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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	May 09, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	Veritex Holdings, Inc.
Entity Central Index Key	0001501570
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)		54,265,032
Document Fiscal Year Focus	2019
Entity Emerging Growth Company	false
Entity Small Business	false
Document Fiscal Period Focus	Q1

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 52,535	$ 19,598
Interest bearing deposits in other banks	286,938	64,851
Total cash and cash equivalents	339,473	84,449
Securities available-for-sale, at fair value	924,328	262,695
Securities held-to-maturity (fair value of $26,985 at March 31, 2019)	26,343	0
Trust Preferred Securities	1,018	352
Federal Reserve Bank stock	36,911	12,324
Federal Home Loan Bank of Dallas stock	16,767	2,957
Other investments	21,224	7,541
Total investments	1,026,591	285,869
Loans held for sale	8,002	1,258
Loans held for investment, mortgage warehouse	114,158	0
Loans held for investment	5,663,721	2,555,494
Total loans	5,785,881	2,556,752
Allowance for loan losses	(21,603)	(19,255)
Bank-owned life insurance	79,397	22,064
Bank premises, furniture and equipment, net	119,354	78,409
Other real estate owned	151	0
Intangible assets, net of accumulated amortization of $10,223 and $7,528, respectively	81,245	15,896
Goodwill	368,268	161,447
Other assets	69,474	22,919
Branch assets held for sale	83,516	0
Total assets	7,931,747	3,208,550
Deposits:
Noninterest-bearing deposits	1,439,630	626,283
Interest-bearing transaction and savings deposits	2,617,117	1,313,161
Certificates and other time deposits	2,240,968	682,984
Total deposits	6,297,715	2,622,428
Accounts payable and accrued expenses	41,459	5,413
Accrued interest payable	8,008	5,361
Advances from Federal Home Loan Bank	252,982	28,019
Subordinated debentures and subordinated notes	72,719	16,691
Securities sold under agreements to repurchase	2,778	0
Branch liabilities held for sale	62,381	0
Total liabilities	6,738,042	2,677,912
Commitments and contingencies (Note 16)
Stockholders’ equity:
Common stock, $0.01 par value; 75,000,000 shares authorized; 54,562,648 and 24,263,893 shares issued at March 31, 2019 and December 31, 2018, respectively; 54,236,048 and 24,253,894 shares outstanding at March 31, 2019 and December 31, 2018, respectively	546	243
Additional paid-in capital	1,109,386	449,427
Retained earnings	84,559	83,968
Accumulated other comprehensive income (loss)	7,016	(2,930)
Treasury stock, 326,600 and 10,000 shares at cost, respectively	(7,802)	(70)
Total stockholders’ equity	1,193,705	530,638
Total liabilities and stockholders’ equity	$ 7,931,747	$ 3,208,550

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held-to-maturity investments	$ 26,985
Intangible assets, accumulated amortization	$ 10,223	$ 7,528
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)	54,562,648	24,263,893
Common stock, shares outstanding (in shares)	54,236,048	24,253,894
Treasury stock, shares (in shares)	326,600	10,000

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest and dividend income:
Loans, including fees	$ 85,747	$ 32,067
Securities	7,232	1,328
Deposits in financial institutions and Fed Funds sold	1,554	687
Other investments	691	28
Total interest and dividend income	95,224	34,110
Interest expense:
Transaction and savings deposits	10,366	3,289
Certificates and other time deposits	8,792	1,004
Advances from FHLB	2,055	460
Subordinated debentures and subordinated notes	1,094	232
Total interest expense	22,307	4,985
Net interest income	72,917	29,125
Provision for loan losses	5,012	678
Net interest income after provision for loan losses	67,905	28,447
Noninterest income:
Service charges and fees on deposit accounts	3,517	933
Loan fees	1,677	274
(Loss) gain on sales of investment securities	(772)	8
Net gain on sales of loans and other assets owned	2,370	581
Rental income	368	478
Other	1,324	484
Total noninterest income	8,484	2,758
Noninterest expense:
Salaries and employee benefits	18,885	7,930
Occupancy and equipment	4,129	3,234
Professional and regulatory fees	3,418	2,104
Data processing and software expense	1,924	828
Marketing	619	461
Amortization of intangibles	2,760	978
Telephone and communications	395	426
Merger and acquisition expense	31,217	335
Other	3,646	1,010
Total noninterest expense	66,993	17,306
Net income from operations	9,396	13,899
Income tax expense	1,989	3,511
Net income	$ 7,407	$ 10,388
Basic earnings per share (in dollars per share)	$ 0.14	$ 0.43
Diluted earnings per share (in dollars per share)	$ 0.13	$ 0.42

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 7,407	$ 10,388
Other comprehensive income (loss):
Change in net unrealized gains (losses) on securities available-for-sale during the period	11,797	(2,943)
Reclassification adjustment for (losses) gains included in net income	(772)	8
Other comprehensive income (loss), before tax	12,569	(2,951)
Income tax expense (benefit)	2,623	(620)
Other comprehensive income (loss), net of tax	9,946	(2,331)
Comprehensive income	$ 17,353	$ 8,057

- 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	Green Bancorp, Inc.	Green Bancorp, Inc. Common Stock	Green Bancorp, Inc. Additional Paid-In Capital
Beginning balance (in shares) at Dec. 31, 2017		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)		34,068
Restricted stock units vested, net of shares withheld to cover tax withholdings	(269)		(269)
Exercise of employee stock options (in shares)		4,901
Exercise of employee stock options	(55)		(55)
Stock based compensation	771		771
Net income	10,388			10,388
Other comprehensive (loss) income	(2,331)				(2,331)
Ending balance (in shares) at Mar. 31, 2018		24,148,484
Ending balance at Mar. 31, 2018	$ 497,433	$ 241	445,964	55,015	(3,611)	(106)	(70)
Beginning balance (in shares) at Dec. 31, 2018	24,253,894	24,253,894
Beginning balance at Dec. 31, 2018	$ 530,638	$ 243	449,427	83,968	(2,930)	0	(70)
Increase (Decrease) in Stockholders' Equity
Issuance of common shares in connection to Green Bancshares, Inc. (Green) merger, net of offering costs of $788 (in shares)	5,117,642								29,532,957
Issuance of common shares in connection with the acquisition of Green Bancorp, Inc. (Green), net of offering costs of $788								$ 630,627	$ 295	$ 630,332
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		194,735							497,594
Restricted stock units vested, net of shares withheld to cover tax withholdings	$ (1,279)	$ 2	(1,281)					$ 12,484	$ 5	$ 12,479
Exercise of employee stock options (in shares)		73,468
Exercise of employee stock options	873	$ 1	872
Stock buyback (in shares)		(316,600)
Stock buyback	(7,732)	$ (3)					(7,729)
Stock based compensation	17,557		17,557
Net income	7,407			7,407
Dividends paid	(6,816)			(6,816)
Other comprehensive (loss) income	$ 9,946				9,946
Ending balance (in shares) at Mar. 31, 2019	54,236,048	54,236,048
Ending balance at Mar. 31, 2019	$ 1,193,705	$ 543	$ 1,109,386	$ 84,559	$ 7,016	$ 0	$ (7,799)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Offering costs	$ 788
Restricted Stock Units
Shares withheld to cover tax withholdings (in shares)	52,720	9,704,000
Employee Stock Options
Shares withheld to cover tax withholdings (in shares)	9,946	1,691,000
Shares paid for cashless exercise (in shares)		4,391,000
Green Bancorp, Inc. \| Restricted Stock Units
Shares withheld to cover tax withholdings (in shares)	25,872

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 7,407	$ 10,388
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,006	1,987
Net accretion of time deposit and debt premium	(2,936)	0
Provision for loan losses	5,012	678
Accretion of loan purchase discount	(6,516)	(1,823)
Stock-based compensation expense	17,557	771
Compensation expense - liability classified awards	708	0
Excess tax benefit from stock compensation	(25)	(84)
Net amortization of premiums on investment securities	502	491
Change in cash surrender value of bank-owned life insurance	(492)	(144)
Net loss (gain) on sales of investment securities	772	(8)
Change in fair value of held for sale Small Business Administration (SBA) loans using fair value option	(62)	0
Gain on sales of loans held for sale	(113)	(223)
Gain on sales of SBA loans	(2,195)	(358)
Net originations of loans held for sale	(6,918)	(9,965)
Write down on other real estate owned	0	156
Proceeds from sales of loans held for sale	9,709	10,136
Net gain on sale of branches	0	(355)
Change in fair value of equity securities	19	0
(Increase) decrease in accrued interest receivable and other assets	3,597	4,247
Decrease in accounts payable, accrued expenses and accrued interest payable	(12,156)	(2,625)
Net cash provided by operating activities	17,876	13,269
Cash flows from investing activities:
Cash received in excess of cash paid for the acquisition of Green	112,710	0
Cash settlement for sale of held for sale branches	0	(33,557)
Purchases of securities available for sale	(146,134)	(54,999)
Sales of securities available for sale	108,865	30,149
Proceeds from maturities, calls and pay downs of investment securities	21,620	6,369
Purchases of non-marketable equity securities, net	(12,478)	(7,074)
Net loans originated	6,244	(115,464)
Proceeds from sale of SBA loans	24,534	30,355
Net additions to bank premises and equipment	(2,590)	(295)
Proceeds from sales of other real estate owned	0	291
Net cash provided (used) in investing activities	112,771	(144,225)
Cash flows from financing activities:
Net change in deposits	214,816	215,466
Net change in advances from Federal Home Loan Bank	(75,037)	(23,036)
Net change in securities sold under agreement to repurchase	(448)	(15,000)
Payments to tax authorities for stock-based compensation	(1,279)	(324)
Proceeds from exercise of employee stock options	873	0
Purchase of treasury stock	(7,732)	0
Dividends paid	(6,816)	0
Net cash provided by financing activities	124,377	177,106
Net increase in cash and cash equivalents	255,024	46,150
Cash and cash equivalents at beginning of period	84,449	149,044
Cash and cash equivalents at end of period	$ 339,473	$ 195,194

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

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 28 branches and one mortgage office located in the Dallas-Fort Worth metroplex, thirteen branches in the Houston metropolitan area, one branch in the Austin metropolitan area and one branch in Louisville, Kentucky. 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, and perform periodic examinations to ensure regulatory compliance.

On January 1, 2019 (“close date”), the Company completed its acquisition of Green Bancorp, Inc. (“Green”), the parent holding company of Green Bank, N.A, a nationally chartered commercial bank headquartered in Houston, Texas with 21 full-service branches in the Houston, Dallas and other markets. See additional information on the acquisition in Note 19 - Business Combinations.

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 March 31, 2019 and December 31, 2018, condensed consolidated results of operations for the three months ended March 31, 2019 and 2018, condensed consolidated stockholders’ equity for the three months ended March 31, 2019 and 2018 and condensed consolidated cash flows for the three months ended March 31, 2019 and 2018.

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, 2018 included within the Company’s Form 10-K as filed with the Securities and Exchange Commission on February 27, 2019.

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 activity 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 Company’s prior year financial statements were reclassified to conform to the current presentation, including (i) the reclassification of dividend income from other noninterest income into interest on other investments in order to align with industry peers for comparability purposes and (ii) the reclassification of $335 from professional and regulatory fees to merger and acquisition expense on the condensed consolidated statements of income for the three months ended March 31, 2018.

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 months ended March 31, 2019 and 2018:



	Three Months Ended March 31,
	2019		2018
Earnings (numerator)
Net income	$	7,407	$	10,388
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS	54,293		24,120
Dilutive effect of employee stock-based awards	1,146		419
Adjusted weighted average shares outstanding	55,439		24,539
EPS:
Basic	$	0.14	$	0.43
Diluted	$	0.13	$	0.42

For the three months ended March 31, 2019 and 2018, there were no antidilutive shares excluded from the diluted EPS weighted average shares outstanding.

Certain Purchased Loans

The Company purchases individual loans and groups of loans, through both acquisitions of other banks and the normal course of its operations, some of which have shown evidence of credit deterioration since origination. These purchased credit impaired (“PCI”) loans are recorded at fair value at acquisition in a business combination, such that there is no carryover of the seller’s allowance for loan losses. After consummation of the acquisition, losses are recognized by an increase in the provision for loan losses.

These PCI loans are accounted for individually or aggregated into pools of loans based on common risk characteristics such as credit grade, loan type, and date of origination. On the date of acquisition, the Company estimates the amount and timing of expected cash flows for each purchased loan or pool, and the expected cash flows in excess of carrying value are recorded as interest income over the estimated life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference).

Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, except for present value changes solely due to changes in timing of cash flows, an impairment loss is recorded through the allowance for loan losses. If the present value of expected cash flows is greater than the carrying amount, any related allowance for loan loss is reversed, with the remaining yield being recognized prospectively through interest income.

Derivative Financial Instruments

The Company’s derivative instruments are entered into pursuant to a customer accommodation program under which the Company enters into an interest rate swap, cap agreement or an interest rate collar with a commercial customer and an agreement with offsetting terms with a correspondent bank. These derivative instruments are not designated as accounting hedges. Changes in net fair value are recognized in noninterest income or expense and the fair value amounts are included in other assets and other liabilities.

Loans Held for Sale

Loans are classified as held-for-sale when management has positively determined that the loans will be sold in the foreseeable future and the Company has the ability to do so. The Company’s held for sale loans typically consist of certain government guaranteed loans or mortgage loans. The classification may be made upon origination or subsequent to origination or purchase. Once a decision has been made to sell loans not previously classified as held-for-sale, such loans are transferred into the held-for-sale classification and carried at the lower of cost or estimated fair value on an individual loan basis, except for those held for sale loans for which the Company elects to use the fair value option. The fair value of loans held for sale is based on commitments from investors or prevailing market prices. For the Company’s accounting policy on loans held for sale which the fair value option is not elected refer to Note 1 in our Form 10-K for the year ended December 31, 2018.

Fair Value Option

On a specific identification basis, the Company may elect the fair value option for certain financial instruments in the period the financial instrument was originated or acquired. Changes in fair value for instruments using the fair value option are recorded in noninterest income.

Gain on Sale of Guaranteed Portion of Loans, Net

The Company originates loans to customers under government guaranteed programs that generally provide for guarantees of 50% to 90% of each loan, subject to a maximum guaranteed amount. The Company can sell the guaranteed portion of the loan in an active secondary market and retains the unguaranteed portion in its portfolio.

All sales of government guaranteed loans are executed on a servicing retained basis, and the Company retains the rights and obligations to service the loans. The standard sale structure provides for the Company to retain a portion of the cash flow from the interest payment received on the loan. When a loan sale involves the transfer of an interest less than the entire loan, the controlling accounting method under Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 860, Transfers and Servicing, requires the seller to reallocate the carrying basis between the assets transferred and the assets retained based on the relative fair value of the respective assets as of the date of sale. The maximum gain on sale that can be recognized is the difference between the fair value of the assets sold and the reallocated basis of the assets sold. The gain on sale recognized in income is the sum of the cash premium on the guaranteed loan, the fair value of the servicing assets recognized, less the discount recorded on the unguaranteed portion retained.

Gain on Sale of Mortgage Loans Held for Sale

Mortgage loans held for sale are sold with servicing released. Gains and losses on sales of mortgage loans held for sale are based on the difference between the selling price and the carrying value of the related loan sold

Securities Sold Under Agreements to Repurchase

Securities sold under agreements to repurchase represent the purchase of interests in securities by the Company’s customers. Securities sold under agreements to repurchase are stated at the amount of cash received in connection with the transaction. The Company does not account for any of its repurchase agreements as sales for accounting purposes in its financial statements. Repurchase agreements are settled on the following business day. All securities sold under agreements to repurchase are collateralized by pledged securities. The securities underlying the repurchase agreements are held in safekeeping by the Bank’s safekeeping agent.

Securities Held-to-Maturity

Securities classified as held-to-maturity are carried at cost, adjusted for the amortization of premiums and the accretion of discounts. The Company has the positive intent, and the ability, to hold these assets until their respective maturities.

Goodwill

The Company evaluates goodwill for impairment on an annual basis or on an interim basis if an event occurs or circumstances change that would more likely than not reduce the fair value below its carrying amount, in accordance with ASC 350-20. During the three months ended March 31, 2019, the Company changed its annual goodwill impairment testing date from December 31 to October 31. The Company believes that the new date is preferable as it provides additional time prior to the Company’s fiscal year end to complete the annual goodwill impairment test, especially in the event the Company pursues potential future acquisitions and experiences growth. This change does not accelerate, delay, avoid or cause an impairment charge, nor does this change result in adjustments to the Company’s previously issued financial statements. There were no impairments of goodwill recorded during the three months ended March 31, 2019 and 2018.

Liability-Classified Awards

The fair value of a liability award is determined on a quarterly basis beginning at the grant date until final vesting. Changes in the fair value of liability awards are recorded over the vesting period of the award. Changes in the fair value of liability awards that occur during the requisite service period are recognized as compensation cost over that period. The percentage of the fair value that is accrued as compensation cost at the end of each period equals the percentage of the requisite service that has been rendered at that date. Changes in the fair value of a liability award that occur after the end of the requisite service period are recognized as compensation cost in the period in which the changes occur. Any difference between the amount for which a liability award is settled and its fair value at the settlement date is an adjustment of compensation cost in the period of settlement. Compensation cost for liability awards is recorded in salaries and employee benefits and the associated liability is recorded in accounts payable and accrued expenses.

Adoption of New Accounting Standards

FASB Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) (“ASU 2016-02”) requires that lessees and lessors recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-11, “Targeted Improvements.” The new standard was adopted by the Company on January 1, 2019. ASU 2016-02 provides for a modified retrospective transition approach requiring lessees to recognize and measure leases on the balance sheet at the beginning of either the earliest period presented or as of the beginning of the period of adoption. The Company elected to apply ASU 2016-02 as of the beginning of the period of adoption (January 1, 2019) and will not restate comparative periods. The Company has no material leasing arrangements for which it is the lessor of property or equipment. The Company has made an accounting policy election not to apply the recognition requirements in the new standard to short-term leases. The Company has elected to apply the package of practical expedients as both the lessor and lessee allowed by the new standard under which the Company need not reassess whether any expired or existing contracts are or contain leases, the Company need not reassess the lease classification for any expired or existing lease, and the Company need not reassess initial direct costs for any existing leases. The Company has also elected to use the practical expedient to make an accounting policy election for leases of certain underlying assets to include both lease and nonlease components as a single component and account for that single component as a lease.

The Company’s operating leases relate primarily to office space and bank branches. Right-of-use (“ROU”) assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents the Company’s incremental borrowing rate at the lease commencement date. ROU assets are further adjusted for lease incentives, deferred rent and prepaid rent. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded in occupancy and equipment expense in the consolidated statements of income. As a result of implementing ASU 2016-02, the Company recognized an operating lease ROU asset of $18,705 and an operating lease liability of $18,753 on January 1, 2019, with no impact on our consolidated statement of income or consolidated statement of cash flows compared to the prior lease accounting model. The ROU asset and operating lease liability amounts recorded upon implementing ASU 2016-02 include the ROU asset and lease liability acquired/assumed from Green. Refer to Note 19 - Business Combinations for additional information. The ROU asset and operating lease liability are recorded in other assets and other liabilities, respectively, in the condensed consolidated balance sheets. See Note 9 - Leases for additional information.

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, with early adoption permitted on January 1, 2019. The Company expects ASU 2016-13 to have a significant impact on the Company’s accounting policies, internal control over financial reporting and footnote disclosures. The Company has assessed its system needs, has begun designing its financial models to estimate expected credit losses in accordance with the standard and continues to assess its data including the data acquired in connection with the acquisition of Green. Further development, testing and evaluation of those models is required to determine the impact that adoption of this standard will have on the financial condition and results of operations of the Company.

Supplemental Statement of Cash Flows

3 Months Ended

Mar. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental Statement of Cash Flows

Other supplemental cash flow information is presented below:



	Three Months Ended March 31,
	2019			2018
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	14,975		$	4,928
Supplemental Disclosures of Non-Cash Flow Information:
Setup of ROU asset and lease liability upon adoption of ASC 842	$	9,380		$	—
Reclassification of lease intangibles, cease-use liability and deferred rent liability to ROU asset upon adoption of ASC 842	(48		)	—
Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital	788			—
Non-cash assets
Investment securities	$	661,032		$	—
Non-marketable equity securities	40,287			—
Loans held for sale	9,360			—
Loans held for investment	3,245,492			(4,622		)
Accrued interest receivable	11,673			—
Bank owned life insurance	56,841			—
Bank premises, furniture and equipment	39,426			1,162
Investment in unconsolidated subsidiaries	666			—
Intangible assets, net	65,718			(956		)
Goodwill	206,821			2,233
Other assets	12,245			1,934
Right of use asset	9,373			—
Deferred taxes	11,535			—
Current taxes	1,799			—
Assets held for sale	85,307			—
Total assets	$	4,457,575		$	(249	)
Non-cash liabilities assumed
Non-interest-bearing deposits	$	825,364		$	(303	)
Interest-bearing deposits	1,300,825			—
Certificates and other time deposits	1,346,915			—
Accounts payable and accrued expenses	26,587			—
Lease liability	9,373			—
Accrued interest payable and other liabilities	5,181			54
Securities sold under agreements to repurchase	3,226			—
Advances from Federal Home Loan Bank	300,000			—
Subordinated debentures and subordinated notes	56,233			—
Liabilities held for sale	52,682			—
Total liabilities	$	3,926,386		$	(249	)

Share Transactions	3 Months Ended
Share Transactions	Mar. 31, 2019
Equity [Abstract]
Share Transactions	Share Transactions On January 28, 2019, the Company's Board of Directors authorized a stock buyback program (the "Stock Buyback Program") pursuant to which the Company may, from time to time, purchase up to $50,000 of its outstanding common stock. The shares may be repurchased in the open market or in privately negotiated transactions from time to time, depending upon market conditions and other factors, and in accordance with applicable regulations of the Securities and Exchange Commission (“SEC”). The Stock Buyback Program expires on December 31, 2019 and does not obligate the Company to purchase any shares. The Stock Buyback Program may be terminated or amended by the Company’s Board of Directors at any time prior to its expiration. During the first quarter of 2019, 316,600 shares were repurchased and held as treasury stock at an average price of $24.42.

Investment Securities

3 Months Ended

Mar. 31, 2019

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:



	March 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale
Corporate bonds	$	42,269	$	352	$	245	$	42,376
Municipal securities	75,134		1,380		110		76,404
Mortgage-backed securities	325,707		4,352		880		329,179
Collateralized mortgage obligations	380,996		2,682		790		382,888
Small Business Administration ("SBA") guaranteed securities	91,362		2,159		40		93,481
	$	915,468	$	10,925	$	2,065	$	924,328

Held-to-maturity
Mortgage-backed securities	$	5,442	$	130	$	—	$	5,572
Municipal securities	20,901		512		—		21,413
	$	26,343	$	642	$	—	$	26,985

The Company reassessed the classification of certain investments and effective January 1, 2019, the Company transferred $4,758 of municipal securities and $3,045 of mortgage-backed securities from available-for-sale to held-to-maturity at fair value. The related unrealized gain was nominal. No gain or loss was recorded at the time of the transfer.



	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale
U.S. government agencies	$	9,096	$	—	$	118	$	8,978
Corporate bonds	26,518		84		134		26,468
Municipal securities	40,275		10		338		39,947
Mortgage-backed securities	97,117		101		2,167		95,051
Collateralized mortgage obligations	92,906		197		1,344		91,759
Asset-backed securities	492		—		—		492
	$	266,404	$	392	$	4,101	$	262,695

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:



	March 31, 2019
	Less Than 12 Months				12 Months or More				Totals
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available-for-sale
Corporate bonds	$	8,597	$	91	$	3,660	$	154	$	12,257	$	245
Municipal securities	—		—		10,448		110		10,448		110
Mortgage-backed securities	95		1		52,554		879		52,649		880
Collateralized mortgage obligations	43,820		260		31,794		530		75,614		790
SBA guaranteed securities	—		—		7,279		40		7,279		40
	$	52,512	$	352	$	105,735	$	1,713	$	158,247	$	2,065



	December 31, 2018
	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	$	5,671	$	68	$	3,306	$	50	$	8,977	$	118
Municipal securities	16,043		92		10,428		246		26,471		338
Corporate bonds	6,689		134		—		—		6,689		134
Mortgage-backed securities	24,277		279		59,637		1,888		83,914		2,167
Collateralized mortgage obligations	18,765		71		42,536		1,273		61,301		1,344
	$	71,445	$	644	$	115,907	$	3,457	$	187,352	$	4,101

The number of investment positions in an unrealized loss position totaled 83 and 142 at March 31, 2019 and December 31, 2018, 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) the Company 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 March 31, 2019 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.



	March 31, 2019
	Available-for-sale				Held-to-Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	—	$	—	$	—	$	—
Due from one year to five years	7,997		8,115		—		—
Due from five years to ten years	52,733		52,720		730		734
Due after ten years	56,673		57,945		20,171		20,679
	117,403		118,780		20,901		21,413
Mortgage-backed securities and collateralized mortgage obligations	706,703		712,067		5,442		5,572
SBA guaranteed securities	91,362		93,481		—		—
	$	915,468	$	924,328	$	26,343	$	26,985



	December 31, 2018
	Available-for-sale
	Amortized Cost		Fair Value
Due in one year or less	$	2,963	$	2,966
Due from one year to five years	34,933		34,854
Due from five years to ten years	19,682		19,468
Due after ten years	18,311		18,105
	75,889		75,393
Mortgage-backed securities and collateralized mortgage obligations	190,023		186,810
Asset-backed securities	492		492
	$	266,404	$	262,695

Proceeds from sales of investment securities available-for-sale and gross gains and losses for the three months ended March 31, 2019 and 2018 were as follows:



	Three Months Ended March 31,
	2019		2018
Proceeds from sales	$	108,865	$	30,149
Gross realized gains	1		323
Gross realized losses	773		315

There was a blanket floating lien on all securities held by the Company to secure Federal Home Loan Bank advances as of March 31, 2019 and December 31, 2018.

Loans and Allowance for Loan Losses

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Loans and Allowance for Loan Losses

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



	March 31, 2019			December 31, 2018
Loans held for investment:
Real estate:
Construction and land	$	514,709		$	324,863
Farmland	10,028			10,528
1 - 4 family residential	570,599			297,917
Multi-family residential	287,713			51,285
Commercial real estate	2,446,557			1,103,032
Commercial	1,812,670			760,772
Mortgage warehouse	114,158			—
Consumer	21,766			7,112
	5,778,200			2,555,509
Deferred loan fees	(321		)	(15		)
Allowance for loan losses	(21,603		)	(19,255		)
	$	5,756,276		$	2,536,239

Included in the net loan portfolio as of March 31, 2019 and December 31, 2018 was an accretable discount related to purchased performing and purchased credit impaired (“PCI”) loans acquired within a business combination in the approximate amounts of $63,105 and $22,309, 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 March 31, 2019 and December 31, 2018 is a discount on retained loans from sale of originated SBA loans of $2,817 and $2,398, 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 March 31, 2019 and December 31, 2018.

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 March 31, 2019 and December 31, 2018, are as follows:



	Non-Accrual Loans
	March 31, 2019		December 31, 2018
Real estate:
Construction and land	$	2,399	$	2,399
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial real estate	4,874		2,575
Commercial	11,410		19,769
Mortgage warehouse	—		—
Consumer	—		2
	$	18,683	$	24,745

At March 31, 2019 and December 31, 2018, non-accrual loans included PCI loans of $7,903 and $16,902, respectively, 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.

During the three months ended March 31, 2019, interest income not recognized on non-accrual loans, excluding PCI loans, was $151. During the three months ended March 31, 2018, interest income not recognized on non-accrual loans was minimal.

An age analysis of past due loans, aggregated by class of loans, as of March 31, 2019 and December 31, 2018 is as follows:



	March 31, 2019
	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
Real estate:
Construction and land	$	8,789	$	782	$	3,586	$	13,157	$	496,400	$	5,152	$	514,709	$	1,187
Farmland	—		—		—		—		10,028		—		10,028		—
1 - 4 family residential	4,583		386		330		5,299		557,744		7,556		570,599		330
Multi-family residential	—		—		—		—		287,713		—		287,713		—
Commercial real estate	2,435		4,284		5,379		12,098		2,333,414		101,045		2,446,557		505
Commercial	3,109		1,609		4,685		9,403		1,751,828		51,439		1,812,670		2,281
Mortgage warehouse	—		—		—		—		114,158		—		114,158		—
Consumer	302		7		—		309		21,302		155		21,766		—
	$	19,218	$	7,068	$	13,980	$	40,266	$	5,572,587	$	165,347	$	5,778,200	$	4,303



	December 31, 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	$	305	$	—	$	—	$	305	$	324,558	$	—	$	324,863	$	—
Farmland	—		—		—		—		10,528		—		10,528		—
1 - 4 family residential	131		266		—		397		297,435		85		297,917		—
Multi-family residential	—		—		—		—		51,285		—		51,285		—
Commercial real estate	3,465		—		—		3,465		1,082,559		17,008		1,103,032		—
Commercial	816		828		—		1,644		735,391		23,737		760,772		—
Consumer	10		—		—		10		7,102		—		7,112		—
	$	4,727	$	1,094	$	—	$	5,821	$	2,508,858	$	40,830	$	2,555,509	$	—

⁽¹⁾ Loans 90 days past due and still accruing excludes $527 of PCI loans as of December 31, 2018.

Loans past due 90 days and still accruing increased to $4,303 as of March 31, 2019. These loans are also considered well-secured, and 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 March 31, 2019 and December 31, 2018 are summarized in the following tables.



	March 31, 2019⁽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	$	2,399	$	688	$	1,711	$	2,399	$	166	$	2,529
Farmland	—		—		—		—		—		—
1 - 4 family residential	158		158		—		158		—		159
Multi-family residential	—		—		—		—		—		—
Commercial real estate	5,235		3,099		2,136		5,235		104		5,591
Commercial	3,834		541		3,293		3,834		1,212		4,684
Consumer	63		63		—		63		—		67
Total	$	11,689	$	4,549	$	7,140	$	11,689	$	1,482	$	13,030

⁽¹⁾Loans reported exclude PCI loans.



	December 31, 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	$	2,016	$	2,016	$	—	$	2,016	$	—	$	2,262
Farmland	—		—		—		—		—		—
1 - 4 family residential	542		542		—		542		—		565
Multi-family residential	—		—		—		—		—		—
Commercial real estate	2,939		2,939		—		2,939		—		3,032
Commercial	3,228		644		2,584		3,228		368		3,351
Consumer	66		66		—		66		—		79
Total	$	8,791	$	6,207	$	2,584	$	8,791	$	368	$	9,289

⁽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 $1,159 and $1,171 as of March 31, 2019 and December 31, 2018, respectively.

There were no new TDRs during the three months ended March 31, 2019 and 2018.

There were no loans modified as TDR loans within the previous 12 months and for which there was a payment default during the three months ended March 31, 2019 and 2018. 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 months ended March 31, 2019 and 2018 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 March 31, 2019 or December 31, 2018.

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 March 31, 2019 and December 31, 2018:



	March 31, 2019
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	499,407	$	6,810	$	3,340	$	—	$	5,152	$	514,709
Farmland	10,028		—		—		—		—		10,028
1 - 4 family residential	562,306		386		351		—		7,556		570,599
Multi-family residential	287,713		—		—		—		—		287,713
Commercial real estate	2,305,261		8,237		32,014		—		101,045		2,446,557
Commercial	1,735,925		17,484		7,822		—		51,439		1,812,670
Mortgage warehouse	114,158		—		—		—		—		114,158
Consumer	21,465		—		146		—		155		21,766
Total	$	5,536,263	$	32,917	$	43,673	$	—	$	165,347	$	5,778,200



	December 31, 2018
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	320,987	$	1,860	$	2,016	$	—	$	—	$	324,863
Farmland	10,528		—		—		—		—		10,528
1 - 4 family residential	296,870		236		726		—		85		297,917
Multi-family residential	51,285		—		—		—		—		51,285
Commercial real estate	1,065,982		7,056		12,986		—		17,008		1,103,032
Commercial	720,583		8,900		7,552		—		23,737		760,772
Consumer	6,950		—		162		—		—		7,112
Total	$	2,473,185	$	18,052	$	23,442	$	—	$	40,830	$	2,555,509

An analysis of the allowance for loan losses for the three months ended March 31, 2019 and 2018 and year ended December 31, 2018 is as follows:



	Three Months Ended March 31, 2019			Year Ended December 31, 2018			Three Months Ended March 31, 2018
Balance at beginning of period	$	19,255		$	12,808		$	12,808
Provision charged to earnings	5,012			6,603			678
Charge-offs	(2,728		)	(197		)	(94		)
Recoveries	64			41			9
Net charge-offs	(2,664		)	(156		)	(85		)
Balance at end of period	$	21,603		$	19,255		$	13,401

The allowance for loan losses as a percentage of total loans was 0.37%, 0.75% and 0.58% as of March 31, 2019, December 31, 2018 and March 31, 2018, respectively.

The following tables summarize the activity in the allowance for loan losses by portfolio segment for the periods indicated.



	Three Months Ended March 31, 2019
	Real Estate
	Construction, Land and Farmland		Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	2,244	$	1,975		$	6,463	$	8,554		$	19		$	19,255
Provision (recapture) charged to earnings	507		(85		)	750		3,785			55			5,012
Charge-offs	—		—			—		(2,654		)	(74		)	(2,728		)
Recoveries	—		8			—		10			46			64
Net charge-offs	—		8			—		(2,644		)	(28		)	(2,664		)
Balance at end of period	$	2,751	$	1,898		$	7,213	$	9,695		$	46		$	21,603
Period-end amount allocated to:
Specific reserves	166		—			104		1,212			—			1,482
PCI reserves	—		—			—		296			—			296
General reserves	2,585		1,898			7,109		8,187			46			19,825
Total	$	2,751	$	1,898		$	7,213	$	9,695		$	46		$	21,603



	For the Year Ended December 31, 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	929		502		2,053		3,100			19			6,603
Charge-offs	—		—		—		(175		)	(22		)	(197		)
Recoveries	—		—		—		41			—			41
Net charge-offs (recoveries)	—		—		—		(134		)	(22		)	(156		)
Balance at end of period	$	2,244	$	1,975	$	6,463	$	8,554		$	19		$	19,255
Period-end amount allocated to:
Specific reserves	—		—		—		368			—			368
PCI reserves	—		—		—		1,302			—			1,302
General reserves	2,244		1,975		6,463		6,884			19			17,585
Total	$	2,244	$	1,975	$	6,463	$	8,554		$	19		$	19,255



	For the Three Months Ended March 31, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial			Consumer		Total
Balance at beginning of year	$	1,315	$	1,473	$	4,410	$	5,588		$	22	$	12,808
Provision (recapture) charged to earnings	111		117		552		(102		)	—		678
Charge-offs	—		—		—		(94		)	—		(94		)
Recoveries	—		—		—		9			—		9
Net charge-offs (recoveries)	—		—		—		(85		)	—		(85		)
Balance at end of period	$	1,426	$	1,590	$	4,962	$	5,401		$	22	$	13,401
Period-end amount allocated to:
Specific reserves	—		—		—		66			—		66
PCI reserves	—		—		—		—			—		—
General reserves	1,426		1,590		4,962		5,335			22		13,335
Total	$	1,426	$	1,590	$	4,962	$	5,401		$	22	$	13,401

The Company’s recorded investment in loans as of March 31, 2019 and December 31, 2018 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows:



	March 31, 2019
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,399	$	158	$	5,235	$	3,834	$	63	$	11,689
Loans collectively evaluated for impairment	517,186		850,598		2,340,277		1,871,555		21,548		5,601,164
PCI loans	5,152		7,556		101,045		51,439		155		165,347
Total	$	524,737	$	858,312	$	2,446,557	$	1,926,828	$	21,766	$	5,778,200



	December 31, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,016	$	542	$	2,939	$	3,228	$	66	$	8,791
Loans collectively evaluated for impairment	333,375		348,575		1,083,085		733,807		7,046		2,505,888
PCI loans	—		85		17,008		23,737		—		40,830
Total	$	335,391	$	349,202	$	1,103,032	$	760,772	$	7,112	$	2,555,509

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 March 31, 2019 and December 31, 2018 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.



	March 31, 2019		December 31, 2018
Carrying amount	$	165,051	$	39,528
Outstanding balance	220,864		49,902

Changes in the accretable yield for PCI loans for the three months ended March 31, 2019 and 2018 are included in table below.



	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018
Balance at beginning of period	$	18,747		$	2,723
Additions	18,073			1,414
Reclassifications (to) from nonaccretable	(413		)	5,870
Accretion	(2,545		)	(1,868		)
Balance at end of period	$	33,862		$	8,139

During the three months ended March 31, 2019, the Company received cash collections in excess of expected cash flows on PCI loans of $390. There were no cash collections in excess of expected cash flows on PCI loans for the three months ended March 31, 2018.

Servicing Assets

The Company was servicing loans of approximately $228,638 and $74,946 as of March 31, 2019 and 2018, respectively. A summary of the changes in the related servicing assets are as follows:



	Three Months Ended March 31,
	2019			2018
Balance at beginning of period	$	1,304		$	1,215
Servicing asset acquired through acquisition	2,382			—
Increase from loan sales	461			92
Amortization charged to income	(175		)	(102		)
Balance at end of period	$	3,972		$	1,205

The estimated fair value of the servicing assets approximated the carrying amount at March 31, 2019, December 31, 2018 and March 31, 2018. 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 March 31, 2019 and 2018, 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 March 31, 2019 and December 31, 2018.

- 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

Fair Value

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value

The following table summarizes assets measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:



	March 31, 2019
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Financial Assets:
Available-for-sale securities	$	—	$	924,328	$	—	$	924,328
Loans held for sale⁽¹⁾	—		7,259		—		7,259
Correspondent interest rate swaps	—		767		—		767
Customer interest rate swaps	—		2,453		—		2,453
Correspondent interest rate caps and collars	—		110		—		110
Financial Liabilities:
Correspondent interest rate swaps	—		2,715		—		2,715
Customer interest rate swaps	—		764		—		764
Customer interest rate caps and collars	—		110		—		110

⁽¹⁾ Represents loans held for sale elected to be carried at fair value upon origination or acquisition.



	December 31, 2018
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Financial Assets:
Available-for-sale securities	$	—	$	262,695	$	—	$	262,695

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

There were no transfers between Level 2 and Level 3 during the three months ended March 31, 2019 and 2018.

The following table summarizes assets measured at fair value on a non-recurring basis as of March 31, 2019 and December 31, 2018, 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 March 31, 2019
Assets:
Impaired loans	$	—	$	—	$	7,140	$	7,140
Other real estate owned	—		—		151		151
As of December 31, 2018
Assets:
Impaired loans	—		—		2,584		2,584

At March 31, 2019, impaired loans had a carrying value of $7,140, with $1,482 specific allowance for loan loss allocated. At December 31, 2018, impaired loans had a carrying value of $2,584, with $368 specific allowance for loan loss allocated.

Other real estate owned consisted of one property recorded with a fair value of approximately $151 at March 31, 2019. There were no real estate owned properties recorded at fair value at December 31, 2018.

There were no liabilities measured at fair value on a non-recurring basis as of March 31, 2019 or December 31, 2018.

Fair Value of Financial Instruments

The Company’s methods of determining fair value of financial instruments in this Note are consistent with its methodologies disclosed in the Company’s 2018 Annual Report on Form 10-K, with the exception of securities sold under agreements to repurchase. Please refer to Note 16 of the Company’s 2018 Annual Report on Form 10-K for information on these methods.

Securities sold under agreements to repurchase: The carrying amount of securities sold under agreements to repurchase is a reasonable estimate of fair value because these borrowings reprice at market rates generally daily.

The estimated fair values and carrying values of all financial instruments under current authoritative guidance as of March 31, 2019 and December 31, 2018 were as follows:



			Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
March 31, 2019
Financial assets:
Cash and cash equivalents	$	339,473	$	—	$	339,473	$	—
Held-to-maturity investments	26,343		—		26,985		—
Loans held for sale	8,003		—		8,003		—
Loans held for investment, mortgage warehouse	114,158		—		—		114,306
Loans held for investment	5,663,721		—		—		5,741,733
Accrued interest receivable	23,234		—		23,234		—
Bank-owned life insurance	79,397		—		79,397		—
Servicing asset	3,972		—		3,972		—
Other investments	75,920		—		75,920		—
Financial instruments assets held for sale	77,503		—		77,503		—
Financial liabilities:
Deposits	$	6,297,715			$	6,065,598	$	—
Advances from FHLB	252,982		—		255,753		—
Accrued interest payable	8,008		—		8,008		—
Subordinated debentures and subordinated notes	72,719		—		72,719		—
Securities sold under agreement to repurchase	2,778		—		2,778		—
Financial instruments liabilities held for sale	62,381		—		62,381		—
December 31, 2018
Financial assets:
Cash and cash equivalents	$	84,449	$	—	$	84,449	$	—
Loans held for sale	1,258		—		1,258		—
Loans held for investment	2,555,494		—		—		2,553,376
Accrued interest receivable	8,828		—		8,828		—
Bank-owned life insurance	22,064		—		22,064		—
Servicing asset	834		—		834		—
Other investments	22,822		—		22,822		—
Financial liabilities:
Deposits	$	2,622,428	$	—	$	2,506,379	$	—
Advances from FHLB	28,019		—		28,063		—
Accrued interest payable	1,135		—		1,135		—
Subordinated debentures and subordinated notes	16,691		—		16,691		—

- 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

Derivative Financial Instruments

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

In order to accommodate the borrowing needs of certain commercial customers, the Company has entered into interest rate swap or cap agreements with those customers. These interest rate derivative contracts effectively allow our customers to convert a variable rate loan into a fixed rate loan. In order to offset the exposure and manage interest rate risk, at the time an agreement was entered into with a customer, the Company entered into an interest rate swap or cap with a correspondent bank counterparty with offsetting terms. These derivative instruments are not designated as accounting hedges and changes in the net fair value are recognized in noninterest income or expense. Because the Company acts as an intermediary for its customers, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on the Company’s results of operations. The fair value amounts are included in other assets and other liabilities.

The following is a summary of the interest rate swaps outstanding as of March 31, 2019. We did not have interest rate swaps as of December 31, 2018.



	March 31, 2019
	Notional Amount		Fixed Rate	Floating Rate	Maturity	Fair Value
Non-hedging derivative instruments:
Customer interest rate derivatives:
Interest rate swaps - receive fixed/pay floating	$	174,946	2.94 - 8.47%	LIBOR 1 month + 0% - 5.00%	Wtd. Avg. 3.6 years	$	(1,948	)
Interest rate caps and collars	$	37,629	2.50 - 5.80%	LIBOR 1 month + 0% - 3.75%	Wtd. Avg. 1.5 years	$	110

Correspondent interest rate derivatives:
Interest rate swaps - pay fixed/receive floating	$	174,946	2.94 - 8.47%	LIBOR 1 month + 0% - 5.00%	Wtd. Avg. 3.6 years	$	1,689
Interest rate caps and collars	$	37,629	2.50 - 5.80%	LIBOR 1 month + 0% - 3.75%	Wtd. Avg. 1.5 years	$	(110	)

The estimated fair values of non-hedging derivative instruments are reflected within the Company’s consolidated balance sheet (included in other assets and other liabilities). The notional amounts and estimated fair values of the non-hedging derivative instruments by classification as of March 31, 2019. The Company did not have non-hedging derivative instruments as of December 31, 2018.



	March 31, 2019
			Estimated Fair Value
	Notional Amount		Asset Derivative			Liability Derivative
Non-hedging interest rate derivatives:
Financial institution counterparty:
Interest rate swaps	$	174,946	$	767		$	2,715
Interest rate caps and collars	37,629		110			—
Commercial customer counterparty:
Interest rate swaps	174,946		2,453			764
Interest rate caps and collars	37,629		—			110
Gross derivatives			$	3,330		$	3,589
Offsetting derivative assets/liabilities			(235		)	(235		)
Net derivatives in the consolidated balance sheets			$	3,095		$	3,354

Financial Instruments with Off-Balance Sheet Risk

3 Months Ended

Mar. 31, 2019

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 a 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 March 31, 2019 and December 31, 2018:



	March 31,		December 31,
	2019		2018
Commitments to extend credit	$	1,693,207	$	962,436
Standby and commercial letters of credit	30,788		5,431
Total	$	1,723,995	$	967,867

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.

Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

Operating leases in which the Company is the lessee are recorded as operating lease ROU assets and operating lease liabilities, included in other assets and accounts payable and accrued expenses, respectively, on the Company’s condensed consolidated balance sheets. The Company does not currently have finance leases in which it is the lessee.

Operating lease ROU assets represent the Company’s right to use an underlying asset during the lease term and operating liabilities represent its obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents the Company’s incremental borrowing rate at the lease commencement date. ROU assets are further adjusted for lease incentives. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded in net occupancy expense in the condensed consolidated statements of income and other comprehensive income.

The Company’s leases related primarily to office space and bank branches with remaining lease terms of generally 1 to 8 years. Certain lease arrangements contain extension options which typically range from 5 to 10 years at the then fair market rental rates. As these extension options are not generally considered reasonably certain of exercise, they are not included in the lease term. As of March 31, 2019, operating lease ROU assets and liabilities were $17,231 and $17,729, respectively.

The table below summarizes the Company’s net lease cost:



	Three Months Ended March 31, 2019
Operating lease cost	$	1,384
Variable lease cost	263
Net lease cost	$	1,647

The table below summarized other information related to our operating leases:



	Three Months Ended March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,146
Weighted average remaining lease term - operating leases, in years	3.2
Weighted average discount rate - operating leases	1.5		%

A maturity analysis of operating lease liabilities and reconciliation of the undiscounted cash flows to the total operating lease liability is as follows:



	March 31, 2019
Lease payments due:
Within one year	$	4,485
After one but within two years	3,832
After two but within three years	2,930
After three but within four years	2,536
After four but within five years	2,110
After five years	3,345
Total undiscounted cash flows	19,238
Less: Discount on cash flows	(1,509		)
Total lease liability	$	17,729

There were no sale and leaseback transactions, leveraged leases, or lease transactions with related parties during the three months ended March 31, 2019. As of March 31, 2019, the Company does not have additional operating leases for office space that are anticipated to commence during the second quarter of 2019.

Intangible Assets and Goodwill

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

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



	As of March 31, 2019
	Weighted	Gross					Net
	Amortization	Intangible		Accumulated			Intangible
	Period	Assets		Amortization			Assets
Core deposit intangibles	7.7 years	$	81,769	$	6,853		$	74,916
Servicing asset	6.8 years	4,934		962			3,972
Intangible lease assets	2.4 years	4,765		2,408		—	2,357
		$	91,468	$	10,223		$	81,245



	As of December 31, 2018
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Assets		Amortization		Assets
Core deposit intangibles	7.7 years	$	16,051	$	4,376	$	11,675
Servicing asset	6.8 years	2,091		787		1,304
Intangible lease assets	2.7 years	5,282		2,365		2,917
		$	23,424	$	7,528	$	15,896

For the three months ended March 31, 2019 and March 31, 2018, amortization expense related to intangible assets of approximately $2,695 and $1,205, respectively, was included within amortization of intangibles, occupancy and equipment, and other income within the condensed consolidated statements of income.

Changes in the carrying amount of goodwill are summarized as follows for the three months ended March 31, 2019:



	March 31, 2019
Balance as of December 31, 2018	$	161,447
Effect of Green acquisition	206,821
Balance as of March 31, 2019	$	368,268

Deposits

3 Months Ended

Mar. 31, 2019

Banking and Thrift [Abstract]

Deposits

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



	March 31, 2019		December 31, 2018
Noninterest-bearing demand accounts	$	1,439,630	$	626,283
Interest-bearing demand accounts	334,867		146,969
Savings accounts	113,253		33,147
Limited access money market accounts	2,169,049		1,133,045
Certificates of deposit, greater than $100	1,434,992		392,935
Certificates of deposit, less than $100	805,924		290,049
Total	$	6,297,715	$	2,622,428

As of March 31, 2019, the scheduled maturities of certificates of deposit were as follows:



Year	Amount
2019	$	1,852,426
2020	193,475
2021	100,403
2022	53,072
2023	41,592
Total	$	2,240,968

The aggregate amount of demand deposit overdrafts that have been reclassified as loans were $304 and $153 as of March 31, 2019 and December 31, 2018, respectively. Brokered deposits at March 31, 2019 and December 31, 2018 totaled approximately $621,966 and $234,190, respectively.

Advances from the Federal Home Loan Bank ("FHLB")

3 Months Ended

Mar. 31, 2019

Banking and Thrift [Abstract]

Advances from the Federal Home Loan Bank (FHLB)

Advances from the Federal Home Loan Bank (“FHLB”)

Advances from the FHLB totaled $252,982 and $28,019 at March 31, 2019 and December 31, 2018, respectively. As of March 31, 2019, the advances were collateralized by a blanket floating lien on certain securities and loans, had a weighted average rate of 2.62% and mature on various dates in 2019 and 2022. The Company had the availability to borrow additional funds of approximately $1,057,155 as of March 31, 2019.

Contractual maturities of FHLB advances at March 31, 2019 were as follows:



2019	$	225,000
2020	25,000
2022	2,982
Total	$	252,982

Subordinated Debentures and Subordinated Notes

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Subordinated Debentures and Subordinated Notes

Subordinated Notes



	March 31, 2019		December 31, 2018
Subordinated notes	$	40,000	$	5,000
Unamortized debt premium (discount)	2,862		(11		)
Total subordinated notes	$	42,862	$	4,989

In connection with the Company’s acquisition of Green, the Company assumed $35,000 of 8.50% Fixed-to-Floating Rate Subordinated Notes (the “Notes”) that mature on December 15, 2026. The Notes, which qualify as Tier 2 capital under the Federal Reserve’s capital guidelines, have an interest rate of 8.50% per annum during the fixed-rate period from date of issuance through December 15, 2021. Interest is payable semi-annually on each June 15 and December 15 through December 15, 2021.

During the floating rate period from December 15, 2021, but excluding the maturity date or date of earlier redemption, the Notes will bear interest at a rate per annum equal to three-month LIBOR for the related interest period plus 6.685%, payable quarterly on each March 15, June 15, September 15 and December 15. The Notes are subordinated in right of payment to all of the Company's senior indebtedness and effectively subordinated to all existing and future debt and all other liabilities of the Bank. The Company may elect to redeem the Notes (subject to regulatory approval), in whole or in part, on any early redemption date which is any interest payment date on or after December 15, 2021 at a redemption price equal to 100% of the principal amount plus any accrued and unpaid interest. Other than on an early redemption date, the Notes cannot be accelerated except in the event of bankruptcy or the occurrence of certain other events of bankruptcy, insolvency or reorganization.

Subordinated Debentures Trust Preferred Securities



	March 31, 2019			December 31, 2018
Subordinated debentures	$	33,868		$	11,702
Debt discount	(4,011		)	—
Total subordinated debentures	$	29,857		$	11,702

In connection with the Company’s acquisition of Green, the Company assumed obligations related to the subordinated debentures issued to Patriot Bancshares Capital Trust I and Patriot Bancshares Capital Trust II. A summary of information related to these two issues of subordinated debentures is set forth in the table below:



Description	Subordinated Debt Owed to Trusts		Interest Rate⁽¹⁾	Maturity Date
Patriot Bancshares Capital Trust I	$	5,155	3 month LIBOR +1.85%, not to exceed 11.90%	April 7, 2036
Patriot Bancshares Capital Trust II	$	17,011	3 month LIBOR +1.80%, not to exceed 11.90%	September 15, 2037

⁽¹⁾ The 3-month LIBOR in effect as of March 31, 2019 was 2.6%.

Each of the trusts is a capital trust organized for the sole purpose of issuing trust securities and investing the proceeds in the Company’s junior subordinated debentures. The trust preferred securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common securities of each trust are owned by the Company. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related subordinated debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of payment to all of the Company’s present and future senior indebtedness. The Company has fully and unconditionally guaranteed each trust’s obligations under the trust securities issued by such trust to the extent not paid or made by each trust, provided such trust has funds available for such obligations. The trust preferred securities issued by each of the trusts as of March 31, 2019, may be redeemed at the Company’s option.

Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and common securities will also be deferred.

Stock-Based and Liability-Classified Awards

3 Months Ended

Mar. 31, 2019

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

Stock-Based and Liability-Classified Awards

Veritex 2010 Stock Option and Equity Incentive Plan (“2010 Incentive Plan”)

The closing of the Green acquisition on January 1, 2019 constituted a change-in-control under the 2010 Incentive Plan. As a result, all unvested awards as of December 31, 2018 were accelerated to fully vest on the close date in accordance with the 2010 Incentive Plan. Stock compensation expense related to the 2010 Incentive Plan recognized in the accompanying condensed consolidated statements of income totaled $2 and $5 for the three months ended March 31, 2019 and 2018, respectively.

A summary of option activity under the 2010 Incentive Plan for the three months ended March 31, 2019 and 2018, 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, 2018	305,000		$	10.16	3.59 years
Exercised	(9,000	)	10.38
Outstanding at March 31, 2018	296,000		$	10.16	3.31 years
Options exercisable at March 31, 2018	290,000		$	10.12	3.25 years

Outstanding at January 1, 2019	275,000		$	10.12	2.39 years	$	3,098
Exercised	(15,000	)	10.28
Outstanding and exercisable at March 31, 2019	260,000		$	10.12	2.11 years	$	3,723

As of March 31, 2019, there was no unrecognized stock compensation expense related to non-performance based stock options. As of December 31, 2018 and March 31, 2018, there was approximately $2 and $7, respectively, of unrecognized compensation expense related to non-performance based stock options.

No restricted stock units were granted or forfeited under the 2010 Incentive Plan during 2019 and no restricted stock units were outstanding as of March 31, 2019. A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of March 31, 2018, and changes during the three 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, 2018	24,250		$	13.19
Vested into shares	(8,750	)	10.85
Forfeited	(500	)	10.85
Outstanding at March 31, 2018	15,000		$	14.99

As of March 31, 2019 and December 31, 2018, there was no remaining unrecognized compensation expense related to non-vested restricted stock units. As of March 31, 2018, there was $12 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 March 31, 2019 and 2018 is presented below:

Veritex 2014 Omnibus Incentive Plan (“2014 Omnibus Plan”) and Green Acquired Omnibus Plans

Accelerated Vesting of 2014 Omnibus Plan Awards

In connection with the acquisition of Green, which closed on January 1, 2019, the Company approved the full acceleration of vesting of all unvested 2014 Omnibus Plan awards on the close date. The consummation of the acquisition constituted a change in control of the Company under the 2014 Omnibus Plan. Under its terms, accelerated vesting upon a change in control is permissible, and the Company’s board of directors (“Board”) approved that all unvested equity awards issued under the 2014 Omnibus Plan would fully vest as of the consummation of the acquisition on January 1, 2019. The Company accounted for the discretionary vesting of awards as a modification of the original awards. This modification resulted in the accelerated vesting of 133,455 non-performance based restricted stock units, 51,284 performance based restricted stock units and 320,405 non-performance based stock options on January 1, 2019, the modification date. The incremental compensation cost resulting from these modifications was nominal for the three months ended March 31, 2019. The accelerated vesting of awards on January 1, 2019 resulted in the immediate recognition of $5,535 of stock compensation expense for the three months ended March 31, 2019. This stock compensation expense is included in merger and acquisition expenses in the condensed consolidated statements of income.

Post-combination Expense of Green Awards

In connection with the acquisition of Green and pursuant to the terms of the related definitive agreement, all of Green’s outstanding and unvested equity awards prior to the close date, including stock options and restricted stock units, became fully vested as of the close date. The acceleration of vesting of Green’s restricted stock units according to the terms of the merger consisted of a modification of the original awards, with exception of certain awards that had original accelerated vesting terms. The accounting treatment for the outstanding Green awards in the context of the business combination was to allocate the fair market value of Green’s stock options and restricted stock units at the close date attributable to pre-combination service to the aggregate merger consideration. The difference between the fair market value of the replacement options as well as the fully vested restricted stock units and the amount allocable to pre-combination service was considered a post-combination expense to the Company after the close date. The estimated post combination expense to the Company as a result of the business combination was $10,129 which was immediately expensed in the post combination financial statements for the quarter ended March 31, 2019, as there were no further service conditions. This compensation expense is included in merger and acquisition expenses in the condensed consolidated statements of income.

2018 Performance Based Restricted Stock Units

The Company determined in January 2019 that 67% of the performance-based restricted stock units granted during the year ended December 31, 2018 or 12,704 units, should be forfeited in January 2019 based on the performance results of the Company’s total shareholder return (“TSR”) relative to the SNL Micro Cap US Bank Index for the performance period starting on December 31, 2017 and ending on December 31, 2018.

2019 Grants of Restricted Stock Units

In January 2019, the Company granted non-performance based and performance based restricted stock units under the 2014 Omnibus Plan and the Veritex (Green) 2014 Omnibus Equity Incentive Plan (“Veritex (Green) 2014 Plan”). The non-performance-based restricted stock units vest in three or five equal installments on each anniversary of the grant date. There were also non-performance based restricted stock units granted with no vesting conditions on the grant date.

The performance based restricted stock units granted in January 2019 cliff vest on January 1, 2022 with the performance period starting on December 31, 2018 and ending on December 31, 2021. The vesting percentage is determined based on the Company’s TSR relative to the TSR of 15 peer companies (“Peer Group”) over the performance period. Below is a table showing the range of vesting percentages for the performance based restricted stock units based on the Company’s TSR percentile rank.



	Vesting %
Below the 24.9^th percentile of Peer Group TSR	—%
Within the 25^th to 49.9^th percentile of Peer Group TSR	50%
Within the 50^th the 74.9^th percentile of Peer Group TSR	100%
At or above the 75^th percentile of Peer Group TSR	150%

Certain non-performance based and performance based restricted stock units granted under the 2014 Omnibus Plan in January 2019 have terms requiring cash settlement of the awards unless and until the awards are approved by the shareholders of the Company at the Company’s 2019 annual meeting of shareholders, at which meeting the Company has sought approval from its shareholders to authorize the amendment and restatement of the 2014 Omnibus Plan to increase the aggregate number of shares that are available for grant thereunder, among certain other terms, as well as approval of the 2019 equity awards so they may be settled in shares (the “Shareholder Approval”). The compensation committee of the Company’s Board approved the amendment and restatement of the 2014 Omnibus Plan in April 2019. Given the requirement to settle these awards in cash until Shareholder Approval is obtained, the Company accounted for these awards as liability-classified awards and measured them at fair value as of March 31, 2019.

A Monte Carlo simulation was used to estimate the fair value of performance-based restricted stock units on the grant date that include a market condition based on the Company’s TSR relative to its Peer Group, which determines the eligible number of restricted stock units to vest. A similar Monte Carlo valuation was also obtained for the liability performance based awards as of March 31, 2019.

2019 Grant of Stock Options and Tandem Stock Appreciation Rights

In January 2019, the Company granted non-performance options under the 2014 Omnibus Plan and Veritex (Green) 2014 Plan that vest in three equal installments on each anniversary of the grant date.

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 three months ended March 31, 2019 and 2018:



	Three Months Ended March 31,
	2019	2018
Dividend yield	0.00%	0.00%
Expected life	6.5 years	5.0 to 7.5 years
Expected volatility	29.67%	27.87% to 37.55%
Risk-free interest rate	2.56%	1.06% to 2.73%

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.

In addition, the Company granted non-performance based stock options and tandem stock appreciation rights (“SARs”) under the 2014 Omnibus Plan that vest in three or five equal installments on each anniversary of the grant date. The non-performance based stock options shall become exercisable upon receipt of both the affirmative vote of the Board and approval of the shareholders at the Company’s 2019 annual meeting of shareholders. SARs represent the right to receive a cash payment equal to the fair value of a share of the Company’s common stock of the Company upon the exercise of the award. As of March 31, 2019, the Company has accounted for the SARs as liability awards measured at fair value.

Stock Compensation Expense and Liability Award Compensation Expense

Stock compensation expense for the equity awards granted under the 2014 Omnibus Plan, excluding the accelerated stock compensation expense of $5,535 previously discussed above in this Note, was approximately $1,508 for the three months ended March 31, 2019 of which $1,418 related to non-performance based restricted stock units granted in January 2019 with no vesting conditions for which the stock compensation is included in merger and acquisition expenses in the condensed consolidated statements of income. For the three months ended March 31, 2018, the Company recognized $474 in stock compensation expense.

Stock compensation expense for options and restricted stock unit awards granted under the Veritex (Green) 2014 Plan was approximately $385 for the three months ended March 31, 2019, excluding the post-combination stock compensation expense of $10,129 associated with all of Green’s fully vested replacement awards discussed above in this Note.

Compensation expense for liability-classified awards under the 2014 Omnibus Plan was $708 for the three months ended March 31, 2019.

2014 Omnibus Plan

A summary of the status of the Company’s stock options under the 2014 Omnibus Plan as of March 31, 2019 and 2018, and changes during the three months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based Stock Options
	Equity Awards							Liability Awards
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value		Shares Underlying Options	Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2018	332,706		$	22.71	8.86 years			—	$	—
Granted	112,593		27.63					—	—
Exercised	(1,983	)	14.95					—	—
Outstanding at March 31, 2018	443,316		$	23.95	8.89 years			—	$	—
Options exercisable at March 31, 2018	104,396		$	17.21	7.56 years			—	$	—

Outstanding at January 1, 2019	449,520		$	24.47	8.24 years			—	$	—
Granted	75,928		21.38					253,633	21.38
Forfeited	(4,445	)	21.38					—	—
Exercised	(11,848	)	15.37					—	—
Outstanding at March 31, 2019	509,155		$	23.28	8.28 years	$	1,191	253,633	$	21.38	9.76 years	$	605
Options exercisable at March 31, 2019	437,672		$	24.71	8.04 years	$	860	—	$	—
Weighted average fair value of options granted during the period			$	7.59					$	21.38

As of March 31, 2019, December 31, 2018 and March 31, 2018 there was $497, $2,103 and $2,806 of total unrecognized compensation expense related to equity options awarded under the 2014 Omnibus Plan, respectively. As of March 31, 2019, there was $2,180 of total unrecognized compensation expense related to liability options awarded under the 2014 Omnibus Plan. The unrecognized compensation expense at March 31, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.75 years.

A summary of the status of the Company’s non-performance based restricted stock units under the 2014 Omnibus Plan as of March 31, 2019 and 2018, and changes during the three months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based
	Restricted Stock Units
	Equity Awards				Liability Awards
	Units		Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	150,722		$	13.29	—	$	—
Granted	34,500		28.05		—	—
Vested into shares	(8,399	)	25.13		—	—
Options exercisable at March 31, 2018	176,823		$	15.61	—	$	—

Outstanding at January 1, 2019	133,455		$	19.67	—	$	—
Granted	66,327		21.38		165,739	21.38
Vested into shares	(196,171	)	23.41		—	—
Outstanding at March 31, 2019	3,611		$	21.81	165,739	$	21.38

A summary of the status of the Company’s performance based restricted stock units under the 2014 Omnibus Plan as of March 31, 2019 and 2018, and changes during the three months then ended, is as follows:



	2014 Omnibus Plan
	Performance Based
	Restricted Stock Units
	Equity Awards				Liability Awards
	Units		Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	53,594		$	8.72	—	$	—
Granted	40,269		27.59		—	—
Vested into shares	(26,623	)	18.83		—	—
Outstanding at March 31, 2018	67,240		$	16.01	—	$	—

Outstanding at January 1, 2019	63,988		$	21.28	—	$	—
Granted	29,282		21.38		32,249	21.38
Vested into shares	(51,284	)	25.31		—	—
Forfeited	(14,418	)	26.85		—	—
Outstanding at March 31, 2019	27,568		$	23.11	32,249	$	21.38

As of March 31, 2019, December 31, 2018 and March 31, 2018 there was $498, $3,430 and $5,097 of total unrecognized compensation related to equity restricted stock units awarded under the 2014 Omnibus Plan, respectively. As of March 31, 2019, there was $4,106 of unrecognized compensation related to liability restricted stock units awarded under the 2014 Omnibus Plan. The unrecognized compensation expense at March 31, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.75 years.

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 March 31, 2019 and 2018 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of March 31,
	2019	2018
Non-performance based stock options exercised	315	54
Non-performance based restricted stock units vested	1,096	745
Performance based restricted stock units vested	4,346	234

Veritex (Green) 2014 Plan

A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of March 31, 2019, and changes during the three months then ended, is as follows:



	Veritex (Green) 2014 Plan
	Non-performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2019	—		$	—
Converted in acquisition of Green	304,778		15.41
Granted	211,793		21.38
Exercised	(28,033	)	12.89			—
Outstanding at March 31, 2019	488,538		$	23.28	8.35 years	$	2,977
Options exercisable at March 31, 2019	276,745		$	15.67	7.27 years	$	2,376
Weighted average fair value of options granted during the period			$	24.22

As of March 31, 2019, there was $1,474 of total unrecognized compensation expense related to options awarded under the Veritex (Green) 2014 Plan. The unrecognized compensation expense at March 31, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.75 years.

A summary of the status of the Company’s non-performance based restricted stock units under the Veritex (Green) 2014 Plan as of March 31, 2019 and changes during the three months then ended, is as follows:



	Veritex (Green) 2014 Plan
	Non-performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	116,250	21.38
Outstanding at March 31, 2019	116,250	$	21.38

A summary of the status of the Company’s performance based restricted stock units under the Veritex (Green) 2014 Plan as of March 31, 2019 and changes during the three months then ended, is as follows:



	Veritex (Green) 2014 Plan
	Performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	26,145	21.38
Outstanding at March 31, 2019	26,145	$	21.38

As of March 31, 2019, there was $2,750 of total unrecognized compensation related to outstanding performance based restricted stock units awarded under the Veritex (Green) 2014 Plan to be recognized over a remaining weighted average requisite service period of 2.75 years.

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the Veritex (Green) 2014 Plan as of March 31, 2019 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of March 31,
	2019
Non-performance based stock options exercised	$	558

Green Bancorp Inc. 2010 Stock Option Plan and Green Bancorp Inc. 2006 Stock Option Plan

In addition to the Veritex (Green) 2014 Plan discussed earlier in this Note, the Company assumed two stock and incentive plans in the Green acquisition, the Green Bancorp Inc. 2010 Stock Option Plan (“Green 2010 Plan”) and the Green Bancorp Inc. 2006 Stock Option Plan (“Green 2006 Plan”). For the Green 2010 Plan and the Green 2006 Plan, 768,628 and 11,850 of stock options, respectively, were converted in the acquisition of Green during the three months ended March 31, 2019. No stock options or restricted stock units were awarded from these plans during the three months ended March 31, 2019. During the three months ended March 31, 2019, 28,533 stock options were exercised from the Green 2010 Plan. No stock options were exercised from the Green 2006 Plan during the three months ended March 31, 2019. As of March 31, 2019, 740,095 exercisable stock options remain outstanding in the Green 2010 Plan and 11,850 exercisable stock options remain outstanding in the Green 2006 Plan.

Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income tax expense for the three months ended March 31, 2019 and 2018 was as follows:



	Three months ended March 31,
	2019			2018
Income tax expense for the period	$	1,989		$	3,511
Effective tax rate	21.2		%	25.3		%

In connection with the acquisition of Green, the Company assumed a liability of $2,155 for an uncertain tax position. This liability would, if recognized in full, affect the Company’s effective tax rate. The Company did not have any uncertain tax positions as of March 31, 2018.

Capital Requirements and Restrictions on Retained Earnings

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018 that the Company and the Bank met all capital adequacy requirements to which they were subject.

As of March 31, 2019 and December 31, 2018, 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 March 31, 2019 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 March 31, 2019
Total capital (to risk-weighted assets)
Company	$	847,480	12.45	%	$	544,565	8.0	%	n/a		n/a
Bank	811,440		11.93	%	544,134		8.0	%	$	680,168	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	783,015		11.50	%	408,530		6.0	%	n/a		n/a
Bank	789,837		11.61	%	408,184		6.0	%	544,246		8.0	%
Common equity tier 1 to risk-weighted assets
Company	753,158		11.07	%	306,162		4.5	%	n/a		n/a
Bank	789,837		11.61	%	306,138		4.5	%	442,200		6.5	%
Tier 1 capital (to average assets)
Company	783,015		10.57	%	296,316		4.0	%	n/a		n/a
Bank	789,837		10.65	%	296,652		4.0	%	370,815		5.0	%
As of December 31, 2018
Total capital (to risk-weighted assets)
Company	$	394,419	12.98	%	$	243,093	8.0	%	n/a		n/a
Bank	353,640		11.64	%	243,052		8.0	%	$	303,814	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	370,175		12.18	%	182,352		6.0	%	n/a		n/a
Bank	334,385		11.01	%	182,226		6.0	%	242,968		8.0	%
Common equity tier 1 to risk-weighted assets
Company	358,473		11.80	%	136,706		4.5	%	n/a		n/a
Bank	334,385		11.01	%	136,670		4.5	%	197,412		6.5	%
Tier 1 capital (to average assets)
Company	370,175		12.04	%	122,982		4.0	%	n/a		n/a
Bank	334,385		10.87	%	123,049		4.0	%	153,811		5.0	%

Dividend Restrictions — Dividends paid by the Bank are subject to certain restrictions imposed by regulatory agencies. The Basel III Capital Rules further limit the amount of dividends that may be paid by the Bank. Dividends of $6,816, or $0.125 per outstanding share on the record date of February 7, 2019, were paid by the Bank to the Company during the quarter ended March 31, 2019. No dividends were paid by the Bank to the Company during the year ended December 31, 2018.

- 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
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	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. Qualified Affordable Housing Investment As of March 31, 2019 and December 31, 2018, the balance of the investment for qualified affordable housing projects was $3,645 and $3,663, respectively. This balance is reflected in other securities on the condensed consolidated balance sheets. The total unfunded commitment related to the investment in certain qualified housing projects totaled $1,923 and $2,510 as of March 31, 2019 and December 31, 2018, respectively. The Company expects to fulfill these commitments during the year ended 2034.

Branch Assets and Liabilities Held For Sale

3 Months Ended

Mar. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Branch Assets and Liabilities Held For Sale

Branch Assets and Liabilities Held for Sale

Upon the acquisition of Green, the Company acquired branch assets held for sale and assumed branch liabilities held for sale pursuant to a purchase and assumption agreement entered into by Green with Keystone Bank, N.A. ("Keystone") prior the acquisition date, pursuant to which Keystone will acquire certain assets and deposits associated with one branch in the Austin metropolitan market. The transaction is expected to close in the second quarter of 2019 and will result in the Company exiting the Austin metropolitan market.

The following table presents the assets and liabilities held for sale as of March 31, 2019. There were no assets and liabilities held for sale as of December 31, 2018.



	March 31, 2019
Assets
Cash and cash equivalents	$	319
Loans	78,732
Bank premises, furniture and equipment	19
Intangible assets
Other assets	423
Total assets	$	79,493
Liabilities
Noninterest-bearing deposits	$	25,251
Interest-bearing transaction and savings deposits	36,970
Accounts payable and accrued expenses	122
Accrued interest payable and other liabilities	38
Total liabilities	$	62,381

Business Combinations

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Business Combinations

Green Bancorp, Inc.

On January 1, 2019, the Company completed its acquisition of Green. 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 Green exceeded the provisional value of the net assets acquired, goodwill of $206,821 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.

Consideration

Under the terms of the definitive agreement for the acquisition, each outstanding share of Green common stock and Green’s outstanding restricted stock units that accelerated vesting at maximum levels at the close date was converted into the right to receive 0.79 shares of the Company’s common stock, with cash paid in lieu of fractional shares. In addition, Green’s options that accelerated vesting at maximum levels on the close date were exchanged for an option to purchase Veritex common stock at the same 0.79 conversion rate. The Company issued 497,594 shares of Veritex common stock in regards to Green’s fully vested restricted stock units. In addition, Veritex was obligated to replace Green’s unvested options with 1,085,256 fully vested Veritex options. The following table presents the fair value of each class of consideration transferred at the close date.



Equivalent shares of Veritex common stock issued in exchange for Green outstanding shares	29,532,957
Veritex common stock price per share as of close date	$	21.38
Fair value of Veritex common stock issued in exchange for Green outstanding shares	$	631,415
Fair value of Green equity-based awards attributed to pre-combination service	12,484
Cash consideration to Green shareholders	10
Total consideration transferred	$	643,909

Fair Value

The measurement period for the Company to determine the fair values of acquired identifiable assets and assumed liabilities will end at the earlier of (i) 12 months from the date of the acquisition or (ii) as soon as the Company receives the information it was seeking about facts and circumstances that existed as of the acquisition date or learns that more information is not obtainable. Provisional estimates for investment securities, loans held for investment, bank premises, furniture and equipment, intangible assets, deferred and current taxes, deposits and subordinated debentures and subordinated notes have been recorded for the acquisition as independent valuations have not been finalized. The Company does not expect any significant differences from estimated values upon completion of the valuations. Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows:



	Estimate at January 1, 2019
Assets
Cash and cash equivalents	$	112,720
Investment securities	661,032
Other securities	40,287
Loans held for sale	9,360
Loans held for investment	3,245,492
Accrued interest receivable	11,673
Bank owned life insurance	56,841
Bank premises, furniture and equipment	39,426
Investment in unconsolidated subsidiaries	666
Intangible assets	65,718
Goodwill	206,821
Other assets	12,245
Right of use asset	9,373
Deferred Taxes	11,535
Current taxes	1,799
Branch assets held for sale	85,307
Total assets	$	4,570,295
Liabilities
Non-interest-bearing deposits	$	825,364
Interest-bearing deposits	1,300,825
Certificates and other time deposits	1,346,915
Accounts payable and other accrued expenses	26,587
Lease liability	9,373
Accrued interest payable	5,181
Securities sold under agreements to repurchase	3,226
Advances from Federal Home Loan Bank	300,000
Subordinated debentures and subordinated notes	56,233
Branch liabilities held for sale	52,682
Total liabilities	$	3,926,386

Acquisition-related Expenses

For the three months ended March 31, 2019, the Company incurred $31,217 pre-tax merger and acquisition expenses related to the Green acquisition which primarily consists of stock-based compensation due to the accelerated vesting of outstanding restricted stock units and stock options of $17,082, severance payments of $7,672 and legal and professional fees of $4,833. The Company incurred no acquisition expenses related to the Green acquisition for the three months ended March 31, 2018. Acquisition expenses are included in merger and acquisition expenses on the condensed consolidated statements of income.

Acquired Loans and Purchased Credit Impaired Loans

Acquired loans were preliminarily 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 Green.

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 preliminary fair value and contractual value of loans acquired from Green on January 1, 2019:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	113,772	$	1,802,008	$	1,915,780
Commercial	42,975		1,106,502		1,149,477
Mortgage warehouse	—		166,850		166,850
Consumer	184		13,201		13,385
Total fair value	156,931		3,088,561		3,245,492
Contractual principal balance	$	216,444	$	3,095,022	$	3,311,466

The following table presents preliminary additional information about PCI loans acquired from Green on January 1, 2019:



	PCI Loans
Contractually required principal and interest	$	251,607
Non-accretable difference	76,590
Cash flows expected to be collected	$	175,017
Accretable difference	18,086
Fair value of PCI loans	$	156,931

Intangible Assets

The acquisition resulted in a preliminary core deposit intangible of $65,718, which will be amortized on a straight line basis over the estimated life of 8 years.

Branch assets and liabilities held for sale

Branch assets and liabilies held for sale as of the close date are valued at fair value less cost to sell. The following table discloses the preliminary fair value information about branch assets and liabilities that met the definition of held for sale on January 1, 2019:



	January 1, 2019
Assets
Cash and cash equivalents	$	392
Loans	78,366
Bank premises, furniture and equipment	19
Intangible assets	6,013
Other assets	517
Total assets	$	85,307
Liabilities
Noninterest-bearing deposits	$	52,319
Accounts payable and accrued expenses	40
Accrued interest payable and other liabilities¹	323
Total liabilities	$	52,682

¹ Accrued interest payable and other liabilities includes $90 in expected selling costs.

Certificates and other time deposits

The acquisition resulted in a preliminary premium on time deposits of $7,318, which will be accreted on a straight line basis over the contractual lives of certificates and other time deposits, or an estimated weighted average life of 1.7 years.

Subordinated debt and subordinated debentures

The acquisition resulted in a preliminary premium on subordinated debt of $3,134 and a preliminary discount on subordinated debentures of $4,066, which will be accreted/amortized on a straight line basis over the estimated life of 2 years and 17.5 years, respectively.

Supplemental Pro Forma Information (unaudited)

The following table presents pro forma information for the quarter ended March 31, 2018 as if the Green acquisition was completed as of January 1, 2018. The pro forma results combine the historical results of Green into the Company's condensed consolidated statements of income including the impact of certain purchase accounting adjustments, including loan and investment discount accretion and intangible assets amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018:



Net Interest Income	$	68,314
Net Income	27,677

Basic earnings per share	$	0.51
Diluted earnings per share	0.52

Revenues and earnings of the acquired company since the acquisition date have not been disclosed as Green was merged into the Company and separate financial information is not readily available.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2019
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 March 31, 2019 and December 31, 2018, condensed consolidated results of operations for the three months ended March 31, 2019 and 2018, condensed consolidated stockholders’ equity for the three months ended March 31, 2019 and 2018 and condensed consolidated cash flows for the three months ended March 31, 2019 and 2018. 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, 2018 included within the Company’s Form 10-K as filed with the Securities and Exchange Commission on February 27, 2019. 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 activity 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 Company’s prior year financial statements were reclassified to conform to the current presentation, including (i) the reclassification of dividend income from other noninterest income into interest on other investments in order to align with industry peers for comparability purposes and (ii) the reclassification of $335 from professional and regulatory fees to merger and acquisition expense on the condensed consolidated statements of income for the three months ended March 31, 2018.
Earnings Per Share	Earnings Per Share Earnings per share (“EPS”) are based upon the weighted-average shares outstanding.
Certain Purchased Loans	Certain Purchased Loans The Company purchases individual loans and groups of loans, through both acquisitions of other banks and the normal course of its operations, some of which have shown evidence of credit deterioration since origination. These purchased credit impaired (“PCI”) loans are recorded at fair value at acquisition in a business combination, such that there is no carryover of the seller’s allowance for loan losses. After consummation of the acquisition, losses are recognized by an increase in the provision for loan losses. These PCI loans are accounted for individually or aggregated into pools of loans based on common risk characteristics such as credit grade, loan type, and date of origination. On the date of acquisition, the Company estimates the amount and timing of expected cash flows for each purchased loan or pool, and the expected cash flows in excess of carrying value are recorded as interest income over the estimated life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, except for present value changes solely due to changes in timing of cash flows, an impairment loss is recorded through the allowance for loan losses. If the present value of expected cash flows is greater than the carrying amount, any related allowance for loan loss is reversed, w
Derivative Financial Instruments	Derivative Financial Instruments The Company’s derivative instruments are entered into pursuant to a customer accommodation program under which the Company enters into an interest rate swap, cap agreement or an interest rate collar with a commercial customer and an agreement with offsetting terms with a correspondent bank. These derivative instruments are not designated as accounting hedges. Changes in net fair value are recognized in noninterest income or expense and the fair value amounts are included in other assets and other liabilities.
Loans Held-for-Sale	Loans Held for Sale Loans are classified as held-for-sale when management has positively determined that the loans will be sold in the foreseeable future and the Company has the ability to do so. The Company’s held for sale loans typically consist of certain government guaranteed loans or mortgage loans. The classification may be made upon origination or subsequent to origination or purchase. Once a decision has been made to sell loans not previously classified as held-for-sale, such loans are transferred into the held-for-sale classification and carried at the lower of cost or estimated fair value on an individual loan basis, except for those held for sale loans for which the Company elects to use the fair value option. The fair value of loans held for sale is based on commitments from investors or prevailing market prices. Gain on Sale of Mortgage Loans Held for Sale Mortgage loans held for sale are sold with servicing released. Gains and losses on sales of mortgage loans held for sale are based on the difference between the selling price and the carrying value of the related loan sold
Fair Value Option	Fair Value Option On a specific identification basis, the Company may elect the fair value option for certain financial instruments in the period the financial instrument was originated or acquired. Changes in fair value for instruments using the fair value option are recorded in noninterest income.
Gain on Sale of Guaranteed Portion of Loans, Net	Gain on Sale of Guaranteed Portion of Loans, Net The Company originates loans to customers under government guaranteed programs that generally provide for guarantees of 50% to 90% of each loan, subject to a maximum guaranteed amount. The Company can sell the guaranteed portion of the loan in an active secondary market and retains the unguaranteed portion in its portfolio. All sales of government guaranteed loans are executed on a servicing retained basis, and the Company retains the rights and obligations to service the loans. The standard sale structure provides for the Company to retain a portion of the cash flow from the interest payment received on the loan. When a loan sale involves the transfer of an interest less than the entire loan, the controlling accounting method under Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 860, Transfers and Servicing, requires the seller to reallocate the carrying basis between the assets transferred and the assets retained based on the relative fair value of the respective assets as of the date of sale. The maximum gain on sale that can be recognized is the difference between the fair value of the assets sold and the reallocated basis of the assets sold. The gain on sale recognized in income is the sum of the cash premium on the guaranteed loan, the fair value of the servicing assets recognized, less the discount recorded on the unguaranteed portion retained.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase represent the purchase of interests in securities by the Company’s customers. Securities sold under agreements to repurchase are stated at the amount of cash received in connection with the transaction. The Company does not account for any of its repurchase agreements as sales for accounting purposes in its financial statements. Repurchase agreements are settled on the following business day. All securities sold under agreements to repurchase are collateralized by pledged securities. The securities underlying the repurchase agreements are held in safekeeping by the Bank’s safekeeping agent.
Securities Held to Maturity	Securities Held-to-Maturity Securities classified as held-to-maturity are carried at cost, adjusted for the amortization of premiums and the accretion of discounts. The Company has the positive intent, and the ability, to hold these assets until their respective maturities.
Goodwill	Goodwill The Company evaluates goodwill for impairment on an annual basis or on an interim basis if an event occurs or circumstances change that would more likely than not reduce the fair value below its carrying amount, in accordance with ASC 350-20. During the three months ended March 31, 2019, the Company changed its annual goodwill impairment testing date from December 31 to October 31. The Company believes that the new date is preferable as it provides additional time prior to the Company’s fiscal year end to complete the annual goodwill impairment test, especially in the event the Company pursues potential future acquisitions and experiences growth. This change does not accelerate, delay, avoid or cause an impairment charge, nor does this change result in adjustments to the Company’s previously issued financial statements. There were no impairments of goodwill recorded during the three months ended March 31, 2019 and 2018.
Liability Classified Awards	Liability-Classified Awards The fair value of a liability award is determined on a quarterly basis beginning at the grant date until final vesting. Changes in the fair value of liability awards are recorded over the vesting period of the award. Changes in the fair value of liability awards that occur during the requisite service period are recognized as compensation cost over that period. The percentage of the fair value that is accrued as compensation cost at the end of each period equals the percentage of the requisite service that has been rendered at that date. Changes in the fair value of a liability award that occur after the end of the requisite service period are recognized as compensation cost in the period in which the changes occur. Any difference between the amount for which a liability award is settled and its fair value at the settlement date is an adjustment of compensation cost in the period of settlement. Compensation cost for liability awards is recorded in salaries and employee benefits
Adoption of New Accounting Standards and Recent Accounting Pronouncements	Adoption of New Accounting Standards FASB Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) (“ASU 2016-02”) requires that lessees and lessors recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU 2018-11, “Targeted Improvements.” The new standard was adopted by the Company on January 1, 2019. ASU 2016-02 provides for a modified retrospective transition approach requiring lessees to recognize and measure leases on the balance sheet at the beginning of either the earliest period presented or as of the beginning of the period of adoption. The Company elected to apply ASU 2016-02 as of the beginning of the period of adoption (January 1, 2019) and will not restate comparative periods. The Company has no material leasing arrangements for which it is the lessor of property or equipment. The Company has made an accounting policy election not to apply the recognition requirements in the new standard to short-term leases. The Company has elected to apply the package of practical expedients as both the lessor and lessee allowed by the new standard under which the Company need not reassess whether any expired or existing contracts are or contain leases, the Company need not reassess the lease classification for any expired or existing lease, and the Company need not reassess initial direct costs for any existing leases. The Company has also elected to use the practical expedient to make an accounting policy election for leases of certain underlying assets to include both lease and nonlease components as a single component and account for that single component as a lease. The Company’s operating leases relate primarily to office space and bank branches. Right-of-use (“ROU”) assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents the Company’s incremental borrowing rate at the lease commencement date. ROU assets are further adjusted for lease incentives, deferred rent and prepaid rent. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded in occupancy and equipment expense in the consolidated statements of income. As a result of implementing ASU 2016-02, the Company recognized an operating lease ROU asset of $18,705 and an operating lease liability of $18,753 on January 1, 2019, with no impact on our consolidated statement of income or consolidated statement of cash flows compared to the prior lease accounting model. The ROU asset and operating lease liability amounts recorded upon implementing ASU 2016-02 include the ROU asset and lease liability acquired/assumed from Green. Refer to Note 19 - Business Combinations for additional information. The ROU asset and operating lease liability are recorded in other assets and other liabilities, respectively, in the condensed consolidated balance sheets. See Note 9 - Leases for additional information. 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, with early adoption permitted on January 1, 2019. The Company expects ASU 2016-13 to have a significant impact on the Company’s accounting policies, internal control over financial reporting and footnote disclosures. The Company has assessed its system needs, has begun designing its financial models to estimate expected credit losses in accordance with the standard and continues to assess its data including the data acquired in connection with the acquisition of Green. Further development, testing and evaluation of those models is required to determine the impact that adoption of this standard will have on the financial condition and results of operations of the Company.

Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

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 months ended March 31, 2019 and 2018:



	Three Months Ended March 31,
	2019		2018
Earnings (numerator)
Net income	$	7,407	$	10,388
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS	54,293		24,120
Dilutive effect of employee stock-based awards	1,146		419
Adjusted weighted average shares outstanding	55,439		24,539
EPS:
Basic	$	0.14	$	0.43
Diluted	$	0.13	$	0.42

Supplemental Statement of Cash Flows (Tables)

3 Months Ended

Mar. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of Other Supplemental Cash Flow Information

Other supplemental cash flow information is presented below:



	Three Months Ended March 31,
	2019			2018
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$	14,975		$	4,928
Supplemental Disclosures of Non-Cash Flow Information:
Setup of ROU asset and lease liability upon adoption of ASC 842	$	9,380		$	—
Reclassification of lease intangibles, cease-use liability and deferred rent liability to ROU asset upon adoption of ASC 842	(48		)	—
Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital	788			—
Non-cash assets
Investment securities	$	661,032		$	—
Non-marketable equity securities	40,287			—
Loans held for sale	9,360			—
Loans held for investment	3,245,492			(4,622		)
Accrued interest receivable	11,673			—
Bank owned life insurance	56,841			—
Bank premises, furniture and equipment	39,426			1,162
Investment in unconsolidated subsidiaries	666			—
Intangible assets, net	65,718			(956		)
Goodwill	206,821			2,233
Other assets	12,245			1,934
Right of use asset	9,373			—
Deferred taxes	11,535			—
Current taxes	1,799			—
Assets held for sale	85,307			—
Total assets	$	4,457,575		$	(249	)
Non-cash liabilities assumed
Non-interest-bearing deposits	$	825,364		$	(303	)
Interest-bearing deposits	1,300,825			—
Certificates and other time deposits	1,346,915			—
Accounts payable and accrued expenses	26,587			—
Lease liability	9,373			—
Accrued interest payable and other liabilities	5,181			54
Securities sold under agreements to repurchase	3,226			—
Advances from Federal Home Loan Bank	300,000			—
Subordinated debentures and subordinated notes	56,233			—
Liabilities held for sale	52,682			—
Total liabilities	$	3,926,386		$	(249	)

Investment Securities (Tables)

3 Months Ended

Mar. 31, 2019

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:



	March 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale
Corporate bonds	$	42,269	$	352	$	245	$	42,376
Municipal securities	75,134		1,380		110		76,404
Mortgage-backed securities	325,707		4,352		880		329,179
Collateralized mortgage obligations	380,996		2,682		790		382,888
Small Business Administration ("SBA") guaranteed securities	91,362		2,159		40		93,481
	$	915,468	$	10,925	$	2,065	$	924,328

Held-to-maturity
Mortgage-backed securities	$	5,442	$	130	$	—	$	5,572
Municipal securities	20,901		512		—		21,413
	$	26,343	$	642	$	—	$	26,985



	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale
U.S. government agencies	$	9,096	$	—	$	118	$	8,978
Corporate bonds	26,518		84		134		26,468
Municipal securities	40,275		10		338		39,947
Mortgage-backed securities	97,117		101		2,167		95,051
Collateralized mortgage obligations	92,906		197		1,344		91,759
Asset-backed securities	492		—		—		492
	$	266,404	$	392	$	4,101	$	262,695

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



	March 31, 2019
	Less Than 12 Months				12 Months or More				Totals
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available-for-sale
Corporate bonds	$	8,597	$	91	$	3,660	$	154	$	12,257	$	245
Municipal securities	—		—		10,448		110		10,448		110
Mortgage-backed securities	95		1		52,554		879		52,649		880
Collateralized mortgage obligations	43,820		260		31,794		530		75,614		790
SBA guaranteed securities	—		—		7,279		40		7,279		40
	$	52,512	$	352	$	105,735	$	1,713	$	158,247	$	2,065



	December 31, 2018
	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	$	5,671	$	68	$	3,306	$	50	$	8,977	$	118
Municipal securities	16,043		92		10,428		246		26,471		338
Corporate bonds	6,689		134		—		—		6,689		134
Mortgage-backed securities	24,277		279		59,637		1,888		83,914		2,167
Collateralized mortgage obligations	18,765		71		42,536		1,273		61,301		1,344
	$	71,445	$	644	$	115,907	$	3,457	$	187,352	$	4,101

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



	March 31, 2019
	Available-for-sale				Held-to-Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	—	$	—	$	—	$	—
Due from one year to five years	7,997		8,115		—		—
Due from five years to ten years	52,733		52,720		730		734
Due after ten years	56,673		57,945		20,171		20,679
	117,403		118,780		20,901		21,413
Mortgage-backed securities and collateralized mortgage obligations	706,703		712,067		5,442		5,572
SBA guaranteed securities	91,362		93,481		—		—
	$	915,468	$	924,328	$	26,343	$	26,985



	December 31, 2018
	Available-for-sale
	Amortized Cost		Fair Value
Due in one year or less	$	2,963	$	2,966
Due from one year to five years	34,933		34,854
Due from five years to ten years	19,682		19,468
Due after ten years	18,311		18,105
	75,889		75,393
Mortgage-backed securities and collateralized mortgage obligations	190,023		186,810
Asset-backed securities	492		492
	$	266,404	$	262,695

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 three months ended March 31, 2019 and 2018 were as follows:



	Three Months Ended March 31,
	2019		2018
Proceeds from sales	$	108,865	$	30,149
Gross realized gains	1		323
Gross realized losses	773		315

Loans and Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Summary of Loans in the Accompanying Consolidated Balance Sheets

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



	March 31, 2019			December 31, 2018
Loans held for investment:
Real estate:
Construction and land	$	514,709		$	324,863
Farmland	10,028			10,528
1 - 4 family residential	570,599			297,917
Multi-family residential	287,713			51,285
Commercial real estate	2,446,557			1,103,032
Commercial	1,812,670			760,772
Mortgage warehouse	114,158			—
Consumer	21,766			7,112
	5,778,200			2,555,509
Deferred loan fees	(321		)	(15		)
Allowance for loan losses	(21,603		)	(19,255		)
	$	5,756,276		$	2,536,239

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



	March 31, 2019		December 31, 2018
Carrying amount	$	165,051	$	39,528
Outstanding balance	220,864		49,902

Changes in the accretable yield for PCI loans for the three months ended March 31, 2019 and 2018 are included in table below.



	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018
Balance at beginning of period	$	18,747		$	2,723
Additions	18,073			1,414
Reclassifications (to) from nonaccretable	(413		)	5,870
Accretion	(2,545		)	(1,868		)
Balance at end of period	$	33,862		$	8,139

Schedule of Non-Accrual Loans

Non-accrual loans aggregated by class of loans, as of March 31, 2019 and December 31, 2018, are as follows:



	Non-Accrual Loans
	March 31, 2019		December 31, 2018
Real estate:
Construction and land	$	2,399	$	2,399
Farmland	—		—
1 - 4 family residential	—		—
Multi-family residential	—		—
Commercial real estate	4,874		2,575
Commercial	11,410		19,769
Mortgage warehouse	—		—
Consumer	—		2
	$	18,683	$	24,745

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 March 31, 2019 and December 31, 2018 is as follows:



	March 31, 2019
	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
Real estate:
Construction and land	$	8,789	$	782	$	3,586	$	13,157	$	496,400	$	5,152	$	514,709	$	1,187
Farmland	—		—		—		—		10,028		—		10,028		—
1 - 4 family residential	4,583		386		330		5,299		557,744		7,556		570,599		330
Multi-family residential	—		—		—		—		287,713		—		287,713		—
Commercial real estate	2,435		4,284		5,379		12,098		2,333,414		101,045		2,446,557		505
Commercial	3,109		1,609		4,685		9,403		1,751,828		51,439		1,812,670		2,281
Mortgage warehouse	—		—		—		—		114,158		—		114,158		—
Consumer	302		7		—		309		21,302		155		21,766		—
	$	19,218	$	7,068	$	13,980	$	40,266	$	5,572,587	$	165,347	$	5,778,200	$	4,303



	December 31, 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	$	305	$	—	$	—	$	305	$	324,558	$	—	$	324,863	$	—
Farmland	—		—		—		—		10,528		—		10,528		—
1 - 4 family residential	131		266		—		397		297,435		85		297,917		—
Multi-family residential	—		—		—		—		51,285		—		51,285		—
Commercial real estate	3,465		—		—		3,465		1,082,559		17,008		1,103,032		—
Commercial	816		828		—		1,644		735,391		23,737		760,772		—
Consumer	10		—		—		10		7,102		—		7,112		—
	$	4,727	$	1,094	$	—	$	5,821	$	2,508,858	$	40,830	$	2,555,509	$	—

⁽¹⁾ Loans 90 days past due and still accruing excludes $527 of PCI loans as of December 31, 2018.

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

Impaired loans and TDRs at March 31, 2019 and December 31, 2018 are summarized in the following tables.



	March 31, 2019⁽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	$	2,399	$	688	$	1,711	$	2,399	$	166	$	2,529
Farmland	—		—		—		—		—		—
1 - 4 family residential	158		158		—		158		—		159
Multi-family residential	—		—		—		—		—		—
Commercial real estate	5,235		3,099		2,136		5,235		104		5,591
Commercial	3,834		541		3,293		3,834		1,212		4,684
Consumer	63		63		—		63		—		67
Total	$	11,689	$	4,549	$	7,140	$	11,689	$	1,482	$	13,030

⁽¹⁾Loans reported exclude PCI loans.



	December 31, 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	$	2,016	$	2,016	$	—	$	2,016	$	—	$	2,262
Farmland	—		—		—		—		—		—
1 - 4 family residential	542		542		—		542		—		565
Multi-family residential	—		—		—		—		—		—
Commercial real estate	2,939		2,939		—		2,939		—		3,032
Commercial	3,228		644		2,584		3,228		368		3,351
Consumer	66		66		—		66		—		79
Total	$	8,791	$	6,207	$	2,584	$	8,791	$	368	$	9,289

⁽¹⁾Loans reported exclude PCI loans.

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 March 31, 2019 and December 31, 2018:



	March 31, 2019
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	499,407	$	6,810	$	3,340	$	—	$	5,152	$	514,709
Farmland	10,028		—		—		—		—		10,028
1 - 4 family residential	562,306		386		351		—		7,556		570,599
Multi-family residential	287,713		—		—		—		—		287,713
Commercial real estate	2,305,261		8,237		32,014		—		101,045		2,446,557
Commercial	1,735,925		17,484		7,822		—		51,439		1,812,670
Mortgage warehouse	114,158		—		—		—		—		114,158
Consumer	21,465		—		146		—		155		21,766
Total	$	5,536,263	$	32,917	$	43,673	$	—	$	165,347	$	5,778,200



	December 31, 2018
	Pass		Special Mention		Substandard		Doubtful		PCI		Total
Real estate:
Construction and land	$	320,987	$	1,860	$	2,016	$	—	$	—	$	324,863
Farmland	10,528		—		—		—		—		10,528
1 - 4 family residential	296,870		236		726		—		85		297,917
Multi-family residential	51,285		—		—		—		—		51,285
Commercial real estate	1,065,982		7,056		12,986		—		17,008		1,103,032
Commercial	720,583		8,900		7,552		—		23,737		760,772
Consumer	6,950		—		162		—		—		7,112
Total	$	2,473,185	$	18,052	$	23,442	$	—	$	40,830	$	2,555,509

Schedule of Analysis of the Allowance for Loan Losses

An analysis of the allowance for loan losses for the three months ended March 31, 2019 and 2018 and year ended December 31, 2018 is as follows:



	Three Months Ended March 31, 2019			Year Ended December 31, 2018			Three Months Ended March 31, 2018
Balance at beginning of period	$	19,255		$	12,808		$	12,808
Provision charged to earnings	5,012			6,603			678
Charge-offs	(2,728		)	(197		)	(94		)
Recoveries	64			41			9
Net charge-offs	(2,664		)	(156		)	(85		)
Balance at end of period	$	21,603		$	19,255		$	13,401

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

The following tables summarize the activity in the allowance for loan losses by portfolio segment for the periods indicated.



	Three Months Ended March 31, 2019
	Real Estate
	Construction, Land and Farmland		Residential			Commercial Real Estate		Commercial			Consumer			Total
Balance at beginning of period	$	2,244	$	1,975		$	6,463	$	8,554		$	19		$	19,255
Provision (recapture) charged to earnings	507		(85		)	750		3,785			55			5,012
Charge-offs	—		—			—		(2,654		)	(74		)	(2,728		)
Recoveries	—		8			—		10			46			64
Net charge-offs	—		8			—		(2,644		)	(28		)	(2,664		)
Balance at end of period	$	2,751	$	1,898		$	7,213	$	9,695		$	46		$	21,603
Period-end amount allocated to:
Specific reserves	166		—			104		1,212			—			1,482
PCI reserves	—		—			—		296			—			296
General reserves	2,585		1,898			7,109		8,187			46			19,825
Total	$	2,751	$	1,898		$	7,213	$	9,695		$	46		$	21,603



	For the Year Ended December 31, 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	929		502		2,053		3,100			19			6,603
Charge-offs	—		—		—		(175		)	(22		)	(197		)
Recoveries	—		—		—		41			—			41
Net charge-offs (recoveries)	—		—		—		(134		)	(22		)	(156		)
Balance at end of period	$	2,244	$	1,975	$	6,463	$	8,554		$	19		$	19,255
Period-end amount allocated to:
Specific reserves	—		—		—		368			—			368
PCI reserves	—		—		—		1,302			—			1,302
General reserves	2,244		1,975		6,463		6,884			19			17,585
Total	$	2,244	$	1,975	$	6,463	$	8,554		$	19		$	19,255



	For the Three Months Ended March 31, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial			Consumer		Total
Balance at beginning of year	$	1,315	$	1,473	$	4,410	$	5,588		$	22	$	12,808
Provision (recapture) charged to earnings	111		117		552		(102		)	—		678
Charge-offs	—		—		—		(94		)	—		(94		)
Recoveries	—		—		—		9			—		9
Net charge-offs (recoveries)	—		—		—		(85		)	—		(85		)
Balance at end of period	$	1,426	$	1,590	$	4,962	$	5,401		$	22	$	13,401
Period-end amount allocated to:
Specific reserves	—		—		—		66			—		66
PCI reserves	—		—		—		—			—		—
General reserves	1,426		1,590		4,962		5,335			22		13,335
Total	$	1,426	$	1,590	$	4,962	$	5,401		$	22	$	13,401

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



	March 31, 2019
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,399	$	158	$	5,235	$	3,834	$	63	$	11,689
Loans collectively evaluated for impairment	517,186		850,598		2,340,277		1,871,555		21,548		5,601,164
PCI loans	5,152		7,556		101,045		51,439		155		165,347
Total	$	524,737	$	858,312	$	2,446,557	$	1,926,828	$	21,766	$	5,778,200



	December 31, 2018
	Real Estate
	Construction, Land and Farmland		Residential		Commercial Real Estate		Commercial		Consumer		Total
Loans individually evaluated for impairment	$	2,016	$	542	$	2,939	$	3,228	$	66	$	8,791
Loans collectively evaluated for impairment	333,375		348,575		1,083,085		733,807		7,046		2,505,888
PCI loans	—		85		17,008		23,737		—		40,830
Total	$	335,391	$	349,202	$	1,103,032	$	760,772	$	7,112	$	2,555,509

Schedule of Summary of Changes in Servicing Assets

The Company was servicing loans of approximately $228,638 and $74,946 as of March 31, 2019 and 2018, respectively. A summary of the changes in the related servicing assets are as follows:



	Three Months Ended March 31,
	2019			2018
Balance at beginning of period	$	1,304		$	1,215
Servicing asset acquired through acquisition	2,382			—
Increase from loan sales	461			92
Amortization charged to income	(175		)	(102		)
Balance at end of period	$	3,972		$	1,205

Fair Value (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis



	March 31, 2019
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Financial Assets:
Available-for-sale securities	$	—	$	924,328	$	—	$	924,328
Loans held for sale⁽¹⁾	—		7,259		—		7,259
Correspondent interest rate swaps	—		767		—		767
Customer interest rate swaps	—		2,453		—		2,453
Correspondent interest rate caps and collars	—		110		—		110
Financial Liabilities:
Correspondent interest rate swaps	—		2,715		—		2,715
Customer interest rate swaps	—		764		—		764
Customer interest rate caps and collars	—		110		—		110

⁽¹⁾ Represents loans held for sale elected to be carried at fair value upon origination or acquisition.



	December 31, 2018
	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Financial Assets:
Available-for-sale securities	$	—	$	262,695	$	—	$	262,695

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 March 31, 2019
Assets:
Impaired loans	$	—	$	—	$	7,140	$	7,140
Other real estate owned	—		—		151		151
As of December 31, 2018
Assets:
Impaired loans	—		—		2,584		2,584

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 March 31, 2019 and December 31, 2018 were as follows:



			Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
March 31, 2019
Financial assets:
Cash and cash equivalents	$	339,473	$	—	$	339,473	$	—
Held-to-maturity investments	26,343		—		26,985		—
Loans held for sale	8,003		—		8,003		—
Loans held for investment, mortgage warehouse	114,158		—		—		114,306
Loans held for investment	5,663,721		—		—		5,741,733
Accrued interest receivable	23,234		—		23,234		—
Bank-owned life insurance	79,397		—		79,397		—
Servicing asset	3,972		—		3,972		—
Other investments	75,920		—		75,920		—
Financial instruments assets held for sale	77,503		—		77,503		—
Financial liabilities:
Deposits	$	6,297,715			$	6,065,598	$	—
Advances from FHLB	252,982		—		255,753		—
Accrued interest payable	8,008		—		8,008		—
Subordinated debentures and subordinated notes	72,719		—		72,719		—
Securities sold under agreement to repurchase	2,778		—		2,778		—
Financial instruments liabilities held for sale	62,381		—		62,381		—
December 31, 2018
Financial assets:
Cash and cash equivalents	$	84,449	$	—	$	84,449	$	—
Loans held for sale	1,258		—		1,258		—
Loans held for investment	2,555,494		—		—		2,553,376
Accrued interest receivable	8,828		—		8,828		—
Bank-owned life insurance	22,064		—		22,064		—
Servicing asset	834		—		834		—
Other investments	22,822		—		22,822		—
Financial liabilities:
Deposits	$	2,622,428	$	—	$	2,506,379	$	—
Advances from FHLB	28,019		—		28,063		—
Accrued interest payable	1,135		—		1,135		—
Subordinated debentures and subordinated notes	16,691		—		16,691		—

Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments Outstanding

The following is a summary of the interest rate swaps outstanding as of March 31, 2019. We did not have interest rate swaps as of December 31, 2018.



	March 31, 2019
	Notional Amount		Fixed Rate	Floating Rate	Maturity	Fair Value
Non-hedging derivative instruments:
Customer interest rate derivatives:
Interest rate swaps - receive fixed/pay floating	$	174,946	2.94 - 8.47%	LIBOR 1 month + 0% - 5.00%	Wtd. Avg. 3.6 years	$	(1,948	)
Interest rate caps and collars	$	37,629	2.50 - 5.80%	LIBOR 1 month + 0% - 3.75%	Wtd. Avg. 1.5 years	$	110

Correspondent interest rate derivatives:
Interest rate swaps - pay fixed/receive floating	$	174,946	2.94 - 8.47%	LIBOR 1 month + 0% - 5.00%	Wtd. Avg. 3.6 years	$	1,689
Interest rate caps and collars	$	37,629	2.50 - 5.80%	LIBOR 1 month + 0% - 3.75%	Wtd. Avg. 1.5 years	$	(110	)

Schedule of Derivative Instruments in Balance Sheet

The notional amounts and estimated fair values of the non-hedging derivative instruments by classification as of March 31, 2019. The Company did not have non-hedging derivative instruments as of December 31, 2018.



	March 31, 2019
			Estimated Fair Value
	Notional Amount		Asset Derivative			Liability Derivative
Non-hedging interest rate derivatives:
Financial institution counterparty:
Interest rate swaps	$	174,946	$	767		$	2,715
Interest rate caps and collars	37,629		110			—
Commercial customer counterparty:
Interest rate swaps	174,946		2,453			764
Interest rate caps and collars	37,629		—			110
Gross derivatives			$	3,330		$	3,589
Offsetting derivative assets/liabilities			(235		)	(235		)
Net derivatives in the consolidated balance sheets			$	3,095		$	3,354

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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+ Details

Financial Instruments with Off-Balance Sheet Risk (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018:



	March 31,		December 31,
	2019		2018
Commitments to extend credit	$	1,693,207	$	962,436
Standby and commercial letters of credit	30,788		5,431
Total	$	1,723,995	$	967,867

Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Summary of lease costs

The table below summarizes the Company’s net lease cost:



	Three Months Ended March 31, 2019
Operating lease cost	$	1,384
Variable lease cost	263
Net lease cost	$	1,647

Summary of remaining lease liabilities



	March 31, 2019
Lease payments due:
Within one year	$	4,485
After one but within two years	3,832
After two but within three years	2,930
After three but within four years	2,536
After four but within five years	2,110
After five years	3,345
Total undiscounted cash flows	19,238
Less: Discount on cash flows	(1,509		)
Total lease liability	$	17,729

Intangible Assets and Goodwill (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019
	Weighted	Gross					Net
	Amortization	Intangible		Accumulated			Intangible
	Period	Assets		Amortization			Assets
Core deposit intangibles	7.7 years	$	81,769	$	6,853		$	74,916
Servicing asset	6.8 years	4,934		962			3,972
Intangible lease assets	2.4 years	4,765		2,408		—	2,357
		$	91,468	$	10,223		$	81,245



	As of December 31, 2018
	Weighted	Gross				Net
	Amortization	Intangible		Accumulated		Intangible
	Period	Assets		Amortization		Assets
Core deposit intangibles	7.7 years	$	16,051	$	4,376	$	11,675
Servicing asset	6.8 years	2,091		787		1,304
Intangible lease assets	2.7 years	5,282		2,365		2,917
		$	23,424	$	7,528	$	15,896

Schedule of Changes in Carry Value of Goodwill

Changes in the carrying amount of goodwill are summarized as follows for the three months ended March 31, 2019:



	March 31, 2019
Balance as of December 31, 2018	$	161,447
Effect of Green acquisition	206,821
Balance as of March 31, 2019	$	368,268

Deposits (Tables)

3 Months Ended

Mar. 31, 2019

Banking and Thrift [Abstract]

Schedule Summarized of the Deposits

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



	March 31, 2019		December 31, 2018
Noninterest-bearing demand accounts	$	1,439,630	$	626,283
Interest-bearing demand accounts	334,867		146,969
Savings accounts	113,253		33,147
Limited access money market accounts	2,169,049		1,133,045
Certificates of deposit, greater than $100	1,434,992		392,935
Certificates of deposit, less than $100	805,924		290,049
Total	$	6,297,715	$	2,622,428

Scheduled Maturities of Certificate of Deposits

As of March 31, 2019, the scheduled maturities of certificates of deposit were as follows:



Year	Amount
2019	$	1,852,426
2020	193,475
2021	100,403
2022	53,072
2023	41,592
Total	$	2,240,968

Advances from the Federal Home Loan Bank ("FHLB") (Tables)

3 Months Ended

Mar. 31, 2019

Banking and Thrift [Abstract]

Schedule of Contractual Maturities of FHLB Advances

Contractual maturities of FHLB advances at March 31, 2019 were as follows:



2019	$	225,000
2020	25,000
2022	2,982
Total	$	252,982

Subordinated Debentures and Subordinated Notes (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Subordinated Debentures

Subordinated Debentures Trust Preferred Securities



	March 31, 2019			December 31, 2018
Subordinated debentures	$	33,868		$	11,702
Debt discount	(4,011		)	—
Total subordinated debentures	$	29,857		$	11,702

A summary of information related to these two issues of subordinated debentures is set forth in the table below:



Description	Subordinated Debt Owed to Trusts		Interest Rate⁽¹⁾	Maturity Date
Patriot Bancshares Capital Trust I	$	5,155	3 month LIBOR +1.85%, not to exceed 11.90%	April 7, 2036
Patriot Bancshares Capital Trust II	$	17,011	3 month LIBOR +1.80%, not to exceed 11.90%	September 15, 2037

⁽¹⁾ The 3-month LIBOR in effect as of March 31, 2019 was 2.6%.

Subordinated Notes



	March 31, 2019		December 31, 2018
Subordinated notes	$	40,000	$	5,000
Unamortized debt premium (discount)	2,862		(11		)
Total subordinated notes	$	42,862	$	4,989

- Definition

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

+ References

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+ Details

Stock-Based and Liability-Classified Awards (Tables)

3 Months Ended

Mar. 31, 2019

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

Summary of Option Activity

A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of March 31, 2019, and changes during the three months then ended, is as follows:



	Veritex (Green) 2014 Plan
	Non-performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2019	—		$	—
Converted in acquisition of Green	304,778		15.41
Granted	211,793		21.38
Exercised	(28,033	)	12.89			—
Outstanding at March 31, 2019	488,538		$	23.28	8.35 years	$	2,977
Options exercisable at March 31, 2019	276,745		$	15.67	7.27 years	$	2,376
Weighted average fair value of options granted during the period			$	24.22

A summary of option activity under the 2010 Incentive Plan for the three months ended March 31, 2019 and 2018, 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, 2018	305,000		$	10.16	3.59 years
Exercised	(9,000	)	10.38
Outstanding at March 31, 2018	296,000		$	10.16	3.31 years
Options exercisable at March 31, 2018	290,000		$	10.12	3.25 years

Outstanding at January 1, 2019	275,000		$	10.12	2.39 years	$	3,098
Exercised	(15,000	)	10.28
Outstanding and exercisable at March 31, 2019	260,000		$	10.12	2.11 years	$	3,723

A summary of the status of the Company’s stock options under the 2014 Omnibus Plan as of March 31, 2019 and 2018, and changes during the three months then ended, is as follows:



	2014 Omnibus Plan
	Non-performance Based Stock Options
	Equity Awards							Liability Awards
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value		Shares Underlying Options	Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2018	332,706		$	22.71	8.86 years			—	$	—
Granted	112,593		27.63					—	—
Exercised	(1,983	)	14.95					—	—
Outstanding at March 31, 2018	443,316		$	23.95	8.89 years			—	$	—
Options exercisable at March 31, 2018	104,396		$	17.21	7.56 years			—	$	—

Outstanding at January 1, 2019	449,520		$	24.47	8.24 years			—	$	—
Granted	75,928		21.38					253,633	21.38
Forfeited	(4,445	)	21.38					—	—
Exercised	(11,848	)	15.37					—	—
Outstanding at March 31, 2019	509,155		$	23.28	8.28 years	$	1,191	253,633	$	21.38	9.76 years	$	605
Options exercisable at March 31, 2019	437,672		$	24.71	8.04 years	$	860	—	$	—
Weighted average fair value of options granted during the period			$	7.59					$	21.38

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



	2014 Omnibus Plan
	Non-performance Based
	Restricted Stock Units
	Equity Awards				Liability Awards
	Units		Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	150,722		$	13.29	—	$	—
Granted	34,500		28.05		—	—
Vested into shares	(8,399	)	25.13		—	—
Options exercisable at March 31, 2018	176,823		$	15.61	—	$	—

Outstanding at January 1, 2019	133,455		$	19.67	—	$	—
Granted	66,327		21.38		165,739	21.38
Vested into shares	(196,171	)	23.41		—	—
Outstanding at March 31, 2019	3,611		$	21.81	165,739	$	21.38



	2014 Omnibus Plan
	Performance Based
	Restricted Stock Units
	Equity Awards				Liability Awards
	Units		Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	53,594		$	8.72	—	$	—
Granted	40,269		27.59		—	—
Vested into shares	(26,623	)	18.83		—	—
Outstanding at March 31, 2018	67,240		$	16.01	—	$	—

Outstanding at January 1, 2019	63,988		$	21.28	—	$	—
Granted	29,282		21.38		32,249	21.38
Vested into shares	(51,284	)	25.31		—	—
Forfeited	(14,418	)	26.85		—	—
Outstanding at March 31, 2019	27,568		$	23.11	32,249	$	21.38

A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of March 31, 2018, and changes during the three 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, 2018	24,250		$	13.19
Vested into shares	(8,750	)	10.85
Forfeited	(500	)	10.85
Outstanding at March 31, 2018	15,000		$	14.99



	Veritex (Green) 2014 Plan
	Non-performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	116,250	21.38
Outstanding at March 31, 2019	116,250	$	21.38



	Veritex (Green) 2014 Plan
	Performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	26,145	21.38
Outstanding at March 31, 2019	26,145	$	21.38

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 March 31, 2019 and 2018 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 March 31, 2019 and 2018 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of March 31,
	2019	2018
Non-performance based stock options exercised	315	54
Non-performance based restricted stock units vested	1,096	745
Performance based restricted stock units vested	4,346	234

Veritex (Green) 2014 Plan

A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of March 31, 2019, and changes during the three months then ended, is as follows:



	Veritex (Green) 2014 Plan
	Non-performance Based Stock Options
	Shares Underlying Options		Weighted Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2019	—		$	—
Converted in acquisition of Green	304,778		15.41
Granted	211,793		21.38
Exercised	(28,033	)	12.89			—
Outstanding at March 31, 2019	488,538		$	23.28	8.35 years	$	2,977
Options exercisable at March 31, 2019	276,745		$	15.67	7.27 years	$	2,376
Weighted average fair value of options granted during the period			$	24.22



	Veritex (Green) 2014 Plan
	Non-performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	116,250	21.38
Outstanding at March 31, 2019	116,250	$	21.38



	Veritex (Green) 2014 Plan
	Performance Based
	Restricted Stock Units
	Units	Weighted Average Grant Date Fair Value
Outstanding at January 1, 2019	—	$	—
Granted	26,145	21.38
Outstanding at March 31, 2019	26,145	$	21.38

A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the Veritex (Green) 2014 Plan as of March 31, 2019 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of March 31,
	2019
Non-performance based stock options exercised	$	558

Green Bancorp Inc. 2010 Stock Option Plan and Green Bancorp Inc. 2006 Stock Option Plan

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

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 March 31, 2019 and 2018 is presented below:



	Fair Value of Options Exercised or Restricted Stock Units Vested as of March 31,
	2019	2018
Non-performance based stock options exercised	315	54
Non-performance based restricted stock units vested	1,096	745
Performance based restricted stock units vested	4,346	234



	Three Months Ended March 31,
	2019	2018
Dividend yield	0.00%	0.00%
Expected life	6.5 years	5.0 to 7.5 years
Expected volatility	29.67%	27.87% to 37.55%
Risk-free interest rate	2.56%	1.06% to 2.73%

Income Taxes Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense

Income tax expense for the three months ended March 31, 2019 and 2018 was as follows:



	Three months ended March 31,
	2019			2018
Income tax expense for the period	$	1,989		$	3,511
Effective tax rate	21.2		%	25.3		%

Capital Requirements and Restrictions on Retained Earnings (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019
Total capital (to risk-weighted assets)
Company	$	847,480	12.45	%	$	544,565	8.0	%	n/a		n/a
Bank	811,440		11.93	%	544,134		8.0	%	$	680,168	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	783,015		11.50	%	408,530		6.0	%	n/a		n/a
Bank	789,837		11.61	%	408,184		6.0	%	544,246		8.0	%
Common equity tier 1 to risk-weighted assets
Company	753,158		11.07	%	306,162		4.5	%	n/a		n/a
Bank	789,837		11.61	%	306,138		4.5	%	442,200		6.5	%
Tier 1 capital (to average assets)
Company	783,015		10.57	%	296,316		4.0	%	n/a		n/a
Bank	789,837		10.65	%	296,652		4.0	%	370,815		5.0	%
As of December 31, 2018
Total capital (to risk-weighted assets)
Company	$	394,419	12.98	%	$	243,093	8.0	%	n/a		n/a
Bank	353,640		11.64	%	243,052		8.0	%	$	303,814	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	370,175		12.18	%	182,352		6.0	%	n/a		n/a
Bank	334,385		11.01	%	182,226		6.0	%	242,968		8.0	%
Common equity tier 1 to risk-weighted assets
Company	358,473		11.80	%	136,706		4.5	%	n/a		n/a
Bank	334,385		11.01	%	136,670		4.5	%	197,412		6.5	%
Tier 1 capital (to average assets)
Company	370,175		12.04	%	122,982		4.0	%	n/a		n/a
Bank	334,385		10.87	%	123,049		4.0	%	153,811		5.0	%

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

3 Months Ended

Mar. 31, 2019

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 March 31, 2019. There were no assets and liabilities held for sale as of December 31, 2018.



	March 31, 2019
Assets
Cash and cash equivalents	$	319
Loans	78,732
Bank premises, furniture and equipment	19
Intangible assets
Other assets	423
Total assets	$	79,493
Liabilities
Noninterest-bearing deposits	$	25,251
Interest-bearing transaction and savings deposits	36,970
Accounts payable and accrued expenses	122
Accrued interest payable and other liabilities	38
Total liabilities	$	62,381

The following table discloses the preliminary fair value information about branch assets and liabilities that met the definition of held for sale on January 1, 2019:



	January 1, 2019
Assets
Cash and cash equivalents	$	392
Loans	78,366
Bank premises, furniture and equipment	19
Intangible assets	6,013
Other assets	517
Total assets	$	85,307
Liabilities
Noninterest-bearing deposits	$	52,319
Accounts payable and accrued expenses	40
Accrued interest payable and other liabilities¹	323
Total liabilities	$	52,682

¹ Accrued interest payable and other liabilities includes $90 in expected selling costs.

- 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.

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+ Details

Business Combinations (Tables)

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Schedule of Consideration Transferred

The following table presents the fair value of each class of consideration transferred at the close date.



Equivalent shares of Veritex common stock issued in exchange for Green outstanding shares	29,532,957
Veritex common stock price per share as of close date	$	21.38
Fair value of Veritex common stock issued in exchange for Green outstanding shares	$	631,415
Fair value of Green equity-based awards attributed to pre-combination service	12,484
Cash consideration to Green shareholders	10
Total consideration transferred	$	643,909

Schedule of Acquired Assets and Assumed Liabilities



	Estimate at January 1, 2019
Assets
Cash and cash equivalents	$	112,720
Investment securities	661,032
Other securities	40,287
Loans held for sale	9,360
Loans held for investment	3,245,492
Accrued interest receivable	11,673
Bank owned life insurance	56,841
Bank premises, furniture and equipment	39,426
Investment in unconsolidated subsidiaries	666
Intangible assets	65,718
Goodwill	206,821
Other assets	12,245
Right of use asset	9,373
Deferred Taxes	11,535
Current taxes	1,799
Branch assets held for sale	85,307
Total assets	$	4,570,295
Liabilities
Non-interest-bearing deposits	$	825,364
Interest-bearing deposits	1,300,825
Certificates and other time deposits	1,346,915
Accounts payable and other accrued expenses	26,587
Lease liability	9,373
Accrued interest payable	5,181
Securities sold under agreements to repurchase	3,226
Advances from Federal Home Loan Bank	300,000
Subordinated debentures and subordinated notes	56,233
Branch liabilities held for sale	52,682
Total liabilities	$	3,926,386

Summary of Loans Acquired in a Business Combination

The following table discloses the preliminary fair value and contractual value of loans acquired from Green on January 1, 2019:



	PCI loans		Other acquired loans		Total Acquired Loans
Real Estate	$	113,772	$	1,802,008	$	1,915,780
Commercial	42,975		1,106,502		1,149,477
Mortgage warehouse	—		166,850		166,850
Consumer	184		13,201		13,385
Total fair value	156,931		3,088,561		3,245,492
Contractual principal balance	$	216,444	$	3,095,022	$	3,311,466

The following table presents preliminary additional information about PCI loans acquired from Green on January 1, 2019:



	PCI Loans
Contractually required principal and interest	$	251,607
Non-accretable difference	76,590
Cash flows expected to be collected	$	175,017
Accretable difference	18,086
Fair value of PCI loans	$	156,931

Schedule of Assets and Liabilities Held For Sale

The following table presents the assets and liabilities held for sale as of March 31, 2019. There were no assets and liabilities held for sale as of December 31, 2018.



	March 31, 2019
Assets
Cash and cash equivalents	$	319
Loans	78,732
Bank premises, furniture and equipment	19
Intangible assets
Other assets	423
Total assets	$	79,493
Liabilities
Noninterest-bearing deposits	$	25,251
Interest-bearing transaction and savings deposits	36,970
Accounts payable and accrued expenses	122
Accrued interest payable and other liabilities	38
Total liabilities	$	62,381

The following table discloses the preliminary fair value information about branch assets and liabilities that met the definition of held for sale on January 1, 2019:



	January 1, 2019
Assets
Cash and cash equivalents	$	392
Loans	78,366
Bank premises, furniture and equipment	19
Intangible assets	6,013
Other assets	517
Total assets	$	85,307
Liabilities
Noninterest-bearing deposits	$	52,319
Accounts payable and accrued expenses	40
Accrued interest payable and other liabilities¹	323
Total liabilities	$	52,682

¹ Accrued interest payable and other liabilities includes $90 in expected selling costs.

Schedule of Supplemental Pro Forma Information

The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018:



Net Interest Income	$	68,314
Net Income	27,677

Basic earnings per share	$	0.51
Diluted earnings per share	0.52

- Definition

+ References

+ Details

Summary of Significant Accounting Policies - Additional Information (Details)		3 Months Ended
	Jan. 01, 2019 USD ($) branch	Mar. 31, 2019 USD ($) segment mortgage_office branch	Mar. 31, 2018 USD ($)
Nature of Organization:
Number of reportable segments \| segment		1
Merger and acquisition expense		$ 31,217,000	$ 335,000
Right-of-use asset		17,231,000
Lease liability		$ 17,729,000
Dallas-Fort Worth
Nature of Organization:
Number of branches \| branch		28
Number of mortgage offices \| mortgage_office		1
Houston
Nature of Organization:
Number of branches \| branch		13
Austin
Nature of Organization:
Number of branches \| branch		1
Louisville, Kentucky
Nature of Organization:
Number of branches \| branch		1
Accounting Standards Update 2016-02 [Member]
Nature of Organization:
Right-of-use asset	$ 18,705,000
Lease liability	$ 18,753,000
Green Bancorp, Inc.
Nature of Organization:
Number of branches \| branch	21
Merger and acquisition expense		$ 31,217,000	$ 0

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings (numerator)
Net income	$ 7,407	$ 10,388
Shares (denominator) in thousands
Weighted average shares outstanding for basic EPS (in shares)	54,293	24,120
Dilutive effect of employee stock based awards (in shares)	1,146	419
Adjusted weighted average shares outstanding (in shares)	55,439	24,539
EPS:
Basic (in dollars per share)	$ 0.14	$ 0.43
Diluted (in dollars per share)	$ 0.13	$ 0.42

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

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

+ References + Details

Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Excluded from diluted EPS weighted average shares (in shares)	0	0

Supplemental Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$ 14,975	$ 4,928
Supplemental Disclosures of Non-Cash Flow Information:
ROU assets obtained in exchanged for lease liabilities	9,380
Reclassification of lease intangibles, cease-use liability and deferred rent to ROU asset	(48)
Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital	788	0
Non-cash assets
Investment securities	661,032	0
Non-marketable equity securities	40,287	0
Loans held for sale	9,360	0
Loans held for investment	3,245,492	(4,622)
Accrued interest receivable	11,673	0
Bank owned life insurance	56,841	0
Bank premises, furniture and equipment	39,426	1,162
Investment in unconsolidated subsidiaries	666	0
Intangible assets, net	65,718	(956)
Goodwill	206,821	2,233
Other assets	12,245	1,934
Right of use asset	9,373
Deferred taxes	11,535	0
Current taxes	1,799	0
Assets held for sale	85,307	0
Total assets	4,457,575	(249)
Noncash liabilities assumed:
Non-interest-bearing deposits	825,364	(303)
Interest-bearing deposits	1,300,825	0
Certificates and other time deposits	1,346,915	0
Accounts payable and accrued expenses	26,587	0
Lease liability	9,373
Accrued interest payable and other liabilities	5,181	54
Securities sold under agreements to repurchase	3,226	0
Advances from Federal Home Loan Bank	300,000	0
Subordinated debentures and subordinated notes	56,233	0
Liabilities held for sale	52,682	0
Total liabilities	$ 3,926,386	$ (249)

Share Transactions - (Details) - Common Stock - USD ($)	3 Months Ended
Share Transactions - (Details) - Common Stock - USD ($)	Mar. 31, 2019	Jan. 28, 2019
Equity, Class of Treasury Stock [Line Items]
Stock buyback program, authorized amount		$ 50,000,000
Shares repurchased (in shares)	316,600
Average price (in dollars per share)	$ 24.42

Investment Securities - Carrying Amount and Fair Values (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2019	Dec. 31, 2018
Available-for-sale
Amortized Cost		$ 915,468	$ 266,404
Gross Unrealized Gains		10,925	392
Gross Unrealized Losses		2,065	4,101
Fair Value		924,328	262,695
Held-to-maturity
Amortized Cost		26,343	0
Gross Unrealized Gains		642
Gross Unrealized Losses		0
Fair Value		26,985
U.S. government agencies
Available-for-sale
Amortized Cost			9,096
Gross Unrealized Gains			0
Gross Unrealized Losses			118
Fair Value			8,978
Corporate bonds
Available-for-sale
Amortized Cost		42,269	26,518
Gross Unrealized Gains		352	84
Gross Unrealized Losses		245	134
Fair Value		42,376	26,468
Municipal securities
Available-for-sale
Amortized Cost		75,134	40,275
Gross Unrealized Gains		1,380	10
Gross Unrealized Losses		110	338
Fair Value		76,404	39,947
Held-to-maturity
Amortized Cost		20,901
Gross Unrealized Gains		512
Gross Unrealized Losses		0
Fair Value		21,413
Debt securities, transfer, amount	$ 4,758
Mortgage-backed securities
Available-for-sale
Amortized Cost		325,707	97,117
Gross Unrealized Gains		4,352	101
Gross Unrealized Losses		880	2,167
Fair Value		329,179	95,051
Held-to-maturity
Amortized Cost		5,442
Gross Unrealized Gains		130
Gross Unrealized Losses		0
Fair Value		5,572
Debt securities, transfer, amount	$ 3,045
Collateralized mortgage obligations
Available-for-sale
Amortized Cost		380,996	92,906
Gross Unrealized Gains		2,682	197
Gross Unrealized Losses		790	1,344
Fair Value		382,888	91,759
Small Business Administration (SBA) guaranteed securities
Available-for-sale
Amortized Cost		91,362
Gross Unrealized Gains		2,159
Gross Unrealized Losses		40
Fair Value		$ 93,481
Asset-backed securities
Available-for-sale
Amortized Cost			492
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Fair Value			$ 492

Investment Securities - Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2019 USD ($) investment	Dec. 31, 2018 USD ($) investment
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	$ 52,512	$ 71,445
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	105,735	115,907
Debt securities, available-for-sale, continuous unrealized loss position	158,247	187,352
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	352	644
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	1,713	3,457
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	$ 2,065	$ 4,101
Number of investment positions in an unrealized loss position (investments) \| investment	83	142
U.S. government agencies
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months		$ 5,671
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer		3,306
Debt securities, available-for-sale, continuous unrealized loss position		8,977
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss		68
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss		50
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss		118
Corporate bonds
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	$ 8,597	6,689
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	3,660	0
Debt securities, available-for-sale, continuous unrealized loss position	12,257	6,689
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	91	134
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	154	0
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	245	134
Municipal securities
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	0	16,043
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	10,448	10,428
Debt securities, available-for-sale, continuous unrealized loss position	10,448	26,471
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	0	92
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	110	246
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	110	338
Mortgage-backed securities
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	95	24,277
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	52,554	59,637
Debt securities, available-for-sale, continuous unrealized loss position	52,649	83,914
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	1	279
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	879	1,888
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	880	2,167
Collateralized mortgage obligations
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	43,820	18,765
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	31,794	42,536
Debt securities, available-for-sale, continuous unrealized loss position	75,614	61,301
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	260	71
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	530	1,273
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	790	$ 1,344
Small Business Administration (SBA) guaranteed securities
Fair Value
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer	7,279
Debt securities, available-for-sale, continuous unrealized loss position	7,279
Unrealized Loss
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 Months or longer, accumulated loss	40
Debt securities, available-for-sale, continuous unrealized loss position, accumulated loss	$ 40

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Available For Sale Amortized Cost
Due in one year or less	$ 0	$ 2,963
Due from one year to five years	7,997	34,933
Due from five years to ten years	52,733	19,682
Due after ten years	56,673	18,311
Total investment securities available for sale, single maturity date	117,403	75,889
Amortized Cost	915,468	266,404
Available For Sale Fair value
Due in one year or less	0	2,966
Due from one year to five years	8,115	34,854
Due from five years to ten years	52,720	19,468
Due after ten years	57,945	18,105
Total investment securities available for sale	118,780	75,393
Fair Value	924,328	262,695
Held-to-Maturity Amortized Cost
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	730
Due after ten years	20,171
Total investment securities held to maturity, single maturity date	20,901
Amortized Cost	26,343	0
Held-to-Maturity Fair Value
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	734
Due after ten years	20,679
Total investment securities held to maturity	21,413
Fair value	26,985
Mortgage-backed securities and collateralized mortgage obligations
Available For Sale Amortized Cost
Amortized cost	706,703	190,023
Amortized Cost	325,707	97,117
Available For Sale Fair value
Fair value	712,067	186,810
Fair Value	329,179	95,051
Held-to-Maturity Amortized Cost
Amortized cost	5,442
Amortized Cost	5,442
Held-to-Maturity Fair Value
Fair value	5,572
Fair value	5,572
Small Business Administration (SBA) guaranteed securities
Available For Sale Amortized Cost
Amortized cost	91,362
Amortized Cost	91,362
Available For Sale Fair value
Fair value	93,481
Fair Value	93,481
Held-to-Maturity Amortized Cost
Amortized cost	0
Held-to-Maturity Fair Value
Fair value	$ 0
Asset-backed securities
Available For Sale Amortized Cost
Amortized cost		492
Amortized Cost		492
Available For Sale Fair value
Fair value		492
Fair Value		$ 492

Investment Securities - Proceeds and Gross Gains/Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Proceeds from sales of investment securities available for sale and gross gains and losses
Proceeds from sales	$ 108,865	$ 30,149
Gross realized gains	1	323
Gross realized losses	$ 773	$ 315

Loans and Allowance for Loan Losses - Balance Sheet Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Loans and Allowance for Loan Losses
Loans, gross	$ 5,778,200	$ 2,555,509
Deferred loan fees	(321)	(15)
Allowance for loan losses	(21,603)	(19,255)	$ (13,401)	$ (12,808)
Loans, net	5,756,276	2,536,239
PCI loans acquired	63,105	22,309
Discount on retained loans from sale	2,817	2,398
Commercial
Loans and Allowance for Loan Losses
Loans, gross	1,812,670	760,772
Allowance for loan losses	(9,695)	(8,554)	(5,401)	(5,588)
Mortgage Warehouse
Loans and Allowance for Loan Losses
Loans, gross	114,158	0
Consumer
Loans and Allowance for Loan Losses
Loans, gross	21,766	7,112
Allowance for loan losses	(46)	(19)	(22)	(22)
Construction, land & land development \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	514,709	324,863
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	10,028	10,528
Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	858,312	349,202
Allowance for loan losses	(1,898)	(1,975)	(1,590)	(1,473)
Commercial real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	2,446,557	1,103,032
Allowance for loan losses	(7,213)	(6,463)	$ (4,962)	$ (4,410)
1-4 family residential \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	570,599	297,917
Multifamily \| Real estate \| Real Estate
Loans and Allowance for Loan Losses
Loans, gross	$ 287,713	$ 51,285

Loans and Allowance for Loan Losses - Nonaccrual (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Loans and Allowance for Loan Losses
Nonaccrual	$ 18,683		$ 24,745
Loans and leases receivable, impaired, interest lost on nonaccrual loans	151	$ 0
Commercial
Loans and Allowance for Loan Losses
Nonaccrual	11,410		19,769
Mortgage Warehouse
Loans and Allowance for Loan Losses
Nonaccrual	0		0
Consumer
Loans and Allowance for Loan Losses
Nonaccrual	0		2
Construction, land & land development \| Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	2,399		2,399
Farmland \| Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	0		0
Real estate \| 1-4 family residential \| Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	0		0
Real estate \| Multifamily \| Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	0		0
Commercial real estate \| Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	4,874		2,575
PCI
Loans and Allowance for Loan Losses
Loans and leases receivable, impaired, interest lost on nonaccrual loans	$ 7,903		$ 16,902

Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Impaired Loans
Unpaid Contractual Principal Balance	$ 11,689	$ 8,791
Recorded Investment with No Allowance	4,549	6,207
Recorded Investment With Allowance	7,140	2,584
Total Recorded Investment	11,689	8,791
Related Allowance	1,482	368
Average Recorded Investment YTD	13,030	9,289
Commercial
Impaired Loans
Unpaid Contractual Principal Balance	3,834	3,228
Recorded Investment with No Allowance	541	644
Recorded Investment With Allowance	3,293	2,584
Total Recorded Investment	3,834	3,228
Related Allowance	1,212	368
Average Recorded Investment YTD	4,684	3,351
Consumer
Impaired Loans
Unpaid Contractual Principal Balance	63	66
Recorded Investment with No Allowance	63	66
Recorded Investment With Allowance	0	0
Total Recorded Investment	63	66
Related Allowance	0	0
Average Recorded Investment YTD	67	79
Construction, land & land development \| Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	2,399	2,016
Recorded Investment with No Allowance	688	2,016
Recorded Investment With Allowance	1,711	0
Total Recorded Investment	2,399	2,016
Related Allowance	166	0
Average Recorded Investment YTD	2,529	2,262
Farmland \| Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment YTD	0	0
Commercial real estate \| Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	5,235	2,939
Recorded Investment with No Allowance	3,099	2,939
Recorded Investment With Allowance	2,136	0
Total Recorded Investment	5,235	2,939
Related Allowance	104	0
Average Recorded Investment YTD	5,591	3,032
1-4 family residential \| Real estate \| Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	158	542
Recorded Investment with No Allowance	158	542
Recorded Investment With Allowance	0	0
Total Recorded Investment	158	542
Related Allowance	0	0
Average Recorded Investment YTD	159	565
Multifamily \| Real estate \| Real Estate
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment YTD	$ 0	$ 0

Loans and Allowance for Loan Losses - Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Loan	Mar. 31, 2018 Loan	Dec. 31, 2018 USD ($)
Receivables [Abstract]
Recorded investment for financing receivable, modifications \| $	$ 1,159		$ 1,171
Number of loans modified as TDRs for which there was a payment default		0
Financing receivable, modifications, subsequent default, number of contracts	0	0

Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Credit Quality Indicators
Loans	$ 5,778,200,000	$ 2,555,509,000
Pass
Credit Quality Indicators
Loans	5,536,263,000	2,473,185,000
Special Mention
Credit Quality Indicators
Loans	32,917,000	18,052,000
Substandard
Credit Quality Indicators
Loans	43,673,000	23,442,000
Doubtful
Credit Quality Indicators
Loans	0	0
PCI
Credit Quality Indicators
Loans		40,830,000
Commercial
Credit Quality Indicators
Loans	1,812,670,000	760,772,000
Commercial \| Pass
Credit Quality Indicators
Loans	1,735,925,000	720,583,000
Commercial \| Special Mention
Credit Quality Indicators
Loans	17,484,000	8,900,000
Commercial \| Substandard
Credit Quality Indicators
Loans	7,822,000	7,552,000
Commercial \| Doubtful
Credit Quality Indicators
Loans	0	0
Mortgage Warehouse
Credit Quality Indicators
Loans	114,158,000	0
Mortgage Warehouse \| Pass
Credit Quality Indicators
Loans	114,158,000
Mortgage Warehouse \| Special Mention
Credit Quality Indicators
Loans	0
Mortgage Warehouse \| Substandard
Credit Quality Indicators
Loans	0
Mortgage Warehouse \| Doubtful
Credit Quality Indicators
Loans	0
Consumer
Credit Quality Indicators
Loans	21,766,000	7,112,000
Consumer \| Pass
Credit Quality Indicators
Loans	21,465,000	6,950,000
Consumer \| Special Mention
Credit Quality Indicators
Loans	0	0
Consumer \| Substandard
Credit Quality Indicators
Loans	146,000	162,000
Consumer \| Doubtful
Credit Quality Indicators
Loans	0	0
Construction, land & land development \| Real Estate
Credit Quality Indicators
Loans	514,709,000	324,863,000
Construction, land & land development \| Real Estate \| Pass
Credit Quality Indicators
Loans	499,407,000	320,987,000
Construction, land & land development \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	6,810,000	1,860,000
Construction, land & land development \| Real Estate \| Substandard
Credit Quality Indicators
Loans	3,340,000	2,016,000
Construction, land & land development \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Farmland \| Real Estate
Credit Quality Indicators
Loans	10,028,000	10,528,000
Farmland \| Real Estate \| Pass
Credit Quality Indicators
Loans	10,028,000	10,528,000
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	858,312,000	349,202,000
Real estate \| Single Family \| Real Estate
Credit Quality Indicators
Loans	570,599,000	297,917,000
Real estate \| Single Family \| Real Estate \| Pass
Credit Quality Indicators
Loans	562,306,000	296,870,000
Real estate \| Single Family \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	386,000	236,000
Real estate \| Single Family \| Real Estate \| Substandard
Credit Quality Indicators
Loans	351,000	726,000
Real estate \| Single Family \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Real estate \| Multifamily \| Real Estate
Credit Quality Indicators
Loans	287,713,000	51,285,000
Real estate \| Multifamily \| Real Estate \| Pass
Credit Quality Indicators
Loans	287,713,000	51,285,000
Real estate \| Multifamily \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	0	0
Real estate \| Multifamily \| Real Estate \| Substandard
Credit Quality Indicators
Loans	0	0
Real estate \| Multifamily \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Commercial real estate \| Real Estate
Credit Quality Indicators
Loans	2,446,557,000	1,103,032,000
Commercial real estate \| Real Estate \| Pass
Credit Quality Indicators
Loans	2,305,261,000	1,065,982,000
Commercial real estate \| Real Estate \| Special Mention
Credit Quality Indicators
Loans	8,237,000	7,056,000
Commercial real estate \| Real Estate \| Substandard
Credit Quality Indicators
Loans	32,014,000	12,986,000
Commercial real estate \| Real Estate \| Doubtful
Credit Quality Indicators
Loans	0	0
Financial Asset Acquired with Credit Deterioration
Credit Quality Indicators
Loans	220,864,000	49,902,000
Financial Asset Acquired with Credit Deterioration \| PCI
Credit Quality Indicators
Loans	165,347,000	40,830,000
Financial Asset Acquired with Credit Deterioration \| Commercial \| PCI
Credit Quality Indicators
Loans	51,439,000	23,737,000
Financial Asset Acquired with Credit Deterioration \| Mortgage Warehouse \| PCI
Credit Quality Indicators
Loans	0
Financial Asset Acquired with Credit Deterioration \| Consumer \| PCI
Credit Quality Indicators
Loans	155,000	0
Financial Asset Acquired with Credit Deterioration \| Construction, land & land development \| Real Estate \| PCI
Credit Quality Indicators
Loans	5,152,000	0
Financial Asset Acquired with Credit Deterioration \| Farmland \| Real Estate \| PCI
Credit Quality Indicators
Loans	0	0
Financial Asset Acquired with Credit Deterioration \| Real estate \| Single Family \| Real Estate \| PCI
Credit Quality Indicators
Loans	7,556,000	85,000
Financial Asset Acquired with Credit Deterioration \| Real estate \| Multifamily \| Real Estate \| PCI
Credit Quality Indicators
Loans	0	0
Financial Asset Acquired with Credit Deterioration \| Commercial real estate \| Real Estate \| PCI
Credit Quality Indicators
Loans	$ 101,045,000	$ 17,008,000

Loans and Allowance for Loan Losses - Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Analysis of allowance for loan losses
Balance at beginning of period	$ 19,255	$ 12,808	$ 12,808
Provision (recapture) charged to earnings	5,012	678	6,603
Charge-offs	(2,728)	(94)	(197)
Recoveries	64	9	41
Net charge-offs (recoveries)	(2,664)	(85)	(156)
Balance at end of period	21,603	13,401	19,255
Allowance for loan losses (as a percent)				0.37%	0.75%	0.58%
Specific reserves
Total specific reserves				$ 1,482	$ 368	$ 66
PCI reserves				296	1,302	0
General reserves				19,825	17,585	13,335
Total	19,255	12,808	12,808	21,603	19,255	13,401
Commercial
Analysis of allowance for loan losses
Balance at beginning of period	8,554	5,588	5,588
Provision (recapture) charged to earnings	3,785	(102)	3,100
Charge-offs	(2,654)	(94)	(175)
Recoveries	10	9	41
Net charge-offs (recoveries)	(2,644)	(85)	(134)
Balance at end of period	9,695	5,401	8,554
Specific reserves
Total specific reserves				1,212	368	66
PCI reserves				296	1,302	0
General reserves				8,187	6,884	5,335
Total	8,554	5,588	5,588	9,695	8,554	5,401
Consumer
Analysis of allowance for loan losses
Balance at beginning of period	19	22	22
Provision (recapture) charged to earnings	55	0	19
Charge-offs	(74)	0	(22)
Recoveries	46	0	0
Net charge-offs (recoveries)	(28)	0	(22)
Balance at end of period	46	22	19
Specific reserves
Total specific reserves				0	0	0
PCI reserves				0	0	0
General reserves				46	19	22
Total	19	22	22	46	19	22
Construction, Land and Farmland \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	2,244	1,315	1,315
Provision (recapture) charged to earnings	507	111	929
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Balance at end of period	2,751	1,426	2,244
Specific reserves
Total specific reserves				166	0	0
PCI reserves				0	0	0
General reserves				2,585	2,244	1,426
Total	2,244	1,315	1,315	2,751	2,244	1,426
Residential \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	1,975	1,473	1,473
Provision (recapture) charged to earnings	(85)	117	502
Charge-offs	0	0	0
Recoveries	8	0	0
Net charge-offs (recoveries)	8	0	0
Balance at end of period	1,898	1,590	1,975
Specific reserves
Total specific reserves				0	0	0
PCI reserves				0	0	0
General reserves				1,898	1,975	1,590
Total	1,975	1,473	1,473	1,898	1,975	1,590
Commercial real estate \| Real Estate
Analysis of allowance for loan losses
Balance at beginning of period	6,463	4,410	4,410
Provision (recapture) charged to earnings	750	552	2,053
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Balance at end of period	7,213	4,962	6,463
Specific reserves
Total specific reserves				104	0	0
PCI reserves				0	0	0
General reserves				7,109	6,463	4,962
Total	$ 6,463	$ 4,410	$ 4,410	$ 7,213	$ 6,463	$ 4,962

Loans and Allowance for Loan Losses - Allowance, Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Allowance, impairment methodology
Loans individually evaluated for impairment	$ 11,689	$ 8,791
Loans collectively evaluated for impairment	5,601,164	2,505,888
Total loans	5,778,200	2,555,509
Commercial And Mortgage Warehouse
Allowance, impairment methodology
Loans individually evaluated for impairment	3,834	3,228
Loans collectively evaluated for impairment	1,871,555	733,807
Total loans	1,926,828	760,772
Consumer
Allowance, impairment methodology
Loans individually evaluated for impairment	63	66
Loans collectively evaluated for impairment	21,548	7,046
Total loans	21,766	7,112
Construction, Land and Farmland \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	2,399	2,016
Loans collectively evaluated for impairment	517,186	333,375
Total loans	524,737	335,391
Residential \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	158	542
Loans collectively evaluated for impairment	850,598	348,575
Total loans	858,312	349,202
Commercial real estate \| Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	5,235	2,939
Loans collectively evaluated for impairment	2,340,277	1,083,085
Total loans	2,446,557	1,103,032
Acquired Loans with Deteriorated Credit Quality
Allowance, impairment methodology
Loans receivable, net	165,347	40,830
Total loans	220,864	49,902
Acquired Loans with Deteriorated Credit Quality \| Commercial And Mortgage Warehouse
Allowance, impairment methodology
Loans receivable, net	51,439	23,737
Acquired Loans with Deteriorated Credit Quality \| Consumer
Allowance, impairment methodology
Loans receivable, net	155	0
Acquired Loans with Deteriorated Credit Quality \| Construction, Land and Farmland \| Real Estate
Allowance, impairment methodology
Loans receivable, net	5,152	0
Acquired Loans with Deteriorated Credit Quality \| Residential \| Real Estate
Allowance, impairment methodology
Loans receivable, net	7,556	85
Acquired Loans with Deteriorated Credit Quality \| Commercial real estate \| Real Estate
Allowance, impairment methodology
Loans receivable, net	$ 101,045	$ 17,008

Loans and Allowance for Loan Losses - PCI Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, net	$ 5,756,276	$ 2,536,239
Loans	5,778,200	2,555,509
Acquired Loans with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, net	165,051	39,528
Loans	$ 220,864	$ 49,902

Loans and Allowance for Loan Losses - PCI Accretable Yield Rollforward (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 18,747,000	$ 2,723,000
Additions	18,073,000	1,414,000
Reclassifications (to) from nonaccretable	(413,000)	5,870,000
Accretion	(2,545,000)	(1,868,000)
Balance at end of period	33,862,000	8,139,000
Cash collections of certain loans acquired in transfer accounted for as debt securities	$ 390,000	$ 0

Loans and Allowance for Loan Losses - Servicing Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Servicing Asset at Amortized Cost [Line Items]
Servicing asset	$ 228,638,000	$ 74,946,000
Summary of changes in related servicing assets
Balance at beginning of period	1,304,000	1,215,000
Servicing asset acquired through acquisition	2,382,000	0
Increase from loan sales	461,000	92,000
Amortization charged to income	(175,000)	(102,000)
Balance at end of period	3,972,000	1,205,000
Valuation allowance recorded	0	$ 0
Interest-only strip
Summary of changes in related servicing assets
Interest receivable	$ 0		$ 0

Fair Value - Recurring Basis (Details) - USD ($)	3 Months Ended
Fair Value - Recurring Basis (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Assets measured at fair value
Fair Value	$ 924,328,000		$ 262,695,000
Recurring
Assets measured at fair value
Fair Value	924,328,000		262,695,000
Loans held for sale	7,259,000
Liabilities measured at fair value			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
Loans held for sale	0
Recurring \| Level 2 Inputs
Assets measured at fair value
Fair Value	924,328,000		262,695,000
Loans held for sale	7,259,000
Recurring \| Level 3 Inputs
Assets measured at fair value
Fair Value	0		$ 0
Loans held for sale	0
Interest rate swaps \| Financial institution counterparty:
Assets measured at fair value
Derivative asset	767,000
Derivative liability	2,715,000
Interest rate swaps \| Financial institution counterparty: \| Level 1 Inputs
Assets measured at fair value
Derivative asset	0
Derivative liability	0
Interest rate swaps \| Financial institution counterparty: \| Level 2 Inputs
Assets measured at fair value
Derivative asset	767,000
Derivative liability	2,715,000
Interest rate swaps \| Financial institution counterparty: \| Level 3 Inputs
Assets measured at fair value
Derivative asset	0
Derivative liability	0
Interest rate swaps \| Commercial customer counterparty:
Assets measured at fair value
Derivative asset	2,453,000
Derivative liability	764,000
Interest rate swaps \| Commercial customer counterparty: \| Level 1 Inputs
Assets measured at fair value
Derivative asset	0
Derivative liability	0
Interest rate swaps \| Commercial customer counterparty: \| Level 2 Inputs
Assets measured at fair value
Derivative asset	2,453,000
Derivative liability	764,000
Interest rate swaps \| Commercial customer counterparty: \| Level 3 Inputs
Assets measured at fair value
Derivative asset	0
Derivative liability	0
Interest rate caps and collars \| Financial institution counterparty:
Assets measured at fair value
Derivative asset	110,000
Interest rate caps and collars \| Financial institution counterparty: \| Level 1 Inputs
Assets measured at fair value
Derivative asset	0
Interest rate caps and collars \| Financial institution counterparty: \| Level 2 Inputs
Assets measured at fair value
Derivative asset	110,000
Interest rate caps and collars \| Financial institution counterparty: \| Level 3 Inputs
Assets measured at fair value
Derivative asset	0
Interest rate caps and collars \| Commercial customer counterparty:
Assets measured at fair value
Derivative liability	110,000
Interest rate caps and collars \| Commercial customer counterparty: \| Level 1 Inputs
Assets measured at fair value
Derivative liability	0
Interest rate caps and collars \| Commercial customer counterparty: \| Level 2 Inputs
Assets measured at fair value
Derivative liability	110,000
Interest rate caps and collars \| Commercial customer counterparty: \| Level 3 Inputs
Assets measured at fair value
Derivative liability	$ 0

Fair Value - Non-recurring Basis (Details)	Mar. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($)
Assets measured at fair value
Impaired loans, specific allowance	$ 1,482,000	$ 368,000
Number of other real estate owned properties \| property	1
Non-recurring
Assets measured at fair value
Impaired loans	$ 7,140,000	2,584,000
Other real estate owned	151,000
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	7,140,000	$ 2,584,000
Other real estate owned	$ 151,000

Fair Value - Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financial assets:
Held-to-maturity investments	$ 26,985
Loans held for investment, mortgage warehouse	114,158	$ 0
Financial liabilities:
Securities sold under agreements to repurchase	2,778	0
Branch liabilities held for sale	62,381	0
Carrying Amount
Financial assets:
Cash and cash equivalents	339,473	84,449
Held-to-maturity investments	26,343
Loans held for sale	8,003	1,258
Loans held for investment, mortgage warehouse	114,158
Loans held for investment	5,663,721	2,555,494
Accrued interest receivable	23,234	8,828
Bank-owned life insurance	79,397	22,064
Servicing asset	3,972	834
Other investments	75,920	22,822
Financial instruments assets held for sale	77,503
Financial liabilities:
Deposits	6,297,715	2,622,428
Advances from FHLB	252,982	28,019
Accrued interest payable	8,008	1,135
Subordinated debentures and subordinated notes	72,719	16,691
Securities sold under agreements to repurchase	2,778
Branch liabilities held for sale	62,381
Level 1 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	0	0
Held-to-maturity investments	0
Loans held for sale	0	0
Loans held for investment, mortgage warehouse	0
Loans held for investment	0	0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Other investments	0	0
Financial instruments assets held for sale	0
Financial liabilities:
Deposits		0
Advances from FHLB	0	0
Accrued interest payable	0	0
Subordinated debentures and subordinated notes	0	0
Securities sold under agreements to repurchase	0
Branch liabilities held for sale	0
Level 2 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	339,473	84,449
Held-to-maturity investments	26,985
Loans held for sale	8,003	1,258
Loans held for investment, mortgage warehouse	0
Loans held for investment	0	0
Accrued interest receivable	23,234	8,828
Bank-owned life insurance	79,397	22,064
Servicing asset	3,972	834
Other investments	75,920	22,822
Financial instruments assets held for sale	77,503
Financial liabilities:
Deposits	6,065,598	2,506,379
Advances from FHLB	255,753	28,063
Accrued interest payable	8,008	1,135
Subordinated debentures and subordinated notes	72,719	16,691
Securities sold under agreements to repurchase	2,778
Branch liabilities held for sale	62,381
Level 3 Inputs \| Fair Value
Financial assets:
Cash and cash equivalents	0	0
Held-to-maturity investments	0
Loans held for sale	0	0
Loans held for investment, mortgage warehouse	114,306
Loans held for investment	5,741,733	2,553,376
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Other investments	0	0
Financial instruments assets held for sale	0
Financial liabilities:
Deposits	0	0
Advances from FHLB	0	0
Accrued interest payable	0	0
Subordinated debentures and subordinated notes	0	$ 0
Securities sold under agreements to repurchase	0
Branch liabilities held for sale	$ 0

Derivative Financial Instruments - Summary of Interest Rate Swaps Outstanding (Details) - Non-hedging derivatives $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Financial institution counterparty: \| Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 174,946
Maturity	3 years 7 months 6 days
Fair Value	$ (1,948)
Financial institution counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Notional Amount	$ 37,629
Maturity	1 year 6 months
Fair Value	$ 110
Commercial customer counterparty: \| Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 174,946
Maturity	3 years 7 months 6 days
Fair Value	$ 1,689
Commercial customer counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Notional Amount	$ 37,629
Maturity	1 year 6 months
Fair Value	$ (110)
Minimum \| Financial institution counterparty: \| Interest rate swaps
Derivative [Line Items]
Fixed Rate	2.94%
Minimum \| Financial institution counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	2.50%
Minimum \| Commercial customer counterparty: \| Interest rate swaps
Derivative [Line Items]
Fixed Rate	2.94%
Minimum \| Commercial customer counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	2.50%
Minimum \| LIBOR \| Financial institution counterparty: \| Interest rate swaps
Derivative [Line Items]
Floating Rate	0.00%
Minimum \| LIBOR \| Financial institution counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Floating Rate	0.00%
Minimum \| LIBOR \| Commercial customer counterparty: \| Interest rate swaps
Derivative [Line Items]
Floating Rate	0.00%
Minimum \| LIBOR \| Commercial customer counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Floating Rate	0.00%
Maximum \| Financial institution counterparty: \| Interest rate swaps
Derivative [Line Items]
Fixed Rate	8.47%
Maximum \| Financial institution counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	5.80%
Maximum \| Commercial customer counterparty: \| Interest rate swaps
Derivative [Line Items]
Fixed Rate	8.47%
Maximum \| Commercial customer counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	5.80%
Maximum \| LIBOR \| Financial institution counterparty: \| Interest rate swaps
Derivative [Line Items]
Floating Rate	5.00%
Maximum \| LIBOR \| Financial institution counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Floating Rate	3.75%
Maximum \| LIBOR \| Commercial customer counterparty: \| Interest rate swaps
Derivative [Line Items]
Floating Rate	5.00%
Maximum \| LIBOR \| Commercial customer counterparty: \| Interest rate caps and collars
Derivative [Line Items]
Floating Rate	3.75%

Derivative Financial Instruments - Balance Sheet Information (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Non-hedging derivatives
Asset Derivative
Gross derivatives	$ 3,330
Offsetting derivative assets/liabilities	(235)
Net derivatives in the consolidated balance sheets	3,095
Liability Derivative
Gross derivatives	3,589
Offsetting derivative assets/liabilities	(235)
Net derivatives in the consolidated balance sheets	3,354
Financial institution counterparty: \| Interest rate swaps
Asset Derivative
Gross derivatives	767
Liability Derivative
Gross derivatives	2,715
Financial institution counterparty: \| Interest rate caps and collars
Asset Derivative
Gross derivatives	110
Financial institution counterparty: \| Non-hedging derivatives \| Interest rate swaps
Derivative [Line Items]
Notional Amount	174,946
Asset Derivative
Gross derivatives	767
Liability Derivative
Gross derivatives	2,715
Financial institution counterparty: \| Non-hedging derivatives \| Interest rate caps and collars
Derivative [Line Items]
Notional Amount	37,629
Asset Derivative
Gross derivatives	110
Liability Derivative
Gross derivatives	0
Commercial customer counterparty: \| Interest rate swaps
Asset Derivative
Gross derivatives	2,453
Liability Derivative
Gross derivatives	764
Commercial customer counterparty: \| Interest rate caps and collars
Liability Derivative
Gross derivatives	110
Commercial customer counterparty: \| Non-hedging derivatives \| Interest rate swaps
Derivative [Line Items]
Notional Amount	174,946
Asset Derivative
Gross derivatives	2,453
Liability Derivative
Gross derivatives	764
Commercial customer counterparty: \| Non-hedging derivatives \| Interest rate caps and collars
Derivative [Line Items]
Notional Amount	37,629
Asset Derivative
Gross derivatives	0
Liability Derivative
Gross derivatives	$ 110

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financial instruments with off-balance sheet risk
Total commitments	$ 1,723,995	$ 967,867
Commitments to extend credit
Financial instruments with off-balance sheet risk
Total commitments	1,693,207	962,436
Standby and commercial letters of credit
Financial instruments with off-balance sheet risk
Total commitments	$ 30,788	$ 5,431

Leases (Details)	3 Months Ended
Leases (Details)	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Right-of-use asset	$ 17,231,000
Lease liability	17,729,000
Lease, Cost [Abstract]
Operating lease cost	1,384,000
Variable lease cost	263,000
Net lease cost	1,647,000
Operating cash flows from operating leases	$ 1,146,000
Weighted-average remaining lease term - operating leases, in years	3 years 2 months
Weighted-average discount rate - operating leases	1.50%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Extension options	5 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	8 years
Extension options	10 years

Leases - Maturity (Details)	Mar. 31, 2019 USD ($)
Leases [Abstract]
Within one year	$ 4,485,000
After one but within two years	3,832,000
After two but within three years	2,930,000
After three but within four years	2,536,000
After four but within five years	2,110,000
After five years	3,345,000
Total undiscounted cash flows	19,238,000
Less: Discount on cash flows	(1,509,000)
Total lease liability	$ 17,729,000

Intangible Assets and Goodwill - Summary Of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Asset	$ 91,468		$ 23,424
Accumulated Amortization	10,223		7,528
Net Intangible Asset	81,245		$ 15,896
Amortization of intangibles	$ 2,695	$ 1,205
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	7 years 8 months 9 days		7 years 8 months 12 days
Gross Intangible Asset	$ 81,769		$ 16,051
Accumulated Amortization	6,853		4,376
Net Intangible Asset	$ 74,916		$ 11,675
Servicing asset
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	6 years 9 months 18 days		6 years 9 months 18 days
Gross Intangible Asset	$ 4,934		$ 2,091
Accumulated Amortization	962		787
Net Intangible Asset	$ 3,972		$ 1,304
Intangible lease assets
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	2 years 4 months 17 days		2 years 8 months 12 days
Gross Intangible Asset	$ 4,765		$ 5,282
Accumulated Amortization	2,408		2,365
Net Intangible Asset	$ 2,357		$ 2,917

Intangible Assets and Goodwill - Summary of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
December 31, 2018	$ 161,447
Effect of Green acquisition	206,821
March 31, 2019	$ 368,268

Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Noninterest-bearing demand accounts	$ 1,439,630	$ 626,283
Interest-bearing demand accounts	334,867	146,969
Savings accounts	113,253	33,147
Limited access money market accounts	2,169,049	1,133,045
Certificates of deposit, greater than $100	1,434,992	392,935
Certificates of deposit, less than $100	805,924	290,049
Total deposits	$ 6,297,715	$ 2,622,428

Deposits - Scheduled Maturities of Certificates of Deposit (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
2019	$ 1,852,426
2020	193,475
2021	100,403
2022	53,072
2023	41,592
Total	$ 2,240,968	$ 682,984

Deposits - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Demand deposit overdrafts reclassified as loans	$ 304	$ 153
Brokered deposits	$ 621,966	$ 234,190

Advances from the Federal Home Loan Bank ("FHLB") - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank	$ 252,982	$ 28,019
Availability to borrow additional funds	$ 1,057,155
Weighted Average
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank, weighted average rate	2.62%

Advances from the Federal Home Loan Bank ("FHLB") - Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
2019	$ 225,000
2020	25,000
2022	2,982
Total	$ 252,982	$ 28,019

Subordinated Debentures and Subordinated Notes (Details) $ in Thousands		3 Months Ended
	Jan. 01, 2019 USD ($)	Mar. 31, 2019 USD ($) issuance	Dec. 31, 2018 USD ($)
LIBOR
Debt Instrument [Line Items]
Interest rate		2.60%
Subordinated Notes
Debt Instrument [Line Items]
Debt outstanding		$ 40,000	$ 5,000
Unamortized debt premium (discount)		2,862	(11)
Total subordinated debt		42,862	4,989
Subordinated Notes \| Fixed-to-Floating Rate Subordinated Notes
Debt Instrument [Line Items]
Interest rate	8.50%
Redemption price percentage	100.00%
Subordinated Notes \| Fixed-to-Floating Rate Subordinated Notes \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	6.685%
Subordinated Debentures Trust Preferred Securities
Debt Instrument [Line Items]
Debt outstanding		33,868	11,702
Unamortized debt premium (discount)		(4,011)	0
Total subordinated debt		29,857	$ 11,702
Subordinated Debentures Trust Preferred Securities \| Patriot Bancshares Capital Trust I
Debt Instrument [Line Items]
Debt outstanding		$ 5,155
Interest rate		11.90%
Subordinated Debentures Trust Preferred Securities \| Patriot Bancshares Capital Trust I \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.85%
Subordinated Debentures Trust Preferred Securities \| Patriot Bancshares Capital Trust II
Debt Instrument [Line Items]
Debt outstanding		$ 17,011
Interest rate		11.90%
Subordinated Debentures Trust Preferred Securities \| Patriot Bancshares Capital Trust II \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.80%
Subordinated Debt
Debt Instrument [Line Items]
Number of issuances \| issuance		2
Green Bancorp, Inc. \| Subordinated Notes \| Fixed-to-Floating Rate Subordinated Notes
Debt Instrument [Line Items]
Debt acquired	$ 35,000
Green Bancorp, Inc. \| Subordinated Debt
Debt Instrument [Line Items]
Purchase premium	3,134
Purchase discount	$ 4,066

Stock-Based and Liability-Classified Awards - 2010 Plan (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2019	Mar. 31, 2018
2010 Stock Option and Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 2	$ 5
Merger And Acquisition Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 10,129

Stock-Based and Liability-Classified Awards - 2010 Plan - Options (Details) - Nonperformance-based stock options - 2010 Stock Option and Equity Incentive Plan - USD ($)			3 Months Ended
	Jan. 01, 2018	Jan. 01, 2017	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Shares Underlying Options
Outstanding at beginning of period (in shares)	305,000		275,000	305,000
Exercised during the period (in shares)			(15,000)	(9,000)
Outstanding at the end of period (in shares)			260,000	296,000
Options exercisable at end of period (in shares)				290,000
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 10.16		$ 10.12	$ 10.16
Exercised during the period (in dollars per share)			10.28	10.38
Outstanding at the end of period (in dollars per share)			$ 10.12	10.16
Options exercisable at end of period (in dollars per share)				$ 10.12
Weighted Average Contractual Term
Weighted average contractual term, outstanding	2 years 4 months 21 days	3 years 7 months 2 days	2 years 1 month 11 days	3 years 3 months 22 days
Weighted average contractual term, exercisable				3 years 3 months
Additional disclosures
Aggregate intrinsic value of outstanding stock options			$ 3,723,000		$ 3,098,000
Unrecognized compensation expense			0	$ 7,000	$ 2,000
Non-performance based stock options exercised			390,000	255,000
Restricted stock units vested			$ 0	$ 245,000

Stock-Based and Liability-Classified Awards - 2010 Plan - Restricted Stock Units (Details) - Restricted Stock Units - 2010 Stock Option and Equity Incentive Plan - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Units
Nonvested at the beginning of the period (in shares)		24,250
Vested into shares (in shares)		(8,750)
Forfeited (in shares)		(500)
Nonvested at the end of the period (in shares)	0	15,000
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)		$ 13.19
Vested into shares (in dollars per share)		10.85
Forfeited (in dollars per share)		10.85
Nonvested at the end of the period (in dollars per share)		$ 14.99
Additional disclosures
Unrecognized compensation expense	$ 0	$ 12

Stock-Based and Liability-Classified Awards - Omnibus Plan (Details) $ in Thousands		1 Months Ended	3 Months Ended
	Jan. 01, 2019 shares	Jan. 31, 2019 shares	Mar. 31, 2019 USD ($) installment shares	Mar. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement By Share-based Payment Award, Award Vesting Rights, Installments \| installment			3
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost \| $			$ 5,535
Stock based compensation expense \| $				$ 474
Share based compensation cost and capitalized costs \| $			$ 1,508
Non-performance based restricted stock units \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that accelerated vested (in shares)	133,455
Number of shares awarded (in shares)			66,327	34,500
Share based compensation cost and capitalized costs \| $			$ 1,418
Liability Awards \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation cost and capitalized costs \| $			$ 708
Performance based restricted stock units \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that accelerated vested (in shares)	51,284
Number of shares awarded (in shares)			29,282	40,269
Percentage of outstanding shares canceled		67.00%
Number of shares canceled (in shares)		12,704
Nonperformance-based stock options \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)			75,928	112,593
Non-Performance Based Liability Restricted Stock Units \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)			165,739	0
Liability Performance Based Restricted Stock Units \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)			32,249	0
Liability Non Performance Based Stock Options \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)			253,633	0
Stock option \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that accelerated vested (in shares)	320,405
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement By Share-based Payment Award, Award Vesting Rights, Installments \| installment			3
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement By Share-based Payment Award, Award Vesting Rights, Installments \| installment			5

Stock-Based and Liability-Classified Awards - Vesting (Details)	3 Months Ended
	Mar. 31, 2019 company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of peer companies	15
Performance based restricted stock units \| Below the 24.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	24.90%
Vesting %	0.00%
Performance based restricted stock units \| Within the 25th to 49.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting %	50.00%
Performance based restricted stock units \| Within the 50th the 74.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting %	100.00%
Performance based restricted stock units \| At or above the 75th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	75.00%
Vesting %	150.00%
Performance based restricted stock units \| Minimum \| Within the 25th to 49.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	25.00%
Performance based restricted stock units \| Minimum \| Within the 50th the 74.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	50.00%
Performance based restricted stock units \| Maximum \| Within the 25th to 49.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	49.90%
Performance based restricted stock units \| Maximum \| Within the 50th the 74.9th percentile of Peer Group TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return relative to peer companies	74.90%

Stock-Based and Liability-Classified Awards - Omnibus Plan Black Scholes Assumptions - (Details) - Omnibus Plan	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
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)		27.87%
Expected volatility, maximum (as a percent)		37.55%
Expected volatility (as a percent)	29.67%
Risk-free interest rate, minimum (as a percent)		1.06%
Risk-free interest rate, maximum (as a percent)		2.73%
Risk-free interest rate (as a percent)	2.56%
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
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

Stock-Based and Liability-Classified Awards - Omnibus Plan - Options (Details) - Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Jan. 01, 2018	Jan. 01, 2017	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Nonperformance-based stock options
Shares Underlying Options
Outstanding at beginning of period (in shares)	332,706		449,520	332,706
Granted during the period (in shares)			75,928	112,593
Forfeited during the period (in shares)			(4,445)
Exercised during the period (in shares)			(11,848)	(1,983)
Outstanding at the end of period (in shares)			509,155	443,316
Options exercisable at end of period (in shares)			437,672	104,395.62
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 22.71		$ 24.47	$ 22.71
Granted during the period (in dollars per share)			21.38	27.63
Forfeited during the period (in dollars per share)			21.38
Exercised during the period (in dollars per share)			15.37	14.95
Outstanding at the end of period (in dollars per share)			23.28	23.95
Options exercisable at end of period (in dollars per share)			24.71	$ 17.21
Weighted average fair value of options granted during the period (in dollars per share)			$ 7.59
Weighted Average Contractual Term
Weighted average contractual term, outstanding	8 years 2 months 27 days	8 years 10 months 10 days	8 years 3 months 11 days	8 years 10 months 21 days
Weighted Average Contractual Term, exercisable			8 years 15 days	7 years 6 months 22 days
Additional disclosures
Aggregate intrinsic value of outstanding stock options			$ 1,191
Aggregate intrinsic value of exercisable stock options			$ 860
Liability Non Performance Based Stock Options
Shares Underlying Options
Outstanding at beginning of period (in shares)	0		0	0
Granted during the period (in shares)			253,633	0
Forfeited during the period (in shares)			0
Exercised during the period (in shares)			0	0
Outstanding at the end of period (in shares)			253,633	0
Options exercisable at end of period (in shares)			0	0
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 0.00		$ 0.00	$ 0.00
Granted during the period (in dollars per share)			21.38	0.00
Forfeited during the period (in dollars per share)			0.00
Exercised during the period (in dollars per share)			0.00	0.00
Outstanding at the end of period (in dollars per share)			21.38	0.00
Options exercisable at end of period (in dollars per share)			0.00	$ 0.00
Weighted average fair value of options granted during the period (in dollars per share)			$ 21.38
Weighted Average Contractual Term
Weighted average contractual term, outstanding			9 years 9 months 4 days
Weighted Average Contractual Term, exercisable
Additional disclosures
Aggregate intrinsic value of outstanding stock options			$ 605
Aggregate intrinsic value of exercisable stock options
Unrecognized compensation expense			2,180
Stock option
Additional disclosures
Unrecognized compensation expense			$ 497	$ 2,806	$ 2,103

Stock-Based and Liability-Classified Awards - Omnibus Plan - Restricted Stock Units (Details) - Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Non-performance based restricted stock units
Units
Nonvested at the beginning of the period (in shares)	133,455	150,722
Granted (in shares)	66,327	34,500
Vested into shares (in shares)	(196,171)	(8,399)
Nonvested at the end of the period (in shares)	3,611	176,823
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 19.67	$ 13.29
Granted (in dollars per share)	21.38	28.05
Vested into shares (in dollars per share)	23.41	25.13
Nonvested at the end of the period (in dollars per share)	$ 21.81	$ 15.61
Non-Performance Based Liability Restricted Stock Units
Units
Nonvested at the beginning of the period (in shares)	0	0
Granted (in shares)	165,739	0
Vested into shares (in shares)	0	0
Nonvested at the end of the period (in shares)	165,739	0
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 0.00	$ 0.00
Granted (in dollars per share)	21.38	0.00
Vested into shares (in dollars per share)	0.00	0.00
Nonvested at the end of the period (in dollars per share)	$ 21.38	$ 0.00
Performance based restricted stock units
Units
Nonvested at the beginning of the period (in shares)	63,988	53,594
Granted (in shares)	29,282	40,269
Vested into shares (in shares)	(51,284)	(26,623)
Forfeited (in shares)	(14,418)
Nonvested at the end of the period (in shares)	27,568	67,240
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 21.28	$ 8.72
Granted (in dollars per share)	21.38	27.59
Vested into shares (in dollars per share)	25.31	18.83
Forfeited (in dollars per share)	26.85
Nonvested at the end of the period (in dollars per share)	$ 23.11	$ 16.01
Liability Performance Based Restricted Stock Units
Units
Nonvested at the beginning of the period (in shares)	0	0
Granted (in shares)	32,249	0
Vested into shares (in shares)	0	0
Forfeited (in shares)	0
Nonvested at the end of the period (in shares)	32,249	0
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 0.00	$ 0.00
Granted (in dollars per share)	21.38	0.00
Vested into shares (in dollars per share)	0.00	0.00
Forfeited (in dollars per share)	0.00
Nonvested at the end of the period (in dollars per share)	$ 21.38	$ 0.00
Restricted Stock Units
Additional disclosures
Unrecognized compensation expense	$ 498	$ 5,097	$ 3,430
Liability Restricted Stock Units
Additional disclosures
Unrecognized compensation expense	$ 4,106

Stock-Based and Liability-Classified Awards - Fair Value Options Exercised or Restricted Stock Units Vested (Details) - Omnibus Plan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Non-performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-performance based stock options exercised	$ 315	$ 54
Restricted stock units vested	1,096	745
Performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vested	$ 4,346	$ 234

Stock-Based and Liability-Classified Awards - Veritex Green Omnibus Plan (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) plan shares	Dec. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock and incentive plans assumed in acquisition \| plan	2
Veritex Green Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense \| $	$ 385
Veritex Green Omnibus Plan \| Non-performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)	116,250
Veritex Green Omnibus Plan \| Performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded (in shares)	26,145
Veritex Green Omnibus Plan \| Nonperformance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)	211,793
Non-performance based stock options exercised \| $	$ 558
Converted in Green merger (in shares)	304,778
Exercise of employee stock options (in shares)	28,033
Shares outstanding (in shares)	488,538	0
Green Bancorp Inc. 2010 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)	0
Converted in Green merger (in shares)	768,628
Exercise of employee stock options (in shares)	28,533
Shares outstanding (in shares)	740,095
Green Bancorp Inc. 2010 Stock Option Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	0
Green Bancorp Inc. 2006 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded under stock options (in shares)	0
Converted in Green merger (in shares)	11,850
Shares outstanding (in shares)	11,850
Green Bancorp Inc. 2006 Stock Option Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	0

Stock-Based and Liability-Classified Awards - Veritex Green Omnibus Plan Options (Details) - Veritex Green Omnibus Plan - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Stock option
Weighted Exercise Price
Unrecognized compensation expense	$ 1,474
Requisite service period to recognize compensation cost	2 years 9 months
Nonperformance-based stock options
Shares Underlying Options
Outstanding at beginning of period (in shares)	0
Converted in Green merger (in shares)	304,778
Granted during the period (in shares)	211,793
Exercised during the period (in shares)	(28,033)
Outstanding at the end of period (in shares)	488,538
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 0.00
Converted in acquisition of Green (in dollars per share)		$ 15.41
Granted during the period (in dollars per share)	21.38
Exercised during the period (in dollars per share)	12.89
Outstanding at the end of period (in dollars per share)	$ 23.28
Weighted average contractual term, outstanding	8 years 4 months 6 days
Aggregate intrinsic value of outstanding stock options	$ 2,977
Options exercisable at end of period (in shares)	276,745
Options exercisable at end of period (in dollars per share)	$ 15.67
Weighted average contractual term, exercisable	7 years 3 months 7 days
Aggregate intrinsic value of exercisable stock options	$ 2,376
Weighted average fair value of options granted during the period (in dollars per share)	$ 24.22

Stock-Based and Liability-Classified Awards - Veritex Green Omnibus Plan Restricted Stock Units (Details) - Veritex Green Omnibus Plan $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares shares
Restricted Stock Units
Weighted Average Grant Date Fair Value
Unrecognized compensation expense \| $	$ 2,750
Requisite service period to recognize compensation cost	2 years 9 months
Performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Nonvested at the beginning of the period (in shares) \| shares	0
Number of shares awarded (in shares) \| shares	26,145
Nonvested at the end of the period (in shares) \| shares	26,145
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share) \| $ / shares	$ 0.00
Granted (in dollars per share) \| $ / shares	21.38
Nonvested at the end of the period (in dollars per share) \| $ / shares	$ 21.38
Non-performance based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Nonvested at the beginning of the period (in shares) \| shares	0
Number of shares awarded (in shares) \| shares	116,250
Nonvested at the end of the period (in shares) \| shares	116,250
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share) \| $ / shares	$ 0.00
Granted (in dollars per share) \| $ / shares	21.38
Nonvested at the end of the period (in dollars per share) \| $ / shares	$ 21.38

Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)		$ 1,989	$ 3,511
Effective tax rate (as a percent)		21.20%	25.30%
Liability for uncertain tax positions assumed	$ 2,155

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Qualified affordable housing investment	$ 3,645	$ 3,663
Qualified affordable housing project investments, unfunded commitment	$ 1,923	$ 2,510

Capital Requirements and Restrictions on Retained Earnings (Details) - USD ($)		12 Months Ended
	Feb. 07, 2019	Dec. 31, 2018	Mar. 31, 2019
Total capital (to risk weighted assets)
Actual Amount		$ 394,419,000	$ 847,480,000
Actual Ratio (as a percent)		12.98%	12.45%
For Capital Adequacy Purposes Amount		$ 243,093,000	$ 544,565,000
For Capital Adequacy Purposes Ratio (as a percent)		8.00%	8.00%
Tier 1 capital (to risk weighted assets)
Actual Amount		$ 370,175,000	$ 783,015,000
Actual Ratio (as a percent)		12.18%	11.50%
For Capital Adequacy Purposes Amount		$ 182,352,000	$ 408,530,000
For Capital Adequacy Purposes Ratio (as a percent)		6.00%	6.00%
Common equity tier 1 to risk weighted assets
Actual Amount		$ 358,473,000	$ 753,158,000
Actual Ratio (as a percent)		11.80%	11.07%
For Capital Adequacy Purposes Amount		$ 136,706,000	$ 306,162,000
For Capital Adequacy Purposes Amount (as a percent)		4.50%	4.50%
Tier 1 capital (to average assets)
Actual Amount		$ 370,175,000	$ 783,015,000
Actual Ratio (as a percent)		12.04%	10.57%
For Capital Adequacy Purposes Amount		$ 122,982,000	$ 296,316,000
For Capital Adequacy Purposes Ratio (as a percent)		4.00%	4.00%
Dividends paid	$ 6,816,000	$ 0
Dividends paid (in dollars per share)	$ 0.125
Bank
Total capital (to risk weighted assets)
Actual Amount		$ 353,640,000	$ 811,440,000
Actual Ratio (as a percent)		11.64%	11.93%
For Capital Adequacy Purposes Amount		$ 243,052,000	$ 544,134,000
For Capital Adequacy Purposes Ratio (as a percent)		8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount		$ 303,814,000	$ 680,168,000
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		$ 334,385,000	$ 789,837,000
Actual Ratio (as a percent)		11.01%	11.61%
For Capital Adequacy Purposes Amount		$ 182,226,000	$ 408,184,000
For Capital Adequacy Purposes Ratio (as a percent)		6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount		$ 242,968,000	$ 544,246,000
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		$ 334,385,000	$ 789,837,000
Actual Ratio (as a percent)		11.01%	11.61%
For Capital Adequacy Purposes Amount		$ 136,670,000	$ 306,138,000
For Capital Adequacy Purposes Amount (as a percent)		4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount		$ 197,412,000	$ 442,200,000
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		$ 334,385,000	$ 789,837,000
Actual Ratio (as a percent)		10.87%	10.65%
For Capital Adequacy Purposes Amount		$ 123,049,000	$ 296,652,000
For Capital Adequacy Purposes Ratio (as a percent)		4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount		$ 153,811,000	$ 370,815,000
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)		5.00%	5.00%

Branch Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Branch assets held for sale	$ 83,516		$ 0
Branch liabilities held for sale	62,381		$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	319	$ 392
Loans	78,732	78,366
Bank premises, furniture and equipment	19	19
Intangible assets		6,013
Other assets		517
Branch assets held for sale		85,307
Noninterest-bearing deposits	25,251	52,319
Interest-bearing transaction and savings deposits	36,970
Accounts payable and accrued expenses	122	40
Accrued interest payable and other liabilities	38	323
Branch liabilities held for sale	$ 62,381	$ 52,682

Business Combinations - Narrative (Details) - USD ($)		3 Months Ended
Business Combinations - Narrative (Details) - USD ($)	Jan. 01, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 368,268,000		$ 161,447,000
Merger and acquisition expense		31,217,000	$ 335,000
Green Bancorp, Inc.
Business Acquisition [Line Items]
Goodwill	$ 206,821,000
Share conversion rate (in shares)	0.79
Exercise of employee stock options (in shares)	1,085,256
Merger and acquisition expense		$ 31,217,000	$ 0
Premium on time deposits	$ 7,318,000
Amortization period	1 year 8 months
Subordinated Debt \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Purchase premium	$ 3,134,000
Purchase discount	$ 4,066,000
Purchase premium, accretion period	2 years
Purchase discount, amortization period	17 years 6 months
Core deposit intangibles \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Intangible assets, net	$ 65,700,000
Acquired intangible assets, weighted average useful life	8 years
Common Stock
Business Acquisition [Line Items]
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		194,735	34,068
Exercise of employee stock options (in shares)		73,468	4,901
Common Stock \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		497,594
Stock-Based Compensation \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Merger and acquisition expense		$ 17,082,000
Severance Payments \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Merger and acquisition expense		7,672,000
Legal And Professional Fees \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Merger and acquisition expense		$ 4,833,000

Business Combinations Business Combinations - Consideration Transferred (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2019
Business Acquisition [Line Items]
Equivalent shares of Veritex common stock issued in exchange for Green outstanding shares (in shares)		5,117,642
Green Bancorp, Inc.
Business Acquisition [Line Items]
Equivalent shares of Veritex common stock issued in exchange for Green outstanding shares (in shares)	29,532,957,000
Veritex common stock price per share as of close date (in dollars per share)	$ 21.38
Fair value of Veritex common stock issued in exchange for Green outstanding shares	$ 631,415
Fair value of Green equity-based awards attributed to pre-combination service	12,484
Cash consideration to Green shareholders	10
Total consideration transferred	$ 643,909

Business Combinations - Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets
Goodwill	$ 368,268		$ 161,447
Green Bancorp, Inc.
Assets
Cash and cash equivalents		$ 112,720
Investment securities		661,032
Other securities		40,287
Loans held for sale		9,360
Loans held for investment		3,245,492
Accrued interest receivable		11,673
Bank owned life insurance		56,841
Bank premises, furniture and equipment		39,426
Investment in unconsolidated subsidiaries		666
Intangible assets		65,718
Goodwill		206,821
Other assets		12,245
Right of use asset		9,373
Deferred Taxes		11,535
Current taxes		1,799
Branch assets held for sale		85,307
Total assets		4,570,295
Liabilities
Non-interest-bearing deposits		825,364
Interest-bearing deposits		1,300,825
Certificates and other time deposits		1,346,915
Accounts payable and other accrued expenses		26,587
Lease liability		9,373
Accrued interest payable		5,181
Securities sold under agreements to repurchase		3,226
Advances from Federal Home Loan Bank		300,000
Subordinated debentures and subordinated notes		56,233
Branch liabilities held for sale		52,682
Total liabilities		$ 3,926,386

Business Combinations - Loans Acquired (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Contractual principal balance	$ 63,105		$ 22,309
Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		$ 3,245,492
Contractual principal balance		3,311,466
Acquired Loans with Deteriorated Credit Quality \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		156,931
Contractual principal balance		216,444
Contractually required principal and interest		251,607
Non-accretable difference		76,590
Cash flows expected to be collected		175,017
Accretable difference		18,086
Real Estate \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,915,780
Real Estate \| Acquired Loans with Deteriorated Credit Quality \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		113,772
Commercial \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,149,477
Commercial \| Acquired Loans with Deteriorated Credit Quality \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		42,975
Mortgage Warehouse \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		166,850
Mortgage Warehouse \| Acquired Loans with Deteriorated Credit Quality \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		0
Consumer \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		13,385
Consumer \| Acquired Loans with Deteriorated Credit Quality \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		184
Other Acquired Loans \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		3,088,561
Contractual principal balance		3,095,022
Other Acquired Loans \| Real Estate \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,802,008
Other Acquired Loans \| Commercial \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,106,502
Other Acquired Loans \| Mortgage Warehouse \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		166,850
Other Acquired Loans \| Consumer \| Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		$ 13,201

Business Combinations - Assets Held For Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Branch assets held for sale	$ 83,516		$ 0
Branch liabilities held for sale	62,381		$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations
Business Acquisition [Line Items]
Cash and cash equivalents	319	$ 392
Loans	78,732	78,366
Bank premises, furniture and equipment	19	19
Intangible assets		6,013
Other assets		517
Branch assets held for sale		85,307
Noninterest-bearing deposits	25,251	52,319
Accounts payable and accrued expenses	122	40
Accrued interest payable and other liabilities	38	323
Branch liabilities held for sale	$ 62,381	52,682
Green Bancorp, Inc.
Business Acquisition [Line Items]
Expected selling costs		$ 90

Business Combinations Business Combinations - Pro Forma Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) $ / shares
Business Combinations [Abstract]
Net Interest Income \| $	$ 68,314
Net Income \| $	$ 27,677
Basic EPS (in dollars per share) \| $ / shares	$ 0.51
Diluted EPS (in dollars per share) \| $ / shares	$ 0.52

Loans and Allowance for Loan Losses - Past Due (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	$ 40,266,000	$ 5,821,000
Total Current	5,572,587,000	2,508,858,000
Total loans	5,778,200,000	2,555,509,000
Total 90 days past due and still accruing	4,303,000	0
30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	19,218,000	4,727,000
60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	7,068,000	1,094,000
90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	13,980,000	0
Commercial
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	9,403,000	1,644,000
Total Current	1,751,828,000	735,391,000
Total loans	1,812,670,000	760,772,000
Total 90 days past due and still accruing	2,281,000	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	3,109,000	816,000
Commercial \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	1,609,000	828,000
Commercial \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	4,685,000	0
Mortgage Warehouse
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0
Total Current	114,158,000
Total loans	114,158,000	0
Total 90 days past due and still accruing	0
Mortgage Warehouse \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0
Mortgage Warehouse \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0
Mortgage Warehouse \| 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0
Consumer
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	309,000	10,000
Total Current	21,302,000	7,102,000
Total loans	21,766,000	7,112,000
Total 90 days past due and still accruing	0	0
Consumer \| 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	302,000	10,000
Consumer \| 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	7,000	0
Consumer \| 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
Construction, land & land development \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	13,157,000	305,000
Total Current	496,400,000	324,558,000
Total loans	514,709,000	324,863,000
Total 90 days past due and still accruing	1,187,000	0
Construction, land & land development \| 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	8,789,000	305,000
Construction, land & land development \| 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	782,000	0
Construction, land & land development \| 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	3,586,000	0
Farmland \| 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	10,028,000	10,528,000
Total loans	10,028,000	10,528,000
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	0
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	858,312,000	349,202,000
Commercial real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	12,098,000	3,465,000
Total Current	2,333,414,000	1,082,559,000
Total loans	2,446,557,000	1,103,032,000
Total 90 days past due and still accruing	505,000	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	2,435,000	3,465,000
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	4,284,000	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	5,379,000	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	5,299,000	397,000
Total Current	557,744,000	297,435,000
Total loans	570,599,000	297,917,000
Total 90 days past due and still accruing	330,000	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	4,583,000	131,000
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	386,000	266,000
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	330,000	0
Multifamily \| 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	287,713,000	51,285,000
Total loans	287,713,000	51,285,000
Total 90 days past due and still accruing	0	0
Multifamily \| 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
Multifamily \| 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
Multifamily \| 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
Financial Asset Acquired with Credit Deterioration
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	220,864,000	49,902,000
Financial Asset Acquired with Credit Deterioration \| 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		527,000
PCI
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans		40,830,000
PCI \| Financial Asset Acquired with Credit Deterioration
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	165,347,000	40,830,000
PCI \| Financial Asset Acquired with Credit Deterioration \| Commercial
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	51,439,000	23,737,000
PCI \| Financial Asset Acquired with Credit Deterioration \| Mortgage Warehouse
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	0
PCI \| Financial Asset Acquired with Credit Deterioration \| Consumer
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	155,000	0
PCI \| Financial Asset Acquired with Credit Deterioration \| Construction, land & land development \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	5,152,000	0
PCI \| Financial Asset Acquired with Credit Deterioration \| Farmland \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	0	0
PCI \| Financial Asset Acquired with Credit Deterioration \| Commercial real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	101,045,000	17,008,000
PCI \| Financial Asset Acquired with Credit Deterioration \| 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 loans	7,556,000	85,000
PCI \| Financial Asset Acquired with Credit Deterioration \| Multifamily \| Real estate \| Real Estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total loans	$ 0	$ 0