View Filing Data

Fair Value of Options Exercised or Restricted Stock Units Vested as of September 30,

Non-performance based stock options exercised

Non-performance based restricted stock units vested

Print Document View Excel Document

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Oct. 24, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Veritex Holdings, Inc.
Entity Central Index Key	0001501570
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)		24,227,086
Document Fiscal Year Focus	2018
Entity Emerging Growth Company	true
Entity Small Business	false
Entity Ex Transition Period	true
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 31,204	$ 38,243
Interest bearing deposits in other banks	230,586	110,801
Total cash and cash equivalents	261,790	149,044
Investment securities	256,237	228,117
Loans held for sale	1,425	841
Loans, net of allowance for loan losses of $17,909 and $12,808, respectively	2,426,590	2,220,682
Accrued interest receivable	8,291	7,676
Bank-owned life insurance	21,915	21,476
Bank premises, furniture and equipment, net	77,346	75,251
Non-marketable equity securities	27,417	13,732
Investment in unconsolidated subsidiary	352	352
Other real estate owned	0	449
Intangible assets, net of accumulated amortization of $6,555 and $3,468, respectively	16,603	20,441
Goodwill	161,447	159,452
Other assets	16,433	14,518
Branch assets held for sale	0	33,552
Total assets	3,275,846	2,945,583
Deposits:
Noninterest-bearing	661,754	612,830
Interest-bearing	1,994,500	1,665,800
Total deposits	2,656,254	2,278,630
Accounts payable and accrued expenses	6,875	5,098
Accrued interest payable and other liabilities	5,759	5,446
Advances from Federal Home Loan Bank	73,055	71,164
Junior subordinated debentures	11,702	11,702
Subordinated notes	4,989	4,987
Other borrowings	0	15,000
Branch liabilities held for sale	0	64,627
Total liabilities	2,758,634	2,456,654
Commitments and contingencies (Note 6)
Stockholders’ equity:
Common stock, $0.01 par value; 75,000,000 shares authorized at September 30, 2018 and December 31, 2017; 24,191,622 and 24,109,515 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively (excluding 10,000 shares held in treasury)	242	241
Additional paid-in capital	448,117	445,517
Retained earnings	74,143	44,627
Unallocated Employee Stock Ownership Plan shares; 9,771 shares at September 30, 2018 and December 31, 2017	(106)	(106)
Accumulated other comprehensive loss	(5,114)	(1,280)
Treasury stock, 10,000 shares at cost	(70)	(70)
Total stockholders’ equity	517,212	488,929
Total liabilities and stockholders’ equity	$ 3,275,846	$ 2,945,583

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 17,909	$ 12,808
Intangible assets, accumulated amortization	$ 6,555	$ 3,468
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)	24,191,622	24,109,515
Common stock, shares outstanding (in shares)	24,191,622	24,109,515
Unallocated Employee Stock Ownership Plan shares, shares (in shares)	9,771	9,771
Treasury stock, shares (in shares)	10,000	10,000

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 35,074	$ 20,706	$ 99,432	$ 45,613
Interest on investment securities	1,722	941	4,697	2,251
Interest on deposits in other banks	1,016	629	2,316	1,787
Interest on other	6	3	15	4
Total interest income	37,818	22,279	106,460	49,655
Interest expense:
Interest on deposit accounts	7,762	2,812	18,507	6,201
Interest on borrowings	880	338	2,051	696
Total interest expense	8,642	3,150	20,558	6,897
Net interest income	29,176	19,129	85,902	42,758
Provision for loan losses	3,057	752	5,239	2,585
Net interest income after provision for loan losses	26,119	18,377	80,663	40,173
Noninterest income:
Service charges and fees on deposit accounts	809	669	2,588	1,733
(Loss) gain on sales of investment securities	(34)	205	(22)	205
Net gain on sales of loans and other assets owned	270	705	1,267	2,259
Bank-owned life insurance	194	188	575	561
Rental income	414	0	1,343	0
Other	857	210	2,132	520
Total noninterest income	2,510	1,977	7,883	5,278
Noninterest expense:
Salaries and employee benefits	7,394	5,921	23,225	13,471
Occupancy and equipment	2,890	1,596	8,267	3,622
Professional fees	4,297	1,973	7,803	3,959
Data processing and software expense	697	719	2,601	1,451
FDIC assessment fees	288	410	827	1,061
Marketing	306	436	1,213	905
Amortization of intangibles	798	223	2,632	413
Telephone and communications	236	230	1,076	438
Other	1,340	1,014	4,077	2,434
Total noninterest expense	18,246	12,522	51,721	27,754
Net income from operations	10,383	7,832	36,825	17,697
Income tax expense	1,448	2,650	7,309	5,802
Net income	8,935	5,182	29,516	11,895
Preferred stock dividends	0	42	0	42
Net income available to common stockholders	$ 8,935	$ 5,140	$ 29,516	$ 11,853
Basic earnings per share (in dollars per share)	$ 0.37	$ 0.26	$ 1.22	$ 0.70
Diluted earnings per share (in dollars per share)	$ 0.36	$ 0.25	$ 1.20	$ 0.69

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 8,935	$ 5,182	$ 29,516	$ 11,895
Other comprehensive (loss) income:
Unrealized (losses) gains on securities available for sale arising during the period, net	(1,359)	378	(4,875)	2,000
Reclassification adjustment for (losses) gains included in net income	(34)	205	(22)	205
Other comprehensive (loss) income, before tax	(1,325)	173	(4,853)	1,795
Income tax (benefit) expense	(278)	60	(1,019)	609
Other comprehensive (loss) income, net of tax	(1,047)	113	(3,834)	1,186
Comprehensive income	$ 7,888	$ 5,295	$ 25,682	$ 13,081

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Unallocated Employee Stock Ownership Plan Shares	Treasury Stock	Series D Preferred Stock	Series D Preferred Stock Additional Paid-In Capital
Beginning balance (in shares) at Dec. 31, 2016		15,195,328
Beginning balance at Dec. 31, 2016	$ 239,088	$ 152	$ 211,173	$ 29,290	$ (1,248)	$ (209)	$ (70)
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		27,744
Restricted stock units vested, net of shares withheld to cover tax withholdings	(206)		(206)
Exercise of employee stock options (in shares)		17,949
Exercise of employee stock options	169		169
Issuance of common stock for acquisition of Sovereign Bancshares, Inc., net of offering costs of $426 (shares)		5,117,642
Issuance of common stock for acquisition of Sovereign Bancshares, Inc., net of offering costs of $426, amount	135,959	$ 51	135,908
Issuance of stock (in shares)		2,285,050
Issuance of stock	56,681	$ 24	56,657					$ 24,500	$ 24,500
Redemption of preferred stock, series D	(24,500)		(24,500)
Stock based compensation	1,199		1,199
Net income	11,895			11,895
Preferred stock, series D dividend	(42)			(42)
Other comprehensive (loss) income	1,186				1,186
Ending balance (in shares) at Sep. 30, 2017		22,643,713
Ending balance at Sep. 30, 2017	$ 445,929	$ 227	404,900	41,143	(62)	(209)	(70)
Beginning balance (in shares) at Dec. 31, 2017	24,109,515	24,109,515
Beginning balance at Dec. 31, 2017	$ 488,929	$ 241	445,517	44,627	(1,280)	(106)	(70)
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		74,706
Restricted stock units vested, net of shares withheld to cover tax withholdings	(445)	$ 1	(446)
Exercise of employee stock options (in shares)		7,401
Exercise of employee stock options	$ (29)		(29)
Issuance of common stock for acquisition of Sovereign Bancshares, Inc., net of offering costs of $426 (shares)	5,117,642
Redemption of preferred stock, series D	$ 0
Stock based compensation	3,075		3,075
Net income	29,516			29,516
Other comprehensive (loss) income	$ (3,834)				(3,834)
Ending balance (in shares) at Sep. 30, 2018	24,191,622	24,191,622
Ending balance at Sep. 30, 2018	$ 517,212	$ 242	$ 448,117	$ 74,143	$ (5,114)	$ (106)	$ (70)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Payments of stock issuance costs		$ 304
Restricted Stock Units
Shares withheld to cover tax withholdings (in shares)	14,978	7,667,000
Employee Stock Options
Shares withheld to cover tax withholdings (in shares)	1,691	1,095,000
Shares paid for cashless exercise (in shares)	4,391

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 29,516	$ 11,895
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,348	1,588
Provision for loan losses	5,239	2,585
Accretion of loan purchase discount	(6,882)	(828)
Stock-based compensation expense	3,075	1,199
Excess tax benefit from stock compensation	(168)	(233)
Net amortization of premiums on investment securities	1,478	1,217
Change in cash surrender value of bank-owned life insurance	(439)	(440)
Loss on sales of investment securities	(22)	(205)
Gain on sales of loans held for sale	(566)	(705)
Gain on sales of SBA loans	(701)	(1,562)
Net loss on sales of other real estate owned	0	8
Amortization of subordinated note discount and debt issuance costs	2	45
Net originations of loans held for sale	(28,361)	(30,975)
Write down on other real estate owned	156	37
Proceeds from sales of loans held for sale	28,343	34,709
Net gain on sale of branches	(349)	0
Decrease (increase) in accrued interest receivable and other assets	670	(312)
Increase (decrease) in accounts payable, accrued expenses, accrued interest payable and other liabilities	2,502	(1,683)
Net cash provided by operating activities	38,841	16,340
Cash flows from investing activities:
Cash settlement for sale of held for sale branches	(31,810)	0
Purchases of securities available for sale	(90,005)	(70,621)
Sales of securities available for sale	30,961	118,165
Proceeds from maturities, calls and pay downs of investment securities	24,615	17,317
(Purchases) sales of non-marketable equity securities, net	(13,685)	3,834
Net loans originated	(217,055)	(187,283)
Proceeds from sale of SBA loans	9,443	24,273
Net additions to bank premises and equipment	(3,194)	(2,208)
Proceeds from sales of other real estate owned	291	161
Net cash used in investing activities	(290,439)	(107,802)
Cash flows from financing activities:
Net change in deposits	377,927	56,662
Net change in advances from Federal Home Loan Bank	1,891	(80,106)
Net proceeds from sale of common stock in public offering	0	56,681
Net change in other borrowings	(15,000)	0
Redemption of preferred stock - series D	0	(24,500)
Dividends paid on preferred stock - series D	0	(227)
Proceeds from exercise of employee stock options	27	175
Payments to tax authorities for stock-based compensation	(501)	(212)
Offering costs paid in connection with acquisition	0	(426)
Net cash provided by financing activities	364,344	8,047
Net increase (decrease) in cash and cash equivalents	112,746	(83,415)
Cash and cash equivalents at beginning of period	149,044	234,791
Cash and cash equivalents at end of period	261,790	151,376
Sovereign Bancshares, Inc.
Cash flows from investing activities:
Cash settlement for sale of held for sale branches	$ 0	$ (11,440)

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Nature of Organization

Veritex Holdings, Inc. (“Veritex” or the “Company”), a Texas corporation and bank holding company, was incorporated in July 2009 and was formed for the purpose of acquiring one or more financial institutions located in Dallas, Texas and surrounding areas.

Veritex, through its wholly-owned subsidiary, Veritex Community Bank (the “Bank”), is a Texas state banking organization, with corporate offices in Dallas, Texas, and currently operates 20 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.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of Veritex and the Bank as its wholly-owned subsidiary.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”), but do not include all of the information and footnotes required for complete financial statements. Intercompany transactions and balances are eliminated in consolidation. In management’s opinion, these interim unaudited condensed consolidated financial statements include all adjustments of a normal recurring nature necessary for a fair statement of the Company’s condensed consolidated financial position at September 30, 2018 and December 31, 2017, condensed consolidated results of operations for the three and nine months ended September 30, 2018 and 2017, condensed consolidated stockholders’ equity for the nine months ended September 30, 2018 and 2017 and condensed consolidated cash flows for the nine months ended September 30, 2018 and 2017.

Accounting measurements at interim dates inherently involve greater reliance on estimates than at year end and the results for the interim periods shown herein are not necessarily indicative of results to be expected for the full year due in part to global economic and financial market conditions, interest rates, access to sources of liquidity, market competition and interruptions of business processes. These interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2017 included within the Company’s Form 10-K as filed with the Securities and Exchange Commission on March 14, 2018.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions may also affect disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

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

Some items in the prior year financial statements were reclassified to conform to the current presentation.

Revenue from Contracts with Customers

The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous periods.

The Company’s primary sources of revenue are derived from interest income on financial assets that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Condensed Consolidated Statements of Income was not necessary. The Company generally fully satisfies its performance obligations under its contracts with customers as services are rendered and the transaction prices are typically fixed and charged either on a periodic basis or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 that significantly affects the determination of the amount and timing of revenue from contracts with customers.

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 three and nine months ended September 30, 2018 and 2017:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Earnings (numerator)
Net income	$	8,935	$	5,182	$	29,516	$	11,895
Less: preferred stock dividends	—		42		—		42
Net income available to common stockholders	$	8,935	$	5,140	$	29,516	$	11,853
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS	24,176		19,976		24,151		16,813
Dilutive effect of employee stock-based awards	437		416		436		419
Adjusted weighted average shares outstanding	24,613		20,392		24,587		17,232
Earnings per share:
Basic	$	0.37	$	0.26	$	1.22	$	0.70
Diluted	$	0.36	$	0.25	$	1.20	$	0.69

For the three and nine months ended September 30, 2018 and 2017, there were no antidilutive shares excluded from the diluted EPS weighted average shares outstanding.

Adoption of New Accounting Standards

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which requires an entity to 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. The ASU replaces most existing revenue recognition guidance in GAAP. The new standard was effective for the Company on January 1, 2018. Adoption of ASU 2014-09 did not have a material impact on the Company’s condensed consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest income on financial assets that are not within the scope of ASU 2014-09. The Company’s revenue recognition pattern for revenue streams within the scope of ASU 2014-09, including but not limited to service charges on deposit accounts, did not change significantly from current practice. The standard permits the use of either the full retrospective or modified retrospective transition method. The Company elected to use the modified retrospective transition method which requires application of ASU 2014-09 to uncompleted contracts at the date of adoption. However, periods prior to the date of adoption will not be retrospectively revised as the impact of the ASU on uncompleted contracts at the date of adoption was not material.

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which 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. The adoption of ASU 2016-01 on January 1, 2018 did not have a material impact on the Company’s condensed consolidated financial statements. In accordance with (iv) above, the Company measured the fair value of its loan portfolio prospectively using an exit price notion. See Note 7 – “Fair Value Disclosures” for further information regarding the valuation of these loans.

Recent Accounting Pronouncements

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 the process of evaluating the impact of this pronouncement, which is not expected to 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 2016-02, “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. Topic 842 was subsequently amended by ASU 2018-11, “Targeted Improvements.” ASU 2016-02 will require organizations that lease assets to recognize a right-of-use (“ROU”) asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement.

ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (i) its effective date or (ii) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. If an entity chooses the second option, the transition requirements for existing leases also apply to leases entered into between the date of initial application and the effective date. The entity must also recast its comparative period financial statements and provide the disclosures required by the new standard for the comparative periods. We expect to adopt the new standard on January 1, 2019 and use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019.

ASU 2016-02 provides a number of optional practical expedients in transition. We expect to elect the ‘package of practical expedients’ as both the lessee and lessor, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We currently expect to elect the short-term lease recognition exemption for leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets and leases liabilities for any lease that has a lease term at commencement date of 12 months or less and does not include a purchase option. We also currently expect to elect the practical expedient to not separate lease and non-lease components for all leases. We expect that this standard will have a material effect on our consolidated balance sheets but will not have a material impact on our consolidated statements of income. While we continue to assess all the effects of adoption, we currently believe the most significant effects relate to (i) the recognition of new ROU assets and lease liabilities on our balance sheet for our property and equipment operating leases and (ii) providing significant new disclosures about our lease activities. We do not expect a significant change in our leasing activities between now and adoption.

Supplemental Statement of Cash Flows

9 Months Ended

Sep. 30, 2018

Supplemental Cash Flow Elements [Abstract]

Supplemental Statement of Cash Flows

Other supplemental cash flow information is presented below:



	Nine Months Ended September 30,
	2018			2017
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	19,939		$	6,714
Cash paid for income taxes	6,025			6,025
Supplemental Disclosures of Non-Cash Flow Information:
Net foreclosure of other real estate owned and repossessed assets	$	8		$	—
Non-cash assets acquired⁽¹⁾
Investment securities	$	—		$	166,307
Loans	(4,050		)	750,856
Accrued interest receivable	—			3,437
Bank premises, furniture and equipment	1,162			21,512
Non-marketable equity securities	—			6,751
Other real estate owned	—			282
Intangible assets	(956		)	8,662
Goodwill	1,995			108,967
Other assets	1,806			10,331
Total assets	$	(43	)	$	1,077,105
Non-cash liabilities assumed⁽¹⁾
Deposits	$	303		$	809,366
Accounts payable and accrued expenses⁽²⁾	—			5,189
Accrued interest payable and other liabilities	(260		)	1,616
Advances from Federal Home Loan Bank	—			80,000
Junior subordinated debentures	—			8,609
Total liabilities	43			904,780
Non-cash equity assumed
Preferred stock - series D	—			24,500
Total equity	—			24,500
5,117,642 shares of common stock issued in connection with acquisition	$	—		$	136,385

⁽¹⁾ Represents adjustments to provisional estimates recorded for acquisitions of Sovereign Bancshares, Inc. (“Sovereign”) and Liberty Bancshares, Inc. (“Liberty”). Refer to Note 12 Business Combinations for further discussion.

⁽²⁾ Accounts payable and accrued expenses included in accrued preferred stock dividends of $185.

Investment Securities

9 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities

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



	September 30, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for Sale
U.S. government agencies	$	9,094	$	—	$	241	$	8,853
Corporate bonds	26,534		2		276		26,260
Municipal securities	43,309		12		543		42,778
Mortgage-backed securities	94,088		9		3,212		90,885
Collateralized mortgage obligations	89,162		12		2,238		86,936
Asset-backed securities	523		2		—		525
	$	262,710	$	37	$	6,510	$	256,237



	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized 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

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 months or more:



	September 30, 2018
	Less Than 12 Months				12 Months or More				Totals
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for Sale
U.S. government agencies	$	8,352	$	215	$	501	$	26	$	8,853	$	241
Corporate bonds	23,556		276		—		—		23,556		276
Municipal securities	30,524		299		7,052		244		37,576		543
Mortgage-backed securities	49,926		1,507		39,483		1,705		89,409		3,212
Collateralized mortgage obligations	50,214		986		26,223		1,252		76,437		2,238
	$	162,572	$	3,283	$	73,259	$	3,227	$	235,831	$	6,510



	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

The number of investment positions in an unrealized loss position totaled 170 and 118 at September 30, 2018 and December 31, 2017, 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, (i) management does not have the intent to sell investment securities prior to recovery and/or maturity, (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) 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 September 30, 2018 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 regarding these securities.

The amortized costs and estimated fair values of securities available for sale, by contractual maturity, as of the dates indicated, are shown in the table 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.



	September 30, 2018
	Available For Sale
	Amortized Cost		Fair Value
Due in one year or less	$	2,401	$	2,401
Due from one year to five years	18,848		18,534
Due from five years to ten years	42,543		42,137
Due after ten years	15,145		14,819
	78,937		77,891
Mortgage-backed securities	94,088		90,885
Collateralized mortgage obligations	89,162		86,936
Asset-backed securities	523		525
	$	262,710	$	256,237



	December 31, 2017
	Available For Sale
	Amortized Cost		Fair 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

Proceeds from sales of investment securities available for sale and gross gains and losses for the nine months ended September 30, 2018 and 2017 were as follows:



	Nine Months Ended September 30,
	2018		2017
Proceeds from sales	$	30,961	$	118,165
Gross realized gains	335		335
Gross realized losses	357		130

There was a blanket floating lien on all securities held by the Company to secure Federal Home Loan Bank advances as of September 30, 2018 and December 31, 2017.

Loans and Allowance for Loan Losses

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans and Allowance for Loan Losses

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



	September 30, 2018			December 31, 2017
Real estate:
Construction and land	$	294,143		$	277,825
Farmland	10,853			9,385
1 - 4 family residential	289,808			236,542
Multi-family residential	50,317			106,275
Commercial real estate	1,069,088			909,292
Commercial	723,140			684,551
Consumer	7,166			9,648
	2,444,515			2,233,518
Deferred loan fees	(16		)	(28		)
Allowance for loan losses	(17,909		)	(12,808		)
	$	2,426,590		$	2,220,682

Included in the net loan portfolio as of September 30, 2018 and December 31, 2017 was an accretable discount related to purchased performing and purchased credit impaired (“PCI”) loans acquired within a business combination in the approximate amounts of $10,899 and $12,135, 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 September 30, 2018 and December 31, 2017 is a discount on retained loans from sale of originated Small Business Administration (“SBA”) loans of $1,635 and $1,189, respectively.

The majority of the loan portfolio is comprised 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 September 30, 2018 and December 31, 2017.

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 September 30, 2018 and December 31, 2017, are as follows:



	Non-Accrual Loans
	September 30, 2018		December 31, 2017
Real estate:
Construction and land	$	2,107	$	—
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial real estate	—		61
Commercial	19,712		398
Consumer	3		6
	$	21,822	$	465

At September 30, 2018, non-accrual loans included PCI loans of $17,158 for which discount accretion has been suspended because the extent and timing of cash flows from these PCI loans can no longer be reasonably estimated. There were no PCI loans classified as non-accrual at December 31, 2017.

During the three and nine months ended September 30, 2018, interest income not recognized on non-accrual loans was $331 and $371. During the three and nine months ended September 30, 2017, interest income not recognized on non-accrual loans was minimal.

An age analysis of past due loans, aggregated by class of loans, as of September 30, 2018 and December 31, 2017 is as follows:



	September 30, 2018
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current		PCI		Total Loans		Total 90 Days Past Due and Still Accruing⁽¹⁾
Real estate:
Construction and land	$	—	$	795	$	—	$	795	$	293,348	$	—	$	294,143	$	—
Farmland	—		—		—		—		10,816		37		10,853		—
1 - 4 family residential	426		35		—		461		289,259		88		289,808		—
Multi-family residential	—		—		—		—		50,317		—		50,317		—
Commercial real estate	1,340		2,661		259		4,260		1,047,874		16,954		1,069,088		259
Commercial	3,092		320		3,998		7,410		692,957		22,773		723,140		3,998
Consumer	23		—		45		68		7,098		—		7,166		45
	$	4,881	$	3,811	$	4,302	$	12,994	$	2,391,669	$	39,852	$	2,444,515	$	4,302

⁽¹⁾ Loans 90 days past due and still accruing excludes $267 of PCI loans as of September 30, 2018.



	December 31, 2017
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current⁽¹⁾		PCI		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		9,232		49		9,385		—
1 - 4 family residential	1,274		139		—		1,413		235,030		99		236,542		—
Multi-family residential	—		—		—		—		106,275		—		106,275		—
Commercial real estate	1,830		—		—		1,830		890,145		17,317		909,292		—
Commercial	1,849		389		389		2,627		651,777		30,147		684,551		—
Consumer	39		51		18		108		9,540		—		9,648		18
	$	5,416	$	579	$	407	$	6,402	$	2,179,504	$	47,612	$	2,233,518	$	18

⁽¹⁾ To conform to the current period presentation, $15,123 of loans were reclassified from 1-4 family residential to multi-family residential within the total current column. Additionally, PCI loan balances were reclassified from the total current column to the PCI column.

⁽²⁾ Loans 90 days past due and still accruing excludes $3,300 of PCI loans as of December 31, 2017.

Loans past due 90 days and still accruing increased from $18 as of December 31, 2017 to $4,302 as of September 30, 2018. These loans are also considered well-secured, an are in the process of collection with plans in place for the borrowers to bring the notes fully current or to subsequently be renewed. 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 and TDRs at September 30, 2018 and December 31, 2017 are summarized in the following tables.



	September 30, 2018⁽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	$	2,107	$	2,107	$	—	$	2,107	$	—	$	2,284
Farmland	—		—		—		—		—		—
1 - 4 family residential	160		160		—		160		—		160
Multi-family residential	—		—		—		—		—		—
Commercial real estate	366		366		—		366		—		370
Commercial	2,929		295		2,634		2,929		378		3,057
Consumer	66		66		—		66		—		74
Total	$	5,628	$	2,994	$	2,634	$	5,628	$	378	$	5,945

⁽¹⁾ ⁾ Loans reported exclude PCI loans.



	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⁾ Loans reported exclude PCI loans.

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.

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 $1,207 and $618 as of September 30, 2018 and December 31, 2017, respectively.

During the nine months ended September 30, 2018 certain loans were modified as TDRs, the terms of which are summarized in the following table. During the same period in 2017, no loans were modified as TDRs.



				During the nine months ended September 30, 2018
				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
Real estate:
Construction and land	—	$	—	$	—	$	—	$	—	$	—
Farmland	—	—		—		—		—		—
1 - 4 family residential	—	—		—		—		—		—
Multi-family residential	—	—		—		—		—		—
Commercial real estate	—	—		—		—		—		—
Commercial	3	628		—		612		—		—
Consumer	—	—		—		—		—		—
Total	3	$	628	$	—	$	612	$	—	$	—

All TDRs are measured individually for impairment. Of the three loans restructured during the nine months ended September 30, 2018, one was past due and two were performing as agreed to the modified terms. A specific allowance for loan loss of $68 was recorded for one of the three loans as of the nine months ended September 30, 2018. Two of the three loans are on non-accrual status as of September 30, 2018.

There were no loans modified as TDR loans within the previous 12 months and for which there was a payment default during the nine months ended September 30, 2018 and 2017. A default for purposes of this disclosure is a TDR loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral.

Interest income recorded during the three and nine months ended September 30, 2018 and 2017 on TDR loans and interest income that would have been recorded had the terms of the loans not been modified was minimal.

The Company has not committed to lend additional amounts to customers with outstanding loans classified as TDRs as of September 30, 2018 or December 31, 2017.

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 impairment. 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 generally not so pronounced that the Company 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 quarterly on a projected cash flow basis.

The following tables summarize the Company’s internal ratings of its loans, including PCI loans, as of September 30, 2018 and December 31, 2017:



	September 30, 2018
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	289,816	$	2,220	$	2,107	$	—	$	—	$	294,143
Farmland	10,816		—		—		—		37		10,853
1 - 4 family residential	289,101		305		314		—		88		289,808
Multi-family residential	50,317		—		—		—		—		50,317
Commercial real estate	1,035,028		5,081		12,025		—		16,954		1,069,088
Commercial	685,727		7,022		7,618		—		22,773		723,140
Consumer	6,984		—		182		—		—		7,166
Total	$	2,367,789	$	14,628	$	22,246	$	—	$	39,852	$	2,444,515



	December 31, 2017
	Pass⁽¹⁾		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	235,781		462		200		—		99		236,542
Multi-family residential	106,275		—		—		—		—		106,275
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

⁽¹⁾To conform to the current period presentation, $15,123 was reclassified from 1-4 family residential to multi-family residential within the pass column. There were no reclassifications between internal rating buckets.

An analysis of the allowance for loan losses for the nine months ended September 30, 2018 and 2017 and year ended December 31, 2017 is as follows:



	Nine Months Ended September 30, 2018			Year Ended December 31, 2017			Nine Months Ended September 30, 2017
Balance at beginning of period	$	12,808		$	8,524		$	8,524
Provision charged to earnings	5,239			5,114			2,585
Charge-offs	(171		)	(839		)	(622		)
Recoveries	33			9			5
Net charge-offs	(138		)	(830		)	(617		)
Balance at end of period	$	17,909		$	12,808		$	10,492

The allowance for loan losses as a percentage of total loans was 0.73%, 0.57% and 0.55% as of September 30, 2018, December 31, 2017 and September 30, 2017, respectively.

The following tables summarize the activity in the allowance for loan losses by portfolio segment for the periods indicated. There were no allowance for loan losses related to PCI loans at December 31, 2017 and September 30, 2017.



	Nine Months Ended September 30, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	1,315	$	1,473	$	4,410	$	5,588		$	22		$	12,808
Provision (recapture) charged to earnings	552		324		1,726		2,633			4			5,239
Charge-offs	—		—		—		(150		)	(21		)	(171		)
Recoveries	—		—		—		33			—			33
Net charge-offs	—		—		—		(117		)	(21		)	(138		)
Balance at end of period	$	1,867	$	1,797	$	6,136	$	8,104		$	5		$	17,909
Period-end amount allocated to:
Specific reserves	—		—		—		378			—			378
PCI reserves	—		—		—		1,302			—			1,302
General reserves	1,867		1,797		6,136		6,424			5			16,229
Total	$	1,867	$	1,797	$	6,136	$	8,104		$	5		$	17,909



	For the 12/31/2017
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	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	—			(11		)	—		(819		)	—			(830		)
Balance at end of period	$	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



	For the 9/30/2017
	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	(252		)	415			973		1,462			(13		)	2,585
Charge-offs	—			(11		)	—		(611		)	—			(622		)
Recoveries	—			—			—		5			—			5
Net charge-offs (recoveries)	—			(11		)	—		(606		)	—			(617		)
Balance at end of period	$	1,163		$	1,520		$	3,976	$	3,811		$	22		$	10,492
Period-end amount allocated to:
Specific reserves	—			—			—		156			—			156
General reserves	1,163			1,520			3,976		3,655			22			10,336
Total	$	1,163		$	1,520		$	3,976	$	3,811		$	22		$	10,492

The Company’s recorded investment in loans as of September 30, 2018 and December 31, 2017 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows:



	September 30, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,107	$	160	$	366	$	2,929	$	66	$	5,628
Loans collectively evaluated for impairment	302,852		339,877		1,051,768		697,438		7,100		2,399,035
PCI loans	37		88		16,954		22,773		—		39,852
Total	$	304,996	$	340,125	$	1,069,088	$	723,140	$	7,166	$	2,444,515



	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

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 condensed consolidated balance sheets and the related outstanding balances at September 30, 2018 and 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.



	September 30, 2018		December 31, 2017
Carrying amount	$	39,852	$	47,612
Outstanding balance	50,781		63,940

Changes in the accretable yield for PCI loans for the three and nine months ended September 30, 2018 are included in table below. There was no accretable yield balance for PCI loans for the three or nine months ended September 30, 2017 as management was still evaluating the non-accretable and accretable difference associated with the Sovereign acquisition.



	Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018
Balance at beginning of period	$	7,335		$	2,723
Purchase accounting adjustments	—			1,459
Reclassifications from nonaccretable	278			6,499
Accretion	(820		)	(3,888		)
Balance at end of period	$	6,793		$	6,793

In addition, during the three and nine months ended September 30, 2018, the Company received cash collections in excess of expected cash flows on PCI loans of $1,999 and $3,759, respectively. There were no cash collections in excess of expected cash flows on PCI loans for the three or nine months ended September 30, 2017.

Servicing Assets

The Company was servicing loans of approximately $71,609 and $44,720 as of September 30, 2018 and 2017, respectively. A summary of the changes in the related servicing assets are as follows:



	Nine Months Ended September 30,
	2018			2017
Balance at beginning of period	$	1,215		$	601
Servicing asset acquired through acquisition	—			454
Increase from loan sales	204			273
Amortization charged to income	(278		)	(130		)
Balance at end of period	$	1,141		$	1,198

The estimated fair value of the servicing assets approximated the carrying amount at September 30, 2018, December 31, 2017 and September 30, 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 September 30, 2018 and 2017, there was no valuation allowance recorded.

The Company may also receive a portion of subsequent interest collections on loans sold that exceed the contractual servicing fees. 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 September 30, 2018 and December 31, 2017.

- 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

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s tax provision was $7,309 and $5,802 resulting in an effective tax rate of 19.8% and 32.8%, respectively, for the nine months ended September 30, 2018 and 2017. The Company’s effective tax rate, before the net impact of discrete items, was approximately 20.2% and 34.4% for the nine months ended September 30, 2018 and 2017, respectively. The decrease in the effective tax rate in the comparative periods was primarily due to the enactment of the Tax Cuts and Jobs Act (the “Tax Act”) on December 22, 2017, which lowered the Company’s federal statutory tax rate, effective on January 1, 2018. The Company’s provision for the nine months ended September 30, 2018 was primarily impacted by a discrete tax expense totaling $722 as a result of the Company re-measuring its deferred taxes upon finalization of the fair value estimates of the deferred tax assets acquired in the Sovereign and Liberty acquisitions during the nine months ended September 30, 2018. For further information, see Note 12 – “Business Combinations”. The discrete tax provision was partially offset by a net discrete tax benefit of $688 resulting from the Company’s revised estimate of deferred taxes based on the finalization of its 2017 U.S. federal income tax return and $168 of a discrete tax benefit from the recognition of excess tax benefits on share-based payment awards during the nine months ended September 30, 2018. The revision in the estimate of deferred taxes primarily related to bank premises and equipment as the Company completed a cost segregation study on its corporate building for the 2017 tax return during the nine months ended September 30, 2018. For the nine months ended September 30, 2017, the Company’s provision was impacted by a net discrete tax benefit of $285 primarily associated with the recognition of excess tax benefit on share-based payment awards. The Company’s tax provision was $1,448 and $2,650, resulting in an effective tax rate of 13.9% and 33.8%, respectively, for the three months ended September 30, 2018 and 2017. The Company’s effective tax rate, before the net impact of discrete tax items, was approximately 20.7% and 34.2% for the three months ended September 30, 2018 and 2017, respectively. The decrease in the effective tax rate in the comparative periods was primarily due to the enactment of the Tax Act, as discussed above. The Company’s provision for the three months ended September 30, 2018 was primarily impacted by discrete tax benefits from the $688 revision in estimated deferred taxes discussed above and $12 from the recognition of excess tax benefits on share-based payment awards. For the three months ended September 30, 2017, the Company’s provision was impacted by a net discrete tax benefit of $30 primarily associated with the recognition of excess tax benefit on share-based payment awards. The Company has finalized its evaluation of the authoritative guidance of the Tax Act and interpretation of the Tax Act by regulatory bodies and does not expect any additional material impact.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

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 the ultimate liability, if any, resulting from these actions will not materially affect the financial position or results of operations of the Company.

Lessee: Cease-Use Liability

As part of the Sovereign acquisition and the Company’s evaluation of its acquired facilities owned or leased for ongoing economic benefit, a decision was made to cease using two acquired leases in the fourth quarter of 2017 for leases that expire between 2026 and 2029. In accordance with accounting for exit and disposal activities, the Company recognized a liability in 2017 for lease exit costs incurred when it no longer derived economic benefits from the related leases. In January 2018, the Company entered into an assignment agreement to assign one of its branch leases to a third party for one of the two leases that the Company ceased using during 2017. As a result of the lease assignment, the Company reversed $669 of the cease-use liability during the nine months ended September 30, 2018.

A cease-use liability of $674 and $1,407 is included in accrued interest payable and other liabilities in the condensed consolidated balance sheets as of September 30, 2018 and December 31, 2017, respectively. The below table is a roll-forward of the cease-use liability from December 31, 2017 to September 30, 2018.



	Cease-Use Liability
Balance at December 31, 2017	$	1,407
Payments	(64		)
Reversal upon lease assignment	(669		)
Balance at September 30, 2018	$	674

Qualified Affordable Housing Investment

Starting in 2017, the Company began investing in certain qualified housing projects. As of September 30, 2018 and December 31, 2017, the balance of the investment for qualified affordable housing projects was $3,759 and $1,982, respectively. This balance is reflected in non-marketable equity securities on the condensed consolidated balance sheets. The total unfunded commitment related to the investment in certain qualified housing projects totaled $3,020 and $1,765 as of September 30, 2018 and December 31, 2017, respectively. The Company expects to fulfill these commitments during the year ended 2034.

Fair Value Disclosures

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Disclosures

The following table summarizes assets measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:



	Fair Value Measurements Using
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
As of September 30, 2018
Investment securities available for sale	$	—	$	256,237	$	—	$	256,237
As of December 31, 2017
Investment securities available for sale	$	—	$	228,117	$	—	$	228,117

There were no liabilities measured at fair value on a recurring basis as of September 30, 2018 or December 31, 2017.

There were no transfers between Level 2 and Level 3 during the nine months ended September 30, 2018 and 2017.

The following table summarizes assets measured at fair value on a non-recurring basis as of September 30, 2018 and December 31, 2017, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:



	Fair Value Measurements Using
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
As of September 30, 2018
Assets:
Impaired loans⁽¹⁾	$	—	$	—	$	19,792	$	19,792
As of December 31, 2017
Assets:
Impaired loans	$	—	$	—	$	116	$	116
Other real estate owned	$	—	$	—	$	449	$	449

⁽¹⁾Impaired loans include $17,158 of PCI loans.

At September 30, 2018, impaired loans had a carrying value of $19,792, with $1,680 specific allowance for loan loss allocated. At December 31, 2017, impaired loans had a carrying value of $116, with $12 specific allowance for loan loss allocated.

There were no liabilities measured at fair value on a non-recurring basis as of September 30, 2018 or December 31, 2017.

For Level 3 financial assets measured at fair value as of September 30, 2018 and December 31, 2017, the significant unobservable inputs used in the fair value measurements were as follows:



September 30, 2018
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	19,792	Collateral Method	Adjustments for selling costs	8	%



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	%

Fair Value of Financial Instruments

Please refer to Note 16 of the Company’s 2017 Annual Report on Form 10-K for its methods of determining the fair value of financial instruments presented in this Note. The methods are consistent with its methodologies disclosed in the Company’s 2017 Annual Report on Form 10-K, except for the valuation of loans which was impacted by the adoption of ASU 2016-01. In accordance with ASU 2016-01, the fair value of loans, excluding previously presented impaired loans measured at fair value on a non-recurring basis, is estimated using a discounted cash flow analyses. The discount rates used to determine fair value use interest rate spreads that reflect factors such as liquidity, credit, and prepayment risk of the loans. Loans are considered a Level 3 classification.

The estimated fair values and carrying values of all financial instruments under current authoritative guidance as of September 30, 2018 and December 31, 2017 were as follows:



			Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
September 30, 2018
Financial assets:
Cash and cash equivalents	$	261,790	$	—	$	261,790	$	—
Loans held for sale	1,425		—		1,425		—
Loans, net	2,426,590		—		—		2,443,749
Accrued interest receivable	8,291		—		8,291		—
Bank-owned life insurance	21,915		—		21,915		—
Servicing asset	1,141		—		1,141		—
Non-marketable equity securities	352		—		352		—
Financial liabilities:
Deposits	$	2,656,254	$	—	$	2,576,838	$	—
Advances from FHLB	73,055		—		73,100		—
Accrued interest payable	988		—		988		—
Junior subordinated debentures	11,702		—		11,702		—
Subordinated notes	4,989		—		4,989		—
December 31, 2017
Financial assets:
Cash and cash equivalents	$	149,044	$	—	$	149,044	$	—
Loans held for sale	841		—		841		—
Loans, net	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		—

- 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

9 Months Ended

Sep. 30, 2018

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 condensed 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 September 30, 2018 and December 31, 2017:



	September 30,		December 31,
	2018		2017
Commitments to extend credit	$	860,931	$	606,451
Standby and commercial letters of credit	7,367		9,299
	$	868,298	$	615,750

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.

Stock and Incentive Plans

9 Months Ended

Sep. 30, 2018

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

Stock and Incentive Plans

2010 Stock Option and Equity Incentive Plan

During the nine months ended September 30, 2018 and 2017, the Company did not award any restricted stock units, non-performance based stock options or performance-based stock options under the 2010 Incentive Plan. Stock compensation expense related to the 2010 Incentive Plan recognized in the accompanying condensed consolidated statements of income totaled $11 and $21 for the three and nine months ended September 30, 2018 and $20 and $62 for the three and nine months ended September 30, 2017, respectively.

A summary of option activity under the 2010 Incentive Plan for the nine months ended September 30, 2018 and 2017, and changes during the periods then ended is presented below:



	2010 Incentive Plan
	Non-Performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2017	325,500		$	10.15	4.56 years
Exercised	(17,500	)	10.00
Outstanding at September 30, 2017	308,000		$	10.16	3.84 years
Options exercisable at September 30, 2017	297,000		$	10.12	3.77 years

Outstanding at January 1, 2018	305,000		$	10.16	3.59 years	$	5,316
Exercised	(11,500	)	10.48			204
Outstanding at September 30, 2018	293,500		$	10.15	2.78 years	$	5,315
Options exercisable at September 30, 2018	289,500		$	10.13	2.75 years	$	5,249

As of September 30, 2018, December 31, 2017 and September 30, 2017, there was approximately $4, $8 and $12, respectively, of unrecognized compensation expense related to non-performance based stock options. The unrecognized compensation expense at September 30, 2018 is expected to be recognized over the remaining weighted average requisite service period of 0.44 years.

A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of September 30, 2018 and 2017, and changes during the nine months then ended is as follows:



	2010 Incentive Plan
	Nonperformance-based restricted stock units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	27,750		$	11.92
Vested into shares	(1,000	)	10.85
Forfeited	(500	)	10.85
Outstanding at September 30, 2017	26,250		$	11.98

Outstanding at January 1, 2018	24,250		$	13.19
Vested into shares	(23,750	)	12.14
Forfeited	(500	)	10.85
Outstanding at September 30, 2018	—		$	—

As of September 30, 2018, December 31, 2017 and September 30, 2017 there was $4, $15 and $37 of total unrecognized compensation expense related to unvested 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 September 30, 2018 and 2017 is presented below:

2014 Omnibus Plan

During the nine months ended September 30, 2018, the Company awarded 54,650 non-performance based restricted stock units, 40,269 performance based restricted stock units, and 125,593 non-performance based stock options under the 2014 Omnibus Plan. During the nine months ended September 30, 2017, the Company awarded 37,625 non-performance based restricted stock units, 25,522 performance based restricted stock units and 70,440 non-performance-based stock options under the 2014 Omnibus Plan.

The non-performance options granted during the nine months ended September 30, 2018 vest equally over three years from the grant date. The performance based restricted stock units granted during the nine months ended September 30, 2018 include a performance criteria based on the Company’s total stockholder 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 date of grant. The non-performance restricted stock units granted during the nine months ended September 30, 2018 vest equally over a three-year period from the date of grant.

Compensation expense for option and restricted stock unit awards granted under the 2014 Omnibus Plan was approximately $928 and $3,054 for the three and nine months ended September 30, 2018 and $388 and $1,137 for the three and nine months ended September 30, 2017, 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 nine months ended September 30, 2018 and 2017:



	Nine Months Ended September 30
	2018	2017
Dividend yield	0.00%	0.00%
Expected life	5.0 to 7.5 years	5.0 to 7.5 years
Expected volatility	27.28% to 37.55%	31.60% to 37.55%
Risk-free interest rate	1.06% to 2.94%	1.06% to 2.32%

The expected life is based on the 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. 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 stock options under the 2014 Omnibus Plan as of September 30, 2018 and 2017, and changes during the nine months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2017	128,366		$	15.32	8.69 years
Granted	70,440		26.87
Forfeited	(3,465	)	21.24
Exercised	(1,544	)	15.00
Outstanding at September 30, 2017	193,797		$	19.34	8.45 years
Options exercisable at September 30, 2017	53,804		$	15.01	7.74 years

Outstanding at January 1, 2018	332,706		$	22.71	8.86 years	$	1,614
Granted	125,593		27.95
Forfeited	(2,076	)	27.59
Exercised	(1,983	)	14.95			26
Outstanding at September 30, 2018	454,240		$	24.12	8.42 years	$	1,858
Options exercisable at September 30, 2018	122,329		$	18.38	7.29 years	$	1,209
Weighted average fair value of options granted during the period			$	9.66

As of September 30, 2018, December 31, 2017 and September 30, 2017 there was $2,330, $1,958 and $832 of total unrecognized compensation expense related to options awarded under the 2014 Omnibus Plan, respectively. The unrecognized compensation expense at September 30, 2018 is expected to be recognized over the remaining weighted average requisite service period of 2.27 years.

A summary of the status of the Company’s non-performance based restricted stock units under the 2014 Omnibus Plan as of September 30, 2018 and 2017, and changes during the nine months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based
	Restricted Stock Units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	67,956		$	13.79
Granted	37,625		27.37
Vested into shares	(14,550	)	24.67
Forfeited	(2,250	)	27.93
Options exercisable at September 30, 2017	88,781		$	17.41

Outstanding at January 1, 2018	150,722		$	13.29
Granted	54,650		29.29
Vested into shares	(39,311	)	27.19
Forfeited	(3,929	)	26.85
Outstanding at September 30, 2018	162,132		$	23.85

A summary of the status of the Company’s performance based restricted stock units under the 2014 Omnibus Plan as of September 30, 2018 and 2017, and changes during the nine months then ended, is as follows:



	2014 Omnibus Plan
	Performance Based
	Restricted Stock Units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	51,197		$	8.72
Granted	25,522		24.34
Vested into shares	(19,861	)	15.34
Forfeited	(2,014	)	15.68
Options exercisable at September 30, 2017	54,844		$	13.33

Outstanding at January 1, 2018	53,594		$	8.72
Granted	40,269		27.59
Vested into shares	(26,623	)	18.83
Forfeited	(898	)	27.59
Outstanding at September 30, 2018	66,342		$	25.56

As of September 30, 2018, December 31, 2017 and September 30, 2017 there was $3,928, $3,592 and $1,805 of total unrecognized compensation 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 September 30, 2018 and 2017 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of September 30,
	2018	2017
Non-performance based stock options exercised	54	41
Non-performance based restricted stock units vested	1,173	395
Performance based restricted stock units vested	745	530

Significant Concentrations of Credit Risk	9 Months Ended
Significant Concentrations of Credit Risk	Sep. 30, 2018
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.

Capital Requirements and Restrictions on Retained Earnings

9 Months Ended

Sep. 30, 2018

Banking and Thrift [Abstract]

Capital Requirements and Restrictions on Retained Earnings

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 lead to the initiation of 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.

Quantitative measures established by regulation to ensure capital adequacy require the Company and 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 September 30, 2018 and December 31, 2017 that the Company and the Bank met all capital adequacy requirements to which they were subject.

As of September 30, 2018 and December 31, 2017, the Company’s and the Bank’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 and the Bank 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 September 30, 2018 that management believes have changed the Company’s categorization as “well capitalized.”

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 September 30, 2018
Total capital (to risk-weighted assets)
Company	$	381,915	13.22	%	$	231,113	8.0	%	n/a		n/a
Bank	340,023		11.75	%	231,505		8.0	%	$	289,381	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	359,054		12.43	%	173,316		6.0	%	n/a		n/a
Bank	322,113		11.13	%	173,646		6.0	%	231,528		8.0	%
Common equity tier 1 to risk-weighted assets
Company	347,353		12.02	%	130,041		4.5	%	n/a		n/a
Bank	322,113		11.13	%	130,234		4.5	%	188,116		6.5	%
Tier 1 capital (to average assets)
Company	359,054		11.74	%	122,335		4.0	%	n/a		n/a
Bank	322,113		10.53	%	122,360		4.0	%	152,950		5.0	%
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	%	11,791		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	%

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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 5: http://fasb.org/us-gaap/role/ref/legacyRef
-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 6: http://fasb.org/us-gaap/role/ref/legacyRef
-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 7: http://fasb.org/us-gaap/role/ref/legacyRef
-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 8: http://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

Business Combinations

9 Months Ended

Sep. 30, 2018

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, 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.

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 $111,301 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 following table presents the amounts recorded on the condensed consolidated balance sheets on the acquisition date of August 1, 2017, showing the estimated fair value as reported at December 31, 2017, the measurement period adjustments and the fair value determined to be final as of March 31, 2018.



	Estimate at December 31, 2017		Measurement Period Adjustments			Final Fair Value
Assets
Cash and cash equivalents	$	44,775	$	—		$	44,775
Investment securities	166,307		—			166,307
Loans	752,450		(4,622		)	747,828
Accrued interest receivable	3,102		—			3,102
Bank premises, furniture and equipment	17,805		474			18,279
Non-marketable equity securities	6,751		—			6,751
Other real estate owned	282		—			282
Intangible assets	8,454		749			9,203
Goodwill	109,091		2,210			111,301
Other assets	13,148		1,189			14,337
Total Assets	$	1,122,165	$	—		$	1,122,165

Liabilities
Deposits	$	809,366	$	—		$	809,366
Accounts payable and accrued expenses	6,284		—			6,284
Accrued interest payable and other liabilities	806		—			806
Advances from Federal Home Loan Bank	80,000		—			80,000
Junior subordinated debentures	8,609		—			8,609
Total liabilities	$	905,065	$	—		$	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 three and nine months ended September 30, 2018, the Company incurred no pre-tax merger and acquisition expenses related to the Sovereign acquisition. For the same periods in 2017, the company incurred $1,305 and $1,435, respectively, of pre-tax merger and acquisition expenses related to the Sovereign acquisition. Acquisition expenses are included in professional fees in the condensed 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	29,877		180,730		210,607
Consumer	—		1,252		1,252
Total fair value	47,585		700,243		747,828
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	$	85,125
Non-accretable difference	33,064
Cash flows expected to be collected	$	52,061
Accretable difference	4,476
Fair value of PCI loans	$	47,585

Intangible Assets

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



	Gross Intangible Assets
Core deposit intangibles⁽¹⁾	$	8,452
Servicing asset⁽²⁾	317
Intangible lease assets⁽³⁾	434
	$	9,203

⁽¹⁾ The Company estimated a useful life of 7.7 years for core deposit intangibles.

⁽²⁾The Company 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 estimated a weighted-average useful life of 5.0 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 Federal Home Loan Bank 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 2017. The redemption was approved by the Company’s primary federal regulator and was funded with the Company’s surplus capital. The redemption terminates the Company’s participation in the Small Business Lend Fund (“SBLF”) program.

Liberty Bancshares, Inc.

On December 1, 2017, the Company acquired 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 $23,281 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 following table presents the amounts recorded on the condensed consolidated balance sheets on the acquisition date of December 1, 2017, showing the estimated fair value as reported at December 31, 2017, the measurement period adjustments and the fair value determined to be final as of June 30, 2018.



	Estimate at December 31, 2017		Measurement Period Adjustments			Final Fair Value
Assets
Cash and cash equivalents	$	57,384	$	—		$	57,384
Investment securities	54,137		—			54,137
Loans	312,608		572			313,180
Accrued interest receivable	1,191		—			1,191
Bank premises, furniture and equipment	6,145		688			6,833
Non-marketable equity securities	2,096		—			2,096
Other real estate owned	166		—			166
Intangible assets	7,519		(1,705		)	5,814
Goodwill	23,496		(215		)	23,281
Other assets	2,509		617			3,126
Total assets	$	467,251	$	(43	)	$	467,208
Liabilities
Deposits	$	395,851	$	(303	)	$	395,548
Accounts payable and accrued expenses	1,287		260			1,547
Accrued interest payable and other liabilities	142		—			142
Subordinated notes⁽¹⁾	4,625		—			4,625
Total liabilities	$	401,905	$	(43	)	$	401,862

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

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

Acquisition-related Expenses

For the three months ended September 30, 2018, the Company incurred no pre-tax merger and acquisition expenses related to the Liberty acquisition and for the nine months ended September 30, 2018, incurred $335 of pre-tax merger and acquisition expenses related to the Liberty acquisition. The Company incurred $86 acquisition expenses related to the Liberty acquisition for the three and nine months ended September 30, 2017. 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	$	257,578	$	258,446
Commercial	307		49,695		50,002
Consumer	—		4,732		4,732
Total fair value	1,175		312,005		313,180
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 $5,814, which will be amortized on an accelerated basis over the estimated life of 10.0 years.

Pending Merger with Green Bancorp, Inc.

On July 23, 2018, the Company entered into a definitive agreement with Green Bancorp, Inc. (“Green”), the parent holding company for Green Bank, N.A. (“Green Bank”), in an all-stock merger valued at approximately $1,000,000. The agreement provides for the merger of Green and Green Bank with and into Veritex and Veritex Community Bank, respectively. Each share of Green common stock will be converted into the right to receive 0.79 shares of Veritex common stock upon closing. The closing of this transaction is subject to approval by the Company’s and Green’s shareholders, regulatory approvals and other customary closing conditions and is expected to occur in the first quarter of 2019.

Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

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



	As of September 30, 2018
	Weighted	Gross					Net
	Amortization	Intangible		Accumulated			Intangible
	Period	Assets		Amortization			Assets
Core deposit intangibles	8.1 years	$	16,051	$	3,944		$	12,107
Servicing asset	6.8 years	1,825		684			1,141
Intangible lease assets	2.8 years	5,282		1,927		—	3,355
		$	23,158	$	6,555		$	16,603



	As of December 31, 2017
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Assets		Amortization		Assets
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

For the nine months ended September 30, 2018 and September 30, 2017, amortization expense related to intangible assets of approximately $3,087 and $413, respectively, is included within amortization of intangibles, occupancy and equipment, and other income within the condensed consolidated statements of income.

Branch Assets and Liabilities Held For Sale

9 Months Ended

Sep. 30, 2018

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. The associated assets and liabilities were included in branch assets and liabilities held for sale as of December 31, 2017. On January 1, 2018, the Company completed the sale of these assets and liabilities to Horizon Bank, SSB (“Horizon”), resulting in a $33,557 cash settlement payment to Horizon during the three months ended March 31, 2018, which included the repayment of a $1,000 deposit liability recorded within other liabilities as of December 31, 2017, and the recognition of a $355 gain on the sale reported in other non-interest income for the nine months ended September 30, 2018. The completion of this sale resulted in the Company exiting the Austin metropolitan market.

In the fourth quarter of 2017, the Company ceased using one of its Dallas, Texas branch buildings. The associated building and improvements were included in branch assets held for sale as of December 31, 2017. On August 6, 2018, the Company completed the sale of the branch location to Texas Trust Credit Union (“Texas Trust”), resulting in a $1,747 cash settlement during the three months ended September 30, 2018, which included the recognition of a loss of $6 on the sale reported in other non-interest expenses.

The following table presents the assets and liabilities held for sale as of September 30, 2018 and December 31, 2017:



	September 30, 2018	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

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of Veritex and the Bank as its wholly-owned subsidiary. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”), but do not include all of the information and footnotes required for complete financial statements. Intercompany transactions and balances are eliminated in consolidation. In management’s opinion, these interim unaudited condensed consolidated financial statements include all adjustments of a normal recurring nature necessary for a fair statement of the Company’s condensed consolidated financial position at September 30, 2018 and December 31, 2017, condensed consolidated results of operations for the three and nine months ended September 30, 2018 and 2017, condensed consolidated stockholders’ equity for the nine months ended September 30, 2018 and 2017 and condensed consolidated cash flows for the nine months ended September 30, 2018 and 2017. Accounting measurements at interim dates inherently involve greater reliance on estimates than at year end and the results for the interim periods shown herein are not necessarily indicative of results to be expected for the full year due in part to global economic and financial market conditions, interest rates, access to sources of liquidity, market competition and interruptions of business processes. These interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2017 included within the Company’s Form 10-K as filed with the Securities and Exchange Commission on March 14, 2018. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions may also affect disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Segment Reporting	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	Reclassifications Some items in the prior year financial statements were reclassified to conform to the current presentation.
Revenue From Contracts With Customers	Revenue from Contracts with Customers The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous periods. The Company’s primary sources of revenue are derived from interest income on financial assets that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the Condensed Consolidated Statements of Income was not necessary. The Company generally fully satisfies its performance obligations under its contracts with customers as services are rendered and the transaction prices are typically fixed and charged either on a periodic basis or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved in applying Topic 606 that significantly affects the determination of the amount and timing of revenue from contracts with customers.
Earnings Per Share	Earnings Per Share Earnings per share (“EPS”) are based upon the weighted-average shares outstanding.
Adoption of New Accounting Standards and Recent Accounting Pronouncements	Adoption of New Accounting Standards In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which requires an entity to 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. The ASU replaces most existing revenue recognition guidance in GAAP. The new standard was effective for the Company on January 1, 2018. Adoption of ASU 2014-09 did not have a material impact on the Company’s condensed consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest income on financial assets that are not within the scope of ASU 2014-09. The Company’s revenue recognition pattern for revenue streams within the scope of ASU 2014-09, including but not limited to service charges on deposit accounts, did not change significantly from current practice. The standard permits the use of either the full retrospective or modified retrospective transition method. The Company elected to use the modified retrospective transition method which requires application of ASU 2014-09 to uncompleted contracts at the date of adoption. However, periods prior to the date of adoption will not be retrospectively revised as the impact of the ASU on uncompleted contracts at the date of adoption was not material. In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities” (“ASU 2016-01”), which 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. The adoption of ASU 2016-01 on January 1, 2018 did not have a material impact on the Company’s condensed consolidated financial statements. In accordance with (iv) above, the Company measured the fair value of its loan portfolio prospectively using an exit price notion. See Note 7 – “Fair Value Disclosures” for further information regarding the valuation of these loans. Recent Accounting Pronouncements 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 the process of evaluating the impact of this pronouncement, which is not expected to 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 2016-02, “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. Topic 842 was subsequently amended by ASU 2018-11, “Targeted Improvements.” ASU 2016-02 will require organizations that lease assets to recognize a right-of-use (“ROU”) asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (i) its effective date or (ii) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. If an entity chooses the second option, the transition requirements for existing leases also apply to leases entered into between the date of initial application and the effective date. The entity must also recast its comparative period financial statements and provide the disclosures required by the new standard for the comparative periods. We expect to adopt the new standard on January 1, 2019 and use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. ASU 2016-02 provides a number of optional practical expedients in transition. We expect to elect the ‘package of practical expedients’ as both the lessee and lessor, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. We currently expect to elect the short-term lease recognition exemption for leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets and leases liabilities for any lease that has a lease term at commencement date of 12 months or less and does not include a purchase option. We also currently expect to elect the practical expedient to not separate lease and non-lease components for all leases. We expect that this standard will have a material effect on our consolidated balance sheets but will not have a material impact on our consolidated statements of income. While we continue to assess all the effects of adoption, we currently believe the most significant effects relate to (i) the recognition of new ROU assets and lease liabilities on our balance sheet for our property and equipment operating leases and (ii) providing significant new disclosures about our lease activities. We do not expect a significant change in our leasing activities between now and adoption.

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

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 three and nine months ended September 30, 2018 and 2017:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Earnings (numerator)
Net income	$	8,935	$	5,182	$	29,516	$	11,895
Less: preferred stock dividends	—		42		—		42
Net income available to common stockholders	$	8,935	$	5,140	$	29,516	$	11,853
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS	24,176		19,976		24,151		16,813
Dilutive effect of employee stock-based awards	437		416		436		419
Adjusted weighted average shares outstanding	24,613		20,392		24,587		17,232
Earnings per share:
Basic	$	0.37	$	0.26	$	1.22	$	0.70
Diluted	$	0.36	$	0.25	$	1.20	$	0.69

Supplemental Statement of Cash Flows (Tables)

9 Months Ended

Sep. 30, 2018

Supplemental Cash Flow Elements [Abstract]

Schedule of Other Supplemental Cash Flow Information

Other supplemental cash flow information is presented below:



	Nine Months Ended September 30,
	2018			2017
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	19,939		$	6,714
Cash paid for income taxes	6,025			6,025
Supplemental Disclosures of Non-Cash Flow Information:
Net foreclosure of other real estate owned and repossessed assets	$	8		$	—
Non-cash assets acquired⁽¹⁾
Investment securities	$	—		$	166,307
Loans	(4,050		)	750,856
Accrued interest receivable	—			3,437
Bank premises, furniture and equipment	1,162			21,512
Non-marketable equity securities	—			6,751
Other real estate owned	—			282
Intangible assets	(956		)	8,662
Goodwill	1,995			108,967
Other assets	1,806			10,331
Total assets	$	(43	)	$	1,077,105
Non-cash liabilities assumed⁽¹⁾
Deposits	$	303		$	809,366
Accounts payable and accrued expenses⁽²⁾	—			5,189
Accrued interest payable and other liabilities	(260		)	1,616
Advances from Federal Home Loan Bank	—			80,000
Junior subordinated debentures	—			8,609
Total liabilities	43			904,780
Non-cash equity assumed
Preferred stock - series D	—			24,500
Total equity	—			24,500
5,117,642 shares of common stock issued in connection with acquisition	$	—		$	136,385

⁽²⁾ Accounts payable and accrued expenses included in accrued preferred stock dividends of $185.

Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

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 loss, and the fair value of securities are as follows:



	September 30, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available for Sale
U.S. government agencies	$	9,094	$	—	$	241	$	8,853
Corporate bonds	26,534		2		276		26,260
Municipal securities	43,309		12		543		42,778
Mortgage-backed securities	94,088		9		3,212		90,885
Collateralized mortgage obligations	89,162		12		2,238		86,936
Asset-backed securities	523		2		—		525
	$	262,710	$	37	$	6,510	$	256,237



	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized 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

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



	September 30, 2018
	Less Than 12 Months				12 Months or More				Totals
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for Sale
U.S. government agencies	$	8,352	$	215	$	501	$	26	$	8,853	$	241
Corporate bonds	23,556		276		—		—		23,556		276
Municipal securities	30,524		299		7,052		244		37,576		543
Mortgage-backed securities	49,926		1,507		39,483		1,705		89,409		3,212
Collateralized mortgage obligations	50,214		986		26,223		1,252		76,437		2,238
	$	162,572	$	3,283	$	73,259	$	3,227	$	235,831	$	6,510



	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

Schedule of Amortized Costs and Estimated Fair Values of Securities Available for Sale, By Contractual Maturity



	September 30, 2018
	Available For Sale
	Amortized Cost		Fair Value
Due in one year or less	$	2,401	$	2,401
Due from one year to five years	18,848		18,534
Due from five years to ten years	42,543		42,137
Due after ten years	15,145		14,819
	78,937		77,891
Mortgage-backed securities	94,088		90,885
Collateralized mortgage obligations	89,162		86,936
Asset-backed securities	523		525
	$	262,710	$	256,237



	December 31, 2017
	Available For Sale
	Amortized Cost		Fair 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

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 nine months ended September 30, 2018 and 2017 were as follows:



	Nine Months Ended September 30,
	2018		2017
Proceeds from sales	$	30,961	$	118,165
Gross realized gains	335		335
Gross realized losses	357		130

Loans and Allowance for Loan Losses (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Summary of Loans in the Accompanying Consolidated Balance Sheets

The outstanding balance represents the total amount owed, including accrued but unpaid interest, and any amounts previously charged off.



	September 30, 2018		December 31, 2017
Carrying amount	$	39,852	$	47,612
Outstanding balance	50,781		63,940



	Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018
Balance at beginning of period	$	7,335		$	2,723
Purchase accounting adjustments	—			1,459
Reclassifications from nonaccretable	278			6,499
Accretion	(820		)	(3,888		)
Balance at end of period	$	6,793		$	6,793

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



	September 30, 2018			December 31, 2017
Real estate:
Construction and land	$	294,143		$	277,825
Farmland	10,853			9,385
1 - 4 family residential	289,808			236,542
Multi-family residential	50,317			106,275
Commercial real estate	1,069,088			909,292
Commercial	723,140			684,551
Consumer	7,166			9,648
	2,444,515			2,233,518
Deferred loan fees	(16		)	(28		)
Allowance for loan losses	(17,909		)	(12,808		)
	$	2,426,590		$	2,220,682

Schedule of Non-Accrual Loans

Non-accrual loans aggregated by class of loans, as of September 30, 2018 and December 31, 2017, are as follows:



	Non-Accrual Loans
	September 30, 2018		December 31, 2017
Real estate:
Construction and land	$	2,107	$	—
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial real estate	—		61
Commercial	19,712		398
Consumer	3		6
	$	21,822	$	465

Schedule of Age Analysis of Past Due Loans, Aggregated by Class of Loans

An age analysis of past due loans, aggregated by class of loans, as of September 30, 2018 and December 31, 2017 is as follows:



	September 30, 2018
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current		PCI		Total Loans		Total 90 Days Past Due and Still Accruing⁽¹⁾
Real estate:
Construction and land	$	—	$	795	$	—	$	795	$	293,348	$	—	$	294,143	$	—
Farmland	—		—		—		—		10,816		37		10,853		—
1 - 4 family residential	426		35		—		461		289,259		88		289,808		—
Multi-family residential	—		—		—		—		50,317		—		50,317		—
Commercial real estate	1,340		2,661		259		4,260		1,047,874		16,954		1,069,088		259
Commercial	3,092		320		3,998		7,410		692,957		22,773		723,140		3,998
Consumer	23		—		45		68		7,098		—		7,166		45
	$	4,881	$	3,811	$	4,302	$	12,994	$	2,391,669	$	39,852	$	2,444,515	$	4,302

⁽¹⁾ Loans 90 days past due and still accruing excludes $267 of PCI loans as of September 30, 2018.



	December 31, 2017
	30 to 59 Days		60 to 89 Days		90 Days or Greater		Total Past Due		Total Current⁽¹⁾		PCI		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		9,232		49		9,385		—
1 - 4 family residential	1,274		139		—		1,413		235,030		99		236,542		—
Multi-family residential	—		—		—		—		106,275		—		106,275		—
Commercial real estate	1,830		—		—		1,830		890,145		17,317		909,292		—
Commercial	1,849		389		389		2,627		651,777		30,147		684,551		—
Consumer	39		51		18		108		9,540		—		9,648		18
	$	5,416	$	579	$	407	$	6,402	$	2,179,504	$	47,612	$	2,233,518	$	18

⁽²⁾ Loans 90 days past due and still accruing excludes $3,300 of PCI loans as of December 31, 2017.

Summary of Impaired Loans, Including Purchased Credit Impaired Loans and TDRs

Impaired loans and TDRs at September 30, 2018 and December 31, 2017 are summarized in the following tables.



	September 30, 2018⁽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	$	2,107	$	2,107	$	—	$	2,107	$	—	$	2,284
Farmland	—		—		—		—		—		—
1 - 4 family residential	160		160		—		160		—		160
Multi-family residential	—		—		—		—		—		—
Commercial real estate	366		366		—		366		—		370
Commercial	2,929		295		2,634		2,929		378		3,057
Consumer	66		66		—		66		—		74
Total	$	5,628	$	2,994	$	2,634	$	5,628	$	378	$	5,945

⁽¹⁾ ⁾ Loans reported exclude PCI loans.



	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⁾ Loans reported exclude PCI loans.

Troubled Debt Restructurings on Financing Receivables



				During the nine months ended September 30, 2018
				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
Real estate:
Construction and land	—	$	—	$	—	$	—	$	—	$	—
Farmland	—	—		—		—		—		—
1 - 4 family residential	—	—		—		—		—		—
Multi-family residential	—	—		—		—		—		—
Commercial real estate	—	—		—		—		—		—
Commercial	3	628		—		612		—		—
Consumer	—	—		—		—		—		—
Total	3	$	628	$	—	$	612	$	—	$	—

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 September 30, 2018 and December 31, 2017:



	September 30, 2018
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	289,816	$	2,220	$	2,107	$	—	$	—	$	294,143
Farmland	10,816		—		—		—		37		10,853
1 - 4 family residential	289,101		305		314		—		88		289,808
Multi-family residential	50,317		—		—		—		—		50,317
Commercial real estate	1,035,028		5,081		12,025		—		16,954		1,069,088
Commercial	685,727		7,022		7,618		—		22,773		723,140
Consumer	6,984		—		182		—		—		7,166
Total	$	2,367,789	$	14,628	$	22,246	$	—	$	39,852	$	2,444,515



	December 31, 2017
	Pass⁽¹⁾		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	235,781		462		200		—		99		236,542
Multi-family residential	106,275		—		—		—		—		106,275
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

Schedule of Analysis of the Allowance for Loan Losses

An analysis of the allowance for loan losses for the nine months ended September 30, 2018 and 2017 and year ended December 31, 2017 is as follows:



	Nine Months Ended September 30, 2018			Year Ended December 31, 2017			Nine Months Ended September 30, 2017
Balance at beginning of period	$	12,808		$	8,524		$	8,524
Provision charged to earnings	5,239			5,114			2,585
Charge-offs	(171		)	(839		)	(622		)
Recoveries	33			9			5
Net charge-offs	(138		)	(830		)	(617		)
Balance at end of period	$	17,909		$	12,808		$	10,492

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



	Nine Months Ended September 30, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	1,315	$	1,473	$	4,410	$	5,588		$	22		$	12,808
Provision (recapture) charged to earnings	552		324		1,726		2,633			4			5,239
Charge-offs	—		—		—		(150		)	(21		)	(171		)
Recoveries	—		—		—		33			—			33
Net charge-offs	—		—		—		(117		)	(21		)	(138		)
Balance at end of period	$	1,867	$	1,797	$	6,136	$	8,104		$	5		$	17,909
Period-end amount allocated to:
Specific reserves	—		—		—		378			—			378
PCI reserves	—		—		—		1,302			—			1,302
General reserves	1,867		1,797		6,136		6,424			5			16,229
Total	$	1,867	$	1,797	$	6,136	$	8,104		$	5		$	17,909



	For the 12/31/2017
	Real Estate
	Construction, Land and Farmland			Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	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	—			(11		)	—		(819		)	—			(830		)
Balance at end of period	$	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



	For the 9/30/2017
	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	(252		)	415			973		1,462			(13		)	2,585
Charge-offs	—			(11		)	—		(611		)	—			(622		)
Recoveries	—			—			—		5			—			5
Net charge-offs (recoveries)	—			(11		)	—		(606		)	—			(617		)
Balance at end of period	$	1,163		$	1,520		$	3,976	$	3,811		$	22		$	10,492
Period-end amount allocated to:
Specific reserves	—			—			—		156			—			156
General reserves	1,163			1,520			3,976		3,655			22			10,336
Total	$	1,163		$	1,520		$	3,976	$	3,811		$	22		$	10,492

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



	September 30, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,107	$	160	$	366	$	2,929	$	66	$	5,628
Loans collectively evaluated for impairment	302,852		339,877		1,051,768		697,438		7,100		2,399,035
PCI loans	37		88		16,954		22,773		—		39,852
Total	$	304,996	$	340,125	$	1,069,088	$	723,140	$	7,166	$	2,444,515



	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

Schedule of Summary of Changes in Servicing Assets

The Company was servicing loans of approximately $71,609 and $44,720 as of September 30, 2018 and 2017, respectively. A summary of the changes in the related servicing assets are as follows:



	Nine Months Ended September 30,
	2018			2017
Balance at beginning of period	$	1,215		$	601
Servicing asset acquired through acquisition	—			454
Increase from loan sales	204			273
Amortization charged to income	(278		)	(130		)
Balance at end of period	$	1,141		$	1,198

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Rollforward of Cease-use Liability

The below table is a roll-forward of the cease-use liability from December 31, 2017 to September 30, 2018.



	Cease-Use Liability
Balance at December 31, 2017	$	1,407
Payments	(64		)
Reversal upon lease assignment	(669		)
Balance at September 30, 2018	$	674

- Definition

Tabular disclosure of the loss contingencies that were reported in the period or disclosed as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14472-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14453-108349

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14615-108349

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12021-110248

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14394-108349

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12053-110248

+ Details

Fair Value Disclosures (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis



	Fair Value Measurements Using
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
As of September 30, 2018
Investment securities available for sale	$	—	$	256,237	$	—	$	256,237
As of December 31, 2017
Investment securities available for sale	$	—	$	228,117	$	—	$	228,117

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



	Fair Value Measurements Using
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
As of September 30, 2018
Assets:
Impaired loans⁽¹⁾	$	—	$	—	$	19,792	$	19,792
As of December 31, 2017
Assets:
Impaired loans	$	—	$	—	$	116	$	116
Other real estate owned	$	—	$	—	$	449	$	449

⁽¹⁾Impaired loans include $17,158 of PCI loans.

Schedule of Significant Unobservable Inputs Used in the Fair Value Measurements

For Level 3 financial assets measured at fair value as of September 30, 2018 and December 31, 2017, the significant unobservable inputs used in the fair value measurements were as follows:



September 30, 2018
			Valuation	Unobservable	Weighted
Assets/Liabilities	Fair Value		Technique	Input(s)	Average
Impaired loans	$	19,792	Collateral Method	Adjustments for selling costs	8	%



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	%

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 September 30, 2018 and December 31, 2017 were as follows:



			Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
September 30, 2018
Financial assets:
Cash and cash equivalents	$	261,790	$	—	$	261,790	$	—
Loans held for sale	1,425		—		1,425		—
Loans, net	2,426,590		—		—		2,443,749
Accrued interest receivable	8,291		—		8,291		—
Bank-owned life insurance	21,915		—		21,915		—
Servicing asset	1,141		—		1,141		—
Non-marketable equity securities	352		—		352		—
Financial liabilities:
Deposits	$	2,656,254	$	—	$	2,576,838	$	—
Advances from FHLB	73,055		—		73,100		—
Accrued interest payable	988		—		988		—
Junior subordinated debentures	11,702		—		11,702		—
Subordinated notes	4,989		—		4,989		—
December 31, 2017
Financial assets:
Cash and cash equivalents	$	149,044	$	—	$	149,044	$	—
Loans held for sale	841		—		841		—
Loans, net	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		—

Financial Instruments with Off-Balance Sheet Risk (Tables)

9 Months Ended

Sep. 30, 2018

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 September 30, 2018 and December 31, 2017:



	September 30,		December 31,
	2018		2017
Commitments to extend credit	$	860,931	$	606,451
Standby and commercial letters of credit	7,367		9,299
	$	868,298	$	615,750

Stock and Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2018

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

Summary of Option Activity

A summary of option activity under the 2010 Incentive Plan for the nine months ended September 30, 2018 and 2017, and changes during the periods then ended is presented below:



	2010 Incentive Plan
	Non-Performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2017	325,500		$	10.15	4.56 years
Exercised	(17,500	)	10.00
Outstanding at September 30, 2017	308,000		$	10.16	3.84 years
Options exercisable at September 30, 2017	297,000		$	10.12	3.77 years

Outstanding at January 1, 2018	305,000		$	10.16	3.59 years	$	5,316
Exercised	(11,500	)	10.48			204
Outstanding at September 30, 2018	293,500		$	10.15	2.78 years	$	5,315
Options exercisable at September 30, 2018	289,500		$	10.13	2.75 years	$	5,249

A summary of the status of the Company’s stock options under the 2014 Omnibus Plan as of September 30, 2018 and 2017, and changes during the nine months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2017	128,366		$	15.32	8.69 years
Granted	70,440		26.87
Forfeited	(3,465	)	21.24
Exercised	(1,544	)	15.00
Outstanding at September 30, 2017	193,797		$	19.34	8.45 years
Options exercisable at September 30, 2017	53,804		$	15.01	7.74 years

Outstanding at January 1, 2018	332,706		$	22.71	8.86 years	$	1,614
Granted	125,593		27.95
Forfeited	(2,076	)	27.59
Exercised	(1,983	)	14.95			26
Outstanding at September 30, 2018	454,240		$	24.12	8.42 years	$	1,858
Options exercisable at September 30, 2018	122,329		$	18.38	7.29 years	$	1,209
Weighted average fair value of options granted during the period			$	9.66

Summary of Status of the Company's Restricted Shares or Restricted Stock Units

A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of September 30, 2018 and 2017, and changes during the nine months then ended is as follows:



	2010 Incentive Plan
	Nonperformance-based restricted stock units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	27,750		$	11.92
Vested into shares	(1,000	)	10.85
Forfeited	(500	)	10.85
Outstanding at September 30, 2017	26,250		$	11.98

Outstanding at January 1, 2018	24,250		$	13.19
Vested into shares	(23,750	)	12.14
Forfeited	(500	)	10.85
Outstanding at September 30, 2018	—		$	—



	2014 Omnibus Plan
	Non-performance Based
	Restricted Stock Units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	67,956		$	13.79
Granted	37,625		27.37
Vested into shares	(14,550	)	24.67
Forfeited	(2,250	)	27.93
Options exercisable at September 30, 2017	88,781		$	17.41

Outstanding at January 1, 2018	150,722		$	13.29
Granted	54,650		29.29
Vested into shares	(39,311	)	27.19
Forfeited	(3,929	)	26.85
Outstanding at September 30, 2018	162,132		$	23.85



	2014 Omnibus Plan
	Performance Based
	Restricted Stock Units
	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2017	51,197		$	8.72
Granted	25,522		24.34
Vested into shares	(19,861	)	15.34
Forfeited	(2,014	)	15.68
Options exercisable at September 30, 2017	54,844		$	13.33

Outstanding at January 1, 2018	53,594		$	8.72
Granted	40,269		27.59
Vested into shares	(26,623	)	18.83
Forfeited	(898	)	27.59
Outstanding at September 30, 2018	66,342		$	25.56

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

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 September 30, 2018 and 2017 is presented below:

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 September 30, 2018 and 2017 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of September 30,
	2018	2017
Non-performance based stock options exercised	54	41
Non-performance based restricted stock units vested	1,173	395
Performance based restricted stock units vested	745	530

Schedule of Assumptions Used to Measure Fair Value of Each Option Award Estimated On Grant Date Using Black-Scholes Option-Pricing Model



	Nine Months Ended September 30
	2018	2017
Dividend yield	0.00%	0.00%
Expected life	5.0 to 7.5 years	5.0 to 7.5 years
Expected volatility	27.28% to 37.55%	31.60% to 37.55%
Risk-free interest rate	1.06% to 2.94%	1.06% to 2.32%

Capital Requirements and Restrictions on Retained Earnings (Tables)

9 Months Ended

Sep. 30, 2018

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 September 30, 2018
Total capital (to risk-weighted assets)
Company	$	381,915	13.22	%	$	231,113	8.0	%	n/a		n/a
Bank	340,023		11.75	%	231,505		8.0	%	$	289,381	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	359,054		12.43	%	173,316		6.0	%	n/a		n/a
Bank	322,113		11.13	%	173,646		6.0	%	231,528		8.0	%
Common equity tier 1 to risk-weighted assets
Company	347,353		12.02	%	130,041		4.5	%	n/a		n/a
Bank	322,113		11.13	%	130,234		4.5	%	188,116		6.5	%
Tier 1 capital (to average assets)
Company	359,054		11.74	%	122,335		4.0	%	n/a		n/a
Bank	322,113		10.53	%	122,360		4.0	%	152,950		5.0	%
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	%	11,791		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	%

Business Combinations (Tables)

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Schedule of Acquired Assets and Assumed Liabilities



	Estimate at December 31, 2017		Measurement Period Adjustments			Final Fair Value
Assets
Cash and cash equivalents	$	57,384	$	—		$	57,384
Investment securities	54,137		—			54,137
Loans	312,608		572			313,180
Accrued interest receivable	1,191		—			1,191
Bank premises, furniture and equipment	6,145		688			6,833
Non-marketable equity securities	2,096		—			2,096
Other real estate owned	166		—			166
Intangible assets	7,519		(1,705		)	5,814
Goodwill	23,496		(215		)	23,281
Other assets	2,509		617			3,126
Total assets	$	467,251	$	(43	)	$	467,208
Liabilities
Deposits	$	395,851	$	(303	)	$	395,548
Accounts payable and accrued expenses	1,287		260			1,547
Accrued interest payable and other liabilities	142		—			142
Subordinated notes⁽¹⁾	4,625		—			4,625
Total liabilities	$	401,905	$	(43	)	$	401,862

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

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



	Estimate at December 31, 2017		Measurement Period Adjustments			Final Fair Value
Assets
Cash and cash equivalents	$	44,775	$	—		$	44,775
Investment securities	166,307		—			166,307
Loans	752,450		(4,622		)	747,828
Accrued interest receivable	3,102		—			3,102
Bank premises, furniture and equipment	17,805		474			18,279
Non-marketable equity securities	6,751		—			6,751
Other real estate owned	282		—			282
Intangible assets	8,454		749			9,203
Goodwill	109,091		2,210			111,301
Other assets	13,148		1,189			14,337
Total Assets	$	1,122,165	$	—		$	1,122,165

Liabilities
Deposits	$	809,366	$	—		$	809,366
Accounts payable and accrued expenses	6,284		—			6,284
Accrued interest payable and other liabilities	806		—			806
Advances from Federal Home Loan Bank	80,000		—			80,000
Junior subordinated debentures	8,609		—			8,609
Total liabilities	$	905,065	$	—		$	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

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 Assets
Core deposit intangibles⁽¹⁾	$	8,452
Servicing asset⁽²⁾	317
Intangible lease assets⁽³⁾	434
	$	9,203

⁽¹⁾ The Company estimated a useful life of 7.7 years for core deposit intangibles.

⁽²⁾The Company 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 estimated a weighted-average useful life of 5.0 years for intangible lease assets which will be amortized on a straight line basis

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	29,877		180,730		210,607
Consumer	—		1,252		1,252
Total fair value	47,585		700,243		747,828
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	$	85,125
Non-accretable difference	33,064
Cash flows expected to be collected	$	52,061
Accretable difference	4,476
Fair value of PCI loans	$	47,585

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	$	257,578	$	258,446
Commercial	307		49,695		50,002
Consumer	—		4,732		4,732
Total fair value	1,175		312,005		313,180
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 (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

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



	As of September 30, 2018
	Weighted	Gross					Net
	Amortization	Intangible		Accumulated			Intangible
	Period	Assets		Amortization			Assets
Core deposit intangibles	8.1 years	$	16,051	$	3,944		$	12,107
Servicing asset	6.8 years	1,825		684			1,141
Intangible lease assets	2.8 years	5,282		1,927		—	3,355
		$	23,158	$	6,555		$	16,603



	As of December 31, 2017
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Assets		Amortization		Assets
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

Branch Assets and Liabilities Held For Sale Branch Assets and Liabilities Held For Sale (Tables)

9 Months Ended

Sep. 30, 2018

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Assets and Liabilities Held For Sale

The following table presents the assets and liabilities held for sale as of September 30, 2018 and December 31, 2017:



	September 30, 2018	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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109226691&loc=SL51724579-110230

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1474-107760

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5D
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721677-107760

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721533-107759

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721659-107760

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721665-107760

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5C
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721671-107760

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 4A
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721663-107760

+ Details

Summary of Significant Accounting Policies - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018 segment mortgage_office branch
Nature of Organization:
Number of reportable segments \| segment	1
Dallas-Fort Worth
Nature of Organization:
Number of branches	20
Number of mortgage offices \| mortgage_office	1
Houston
Nature of Organization:
Number of branches	1

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings (numerator)
Net income	$ 8,935	$ 5,182	$ 29,516	$ 11,895
Less: preferred stock dividends	0	42	0	42
Net income available to common stockholders	$ 8,935	$ 5,140	$ 29,516	$ 11,853
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS (thousands) (in shares)	24,176	19,976	24,151	16,813
Dilutive effect of employee stock based awards (in shares)	437	416	436	419
Adjusted weighted average shares outstanding (in shares)	24,613	20,392	24,587	17,232
Earnings per share:
Basic (in dollars per share)	$ 0.37	$ 0.26	$ 1.22	$ 0.70
Diluted (in dollars per share)	$ 0.36	$ 0.25	$ 1.20	$ 0.69

Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Excluded from diluted EPS weighted average shares (in shares)	0	0	0	0

Supplemental Statement of Cash Flows (Details) - USD ($) $ in Thousands			9 Months Ended
	Mar. 31, 2018	Aug. 08, 2017	Sep. 30, 2018	Sep. 30, 2017
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest			$ 19,939	$ 6,714
Cash paid for income taxes			6,025	6,025
Supplemental Disclosures of Non-Cash Flow Information:
Net foreclosure of other real estate owned and repossessed assets			8	0
Noncash assets acquired
Investment securities			0	166,307
Loans			(4,050)	750,856
Accrued interest receivable			0	3,437
Bank premises, furniture and equipment			1,162	21,512
Non-marketable equity securities			0	6,751
Other real estate owned			0	282
Intangible assets			(956)	8,662
Goodwill			1,995	108,967
Other assets			1,806	10,331
Total assets			(43)	1,077,105
Noncash liabilities assumed:
Deposits			303	809,366
Accounts payable and accrued expenses			0	5,189
Accrued interest payable and other liabilities			(260)	1,616
Advances from Federal Home Loan Bank			0	80,000
Junior subordinated debentures			0	8,609
Total liabilities			43	904,780
Stock redeemed or called during period, value			0	24,500
Noncash or part noncash acquisition, accrued preferred dividends assumed			$ 185
Stock issued during period, shares, acquisitions			5,117,642
Sovereign Bancshares, Inc.
Noncash liabilities assumed:
Stock redeemed or called during period, value	$ 24,500	$ 24,500
Business combination, consideration transferred, equity interests issued and issuable	$ 136,385		$ 0	136
Series D Preferred Stock \| Sovereign Bancshares, Inc.
Noncash liabilities assumed:
Stock redeemed or called during period, value		$ 24,727	$ 0	$ 24,500

Investment Securities - Carrying Amount and Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 262,710	$ 229,737
Gross Unrealized Gains	37	602
Gross Unrealized Losses	6,510	2,222
Fair Value	256,237	228,117
U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,094	10,829
Gross Unrealized Gains	0	9
Gross Unrealized Losses	241	18
Fair Value	8,853	10,820
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	26,534	17,500
Gross Unrealized Gains	2	330
Gross Unrealized Losses	276	0
Fair Value	26,260	17,830
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	43,309	55,499
Gross Unrealized Gains	12	189
Gross Unrealized Losses	543	211
Fair Value	42,778	55,477
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	94,088	91,734
Gross Unrealized Gains	9	58
Gross Unrealized Losses	3,212	1,068
Fair Value	90,885	90,724
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	89,162	53,559
Gross Unrealized Gains	12	9
Gross Unrealized Losses	2,238	925
Fair Value	86,936	52,643
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	523	616
Gross Unrealized Gains	2	7
Gross Unrealized Losses	0	0
Fair Value	$ 525	$ 623

Investment Securities - Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2018 USD ($) investment	Dec. 31, 2017 USD ($) investment
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	$ 162,572	$ 101,719
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	73,259	57,511
Debt securities, available-for-sale, continuous unrealized loss position	235,831	159,230
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	3,283	991
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	3,227	1,231
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	$ 6,510	$ 2,222
Number of investment positions in an unrealized loss position (investments) \| investment	170	118
U.S. government agencies
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	$ 8,352	$ 3,470
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	501	629
Debt securities, available-for-sale, continuous unrealized loss position	8,853	4,099
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	215	4
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	26	14
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	241	18
Corporate bonds
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	23,556
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	0
Debt securities, available-for-sale, continuous unrealized loss position	23,556
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	276
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	0
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	276
Municipal securities
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	30,524	14,593
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	7,052	7,092
Debt securities, available-for-sale, continuous unrealized loss position	37,576	21,685
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	299	79
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	244	132
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	543	211
Mortgage-backed securities
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	49,926	52,075
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	39,483	29,485
Debt securities, available-for-sale, continuous unrealized loss position	89,409	81,560
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	1,507	513
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	1,705	555
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	3,212	1,068
Collateralized mortgage obligations
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	50,214	31,581
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	26,223	20,305
Debt securities, available-for-sale, continuous unrealized loss position	76,437	51,886
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	986	395
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	1,252	530
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	$ 2,238	$ 925

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 2,401	$ 2,328
Due from one year to five years	18,848	29,654
Due from five years to ten years	42,543	34,480
Due after ten years	15,145	17,366
Total investment securities available for sale, single maturity date	78,937	83,828
Amortized Cost	262,710	229,737
Fair value
Due in one year or less	2,401	2,330
Due from one year to five years	18,534	29,991
Due from five years to ten years	42,137	34,474
Due after ten years	14,819	17,332
Total investment securities available for sale	77,891	84,127
Fair Value	256,237	228,117
Mortgage-backed securities
Amortized Cost
Amortized cost	94,088	91,734
Amortized Cost	94,088	91,734
Fair value
Fair value	90,885	90,724
Fair Value	90,885	90,724
Collateralized mortgage obligations
Amortized Cost
Amortized cost	89,162	53,559
Amortized Cost	89,162	53,559
Fair value
Fair value	86,936	52,643
Fair Value	86,936	52,643
Asset-backed Securities
Amortized Cost
Amortized cost	523	616
Amortized Cost	523	616
Fair value
Fair value	525	623
Fair Value	$ 525	$ 623

Investment Securities - Proceeds and Gross Gains/Losses (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Proceeds from sales of investment securities available for sale and gross gains and losses
Proceeds from sales	$ 30,961	$ 118,165
Gross realized gains	335	335
Gross realized losses	$ 357	$ 130

Loans and Allowance for Loan Losses - Balance Sheet Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Loans and Allowance for Loan Losses
Loans, gross	$ 2,444,515	$ 2,233,518
Deferred loan fees	(16)	(28)
Allowance for loan losses	(17,909)	(12,808)	$ (10,492)	$ (8,524)
Loans, net	2,426,590	2,220,682
Accretable discount related to loans acquired within a business combination	10,899	12,135
Loans and leases receivable, retained loans from loan sales, discount	1,635	1,189
Commercial
Loans and Allowance for Loan Losses
Loans, gross	723,140	684,551
Allowance for loan losses	(8,104)	(5,588)	(3,811)	(2,955)
Consumer
Loans and Allowance for Loan Losses
Loans, gross	7,166	9,648
Allowance for loan losses	(5)	(22)	(22)	(35)
Construction and land \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	294,143	277,825
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	10,853	9,385
Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	340,125	342,817
Allowance for loan losses	(1,797)	(1,473)	(1,520)	(1,116)
Commercial real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	1,069,088	909,292
Allowance for loan losses	(6,136)	(4,410)	$ (3,976)	$ (3,003)
1 - 4 family residential \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	289,808	236,542
Multi-family residential \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	$ 50,317	$ 106,275

Loans and Allowance for Loan Losses - Nonaccrual (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($) Loan	Dec. 31, 2017 USD ($)
Loans and Allowance for Loan Losses
Financing Receivable, Modifications, Subsequent Default, Number of Contracts \| Loan			0	0
Non-accrual loans	$ 21,822,000		$ 21,822,000		$ 465,000
Loans and leases receivable, impaired, interest lost on nonaccrual loans	331,000	$ 0	371,000	$ 0
Commercial
Loans and Allowance for Loan Losses
Non-accrual loans	19,712,000		19,712,000		398,000
Consumer
Loans and Allowance for Loan Losses
Non-accrual loans	3,000		3,000		6,000
Construction and land \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans	2,107,000		2,107,000		0
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans	0		0		0
Real estate \| 1 - 4 family residential \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans	0		0		0
Real estate \| Multifamily \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans	0		0		0
Commercial real estate \| Real Estate
Loans and Allowance for Loan Losses
Non-accrual loans	$ 0		0		61,000
PCI
Loans and Allowance for Loan Losses
Loans and leases receivable, impaired, interest lost on nonaccrual loans			$ 17,158,000		$ 0

Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Impaired Loans
Financing receivable, recorded investment, current	$ 2,391,669	$ 2,179,504
Unpaid Contractual Principal Balance	5,628	1,068
Recorded Investment with No Allowance	2,994	952
Recorded Investment With Allowance	2,634	116
Total Recorded Investment	5,628	1,068
Related Allowance	378	12
Average Recorded Investment YTD	5,945	1,194
Commercial
Impaired Loans
Financing receivable, recorded investment, current	692,957	651,777
Unpaid Contractual Principal Balance	2,929	398
Recorded Investment with No Allowance	295	282
Recorded Investment With Allowance	2,634	116
Total Recorded Investment	2,929	398
Related Allowance	378	12
Average Recorded Investment YTD	3,057	499
Consumer
Impaired Loans
Financing receivable, recorded investment, current	7,098	9,540
Unpaid Contractual Principal Balance	66	75
Recorded Investment with No Allowance	66	75
Recorded Investment With Allowance	0	0
Total Recorded Investment	66	75
Related Allowance	0	0
Average Recorded Investment YTD	74	87
Construction and land \| Real Estate
Impaired Loans
Financing receivable, recorded investment, current	293,348	277,505
Unpaid Contractual Principal Balance	2,107	0
Recorded Investment with No Allowance	2,107	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	2,107	0
Related Allowance	0	0
Average Recorded Investment YTD	2,284	0
Farmland \| Real Estate
Impaired Loans
Financing receivable, recorded investment, current	10,816	9,232
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 YTD	0	0
Commercial real estate \| Real Estate
Impaired Loans
Financing receivable, recorded investment, current	1,047,874	890,145
Unpaid Contractual Principal Balance	366	434
Recorded Investment with No Allowance	366	434
Recorded Investment With Allowance	0	0
Total Recorded Investment	366	434
Related Allowance	0	0
Average Recorded Investment YTD	370	445
1 - 4 family residential \| Real estate \| Real Estate
Impaired Loans
Financing receivable, recorded investment, current	289,259	235,030
Unpaid Contractual Principal Balance	160	161
Recorded Investment with No Allowance	160	161
Recorded Investment With Allowance	0	0
Total Recorded Investment	160	161
Related Allowance	0	0
Average Recorded Investment YTD	160	163
Multi-family residential \| Real estate \| Real Estate
Impaired Loans
Financing receivable, recorded investment, current	50,317	106,275
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 YTD	$ 0	$ 0

Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Credit Quality Indicators
Loans	$ 2,444,515	$ 2,233,518
Pass
Credit Quality Indicators
Loans	2,367,789	2,155,437
Special Mention
Credit Quality Indicators
Loans	14,628	28,209
Substandard
Credit Quality Indicators
Loans	22,246	2,144
Doubtful
Credit Quality Indicators
Loans	0	116
Commercial
Credit Quality Indicators
Loans	723,140	684,551
Commercial \| Pass
Credit Quality Indicators
Loans	685,727	634,796
Commercial \| Special Mention
Credit Quality Indicators
Loans	7,022	18,337
Commercial \| Substandard
Credit Quality Indicators
Loans	7,618	1,155
Commercial \| Doubtful
Credit Quality Indicators
Loans	0	116
Consumer
Credit Quality Indicators
Loans	7,166	9,648
Consumer \| Pass
Credit Quality Indicators
Loans	6,984	9,540
Consumer \| Special Mention
Credit Quality Indicators
Loans	0	0
Consumer \| Substandard
Credit Quality Indicators
Loans	182	108
Consumer \| Doubtful
Credit Quality Indicators
Loans	0	0
Construction and land \| Real Estate
Credit Quality Indicators
Loans	294,143	277,825
Construction and land \| Real Estate \| Pass
Credit Quality Indicators
Loans	289,816	277,186
Construction and land \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	2,220	639
Construction and land \| Real Estate \| Substandard
Credit Quality Indicators
Loans	2,107	0
Construction and land \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Farmland \| Real Estate
Credit Quality Indicators
Loans	10,853	9,385
Farmland \| Real Estate \| Pass
Credit Quality Indicators
Loans	10,816	9,336
Farmland \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	0	0
Farmland \| Real Estate \| Substandard
Credit Quality Indicators
Loans	0	0
Farmland \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Real estate \| Real Estate
Credit Quality Indicators
Loans	340,125	342,817
Real estate \| Multi-family residential \| Real Estate
Credit Quality Indicators
Loans	50,317	106,275
Real estate \| Multi-family residential \| Real Estate \| Pass
Credit Quality Indicators
Loans	50,317	106,275
Real estate \| Multi-family residential \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	0	0
Real estate \| Multi-family residential \| Real Estate \| Substandard
Credit Quality Indicators
Loans	0	0
Real estate \| Multi-family residential \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Real estate \| Single Family \| Real Estate
Credit Quality Indicators
Loans	289,808	236,542
Real estate \| Single Family \| Real Estate \| Pass
Credit Quality Indicators
Loans	289,101	235,781
Real estate \| Single Family \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	305	462
Real estate \| Single Family \| Real Estate \| Substandard
Credit Quality Indicators
Loans	314	200
Real estate \| Single Family \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Commercial real estate \| Real Estate
Credit Quality Indicators
Loans	1,069,088	909,292
Commercial real estate \| Real Estate \| Pass
Credit Quality Indicators
Loans	1,035,028	882,523
Commercial real estate \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	5,081	8,771
Commercial real estate \| Real Estate \| Substandard
Credit Quality Indicators
Loans	12,025	681
Commercial real estate \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
PCI loans
Credit Quality Indicators
Loans	50,781	63,940
PCI loans \| PCI
Credit Quality Indicators
Loans	39,852	47,612
PCI loans \| Commercial \| PCI
Credit Quality Indicators
Loans	22,773	30,147
PCI loans \| Consumer \| PCI
Credit Quality Indicators
Loans	0	0
PCI loans \| Construction and land \| Real Estate \| PCI
Credit Quality Indicators
Loans	0	0
PCI loans \| Farmland \| Real Estate \| PCI
Credit Quality Indicators
Loans	37	49
PCI loans \| Real estate \| Multi-family residential \| Real Estate \| PCI
Credit Quality Indicators
Loans	0	0
PCI loans \| Real estate \| Single Family \| Real Estate \| PCI
Credit Quality Indicators
Loans	88	99
PCI loans \| Commercial real estate \| Real Estate \| PCI
Credit Quality Indicators
Loans	$ 16,954	17,317
Scenario, Adjustment \| Real estate \| Multi-family residential \| Real Estate \| Pass
Credit Quality Indicators
Loans		15,123
Scenario, Adjustment \| Real estate \| Single Family \| Real Estate \| Pass
Credit Quality Indicators
Loans		$ (15,123)

Loans and Allowance for Loan Losses - Allowance (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Analysis of allowance for loan losses
Balance at beginning of period	$ 12,808,000	$ 8,524,000	$ 8,524,000
Provision (recapture) charged to earnings	5,239,000	2,585,000	5,114,000
Charge-offs	(171,000)	(622,000)	(839,000)
Recoveries	33,000	5,000	9,000
Net charge-offs	(138,000)	(617,000)	(830,000)
Balance at end of period	17,909,000	10,492,000	12,808,000
Allowance for loan losses (as a percent)				0.73%	0.57%	0.55%
Specific reserves
Total specific reserves				$ 378,000	$ 12,000	$ 156,000
General reserves				16,229,000	12,796,000	10,336,000
Total	12,808,000	8,524,000	8,524,000	17,909,000	12,808,000	10,492,000
Commercial
Analysis of allowance for loan losses
Balance at beginning of period	5,588,000	2,955,000	2,955,000
Provision (recapture) charged to earnings	2,633,000	1,462,000	3,452,000
Charge-offs	(150,000)	(611,000)	(828,000)
Recoveries	33,000	5,000	9,000
Net charge-offs	(117,000)	(606,000)	(819,000)
Balance at end of period	8,104,000	3,811,000	5,588,000
Specific reserves
Total specific reserves				378,000	12,000	156,000
General reserves				6,424,000	5,576,000	3,655,000
Total	5,588,000	2,955,000	2,955,000	8,104,000	5,588,000	3,811,000
Consumer
Analysis of allowance for loan losses
Balance at beginning of period	22,000	35,000	35,000
Provision (recapture) charged to earnings	4,000	(13,000)	(13,000)
Charge-offs	(21,000)	0	0
Recoveries	0	0	0
Net charge-offs	(21,000)	0	0
Balance at end of period	5,000	22,000	22,000
Specific reserves
Total specific reserves				0	0	0
General reserves				5,000	22,000	22,000
Total	22,000	35,000	35,000	5,000	22,000	22,000
Construction, Land and Farmland \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	1,315,000	1,415,000	1,415,000
Provision (recapture) charged to earnings	552,000	(252,000)	(100,000)
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Balance at end of period	1,867,000	1,163,000	1,315,000
Specific reserves
Total specific reserves				0	0	0
General reserves				1,867,000	1,315,000	1,163,000
Total	1,315,000	1,415,000	1,415,000	1,867,000	1,315,000	1,163,000
Residential \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	1,473,000	1,116,000	1,116,000
Provision (recapture) charged to earnings	324,000	415,000	368,000
Charge-offs	0	(11,000)	(11,000)
Recoveries	0	0	0
Net charge-offs	0	(11,000)	(11,000)
Balance at end of period	1,797,000	1,520,000	1,473,000
Specific reserves
Total specific reserves				0	0	0
General reserves				1,797,000	1,473,000	1,520,000
Total	1,473,000	1,116,000	1,116,000	1,797,000	1,473,000	1,520,000
Commercial real estate \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	4,410,000	3,003,000	3,003,000
Provision (recapture) charged to earnings	1,726,000	973,000	1,407,000
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Balance at end of period	6,136,000	3,976,000	4,410,000
Specific reserves
Total specific reserves				0	0	0
General reserves				6,136,000	4,410,000	3,976,000
Total	4,410,000	3,003,000	3,003,000	6,136,000	4,410,000	3,976,000
PCI loans
Analysis of allowance for loan losses
Balance at beginning of period	0
Balance at end of period		0	0
Specific reserves
Total specific reserves				1,302,000
Total	$ 0	$ 0	$ 0		$ 0	$ 0
PCI loans \| Commercial
Specific reserves
Total specific reserves				1,302,000
PCI loans \| Consumer
Specific reserves
Total specific reserves				0
PCI loans \| Construction, Land and Farmland \| Real Estate
Specific reserves
Total specific reserves				0
PCI loans \| Residential \| Real Estate
Specific reserves
Total specific reserves				0
PCI loans \| Commercial real estate \| Real Estate
Specific reserves
Total specific reserves				$ 0

Loans and Allowance for Loan Losses - Allowance, Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance, impairment methodology
Loans individually evaluated for impairment	$ 5,628	$ 1,068
Loans collectively evaluated for impairment	2,399,035	2,184,838
Total Loans	2,444,515	2,233,518
Commercial
Allowance, impairment methodology
Loans individually evaluated for impairment	2,929	398
Loans collectively evaluated for impairment	697,438	654,006
Total Loans	723,140	684,551
Consumer
Allowance, impairment methodology
Loans individually evaluated for impairment	66	75
Loans collectively evaluated for impairment	7,100	9,573
Total Loans	7,166	9,648
Construction, Land and Farmland \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	2,107	0
Loans collectively evaluated for impairment	302,852	287,161
Total Loans	304,996	287,210
Residential \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	160	161
Loans collectively evaluated for impairment	339,877	342,557
Total Loans	340,125	342,817
Commercial real estate \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	366	434
Loans collectively evaluated for impairment	1,051,768	891,541
Total Loans	1,069,088	909,292
PCI loans
Allowance, impairment methodology
Loans receivable, net	39,852	47,612
Total Loans	50,781	63,940
PCI loans \| Commercial
Allowance, impairment methodology
Loans receivable, net	22,773	30,147
PCI loans \| Consumer
Allowance, impairment methodology
Loans receivable, net	0	0
PCI loans \| Construction, Land and Farmland \| Real Estate
Allowance, impairment methodology
Loans receivable, net	37	49
PCI loans \| Residential \| Real Estate
Allowance, impairment methodology
Loans receivable, net	88	99
PCI loans \| Commercial real estate \| Real Estate
Allowance, impairment methodology
Loans receivable, net	$ 16,954	$ 17,317

Loans and Allowance for Loan Losses - PCI Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 2,444,515	$ 2,233,518
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable, net	39,852	47,612
Loans	$ 50,781	$ 63,940

Loans and Allowance for Loan Losses - PCI Accretable Yield Rollforward (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 7,335,000		$ 2,723,000
Purchase accounting adjustments	0		1,459,000
Reclassifications from nonaccretable	278,000		6,499,000
Accretion	(820,000)		(3,888,000)
Balance at end of period	6,793,000		6,793,000
Cash collections of certain loans acquired in transfer accounted for as debt securities	$ 1,999,000	$ 0	$ 3,759,000	$ 0

Loans and Allowance for Loan Losses - Servicing Assets (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Servicing Asset at Amortized Cost [Line Items]
Servicing asset	$ 71,609,000	$ 44,720,000
Summary of changes in related servicing assets
Balance at beginning of period	1,215,000	601,000
Servicing asset acquired through acquisition	0	454,000
Increase from loan sales	204,000	273,000
Amortization charged to income	(278,000)	(130,000)
Balance at end of period	1,141,000	1,198,000
Valuation allowance recorded	0	$ 0
Interest receivable	8,291,000		$ 7,676,000
Interest-only strip
Summary of changes in related servicing assets
Interest receivable	$ 0		$ 0

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Examination [Line Items]
Income tax expense (benefit)	$ 1,448	$ 2,650	$ 7,309	$ 5,802
Effective tax rate (as a percent)	13.90%	33.80%	19.80%	32.80%
Estimated annual effective tax rate (as a percent)	20.70%	34.20%	20.20%	34.40%
Income taxes receivable	$ 688		$ 688
Discrete tax benefit	12	$ 30	168	$ 285
Sovereign Bancshares, Inc and Liberty Bancshares, Inc.
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, change in enacted tax rate, amount	$ 722		$ 722

Commitments and Contingencies (Details) $ in Thousands	9 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($) lease	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Leases ceased \| lease		2
Loss Contingency Accrual [Roll Forward]
Qualified affordable housing investment			$ 3,759	$ 1,982
Qualified affordable housing project investments, unfunded commitment			3,020	1,765
Cease-Use
Loss Contingencies [Line Items]
Cease-use liability	$ 1,407	$ 1,407	$ 674	$ 1,407
Loss Contingency Accrual [Roll Forward]
December 31, 2017	1,407
Payments	(64)
Reversal upon lease assignment	(669)
September 30, 2018	$ 674	$ 1,407

Fair Value Disclosures - Recurring Basis (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Assets measured at fair value
Fair Value	$ 256,237,000		$ 228,117,000
Recurring
Assets measured at fair value
Fair Value	256,237,000		228,117,000
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 Inputs
Assets measured at fair value
Fair Value	0		0
Recurring \| Level 2 Inputs
Assets measured at fair value
Fair Value	256,237,000		228,117,000
Recurring \| Level 3 Inputs
Assets measured at fair value
Fair Value	$ 0		$ 0

Fair Value Disclosures - Non-recurring Basis (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Assets measured at fair value
Impaired loans, specific allowance	$ 1,680,000	$ 12,000
Level 3 Inputs
Assets measured at fair value
Other real estate owned		449,000
Non-recurring
Assets measured at fair value
Impaired loans	19,792,000	116,000
Other real estate owned		449,000
Liabilities measured at fair value	0	0
Non-recurring \| Level 1 Inputs
Assets measured at fair value
Impaired loans	0	0
Other real estate owned		0
Non-recurring \| Level 2 Inputs
Assets measured at fair value
Impaired loans	0	0
Other real estate owned		0
Non-recurring \| Level 3 Inputs
Assets measured at fair value
Impaired loans	19,792,000	116,000
Other real estate owned		$ 449,000
PCI loans \| Non-recurring
Assets measured at fair value
Impaired loans	$ 17,158,000

Fair Value Disclosures - Level 3 (Details) - Level 3 $ in Thousands	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, fair value disclosure	$ 19,792	$ 116
Other real estate owned		$ 449
Measurement Input, Cost to Sell \| Weighted Average \| Collateral Method
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, measurement input	0.08	0.08
Other real estate owned, measurement input		0.08

Fair Value Disclosures - Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial assets:
Financial instruments, assets held for sale		$ 31,828
Financial liabilities:
Junior subordinated debentures	$ 11,702	11,702
Subordinated notes	4,989	4,987
Other borrowings	0	15,000
Financial instruments, liabilities held for sale	0	64,627
Carrying Amount
Financial assets:
Cash and cash equivalents	261,790	149,044
Loans held for sale	1,425	841
Loans, net	2,426,590	2,220,682
Accrued interest receivable	8,291	7,676
Bank-owned life insurance	21,915	21,476
Servicing asset	1,141	1,243
Non-marketable equity securities	352	13,732
Financial liabilities:
Deposits	2,656,254	2,278,630
Advances from FHLB	73,055	71,164
Accrued interest payable	988	445
Junior subordinated debentures	11,702	11,702
Subordinated notes	4,989	4,987
Other borrowings		15,000
Financial instruments, liabilities held for sale		64,300
Level 1 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	0	0
Loans held for sale	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Non-marketable equity securities	0	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
Financial instruments, liabilities held for sale		0
Level 2 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	261,790	149,044
Loans held for sale	1,425	841
Loans, net	0
Accrued interest receivable	8,291	7,676
Bank-owned life insurance	21,915	21,476
Servicing asset	1,141	1,243
Non-marketable equity securities	352	13,732
Financial instruments, assets held for sale		5,515
Financial liabilities:
Deposits	2,576,838	2,164,498
Advances from FHLB	73,100	70,110
Accrued interest payable	988	445
Junior subordinated debentures	11,702	11,702
Subordinated notes	4,989	4,987
Other borrowings		15,000
Financial instruments, liabilities held for sale		64,300
Level 3 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	0	0
Loans held for sale	0	0
Loans, net	2,443,749	2,234,094
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Non-marketable equity securities	0	0
Financial instruments, assets held for sale		26,313
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
Financial instruments, liabilities held for sale		$ 0

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial instruments with off-balance sheet risk
Total commitments	$ 868,298	$ 615,750
Commitments to extend credit
Financial instruments with off-balance sheet risk
Total commitments	860,931	606,451
Standby and commercial letters of credit
Financial instruments with off-balance sheet risk
Total commitments	$ 7,367	$ 9,299

Stock and Incentive Plans - 2010 Plan (Details) - 2010 Stock Option and Equity Incentive Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 11	$ 20	$ 21	$ 62
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)			0	0
Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)			0	0
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)			0	0

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			9 Months Ended
	Jan. 01, 2018	Jan. 01, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Shares Underlying Options
Outstanding at beginning of period (in shares)	305,000	325,500	305,000	325,500
Exercised during the period (in shares)			(11,500)	(17,500)
Outstanding at the end of period (in shares)			293,500	308,000
Options exercisable at end of period (in shares)			289,500	297,000
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 10.16	$ 10.15	$ 10.16	$ 10.15
Exercised during the period (in dollars per share)			10.48	10.00
Outstanding at the end of period (in dollars per share)			10.15	10.16
Options exercisable at end of period (in dollars per share)			$ 10.13	$ 10.12
Weighted Average Contractual Term
Weighted average contractual term, outstanding	3 years 7 months 2 days	4 years 6 months 22 days	2 years 9 months 11 days	3 years 10 months 2 days
Weighted Average Contractual Term, exercisable			2 years 9 months	3 years 9 months 7 days
Additional disclosures
Aggregate intrinsic value of outstanding stock options			$ 5,315		$ 5,316
Aggregate intrinsic value of exercised stock options			204
Aggregate intrinsic value of exercisable stock options			5,249
Unrecognized compensation expense			$ 4	$ 12	$ 8
Requisite service period to recognize compensation cost			5 months 9 days
Non-performance based stock options exercised			$ 328	488
Non-performance based restricted stock units vested			$ 713	$ 26

Stock and Incentive Plans - 2010 Plan - Restricted Stock Units (Details) - Restricted Stock Units - 2010 Stock Option and Equity Incentive Plan - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Units
Nonvested at the beginning of the period (in shares)	24,250	27,750
Vested into shares (in shares)	(23,750)	(1,000)
Forfeited (in shares)	(500)	(500)
Nonvested at the end of the period (in shares)	0	26,250
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 13.19	$ 11.92
Vested into shares (in dollars per share)	12.14	10.85
Forfeited (in dollars per share)	10.85	10.85
Nonvested at the end of the period (in dollars per share)	$ 0.00	$ 11.98
Additional disclosures
Unrecognized compensation expense	$ 4	$ 37	$ 15

Stock and Incentive Plans - Omnibus Plan (Details) - Omnibus Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Non-performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)			54,650	37,625
Non-performance based restricted stock units \| Equal annual installments, tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)			40,269	25,522
Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)			125,593	70,440
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 928		$ 3,054
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 388		$ 1,137

Stock and Incentive Plans - Omnibus Plan Black Scholes Assumptions - (Details) - Omnibus Plan	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Dividend yield (as a percent)	0.00%	0.00%
Expected volatility, minimum (as a percent)	27.28%	31.60%
Expected volatility, maximum (as a percent)	37.55%	37.55%
Risk-free interest rate, minimum (as a percent)	1.06%	1.06%
Risk-free interest rate, maximum (as a percent)	2.94%	2.32%
Minimum
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Expected life	5 years	5 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	7 years 6 months

Stock and Incentive Plans - Omnibus Plan - Options (Details) - Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended
	Jan. 01, 2018	Jan. 01, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Nonperformance-based stock options
Shares Underlying Options
Outstanding at beginning of period (in shares)	332,706	128,366	332,706	128,366
Granted during the period (in shares)			125,593	70,440
Forfeited during the period (in shares)			(2,076)	(3,465)
Exercised during the period (in shares)			(1,983)	(1,544)
Outstanding at the end of period (in shares)			454,240	193,797
Options exercisable at end of period (in shares)			122,328.95	53,804
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 22.71	$ 15.32	$ 22.71	$ 15.32
Granted during the period (in dollars per share)			27.95	26.87
Forfeited during the period (in dollars per share)			27.59	21.24
Exercised during the period (in dollars per share)			14.95	15.00
Outstanding at the end of period (in dollars per share)			24.12	19.34
Options exercisable at end of period (in dollars per share)			18.38	$ 15.01
Weighted average fair value of options granted during the period (in dollars per share)			$ 9.66
Weighted Average Contractual Term
Weighted average contractual term, outstanding	8 years 10 months 10 days	8 years 8 months 9 days	8 years 5 months 1 day	8 years 5 months 12 days
Weighted Average Contractual Term, exercisable			7 years 3 months 15 days	7 years 8 months 27 days
Additional disclosures
Aggregate intrinsic value of outstanding stock options			$ 1,858		$ 1,614
Aggregate intrinsic value of exercised stock options			26
Aggregate intrinsic value of exercisable stock options			1,209
Stock option
Additional disclosures
Unrecognized compensation expense			$ 2,330	$ 832	$ 1,958
Requisite service period to recognize compensation cost			2 years 3 months 7 days

Stock and Incentive Plans - Omnibus Plan - Restricted Stock Units (Details) - Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Non-performance based restricted stock units
Units
Nonvested at the beginning of the period (in shares)	150,722	67,956
Granted (in shares)	54,650	37,625
Vested into shares (in shares)	(39,311)	(14,550)
Forfeited (in shares)	(3,929)	(2,250)
Nonvested at the end of the period (in shares)	162,132	88,781
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 13.29	$ 13.79
Granted (in dollars per share)	29.29	27.37
Vested into shares (in dollars per share)	27.19	24.67
Forfeited (in dollars per share)	26.85	27.93
Nonvested at the end of the period (in dollars per share)	$ 23.85	$ 17.41
Performance based restricted stock units
Units
Nonvested at the beginning of the period (in shares)	53,594	51,197
Granted (in shares)	40,269	25,522
Vested into shares (in shares)	(26,623)	(19,861)
Forfeited (in shares)	(898)	(2,014)
Nonvested at the end of the period (in shares)	66,342	54,844
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 8.72	$ 8.72
Granted (in dollars per share)	27.59	24.34
Vested into shares (in dollars per share)	18.83	15.34
Forfeited (in dollars per share)	27.59	15.68
Nonvested at the end of the period (in dollars per share)	$ 25.56	$ 13.33
Restricted Stock Units
Additional disclosures
Unrecognized compensation expense	$ 3,928	$ 1,805	$ 3,592

Stock and Incentive Plans - Fair Value Options Exercised or Restricted Stock Units Vested (Details) - Omnibus Plan - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Non-performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-performance based stock options exercised	$ 54	$ 41
Restricted stock units vested	1,173	395
Performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vested	$ 745	$ 530

Capital Requirements and Restrictions on Retained Earnings (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Total capital (to risk weighted assets)
Actual Amount	$ 381,915	$ 342,521
Actual Ratio (as a percent)	13.22%	13.16%
For Capital Adequacy Purposes Amount	$ 231,113	$ 208,219
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
Tier 1 capital (to risk weighted assets)
Actual Amount	$ 359,054	$ 324,726
Actual Ratio (as a percent)	12.43%	12.48%
For Capital Adequacy Purposes Amount	$ 173,316	$ 156,118
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
Common equity tier 1 to risk weighted assets
Actual Amount	$ 347,353	$ 313,024
Actual Ratio (as a percent)	12.02%	12.03%
For Capital Adequacy Purposes Amount	$ 130,041	$ 11,791
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%
Tier 1 capital (to average assets)
Actual Amount	$ 359,054	$ 324,726
Actual Ratio (as a percent)	11.74%	12.92%
For Capital Adequacy Purposes Amount	$ 122,335	$ 100,534
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
Bank
Total capital (to risk weighted assets)
Actual Amount	$ 340,023	$ 296,207
Actual Ratio (as a percent)	11.75%	11.37%
For Capital Adequacy Purposes Amount	$ 231,505	$ 208,413
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 289,381	$ 260,516
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	$ 322,113	$ 283,399
Actual Ratio (as a percent)	11.13%	10.88%
For Capital Adequacy Purposes Amount	$ 173,646	$ 156,286
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 231,528	$ 208,382
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	$ 322,113	$ 283,399
Actual Ratio (as a percent)	11.13%	10.88%
For Capital Adequacy Purposes Amount	$ 130,234	$ 117,215
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 188,116	$ 169,310
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	$ 322,113	$ 283,399
Actual Ratio (as a percent)	10.53%	11.28%
For Capital Adequacy Purposes Amount	$ 122,360	$ 100,496
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 152,950	$ 125,620
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	5.00%	5.00%

Business Combinations - Narrative (Details)					3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
Business Combinations - Narrative (Details)	Mar. 31, 2018 USD ($)	Dec. 01, 2017 USD ($) shares	Aug. 08, 2017 USD ($) $ / shares	Aug. 01, 2017 USD ($) shares	Mar. 31, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 161,447,000			$ 161,447,000		$ 159,452,000
Preferred stock - series D									0	$ 24,500,000
Payment of preferred stock dividends									0	227,000
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	111,301,000
Goodwill, expected to be tax deductible				$ 0
Merger-related expenses						0	$ 1,305,000		0	1,435,000
Advances from Federal Home Loan Bank	80,000,000
Preferred stock - series D	24,500,000		$ 24,500,000
Total fair value of consideration	$ 192,600,000
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						$ 25,009,000
Goodwill		23,281,000						23,281,000
Goodwill, expected to be tax deductible		$ 0
Merger-related expenses						$ 0	$ 86,000		335,000	86,000
Total fair value of consideration								$ 65,346,000
Series D Preferred Stock \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Shares to be converted, conversion ratio				1
Preferred stock - series D			$ 24,727,000						$ 0	$ 24,500,000
Liquidation per share value (USD per share) \| $ / shares			$ 1,000
Preferred stock dividends				$ 185,000
Payment of preferred stock dividends											$ 227,000
Scenario, Forecast \| Green Bank
Business Acquisition [Line Items]
Total fair value of consideration					$ 1,000,000,000
Business combination, common share conversion ratio \| shares					0.79

Business Combinations - Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands					6 Months Ended	8 Months Ended	9 Months Ended
	Mar. 31, 2018	Dec. 01, 2017	Aug. 08, 2017	Aug. 01, 2017	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Assets
Goodwill							$ 161,447		$ 159,452
Liabilities
Preferred stock - series D							0	$ 24,500
Sovereign Bancshares, Inc.
Assets
Cash and cash equivalents	$ 44,775					$ 44,775
Investment securities	166,307					166,307
Loans	747,828					747,828
Accrued interest receivable	3,102					3,102
Bank premises, furniture and equipment	18,279					18,279
Non-marketable equity securities	6,751					6,751
Other real estate owned	282					282
Intangible assets	9,203			$ 9,203		9,203
Goodwill	111,301					111,301
Other assets	14,337					14,337
Total Assets	1,122,165					1,122,165
Liabilities
Deposits	809,366					809,366
Accounts payable and accrued expenses	6,284					6,284
Accrued interest payable and other liabilities	806					806
Advances from Federal Home Loan Bank	80,000					80,000
Junior subordinated debentures	8,609					8,609
Total liabilities	905,065					905,065
Preferred stock - series D	24,500		$ 24,500
Consideration
Market value of common stock issued	136,385						$ 0	$ 136
Cash paid	56,215			56,215
Total fair value of consideration	$ 192,600
Loans						(4,622)
Bank premises, furniture and equipment						474
Intangible assets						749
Goodwill						2,210
Other assets						1,189
Total assets						$ 0
Liberty Bancshares, Inc.
Assets
Cash and cash equivalents					$ 57,384
Investment securities					54,137
Loans					313,180
Accrued interest receivable					1,191
Bank premises, furniture and equipment					6,833
Non-marketable equity securities					2,096
Other real estate owned					166
Intangible assets					5,814
Goodwill		$ 23,281			23,281
Other assets					3,126
Total Assets					467,208
Liabilities
Deposits					395,548
Accounts payable and accrued expenses					1,547
Accrued interest payable and other liabilities					142
Junior subordinated debentures					4,625
Total liabilities					401,862
Consideration
Market value of common stock issued					40,337
Cash paid		25,009			25,009
Total fair value of consideration					65,346
Loans					572
Bank premises, furniture and equipment					688
Intangible assets					(1,705)
Goodwill					(215)
Other assets					617
Total assets					(43)
Deposits					(303)
Accounts payable and accrued expenses					260
Total Liabilities					$ (43)
Previously Reported \| Sovereign Bancshares, Inc.
Assets
Cash and cash equivalents				44,775
Investment securities				166,307
Loans				752,450
Accrued interest receivable				3,102
Bank premises, furniture and equipment				17,805
Non-marketable equity securities				6,751
Other real estate owned				282
Intangible assets				8,454
Goodwill				109,091
Other assets				13,148
Total Assets				1,122,165
Liabilities
Deposits				809,366
Accounts payable and accrued expenses				6,284
Accrued interest payable and other liabilities				806
Advances from Federal Home Loan Bank				80,000
Junior subordinated debentures				8,609
Total liabilities				905,065
Preferred stock - series D				24,500
Consideration
Market value of common stock issued				136,385
Cash paid				56,215
Total fair value of consideration				$ 192,600
Previously Reported \| Liberty Bancshares, Inc.
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
Junior subordinated debentures		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

Business Combinations - Loans Acquired (Details) - USD ($) $ in Thousands	Dec. 01, 2017	Aug. 01, 2017
Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		$ 747,828
Contractual principal balance		775,056
Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	$ 313,180
Contractual principal balance	317,867
PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		47,585
Contractual principal balance		67,985
Contractually required principal and interest		85,125
Non-accretable difference		33,064
Cash flows expected to be collected		52,061
Accretable difference		4,476
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	258,446
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		210,607
Commercial \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	50,002
Commercial \| PCI loans \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		29,877
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	4,732
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		700,243
Contractual principal balance		707,071
Other Acquired Loans \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	312,005
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	257,578
Other Acquired Loans \| Commercial \| Sovereign Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value		180,730
Other Acquired Loans \| Commercial \| Liberty Bancshares, Inc.
Business Acquisition [Line Items]
Total fair value	49,695
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	$ 4,732

Business Combinations - Summary of Intangible Assets Acquired (Details) - USD ($) $ in Thousands	Dec. 01, 2017	Aug. 01, 2017	Jun. 30, 2018	Mar. 31, 2018
Sovereign Bancshares, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 9,203		$ 9,203
Sovereign Bancshares, Inc. \| Core deposit intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 8,452
Acquired intangible assets, weighted average useful life		7 years 8 months 12 days
Sovereign Bancshares, Inc. \| Servicing asset
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 317
Acquired 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
Acquired intangible assets, weighted average useful life		5 years
Liberty Bancshares, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets			$ 5,814
Liberty Bancshares, Inc. \| Core deposit intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 5,814
Acquired intangible assets, weighted average useful life	10 years

Intangible Assets - Summary Of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Asset	$ 23,158		$ 23,158		$ 23,909
Accumulated Amortization	6,555		6,555		3,468
Net Intangible Asset	16,603		16,603		$ 20,441
Amortization of intangibles	798	$ 223	$ 2,632	$ 413
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period			8 years 1 month 6 days		8 years 8 months 12 days
Gross Intangible Asset	16,051		$ 16,051		$ 17,007
Accumulated Amortization	3,944		3,944		2,694
Net Intangible Asset	12,107		$ 12,107		$ 14,313
Servicing asset
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period			6 years 9 months 22 days		6 years 9 months 18 days
Gross Intangible Asset	1,825		$ 1,825		$ 1,621
Accumulated Amortization	684		684		406
Net Intangible Asset	1,141		$ 1,141		$ 1,215
Intangible lease assets
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period			2 years 9 months 7 days		3 years 3 months 18 days
Gross Intangible Asset	5,282		$ 5,282		$ 5,281
Accumulated Amortization	1,927		1,927		368
Net Intangible Asset	$ 3,355		3,355		$ 4,913
Amortization Of Intangible Assets Occupancy And Equipment And Other Income
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles			$ 3,087

Branch Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire businesses, net of cash acquired			$ 31,810	$ 0
Deposits	$ 2,656,254		2,656,254		$ 2,278,630
Branch assets held for sale	0		0		33,552
Branch liabilities held for sale	0		0		64,627
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire businesses, net of cash acquired	1,747	$ 33,557
Deposits					1,000
Disposal group, not discontinued operation, gain (loss) on disposal	(6)		355
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	0		0		334
Loans	0		0		26,313
Accrued interest receivable	0		0		63
Bank premises, furniture and equipment	0		0		5,118
Intangible assets	0		0		1,724
Branch assets held for sale	0		0		33,552
Deposits	0		0		64,282
Accounts payable and accrued expenses	0		0		2
Deferred tax liability	0		0		327
Accrued interest payable and other liabilities	0		0		16
Branch liabilities held for sale	$ 0		$ 0		$ 64,627

Loans and Allowance for Loan Losses - Troubled Debt Restructuring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 Loan	Dec. 31, 2017 USD ($)
Financing Receivable, Modifications [Line Items]
Recorded investment for financing receivable, modifications	$ 1,207		$ 618
Number of loans modified as TDRs for which there was a payment default \| Loan	3	0
Financing receivable, modifications, pre-modification recorded investment	$ 628
Financing receivable, modifications, subsequent default, number of contracts, past due \| Loan	1
Financing receivable, modifications, subsequent default, number of contracts, modified terms \| Loan	2
Allowance for loan and leases acquired	$ 68
Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	612
Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Real Estate \| Construction and land
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
Real Estate \| Construction and land \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Construction and land \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Construction and land \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Construction and land \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Real Estate \| Farmland
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
Real Estate \| Farmland \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Farmland \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Farmland \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Farmland \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Real Estate \| Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
Real Estate \| Commercial real estate \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Commercial real estate \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Commercial real estate \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Real Estate \| Commercial real estate \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Commercial
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	3
Financing receivable, modifications, pre-modification recorded investment	$ 628
Commercial \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Commercial \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	612
Commercial \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Commercial \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
Consumer \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Consumer \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Consumer \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Consumer \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
1 - 4 family residential \| Real Estate \| Real estate
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
1 - 4 family residential \| Real Estate \| Real estate \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
1 - 4 family residential \| Real Estate \| Real estate \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
1 - 4 family residential \| Real Estate \| Real estate \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
1 - 4 family residential \| Real Estate \| Real estate \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0
Multi-family residential \| Real Estate \| Real estate
Financing Receivable, Modifications [Line Items]
Number of loans modified as TDRs for which there was a payment default \| Loan	0
Financing receivable, modifications, pre-modification recorded investment	$ 0
Multi-family residential \| Real Estate \| Real estate \| Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Multi-family residential \| Real Estate \| Real estate \| Extended Maturity
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Multi-family residential \| Real Estate \| Real estate \| Extended Maturity And Restructured Payments
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	0
Multi-family residential \| Real Estate \| Real estate \| Extended Maturity, Restructured Payments, and Adjusted Interest Rate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, post-modification recorded investment	$ 0

Loans and Allowance for Loan Losses - Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	$ 12,994	$ 6,402
Total Current	2,391,669	2,179,504
Total Loans	2,444,515	2,233,518
Total 90 days past due and still accruing	4,302	18
30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	4,881	5,416
60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,811	579
90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	4,302	407
Commercial
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	7,410	2,627
Total Current	692,957	651,777
Total Loans	723,140	684,551
Total 90 days past due and still accruing	3,998	0
Commercial \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,092	1,849
Commercial \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	320	389
Commercial \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,998	389
Consumer
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	68	108
Total Current	7,098	9,540
Total Loans	7,166	9,648
Total 90 days past due and still accruing	45	18
Consumer \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	23	39
Consumer \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	51
Consumer \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	45	18
Construction and land \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	795	320
Total Current	293,348	277,505
Total Loans	294,143	277,825
Total 90 days past due and still accruing	0	0
Construction and land \| Real Estate \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	320
Construction and land \| Real Estate \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	795	0
Construction and land \| Real Estate \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Farmland \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	104
Total Current	10,816	9,232
Total Loans	10,853	9,385
Total 90 days past due and still accruing	0	0
Farmland \| Real Estate \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	104
Farmland \| Real Estate \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Farmland \| Real Estate \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Loans	340,125	342,817
Commercial real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	4,260	1,830
Total Current	1,047,874	890,145
Total Loans	1,069,088	909,292
Total 90 days past due and still accruing	259	0
Commercial real estate \| Real Estate \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	1,340	1,830
Commercial real estate \| Real Estate \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	2,661	0
Commercial real estate \| Real Estate \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	259	0
1 - 4 family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	461	1,413
Total Current	289,259	235,030
Total Loans	289,808	236,542
Total 90 days past due and still accruing	0	0
1 - 4 family residential \| Real estate \| Real Estate \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	426	1,274
1 - 4 family residential \| Real estate \| Real Estate \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	35	139
1 - 4 family residential \| Real estate \| Real Estate \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Multi-family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Total Current	50,317	106,275
Total Loans	50,317	106,275
Total 90 days past due and still accruing	0	0
Multi-family residential \| Real estate \| Real Estate \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Multi-family residential \| Real estate \| Real Estate \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Multi-family residential \| Real estate \| Real Estate \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
PCI loans
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	39,852
Total Loans	50,781	63,940
PCI loans \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total 90 days past due and still accruing	267	3
PCI loans \| Commercial
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	22,773
PCI loans \| Consumer
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	0
PCI loans \| Construction and land \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	0
PCI loans \| Farmland \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	37
PCI loans \| Commercial real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	16,954
PCI loans \| 1 - 4 family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	88
PCI loans \| Multi-family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current	$ 0
Scenario, Adjustment \| 1 - 4 family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current		(15,123)
Scenario, Adjustment \| Multi-family residential \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Current		$ 15,123