability of $327 classified as branch liabilities held for sale in the accompany consolidated balance sheets as of December 31, 2017. See Note 25 - Branch Assets and Liabilities Held for Sale for additional information. Included in the accompanying consolidated balance sheets as of December 31, 2016 is a current tax receivable of $91 and a net deferred tax asset of $3,467 in other assets.

Commitment and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Litigation

The Company may from time to time be involved in legal actions arising from normal business activities. Management believes that these actions are without merit or that the ultimate liability, if any, resulting from them will not materially affect the financial position or results of operations of the Company.

Lessee: Operating Leases

The Company leases several of its banking facilities under operating leases expiring in various years through 2022 and sublets one operating lease which expired in February of 2018. Certain of the operating leases have rent escalation clauses based on pre-determined annual rate increases and provide for renewal options at their fair value at the time of renewal.

As of December 31, 2017, future minimum rental payments, exclusive of taxes and other charges, under non-cancelable operating leases for each of the next five years were:



Year End December 31,	Future Minimum Rentals
2018	$	2,349
2019	2,215
2020	1,703
2021	889
2022	691
Thereafter	2,134
Total	$	9,981

Rental expense was approximately $2,298, $1,432 and $1,399 for the years ended December 31, 2017, 2016 and 2015, respectively. Sublease rental income was approximately $139, $58 and $30 for the years ended December 31, 2017, 2016 and 2015. The total minimum sublease rental to be received in 2018 under the non-cancelable sublease is approximately $5.

As part of the Sovereign acquisition and our evaluation of acquired facilities owned or leased for ongoing economic benefit, a decision was made to cease using two acquired leases during the current year that expire between 2026 and 2029. In accordance with accounting for exit and disposal activities, the Company recognized a liability for lease exit costs incurred when it no longer derived economic benefits from the related leases. A cease-use liability of $1,407 is included in accrued interest payable and other liabilities in the consolidated balance sheets as of December 31, 2017. The liability was recognized and measured based on a discounted cash flow model when the cease use date occurred. The liability to be recorded as of the cease use date was determined based on the remaining lease rental due, reduced by (1) estimated sublease rental income that could be reasonably obtained for the properties and (2) the associated $1,290 lease intangible liability recorded for unfavorable lease terms on these two acquired leases given the market conditions as of the Sovereign acquisition date. The total expense related to the cease-use liability for the year ended December 31, 2017 was $117, which was recorded in the noninterest expense line item "other" in the consolidated statements of income.

Lessor: Operating Leases

The Company has multiple operating leases with various tenants for partial use of our owned corporate building space, which was purchased by the Company during the year ended December 31, 2017. The rest of the building is used by the Company for corporate offices. These operating leases expire in various years through 2023.

As of December 31, 2017, future minimum payments receivable under non-cancelable operating leases for each of the next five years were:



Year End December 31,	Future Minimum Rentals
2018	$	1,546
2019	1,244
2020	1,076
2021	471
2022	100
Thereafter	100
Total	$	4,537

Rental income was approximately $158 for the year ended December 31, 2017 which is included within other noninterest income in the accompanying consolidated statements of income. No rental income was recognized for the years ended December 31, 2016 and 2015.

The below table summarizes the costs, accumulated amortization/depreciation and carrying amount of the corporate building asset and liability components as they are presented on the consolidated balance sheets as of December 31, 2017.



	Cost		Accumulated Amortization/ Depreciation			Net Carrying Amount
Bank premises, furniture and equipment:
Building and improvements	$	19,872	$	(33	)	$	19,839
Site and tenant improvements	884		(32		)	852
Land	16,781		—			16,781
	37,537		(65		)	37,472
Intangible assets:
Intangible lease assets	4,765		(241		)	4,524

Accrued interest payable and other liabilities:
Intangible lease obligations	584		(19		)	565

Total	$	41,718	$	(287	)	$	41,431

Qualified Affordable Housing Investment

On July 26, 2017, the Company began investing in a qualified housing project. At December 31, 2017, the balance of the investment for qualified affordable housing projects was $1,982. This balance is reflected in non-marketable equity securities on the consolidated balance sheets. The total unfunded commitment related to the investment in a qualified housing project totaled $1,765 at December 31, 2017 which is reflected in accrued interest payable and other liabilities on the consolidated balance sheets. The Company expects to fulfill this commitment during the year ending 2031.

Fair Value Disclosures

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Disclosures

The authoritative guidance for fair value measurements defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.

The authoritative guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1 Inputs. Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs. Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 2 investments consist primarily of obligations of U.S. government agencies, corporate bonds, municipal securities, mortgage-backed securities, collateralized mortgage obligations and asset-backed securities.

Level 3 Inputs. Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market- based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

Assets and liabilities measured at fair value on a recurring basis include the following:

Investment Securities Available For Sale: Securities classified as available for sale are reported at fair value utilizing Level 2 inputs. For those securities classified as Level 2, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U. S. Treasury yield curve, live trading levels, trade execution data for similar securities, market consensus prepayments speeds, credit information and the bond’s terms and conditions, among other things.

The following table summarizes assets measured at fair value on a recurring basis as of December 31, 2017 and 2016, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:



	Fair Value
	Measurements Using
	Level 1		Level 2		Level 3		Total
	Inputs		Inputs		Inputs		Fair Value
As of December 31, 2017
Investment securities available for sale	$	—	$	228,117	$	—	$	228,117
As of December 31, 2016
Investment securities available for sale	$	—	$	102,559	$	—	$	102,559

There were no liabilities measured at fair value on a recurring basis as of December 31, 2017 and 2016.

There were no transfers between Level 2 and Level 3 during the years ended December 31, 2017 and 2016.

Certain assets and liabilities are measured at fair value on a non-recurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment).

Assets measured at fair value on a non-recurring basis include impaired loans and other real estate owned. Impaired loans and other real estate owned that are collateral dependent are measured for impairment using the fair value of the collateral adjusted by additional Level 3 inputs, such as estimated costs to sell. Impaired loans and other real estate owned secured by real estate, receivables or inventory had discounts determined by management on an individual loan basis. Impaired loans and other real estate owned that are not collateral dependent are measured for impairment by a discounted cash flow analysis using a net present value calculation that utilizes data from the loan file. As such, the fair value of impaired loans and other real estate owned are considered a Level 3 in the fair value hierarchy.

Appraisals for impaired loans and other real estate owned are performed by certified general appraisers whose qualifications and licenses have been reviewed and verified by the Company. Once reviewed, a member of the credit department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparisons to independent data sources such as recent market data or industry wide-statistics. On a periodic basis, the Company compares the actual selling price of collateral that has been sold to the most recent appraised value to determine what additional adjustments, if any, should be made to the appraisal value to arrive at fair value.

The Company records other real estate owned at fair value less estimated costs to sell at the date of foreclosure. After foreclosure, other real estate owned is carried at the lower of the initial carrying amount (fair value less estimated costs to sell or lease), or at the value determined by subsequent appraisals or internal valuations of the other real estate owned.

The following table summarizes assets measured at fair value on a non-recurring basis as of December 31, 2017 and 2016, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:



	Fair Value
	Measurements Using
	Level 1		Level 2		Level 3		Total
	Inputs		Inputs		Inputs		Fair Value
As of December 31, 2017
Assets:
Impaired loans	$	—	$	—	$	116	$	116
Other real estate owned	$	—	$	—	$	449	$	449
As of December 31, 2016
Assets:
Impaired loans	$	—	$	—	$	1,593	$	1,593
Other real estate owned	$	—	$	—	$	662	$	662

At December 31, 2017, impaired loans had a carrying value of $116 with $12 specific allowance for loan loss allocated. At December 31, 2016, impaired loans had a carrying value of $1,593, with $250 specific allowance for loan loss allocated.

There were no liabilities measured at fair value on a non-recurring basis as of December 31, 2017 and 2016.

For Level 3 financial assets measured at fair value on a non-recurring basis as of December 31, 2017 and 2016, the significant unobservable inputs used in the fair value measurements were as follows:



December 31, 2017
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	116	Collateral Method	Adjustments for selling costs	8	%
Other real estate owned	$	449	Collateral Method	Adjustments for selling costs	8	%



December 31, 2016
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	1,593	Collateral Method	Adjustments for selling costs	8	%
Other real estate owned	$	662	Collateral Method	Adjustments for selling costs	8	%

Fair Value of Financial Instruments

The Company is required under current authoritative guidance to disclose the estimated fair value of its financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments, as defined. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction.

The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop an estimate of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or valuation methodologies may have a material effect on the estimated fair value amounts. In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values.

The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments, other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows:

Cash and cash equivalents: The carrying amount of cash and cash equivalents approximates their fair value.

Loans and loans held for sale: For variable-rate loans that reprice frequently and have no significant changes in credit risk, fair values are based on carrying values. Fair values for certain mortgage loans (for example, 1-4 family residential), commercial real estate and commercial loans are estimated using discounted cash flow analysis, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Accrued interest: The carrying amounts of accrued interest approximate their fair values due to short-term maturity.

Bank-owned life insurance: The carrying amounts of bank-owned life insurance approximate their fair value.

Servicing Assets: The estimated fair value of the servicing assets approximated the carrying amount at December 31, 2017 and December 31, 2016. Fair value is estimated by discounting estimated future cash flows from the servicing assets using discount rates that approximate current market rates over the expected lives of the loans being serviced. A valuation allowance is recorded when the fair value is below the carrying amount of the asset. At December 31, 2017 and December 31, 2016 no valuation allowance was recorded.

Non-marketable equity securities: The carrying value of restricted securities such as stock in the FHLB of Dallas, FRB of Dallas and other non-marketable equity securities approximates fair value.

Branch assets held for sale: This includes loans, accrued interest, bank premises, furniture and equipment, intangible assets and the cash balances related to branches that were held for sale. The carrying amount of cash and cash equivalents, accrued interest and intangible assets approximates their fair value. The fair value of the bank premises, furniture and equipment is determined based on third party appraisals of similar properties. The fair value of the loans held-for-sale are estimated using discounted cash flow analysis, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is, their carrying amounts). The carrying amounts of variable-rate certificates of deposit (“CDs”) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits.

Advances from Federal Home Loan Bank: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements.

Junior subordinated debentures, subordinated notes and other borrowings: The fair values are based upon prevailing rates on similar debt in the market place.

Branch liabilities held for sale: This includes deposits and accrued interest related to branches that were held for sale. The carrying amount of accrued interest approximates its fair value. The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate CDs approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits.

Off-balance sheet instruments: Commitments to extend credit and standby letters of credit are generally priced at market at the time of funding and were not material to the Company’s consolidated financial statements.

The estimated fair values and carrying values of all financial instruments under current authoritative guidance as of December 31, 2017 and 2016 were as follows:



			Fair Value
	Carrying
	Amount		Level 1		Level 2		Level 3
December 31, 2017
Financial assets:
Cash and cash equivalents	$	149,044	$	—	$	149,044	$	—
Loans held for sale	841		—		841		—
Loans	2,220,682		—		—		2,234,094
Accrued interest receivable	7,676		—		7,676		—
Bank-owned life insurance	21,476		—		21,476		—
Servicing asset	1,243		—		1,243		—
Non-marketable equity securities	13,732		—		13,732		—
Financial instruments assets held for sale	31,828		—		5,515		26,313
Financial liabilities:
Deposits	$	2,278,630	$	—	$	2,164,498	$	—
Advances from FHLB	71,164		—		70,110		—
Accrued interest payable	445		—		445		—
Junior subordinated debentures	11,702		—		11,702		—
Subordinated notes	4,987		—		4,987		—
Other borrowings	15,000		—		15,000		—
Financial instruments liabilities held for sale	64,300		—		64,300		—

December 31, 2016
Financial assets:
Cash and cash equivalents	$	234,791	$	—	$	234,791	$	—
Loans held for sale	5,208		—		5,208		—
Loans	983,318		—		—		987,021
Accrued interest receivable	2,907		—		2,907		—
Bank-owned life insurance	20,077		—		20,077		—
Servicing asset	601		—		601		—
Non-marketable equity securities	7,366		—		7,366		—
Financial liabilities:
Deposits	$	1,119,630	$	—	$	1,085,888	$	—
Advances from FHLB	38,306		—		38,570		—
Accrued interest payable	141		—		141		—
Junior subordinated debentures	3,093		—		3,093		—
Subordinated notes	4,942		—		4,942		—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Financial Instruments with Off-Balance Sheet Risk

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Financial Instruments with Off-Balance Sheet Risk

The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets.

The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on balance sheet instruments.

The following table sets forth the approximate amounts of these financial instruments as of December 31, 2017 and 2016:



	December 31,		December 31,
	2017		2016
Commitments to extend credit	$	606,451	$	236,919
Standby and commercial letters of credit	9,299		6,933
	$	615,750	$	243,852

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Management evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on management’s credit evaluation of the borrower.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Standby letters of credit generally have fixed expiration dates or other termination clauses and may require payment of a fee. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company’s policy for obtaining collateral and the nature of such collateral is essentially the same as that involved in making commitments to extend credit.

Although the maximum exposure to loss is the amount of such commitments, management currently anticipates no material losses from such activities.

Employee Benefits

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Employee Benefits

Defined Contribution Plan

The Company maintains a retirement savings 401(k) profit sharing plan (the “Plan”) in which substantially all employees may participate. The Plan provides for “before tax” employee contributions through salary reductions under section 401(k) of the Internal Revenue Code. The Company may make a discretionary match of employees’ contributions based on a percentage of salary deferrals and certain discretionary profit sharing contributions. No matching contributions to the Plan were made for the years ending December 31, 2017 and 2016.

ESOP

Effective January 1, 2012, the Company adopted the ESOP covering all employees that meet certain age and service requirements. Plan assets are held and managed by the Company. Shares of the Company’s common stock purchased by the ESOP are held in a suspense account until released for allocation to participants. Shares released are allocated to each eligible participant based on the participant’s 401(k) contribution made during that year. Compensation expense is measured based upon the expected amount of the Company’s discretionary contribution that is determined on an annual basis and is accrued ratably over the year. Shares are committed to be released to settle the liability upon formal declaration of the contribution at the end of the year. The number of shares released to settle the liability is based upon fair value of the shares and become outstanding shares for earnings per share computations. The cost of shares issued to the ESOP, but not yet committed to be released, is shown as a reduction of stockholders’ equity. To the extent that the fair value of the ESOP shares differs from the cost of such shares, the difference is charged or credited to stockholders’ equity as additional paid in capital.

In January 2014, the ESOP borrowed $500 from the Company and purchased 46,082 shares of the common stock of the Company. The ESOP debt is secured by shares of the Company. The loan will be repaid from contributions to the ESOP from the Company. As the debt is repaid, shares are released from collateral and allocated to employees’ accounts. As of December 31, 2017 and 2016, the Company received a $109 debt payment from the ESOP and released 9,012 and 9,210 shares from collateral. The released shares were allocated to employee accounts. The shares pledged as collateral are reported as unearned ESOP shares in the consolidated balance sheets.

The Company issued 9,147 shares to the ESOP in June of 2015 to settle in full the 401(k) matching liability that was accrued prior to the origination of the $500 loan to the ESOP in January 2014.

Compensation expense attributed to the ESOP contributions recorded in the accompanying consolidated statements of income for years ended December 31, 2017, 2016 and 2015 was approximately $240, $204 and $154, respectively.

The following is a summary of the ESOP shares as of December 31, 2017 and December 31, 2016.



	December 31, 2017		December 31, 2016
Allocated shares	53,269		44,257
Unearned shares	9,771		18,783
Total ESOP shares	63,040		63,040
Fair value of unearned shares	$	256	$	502

Stock and Incentive Plans

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock and Incentive Plans

2010 Stock Option and Equity Incentive Plan

In 2010, the Company adopted the 2010 Stock Option and Equity Incentive Plan (the “2010 Incentive Plan”), which the Company’s shareholders approved in 2011. The maximum number of shares of common stock that may be issued pursuant to grants or options under the 2010 Incentive Plan is 1,000,000. The 2010 Incentive Plan is administered by the Board of Directors and provides for both the direct award of stock and the grant of stock options to eligible directors, officers, employees and outside consultants of the Company or its affiliates as defined in the 2010 Incentive Plan. The Company may grant either incentive stock options or nonqualified stock options as directed in the 2010 Incentive Plan.

The Board authorized that the 2010 Incentive Plan provide for the award of 100,000 shares of direct stock awards (restricted shares) and 900,000 shares of stock options, of which 500,000 shares are performance-based stock options. Options are generally granted with an exercise price equal to the market price of the Company’s stock at the date of the grant; those option awards generally vest based on 5 years of continuous service and have 10-year contractual terms for non-controlling participants as defined by the 2010 Incentive Plan, and forfeiture of unexercised options upon termination of employment with the Company. Other grant terms can vary for controlling participants as defined by the 2010 Incentive Plan. Restricted share awards generally vest after 4 years of continuous service. The terms of the 2010 Incentive Plan include a provision whereby all unearned non-performance options and restricted shares become immediately exercisable and fully vested upon a change in control.

With the adoption of the 2014 Omnibus Plan, which is discussed below, the Company does not plan to award any additional grants or options under the 2010 Incentive Plan.

During the years ending December 31, 2017 , 2016, and 2015, the Company did not award any restricted stock units, non-performance based stock options or performance-based stock options under the 2010 Incentive Plan.

A summary of option activity under the 2010 Incentive Plan at December 31, 2017, 2016, and 2015 and changes during the years then ended is presented below:



	2010 Incentive Plan
	Nonperformance-based stock options
	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2014	352,500		$	10.14	6.58 years
Forfeited	(6,000	)	10.00
Exercised	(21,000	)	10.00			130
Outstanding at December 31, 2015 and 2016	325,500		$	10.15	4.56 years
Forfeited	(3,000	)	10.00
Exercised	(17,500	)	10.00			308
Outstanding at December 31, 2017	305,000		$	10.16	3.59 years	$	5,316
Options exercisable at December 31, 2017	298,000		$	10.12	3.53 years	$	5,206

As of December 31, 2017, 2016, 2015, there was approximately $8, $21, and $51, respectively, of unrecognized compensation expense related to non-performance-based stock options. The unrecognized compensation expense as of December 31, 2017 is expected to be recognized over the remaining weighted average requisite service period of 1.25 years.

A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of December 31, 2017, 2016, and 2015 and changes during the years is presented below:



	2010 Incentive Plan
	Nonperformance-based restricted stock units
	Shares Underlying Options		Weighted Average Exercise Price
Outstanding at December 31, 2014	62,250		$	10.86
Forfeited	(2,500	)	10.17
Vested	(20,000	)	10.00
Outstanding at December 31, 2015	39,750		$	11.34
Exercised	(12,000	)	10.00
Outstanding at December 31, 2016	27,750		$	11.92
Forfeited	(2,500	)	10.85
Vested	(1,000	)	10.85
Outstanding at December 31, 2017	24,250		$	13.19

As of December 31, 2017, 2016, and 2015 there was $15, $90 and $174, respectively, of total unrecognized compensation expense related to non-vested restricted stock units.

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2010 Incentive Plan as of December 31, 2017, 2016 and 2015 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of December 31,
	2017	2016	2015
Nonperformance-based stock options exercised	488	—	9
Nonperformance-based restricted stock units vested	26	194	287

2014 Omnibus Plan

In September 2014, the Company adopted an omnibus incentive plan (the “2014 Omnibus Plan”). The purpose of the 2014 Omnibus Plan is to align the long-term financial interests of the employees, directors, consultants and other service providers with those of the shareholders, to attract and retain those employees, directors, consultants and other service providers by providing compensation opportunities that are competitive with other companies and to provide incentives to those individuals who contribute significantly to the Company’s long-term performance and growth. To accomplish these goals, the 2014 Omnibus Plan permits the issuance of shares, stock options, share appreciation rights, restricted shares, restricted share units, deferred shares, unrestricted shares and cash-based awards. The maximum number of shares of the Company’s common stock that may be issued pursuant to grants or options under the 2014 Omnibus Plan is 1,000,000.

During the year ended December 31, 2017, the Company awarded 121,125 non-performance restricted stock units, 26,398 performance based restricted and 212,983 non-performance-based stock options under the 2014 Omnibus Plan. During the year ended December 31, 2016, the Company awarded 25,060 non-performance based restricted stock units, 34,190 performance based restricted stock units, and 76,286 non-performance-based stock options under the 2014 Omnibus Plan. During the year ended December 31, 2015, the Company awarded 8,000 non-performance based restricted stock units, 25,474 performance based restricted stock units and 52,080 non-performance-based stock options under the 2014 Omnibus Plan.

The non-performance options generally vest equally over three years from the date of grant. The performance-based restricted stock units include a market condition based on the Company’s total shareholder return relative to a market index that determines the number of restricted stock units that may vest equally over a three year period from the grant date. The non-performance restricted stock units fully vest over the requisite service period generally ranging from one to five years.

Stock based compensation expense is measured based upon the fair market value of the award at the grant date and is recognized ratably over the period during which the shares are earned (the requisite service period). For the year ended December 31, 2017, compensation expense for option awards and restricted stock unity awards granted under the 2014 Omnibus Plan was approximately $503 and $1,373, respectively. For the year ended December 31, 2016, compensation expense for option awards and restricted stock unity awards granted under the 2014 Omnibus Plan was approximately $224 and $633, respectively. For the year ended December 31, 2015, compensation expense for option awards and restricted stock unity awards granted under the 2014 Omnibus Plan was approximately $83 and $326, respectively.

The fair value of each option award is estimated on the grant date using the Black-Scholes option-pricing model with the following assumptions used for the grants:



	For the Year Ended December 31,
	2017		2016		2015
Dividend yield	—	%	—	%	—	%
Expected life	6.13 to 7.5 years		5.0 to 6.5 years		6.0 to 6.5 years
Expected volatility	30.56% to 33.19%		33.37% to 37.55%		37.00% to 37.55%
Risk-free interest rate	1.96% to 2.32%		1.06% to 2.01%		1.76% to 1.81%

The expected life is based on the expected amount of time that options granted are expected to be outstanding. The dividend yield assumption is based on the Company’s history. The expected volatility is based on historical volatility of the Company as well as the volatility of certain comparable public company peers. The risk-free interest rates are based upon yields of U.S. Treasury issues with a term equal to the expected life of the option being valued.

A summary of the status of the Company’s options under the 2014 Omnibus Plan as of December 31, 2017, 2016, and 2015 changes during the year then ended, is as follows:



	2014 Omnibus Plan
	Nonperformance-based stock options
	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2014	—		$	—	—
Granted	52,080		14.35
Outstanding at December 31, 2015	52,080		$	14.35	9.12 years
Granted	76,286		15.98
Outstanding at December 31, 2016	128,366		$	15.32	8.69 years
Granted	212,983		26.97
Forfeited	(9,082	)	19.45
Exercised	(1,544	)	15.00			$	19
Outstanding at December 31, 2017	330,723		$	22.71	8.86 years	$	1,614
Options exercisable at end of period	51,821		$	15.01	7.49 years	$	652
Weighted average fair value of options granted during the period			$	9.88

As of December 31, 2017, 2016, and 2015 there was $1,958, $425 and $187 of total unrecognized compensation expense related to stock options awarded under the 2014 Omnibus Plan, respectively.

A summary of the status of the Company’s non-performance based restricted stock units under the 2014 Omnibus Plan as of December 31, 2017, 2016 and 2015, and changes during the year then ended is as follows:



	2014 Omnibus Plan
	Nonperformance-based restricted stock units
	Shares		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2014	82,903		$	13.00
Granted	8,000		15.58
Vested	(16,451	)	13.00
Forfeited	(3,533	)	13.00
Outstanding at December 31, 2015	70,919		$	13.29
Granted	25,060		15.83
Vested	(28,023	)	14.35
Outstanding at December 31, 2016	67,956		$	13.79
Granted	121,125		27.19
Vested	(34,342	)	19.74
Forfeited	(4,017	)	21.36
Outstanding at December 31, 2017	150,722		$	13.29

A summary of the status of the Company’s performance based restricted stock units under the 2014 Omnibus Plan as of December 31, 2017, 2016 and 2015, and changes during the years then ended is as follows:



	2014 Omnibus Plan
	Performance-based restricted stock units
	Shares		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2014	—		$	9.45
Granted	25,474		9.52
Outstanding at December 31, 2015	25,474		$	8.72
Granted	34,190		9.52
Vested	(8,467	)	14.17
Outstanding at December 31, 2016	51,197		$	8.72
Granted	26,398		24.43
Vested	(19,861	)	15.34
Forfeited	(4,140	)	17.91
Outstanding at December 31, 2017	53,594		$	8.72

As of December 31, 2017, 2016, and 2015 there was $3,592, $1,089 and $979 of total unrecognized compensation expense related to restricted stock units awarded under the 2014 Omnibus Plan, respectively.

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2014 Omnibus Plan as of December 31, 2017, 2016 and 2015 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of December 31,
	2017	2016	2015
Nonperformance-based stock options exercised	41	—	200
Nonperformance-based restricted stock units vested	568	505	267
Performance-based restricted stock units vested	530	137	—

Significant Concentrations of Credit Risk	12 Months Ended
Significant Concentrations of Credit Risk	Dec. 31, 2017
Risks and Uncertainties [Abstract]
Significant Concentrations of Credit Risk	Significant Concentrations of Credit Risk Most of the Company’s business activity is with customers located within the Dallas-Fort Worth metroplex and Houston metropolitan area. Such customers are normally also depositors of the Company. The distribution of commitments to extend credit approximates the distribution of loans outstanding. Commercial and standby letters of credit were granted primarily to commercial borrowers. The contractual amounts of credit related financial instruments such as commitments to extend credit, credit card arrangements, and letters of credit represent the amounts of potential accounting loss should the contract be fully drawn upon, the customer default, and the value of any existing collateral become worthless.

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In the ordinary course of business, the Company has and expects to continue to have transactions, including borrowings, with its employees, officers, directors and their affiliates. In the opinion of management, such transactions are on the same terms, including interest rates and collateral requirements, as those prevailing at the time for comparable transactions with unaffiliated persons. The aggregate amounts of such loans were approximately $44,134 and $27,296 as of December 31, 2017 and 2016, respectively. During the year ended December 31, 2017, new advances of approximately $34,903 were made with approximately $18,065 principal payments received. During the year ended December 31, 2016, new advances of approximately $23,469 were made with approximately $4,586 principal payments received. There were $7,191 and $9,951 in unfunded commitments to related parties as of December 31, 2017 and 2016, respectively. Deposits received from related parties as of December 31, 2017 and 2016 totaled approximately $16,023 and $25,994, respectively. As disclosed in Note 13, the Company issued $5,000 in subordinated notes to two entities controlled by a certain affiliate of the Company.

Preferred Stock	12 Months Ended
Preferred Stock	Dec. 31, 2017
Equity [Abstract]
Preferred Stock	Preferred Stock On August 25, 2011, the Company entered into a Small Business Lending Fund-Securities Purchase Agreement (“SBLF Purchase Agreement”) with the Secretary of the Treasury, pursuant to which the Company (i) sold 8,000 shares of the Company’s Senior Non-Cumulative Perpetual Preferred Stock, Series C (the “SBLF Preferred Stock”) to the Secretary of the Treasury for a purchase price of $8,000. The issuance was pursuant to the Small Business Lending Fund (“SBLF’) program, a fund established under the Small Business Jobs Act of 2010 that was created to encourage lending to small business by providing capital to qualified community banks. The SBLF Preferred Stock qualified as Tier 1 capital and paid non-cumulative dividends quarterly, on each January 1, April 1, July 1 and October 1. The dividend rate, as a percentage of the liquidation amount, can fluctuate on a quarterly basis during the first 10 quarters during which the SBLF Preferred Stock is outstanding, based upon changes in the level of “Qualified Small Business Lending” or “QBSL” (as defined in the SBLF Purchase Agreement) by the Bank. Based upon the increase in the Bank’s level of QBSL over the baseline level calculated under the terms of the SBLF Purchase Agreement, the dividend rate for the initial dividend period for the Company was set at 1.00%. For the tenth calendar quarter through 4.5 years after issuance, the dividend rate will be fixed and as of December 22, 2015 was set at 1.00% based upon the increase in QBSL as compared to the baseline. The SBLF Preferred Stock may be redeemed at any time at the Company’s option, at a redemption price of 100% of the liquidation amount of $1,000 per share plus accrued but unpaid dividends to the date of redemption for the current period, subject to the approval of its federal banking regulator. On December 22, 2015, the Company redeemed all 8,000 shares of SBLF Preferred Stock at its liquidation value of $1,000 per share plus accrued dividends for a total redemption amount of $8,018. The redemption was approved by the Company’s primary federal regulator and was funded with the Company’s surplus capital. Immediately after the redemption, the Company’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under the regulatory framework for prompt corrective action. The redemption terminated the Company’s participation in the SBLF program. In connection with the acquisition of Sovereign on August 1, 2017, the Company assumed 24,500 shares of Sovereign’s Senior Non-Cumulative Perpetual Preferred Stock, Series C, no par value (the “Sovereign SBLF Preferred Stock”), issued and outstanding immediately prior to the consummation of the acquisition. At the time of the consummation of the acquisition, each share of Sovereign SBLF Preferred Stock was converted into one share of Senior Non-Cumulative Perpetual, Series D Preferred Stock of the Company (“Veritex Series D Preferred Stock”). On August 8, 2017, the Company redeemed all 24,500 shares of the Veritex Series D Preferred Stock at its liquidation value of $1,000 per share plus accrued dividends for a total redemption amount of $24,727. The Company assumed $185 of accrued dividends in connection with the acquisition of Sovereign on August 1, 2017 out of the $227 in dividends paid in the year ended December 31, 2017. The redemption was approved by the Company’s primary federal regulator and was funded with the Company’s surplus capital. The redemption terminated the Company’s participation in the SBLF program.

Capital Requirements and Restrictions on Retained Earnings

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Capital Requirements and Restrictions on Retained Earnings

Under applicable U.S. banking laws, there are legal restrictions limiting the amount of dividends the Company can declare. Approval of the regulatory authorities is required if the effect of the dividends declared would cause regulatory capital of the Company to fall below specified minimum levels.

The Company on a consolidated basis and the Bank are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities, and certain off balance sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.

In July 2013, the Federal Reserve published final rules for the adoption of the Basel III regulatory capital framework (the “Basel III Capital Rules”). The Basel III Capital Rules, among other things, (i) introduce a new capital measure called “Common Equity Tier 1” (“CET1”), (ii) specify that Tier 1 capital consist of Common Equity Tier 1 and “Additional Tier 1 Capital” instruments meeting specified requirements, (iii) define Common Equity Tier 1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to Common Equity Tier 1 and not to the other components of capital and (iv) expand the scope of the deductions/adjustments as compared to existing regulations. The Basel III Capital Rules became effective for the Company on January 1, 2015, with certain transition provisions to be fully phased in by January 1, 2019.

Starting in January 2016, the implementation of the capital conservation buffer will be effective for the Company starting at the 0.625% level and increasing 0.625% each year thereafter, until it reaches 2.5% on January 1, 2019. The capital conservation buffer is designed to absorb losses during periods of economic stress and effectively increases the minimum required risk-weighted capital ratios.

Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, CET1 and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2017 and December 31, 2016 that the Bank met all capital adequacy requirements to which it was subject.

As of December 31, 2017 and December 31, 2016, the Company’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized”, the Company must maintain minimum total risk‑based, CET1, Tier 1 risk‑based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since December 31, 2017 that management believes have changed the Company’s category.

A comparison of the Company’s and Bank’s actual capital amounts and ratios to required capital amounts and ratios is presented in the following table:



	Actual				For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2017
Total capital (to risk-weighted assets)
Company	$	342,521	13.16	%	$	208,219	8.0	%	n/a		n/a
Bank	$	296,207	11.37	%	$	208,413	8.0	%	$	260,516	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	324,726	12.48	%	$	156,118	6.0	%	n/a		n/a
Bank	$	283,399	10.88	%	$	156,286	6.0	%	$	208,382	8.0	%
Common equity tier 1 (to risk-weighted assets)
Company	$	313,024	12.03	%	$	117,091	4.5	%	n/a		n/a
Bank	$	283,399	10.88	%	$	117,215	4.5	%	$	169,310	6.5	%
Tier 1 capital (to average assets)
Company	$	324,726	12.92	%	$	100,534	4.0	%	n/a		n/a
Bank	$	283,399	11.28	%	$	100,496	4.0	%	$	125,620	5.0	%
As of December 31, 2016
Total capital (to risk-weighted assets)
Company	$	228,566	22.02	%	$	83,039	8.0	%	n/a		n/a
Bank	$	130,237	12.55	%	$	83,020	8.0	%	$	103,775	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	215,057	20.72	%	$	62,275	6.0	%	n/a		n/a
Bank	$	121,713	11.73	%	$	62,257	6.0	%	$	83,010	8.0	%
Common equity tier 1 (to risk-weighted assets)
Company	$	211,964	20.42	%	$	46,711	4.5	%	n/a		n/a
Bank	$	121,713	11.73	%	$	46,693	4.5	%	$	67,445	6.5	%
Tier 1 capital (to average assets)
Company	$	215,057	16.82	%	$	51,143	4.0	%	n/a		n/a
Bank	$	121,713	9.52	%	$	51,140	4.0	%	$	63,925	5.0	%

- Definition

The entire disclosure for banks, savings institutions, and credit unions, for regulatory capital requirements imposed by the Federal Reserve System (FRB), the Federal Deposit Insurance Corporation (FDIC), the Office of Thrift Supervision (OTS) or for any state imposed capital requirements, as applicable. The disclosure may include (1) a description of regulatory capital requirements (a) for capital adequacy purposes and (b) established by the prompt corrective action provisions of Section 38 of the Federal Depository Insurance Act; (2) the actual or possible material effects of noncompliance with such requirements; (3) whether the entity is in compliance with the regulatory capital requirements including (a) required and actual ratios and amounts of Tier 1 leverage, Tier 1 risk-based, and total risk-based capital, tangible capital (for savings institutions), and Tier 3 capital for market risk (for certain banks and bank holding companies), (b) factors that may significantly affect capital adequacy; (4) the prompt corrective action category in which the entity was classified as of its most recent notification; (5) whether management believes any conditions or events since notification have changed the entity's category. Also may include additional information that might be disclosed in situations where substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958577-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1C
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958572-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1E
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958574-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958569-112826

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1F
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958575-112826

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1D
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958573-112826

+ Details

Business Combinations

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Business Combinations

All acquisitions were accounted for using the acquisition method of accounting. Accordingly, the assets and liabilities of the acquired entities were recorded at their estimated fair values at the acquisition date. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market willing participants at the measurement date. The Company determines the estimated fair values after review and consideration of relevant information, including discounted cash flows, quoted market prices, third party valuations, and estimates made by management. The excess of the purchase price over the estimated fair value of the net assets for tax-free acquisitions is recorded as goodwill, none of which is deductible for tax purposes. Acquisition-related costs are recognized separately from the acquisition and are expensed as incurred. The results of operations for each acquisition have been included in the Company’s consolidated financial results beginning on the respective acquisition date.

Sovereign Bancshares, Inc.

On August 1, 2017, the Company acquired Sovereign Bancshares, Inc. (“Sovereign”), a Texas corporation and parent company of Sovereign Bank. The Company issued 5,117,642 shares of its common stock and paid out $56,215 in cash to Sovereign in consideration for the acquisition. Additionally, under the terms of the merger agreement, each share of Sovereign SBLF Preferred Stock, no par value, issued and outstanding immediately prior to the effective time was converted into one share of Veritex Series D Preferred Stock. See Note 22 - Preferred Stock for additional information.

The business combination was accounted for under the acquisition method of accounting. Under this method of accounting, assets acquired and liabilities assumed are recorded at their estimated fair values. The excess cost over fair value of net assets acquired is recorded as goodwill. As the consideration paid for Sovereign exceeded the provisional value of the net assets acquired, goodwill of $109,091 was recorded related to the acquisition. This goodwill resulted from the combination of expected operational synergies and increased market share in the Dallas-Fort Worth metroplex and Houston metropolitan area. Goodwill is not tax deductible.

Fair Value

The measurement period for the Company to determine the fair values of acquired identifiable assets and assumed liabilities will end at the earlier of (i) twelve months from the date of the acquisition or (ii) as soon as the Company receives the information it was seeking about facts and circumstances that existed as of the acquisition date or learns that more information is not obtainable. Provisional estimates for certain PCI loans, bank premises, furniture and equipment, core deposit intangibles, goodwill and deferred taxes have been recorded for the acquisition as the Company is still waiting on final appraisals from independent third parties to complete valuations. The Company does not expect any significant differences from estimated values upon finalization of the valuations. Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows:



	Initial Estimate		Adjustments			Revised Fair Value
Assets
Cash and cash equivalents	$	44,775	$	—		$	44,775
Investment securities	166,307		—			166,307
Loans	750,856		1,594			752,450
Accrued interest receivable	3,437		(335		)	3,102
Bank premises, furniture and equipment	21,512		(3,707		)	17,805
Non-marketable equity securities	6,751		—			6,751
Other real estate owned	282		—			282
Intangible assets	8,662		(208		)	8,454
Goodwill	108,967		124			109,091
Other assets	10,331		2,817			13,148
Total assets	$	1,121,880	$	285		$	1,122,165
Liabilities
Deposits	$	809,366	$	—		$	809,366
Accounts payable and accrued expenses	5,189		1,095			6,284
Accrued interest payable and other liabilities	1,616		(810		)	806
Advances from FHLB	80,000		—			80,000
Junior subordinated debentures	8,609		—			8,609
Total liabilities	$	904,780	$	285		$	905,065

Preferred stock - series D	$	24,500	$	—		$	24,500
Total stockholders’ equity	$	24,500	$	—		$	24,500

Consideration
Market value of common stock issued	$	136,385	$	—		$	136,385
Cash paid	$	56,215	$	—		$	56,215
Total fair value of consideration	$	192,600	$	—		$	192,600

Acquisition-related Expenses

For the years ended December 31, 2017 and 2016, the Company incurred $1,731 and $195, respectively, of pre-tax merger and acquisition expenses related to the Sovereign acquisition. Acquisition expenses are included in professional fees in the consolidated statements of income.

Acquired Loans and Purchased Credit Impaired Loans

Acquired loans were recorded at fair value based on a discounted cash flow valuation methodology that considers, among other things, projected default rates, loss given defaults and recovery rates. No allowance for credit losses was carried over from Sovereign.

The following table discloses the fair value and contractual value of loans acquired from Sovereign on August 1, 2017:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	17,708	$	518,261	$	535,969
Commercial	34,507		180,722		215,229
Consumer	—		1,252		1,252
Total fair value	$	52,215	$	700,235	$	752,450
Contractual principal balance	$	67,985	$	707,071	$	775,056

The following table presents additional information about PCI loans acquired from Sovereign on August 1, 2017:



	PCI Loans
Contractually required principal and interest	$	85,000
Non-accretable difference	29,288
Cash flows expected to be collected	55,712
Accretable difference	3,497
Fair value of PCI loans	$	52,215

Intangible Assets

The following table discloses the fair value of intangible assets acquired from Sovereign on August 1, 2017:



	Gross Intangible Asset
Core deposit intangibles⁽¹⁾	$	7,703
Servicing asset⁽²⁾	317
Intangible lease assets⁽³⁾	434
	$	8,454

⁽¹⁾ The Company initially estimated a useful life of 10 years for core deposit intangibles. During the fourth quarter of 2017, the Company revised the estimated useful life of core deposit intangible to 7.7 years which will be amortized on a straight line basis.

⁽²⁾The Company initially estimated a weighted-average useful life of 6.1 years for servicing asset which will be amortized on a straight line basis.

⁽³⁾ The Company initially estimated a weighted-average useful life of 5 years for intangible lease assets which will be amortized on a straight line basis.

Advances from Federal Home Loan Bank

The Company assumed from Sovereign $80,000 in advances from the FHLB as of August 1, 2017 that matured in full from August 1, 2017 to December 31, 2017.

Redemption of Veritex Series D Preferred Stock

On August 8, 2017, the Company redeemed all 24,500 shares of the Veritex Series D Preferred Stock at its liquidation value of $1,000 per share plus accrued dividends for a total redemption amount of $24,727. The Company assumed $185 of accrued dividends in connection with the acquisition of Sovereign on August 1, 2017 out of the $227 in dividends paid in the year ended December 31, 2017. The redemption was approved by the Company’s primary federal regulator and was funded with the Company’s surplus capital. The redemption terminated the Company’s participation in the SBLF program.

Liberty Bancshares, Inc.

On December 1, 2017, the Company acquired Liberty Bancshares, Inc. (“Liberty”), a Texas corporation and parent company of Liberty Bank. The Company issued 1,449,944 shares of its common stock and paid out $25,009 in cash to Liberty in consideration for the acquisition.

The business combination was accounted for under the acquisition method of accounting. As the consideration paid for Liberty exceeded the provisional value of the net assets acquired, goodwill of $23,496 was recorded related to the acquisition. This goodwill resulted from the combination of expected operational synergies and increased market share in Tarrant County. Goodwill is not tax deductible.

Fair Value

The measurement period for the Company to determine the fair values of acquired identifiable assets and assumed liabilities will end at the earlier of (i) twelve months from the date of the acquisition or (ii) as soon as the Company receives the information it was seeking about facts and circumstances that existed as of the acquisition date or learns that more information is not obtainable. Provisional estimates for loans, bank premises, furniture and equipment, goodwill, intangible assets, accrued expenses, deposits and deferred taxes have been recorded for the acquisition, as independent valuations have not been finalized. The Company does not expect any significant differences from estimated values upon completion of the valuations. Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows:



	Initial Estimate
Assets
Cash and cash equivalents	$	57,384
Investment securities	54,137
Loans	312,608
Accrued interest receivable	1,191
Bank premises, furniture and equipment	6,145
Non-marketable equity securities	2,096
Other real estate owned	166
Intangible assets	7,519
Goodwill	23,496
Other assets	2,509
Total assets	$	467,251
Liabilities
Deposits	$	395,851
Accounts payable and accrued expenses	1,287
Accrued interest payable and other liabilities	142
Subordinated notes⁽¹⁾	4,625
Total liabilities	$	401,905

Consideration
Market value of common stock issued	$	40,337
Cash paid	$	25,009
Total fair value of consideration	$	65,346

⁽¹⁾The subordinated note was paid off in full on December 1, 2017, subsequent to closing.

Acquisition-related Expenses

For the year ended December 31, 2017, the Company incurred $960 of pre-tax merger and acquisition expenses related to the Liberty acquisition. The Company incurred no acquisition expenses related to the Liberty acquisition in 2016. Acquisition expenses are included in professional fees in the consolidated statements of income.

Acquired Loans and Purchased Credit Impaired Loans

The Company has identified certain acquired loans as PCI. PCI loan identification considers payment history and past due status, debt service coverage, loan grading, collateral values and other factors that may indicate deterioration of credit quality since origination. Accretion of purchase discounts on PCI loans is based on estimated future cash flows, regardless of contractual maturities, that include undiscounted expected principal and interest payments and use credit risk, interest rate and prepayment risk models to incorporate management’s best estimate of current key assumptions such as default rates, loss severity and payment speeds. Accretion of purchase discounts on acquired non-impaired loans will be recognized on a level-yield basis based on contractual maturity of individual loans per ASC 310-20.

The following table discloses the fair value and contractual value of loans acquired from Liberty on December 1, 2017:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	868	$	257,026	$	257,894
Commercial	307		49,660		49,967
Consumer	—		4,747		4,747
Total fair value	1,175		311,433		312,608
Contractual principal balance	$	1,748	$	316,119	$	317,867

The following table presents additional information about PCI loans acquired from Liberty on December 1, 2017:



	PCI Loans
Contractually required principal and interest	$	2,316
Non-accretable difference	711
Cash flows expected to be collected	1,605
Accretable difference	430
Fair value of PCI loans	$	1,175

Intangible Assets

The acquisition also resulted in a core deposit intangible of $7,519, which will be amortized on an accelerated basis over the estimated life, currently expected to be 10 years.

Pro Forma Information (unaudited)

The following table presents unaudited supplemental pro forma financial information for the years ended December 31, 2017 and 2016 as if the Sovereign and Liberty acquisitions had occurred on January 1, 2016. The pro forma information includes adjustments for interest income on loans acquired, depreciation expense on property acquired, amortization of intangibles arising from the transaction, merger and acquisition costs incurred by the Company in 2017 to be reflected as incurred in 2016, merger and acquisition costs incurred by Sovereign and Liberty prior to the acquisition close date and the related income tax effects. The pro forma financial information is not necessarily indicative of the results of operations that would have occurred had the transactions been completed on the assumed date.



	Year Ended December 31,
	2017		2016
Net interest income	$	102,440	$	98,701
Net income available to common stockholders	22,270		26,984

Basic earnings per share	$	0.98	$	1.55
Diluted earnings per share	0.96		1.53

The following net interest income and net income available to common stockholders for the Sovereign and Liberty transactions are included in the Company’s operating results for the year ended December 31, 2017.



	Year Ended December 31,
	2017
Net interest income	$	14,825
Net income available to common stockholders	4,615

Deferred Taxes Related to Business Combinations

Due to the provisional estimates used for the Sovereign and Liberty acquisitions as indicated above, the Company has made a reasonable estimate related to amounts recorded for the re-measurement of deferred taxes acquired in accordance with SAB 118. These estimates may be refined in future periods as the valuation of all assets and liabilities acquired in acquisitions are finalized and recorded.

Branch Assets and Liabilities Held For Sale

12 Months Ended

Dec. 31, 2017

Discontinued Operations and Disposal Groups [Abstract]

Branch Assets and Liabilities Held For Sale

Branch Assets and Liabilities Held for Sale

On October 23, 2017, the Company entered into a Purchase and Assumption Agreement to sell certain assets and liabilities associated with two branch locations in the Austin metropolitan market. On January 1, 2018, the Company completed the sale of these assets and liabilities to Horizon Bank, SSB. The Company determined that this transaction met the criteria for held for sale as of December 31, 2017. The completion of this sale resulted in the Company exiting the Austin metropolitan market.

Additionally, in the fourth quarter of 2017, the Company ceased using one of our Dallas, Texas branch buildings. The Company entered into an agreement to sell the property in January 2018 and expects to close the sale in the first six months of 2018. The associated building and improvements are included in branch assets held for sale as of December 31, 2017.

The following table presents the assets and liabilities held for sale as of December 31, 2017.



	December 31, 2017
Assets
Cash and cash equivalents	$	334
Loans	26,313
Accrued interest receivable	63
Bank premises, furniture and equipment	5,118
Intangible assets	1,724
Total assets	$	33,552
Liabilities
Deposits	$	64,282
Accounts payable and accrued expenses	2
Deferred tax liability	327
Accrued interest payable and other liabilities	16
Total liabilities	$	64,627

Parent Company Only Financial Statements

12 Months Ended

Dec. 31, 2017

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Parent Company Only Financial Statements

The following balance sheets, statements of income and statements of cash flows for Veritex Holdings, Inc. should be read in conjunction with the consolidated financial statements and the notes thereto.

Balance Sheet



	December 31,
	2017			2016
Assets
Cash and cash equivalents	$	46,724		$	98,366
Investment in subsidiaries	459,654			148,921
Other assets	2,267			438
Total assets	$	508,645		$	247,725
Liabilities and Stockholders’ Equity
Other liabilities	$	3,027		$	602
Other borrowings	16,689			8,035
Total liabilities	19,716			8,637
Stockholders’ equity
Preferred stock	—			—
Common stock	241			152
Additional paid-in capital	445,517			211,173
Retained earnings	44,627			29,290
Unallocated employee stock ownership plan shares	(106		)	(209		)
Accumulated other comprehensive income	(1,280		)	(1,248		)
Treasury stock	(70		)	(70		)
Total stockholders’ equity	488,929			239,088
Total liabilities and stockholders’ equity	$	508,645		$	247,725

Statements of Income



	Year Ended December 31,
	2017			2016			2015
Interest income:
Other	$	8		$	2		$	2
Interest expense:
Interest on borrowings	598			388			376
Net interest expense	(590		)	(386		)	(374		)
Noninterest expense:
Salaries and employee benefits	712			161			161
Professional fees	2,256			828			799
Other	—			1			2
Total noninterest expense	2,968			990			962
Loss before income tax benefit and equity in undistributed income of subsidiaries	(3,558		)	(1,376		)	(1,336		)
Income tax benefit	(730		)	(480		)	(454		)
Loss before equity in undistributed income of subsidiaries	(2,828		)	(896		)	(882		)
Equity in undistributed income of bank	17,980			13,447			9,672
Net income	$	15,152		$	12,551		$	8,790

Statements of Cash Flows



	Year Ended December 31,
	2017			2016			2015
Cash flows from operating activities:
Net income	$	15,152		$	12,551		$	8,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of debt costs	45			8			2
Equity in undistributed net income of Bank	(17,980		)	(13,447		)	(9,672		)
Decrease (increase) in other assets	3,523			(155		)	9
Increase (decrease) in other liabilities	1,353			270			(144		)
Net cash provided by (used in) operating activities	2,093			(773		)	(1,015		)
Cash flows from investing activities:
Net cash paid in Sovereign acquisition	(55,949		)	—			—
Net cash paid in Liberty acquisition	(24,812		)	—			—
Net cash paid in IBT acquisition	—			—			(3,841		)
Capital investment in subsidiary	—			(10,000		)	—
Net cash used in investing activities	(80,761		)	(10,000		)	(3,841		)
Cash flows from financing activities:
Net proceeds from sale of common stock in public offering	56,681			94,518			—
Redemption of preferred stock	(24,500		)	—			—
Net change in other borrowings	(4,625		)	—			—
Proceeds from exercise of employee stock options	175			—			210
Redemption of SBLF preferred stock series C	—			—			(8,000		)
Proceeds from payments on ESOP loan	109			109			109
Offering costs paid in connection with acquisition	(772		)	—			(252		)
Dividends paid on preferred stock	(42		)	—			(98		)
Net cash provided by (used in) financing activities	27,026			94,627			(8,031		)
Net (decrease) increase in cash and cash equivalents	(51,642		)	83,854			(12,887		)
Cash and cash equivalents at beginning of year	98,366			14,512			27,399
Cash and cash equivalents at end of year	$	46,724		$	98,366		$	14,512

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

+ References + Details

Summary Of Quarterly Financial Information

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Statements (Unaudited)

The following quarterly information is unaudited. However, in the opinion of management, the information reflects all adjustments, which are necessary for the fair presentation of the results of operations, for the periods presented.



	2017
	Fourth Quarter ⁽¹⁾		Third Quarter ⁽¹⁾		Second Quarter		First Quarter
Interest Income	$	29,897	$	22,279	$	14,307	$	13,069
Interest Expense	4,147		3,150		1,931		1,816
Net interest income	25,750		19,129		12,376		11,253
Provision for loan losses	2,529		752		943		890
Noninterest income	2,298		1,977		1,766		1,535
Noninterest expense	15,035		12,522		7,782		7,450
Provision for income taxes	7,227		2,650		1,802		1,350
Net income	3,257		5,182		3,615		3,098
Less income available to common stockholders	—		42		—		—
Net income available to common stockholders	$	3,257	$	5,140	$	3,615	$	3,098
Earnings per share:
Basic	$	0.14	$	0.26	$	0.24	$	0.20
Diluted	0.14		0.25		0.23		0.20

⁽¹⁾ These results include the addition of Sovereign upon acquisition during the third quarter.



	2016
	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Interest Income	$	12,281	$	12,054	$	11,477	$	10,783
Interest Expense	1,761		1,537		1,249		1,093
Net interest income	10,520		10,517		10,228		9,690
Provision for loan losses	440		238		527		845
Noninterest income	1,825		1,893		1,412		1,373
Noninterest expense	7,085		7,029		6,301		5,975
Provision for income taxes	1,630		1,768		1,639		1,430
Net income	3,190		3,375		3,173		2,813
Less income available to common stockholders	—		—		—		—
Net income available to common stockholders	$	3,190	$	3,375	$	3,173	$	2,813
Earnings per share:
Basic	$	0.28	$	0.32	$	0.30	$	0.26
Diluted	0.27		0.31		0.29		0.26

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounting Standards Codification

Segment Reporting

Reclassifications

Use of Estimates

Cash and Cash Equivalents

For the purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold.

Restrictions on cash

Restrictions on Cash

The Bank is required to maintain regulatory reserve balances with the Federal Reserve Bank.

Investment Securities

Loans Held for Sale

Loans and Allowance for Loan Losses

The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries).

Certain Acquired Loans

Loans to which ASC 310-30 accounting is applied are deemed purchased credit impaired (“PCI”) loans. Revolving loans, including lines of credit, are excluded from PCI loan accounting.

Transfers of Financial Assets

Bank Premises and Equipment



Buildings and improvements	10 - 40 years
Site improvements	15 years
Tenant improvements	Lease term
Leasehold improvements	Lease term
Furniture and equipment	3 - 10 years

Non-Marketable Equity Securities

Other Real Estate Owned

Bank-Owned Life Insurance

Goodwill and Intangible Assets



Core deposit intangible	7 - 10 years
Operating lease intangible	Lease term
In-place lease intangible	Lease term

Servicing Assets

Branch Assets and Liabilities Held For Sale

Branch Assets and Liabilities Held for Sale

Marketing Expense

The Company expenses all marketing costs as they are incurred.

Income Taxes

The Company files a consolidated income tax return with its subsidiary. Federal income tax expense or benefit is allocated on a separate return basis.

Fair Values of Financial Instruments

Stock Based Compensation

Treasury Stock

Treasury stock is stated at cost, which is determined by the first-in, first-out method.

Comprehensive Income

Employee Stock Ownership Plan

Business Combinations

Earnings Per Share

Earnings per share (“EPS”) are based upon the weighted-average shares outstanding.

Recent Accounting Pronouncements

ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” (“ASU 2018-02”), issued in February 2018, provides for the reclassification of the effect of remeasuring deferred tax balances related to items within AOCI to retained earnings resulting from the Tax Act. The Company early adopted ASU No. 2018-02 in the fourth quarter of 2017. As a result, the Company reclassified $227 from AOCI to retained earnings.

ASU 2017-04 “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”) eliminates Step 2 from the goodwill impairment test. In addition, the amendment eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. For public companies, ASU 2017-04 is effective for fiscal years beginning after December 15, 2019 with early adoption permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is in process of evaluating the impact of this pronouncement, which is not expected to have a significant impact on the consolidated financial statements.

ASU 2017-01 “Business Combinations (Topic 805): Clarifying the Definition of a Business” (“ASU 2017-01”) changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is deemed to be a business. Determining whether a transferred set constitutes a business is important because the accounting for a business combination differs from that of an asset acquisition. The definition of a business also affects the accounting for dispositions. Under the new standard, when substantially all of the fair value of assets acquired is concentrated in a single asset, or a group of similar assets, the assets acquired would not represent a business and business combination accounting would not be required. The new standard may result in more transactions being accounted for as asset acquisitions rather than business combinations. For public companies, ASU 2017-01 is effective for interim and annual periods beginning after December 15, 2017 and shall be applied prospectively. The Company early adopted ASU 2017-01 as of July 1, 2017 and the new definition is used for accounting purposes.

ASU 2016-18 “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”) requires that the statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. For public companies, ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The Company determined the adoption of ASU 2016-18 will not have a significant impact on the consolidated financial statements.

ASU 2016-13 “Financial Instruments —Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”) amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, Topic 326 eliminates the probable initial recognition threshold in current GAAP and, instead, requires an entity to reflect its current estimate of all expected credit losses. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets to present the net amount expected to be collected. For available for sale debt securities, credit losses should be measured in a manner similar to current GAAP, however Topic 326 will require that credit losses be presented as an allowance rather than as a write-down. ASU 2016-13 affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments affect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For public business entities, ASU 2016-13 is effective for financial statements issued for fiscal years beginning after December 15, 2019, and interim periods therein. The Company is continuing to evaluate the impact of the adoption of ASU 2016-13 and is uncertain of the impact on the consolidated financial statements at this point in time.

ASU 2016-09 “Compensation —Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”) simplifies several aspects of the accounting for employee share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Per ASU 2016-09: (1) all excess tax benefits and tax deficiencies should be recognized as income tax expense or benefit in the income statement, rather than in additional paid-in capital under current guidance; (2) excess tax benefits should be classified along with other income tax cash flows as an operating activity on the statement of cash flows, rather than as a separate cash inflow from financing activities and cash outflow from operating activities under current guidance; (3) cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity; and (4) an entity can make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest, as under current guidance, or account for forfeitures when they occur. For public business entities, ASU 2016-09 is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods therein.

Effective January 1, 2017, the Company adopted ASU 2016-09. The Company prospectively applied the guidance for the presentation of excess tax benefits as an operating cash flow and included the $268 excess income tax benefit as an operating activity on the consolidated statement of cash flows for the year ended December 31, 2017. In addition, the Company retrospectively applied the guidance for the presentation of the cash paid by an employer when directly withholding shares for tax-withholding purposes be classified as a financing activity on the consolidated statement of cash flows for the years ended December 31, 2017, 2016 and 2015. Finally, the Company elected to account for forfeitures as they occur.

ASU 2016-02 “Leases (Topic 842)” (“ASU 2016-02”) is intended to improve the reporting of leasing transactions to provide users of financial statements with more decision-useful information. ASU 2016-02 will require organizations that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is in process of evaluating the impact of this pronouncement, which is not expected to have a significant impact on the consolidated financial statements.

ASU 2016-01 “Financial Instruments─Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”) amends certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. ASU 2016-01, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (vii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. This update will be effective for the Company on January 1, 2018. The Company does not expect the adoption of ASU 2016-01 to have a significant impact on the consolidated financial statements.

ASU 2014-09 “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”) implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. The original effective date for ASU 2014-09 was for annual and interim periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU 2015-14, which deferred the effective date by one year, therefore it is now effective for interim and annual reporting periods beginning after December 15, 2017. Our revenue is comprised of interest income on financial assets, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. We have completed our evaluation of the impact of ASU 2014-09 on components of our non-interest income and have not found any significant changes to our methodology of recognizing revenue. As required by ASU 2014-09, we will adopt the standard in the first quarter of 2018 and, at the time of this filing, there will be no cumulative effect adjustment to opening retained earnings. We will include newly applicable revenue disclosures in our Form 10-Q for the quarter ended March 31, 2018.

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Estimated Lives of the Respective Assets



Buildings and improvements	10 - 40 years
Site improvements	15 years
Tenant improvements	Lease term
Leasehold improvements	Lease term
Furniture and equipment	3 - 10 years

Schedule of Intangible Assets



Core deposit intangible	7 - 10 years
Operating lease intangible	Lease term
In-place lease intangible	Lease term

Intangible assets in the accompanying consolidated balance sheets are summarized as follows:



	December 31, 2017
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	8.7 years	$	17,007	$	2,694	$	14,313
Servicing asset	6.8 years	1,621		406		1,215
Intangible lease assets	3.3 years	5,281		368		4,913
		$	23,909	$	3,468	$	20,441



	December 31, 2016
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	6.2 years	$	3,459	$	1,914	$	1,545
Servicing asset	7.9 years	814		213		601
Other intangible assets	4.3 years	106		71		35
		$	4,379	$	2,198	$	2,181

Schedule of Reconciliation Between Weighted Average Shares Used for Calculating Basic and Diluted EPS

The table below sets forth the reconciliation between weighted average shares used for calculating basic and diluted EPS for the years ended December 31, 2017, 2016 and 2015.



	Year Ended December 31,
	2017		2016		2015
Earnings (numerator)
Net income	$	15,152	$	12,551	$	8,790
Less: preferred stock dividends	42		—		98
Net income allocated to common stockholders	$	15,110	$	12,551	$	8,692
Shares (denominator)
Weighted average shares outstanding for basic EPS (thousands)	18,404		10,849		10,061
Dilutive effect of employee stock-based awards	406		209		271
Adjusted weighted average shares outstanding	18,810		11,058		10,332
Earnings per share:
Basic	$	0.82	$	1.16	$	0.86
Diluted	$	0.80	$	1.13	$	0.84

Supplemental Statement of Cash Flows (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of Other Supplemental Cash Flow Information

Other supplemental cash flow information is presented below:



	Year Ended December 31,
	2017		2016		2015
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	10,680	$	5,607	$	3,520
Cash paid for income taxes	$	9,761	$	8,250	$	4,100
Supplemental Disclosures of Non-Cash Flow Information:
Issuance of stock to ESOP	$	—	$	—	$	110
Net issuance of common stock for vesting of restricted stock units	$	312	$	175	$	159
Net foreclosure of other real estate owned	$	1,037	$	283	$	493
Transfers to assets held for sale	$	33,552	$	—	$	—
Transfers to liabilities held for sale	$	64,627	$	—	$	—

Schedule of Supplemental Noncash Investing Activities



	Year Ended December 31,
	2017		2016		2015
Noncash assets acquired
Investment securities	$	220,444	$	—	$	5,436
Loans	1,065,058		—		88,459
Accrued interest receivable	4,293		—		250
Bank premises, furniture and equipment	23,950		—		4,947
Non-marketable equity securities	8,847		—		—
Other real estate owned	448		—		—
Intangible assets	15,973		—		1,078
Goodwill	132,587		—		7,717
Other assets	15,657		—		1,347
Total assets	$	1,487,257	$	—	$	109,234
Noncash liabilities assumed:
Deposits	$	1,205,217	$	—	$	97,426
Accounts payable and accrued expenses⁽¹⁾	7,571		—
Accrued interest payable and other liabilities	948		—		824
Advances from FHLB	80,000				3,503
Other borrowings	13,234		—		926
Total liabilities	$	1,306,970	$	—	$	102,679
Non-cash equity assumed
Preferred stock - series D	$	24,500	$	—	$	—
Total equity assumed	$	24,500	$	—	$	—
5,117,642 shares of common stock exchanged in connection with the Sovereign acquisition	$	136,385	$	—	$	—
1,449,944 shares of common stock exchanged in connection with the Liberty acquisition	$	40,337	$	—
1,185,067 shares of common stock exchanged in connection with the IBT acquisition	$	—	$	—	$	17,705

⁽¹⁾ Accounts payable and accrued expenses includes accrued preferred stock dividends of $185.

Investment Securities (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Carrying Amount and Approximate Fair Values of Available-For-Sale Securities

The amortized cost, related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss), and fair value of securities are as follows:



	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Available for Sale
U.S. government agencies	$	10,829	$	9	$	18	$	10,820
Corporate bonds	17,500		330		—		17,830
Municipal securities	55,499		189		211		55,477
Mortgage-backed securities	91,734		58		1,068		90,724
Collateralized mortgage obligations	53,559		9		925		52,643
Asset-backed securities	616		7		—		623
	$	229,737	$	602	$	2,222	$	228,117



	December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Available for Sale
U.S. government agencies	$	732	$	—	$	36	$	696
Municipal securities	14,540		2		500		14,042
Mortgage-backed securities	49,907		83		871		49,119
Collateralized mortgage obligations	38,507		32		612		37,927
Asset-backed securities	764		11		—		775
	$	104,450	$	128	$	2,019	$	102,559

Schedule of Investment Securities That Have Been in a Continuous Unrealized Loss Position



	December 31, 2017
	Less Than 12 Months				12 Months or More				Totals
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Available for Sale
U.S. government agencies	$	3,470	$	4	$	629	$	14	$	4,099	$	18
Municipal securities	14,593		79		7,092		132		21,685		211
Mortgage-backed securities	52,075		513		29,485		555		81,560		1,068
Collateralized mortgage obligations	31,581		395		20,305		530		51,886		925
	$	101,719	$	991	$	57,511	$	1,231	$	159,230	$	2,222



	December 31, 2016
	Less Than 12 Months				12 Months or More				Totals
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Available for Sale
U.S. government agencies	$	—	$	—	$	696	$	36	$	696	$	36
Municipal securities	12,060		478		518		22		12,578		500
Mortgage-backed securities	37,274		802		6,848		69		44,122		871
Collateralized mortgage obligations	29,618		584		1,618		28		31,236		612
	$	78,952	$	1,864	$	9,680	$	155	$	88,632	$	2,019

Schedule of Amortized Costs and Estimated Fair Values of Securities Available-For-Sale, by Contractual Maturity

Therefore, these securities are not included in the maturity categories below.



	December 31, 2017
	Available For Sale
	Amortized		Fair
	Cost		Value
Due in one year or less	$	2,328	$	2,330
Due from one year to five years	29,654		29,991
Due from five years to ten years	34,480		34,474
Due after ten years	17,366		17,332
	83,828		84,127
Mortgage-backed securities	91,734		90,724
Collateralized mortgage obligations	53,559		52,643
Asset-backed securities	616		623
	$	229,737	$	228,117



	December 31, 2016
	Available For Sale
	Amortized		Fair
	Cost		Value
Due in one year or less	$	—	$	—
Due from one year to five years	4,009		3,974
Due from five years to ten years	3,522		3,346
Due after ten years	7,741		7,418
	15,272		14,738
Mortgage-backed securities	49,907		49,119
Collateralized mortgage obligations	38,507		37,927
Asset-backed securities	764		775
	$	104,450	$	102,559

Schedule of Proceeds From Sales of Investment Securities Available-For-Sale and Gross Gains and Losses

Proceeds from sales of investment securities available for sale and gross gains and losses for the years ended December 31, 2017, 2016 and 2015 were as follows:



	December 31,
	2017		2016		2015
Proceeds from sales	$	159,869	$	8,378	$	3,779
Gross realized gains	398		43		42
Gross realized losses	176		40		35

Loans and Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Summary of Loans

Loans in the accompanying consolidated balance sheets are summarized as follows:



	December 31,			December 31,
	2017			2016
Real estate:
Construction and land	$	277,825		$	162,614
Farmland	9,385			8,262
1 - 4 family residential	251,665			140,137
Multi-family residential	91,152			14,683
Commercial Real Estate	909,292			370,696
Commercial	684,551			291,416
Consumer	9,648			4,089
	2,233,518			991,897
Deferred loan fees	(28		)	(55		)
Allowance for loan losses	(12,808		)	(8,524		)
	$	2,220,682		$	983,318

The carrying amount of PCI loans for the year ended December 31, 2016 was minimal and has been excluded from the table below.



	Year Ended December 31, 2017
Carrying amount	$	47,612
Outstanding balance	63,940



	Year Ended December 31, 2017
Balance at beginning of period	$	—
Additions through acquisitions	3,927
Accretion	(1,204		)
Balance at year-end	$	2,723

Schedule of Non-Accrual Loans, Excluding Purchased Credit Impaired Loans, Aggregated By Class of Loans

Non-accrual loans aggregated by class of loans, as of December 31, 2017 and 2016, are as follows:



	December 31,		December 31,
	2017⁽¹⁾		2016
Real estate:
Construction and land	$	—	$	—
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial Real Estate	61		—
Commercial	398		930
Consumer	6		11
	$	465	$	941

⁽¹⁾Excludes PCI loans. PCI loans are generally reported as accrual loans unless significant concerns exist related to the predictability of the timing and amount of future cash flows.

Schedule of Age Analysis of Past Due Loans, Excluding Purchased Credit Impaired Loans, Aggregated by Class of Loans

An age analysis of past due loans, aggregated by class of loans, as of December 31, 2017 and 2016 is as follows:



	December 31, 2017
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current⁽¹⁾		Total Loans		Total 90 Days Past Due and Still Accruing⁽²⁾
Real estate:
Construction and land	$	320	$	—	$	—	$	320	$	277,505	$	277,825	$	—
Farmland	104		—		—		104		9,281		9,385		—
1 - 4 family residential	1,274		139		—		1,413		250,252		251,665		—
Multi-family residential	—		—		—		—		91,152		91,152		—
Commercial Real Estate	1,830		—		—		1,830		907,462		909,292		—
Commercial	1,849		389		389		2,627		681,924		684,551		—
Consumer	39		51		18		108		9,540		9,648		18
	$	5,416	$	579	$	407	$	6,402	$	2,227,116	$	2,233,518	$	18

⁽¹⁾Includes PCI loans.

⁽²⁾ Loans 90 days past due and still accruing excludes $3.3 million of PCI loans as of December 31, 2017. No PCI loans were considered non-performing loans as of December 31, 2017.



	December 31, 2016
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due and Still Accruing
Real estate:
Construction and land	$	1,047	$	—	$	—	$	1,047	$	161,567	$	162,614	$	—
Farmland	—		—		—		—		8,262		8,262		—
1 - 4 family residential	510		214		—		724		139,413		140,137		—
Multi-family residential	—		—		—		—		14,683		14,683		—
Commercial Real Estate	—		—		754		754		369,942		370,696		754
Commercial	1,344		438		532		2,314		289,102		291,416		81
Consumer	41		—		—		41		4,048		4,089		—
	$	2,942	$	652	$	1,286	$	4,880	$	987,017	$	991,897	$	835

Summary of Impaired Loans, Including Purchased Credit Impaired Loans and Troubled Debt Restructurings



	December 31, 2017⁽¹⁾
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment YTD
Real estate:
Construction and land	$	—	$	—	$	—	$	—	$	—	$	—
Farmland	—		—		—		—		—		—
1 - 4 family residential	161		161		—		161		—		163
Multi-family residential	—		—		—		—		—		—
Commercial Real Estate	434		434		—		434		—		445
Commercial	398		282		116		398		12		499
Consumer	75		75		—		75		—		87
Total	$	1,068	$	952	$	116	$	1,068	$	12	$	1,194

⁽¹⁾Excludes PCI loans that have not experienced further deterioration in credit quality subsequent to the acquisition date.



	December 31, 2016
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment YTD
Real estate:
Construction and land	$	—	$	—	$	—	$	—	$	—	$	—
Farmland	—		—		—		—		—		—
1 - 4 family residential	164		164		—		164		—		265
Multi-family residential	—		—		—		—		—		—
Commercial Real Estate	382		382		—		382		—		440
Commercial	955		381		574		955		246		463
Consumer	92		81		11		92		4		12
Total	$	1,593	$	1,008	$	585	$	1,593	$	250	$	1,180

Schedule of Terms of Certain Loans That Were Modified as Troubled Debt Restructurings

The terms of certain loans modified as TDRs during the year ended December 31, 2016 and December 31, 2015 are summarized in the following tables:



				During the year ended December 31, 2016
				Post-Modification Outstanding Recorded Investment
	Number of Loans	Pre- Modification Outstanding Recorded Investment		Adjusted Interest Rate		Extended Maturity		Extended Maturity and Restructured Payments		Extended Maturity, Restructured Payments and Adjusted Interest Rate
Commercial	2	$	175	$	—	$	—	$	169	$	—
Consumer	1	81		—		—		81		—
Total	3	$	256	$	—	$	—	$	250	$	—



				During the year ended December 31, 2015
				Post-Modification Outstanding Recorded Investment
	Number of Loans	Pre- Modification Outstanding Recorded Investment		Adjusted Interest Rate		Extended Maturity		Extended Maturity and Restructured Payments		Extended Maturity, Restructured Payments and Adjusted Interest Rate
Commercial Real Estate	1	$	399	$	—	$	—	$	—	$	391
Commercial	1	268		—		—		246		—
Total	2	$	667	$	—	$	—	$	246	$	391

Summary of Internal Ratings of Loans, Including Purchased Credit Impaired Loans

The following tables summarize the Company’s internal ratings of its loans, including PCI loans, as of December 31, 2017 and 2016:



	December 31, 2017
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	277,186	$	639	$	—	$	—	$	—	$	277,825
Farmland	9,336		—		—		—		49		9,385
1 - 4 family residential	250,904		462		200		—		99		251,665
Multi-family residential	91,152		—		—		—		—		91,152
Commercial Real Estate	882,523		8,771		681		—		17,317		909,292
Commercial	634,796		18,337		1,155		116		30,147		684,551
Consumer	9,540		—		108		—		—		9,648
Total	$	2,155,437	$	28,209	$	2,144	$	116	$	47,612	$	2,233,518



	December 31, 2016
	Pass		Special Mention		Substandard		Doubtful		Total
Real estate:
Construction and land	$	162,614	$	—	$	—	$	—	$	162,614
Farmland	8,262		—		—		—		8,262
1 - 4 family residential	139,212		710		215		—		140,137
Multi-family residential	14,683		—		—		—		14,683
Commercial Real Estate	368,370		2,326		—		—		370,696
Commercial	289,589		686		1,034		107		291,416
Consumer	4,078		—		11		—		4,089
Total	$	986,808	$	3,722	$	1,260	$	107	$	991,897

Schedule of Analysis of the Allowance for Loan Losses

An analysis of the allowance for loan losses for the years ended December 31, 2017 , 2016 and 2015 is as follows:



	For the			For the			For the
	Year Ended			Year Ended			Year Ended
	December 31, 2017			December 31, 2016			December 31, 2015
Balance at beginning of year	$	8,524		$	6,772		$	5,981
Provision charged to earnings	5,114			2,050			868
Charge-offs	(839		)	(333		)	(140		)
Recoveries	9			35			63
Net charge-offs	(830		)	(298		)	(77		)
Balance at end of year	$	12,808		$	8,524		$	6,772

Summary of Activity in the Allowance for Loan Losses By Class of Loans

The following tables summarize the activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2017, 2016 and 2015:



	December 31, 2017
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	1,415		$	1,116		$	3,003	$	2,955		$	35		$	8,524
Provision (recapture) charged to earnings	(100		)	368			1,407		3,452			(13		)	5,114
Charge-offs	—			(11		)	—		(828		)	—			(839		)
Recoveries	—			—			—		9			—			9
Net charge-offs (recoveries)	—			(11		)	—		(819		)	—			(830		)
Balance at end of year	$	1,315		$	1,473		$	4,410	$	5,588		$	22		$	12,808

Period-end amount allocated to:
Specific reserves:	$	—		$	—		$	—	$	12		$	—		$	12
General reserves	1,315			1,473			4,410		5,576			22			12,796
Total	$	1,315		$	1,473		$	4,410	$	5,588		$	22		$	12,808



	December 31, 2016
	Real Estate
	Construction, Land and Farmland		Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	1,104	$	1,124		$	2,189	$	2,324		$	31		$	6,772
Provision (recapture) charged to earnings	311		(8		)	814		913			20			2,050
Charge-offs	—		—			—		(314		)	(19		)	(333		)
Recoveries	—		—			—		32			3			35
Net charge-offs (recoveries)	—		—			—		(282		)	(16		)	(298		)
Balance at end of year	$	1,415	$	1,116		$	3,003	$	2,955		$	35		$	8,524

Period-end amount allocated to:
Specific reserves:	$	—	$	—		$	—	$	246		$	4		$	250
General reserves	1,415		1,116			3,003		2,709			31			8,274
Total	$	1,415	$	1,116		$	3,003	$	2,955		$	35		$	8,524



	December 31, 2015
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of year	$	769		$	1,166		$	1,890	$	2,092		$	64		$	5,981
Provision (recapture) charged to earnings	383			(42		)	294		262			(29		)	868
Charge-offs	(48		)	—			—		(87		)	(5		)	(140		)
Recoveries	—			—			5		57			1			63
Net charge-offs (recoveries)	(48		)	—			5		(30		)	(4		)	(77		)
Balance at end of year	$	1,104		$	1,124		$	2,189	$	2,324		$	31		$	6,772

Period-end amount allocated to:
Specific reserves:	$	—		$	—		$	—	$	186		$	7		$	193
General reserves	1,104			1,124			2,189		2,138			24			6,579
Total	$	1,104		$	1,124		$	2,189	$	2,324		$	31		$	6,772

Schedule of Recorded Investment in Loans Related to the Balance in the Allowance for Loan Losses on the Basis of the Company's Impairment Methodology



	December 31, 2017
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	—	$	161	$	434	$	398	$	75	$	1,068
Loans collectively evaluated for impairment	287,161		342,557		891,541		654,006		9,573		2,184,838
PCI loans	49		99		17,317		30,147		—		47,612
Total	$	287,210	$	342,817	$	909,292	$	684,551	$	9,648	$	2,233,518



	December 31, 2016
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	—	$	164	$	382	$	955	$	92	$	1,593
Loans collectively evaluated for impairment	170,876		154,656		370,314		290,461		3,997		990,304
Total	$	170,876	$	154,820	$	370,696	$	291,416	$	4,089	$	991,897

Schedule of Summary of Changes in Servicing Assets

A summary of the changes in the related servicing assets are as follows:



	Year Ended December 31,
	2017			2016
Balance at beginning of year	$	601		$	426
Servicing assets acquired through acquisition	313			—
Increase from loan sales	522			365
Amortization charged to income	(193		)	(190		)
Transfer of servicing assets to held for sale	(28		)	—
Balance at year-end	$	1,215		$	601

Bank Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of Bank Premises and Equipment

Bank premises and equipment in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Building and improvements	$	35,239	$	7,673
Site improvements	140		—
Tenant improvements	744		—
Leasehold improvements	5,132		3,119
Land	33,002		6,671
Furniture, fixtures and equipment	7,588		5,106
Construction in Progress	456		365
	82,301		22,934
Less accumulated depreciation	7,050		5,521
	$	75,251	$	17,413

Non-marketable Equity Securities (Tables)

12 Months Ended

Dec. 31, 2017

Non-marketable Equity Securities.

Schedule of investments in non-marketable equity

Investments in non-marketable equity securities in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
FHLB of Dallas stock	$	6,431	$	3,846
FRB of Dallas stock	3,482		3,470
Other non-marketable equity securities	3,819		50
	$	13,732	$	7,366

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets



Core deposit intangible	7 - 10 years
Operating lease intangible	Lease term
In-place lease intangible	Lease term

Intangible assets in the accompanying consolidated balance sheets are summarized as follows:



	December 31, 2017
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	8.7 years	$	17,007	$	2,694	$	14,313
Servicing asset	6.8 years	1,621		406		1,215
Intangible lease assets	3.3 years	5,281		368		4,913
		$	23,909	$	3,468	$	20,441



	December 31, 2016
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Asset		Amortization		Asset
Core deposit intangibles	6.2 years	$	3,459	$	1,914	$	1,545
Servicing asset	7.9 years	814		213		601
Other intangible assets	4.3 years	106		71		35
		$	4,379	$	2,198	$	2,181

Schedule of the Estimated Aggregate Future Amortization Expense for Intangible Assets

The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2017 was as follows:



Year	Amount
2018	$	3,744
2019	2,981
2020	2,692
2021	2,147
2022	1,896
Thereafter	6,981
	$	20,441



	Cost		Accumulated Amortization/ Depreciation			Net Carrying Amount
Bank premises, furniture and equipment:
Building and improvements	$	19,872	$	(33	)	$	19,839
Site and tenant improvements	884		(32		)	852
Land	16,781		—			16,781
	37,537		(65		)	37,472
Intangible assets:
Intangible lease assets	4,765		(241		)	4,524

Accrued interest payable and other liabilities:
Intangible lease obligations	584		(19		)	565

Total	$	41,718	$	(287	)	$	41,431

Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Balance as of December 31, 2016	$	26,865	$	26,865
Sovereign acquisition	109,091		—
Liberty acquisition	23,496		—
Balance as of December 31, 2017	$	159,452	$	26,865

Deposits (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule Summarized of the Deposits

Deposits in the accompanying consolidated balance sheets are summarized as follows:



	December 31,
	2017		2016
Noninterest-bearing demand accounts	$	612,830	$	327,614
Interest-bearing demand accounts	187,516		69,570
Savings accounts	52,822		11,166
Limited access money market accounts	960,149		579,950
Certificates of deposit, greater than $100	419,888		115,214
Certificates of deposit, less than $100	45,425		16,116
Total	$	2,278,630	$	1,119,630

Scheduled Maturities of Certificate of Deposits

As of December 31, 2017, the scheduled maturities of certificates of deposit were as follows:



Year	Amount
2018	$	413,269
2019	37,788
2020	10,508
2021	2,120
2022	1,628
2023	—
Total	$	465,313

Advances from the Federal Home Loan Bank (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule of Contractual Maturities of FHLB Advances

Contractual maturities of FHLB advances at December 31, 2017 were as follows:



2018	$	68,000
2022	3,164
Thereafter	—
Total	$	71,164

Borrowed Funds (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Junior Subordinated Debentures and Subordinated Notes

Borrowed funds in the accompanying consolidated balance sheets are as follows:



	December 31,
	2017		2016
Junior subordinated debentures	$	11,702	$	3,093
Subordinated notes ⁽¹⁾	4,987		4,942
Federal funds purchased	15,000		—


(1)	Subordinated notes are net of discount of $13 and $15 and issuance costs of $36 and $43 as of December 31, 2017 and 2016, respectively.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Components of Provision for Income Taxes

The provision for income taxes is summarized as follows:



	Year Ended December 31,
	2017		2016			2015
Income tax expense (benefit):
Current	$	7,886	$	7,833		$	4,492
Deferred	5,143		(1,366		)	(375		)
	$	13,029	$	6,467		$	4,117

Schedule of Income Tax Expense and the Effective Tax Rates



	Year Ended December 31,
	2017			2016			2015
Federal income tax expense rate at 35% for December 31, 2017 and 2016 and 34% for December 31, 2015	$	9,863		$	6,656		$	4,388
Bank-owned life insurance	(206		)	(216		)	(208		)
Non-deductible dues and memberships	132			59			56
Non-deductible meals and entertainment	80			49			46
Excess tax benefit from stock compensation⁽¹⁾	(268		)	—			—
Deferred tax asset re-measurement due to the Tax Act⁽¹⁾	3,051			—			—
Other	377			(81		)	(165		)
Total income tax expense	$	13,029		$	6,467		$	4,117
Effective tax rate	46.2		%	34.0		%	31.9		%

⁽¹⁾Discrete tax item

Schedule of Significant Components of the Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities are as follows:



	December 31,		December 31,
	2017		2016
Deferred tax assets:
Net operating loss	$	—	$	165
Organizational costs	64		405
Allowance for loan losses	2,592		2,918
Capital loss carryforward	57		95
FHLB Borrowing	28		57
Deferred rent expenses	302		90
Restricted stock	201		182
Stock options	334		399
Accrued bonuses	22		437
Loan discounts	4,805		211
Deferred compensation	115		—
Other real estate owned	219		—
Net unrealized gain on securities available for sale	340		643
Other	137		214
Total deferred tax assets	9,216		5,816
Deferred tax liabilities:
Core deposit intangibles	3,034		541
Partnership investments	497		—
Bank premises and equipment	912		1,795
Other	163		13
Total deferred tax liabilities	4,606		2,349
Net deferred tax asset	$	4,610	$	3,467

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of minimum future rental payments under non-cancelable operating leases

As of December 31, 2017, future minimum payments receivable under non-cancelable operating leases for each of the next five years were:



Year End December 31,	Future Minimum Rentals
2018	$	1,546
2019	1,244
2020	1,076
2021	471
2022	100
Thereafter	100
Total	$	4,537

As of December 31, 2017, future minimum rental payments, exclusive of taxes and other charges, under non-cancelable operating leases for each of the next five years were:



Year End December 31,	Future Minimum Rentals
2018	$	2,349
2019	2,215
2020	1,703
2021	889
2022	691
Thereafter	2,134
Total	$	9,981

Schedule of cost, amortization, depreciation, and carrying amount

The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2017 was as follows:



Year	Amount
2018	$	3,744
2019	2,981
2020	2,692
2021	2,147
2022	1,896
Thereafter	6,981
	$	20,441



	Cost		Accumulated Amortization/ Depreciation			Net Carrying Amount
Bank premises, furniture and equipment:
Building and improvements	$	19,872	$	(33	)	$	19,839
Site and tenant improvements	884		(32		)	852
Land	16,781		—			16,781
	37,537		(65		)	37,472
Intangible assets:
Intangible lease assets	4,765		(241		)	4,524

Accrued interest payable and other liabilities:
Intangible lease obligations	584		(19		)	565

Total	$	41,718	$	(287	)	$	41,431

Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis



	Fair Value
	Measurements Using
	Level 1		Level 2		Level 3		Total
	Inputs		Inputs		Inputs		Fair Value
As of December 31, 2017
Investment securities available for sale	$	—	$	228,117	$	—	$	228,117
As of December 31, 2016
Investment securities available for sale	$	—	$	102,559	$	—	$	102,559

Schedule of Assets Measured at Fair Value on a Non-recurring Basis



	Fair Value
	Measurements Using
	Level 1		Level 2		Level 3		Total
	Inputs		Inputs		Inputs		Fair Value
As of December 31, 2017
Assets:
Impaired loans	$	—	$	—	$	116	$	116
Other real estate owned	$	—	$	—	$	449	$	449
As of December 31, 2016
Assets:
Impaired loans	$	—	$	—	$	1,593	$	1,593
Other real estate owned	$	—	$	—	$	662	$	662

Schedule of Significant Unobservable Inputs Used in the Fair Value Measurements

For Level 3 financial assets measured at fair value on a non-recurring basis as of December 31, 2017 and 2016, the significant unobservable inputs used in the fair value measurements were as follows:



December 31, 2017
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	116	Collateral Method	Adjustments for selling costs	8	%
Other real estate owned	$	449	Collateral Method	Adjustments for selling costs	8	%



December 31, 2016
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	1,593	Collateral Method	Adjustments for selling costs	8	%
Other real estate owned	$	662	Collateral Method	Adjustments for selling costs	8	%

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments

The estimated fair values and carrying values of all financial instruments under current authoritative guidance as of December 31, 2017 and 2016 were as follows:



			Fair Value
	Carrying
	Amount		Level 1		Level 2		Level 3
December 31, 2017
Financial assets:
Cash and cash equivalents	$	149,044	$	—	$	149,044	$	—
Loans held for sale	841		—		841		—
Loans	2,220,682		—		—		2,234,094
Accrued interest receivable	7,676		—		7,676		—
Bank-owned life insurance	21,476		—		21,476		—
Servicing asset	1,243		—		1,243		—
Non-marketable equity securities	13,732		—		13,732		—
Financial instruments assets held for sale	31,828		—		5,515		26,313
Financial liabilities:
Deposits	$	2,278,630	$	—	$	2,164,498	$	—
Advances from FHLB	71,164		—		70,110		—
Accrued interest payable	445		—		445		—
Junior subordinated debentures	11,702		—		11,702		—
Subordinated notes	4,987		—		4,987		—
Other borrowings	15,000		—		15,000		—
Financial instruments liabilities held for sale	64,300		—		64,300		—

December 31, 2016
Financial assets:
Cash and cash equivalents	$	234,791	$	—	$	234,791	$	—
Loans held for sale	5,208		—		5,208		—
Loans	983,318		—		—		987,021
Accrued interest receivable	2,907		—		2,907		—
Bank-owned life insurance	20,077		—		20,077		—
Servicing asset	601		—		601		—
Non-marketable equity securities	7,366		—		7,366		—
Financial liabilities:
Deposits	$	1,119,630	$	—	$	1,085,888	$	—
Advances from FHLB	38,306		—		38,570		—
Accrued interest payable	141		—		141		—
Junior subordinated debentures	3,093		—		3,093		—
Subordinated notes	4,942		—		4,942		—

Financial Instruments with Off-Balance Sheet Risk (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of the Approximate Amounts of Financial Instruments with Off-balance Sheet Risk

The following table sets forth the approximate amounts of these financial instruments as of December 31, 2017 and 2016:



	December 31,		December 31,
	2017		2016
Commitments to extend credit	$	606,451	$	236,919
Standby and commercial letters of credit	9,299		6,933
	$	615,750	$	243,852

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Summary of ESOP Shares

The following is a summary of the ESOP shares as of December 31, 2017 and December 31, 2016.



	December 31, 2017		December 31, 2016
Allocated shares	53,269		44,257
Unearned shares	9,771		18,783
Total ESOP shares	63,040		63,040
Fair value of unearned shares	$	256	$	502

Stock and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2014 Omnibus Plan as of December 31, 2017, 2016 and 2015 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of December 31,
	2017	2016	2015
Nonperformance-based stock options exercised	41	—	200
Nonperformance-based restricted stock units vested	568	505	267
Performance-based restricted stock units vested	530	137	—

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2010 Incentive Plan as of December 31, 2017, 2016 and 2015 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of December 31,
	2017	2016	2015
Nonperformance-based stock options exercised	488	—	9
Nonperformance-based restricted stock units vested	26	194	287

Summary of option activity

A summary of the status of the Company’s options under the 2014 Omnibus Plan as of December 31, 2017, 2016, and 2015 changes during the year then ended, is as follows:



	2014 Omnibus Plan
	Nonperformance-based stock options
	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2014	—		$	—	—
Granted	52,080		14.35
Outstanding at December 31, 2015	52,080		$	14.35	9.12 years
Granted	76,286		15.98
Outstanding at December 31, 2016	128,366		$	15.32	8.69 years
Granted	212,983		26.97
Forfeited	(9,082	)	19.45
Exercised	(1,544	)	15.00			$	19
Outstanding at December 31, 2017	330,723		$	22.71	8.86 years	$	1,614
Options exercisable at end of period	51,821		$	15.01	7.49 years	$	652
Weighted average fair value of options granted during the period			$	9.88

A summary of option activity under the 2010 Incentive Plan at December 31, 2017, 2016, and 2015 and changes during the years then ended is presented below:



	2010 Incentive Plan
	Nonperformance-based stock options
	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2014	352,500		$	10.14	6.58 years
Forfeited	(6,000	)	10.00
Exercised	(21,000	)	10.00			130
Outstanding at December 31, 2015 and 2016	325,500		$	10.15	4.56 years
Forfeited	(3,000	)	10.00
Exercised	(17,500	)	10.00			308
Outstanding at December 31, 2017	305,000		$	10.16	3.59 years	$	5,316
Options exercisable at December 31, 2017	298,000		$	10.12	3.53 years	$	5,206

Summary of status of the Company's restricted shares or restricted stock units



	2014 Omnibus Plan
	Nonperformance-based restricted stock units
	Shares		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2014	82,903		$	13.00
Granted	8,000		15.58
Vested	(16,451	)	13.00
Forfeited	(3,533	)	13.00
Outstanding at December 31, 2015	70,919		$	13.29
Granted	25,060		15.83
Vested	(28,023	)	14.35
Outstanding at December 31, 2016	67,956		$	13.79
Granted	121,125		27.19
Vested	(34,342	)	19.74
Forfeited	(4,017	)	21.36
Outstanding at December 31, 2017	150,722		$	13.29



	2014 Omnibus Plan
	Performance-based restricted stock units
	Shares		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2014	—		$	9.45
Granted	25,474		9.52
Outstanding at December 31, 2015	25,474		$	8.72
Granted	34,190		9.52
Vested	(8,467	)	14.17
Outstanding at December 31, 2016	51,197		$	8.72
Granted	26,398		24.43
Vested	(19,861	)	15.34
Forfeited	(4,140	)	17.91
Outstanding at December 31, 2017	53,594		$	8.72

A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of December 31, 2017, 2016, and 2015 and changes during the years is presented below:



	2010 Incentive Plan
	Nonperformance-based restricted stock units
	Shares Underlying Options		Weighted Average Exercise Price
Outstanding at December 31, 2014	62,250		$	10.86
Forfeited	(2,500	)	10.17
Vested	(20,000	)	10.00
Outstanding at December 31, 2015	39,750		$	11.34
Exercised	(12,000	)	10.00
Outstanding at December 31, 2016	27,750		$	11.92
Forfeited	(2,500	)	10.85
Vested	(1,000	)	10.85
Outstanding at December 31, 2017	24,250		$	13.19

Schedule of assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model

The fair value of each option award is estimated on the grant date using the Black-Scholes option-pricing model with the following assumptions used for the grants:



	For the Year Ended December 31,
	2017		2016		2015
Dividend yield	—	%	—	%	—	%
Expected life	6.13 to 7.5 years		5.0 to 6.5 years		6.0 to 6.5 years
Expected volatility	30.56% to 33.19%		33.37% to 37.55%		37.00% to 37.55%
Risk-free interest rate	1.96% to 2.32%		1.06% to 2.01%		1.76% to 1.81%

Capital Requirements and Restrictions on Retained Earnings (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule of Comparison of the Company's and Bank's Actual Capital Amounts and Ratios to Required Capital Amounts and Ratios

A comparison of the Company’s and Bank’s actual capital amounts and ratios to required capital amounts and ratios is presented in the following table:



	Actual				For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2017
Total capital (to risk-weighted assets)
Company	$	342,521	13.16	%	$	208,219	8.0	%	n/a		n/a
Bank	$	296,207	11.37	%	$	208,413	8.0	%	$	260,516	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	324,726	12.48	%	$	156,118	6.0	%	n/a		n/a
Bank	$	283,399	10.88	%	$	156,286	6.0	%	$	208,382	8.0	%
Common equity tier 1 (to risk-weighted assets)
Company	$	313,024	12.03	%	$	117,091	4.5	%	n/a		n/a
Bank	$	283,399	10.88	%	$	117,215	4.5	%	$	169,310	6.5	%
Tier 1 capital (to average assets)
Company	$	324,726	12.92	%	$	100,534	4.0	%	n/a		n/a
Bank	$	283,399	11.28	%	$	100,496	4.0	%	$	125,620	5.0	%
As of December 31, 2016
Total capital (to risk-weighted assets)
Company	$	228,566	22.02	%	$	83,039	8.0	%	n/a		n/a
Bank	$	130,237	12.55	%	$	83,020	8.0	%	$	103,775	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	215,057	20.72	%	$	62,275	6.0	%	n/a		n/a
Bank	$	121,713	11.73	%	$	62,257	6.0	%	$	83,010	8.0	%
Common equity tier 1 (to risk-weighted assets)
Company	$	211,964	20.42	%	$	46,711	4.5	%	n/a		n/a
Bank	$	121,713	11.73	%	$	46,693	4.5	%	$	67,445	6.5	%
Tier 1 capital (to average assets)
Company	$	215,057	16.82	%	$	51,143	4.0	%	n/a		n/a
Bank	$	121,713	9.52	%	$	51,140	4.0	%	$	63,925	5.0	%

Business Combinations (Tables)

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Schedule of Acquired Assets and Assumed Liabilities

Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows:



	Initial Estimate		Adjustments			Revised Fair Value
Assets
Cash and cash equivalents	$	44,775	$	—		$	44,775
Investment securities	166,307		—			166,307
Loans	750,856		1,594			752,450
Accrued interest receivable	3,437		(335		)	3,102
Bank premises, furniture and equipment	21,512		(3,707		)	17,805
Non-marketable equity securities	6,751		—			6,751
Other real estate owned	282		—			282
Intangible assets	8,662		(208		)	8,454
Goodwill	108,967		124			109,091
Other assets	10,331		2,817			13,148
Total assets	$	1,121,880	$	285		$	1,122,165
Liabilities
Deposits	$	809,366	$	—		$	809,366
Accounts payable and accrued expenses	5,189		1,095			6,284
Accrued interest payable and other liabilities	1,616		(810		)	806
Advances from FHLB	80,000		—			80,000
Junior subordinated debentures	8,609		—			8,609
Total liabilities	$	904,780	$	285		$	905,065

Preferred stock - series D	$	24,500	$	—		$	24,500
Total stockholders’ equity	$	24,500	$	—		$	24,500

Consideration
Market value of common stock issued	$	136,385	$	—		$	136,385
Cash paid	$	56,215	$	—		$	56,215
Total fair value of consideration	$	192,600	$	—		$	192,600

Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows:



	Initial Estimate
Assets
Cash and cash equivalents	$	57,384
Investment securities	54,137
Loans	312,608
Accrued interest receivable	1,191
Bank premises, furniture and equipment	6,145
Non-marketable equity securities	2,096
Other real estate owned	166
Intangible assets	7,519
Goodwill	23,496
Other assets	2,509
Total assets	$	467,251
Liabilities
Deposits	$	395,851
Accounts payable and accrued expenses	1,287
Accrued interest payable and other liabilities	142
Subordinated notes⁽¹⁾	4,625
Total liabilities	$	401,905

Consideration
Market value of common stock issued	$	40,337
Cash paid	$	25,009
Total fair value of consideration	$	65,346

⁽¹⁾The subordinated note was paid off in full on December 1, 2017, subsequent to closing.

Summary of Loans Acquired in a Business Combination

The following table discloses the fair value and contractual value of loans acquired from Sovereign on August 1, 2017:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	17,708	$	518,261	$	535,969
Commercial	34,507		180,722		215,229
Consumer	—		1,252		1,252
Total fair value	$	52,215	$	700,235	$	752,450
Contractual principal balance	$	67,985	$	707,071	$	775,056

The following table presents additional information about PCI loans acquired from Sovereign on August 1, 2017:



	PCI Loans
Contractually required principal and interest	$	85,000
Non-accretable difference	29,288
Cash flows expected to be collected	55,712
Accretable difference	3,497
Fair value of PCI loans	$	52,215

The following table discloses the fair value and contractual value of loans acquired from Liberty on December 1, 2017:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	868	$	257,026	$	257,894
Commercial	307		49,660		49,967
Consumer	—		4,747		4,747
Total fair value	1,175		311,433		312,608
Contractual principal balance	$	1,748	$	316,119	$	317,867

The following table presents additional information about PCI loans acquired from Liberty on December 1, 2017:



	PCI Loans
Contractually required principal and interest	$	2,316
Non-accretable difference	711
Cash flows expected to be collected	1,605
Accretable difference	430
Fair value of PCI loans	$	1,175

Summary of Finite-Lived Intangible Assets Acquired

The following table discloses the fair value of intangible assets acquired from Sovereign on August 1, 2017:



	Gross Intangible Asset
Core deposit intangibles⁽¹⁾	$	7,703
Servicing asset⁽²⁾	317
Intangible lease assets⁽³⁾	434
	$	8,454

⁽²⁾The Company initially estimated a weighted-average useful life of 6.1 years for servicing asset which will be amortized on a straight line basis.

⁽³⁾ The Company initially estimated a weighted-average useful life of 5 years for intangible lease assets which will be amortized on a straight line basis.

Summary of Pro Forma Information, Business Acquisition



	Year Ended December 31,
	2017
Net interest income	$	14,825
Net income available to common stockholders	4,615

The pro forma financial information is not necessarily indicative of the results of operations that would have occurred had the transactions been completed on the assumed date.



	Year Ended December 31,
	2017		2016
Net interest income	$	102,440	$	98,701
Net income available to common stockholders	22,270		26,984

Basic earnings per share	$	0.98	$	1.55
Diluted earnings per share	0.96		1.53

Branch Assets and Liabilities Held For Sale (Tables)

12 Months Ended

Dec. 31, 2017

Discontinued Operations and Disposal Groups [Abstract]

Summary of Branch Assets and Liabilities Held for Sale

The following table presents the assets and liabilities held for sale as of December 31, 2017.



	December 31, 2017
Assets
Cash and cash equivalents	$	334
Loans	26,313
Accrued interest receivable	63
Bank premises, furniture and equipment	5,118
Intangible assets	1,724
Total assets	$	33,552
Liabilities
Deposits	$	64,282
Accounts payable and accrued expenses	2
Deferred tax liability	327
Accrued interest payable and other liabilities	16
Total liabilities	$	64,627

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721665-107760

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1474-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721683-107760

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=84176398&loc=SL51724579-110230

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5C
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4A
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721663-107760

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721659-107760

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721671-107760

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5D
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721677-107760

+ Details

Parent Company Only Financial Statements (Tables)

12 Months Ended

Dec. 31, 2017

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Balance Sheets

Balance Sheet



	December 31,
	2017			2016
Assets
Cash and cash equivalents	$	46,724		$	98,366
Investment in subsidiaries	459,654			148,921
Other assets	2,267			438
Total assets	$	508,645		$	247,725
Liabilities and Stockholders’ Equity
Other liabilities	$	3,027		$	602
Other borrowings	16,689			8,035
Total liabilities	19,716			8,637
Stockholders’ equity
Preferred stock	—			—
Common stock	241			152
Additional paid-in capital	445,517			211,173
Retained earnings	44,627			29,290
Unallocated employee stock ownership plan shares	(106		)	(209		)
Accumulated other comprehensive income	(1,280		)	(1,248		)
Treasury stock	(70		)	(70		)
Total stockholders’ equity	488,929			239,088
Total liabilities and stockholders’ equity	$	508,645		$	247,725

Statements of Income

Statements of Cash Flows



	Year Ended December 31,
	2017			2016			2015
Cash flows from operating activities:
Net income	$	15,152		$	12,551		$	8,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of debt costs	45			8			2
Equity in undistributed net income of Bank	(17,980		)	(13,447		)	(9,672		)
Decrease (increase) in other assets	3,523			(155		)	9
Increase (decrease) in other liabilities	1,353			270			(144		)
Net cash provided by (used in) operating activities	2,093			(773		)	(1,015		)
Cash flows from investing activities:
Net cash paid in Sovereign acquisition	(55,949		)	—			—
Net cash paid in Liberty acquisition	(24,812		)	—			—
Net cash paid in IBT acquisition	—			—			(3,841		)
Capital investment in subsidiary	—			(10,000		)	—
Net cash used in investing activities	(80,761		)	(10,000		)	(3,841		)
Cash flows from financing activities:
Net proceeds from sale of common stock in public offering	56,681			94,518			—
Redemption of preferred stock	(24,500		)	—			—
Net change in other borrowings	(4,625		)	—			—
Proceeds from exercise of employee stock options	175			—			210
Redemption of SBLF preferred stock series C	—			—			(8,000		)
Proceeds from payments on ESOP loan	109			109			109
Offering costs paid in connection with acquisition	(772		)	—			(252		)
Dividends paid on preferred stock	(42		)	—			(98		)
Net cash provided by (used in) financing activities	27,026			94,627			(8,031		)
Net (decrease) increase in cash and cash equivalents	(51,642		)	83,854			(12,887		)
Cash and cash equivalents at beginning of year	98,366			14,512			27,399
Cash and cash equivalents at end of year	$	46,724		$	98,366		$	14,512

Statements of Cash Flows



	Year Ended December 31,
	2017			2016			2015
Interest income:
Other	$	8		$	2		$	2
Interest expense:
Interest on borrowings	598			388			376
Net interest expense	(590		)	(386		)	(374		)
Noninterest expense:
Salaries and employee benefits	712			161			161
Professional fees	2,256			828			799
Other	—			1			2
Total noninterest expense	2,968			990			962
Loss before income tax benefit and equity in undistributed income of subsidiaries	(3,558		)	(1,376		)	(1,336		)
Income tax benefit	(730		)	(480		)	(454		)
Loss before equity in undistributed income of subsidiaries	(2,828		)	(896		)	(882		)
Equity in undistributed income of bank	17,980			13,447			9,672
Net income	$	15,152		$	12,551		$	8,790

Statements of Cash Flows



	Year Ended December 31,
	2017			2016			2015
Cash flows from operating activities:
Net income	$	15,152		$	12,551		$	8,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of debt costs	45			8			2
Equity in undistributed net income of Bank	(17,980		)	(13,447		)	(9,672		)
Decrease (increase) in other assets	3,523			(155		)	9
Increase (decrease) in other liabilities	1,353			270			(144		)
Net cash provided by (used in) operating activities	2,093			(773		)	(1,015		)
Cash flows from investing activities:
Net cash paid in Sovereign acquisition	(55,949		)	—			—
Net cash paid in Liberty acquisition	(24,812		)	—			—
Net cash paid in IBT acquisition	—			—			(3,841		)
Capital investment in subsidiary	—			(10,000		)	—
Net cash used in investing activities	(80,761		)	(10,000		)	(3,841		)
Cash flows from financing activities:
Net proceeds from sale of common stock in public offering	56,681			94,518			—
Redemption of preferred stock	(24,500		)	—			—
Net change in other borrowings	(4,625		)	—			—
Proceeds from exercise of employee stock options	175			—			210
Redemption of SBLF preferred stock series C	—			—			(8,000		)
Proceeds from payments on ESOP loan	109			109			109
Offering costs paid in connection with acquisition	(772		)	—			(252		)
Dividends paid on preferred stock	(42		)	—			(98		)
Net cash provided by (used in) financing activities	27,026			94,627			(8,031		)
Net (decrease) increase in cash and cash equivalents	(51,642		)	83,854			(12,887		)
Cash and cash equivalents at beginning of year	98,366			14,512			27,399
Cash and cash equivalents at end of year	$	46,724		$	98,366		$	14,512

Summary Of Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information



	2017
	Fourth Quarter ⁽¹⁾		Third Quarter ⁽¹⁾		Second Quarter		First Quarter
Interest Income	$	29,897	$	22,279	$	14,307	$	13,069
Interest Expense	4,147		3,150		1,931		1,816
Net interest income	25,750		19,129		12,376		11,253
Provision for loan losses	2,529		752		943		890
Noninterest income	2,298		1,977		1,766		1,535
Noninterest expense	15,035		12,522		7,782		7,450
Provision for income taxes	7,227		2,650		1,802		1,350
Net income	3,257		5,182		3,615		3,098
Less income available to common stockholders	—		42		—		—
Net income available to common stockholders	$	3,257	$	5,140	$	3,615	$	3,098
Earnings per share:
Basic	$	0.14	$	0.26	$	0.24	$	0.20
Diluted	0.14		0.25		0.23		0.20

⁽¹⁾ These results include the addition of Sovereign upon acquisition during the third quarter.



	2016
	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Interest Income	$	12,281	$	12,054	$	11,477	$	10,783
Interest Expense	1,761		1,537		1,249		1,093
Net interest income	10,520		10,517		10,228		9,690
Provision for loan losses	440		238		527		845
Noninterest income	1,825		1,893		1,412		1,373
Noninterest expense	7,085		7,029		6,301		5,975
Provision for income taxes	1,630		1,768		1,639		1,430
Net income	3,190		3,375		3,173		2,813
Less income available to common stockholders	—		—		—		—
Net income available to common stockholders	$	3,190	$	3,375	$	3,173	$	2,813
Earnings per share:
Basic	$	0.28	$	0.32	$	0.30	$	0.26
Diluted	0.27		0.31		0.29		0.26

Summary of Significant Accounting Policies - Nature of Organization (Details)	12 Months Ended
	Dec. 31, 2017 branch
Product Information [Line Items]
Number of mortgage offices	1
Dallas-Fort Worth
Product Information [Line Items]
Number of branches	20
Houston
Product Information [Line Items]
Number of branches	1

Summary of Significant Accounting Policies - Segment Reporting (Details)	12 Months Ended
	Dec. 31, 2017 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	1

Summary of Significant Accounting Policies - Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payments to tax authorities for stock-based compensation	$ (318)	$ (175)	$ (159)
Reclassification of certain deferred tax effects	0
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain deferred tax effects	$ 227

Summary of Significant Accounting Policies - Restrictions On Cash (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Required regulatory cash reserve balances	$ 64.3	$ 26.4

Summary of Significant Accounting Policies - Investment Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other-than-temporary impairment losses reflected in earnings as realized losses	$ 0	$ 0	$ 0

Summary of Significant Accounting Policies - Bank Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2017
Site improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Minimum \| Building and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Minimum \| Furniture and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Maximum \| Building and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Maximum \| Furniture and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years

Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Impairment charges	$ 0	$ 0	$ 0
Core deposit intangibles \| Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful live	7 years
Core deposit intangibles \| Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful live	10 years

Summary of Significant Accounting Policies - Marketing Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Marketing expense	$ 1,293	$ 983	$ 799

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax asset re-measurement due to the Tax Act	$ 3,051,000	$ 0	$ 0
Penalties and interest expense	$ 0	$ 0	$ 0

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings (numerator)
Net income	$ 3,257	$ 5,182	$ 3,615	$ 3,098	$ 3,190	$ 3,375	$ 3,173	$ 2,813	$ 15,152	$ 12,551	$ 8,790
Less: preferred stock dividends	0	42	0	0	0	0	0	0	42	0	98
Net income allocated to common stockholders	$ 3,257	$ 5,140	$ 3,615	$ 3,098	$ 3,190	$ 3,375	$ 3,173	$ 2,813	$ 15,110	$ 12,551	$ 8,692
Shares (denominator)
Weighted average shares outstanding for basic EPS (thousands) (in shares)									18,404	10,849	10,061
Dilutive effect of employee stock-based awards (in shares)									406	209	271
Adjusted weighted average shares outstanding (in shares)									18,810	11,058	10,332
Earnings per share:
Basic (in dollars per share)	$ 0.14	$ 0.26	$ 0.24	$ 0.20	$ 0.28	$ 0.32	$ 0.30	$ 0.26	$ 0.82	$ 1.16	$ 0.86
Diluted (in dollars per share)	$ 0.14	$ 0.25	$ 0.23	$ 0.20	$ 0.27	$ 0.31	$ 0.29	$ 0.26	$ 0.80	$ 1.13	$ 0.84
Excluded from diluted EPS weighted average shares (in shares)									0	0	0

Supplemental Statement of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 01, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest		$ 10,680	$ 5,607	$ 3,520
Cash paid for income taxes		9,761	8,250	4,100
Supplemental Disclosures of Non-Cash Flow Information:
Issuance of stock to ESOP		0	0	110
Net issuance of common stock for vesting of restricted stock units		312	175	159
Net foreclosure of other real estate owned		1,037	283	493
Transfers to assets held for sale		33,552	0	0
Transfers to liabilities held for sale		64,627	0	0
Noncash assets acquired
Investment securities		220,444	0	5,436
Loans		1,065,058	0	88,459
Accrued interest receivable		4,293	0	250
Bank premises, furniture and equipment		23,950	0	4,947
Non-marketable equity securities		8,847	0	0
Other real estate owned		448	0
Intangible assets		15,973	0	1,078
Goodwill		132,587	0	7,717
Other assets		15,657	0	1,347
Total assets		1,487,257	0	109,234
Noncash liabilities assumed:
Deposits		1,205,217	0	97,426
Accounts payable and accrued expenses		7,571	0
Accrued interest payable and other liabilities		948	0	824
Advances from FHLB		80,000		3,503
Other borrowings		13,234	0	926
Total liabilities		1,306,970	$ 0	102,679
Market value of common stock issued				17,705
Business combination total redemption amount		49,000		$ 8,000
Accounts payable and accrued expenses		185
Shares of common stock exchanged in connection with acquisition (in shares)				1,185,067
Sovereign Bancshares, Inc.
Noncash liabilities assumed:
Market value of common stock issued		136,385
Business combination total redemption amount		$ 24,500
Shares of common stock exchanged in connection with acquisition (in shares)		5,117,642
Liberty Bancshares, Inc.
Noncash liabilities assumed:
Market value of common stock issued	$ 40,337
Shares of common stock exchanged in connection with acquisition (in shares)		1,449,944

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain deferred tax effects	$ 0
Excess tax benefit from stock compensation	(268)	$ (162)	$ 0
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of certain deferred tax effects	$ 227

Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available for Sale securities
Amortized Cost	$ 229,737	$ 104,450
Gross Unrealized Gains	602	128
Gross Unrealized Losses	2,222	2,019
Fair Value	228,117	102,559
U.S. government agencies
Available for Sale securities
Amortized Cost	10,829	732
Gross Unrealized Gains	9	0
Gross Unrealized Losses	18	36
Fair Value	10,820	696
Corporate bonds
Available for Sale securities
Amortized Cost	17,500
Gross Unrealized Gains	330
Gross Unrealized Losses	0
Fair Value	17,830
Municipal securities
Available for Sale securities
Amortized Cost	55,499	14,540
Gross Unrealized Gains	189	2
Gross Unrealized Losses	211	500
Fair Value	55,477	14,042
Mortgage-backed securities
Available for Sale securities
Amortized Cost	91,734	49,907
Gross Unrealized Gains	58	83
Gross Unrealized Losses	1,068	871
Fair Value	90,724	49,119
Collateralized mortgage obligations
Available for Sale securities
Amortized Cost	53,559	38,507
Gross Unrealized Gains	9	32
Gross Unrealized Losses	925	612
Fair Value	52,643	37,927
Asset-backed securities
Available for Sale securities
Amortized Cost	616	764
Gross Unrealized Gains	7	11
Gross Unrealized Losses	0	0
Fair Value	$ 623	$ 775

Investment Securities - Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2017 USD ($) investment	Dec. 31, 2016 USD ($) investment
Available for sale investment securities that have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	$ 101,719	$ 78,952
Less Than 12 Months, Unrealized Loss	991	1,864
12 Months or More, Fair Value	57,511	9,680
12 Months or More, Unrealized Loss	1,231	155
Total Fair Value	159,230	88,632
Total Unrealized Loss	$ 2,222	$ 2,019
Number of investment positions in an unrealized loss position \| investment	118	72
U.S. government agencies
Available for sale investment securities that have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	$ 3,470	$ 0
Less Than 12 Months, Unrealized Loss	4	0
12 Months or More, Fair Value	629	696
12 Months or More, Unrealized Loss	14	36
Total Fair Value	4,099	696
Total Unrealized Loss	18	36
Municipal securities
Available for sale investment securities that have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	14,593	12,060
Less Than 12 Months, Unrealized Loss	79	478
12 Months or More, Fair Value	7,092	518
12 Months or More, Unrealized Loss	132	22
Total Fair Value	21,685	12,578
Total Unrealized Loss	211	500
Mortgage-backed securities
Available for sale investment securities that have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	52,075	37,274
Less Than 12 Months, Unrealized Loss	513	802
12 Months or More, Fair Value	29,485	6,848
12 Months or More, Unrealized Loss	555	69
Total Fair Value	81,560	44,122
Total Unrealized Loss	1,068	871
Collateralized mortgage obligations
Available for sale investment securities that have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	31,581	29,618
Less Than 12 Months, Unrealized Loss	395	584
12 Months or More, Fair Value	20,305	1,618
12 Months or More, Unrealized Loss	530	28
Total Fair Value	51,886	31,236
Total Unrealized Loss	$ 925	$ 612

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amortized costs of securities available for sale, by contractual maturity
Due in one year or less	$ 2,328	$ 0
Due from one year to five years	29,654	4,009
Due from five years to ten years	34,480	3,522
Due after ten years	17,366	7,741
Total investment securities available for sale, single maturity date	83,828	15,272
Total investment securities available for sale, amortized cost basis	229,737	104,450
Estimated fair values of securities available for sale, by contractual maturity
Due in one year or less	2,330	0
Due from one year to five years	29,991	3,974
Due from five years to ten years	34,474	3,346
Due after ten years	17,332	7,418
Total investment securities available for sale	84,127	14,738
Total investment securities available for sale, fair value	228,117	102,559
Mortgage-backed securities
Amortized costs of securities available for sale, by contractual maturity
Amortized cost	91,734	49,907
Estimated fair values of securities available for sale, by contractual maturity
Fair value	90,724	49,119
Collateralized mortgage obligations
Amortized costs of securities available for sale, by contractual maturity
Amortized cost	53,559	38,507
Estimated fair values of securities available for sale, by contractual maturity
Fair value	52,643	37,927
Asset-backed securities
Amortized costs of securities available for sale, by contractual maturity
Amortized cost	616	764
Estimated fair values of securities available for sale, by contractual maturity
Fair value	$ 623	$ 775

Investment Securities - Proceeds and Gross Gains/Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available for Sale securities
Proceeds from sales	$ 159,869,000	$ 8,378,000	$ 3,779,000
Gross realized gains	398,000	43,000	42,000
Gross realized losses	176,000	40,000	35,000
Calls
Available for Sale securities
Gross realized gains (losses)	$ 0	$ 0	$ 0

Loans and Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans and Allowance for Loan Losses
Loans, gross	$ 2,233,518	$ 991,897
Deferred loan fees	(28)	(55)
Allowance for loan losses	(12,808)	(8,524)	$ (6,772)	$ (5,981)
Loans, net	2,220,682	983,318
Accretable discount related to loans acquired within a business combination	12,135	469
Discount on retained loans from SBA loan sales	1,189	832
Commercial
Loans and Allowance for Loan Losses
Loans, gross	684,551	291,416
Allowance for loan losses	(5,588)	(2,955)	(2,324)	(2,092)
Consumer
Loans and Allowance for Loan Losses
Loans, gross	9,648	4,089
Allowance for loan losses	(22)	(35)	(31)	(64)
Construction and land \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	277,825	162,614
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	9,385	8,262
Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	342,817	154,820
Allowance for loan losses	(1,473)	(1,116)	(1,124)	(1,166)
Real estate \| 1 - 4 family residential \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	251,665	140,137
Real estate \| Multi-family residential \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	$ 91,152	14,683
Commercial Real Estate
Loans and Allowance for Loan Losses
Loan amount outstanding as percentage of total risk-based capital	328.00%
Commercial Real Estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	$ 909,292	370,696
Allowance for loan losses	$ (4,410)	$ (3,003)	$ (2,189)	$ (1,890)
Construction, land development and other land loans
Loans and Allowance for Loan Losses
Loan amount outstanding as percentage of total risk-based capital	94.00%

Loans and Allowance for Loan Losses - Nonaccrual (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	$ 465	$ 941
Commercial
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	398	930
Consumer
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	6	11
Construction and land \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	0	0
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	0	0
Commercial Real Estate \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	61	0
1 - 4 family residential \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	0	0
Multi-family residential \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans, excluding purchased credit impaired loans	$ 0	$ 0

Loans and Allowance for Loan Losses - Past Due (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Non-Accrual and Past Due Loans
Total Past Due	$ 6,402	$ 4,880
Total Current	2,227,116	987,017
Total Loans	2,233,518	991,897
Total 90 Days Past Due and Still Accruing	18	835
30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	5,416	2,942
60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	579	652
90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	407	1,286
Real Estate \| Construction and land
Non-Accrual and Past Due Loans
Total Past Due	320	1,047
Total Current	277,505	161,567
Total Loans	277,825	162,614
Total 90 Days Past Due and Still Accruing	0	0
Real Estate \| Construction and land \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	320	1,047
Real Estate \| Construction and land \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Construction and land \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Farmland
Non-Accrual and Past Due Loans
Total Past Due	104	0
Total Current	9,281	8,262
Total Loans	9,385	8,262
Total 90 Days Past Due and Still Accruing	0	0
Real Estate \| Farmland \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	104	0
Real Estate \| Farmland \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Farmland \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Real estate
Non-Accrual and Past Due Loans
Total Loans	342,817	154,820
Real Estate \| Commercial Real Estate
Non-Accrual and Past Due Loans
Total Past Due	1,830	754
Total Current	907,462	369,942
Total Loans	909,292	370,696
Total 90 Days Past Due and Still Accruing	0	754
Real Estate \| Commercial Real Estate \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	1,830	0
Real Estate \| Commercial Real Estate \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Commercial Real Estate \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	0	754
Real Estate \| 1 - 4 family residential \| Real estate
Non-Accrual and Past Due Loans
Total Past Due	1,413	724
Total Current	250,252	139,413
Total Loans	251,665	140,137
Total 90 Days Past Due and Still Accruing	0	0
Real Estate \| 1 - 4 family residential \| Real estate \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	1,274	510
Real Estate \| 1 - 4 family residential \| Real estate \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	139	214
Real Estate \| 1 - 4 family residential \| Real estate \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Multi-family residential \| Real estate
Non-Accrual and Past Due Loans
Total Past Due	0	0
Total Current	91,152	14,683
Total Loans	91,152	14,683
Total 90 Days Past Due and Still Accruing	0	0
Real Estate \| Multi-family residential \| Real estate \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Multi-family residential \| Real estate \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	0	0
Real Estate \| Multi-family residential \| Real estate \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	0	0
Commercial
Non-Accrual and Past Due Loans
Total Past Due	2,627	2,314
Total Current	681,924	289,102
Total Loans	684,551	291,416
Total 90 Days Past Due and Still Accruing	0	81
Commercial \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	1,849	1,344
Commercial \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	389	438
Commercial \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	389	532
Consumer
Non-Accrual and Past Due Loans
Total Past Due	108	41
Total Current	9,540	4,048
Total Loans	9,648	4,089
Total 90 Days Past Due and Still Accruing	18	0
Consumer \| 30 to 59 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	39	41
Consumer \| 60 to 89 Days Past Due
Non-Accrual and Past Due Loans
Total Past Due	51	0
Consumer \| 90 Days or Greater
Non-Accrual and Past Due Loans
Total Past Due	$ 18	$ 0

Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Impaired Loans
Unpaid Contractual Principal Balance	$ 1,068	$ 1,593
Recorded Investment with No Allowance	952	1,008
Recorded Investment with Allowance	116	585
Total Recorded Investment	1,068	1,593
Related Allowance	12	250
Average Recorded Investment During YTD	1,194	1,180
Real Estate \| Construction and land
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment with Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment During YTD	0	0
Real Estate \| Farmland
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment with Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment During YTD	0	0
Real Estate \| Commercial Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	434	382
Recorded Investment with No Allowance	434	382
Recorded Investment with Allowance	0	0
Total Recorded Investment	434	382
Related Allowance	0	0
Average Recorded Investment During YTD	445	440
Real Estate \| 1 - 4 family residential \| Real estate
Impaired Loans
Unpaid Contractual Principal Balance	161	164
Recorded Investment with No Allowance	161	164
Recorded Investment with Allowance	0	0
Total Recorded Investment	161	164
Related Allowance	0	0
Average Recorded Investment During YTD	163	265
Real Estate \| Multi-family residential \| Real estate
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment with Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment During YTD	0	0
Commercial
Impaired Loans
Unpaid Contractual Principal Balance	398	955
Recorded Investment with No Allowance	282	381
Recorded Investment with Allowance	116	574
Total Recorded Investment	398	955
Related Allowance	12	246
Average Recorded Investment During YTD	499	463
Consumer
Impaired Loans
Unpaid Contractual Principal Balance	75	92
Recorded Investment with No Allowance	75	81
Recorded Investment with Allowance	0	11
Total Recorded Investment	75	92
Related Allowance	0	4
Average Recorded Investment During YTD	$ 87	$ 12

Loans and Allowance for Loan Losses - Trouble Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Loan	Dec. 31, 2015 USD ($) Loan	Dec. 31, 2017 USD ($)
Troubled Debt Restructuring
Recorded investment in TDRs	$ 822		$ 618
Number of Loans \| Loan	3	2
Pre- Modification Outstanding Recorded Investment	$ 256	$ 667
Commercial
Troubled Debt Restructuring
Number of Loans \| Loan	2	1
Pre- Modification Outstanding Recorded Investment	$ 175	$ 399
Consumer
Troubled Debt Restructuring
Number of Loans \| Loan	1	1
Pre- Modification Outstanding Recorded Investment	$ 81	$ 268
Adjusted Interest Rate
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Adjusted Interest Rate \| Commercial
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Adjusted Interest Rate \| Consumer
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Extended Maturity
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Extended Maturity \| Commercial
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Extended Maturity \| Consumer
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	0
Extended Maturity and Restructured Payments
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	250	246
Extended Maturity and Restructured Payments \| Commercial
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	169	0
Extended Maturity and Restructured Payments \| Consumer
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	81	246
Extended Maturity, Restructured Payments and Adjusted Interest Rate
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	391
Extended Maturity, Restructured Payments and Adjusted Interest Rate \| Commercial
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	0	391
Extended Maturity, Restructured Payments and Adjusted Interest Rate \| Consumer
Troubled Debt Restructuring
Post-Modification Outstanding Recorded Investment	$ 0	$ 0

Loans and Allowance for Loan Losses - TDR's Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 Loan	Dec. 31, 2016 USD ($) Loan	Dec. 31, 2015 USD ($) Loan
Receivables [Abstract]
Number of loans restructured		3
Number of loans restructured past due		2	2
Number of loans restructured performing as agreed to modified terms		1
Valuation allowance for loans restructured \| $		$ 38	$ 132
Number of loans restructured placed on nonaccrual status		1	1
Number of Loans		3	2
Number of loans modified as a troubled debt restructured loan within previous 12 months and for which there was a payment default	0	0

Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Credit Quality Indicators
Loans	$ 2,233,518	$ 991,897
Pass
Credit Quality Indicators
Loans	2,155,437	986,808
Special Mention
Credit Quality Indicators
Loans	28,209	3,722
Substandard
Credit Quality Indicators
Loans	2,144	1,260
Doubtful
Credit Quality Indicators
Loans	116	107
PCI
Credit Quality Indicators
Loans	47,612
Real Estate \| Construction and land
Credit Quality Indicators
Loans	277,825	162,614
Real Estate \| Construction and land \| Pass
Credit Quality Indicators
Loans	277,186	162,614
Real Estate \| Construction and land \| Special Mention
Credit Quality Indicators
Loans	639	0
Real Estate \| Construction and land \| Substandard
Credit Quality Indicators
Loans	0	0
Real Estate \| Construction and land \| Doubtful
Credit Quality Indicators
Loans	0	0
Real Estate \| Construction and land \| PCI
Credit Quality Indicators
Loans	0
Real Estate \| Farmland
Credit Quality Indicators
Loans	9,385	8,262
Real Estate \| Farmland \| Pass
Credit Quality Indicators
Loans	9,336	8,262
Real Estate \| Farmland \| Special Mention
Credit Quality Indicators
Loans	0	0
Real Estate \| Farmland \| Substandard
Credit Quality Indicators
Loans	0	0
Real Estate \| Farmland \| Doubtful
Credit Quality Indicators
Loans	0	0
Real Estate \| Farmland \| PCI
Credit Quality Indicators
Loans	49
Real Estate \| Real estate
Credit Quality Indicators
Loans	342,817	154,820
Real Estate \| Commercial Real Estate
Credit Quality Indicators
Loans	909,292	370,696
Real Estate \| Commercial Real Estate \| Pass
Credit Quality Indicators
Loans	882,523	368,370
Real Estate \| Commercial Real Estate \| Special Mention
Credit Quality Indicators
Loans	8,771	2,326
Real Estate \| Commercial Real Estate \| Substandard
Credit Quality Indicators
Loans	681	0
Real Estate \| Commercial Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Real Estate \| Commercial Real Estate \| PCI
Credit Quality Indicators
Loans	17,317
Commercial
Credit Quality Indicators
Loans	684,551	291,416
Commercial \| Pass
Credit Quality Indicators
Loans	634,796	289,589
Commercial \| Special Mention
Credit Quality Indicators
Loans	18,337	686
Commercial \| Substandard
Credit Quality Indicators
Loans	1,155	1,034
Commercial \| Doubtful
Credit Quality Indicators
Loans	116	107
Commercial \| PCI
Credit Quality Indicators
Loans	30,147
Consumer
Credit Quality Indicators
Loans	9,648	4,089
Consumer \| Pass
Credit Quality Indicators
Loans	9,540	4,078
Consumer \| Special Mention
Credit Quality Indicators
Loans	0	0
Consumer \| Substandard
Credit Quality Indicators
Loans	108	11
Consumer \| Doubtful
Credit Quality Indicators
Loans	0	0
Consumer \| PCI
Credit Quality Indicators
Loans	0
1 - 4 family residential \| Real Estate \| Real estate
Credit Quality Indicators
Loans	251,665	140,137
1 - 4 family residential \| Real Estate \| Real estate \| Pass
Credit Quality Indicators
Loans	250,904	139,212
1 - 4 family residential \| Real Estate \| Real estate \| Special Mention
Credit Quality Indicators
Loans	462	710
1 - 4 family residential \| Real Estate \| Real estate \| Substandard
Credit Quality Indicators
Loans	200	215
1 - 4 family residential \| Real Estate \| Real estate \| Doubtful
Credit Quality Indicators
Loans	0	0
1 - 4 family residential \| Real Estate \| Real estate \| PCI
Credit Quality Indicators
Loans	99
Multi-family residential \| Real Estate \| Real estate
Credit Quality Indicators
Loans	91,152	14,683
Multi-family residential \| Real Estate \| Real estate \| Pass
Credit Quality Indicators
Loans	91,152	14,683
Multi-family residential \| Real Estate \| Real estate \| Special Mention
Credit Quality Indicators
Loans	0	0
Multi-family residential \| Real Estate \| Real estate \| Substandard
Credit Quality Indicators
Loans	0	0
Multi-family residential \| Real Estate \| Real estate \| Doubtful
Credit Quality Indicators
Loans	0	$ 0
Multi-family residential \| Real Estate \| Real estate \| PCI
Credit Quality Indicators
Loans	$ 0

Loans and Allowance for Loan Losses - Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis of allowance for loan losses
Balance at beginning of year	$ 8,524	$ 6,772	$ 5,981
Provision charged to earnings	5,114	2,050	868
Charge-offs	(839)	(333)	(140)
Recoveries	9	35	63
Net charge-offs	(830)	(298)	(77)
Balance at end of year	12,808	8,524	6,772
Allowance for loan losses (as a percent)				0.57%	0.86%	0.83%
Period-end amount allocated to:
Total specific reserves				$ 12	$ 250	$ 193
General reserves				12,796	8,274	6,579
Total	8,524	6,772	5,981	12,808	8,524	6,772
Real Estate \| Construction Land and Farmland
Analysis of allowance for loan losses
Balance at beginning of year	1,415	1,104	769
Provision charged to earnings	(100)	311	383
Charge-offs	0	0	(48)
Recoveries	0	0	0
Net charge-offs	0	0	(48)
Balance at end of year	1,315	1,415	1,104
Period-end amount allocated to:
Total specific reserves				0	0	0
General reserves				1,315	1,415	1,104
Total	1,415	1,104	769	1,315	1,415	1,104
Real Estate \| Real estate
Analysis of allowance for loan losses
Balance at beginning of year	1,116	1,124	1,166
Provision charged to earnings	368	(8)	(42)
Charge-offs	(11)	0	0
Recoveries	0	0	0
Net charge-offs	(11)	0	0
Balance at end of year	1,473	1,116	1,124
Period-end amount allocated to:
Total specific reserves				0	0	0
General reserves				1,473	1,116	1,124
Total	1,116	1,124	1,166	1,473	1,116	1,124
Real Estate \| Commercial Real Estate
Analysis of allowance for loan losses
Balance at beginning of year	3,003	2,189	1,890
Provision charged to earnings	1,407	814	294
Charge-offs	0	0	0
Recoveries	0	0	5
Net charge-offs	0	0	5
Balance at end of year	4,410	3,003	2,189
Period-end amount allocated to:
Total specific reserves				0	0	0
General reserves				4,410	3,003	2,189
Total	3,003	2,189	1,890	4,410	3,003	2,189
Commercial
Analysis of allowance for loan losses
Balance at beginning of year	2,955	2,324	2,092
Provision charged to earnings	3,452	913	262
Charge-offs	(828)	(314)	(87)
Recoveries	9	32	57
Net charge-offs	(819)	(282)	(30)
Balance at end of year	5,588	2,955	2,324
Period-end amount allocated to:
Total specific reserves				12	246	186
General reserves				5,576	2,709	2,138
Total	2,955	2,324	2,092	5,588	2,955	2,324
Consumer
Analysis of allowance for loan losses
Balance at beginning of year	35	31	64
Provision charged to earnings	(13)	20	(29)
Charge-offs	0	(19)	(5)
Recoveries	0	3	1
Net charge-offs	0	(16)	(4)
Balance at end of year	22	35	31
Period-end amount allocated to:
Total specific reserves				0	4	7
General reserves				22	31	24
Total	$ 35	$ 31	$ 64	$ 22	$ 35	$ 31

Loans and Allowance for Loan Losses - Allowance, Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 1,068	$ 1,593
Loans collectively evaluated for impairment	2,184,838	990,304
Total Loans	2,233,518	991,897
Real Estate \| Construction Land and Farmland
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	287,161	170,876
Total Loans	287,210	170,876
Real Estate \| Real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	161	164
Loans collectively evaluated for impairment	342,557	154,656
Total Loans	342,817	154,820
Real Estate \| Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	434	382
Loans collectively evaluated for impairment	891,541	370,314
Total Loans	909,292	370,696
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	398	955
Loans collectively evaluated for impairment	654,006	290,461
Total Loans	684,551	291,416
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	75	92
Loans collectively evaluated for impairment	9,573	3,997
Total Loans	9,648	$ 4,089
PCI loans
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	47,612
Total Loans	63,940
PCI loans \| Real Estate \| Construction Land and Farmland
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	49
PCI loans \| Real Estate \| Real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	99
PCI loans \| Real Estate \| Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	17,317
PCI loans \| Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	30,147
PCI loans \| Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	$ 0

Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses - PCI Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, gross	$ 2,233,518	$ 991,897
PCI loans
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI loans	47,612
Loans, gross	$ 63,940

Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses - PCI Accretable Yield Rollforward (Details)	12 Months Ended
	Dec. 31, 2017 USD ($)
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 0
Additions through acquisitions	3,927
Accretion	(1,204)
Balance at year-end	$ 2,723

Loans and Allowance for Loan Losses - Servicing Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Servicing Asset at Amortized Cost [Line Items]
Servicing asset	$ 74,737,000	$ 32,905,000
Summary of changes in related servicing assets
Balance at beginning of year	601,000	426,000
Servicing asset acquired through acquisition	313,000	0
Increase from loan sales	522,000	365,000
Amortization charged to income	(193,000)	(190,000)
Transfer of servicing assets to held for sale	(28,000)	0
Balance at end of period	1,215,000	601,000	$ 426,000
Valuation allowance recorded	0	0
Interest receivable	7,676,000	2,907,000
Proceeds from sale of loans	53,876,000	69,801,000	46,344,000
Gain on sale of loans	942,000	3,288,000	1,254,000
Small Business Administration Loans
Summary of changes in related servicing assets
Proceeds from sale of loans	27,747,000	18,704,000	6,724,000
Gain on sale of loans	1,940,000	1,690,000	$ 550,000
Interest-Only-Strip
Summary of changes in related servicing assets
Interest receivable	$ 0	$ 0

Bank Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	$ 82,301	$ 22,934
Less accumulated depreciation	7,050	5,521
Bank premises, furniture and equipment, net	75,251	17,413
Depreciation	1,566	1,111	$ 1,040
Building and improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	35,239	7,673
Site improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	140	0
Tenant improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	744	0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	5,132	3,119
Land
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	33,002	6,671
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	7,588	5,106
Construction in Progress
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	$ 456	$ 365

Non-marketable Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Non-marketable Equity Securities.
FHLB of Dallas stock	$ 6,431	$ 3,846
FRB of Dallas stock	3,482	3,470
Other non-marketable equity securities	3,819	50
Total non-marketable equity securities	$ 13,732	$ 7,366

Intangible Assets - Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets, Net [Abstract]
Gross Intangible Asset	$ 23,909	$ 4,379
Accumulated amortization	3,468	2,198
Net intangible assets	20,441	2,181
Amortization of intangible assets	964	380	$ 338
Amortization of Intangible Assets, Occupancy and Equipment, and Other Income
Finite-Lived Intangible Assets, Net [Abstract]
Amortization of intangible assets	$ 1,270	$ 595	$ 378
Core deposit intangibles
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Amortization Period	8 years 7 months 28 days	6 years 1 month 28 days
Gross Intangible Asset	$ 17,007	$ 3,459
Accumulated amortization	2,694	1,914
Net intangible assets	$ 14,313	$ 1,545
Servicing asset
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Amortization Period	6 years 9 months 30 days	7 years 11 months 5 days
Gross Intangible Asset	$ 1,621	$ 814
Accumulated amortization	406	213
Net intangible assets	$ 1,215	$ 601
Intangible lease assets
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Amortization Period	3 years 3 months 30 days
Gross Intangible Asset	$ 5,281
Accumulated amortization	368
Net intangible assets	$ 4,913
Other intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Weighted Amortization Period		4 years 3 months 18 days
Gross Intangible Asset		$ 106
Accumulated amortization		71
Net intangible assets		$ 35

Intangible Assets - Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Estimated aggregate future amortization expense [Abstract]
2018	$ 3,744
2019	2,981
2020	2,692
2021	2,147
2022	1,896
Thereafter	6,981
Net intangible assets	$ 20,441	$ 2,181

Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Balance as of December 31, 2016	$ 26,865	$ 26,865
Balance as of December 31, 2017	159,452	26,865
Sovereign acquisition
Goodwill [Roll Forward]
Acquisitions	109,091	0
Liberty acquisition
Goodwill [Roll Forward]
Acquisitions	$ 23,496	$ 0

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Noninterest-bearing demand accounts	$ 612,830	$ 327,614
Interest-bearing demand accounts	187,516	69,570
Savings accounts	52,822	11,166
Limited access money market accounts	960,149	579,950
Certificates of deposit, greater than $100	419,888	115,214
Certificates of deposit, less than $100	45,425	16,116
Total deposits	$ 2,278,630	$ 1,119,630

Deposits - Scheduled Maturities of Certificates of Deposit (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Banking and Thrift [Abstract]
2018	$ 413,269
2019	37,788
2020	10,508
2021	2,120
2022	1,628
2023	0
Total	$ 465,313

Deposits - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Demand deposit overdrafts reclassified as loans	$ 203	$ 30
Brokered deposits	$ 88,195	$ 27,035

Advances from the Federal Home Loan Bank - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank	$ 71,164	$ 38,306
Availability to borrow additional funds	$ 721,594
Weighted Average
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank, weighted average rate	1.36%

Advances from the Federal Home Loan Bank - Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
2018	$ 68,000
2022	3,164
Thereafter	0
Total	$ 71,164	$ 38,306

Other Credit Extensions (Details)	Dec. 31, 2017 USD ($) credit_facility	Dec. 31, 2016 USD ($) credit_facility
Federal Funds Credit Extensions With Commercial Banks
Other Credit Extensions
Number of credit facilities \| credit_facility	2	2
Maximum available borrowings	$ 55,000,000	$ 14,600,000
Outstanding borrowings	0	0
Federal Reserve Bank Secured Line Of Credit
Other Credit Extensions
Maximum available borrowings	338,592,000	197,262,000
Outstanding borrowings	0	0
Amounts of commercial loans pledged as collateral	$ 423,062,000	$ 265,001,000

Borrowed Funds - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Aug. 01, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Junior subordinated debentures	$ 11,702	$ 8,609	$ 3,093
Subordinated notes	4,987		4,942
Federal funds purchased	15,000		0
Issuance costs for related party debt	36		43
Affiliated Entity \| Subordinated Debt
Debt Instrument [Line Items]
Subordinated notes	4,987		4,942
Discount on related party debt	$ 13		$ 15

Borrowed Funds - Narrative (Details)	12 Months Ended
Borrowed Funds - Narrative (Details)	Dec. 31, 2017 USD ($) quarter	Dec. 31, 2013 USD ($) $ / shares shares	Aug. 01, 2017 USD ($)	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2011 USD ($)
Debt Instrument [Line Items]
Junior subordinated debentures	$ 11,702,000		$ 8,609,000	$ 3,093,000
Interest on securities, addition to LIBOR	0.00%
Debt instrument, effective percentage	5.34%
Face amount of subordinated notes issued to related party	$ 5,000,000
Other borrowings	$ 15,000,000			$ 0
Federal funds interest rate	2.00%
Maximum
Debt Instrument [Line Items]
Interest distribution quarterly periods \| quarter	5
Subordinated Debt
Debt Instrument [Line Items]
Face amount of subordinated notes issued to related party		$ 5,000,000
Fixed rate (as a percent)		6.00%
Affiliated Entity \| Subordinated Debt
Debt Instrument [Line Items]
Number of shares that warrants issued to related party may be converted into (in shares) \| shares		25,000
Exercise price of warrants issued to related party (in dollars per share) \| $ / shares		$ 11
Price used to calculate fair value of warrants issued to related party (in dollars per share) \| $ / shares				$ 0.80
Fidelity Resource Company \| Junior Subordinated Debt
Debt Instrument [Line Items]
Debentures assumed in business combination					$ 3,093,000
Parkway National Capital Trust 1
Debt Instrument [Line Items]
Distribution effective rate (as a percent)	3.44%			2.70%
Parkway National Capital Trust 1 \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable distribution rate (as a percent)	1.85%

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Line Items]
Deferred tax asset re-measurement due to the Tax Act	$ 3,051	$ 0	$ 0
Current tax receivable	7,085	91
Deferred tax asset	4,937
Deferred tax liabilities	327
Net deferred tax asset	$ 4,610	3,467
Other assets
Income Tax Disclosure [Line Items]
Net deferred tax asset		$ 3,467

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax expense (benefit):
Current									$ 7,886	$ 7,833	$ 4,492
Deferred									5,143	(1,366)	(375)
Total income tax expense	$ 7,227	$ 2,650	$ 1,802	$ 1,350	$ 1,630	$ 1,768	$ 1,639	$ 1,430	$ 13,029	$ 6,467	$ 4,117

Income Taxes - Reconciliation of Statutory Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal income tax expense rate at 35% for December 31, 2017 and 2016 and 34% for December 31, 2015									$ 9,863	$ 6,656	$ 4,388
Bank-owned life insurance									(206)	(216)	(208)
Non-deductible dues and memberships									132	59	56
Non-deductible meals and entertainment									80	49	46
Excess tax benefit from stock compensation									(268)	0	0
Deferred tax asset re-measurement due to the Tax Act									3,051	0	0
Other									377	(81)	(165)
Total income tax expense	$ 7,227	$ 2,650	$ 1,802	$ 1,350	$ 1,630	$ 1,768	$ 1,639	$ 1,430	$ 13,029	$ 6,467	$ 4,117
Effective tax rate (in percent)									46.20%	34.00%	31.90%
Federal income tax expense rate (in percent)									35.00%	35.00%	34.00%

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating loss	$ 0	$ 165
Organizational costs	64	405
Allowance for loan losses	2,592	2,918
Capital loss carryforward	57	95
FHLB Borrowing	28	57
Deferred rent expenses	302	90
Restricted stock	201	182
Stock options	334	399
Accrued bonuses	22	437
Loan discounts	4,805	211
Deferred compensation	115	0
Other real estate owned	219	0
Net unrealized gain on securities available for sale	340	643
Other	137	214
Total deferred tax assets	9,216	5,816
Deferred tax liabilities:
Core deposit intangibles	3,034	541
Partnership investments	497	0
Bank premises and equipment	912	1,795
Other	163	13
Total deferred tax liabilities	4,606	2,349
Net deferred tax asset	$ 4,610	$ 3,467

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 01, 2017
Minimum future rental payments under non-cancelable operating leases
2018	$ 2,349
2019	2,215
2020	1,703
2021	889
2022	691
Thereafter	2,134
Total	9,981
Rental expense on operating lease	2,298	$ 1,432	$ 1,399
Sublease income	139	$ 58	$ 30
Total Minimum Subrental	5
Qualified affordable housing investment	1,982
Qualified affordable housing project investments, unfunded commitment	1,765
Lease Exit Costs
Minimum future rental payments under non-cancelable operating leases
Cease-use liability	1,407
Cease-use expense	$ 117
Sovereign Bancshares, Inc. \| Lease Exit Costs
Minimum future rental payments under non-cancelable operating leases
Intangible lease obligation, net				$ 1,290

Commitments And Contingencies - Future Payments to be Received (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
2018	$ 1,546,000
2019	1,244,000
2020	1,076,000
2021	471,000
2022	100,000
Thereafter	100,000
Total	4,537,000
Rental income	$ 158,000	$ 0	$ 0

Commitments and Contingencies - Assets and Liabilities of the Corporate Building (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	$ 82,301	$ 22,934
Less accumulated depreciation	7,050	5,521
Bank premises, furniture and equipment, net	75,251	17,413
Gross Intangible Asset	23,909	4,379
Accumulated amortization	(3,468)	(2,198)
Net intangible assets	20,441	2,181
Building and improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	35,239	7,673
Site improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	140	0
Land
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	33,002	6,671
Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	37,537
Less accumulated depreciation	65
Bank premises, furniture and equipment, net	37,472
Intangible lease obligation, gross	584
Intangible lease obligation, accumulated amortization	(19)
Intangible lease obligation, net	565
Long Lived Assets (Liabilities), Gross	41,718
Long Lived Assets (Liabilities), Accumulated Depreciation And Amortization	287
Long Lived Assets (Liabilities), Net	41,431
Corporate, Non-Segment \| Building and improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	19,872
Less accumulated depreciation	33
Bank premises, furniture and equipment, net	19,839
Corporate, Non-Segment \| Site improvements
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	884
Less accumulated depreciation	32
Bank premises, furniture and equipment, net	852
Corporate, Non-Segment \| Land
Property, Plant and Equipment [Line Items]
Bank premises, furniture and equipment, gross	16,781
Less accumulated depreciation	0
Bank premises, furniture and equipment, net	16,781
Intangible lease assets
Property, Plant and Equipment [Line Items]
Gross Intangible Asset	5,281
Accumulated amortization	(368)
Net intangible assets	4,913
Intangible lease assets \| Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Gross Intangible Asset	4,765
Accumulated amortization	$ (241)
Net intangible assets		$ 4,524

Fair Value Disclosures - Recurring Basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Assets:
Investment securities available for sale	$ 228,117,000	$ 102,559,000
Recurring
Assets:
Investment securities available for sale	228,117,000	102,559,000
Liabilities measured at fair value	0	0
Transfer of assets from Level 2 to Level 3	0	0
Transfer of assets from Level 3 to Level 2	0	0
Recurring \| Level 1
Assets:
Investment securities available for sale	0	0
Recurring \| Level 2
Assets:
Investment securities available for sale	228,117,000	102,559,000
Recurring \| Level 3
Assets:
Investment securities available for sale	$ 0	$ 0

Fair Value Disclosures - Non-recurring Basis (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets:
Impaired loans, specific allowance	$ 12,000	$ 250,000
Non-recurring
Assets:
Impaired loans	116,000	1,593,000
Other real estate owned	449,000	662,000
Impaired loans, specific allowance	12,000	250,000
Liabilities measured at fair value		0
Non-recurring \| Level 1
Assets:
Impaired loans	0	0
Other real estate owned	0	0
Non-recurring \| Level 2
Assets:
Impaired loans	0	0
Other real estate owned	0	0
Non-recurring \| Level 3
Assets:
Impaired loans	116,000	1,593,000
Other real estate owned	$ 449,000	$ 662,000

Fair Value Disclosures - Level 3 (Details) - Collateral Method - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Impaired loans
Significant unobservable inputs used in the fair value measurements
Fair Value	$ 116	$ 1,593
Weighted Average (as a percent)	8.00%	8.00%
Other real estate owned
Significant unobservable inputs used in the fair value measurements
Fair Value	$ 449	$ 662
Weighted Average (as a percent)	8.00%	8.00%

Fair Value Disclosures - Financial Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Aug. 01, 2017	Dec. 31, 2016
Estimated fair values and carrying values of all financial instruments
Valuation allowance for servicing assets	$ 0		$ 0
Maximum maturity period for Federal Home Loan Bank advances recorded at carrying value	90 days
Financial assets:
Branch assets held for sale	$ 33,552,000		0
Financial liabilities:
Junior subordinated debentures	11,702,000	$ 8,609,000	3,093,000
Subordinated notes	4,987,000		4,942,000
Other borrowings	15,000,000		0
Branch liabilities held for sale	64,627,000		0
Carrying Amount
Financial assets:
Cash and cash equivalents	149,044,000		234,791,000
Loans held for sale	841,000		5,208,000
Loans	2,220,682,000		983,318,000
Accrued interest receivable	7,676,000		2,907,000
Bank-owned life insurance	21,476,000		20,077,000
Servicing asset	1,243,000		601,000
Non-marketable equity securities	13,732,000		7,366,000
Financial liabilities:
Deposits	2,278,630,000		1,119,630,000
Advances from FHLB	71,164,000		38,306,000
Accrued interest payable	445,000		141,000
Junior subordinated debentures	11,702,000		3,093,000
Subordinated notes	4,987,000		4,942,000
Other borrowings	15,000,000
Branch liabilities held for sale			64,300,000
Level 1 \| Total Fair Value
Financial assets:
Cash and cash equivalents	0		0
Loans held for sale	0		0
Loans	0		0
Accrued interest receivable	0		0
Bank-owned life insurance	0		0
Servicing asset	0		0
Non-marketable equity securities	0		0
Branch assets held for sale	0
Financial liabilities:
Deposits	0		0
Advances from FHLB	0		0
Accrued interest payable	0		0
Junior subordinated debentures	0		0
Subordinated notes	0		0
Other borrowings	0
Branch liabilities held for sale			0
Level 2 \| Total Fair Value
Financial assets:
Cash and cash equivalents	149,044,000		234,791,000
Loans held for sale	841,000		5,208,000
Loans			0
Accrued interest receivable	7,676,000		2,907,000
Bank-owned life insurance	21,476,000		20,077,000
Servicing asset	1,243,000		601,000
Non-marketable equity securities	13,732,000		7,366,000
Branch assets held for sale	5,515,000
Financial liabilities:
Deposits	2,164,498,000		1,085,888,000
Advances from FHLB	70,110,000		38,570,000
Accrued interest payable	445,000		141,000
Junior subordinated debentures	11,702,000		3,093,000
Subordinated notes	4,987,000		4,942,000
Other borrowings	15,000,000
Branch liabilities held for sale			64,300,000
Level 3 \| Total Fair Value
Financial assets:
Cash and cash equivalents	0		0
Loans held for sale	0		0
Loans	2,234,094,000		987,021,000
Accrued interest receivable	0		0
Bank-owned life insurance	0		0
Servicing asset	0		0
Non-marketable equity securities	0		0
Branch assets held for sale	26,313,000
Financial liabilities:
Deposits	0		0
Advances from FHLB	0		0
Accrued interest payable	0		0
Junior subordinated debentures	0		0
Subordinated notes	0		0
Other borrowings	$ 0
Branch liabilities held for sale			$ 0

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financial instruments with off-balance sheet risk
Total commitments	$ 615,750	$ 243,852
Commitments to extend credit
Financial instruments with off-balance sheet risk
Total commitments	606,451	236,919
Standby and commercial letters of credit
Financial instruments with off-balance sheet risk
Total commitments	$ 9,299	$ 6,933

Employee Benefits (Details) - USD ($)	1 Months Ended		12 Months Ended
Employee Benefits (Details) - USD ($)	Jun. 30, 2015	Jan. 31, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ESOP
Matching contributions to 401(k) profit sharing Plan			$ 0	$ 0
Proceeds from payments on ESOP Loan			$ 109,000	$ 109,000	$ 109,000
Summary of ESOP shares
Allocated shares (in shares)			53,269	44,257
Unearned shares (in shares)			9,771	18,783
Total ESOP shares (in shares)			63,040	63,040
Fair value of unearned shares			$ 256,000	$ 502,000
ESOP
ESOP
Proceeds ESOP borrowed from the Company		$ 500,000
Shares contributed to ESOP (in shares)		46,082
Proceeds from payments on ESOP Loan			$ 109,000	$ 109,000
Number of collateral shares released (in shares)			9,012	9,210
Issuance of stock to ESOP (in shares)	9,147
Compensation expense			$ 240,000	$ 204,000	$ 154,000

Stock and Incentive Plans - 2010 Plan (Details) - 2010 Stock Option and Equity Incentive Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				1,000,000
Stock based compensation expense	$ 63	$ 125	$ 224
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				100,000
Term of continuous service for vesting awards	4 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				900,000
Term of continuous service for vesting awards	5 years
Contractual terms for non-controlling participants	10 years
Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				500,000

Stock and Incentive Plans - 2010 Plan - Options (Details) - Nonperformance-based stock options - 2010 Stock Option and Equity Incentive Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Shares Underlying Options activity
Outstanding at beginning of period (in shares)	325,500,000	325,500	352,500
Forfeited during the period (in shares)	(3,000)		(6,000)
Exercised during the period (in shares)	(17,500)		(21,000)
Outstanding at the end of period (in shares)	305,000	325,500,000	325,500	352,500
Options exercisable at end of period (in shares)	298,000
Activity in weighted exercise price
Outstanding at beginning of period (in dollars per share)	$ 10.15	$ 10.15	$ 10.14
Forfeited during the period (in dollars per share)	10.00		10.00
Exercised during the period (in dollars per share)	10.00		10.00
Outstanding at the end of period (in dollars per share)	10.16	$ 10.15	$ 10.15	$ 10.14
Options exercisable at end of period (in dollars per share)	$ 10.12
Weighted Average Contractual Term
Outstanding at the end of period	3 years 7 months 2 days	4 years 6 months 22 days	4 years 6 months 22 days	6 years 6 months 29 days
Options exercisable at end of period	3 years 6 months 11 days
Exercises in period, intrinsic value	$ 308		$ 130
Aggregate intrinsic value of outstanding stock options (in dollars)	5,316
Options exercisable, intrinsic value	5,206
Additional disclosures
Unrecognized compensation expense (in dollars)	$ 8	$ 21	51
Requisite service period to recognize compensation cost	1 year 3 months
Nonperformance-based stock options exercised	$ 488	0	9
Nonperformance-based restricted stock units vested	$ 26	$ 194	$ 287
Outstanding at beginning of period (in shares)	27,750	39,750	62,250
Forfeited during the period (in shares)	(2,500)		(2,500)
Exercised during the period (in shares)	(1,000)	(12,000)	(20,000)
Outstanding at the end of period (in shares)	24,250	27,750	39,750	62,250
Outstanding at beginning of period (in dollars per share)	$ 11.92	$ 11.34	$ 10.86
Forfeited during the period (in dollars per share)	10.85		10.17
Exercised during the period (in dollars per share)	10.85	10.00	10.00
Outstanding at the end of period (in dollars per share)	$ 13.19	$ 11.92	$ 11.34	$ 10.86
Unrecognized compensation expense (in dollars)	$ 15	$ 90	$ 174

Stock and Incentive Plans - Omnibus Plan (Details) - Omnibus Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				1,000,000
Number of shares awarded under stock options (in shares)	212,983	76,286
Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)	121,125	25,060	8,000
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)	26,398	34,190	25,474
Vesting period	3 years
Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)	212,983	76,286	52,080
Vesting period	3 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 503	$ 224	$ 83
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1,373	$ 633	$ 326
Minimum \| Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of continuous service for vesting awards	1 year
Maximum \| Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of continuous service for vesting awards	5 years

Stock and Incentive Plans - Omnibus Plan Black Scholes Assumptions (Details) - Omnibus Plan	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Dividend yield	0.00%	0.00%	0.00%
Expected volatility, minimum (as a percent)	30.56%	33.37%	37.00%
Expected volatility, maximum (as a percent)	33.19%	37.55%	37.55%
Risk-free interest rate, minimum (as a percent)	1.96%	1.06%	1.76%
Risk-free interest rate, maximum (as a percent)	2.32%	2.01%	1.81%
Minimum
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Expected life	6 years 1 month 17 days	5 years	6 years
Maximum
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Expected life	7 years 6 months	6 years 6 months	6 years 6 months

Stock and Incentive Plans - Omnibus Plan - Options (Details) - Omnibus Plan - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Shares Underlying Options activity
Granted during the period (in shares)	212,983	76,286
Nonperformance-based stock options
Shares Underlying Options activity
Outstanding at beginning of period (in shares)	128,366	52,080	0
Granted during the period (in shares)	212,983	76,286	52,080
Forfeited during the period (in shares)	(9,082)
Exercised during the period (in shares)	(1,544)
Outstanding at the end of period (in shares)	330,723	128,366	52,080
Options exercisable at end of period (in shares)	51,821.29
Activity in weighted exercise price
Outstanding at beginning of period (in dollars per share)	$ 15.32	$ 14.35	$ 0.00
Granted during the period (in dollars per share)	26.97	15.98	14.35
Forfeited during the period (in dollars per share)	19.45
Exercised during the period (in dollars per share)	15.00
Outstanding at the end of period (in dollars per share)	22.71	$ 15.32	$ 14.35
Options exercisable at end of period (in dollars per share)	15.01
Weighted average fair value of options granted during the period (in dollars per share)	$ 9.88
Weighted Average Contractual Term
Outstanding at beginning of year	8 years 10 months 10 days	8 years 8 months 9 days	9 years 1 month 12 days
Options exercisable at end of period	7 years 5 months 27 days
Additional disclosures
Exercises in period, intrinsic value	$ 19
Aggregate intrinsic value of outstanding stock options (in dollars)	$ 1,614,000
Options exercisable at end of period (in shares)	51,821.29
Options exercisable, intrinsic value	$ 652,000
Unrecognized compensation expense (in dollars)	$ 1,958,000	$ 425,000	$ 187,000

Stock and Incentive Plans - Omnibus Plan - Restricted Stock Units (Details) - Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Nonperformance-based stock options
Activity in shares
Nonvested at the beginning of the period (in shares)	67,956	70,919	82,903
Granted (in shares)	121,125	25,060	8,000
Vested (in shares)	(34,342)	(28,023)	(16,451)
Forfeited (in shares)	(4,017)		(3,533)
Nonvested at the end of the period (in shares)	150,722	67,956	70,919
Activity in weighted average grant date fair value
Outstanding at beginning of period (in dollars per share)	$ 13.79	$ 13.29	$ 13.00
Granted (in dollars per share)	27.19	15.83	15.58
Vested (in dollars per share)	19.74	$ 14.35	13.00
Forfeited (in dollars per share)	$ 21.36		$ 13.00
Performance Based Restricted Stock Units
Activity in shares
Nonvested at the beginning of the period (in shares)	51,197	25,474	0
Granted (in shares)	26,398	34,190	25,474
Vested (in shares)	(19,861)	(8,467)
Forfeited (in shares)	(4,140)
Nonvested at the end of the period (in shares)	53,594	51,197	25,474
Activity in weighted average grant date fair value
Granted (in dollars per share)	$ 24.43	$ 9.52	$ 9.52
Vested (in dollars per share)	15.34	14.17
Forfeited (in dollars per share)	17.91
Nonvested at the end of the period (in dollars per share)	$ 8.72	$ 8.72	$ 8.72
Additional disclosures
Unrecognized compensation expense (in dollars)	$ 3,592	$ 1,089	$ 979

Stock and Incentive Plans - Fair Value Options Exercised or Restricted Stock Units Vested (Details) - Omnibus Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonperformance-based stock options exercised	$ 41	$ 0	$ 200
Nonperformance-based restricted stock units vested	568	505	267
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonperformance-based restricted stock units vested	$ 530	$ 137	$ 0

Related Party Transactions (Details)	12 Months Ended
Related Party Transactions (Details)	Dec. 31, 2017 USD ($) Entity	Dec. 31, 2016 USD ($)
Related Party Transactions [Abstract]
Aggregate amounts of loans to the Company's employees, officers, directors and their affiliates	$ 44,134,000	$ 27,296,000
New advances to the Company's employees, officers, directors and their affiliates	34,903,000	23,469,000
Principal payments received from the loans to employees, officers, directors, and their affiliates	18,065,000	4,586,000
Unfunded commitments to related parties	7,191,000	9,951,000
Deposits received from related parties	16,023,000	$ 25,994,000
Face amount of subordinated notes issued to related party	$ 5,000,000
Number of related party lenders \| Entity	2

Preferred Stock (Details) $ / shares in Units, $ in Thousands					3 Months Ended	12 Months Ended
	Aug. 08, 2017 USD ($) $ / shares shares	Aug. 01, 2017 USD ($)	Dec. 22, 2015 USD ($) $ / shares shares	Aug. 25, 2011 USD ($) quarter $ / shares shares	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Preferred Stock
Shares issued pursuant to SBLF program						$ 56,681
Business combination total redemption amount						49,000		$ 8,000
Payments for redemption of preferred stock						24,500	$ 0	8,000
Dividends						227	$ 0	$ 98
SBLF Preferred Stock
Preferred Stock
Number of quarters during which dividend rate fluctuates \| quarter				10
Redemption price as a percentage of liquidation amount plus accrued but unpaid dividends				100.00%
Liquidation amount (in dollars per share) \| $ / shares			$ 1,000	$ 1,000
Shares redeemed (in shares) \| shares			8,000
Payments for redemption of preferred stock			$ 8,018
SBLF Purchase Agreement \| SBLF Preferred Stock \| Initial dividend period
Preferred Stock
Dividend rate (as a percent)				1.00%
SBLF Purchase Agreement \| SBLF Preferred Stock \| Dividend period for tenth calendar quarter through four and one half years after issuance
Preferred Stock
Dividend rate (as a percent)			1.00%
Dividend period used in setting dividend rate				4 years 6 months
SBLF Purchase Agreement \| SBLF Preferred Stock \| Secretary of the Treasury
Preferred Stock
Shares issued pursuant to SBLF program (in shares) \| shares				8,000
Shares issued pursuant to SBLF program				$ 8,000
Sovereign Bancshares, Inc.
Preferred Stock
Business combination total redemption amount						24,500
Sovereign Bancshares, Inc. \| Series D Preferred Stock
Preferred Stock
Liquidation amount (in dollars per share) \| $ / shares	$ 1,000
Business combination total redemption amount	$ 24,727
Shares redeemed (in shares) \| shares	24,500,000
Accrued dividends assumed		$ 185
Dividends					$ 227	$ 227

Capital Requirements and Restrictions on Retained Earnings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total capital (to risk-weighted assets)
Actual Amount	$ 342,521	$ 228,566
Actual Ratio (as a percent)	13.16%	22.02%
For Capital Adequacy Purposes Amount	$ 208,219	$ 83,039
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
Tier 1 capital (to risk-weighted assets)
Actual Amount	$ 324,726	$ 215,057
Actual Ratio (as a percent)	12.48%	20.72%
For Capital Adequacy Purposes Amount	$ 156,118	$ 62,275
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
Common equity tier 1 (to risk-weighted assets)
Actual Amount	$ 313,024	$ 211,964
Actual Ratio (as a percent)	12.03%	20.42%
For Capital Adequacy Purposes Amount	$ 117,091	$ 46,711
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%
Tier 1 capital (to average assets)
Actual Amount	$ 324,726	$ 215,057
Actual Ratio (as a percent)	12.92%	16.82%
For Capital Adequacy Purposes Amount	$ 100,534	$ 51,143
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
Bank
Total capital (to risk-weighted assets)
Actual Amount	$ 296,207	$ 130,237
Actual Ratio (as a percent)	11.37%	12.55%
For Capital Adequacy Purposes Amount	$ 208,413	$ 83,020
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 260,516	$ 103,775
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	10.00%	10.00%
Tier 1 capital (to risk-weighted assets)
Actual Amount	$ 283,399	$ 121,713
Actual Ratio (as a percent)	10.88%	11.73%
For Capital Adequacy Purposes Amount	$ 156,286	$ 62,257
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 208,382	$ 83,010
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	8.00%	8.00%
Common equity tier 1 (to risk-weighted assets)
Actual Amount	$ 283,399	$ 121,713
Actual Ratio (as a percent)	10.88%	11.73%
For Capital Adequacy Purposes Amount	$ 117,215	$ 46,693
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 169,310	$ 67,445
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	6.50%	6.50%
Tier 1 capital (to average assets)
Actual Amount	$ 283,399	$ 121,713
Actual Ratio (as a percent)	11.28%	9.52%
For Capital Adequacy Purposes Amount	$ 100,496	$ 51,140
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 125,620	$ 63,925
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	5.00%	5.00%

Business Combinations - Narrative (Details)				3 Months Ended		12 Months Ended
Business Combinations - Narrative (Details)	Dec. 01, 2017 USD ($) shares	Aug. 08, 2017 USD ($) $ / shares shares	Aug. 01, 2017 USD ($) shares	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill				$ 159,452,000		$ 159,452,000	$ 26,865,000	$ 26,865,000
Business combination total redemption amount						49,000,000		8,000,000
Payment of preferred stock dividends						227,000	0	$ 98,000
Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Number of shares issued in connection with acquisition (in shares) \| shares			5,117,642
Cash paid to acquire business			$ 56,215,000			56,215,000
Goodwill				109,091,000		109,091,000
Goodwill, expected to be tax deductible	$ 0
Merger-related expenses						1,731,000	195,000
Business combination total redemption amount						24,500,000
Intangible assets acquired			$ 8,454,000	$ 8,454,000		8,454,000
Sovereign Bancshares, Inc. \| Series D Preferred Stock
Business Acquisition [Line Items]
Number of shares conversion ratio			1
Stock Redeemed or Called During Period, Shares \| shares		24,500,000
Liquidation per share value (USD per share) \| $ / shares		$ 1,000
Business combination total redemption amount		$ 24,727,000
Preferred stock dividends			$ 185,000
Payment of preferred stock dividends					$ 227,000	227,000
Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Number of shares issued in connection with acquisition (in shares) \| shares	1,449,944
Cash paid to acquire business	$ 25,009,000
Goodwill	23,496,000
Goodwill, expected to be tax deductible	0
Merger-related expenses						$ 960,000	$ 0
Core deposit intangibles
Business Acquisition [Line Items]
Finite-lived intangible assets, weighted average useful life						8 years 7 months 28 days	6 years 1 month 28 days
Core deposit intangibles \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Intangible assets acquired			$ 7,703,000
Finite-lived intangible assets, weighted average useful life			10 years	7 years 8 months 12 days
Core deposit intangibles \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Intangible assets acquired	$ 7,519,000
Finite-lived intangible assets, weighted average useful life	10 years
Scenario, Previously Reported \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Cash paid to acquire business			$ 56,215,000
Goodwill			108,967,000
Business combination total redemption amount			24,500,000
Intangible assets acquired			$ 8,662,000

Business Combinations - Sovereign Bancshares Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Aug. 01, 2017	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2016
Assets
Goodwill		$ 159,452	$ 159,452	$ 26,865	$ 26,865
Liabilities
Business combination total redemption amount			49,000	8,000
Consideration
Market value of common stock issued				$ 17,705
Sovereign Bancshares, Inc.
Assets
Cash and cash equivalents		44,775	44,775
Investment securities		166,307	166,307
Loans		752,450	752,450
Accrued interest receivable		3,102	3,102
Bank premises, furniture and equipment		17,805	17,805
Non-marketable equity securities		6,751	6,751
Other real estate owned		282	282
Intangible assets	$ 8,454	8,454	8,454
Goodwill		109,091	109,091
Other assets		13,148	13,148
Total assets		1,122,165	1,122,165
Liabilities
Deposits		809,366	809,366
Accounts payable and accrued expenses	80,000	6,284	6,284
Accrued interest payable and other liabilities		806	806
Advances from FHLB		80,000	80,000
Junior subordinated debentures		8,609	8,609
Total liabilities		905,065	905,065
Business combination total redemption amount			24,500
Consideration
Market value of common stock issued			136,385
Cash paid	56,215		56,215
Total fair value of consideration			$ 192,600
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Purchase accounting adjustments, Loans		1,594
Purchase accounting adjustments, accrued interest receivable		(335)
Purchase accounting adjustments, bank premises, furniture and equipment		(3,707)
Purchase accounting adjustments, intangible assets		(208)
Purchase accounting adjustments, goodwill		124
Purchase accounting adjustments, other assets		2,817
Purchase accounting adjustments, total assets		285
Purchase accounting adjustments, accounts payable and accrued expenses		1,095
Purchase accounting adjustments, accrued interest Payable and other liabilities		(810)
Purchase accounting adjustments, total liabilities		$ 285
Scenario, Previously Reported \| Sovereign Bancshares, Inc.
Assets
Cash and cash equivalents	44,775
Investment securities	166,307
Loans	750,856
Accrued interest receivable	3,437
Bank premises, furniture and equipment	21,512
Non-marketable equity securities	6,751
Other real estate owned	282
Intangible assets	8,662
Goodwill	108,967
Other assets	10,331
Total assets	1,121,880
Liabilities
Deposits	809,366
Accounts payable and accrued expenses	5,189
Accrued interest payable and other liabilities	1,616
Advances from FHLB	80,000
Junior subordinated debentures	8,609
Total liabilities	904,780
Business combination total redemption amount	24,500
Consideration
Market value of common stock issued	136,385
Cash paid	56,215
Total fair value of consideration	$ 192,600

Business Combinations - Loans Acquired (Details) - USD ($) $ in Thousands	Dec. 01, 2017	Aug. 01, 2017
Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		$ 752,450
Contractual principal balance		775,056
Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	$ 312,608
Contractual principal balance	317,867
PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		52,215
Contractual principal balance		67,985
Contractually required principal and interest		85,000
Non-accretable difference		29,288
Cash flows expected to be collected		55,712
Accretable difference		3,497
PCI loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	1,175
Contractual principal balance	1,748
Contractually required principal and interest	2,316
Non-accretable difference	711
Cash flows expected to be collected	1,605
Accretable difference	430
Real Estate \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		535,969
Real Estate \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	257,894
Real Estate \| PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		17,708
Real Estate \| PCI loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	868
Commercial \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		215,229
Commercial \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	49,967
Commercial \| PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		34,507
Commercial \| PCI loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	307
Consumer \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		1,252
Consumer \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	4,747
Consumer \| PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		0
Consumer \| PCI loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	0
Other acquired loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		700,235
Contractual principal balance		707,071
Other acquired loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	311,433
Contractual principal balance	316,119
Other acquired loans \| Real Estate \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		518,261
Other acquired loans \| Real Estate \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	257,026
Other acquired loans \| Commercial \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		180,722
Other acquired loans \| Commercial \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	49,660
Other acquired loans \| Consumer \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		$ 1,252
Other acquired loans \| Consumer \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	$ 4,747

Business Combinations - Summary of Intangible Assets Acquired (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Aug. 01, 2017	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Core deposit intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, weighted average useful life			8 years 7 months 28 days	6 years 1 month 28 days
Sovereign Bancshares, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 8,454	$ 8,454	$ 8,454
Sovereign Bancshares, Inc. \| Core deposit intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 7,703
Finite-lived intangible assets, weighted average useful life	10 years	7 years 8 months 12 days
Sovereign Bancshares, Inc. \| Servicing asset
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 317
Finite-lived intangible assets, weighted average useful life	6 years 1 month 6 days
Sovereign Bancshares, Inc. \| Intangible lease assets
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 434
Finite-lived intangible assets, weighted average useful life	5 years

Business Combinations - Liberty Bancshares Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 01, 2017	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 26,865	$ 159,452	$ 26,865
Market value of common stock issued		$ 17,705
Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents	$ 57,384
Investment securities	54,137
Loans	312,608
Accrued interest receivable	1,191
Bank premises, furniture and equipment	6,145
Non-marketable equity securities	2,096
Other real estate owned	166
Goodwill	23,496
Other assets	2,509
Total assets	467,251
Deposits	395,851
Accounts payable and accrued expenses	1,287
Accrued interest payable and other liabilities	142
Junior subordinated debentures	4,625
Total liabilities	401,905
Market value of common stock issued	40,337
Cash paid	25,009
Total fair value of consideration	65,346
Core deposit intangibles \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Intangible assets	$ 7,519

Business Combinations - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Combinations [Abstract]
Net interest income	$ 102,440	$ 98,701
Net income available to common stockholders	$ 22,270	$ 26,984
Basic earnings per share (in dollars per share)	$ 0.98	$ 1.55
Diluted earnings per share (in dollars per share)	$ 0.96	$ 1.53
Net interest income, since date of acquisition	$ 14,825
Net income available to common stockholders, since date of acquisition	$ 4,615

Branch Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets	$ 33,552	$ 0
Total liabilities	64,627	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	334
Loans	26,313
Accrued interest receivable	63
Bank premises, furniture and equipment	5,118
Intangible assets	1,724
Total assets	33,552
Deposits	64,282
Accounts payable and accrued expenses	2
Deferred tax liability	327
Accrued interest payable and other liabilities	16
Total liabilities	$ 64,627

Parent Company Only Financial Statements - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 149,044	$ 234,791	$ 71,551	$ 93,251
Other assets	14,518	5,067
Total assets	2,945,583	1,408,507
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other borrowings	15,000	0
Total liabilities	2,456,654	1,169,419
Stockholders’ equity:
Preferred stock	0	0
Common stock	241	152
Additional paid-in capital	445,517	211,173
Retained earnings	44,627	29,290
Unallocated employee stock ownership plan shares	(106)	(209)
Accumulated other comprehensive income	(1,280)	(1,248)
Treasury stock	(70)	(70)
Total stockholders’ equity	488,929	239,088	132,046	113,312
Total liabilities and stockholders’ equity	2,945,583	1,408,507
Veritex Holdings, Inc.
ASSETS
Cash and cash equivalents	46,724	98,366	$ 14,512	$ 27,399
Investment in subsidiaries	459,654	148,921
Other assets	2,267	438
Total assets	508,645	247,725
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	3,027	602
Other borrowings	16,689	8,035
Total liabilities	19,716	8,637
Stockholders’ equity:
Preferred stock	0	0
Common stock	241	152
Additional paid-in capital	445,517	211,173
Retained earnings	44,627	29,290
Unallocated employee stock ownership plan shares	(106)	(209)
Accumulated other comprehensive income	(1,280)	(1,248)
Treasury stock	(70)	(70)
Total stockholders’ equity	488,929	239,088
Total liabilities and stockholders’ equity	$ 508,645	$ 247,725

Parent Company Only Financial Statements - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest income:
Other									$ 8	$ 2	$ 2
Interest expense:
Interest on borrowings									1,166	652	543
Net interest income	$ 25,750	$ 19,129	$ 12,376	$ 11,253	$ 10,520	$ 10,517	$ 10,228	$ 9,690	68,508	40,955	31,459
Noninterest expense:
Salaries and employee benefits									20,828	14,332	11,265
Professional fees									5,672	2,804	2,023
Other									4,118	1,840	1,506
Total noninterest expense	15,035	12,522	7,782	7,450	7,085	7,029	6,301	5,975	42,789	26,390	21,388
Net income from operations									28,181	19,018	12,907
Income tax expense	7,227	2,650	1,802	1,350	1,630	1,768	1,639	1,430	13,029	6,467	4,117
Net income	$ 3,257	$ 5,182	$ 3,615	$ 3,098	$ 3,190	$ 3,375	$ 3,173	$ 2,813	15,152	12,551	8,790
Veritex Holdings, Inc.
Interest income:
Other									8	2	2
Interest expense:
Interest on borrowings									598	388	376
Net interest income									(590)	(386)	(374)
Noninterest expense:
Salaries and employee benefits									712	161	161
Professional fees									2,256	828	799
Other									0	1	2
Total noninterest expense									2,968	990	962
Net income from operations									(3,558)	(1,376)	(1,336)
Income tax expense									(730)	(480)	(454)
Loss before equity in undistributed income of subsidiaries									(2,828)	(896)	(882)
Equity in undistributed income of bank									17,980	13,447	9,672
Net income									$ 15,152	$ 12,551	$ 8,790

Parent Company Only Financial Statements - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 3,257	$ 5,182	$ 3,615	$ 3,098	$ 3,190	$ 3,375	$ 3,173	$ 2,813	$ 15,152	$ 12,551	$ 8,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net cash provided by operating activities									26,662	10,860	16,207
Cash flows from investing activities:
Net cash used in investing activities									(124,855)	(203,316)	(145,973)
Cash flows from financing activities:
Proceeds from exercise of employee stock options									175	0	210
Redemption of preferred stock									(24,500)	0	(8,000)
Proceeds from payments on ESOP Loan									109	109	109
Offering costs paid in connection with acquisitions									(772)	0	(252)
Dividends paid on preferred stock									(227)	0	(98)
Net cash provided by financing activities									12,446	355,696	108,066
Net (decrease) increase in cash and cash equivalents									(85,747)	163,240	(21,700)
Cash and cash equivalents at beginning of year				234,791				71,551	234,791	71,551	93,251
Cash and cash equivalents at end of year	149,044				234,791				149,044	234,791	71,551
Veritex Holdings, Inc.
Cash flows from operating activities:
Net income									15,152	12,551	8,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of debt costs									45	8	2
Equity in undistributed net income of Bank									(17,980)	(13,447)	(9,672)
Decrease (increase) in other assets									3,523	(155)	9
Increase (decrease) in other liabilities									1,353	270	(144)
Net cash provided by operating activities									2,093	(773)	(1,015)
Cash flows from investing activities:
Capital investment in subsidiary									0	(10,000)	0
Net cash used in investing activities									(80,761)	(10,000)	(3,841)
Cash flows from financing activities:
Net proceeds from sale of common stock in public offering									56,681	94,518	0
Redemption of preferred stock									(24,500)	0	0
Net change in other borrowings									(4,625)	0	0
Proceeds from exercise of employee stock options									175	0	210
Redemption of preferred stock									0	0	(8,000)
Proceeds from payments on ESOP Loan									109	109	109
Offering costs paid in connection with acquisitions									(772)	0	(252)
Dividends paid on preferred stock									(42)	0	(98)
Net cash provided by financing activities									27,026	94,627	(8,031)
Net (decrease) increase in cash and cash equivalents									(51,642)	83,854	(12,887)
Cash and cash equivalents at beginning of year				$ 98,366				$ 14,512	98,366	14,512	27,399
Cash and cash equivalents at end of year	$ 46,724				$ 98,366				46,724	98,366	14,512
Sovereign acquisition \| Veritex Holdings, Inc.
Cash flows from investing activities:
Net cash paid in Sovereign acquisition									(55,949)	0	0
Liberty acquisition \| Veritex Holdings, Inc.
Cash flows from investing activities:
Net cash paid in Sovereign acquisition									(24,812)	0	0
IBT Bancorp
Cash flows from investing activities:
Net cash paid in Sovereign acquisition									0	0	11,150
IBT Bancorp \| Veritex Holdings, Inc.
Cash flows from investing activities:
Net cash paid in Sovereign acquisition									$ 0	$ 0	$ (3,841)

Summary Of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Interest Income	$ 29,897	$ 22,279	$ 14,307	$ 13,069	$ 12,281	$ 12,054	$ 11,477	$ 10,783	$ 79,552	$ 46,595	$ 34,920
Interest Expense	4,147	3,150	1,931	1,816	1,761	1,537	1,249	1,093	11,044	5,640	3,461
Net interest income	25,750	19,129	12,376	11,253	10,520	10,517	10,228	9,690	68,508	40,955	31,459
Provision for loan losses	2,529	752	943	890	440	238	527	845	5,114	2,050	868
Noninterest income	2,298	1,977	1,766	1,535	1,825	1,893	1,412	1,373	7,576	6,503	3,704
Noninterest expense	15,035	12,522	7,782	7,450	7,085	7,029	6,301	5,975	42,789	26,390	21,388
Income tax expense	7,227	2,650	1,802	1,350	1,630	1,768	1,639	1,430	13,029	6,467	4,117
Net income	3,257	5,182	3,615	3,098	3,190	3,375	3,173	2,813	15,152	12,551	8,790
Preferred stock dividends	0	42	0	0	0	0	0	0	42	0	98
Net income allocated to common stockholders	$ 3,257	$ 5,140	$ 3,615	$ 3,098	$ 3,190	$ 3,375	$ 3,173	$ 2,813	$ 15,110	12,551	8,692
Stock issued in acquisitions, net of offering costs, value										$ 94,518	$ 17,453
Basic (in dollars per share)	$ 0.14	$ 0.26	$ 0.24	$ 0.20	$ 0.28	$ 0.32	$ 0.30	$ 0.26	$ 0.82	$ 1.16	$ 0.86
Diluted earnings per share (in dollars per share)	$ 0.14	$ 0.25	$ 0.23	$ 0.20	$ 0.27	$ 0.31	$ 0.29	$ 0.26	$ 0.80	$ 1.13	$ 0.84

Label	Element	Value
Performance Based Restricted Stock Units [Member] \| Omnibus Incentive Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	$ 9.45
Non-Performance Based Restricted Stock Units [Member] \| Omnibus Incentive Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	$ 13.29