Veritex (VBTX) 10-Q 25 Oct 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Oct. 24, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-36682
Entity Registrant Name	VERITEX HOLDINGS, INC.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	27-0973566
Entity Address, Address Line One	8214 Westchester Drive, Suite 800
Entity Address, City or Town	Dallas,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75225
City Area Code	(972)
Local Phone Number	349-6200
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	VBTX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		51,903,818
Entity Central Index Key	0001501570
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 72,107	$ 19,598
Interest bearing deposits in other banks	180,485	64,851
Total cash and cash equivalents	252,592	84,449
Securities available-for-sale, at fair value	990,274	262,695
Securities held-to-maturity (fair value of $35,177 at September 30, 2019)	33,119	0
Trust preferred securities	1,018	352
Federal Reserve Bank stock	33,782	12,324
Federal Home Loan Bank of Dallas stock	34,347	2,957
Other investments	20,648	7,541
Total investments	1,113,188	285,869
Loans held for sale	10,715	1,258
Less: Allowance for loan losses	(26,243)	(19,255)
Loans held for investment, net	5,861,361	2,536,239
Bank-owned life insurance	80,411	22,064
Bank premises, furniture and equipment, net	118,449	78,409
Other real estate owned	4,625	0
Intangible assets, net of accumulated amortization of $16,450 and $7,528, at September 30, 2019 and December 31, 2018	75,363	15,896
Goodwill	370,463	161,447
Other assets	75,716	22,919
Total assets	7,962,883	3,208,550
Deposits:
Noninterest-bearing deposits	1,473,126	626,283
Interest-bearing transaction and savings deposits	2,528,293	1,313,161
Certificates and other time deposits	1,876,427	682,984
Total deposits	5,877,846	2,622,428
Accounts payable and accrued expenses	45,475	5,413
Accrued interest payable	6,054	5,361
Advances from Federal Home Loan Bank	752,907	28,019
Subordinated debentures and subordinated notes	72,284	16,691
Securities sold under agreements to repurchase	2,787	0
Total liabilities	6,757,353	2,677,912
Commitments and contingencies (Note 16)
Stockholders’ equity:
Common stock, $0.01 par value; 75,000,000 shares authorized; 54,732,272 and 24,263,894 shares issued at September 30, 2019 and December 31, 2018, respectively; 52,373,169 and 24,253,894 shares outstanding at September 30, 2019 and December 31, 2018, respectively	524	243
Additional paid-in capital	1,114,659	449,427
Retained earnings	125,344	83,968
Accumulated other comprehensive income (loss)	23,837	(2,930)
Treasury stock, 2,359,103 and 10,000 shares at cost at September 30, 2019 and December 31, 2018, respectively	(58,834)	(70)
Total stockholders’ equity	1,205,530	530,638
Total liabilities and stockholders’ equity	7,962,883	3,208,550
Mortgage warehouse
ASSETS
Loans held for investment, mortgage warehouse	233,577	0
Real Estate, Commercial and Consumer Portfolio Segments
ASSETS
Loans held for investment, mortgage warehouse	$ 5,654,027	$ 2,555,494

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Held to maturity investments	$ 35,177
Intangible assets, accumulated amortization	$ 16,450	$ 7,528
Stockholders’ equity:
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)	54,732,272	24,263,894
Common stock, shares outstanding (in shares)	52,373,169	24,253,894
Treasury stock, shares (in shares)	2,359,103	10,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest and dividend income:
Loans, including fees	$ 85,811	$ 35,074	$ 258,344	$ 99,432
Securities	7,687	1,722	22,316	4,697
Deposits in financial institutions and Fed Funds sold	1,329	1,016	4,255	2,316
Other investments	816	108	2,129	442
Total interest and dividend income	95,643	37,920	287,044	106,887
Interest expense:
Transaction and savings deposits	10,381	4,694	32,152	12,187
Certificates and other time deposits	10,283	3,068	29,220	6,320
Advances from FHLB	3,081	630	7,323	1,324
Subordinated debentures and subordinated notes	1,024	250	3,116	727
Total interest expense	24,769	8,642	71,811	20,558
Net interest income	70,874	29,278	215,233	86,329
Provision for loan losses	9,674	3,057	18,021	5,239
Net interest income after provision for loan losses	61,200	26,221	197,212	81,090
Noninterest income:
Service charges and fees on deposit accounts	3,667	809	10,606	2,588
Loan fees	2,252	410	5,861	945
Loss on sales of investment securities	0	(34)	(1,414)	(22)
Net gain on sales of loans and other assets owned	853	270	4,327	1,267
Rental income	369	414	1,110	1,343
Other	1,289	539	2,458	1,335
Total noninterest income	8,430	2,408	22,948	7,456
Noninterest expense:
Salaries and employee benefits	17,530	7,394	53,874	22,981
Occupancy and equipment	4,044	2,890	12,187	8,267
Professional and regulatory fees	2,750	1,893	8,982	5,525
Data processing and software expense	2,252	697	6,485	2,214
Marketing	708	306	2,288	1,213
Amortization of intangibles	2,712	798	8,191	2,632
Telephone and communications	361	236	1,381	1,076
Merger and acquisition expense	1,035	2,692	38,042	4,070
Other	3,238	1,340	10,089	3,743
Total noninterest expense	34,630	18,246	141,519	51,721
Net income from operations	35,000	10,383	78,641	36,825
Income tax expense	7,595	1,448	16,953	7,309
Net income	$ 27,405	$ 8,935	$ 61,688	$ 29,516
Basic earnings per share (in dollars per share)	$ 0.52	$ 0.37	$ 1.15	$ 1.22
Diluted earnings per share (in dollars per share)	$ 0.51	$ 0.36	$ 1.13	$ 1.20

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 27,405	$ 8,935	$ 61,688	$ 29,516
Net unrealized gains (losses) on securities available for sale:
Change in net unrealized gains (losses) on securities available for sale during the period, net	7,212	(1,359)	29,892	(4,875)
Reclassification adjustment for net losses (gains) included in net income	0	34	1,414	22
Net unrealized gains (losses) on securities available for sale	7,212	(1,325)	31,306	(4,853)
Net unrealized gains on derivative instruments designated as cash flow hedges	413		2,033
Net unrealized gains on derivative instruments designated as cash flow hedges		0		0
Other comprehensive income (loss), before tax	7,625	(1,325)	33,339	(4,853)
Income tax expense (benefit)	1,529	(278)	6,572	(1,019)
Other comprehensive income (loss), net of tax	6,096	(1,047)	26,767	(3,834)
Comprehensive income	$ 33,501	$ 7,888	$ 88,455	$ 25,682

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Unallocated Employee Stock Ownership Plan Shares	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	10,000
Beginning balance at Dec. 31, 2017	$ 488,929	$ 241	$ (70)	$ 445,517	$ 44,627	$ (1,280)	$ (106)
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		74,706
Restricted stock units vested, net of shares withheld to cover tax withholdings	(445)	$ 1		(446)
Exercise of employee stock options (in shares)		7,401
Exercise of employee stock options	(29)			(29)
Stock based compensation	3,075			3,075
Net income	29,516				29,516
Other comprehensive (loss) income	(3,834)					(3,834)
Ending balance (in shares) at Sep. 30, 2018		24,191,622	10,000
Ending balance at Sep. 30, 2018	517,212	$ 242	$ (70)	448,117	74,143	(5,114)	(106)
Beginning balance (in shares) at Dec. 31, 2017		24,109,515	10,000
Beginning balance at Dec. 31, 2017	$ 488,929	$ 241	$ (70)	445,517	44,627	(1,280)	(106)
Ending balance (in shares) at Dec. 31, 2018	24,253,894	24,253,894	10,000
Ending balance at Dec. 31, 2018	$ 530,638	$ 243	$ (70)	449,427	83,968	(2,930)
Beginning balance (in shares) at Jun. 30, 2018		24,181,401	10,000
Beginning balance at Jun. 30, 2018	508,441	$ 242	$ (70)	447,234	65,208	(4,067)	(106)
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		10,221
Restricted stock units vested, net of shares withheld to cover tax withholdings	(56)			(56)
Stock based compensation	939			939
Net income	8,935				8,935
Other comprehensive (loss) income	(1,047)					(1,047)
Ending balance (in shares) at Sep. 30, 2018		24,191,622	10,000
Ending balance at Sep. 30, 2018	$ 517,212	$ 242	$ (70)	448,117	74,143	(5,114)	$ (106)
Beginning balance (in shares) at Dec. 31, 2018	24,253,894	24,253,894	10,000
Beginning balance at Dec. 31, 2018	$ 530,638	$ 243	$ (70)	449,427	83,968	(2,930)
Increase (Decrease) in Stockholders' Equity
Issuance of common shares in connection with the acquisition of Green Bancorp, Inc. (Green), net of offering costs of $788 (in shares)									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)		226,581							497,594
Restricted stock units vested, net of shares withheld to cover tax withholdings	(1,289)	$ 2		(1,291)				$ 12,484	$ 5	$ 12,479
Exercise of employee stock options (in shares)		211,246
Exercise of employee stock options	2,391	$ 2		2,389
Shares buyback (in shares)		2,349,103	2,349,103
Stock buyback	(58,787)	$ (23)	$ (58,764)
Stock based compensation	19,920			19,920
Reclassification of liability-classified awards to equity awards	1,403			1,403
Net income	61,688				61,688
Dividends paid	(20,312)				(20,312)
Other comprehensive (loss) income	$ 26,767					26,767
Ending balance (in shares) at Sep. 30, 2019	52,373,169	52,373,169	2,359,103
Ending balance at Sep. 30, 2019	$ 1,205,530	$ 524	$ (58,834)	1,114,659	125,344	23,837
Beginning balance (in shares) at Jun. 30, 2019		53,457,486	1,181,862
Beginning balance at Jun. 30, 2019	1,205,293	$ 535	$ (29,873)	1,112,238	104,652	17,741
Increase (Decrease) in Stockholders' Equity
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		352
Restricted stock units vested, net of shares withheld to cover tax withholdings	(6)			(6)
Exercise of employee stock options (in shares)		92,572
Exercise of employee stock options	999	$ 1		998
Shares buyback (in shares)		1,177,241	1,177,241
Stock buyback	(28,973)	$ (12)	$ (28,961)
Stock based compensation	1,429			1,429
Net income	27,405				27,405
Dividends paid	(6,713)				(6,713)
Other comprehensive (loss) income	$ 6,096					6,096
Ending balance (in shares) at Sep. 30, 2019	52,373,169	52,373,169	2,359,103
Ending balance at Sep. 30, 2019	$ 1,205,530	$ 524	$ (58,834)	$ 1,114,659	$ 125,344	$ 23,837

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Offering costs			$ 788
Restricted Stock Units
Shares withheld to cover tax withholdings (in shares)	148	1,379	53,734	14,978
Employee Stock Options
Shares withheld to cover tax withholdings (in shares)			13,709	1,691
Shares paid for cashless exercise (in shares)				4,391
Green Bancorp, Inc. | Restricted Stock Units
Shares withheld to cover tax withholdings (in shares)			25,872

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 61,688	$ 29,516
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of fixed assets and intangibles	12,372	5,350
Net accretion of time deposit and debt premium	(6,495)	0
Provision for loan losses	18,021	5,239
Accretion of loan purchase discount	(20,241)	(6,882)
Stock-based compensation expense	19,920	3,075
Compensation expense - liability-classified awards	1,403	0
Excess tax benefit from stock compensation	94	(168)
Net amortization of premiums on investment securities	1,887	1,478
Change in cash surrender value of bank-owned life insurance	(1,506)	(439)
Net loss (gain) on sales of investment securities	1,414	(22)
Change in fair value of held for sale Small Business Administration (SBA) loans using fair value option	(215)	0
Gain on sales of mortgage loans held for sale	(394)	(566)
Gain on sales of SBA loans	(3,933)	(701)
Impairment on servicing asset	188	0
Net originations of loans held for sale	(28,414)	(28,361)
Proceeds from sales of loans held for sale	28,926	28,343
Write down on other real estate owned	0	156
Net loss (gain) on sale of branches	474	(349)
(Increase) decrease in accrued interest receivable and other assets	(1,064)	670
(Decrease) increase in accounts payable, accrued expenses and accrued interest payable	(8,623)	2,502
Net cash provided by operating activities	75,502	38,841
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	7,153	(31,810)
Purchases of securities available for sale	(409,453)	(90,005)
Sales of securities available for sale	254,397	30,961
Proceeds from maturities, calls and pay downs of investment securities	90,079	24,615
Purchases of securities held to maturity	(8,137)	0
Maturity, calls and paydowns of securities held to maturity	1,214	0
Purchases of non-marketable equity securities, net	(26,332)	(13,685)
Net loans originated	(103,790)	(217,055)
Proceeds from sale of SBA loans	47,748	9,443
Net additions to bank premises and equipment	(6,395)	(3,194)
Proceeds from sales of other real estate owned	0	291
Net cash used in investing activities	(40,806)	(290,439)
Cash flows from financing activities:
Net change in deposits	(213,005)	377,927
Net change in advances from Federal Home Loan Bank	424,888	1,891
Net change in other borrowings	0	(15,000)
Net change in securities sold under agreement to repurchase	(439)	0
Payments to tax authorities for stock-based compensation	(1,289)	(501)
Proceeds from exercise of employee stock options	2,391	27
Purchase of treasury stock	(58,787)	0
Dividends paid	(20,312)	0
Net cash provided by financing activities	133,447	364,344
Net increase in cash and cash equivalents	168,143	112,746
Cash and cash equivalents at beginning of period	84,449	149,044
Cash and cash equivalents at end of period	$ 252,592	$ 261,790

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	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 26 branches and one mortgage office located in the Dallas-Fort Worth metroplex, twelve branches in the Houston 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 both perform periodic examinations to ensure regulatory compliance. On January 1, 2019 (the “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. 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, 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 unaudited condensed consolidated financial statements include all adjustments of a normal recurring nature necessary for a fair statement of the Company’s condensed consolidated financial position at September 30, 2019 and December 31, 2018 , condensed consolidated results of operations for the three and nine months ended September 30, 2019 and 2018 , condensed consolidated stockholders’ equity for the three and nine months ended September 30, 2019 and 2018 and condensed consolidated cash flows for the nine months ended September 30, 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 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 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 , 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 interest rate and credit risk. Accordingly, all significant operating decisions are based upon an 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 of $102 and $427 for the three and nine months ended September 30, 2018 , respectively, in order to align with industry peers for comparability purposes and (ii) the reclassification of $2,692 and $4,070 from professional and regulatory fees to merger and acquisition expense on the condensed consolidated statements of income for the three and nine months ended September 30, 2018 , respectively. Earnings Per Share Earnings per share (“EPS”) are based upon the Company’s weighted-average shares outstanding. The table below sets forth the reconciliation between weighted average shares used for calculating basic and diluted EPS for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands except per share amounts) Earnings (numerator) Net income $ 27,405 $ 8,935 $ 61,688 $ 29,516 Shares (denominator) Weighted average shares outstanding for basic EPS 52,915 24,176 53,721 24,151 Dilutive effect of employee stock-based awards 953 437 912 436 Adjusted weighted average shares outstanding 53,868 24,613 54,633 24,587 EPS: Basic $ 0.52 $ 0.37 $ 1.15 $ 1.22 Diluted $ 0.51 $ 0.36 $ 1.13 $ 1.20 For the three and nine months ended September 30, 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 has entered into certain derivative instruments pursuant to a customer accommodation program under which the Company enters into an interest rate swap, floor, cap or collar agreement with a commercial customer and an agreement with offsetting terms with a correspondent bank. These derivative instruments are not designated as accounting hedges and the 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. Interest Rate Swap, Floor, Cap and Collar Agreements Designated as Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps, floors, caps and collars to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. The entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The Company assesses the “effectiveness” of hedging derivatives on the date an arrangement was entered into and on a prospective basis at least quarterly. Hedge “effectiveness” is determined by the extent to which changes in the fair value of a derivative instrument offset changes in the fair value, cash flows or carrying value attributable to the risk being hedged. If the relationship between the change in the fair value of the derivative instrument and the change in the hedged item falls within a range considered to be the industry norm, the hedge is considered “highly effective” and qualifies for hedge accounting. A hedge is “ineffective” if the relationship between the changes falls outside the acceptable range. In that case, hedge accounting is discontinued on a prospective basis. The time value of the option is excluded from the assessment of effectiveness and is recognized in earnings using a straight-line amortization method over the life of the hedge arrangement. 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 for which the fair value option is not elected, refer to Note 1 in the Company’s Annual Report on 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 SBA Loans 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, which is recognized in income, is the sum of the cash premium on the guaranteed loan and the fair value of the servicing assets recognized, less the discount recorded on the unguaranteed portion of the loan retained by the Company. Gain on Sale of Mortgage Loans Held for Sale Certain 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 of the goodwill below its carrying amount, in accordance with ASC 350-20. During the first quarter of 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 or 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 and nine months ended September 30, 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. For liability to equity award modifications, the aggregate amount of compensation cost recognized is the fair value based measure of the award on the modification date. On the modification date, the Company reclassifies the previously recorded share-based compensation liability to additional paid-in capital. 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 . 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 consists 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 the 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, ASU 2016-13 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 ASU 2016-13 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. 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’s working group that includes individuals from various functional areas continues to make progress in accordance with the implementation plan for adoption of the standard. For loans held for investment, early implementation activities focused on data capture and portfolio segmentation, which were substantially completed during the third quarter of 2019. The Company has developed new expected credit loss estimation models. Depending on the nature of each identified segment of financial assets with similar risk characteristics, the Company currently plans on implementing a discounted cash flow method or a loss-rate method to estimate expected credit losses on non-purchased credit deteriorated loans. The Company also plans to use peer historical loss data to supplement its own limited historical loss data. Incorporating reasonable and supportable forecasts of economic conditions into the estimate of expected credit losses will require significant judgment, such as selecting economic variables and forecast scenarios as well as determining the appropriate length of the forecast horizon. Management will estimate credit losses over a selected forecast period and revert to long term historical loss experience over the remaining contractual life of the loans. Management will select economic variables it believes to be most relevant based on the correlation of an economic factor to losses of each loan segment, which will likely include forecasted levels of employment, pricing indexes, and gross domestic product. Management currently intends to leverage economic projections from a reputable and independent third party to develop its reasonable and supportable forecasts over the forecast period. Other internal and external indicators of economic forecasts will also be considered by management when developing the forecast metrics. The Company is still finalizing the final loss model to be utilized for purchase credit deteriorated loans and held-to-maturity debt securities. Additionally, the Company’s primary expected loss model is being validated during the fourth quarter of 2019. The ultimate impact of ASU 2016-13 will depend on the composition of the portfolio and economic conditions and forecasts at the time of adoption. It could also be subject to further regulatory or accounting guidance and other management validation and judgments. Based on our loan portfolio at September 30, 2019 and management’s current expectation of future economic conditions, the allowance for credit losses as a percentage of total loans is expected to increase from 0.45% to between 1.15% and 1.35% as of the date of adoption. This estimated impact includes additional provision required on recently acquired loans that have not required a provision under the incurred loss model and the impact of transitioning of loans previously accounted for under subtopic ASC 310-30 to the purchased credit deteriorated model in ASC 326. The transition to the purchased credit deteriorated model will result in adding our estimate of expected credit losses on such loans to both a) the amortized cost basis of those assets and b) the allowance for credit losses. We do not expect a material impact on the net carrying amount of these assets as a result of the transition. Additionally, this estimated impact at adoption also includes certain qualitative adjustments to the allowance for credit losses. The Company is still assessing the estimated impact to the allowance for credit losses as it relates to the Company’s held-to-maturity debt securities, but the Company does not expect a material impact to the allowance. The Company is currently running parallel computations in 2019 and continues to evaluate the final impact of adoption of this ASU.

Supplemental Statement of Cash

Supplemental Statement of Cash Flows	9 Months Ended
	Sep. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Supplemental Statement of Cash Flows	Supplemental Statement of Cash Flows Other supplemental cash flow information is presented below: Nine Months Ended September 30, 2019 2018 Supplemental Disclosures of Cash Flow Information: Cash paid for interest $ 65,897 $ 19,939 Cash paid for income taxes 13,400 6,025 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 842 788 — Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital (48 ) — Net foreclosure of other real estate owned and repossessed assets 4,625 8 Reclassification of branch assets held for sale to loans held for investment 26,171 — Reclassification of branch liabilities held for sale to interest-bearing transaction and savings deposits 1,173 — Non-cash assets acquired in business combination Investment securities $ 660,792 $ — Non-marketable equity securities 40,287 — Loans held for sale 9,360 — Loans held for investment 3,245,248 (4,050 ) Accrued interest receivable 11,395 — Bank-owned life insurance 56,841 — Bank premises, furniture and equipment 36,855 1,162 Investment in unconsolidated subsidiaries 666 — Intangible assets, net 65,718 (956 ) Goodwill 209,016 1,995 Other assets 12,649 1,806 Right of use asset 9,373 — Deferred taxes 11,930 — Current taxes 1,812 — Assets held for sale 85,307 — Total assets $ 4,457,249 $ (43 ) Non-cash liabilities assumed in business combination 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 26,261 — Lease liability 9,373 — Accrued interest payable and other liabilities 5,181 (260 ) 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 $ 3,926,060 $ 43

Share Transactions

Share Transactions	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Share Transactions	Share Transactions On January 28, 2019, the Company's Board of Directors (the “Board”) originally authorized a stock buyback program (the "Stock Buyback Program") pursuant to which the Company could, from time to time, purchase up to $50,000 of its outstanding common stock in the aggregate. On September 3, 2019, the Board authorized an increase of $50,000 in the dollar amount authorized for repurchase, resulting in an aggregate authorization to purchase up to $100,000 under the Stock Buyback Program. The Board also authorized an extension of the original expiration date of the Stock Buyback Program from December 31, 2019 to August 31, 2020. 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 Board at any time prior to its expiration. During the three and nine months ended September 30, 2019 , 1,177,241 and 2,349,103 shares were repurchased through the Stock Buyback Program and held as treasury stock at an average price of $24.61 and $25.03 , respectively.

Debt Securities

Debt Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Debt Securities	Debt Securities Debt securities have been classified in the condensed consolidated balance sheets according to management’s intent. The amortized cost, related gross unrealized gains and losses, and the fair value of available for sale and held to maturity securities are as follows: September 30, 2019 Amortized Gross Gross Fair Value Available for sale Corporate bonds $ 77,005 $ 1,909 $ 90 $ 78,824 Municipal securities 75,112 3,982 — 79,094 Mortgage-backed securities 338,144 10,175 59 348,260 Collateralized mortgage obligations 398,665 9,135 253 407,547 Small Business Administration ("SBA") guaranteed securities 73,751 2,798 — 76,549 $ 962,677 $ 27,999 $ 402 $ 990,274 Held to maturity Mortgage-backed securities $ 10,540 $ 661 $ — $ 11,201 Municipal securities 22,579 1,397 — 23,976 $ 33,119 $ 2,058 $ — $ 35,177 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 minimal. No gain or loss was recorded at the time of the transfer. December 31, 2018 Amortized Gross Gross 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: September 30, 2019 Less Than 12 Months 12 Months or More Totals Fair Unrealized Fair Unrealized Fair Unrealized Available for sale Corporate bonds $ 5,591 $ 83 $ 3,786 $ 7 $ 9,377 $ 90 Mortgage-backed securities 1,860 7 5,615 52 7,475 59 Collateralized mortgage obligations 22,395 253 — — 22,395 253 $ 29,846 $ 343 $ 9,401 $ 59 $ 39,247 $ 402 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 10 and 142 at September 30, 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 September 30, 2019 compared to the rates 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 Company from time to time may dispose of an impaired security in response to asset/liability management decisions, future market movements or business plan changes, or if the net proceeds can be reinvested at a rate of return that is expected to recover the loss within a reasonable period of time. In 2019, the Company sold 142 fixed maturity securities from its available for sale portfolio as part of a repositioning strategy recommended by the Company’s asset manager. 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 prepayment 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 terms of mortgage-backed securities, collateralized mortgage obligations and asset-backed securities thus approximates the terms of the underlying mortgages and loans and can vary significantly due to prepayments. Therefore, these securities are not included in the maturity categories below. . September 30, 2019 Available for Sale Held to Maturity Amortized Fair Amortized Fair Due in one year or less $ — $ — $ — $ — Due from one year to five years 4,897 5,090 — — Due from five years to ten years 68,614 70,271 1,209 1,225 Due after ten years 78,606 82,557 21,370 22,751 152,117 157,918 22,579 23,976 Mortgage-backed securities and collateralized mortgage obligations 736,809 755,807 10,540 11,201 SBA guaranteed securities 73,751 76,549 — — $ 962,677 $ 990,274 $ 33,119 $ 35,177 December 31, 2018 Available for Sale Amortized Fair 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 nine months ended September 30, 2019 and 2018 were as follows: Nine Months Ended September 30, 2019 2018 Proceeds from sales $ 254,397 $ 30,961 Gross realized gains 522 335 Gross realized losses 1,936 357 There was a blanket floating lien on all securities held by the Company to secure Federal Home Loan Bank (“FHLB”) advances as of September 30, 2019 and December 31, 2018 .

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses Loans held for investment in the accompanying condensed consolidated balance sheets are summarized as follows: September 30, December 31, Loans held for investment: Real estate: Construction and land $ 614,974 $ 324,863 Farmland 16,633 10,528 1 - 4 family residential 559,310 297,917 Multi-family residential 306,965 51,285 Commercial real estate 2,426,641 1,103,032 Commercial 1,711,256 760,772 Mortgage warehouse 233,577 — Consumer 18,114 7,112 5,887,470 2,555,509 Deferred loan fees 134 (15 ) Allowance for loan losses (26,243 ) (19,255 ) Total loans held for investment $ 5,861,361 $ 2,536,239 Included in the net loan portfolio as of September 30, 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 $61,744 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 September 30, 2019 and December 31, 2018 is a discount on retained loans from sale of originated SBA loans of $2,871 and $2,398 , respectively. The majority of the Company’s loan portfolio consists of loans to businesses and individuals in the Dallas-Fort Worth metroplex and the Houston metropolitan area. This geographic concentration subjects the loan portfolio to the general economic conditions within these areas. The risks created by this concentration have been considered by management in the determination of the adequacy of the allowance for loan losses. Management believes the allowance for loan losses was adequate to cover estimated losses on loans as of September 30, 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 September 30, 2019 and December 31, 2018 , were as follows: Non-Accrual Loans September 30, December 31, Real estate: Construction and land $ 1,850 $ 2,399 Farmland — — 1 - 4 family residential 1,188 — Multi-family residential — — Commercial real estate 2,859 2,575 Commercial 4,190 19,769 Mortgage warehouse — — Consumer 85 2 Total $ 10,172 $ 24,745 At December 31, 2018 , non-accrual loans included PCI loans of $16,902 for which discount accretion has been suspended because the extent and timing of cash flows from these PCI loans can no longer be reasonably estimated. There were no PCI loans included in non-accrual loans at September 30, 2019 . During the three and nine months ended September 30, 2019 , interest income not recognized on non-accrual loans, excluding PCI loans, was $243 and $530 , respectively. During the three and nine months ended September 30, 2018 , interest income not recognized on non-accrual loans, excluding PCI loans, was $331 and $371 , respectively. An age analysis of past due loans, aggregated by class of loans, as of September 30, 2019 and December 31, 2018 , is as follows: September 30, 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 (1) Real estate: Construction and land $ 850 $ — $ 1,896 $ 2,746 $ 607,821 $ 4,407 $ 614,974 $ 47 Farmland — — — — 16,633 — 16,633 — 1 - 4 family residential 138 3,168 1,156 4,462 550,236 4,612 559,310 482 Multi-family residential — — — — 306,965 — 306,965 — Commercial real estate 4,927 23,165 1,078 29,170 2,300,288 97,183 2,426,641 398 Commercial 3,851 435 3,838 8,124 1,660,994 42,138 1,711,256 1,129 Mortgage warehouse — — — — 233,577 — 233,577 — Consumer 176 39 223 438 17,540 136 18,114 138 Total $ 9,942 $ 26,807 $ 8,191 $ 44,940 $ 5,694,054 $ 148,476 $ 5,887,470 $ 2,194 (1) Loans 90 days past due and still accruing excludes $30,294 of PCI loans as of September 30, 2019 . 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 — Total $ 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 $2,194 as of September 30, 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 for which it is probable the Company will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. All troubled debt restructurings (“TDRs”) are considered impaired loans. Impaired loans are measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent. Substantially all of the Company’s impaired loans are measured at the fair value of the collateral. Impaired loans, or portions thereof, are charged off when deemed uncollectible. Impaired loans and TDRs at September 30, 2019 and December 31, 2018 are summarized in the following tables. September 30, 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 $ 1,850 $ 184 $ 1,666 $ 1,850 $ 166 $ 1,989 Farmland — — — — — — 1 - 4 family residential 157 157 — 157 — 158 Multi-family residential — — — — — — Commercial real estate 2,983 2,983 — 2,983 — 3,210 Commercial 4,190 285 3,905 4,190 1,418 4,352 Consumer 59 59 — 59 — 60 Total $ 9,239 $ 3,668 $ 5,571 $ 9,239 $ 1,584 $ 9,769 (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 $1,132 and $1,171 as of September 30, 2019 and December 31, 2018 , respectively. There were no new TDRs during the nine months ended September 30, 2019 . During the nine months ended September 30, 2018 certain loans were modified as TDRs, the terms of which are summarized in the following table. Nine months ended September 30, 2018 Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Adjusted Interest Rate Extended Maturity Extended Maturity and Restructured Payments Extended Maturity, Restructured Payments and Adjusted Interest Rate Commercial 3 628 — 612 — — Total 3 $ 628 $ — $ 612 $ — $ — There were no loans modified as TDR loans within the previous 12 months and for which there was a payment default during the three and nine months ended September 30, 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 and nine months ended September 30, 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 September 30, 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 September 30, 2019 and December 31, 2018 : September 30, 2019 Pass Special Substandard Doubtful PCI Total Real estate: Construction and land $ 605,062 $ 2,320 $ 3,185 $ — $ 4,407 $ 614,974 Farmland 16,633 — — — — 16,633 1 - 4 family residential 551,288 1,432 1,978 — 4,612 559,310 Multi-family residential 306,965 — — — — 306,965 Commercial real estate 2,259,962 39,963 29,533 — 97,183 2,426,641 Commercial 1,601,549 51,479 16,090 — 42,138 1,711,256 Mortgage warehouse 233,577 — — — — 233,577 Consumer 17,725 37 216 — 136 18,114 Total $ 5,592,761 $ 95,231 $ 51,002 $ — $ 148,476 $ 5,887,470 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 nine months ended September 30, 2019 and 2018 and the year ended December 31, 2018 is as follows: Nine Months Ended September 30, 2019 Year Ended December 31, 2018 Nine Months Ended September 30, 2018 Balance at beginning of period $ 19,255 $ 12,808 $ 12,808 Provision charged to earnings 18,021 6,603 5,239 Charge-offs (11,272 ) (197 ) (171 ) Recoveries 239 41 33 Net charge-offs (11,033 ) (156 ) (138 ) Balance at end of period $ 26,243 $ 19,255 $ 17,909 The allowance for loan losses as a percentage of total loans was 0.45% , 0.75% and 0.73% as of September 30, 2019 , December 31, 2018 and September 30, 2018 , respectively. The following tables summarize the activity in the allowance for loan losses by portfolio segment for the periods indicated. Nine Months Ended September 30, 2019 Real Estate Construction, 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 1,359 910 2,025 13,491 236 18,021 Charge-offs — (157 ) — (10,898 ) (217 ) (11,272 ) Recoveries — 62 — 91 86 239 Net charge-offs — (95 ) — (10,807 ) (131 ) (11,033 ) Balance at end of period $ 3,603 $ 2,790 $ 8,488 $ 11,238 $ 124 $ 26,243 Period-end amount allocated to: Specific reserves 166 — — 1,418 — 1,584 PCI reserves — — — 421 — 421 General reserves 3,437 2,790 8,488 9,399 124 24,238 Total $ 3,603 $ 2,790 $ 8,488 $ 11,238 $ 124 $ 26,243 For the Year Ended December 31, 2018 Real Estate Construction, 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 Nine Months Ended September 30, 2018 Real Estate Construction, 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 552 324 1,726 2,633 4 5,239 Charge-offs — — — (150 ) (21 ) (171 ) Recoveries — — — 33 — 33 Net charge-offs (recoveries) — — — (117 ) (21 ) (138 ) Balance at end of period $ 1,867 $ 1,797 $ 6,136 $ 8,104 $ 5 $ 17,909 Period-end amount allocated to: Specific reserves — — — 378 — 378 PCI reserves — — — 1,302 — 1,302 General reserves 1,867 1,797 6,136 6,424 5 16,229 Total $ 1,867 $ 1,797 $ 6,136 $ 8,104 $ 5 $ 17,909 The Company’s recorded investment in loans as of September 30, 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: September 30, 2019 Real Estate Construction, Residential Commercial Real Estate Commercial Consumer Total Loans individually evaluated for impairment $ 1,850 $ 157 $ 2,983 $ 4,190 $ 59 $ 9,239 Loans collectively evaluated for impairment 625,350 861,506 2,326,475 1,898,505 17,919 5,729,755 PCI loans 4,407 4,612 97,183 42,138 136 148,476 Total $ 631,607 $ 866,275 $ 2,426,641 $ 1,944,833 $ 18,114 $ 5,887,470 December 31, 2018 Real Estate Construction, 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 September 30, 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. September 30, 2019 December 31, 2018 Carrying amount $ 148,055 $ 39,528 Outstanding balance 185,787 49,902 Changes in the accretable yield for PCI loans for the three and nine months ended September 30, 2019 and 2018 are included in table below. Three Months Ended Nine Months Ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Balance at beginning of period $ 33,709 $ 7,335 $ 18,747 $ 2,723 Additions — — 18,073 1,459 Reclassifications (to) from nonaccretable 9,309 278 11,195 6,499 Accretion (4,149 ) (820 ) (9,146 ) (3,888 ) Balance at end of period $ 38,762 $ 6,793 $ 38,762 $ 6,793 During the three and nine months ended September 30, 2019 , the Company received cash collections in excess of expected cash flows on PCI loans accounted for individually and not aggregated into loan pools of $28 and $441 , respectively. During the three and nine months ended September 30, 2018 , the Company received cash collections in excess of expected cash flows on PCI loans accounted for individually and not aggregated into loan pools of $1,999 and $3,759 , respectively. Servicing Assets The Company was servicing loans of approximately $241,733 and $71,609 as of September 30, 2019 and 2018 , respectively. A summary of the changes in the related servicing assets are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ 3,793 $ 1,183 $ 1,304 $ 1,215 Servicing asset acquired through acquisition — — 2,382 — Increase from loan sales 534 27 995 204 Servicing asset impairment (188 ) — (188 ) — Amortization charged to income (618 ) (69 ) (972 ) (278 ) Balance at end of period $ 3,521 $ 1,141 $ 3,521 $ 1,141 The estimated fair value of the servicing assets approximated the carrying amount at September 30, 2019 , December 31, 2018 and September 30, 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. The Company may also receive a portion of subsequent interest collections on loans sold that exceed the contractual servicing fees. In that case, the Company records an interest-only strip based on its relative fair market value and the other components of the loans. There was no interest-only strip receivable recorded at September 30, 2019 and December 31, 2018 .

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value	Fair Value The following table summarizes assets measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: September 30, 2019 Level 1 Level 2 Level 3 Total Financial Assets: Available for sale securities $ — $ 990,274 $ — $ 990,274 Loans held for sale (1) — 8,468 — 8,468 Correspondent interest rate swaps — 7 — 7 Customer interest rate swaps — 5,437 — 5,437 Correspondent interest rate caps and collars — 20 — 20 Commercial loan interest rate floor — 4,225 — 4,225 Financial Liabilities: Correspondent interest rate swaps — 5,909 — 5,909 Customer interest rate caps and collars — 20 — 20 (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 nine months ended September 30, 2019 and 2018 . The following table summarizes assets measured at fair value on a non-recurring basis as of September 30, 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 Level 1 Level 2 Level 3 Total As of September 30, 2019 Assets: Impaired loans $ — $ — $ 5,571 $ 5,571 Other real estate owned — — 4,625 4,625 As of December 31, 2018 Assets: Impaired loans — — 2,584 2,584 At September 30, 2019 , impaired loans with an allowance had a recorded investment of $5,571 , with $1,584 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 two properties recorded with a fair value of approximately $4,625 at September 30, 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 September 30, 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 Annual Report on Form 10-K for the year ended December 31, 2018 , with the exception of securities sold under agreements to repurchase. Please refer to Note 16 in the Company’s 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 September 30, 2019 and December 31, 2018 were as follows: Fair Value Carrying Level 1 Level 2 Level 3 September 30, 2019 Financial assets: Cash and cash equivalents $ 252,592 $ — $ 252,592 $ — Held to maturity investments 33,119 — 35,177 — Loans held for sale 10,715 — 10,715 — Loans held for investment, mortgage warehouse 233,577 — — 237,945 Loans held for investment 5,654,027 — — 5,681,565 Accrued interest receivable 19,893 — 19,893 — Bank-owned life insurance 80,411 — 80,411 — Servicing asset 3,521 — 3,521 — Other investments 89,795 — 89,795 — Financial liabilities: Deposits $ 5,877,846 $ — $ 5,772,171 $ — Advances from FHLB 752,907 — 778,243 — Accrued interest payable 7,355 — 7,355 — Subordinated debentures and subordinated notes 72,284 — 72,284 — Securities sold under agreement to repurchase 2,787 — 2,787 — 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 Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company primarily uses derivatives to manage exposure to market risk, including interest rate risk and credit risk and to assist customers with their risk management objectives. Management will designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship. The Company’s remaining derivatives consist of derivatives held for customer accommodation or other purposes. The fair value of derivative positions outstanding is included in “other assets” and “accounts payable and accrued expenses” on the accompanying condensed consolidated balance sheets and in the net change in each of these financial statement line items in the accompanying condensed consolidated statements of cash flows. For derivatives not designated as hedging instruments, gains and losses due to changes in fair value are included in noninterest income and the operating section of the consolidated statement of cash flows. For derivatives designated as hedging instruments, the entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The notional amounts and estimated fair values as of September 30, 2019 were as shown in the table below. The Company did not have hedging or non-hedging derivative instruments as of December 31, 2018 . September 30, 2019 Estimated Fair Value Notional Amount Asset Derivative Liability Derivative Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate floor $ 275,000 $ 4,225 $ — Total derivatives designated as hedging instruments 275,000 4,225 — Derivatives not designated as hedging instruments: Financial institution counterparty: Interest rate swaps 227,438 7 5,909 Interest rate caps and collars 84,211 20 — Commercial customer counterparty: Interest rate swaps 227,438 5,437 — Interest rate caps and collars 84,211 — 20 Total derivatives not designated as hedging instruments 623,298 5,464 5,929 Offsetting derivative assets/liabilities 28 28 Total derivatives $ 898,298 $ 9,717 $ 5,957 Pre-tax gain (loss) included in the condensed consolidated statements of income and related to derivative instruments for the three and nine months ended September 30, 2019 was as follows: For the Three Months Ended For the Nine Months Ended Gain recognized in other comprehensive income on cash flow derivative Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing) Loss recognized in noninterest income Gain recognized in other comprehensive income on cash flow derivative Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing) Gain recognized in noninterest income Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate floors $ 413 $ (334 ) $ — $ 2,033 $ (473 ) $ — Derivatives not designated as hedging instruments: Interest rate swaps, caps and collars $ — $ — $ 604 $ — $ — $ 474 Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps, floors, caps and collars to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans (one-month LIBOR). In May 2019, the Company entered into a $275,000 notional interest rate floor with a two-year term. The interest rate floor has a purchased floor strike of 2.43% . The purchased option price was $2,665 , which is reflected within “accrued interest receivable and other assets“ in the condensed consolidated statements of cash flows. Interest Rate Swap, Floor, Cap and Collar Agreements Not Designated as Hedging Derivatives 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 the Company’s 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 September 30, 2019 . The Company did not have interest rate swaps outstanding as of December 31, 2018 . September 30, 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 $ 227,438 2.944 - 8.470% LIBOR 1 month + 0% - 5.00% Wtd. Avg. $ (5,902 ) Interest rate caps and collars $ 84,211 2.500% / 5.800% LIBOR 1 month + 0% - 3.75% Wtd. Avg. $ 20 Correspondent interest rate derivatives: Interest rate swaps - pay fixed/receive floating $ 227,438 2.944 - 8.470% LIBOR 1 month + 0% - 5.00% Wtd. Avg. $ 5,439 Interest rate caps and collars $ 84,211 3.000% / 5.800% LIBOR 1 month + 0% - 3.75% Wtd. Avg. $ (20 )

Financial Instruments with Off-

Financial Instruments with Off-Balance Sheet Risk	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Financial Instruments with Off-Balance Sheet Risk	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 September 30, 2019 and December 31, 2018 : September 30, December 31, 2019 2018 Commitments to extend credit $ 1,909,221 $ 962,436 Standby and commercial letters of credit 33,360 5,431 Total $ 1,942,581 $ 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 substantially 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

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	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 generally ranging from one 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 September 30, 2019 , operating lease ROU assets and liabilities were $15,278 and $16,125 , respectively. The table below summarizes the Company’s net lease cost: Three Months Ended Nine Months Ended Operating lease cost $ 1,157 $ 3,920 Variable lease cost 293 700 Net lease cost $ 1,450 $ 4,620 The table below summarized other information related to the Company’s operating leases: Nine Months Ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,399 Weighted average remaining lease term - operating leases, in years 3.9 years 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: September 30, 2019 Lease payments due: Within one year $ 3,908 After one but within two years 3,390 After two but within three years 2,819 After three but within four years 2,586 After four but within five years 1,938 After five years 2,549 Total undiscounted cash flows 17,190 Less: Discount on cash flows (1,065 ) Total lease liability $ 16,125 There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the nine months ended September 30, 2019 . As of September 30, 2019 , the Company did not have additional operating leases for office space that were anticipated to commence during the fourth quarter of 2019.

Intangible Assets and Goodwill

Intangible Assets and Goodwill	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill Intangible assets in the accompanying condensed consolidated balance sheets are summarized as follows: As of September 30, 2019 Weighted Gross Net Amortization Intangible Accumulated Intangible Period Assets Impairment Amortization Assets Core deposit intangibles 7.2 years $ 81,769 $ — $ 11,755 $ 70,014 Servicing asset 7.1 years 5,468 188 1,759 3,521 Intangible lease assets 1.7 years 4,764 — 2,936 — 1,828 $ 92,001 $ 188 $ 16,450 $ 75,363 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 nine months ended September 30, 2019 and September 30, 2018 , amortization expense related to intangible assets of approximately $8,922 and $3,087 , respectively, was included within amortization of intangibles 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 September 30, 2019 : September 30, 2019 Balance as of December 31, 2018 $ 161,447 Effect of Green acquisition 209,016 Balance as of September 30, 2019 $ 370,463

Deposits

Deposits	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Deposits	Deposits Deposits in the accompanying condensed consolidated balance sheets are summarized as follows: September 30, 2019 December 31, 2018 Noninterest-bearing demand accounts $ 1,473,126 $ 626,283 Interest-bearing demand accounts 373,997 146,969 Savings accounts 87,981 33,147 Limited access money market accounts 2,066,315 1,133,045 Certificates of deposit, greater than $100 1,212,718 392,935 Certificates of deposit, less than $100 663,709 290,049 Total $ 5,877,846 $ 2,622,428 As of September 30, 2019 , the scheduled maturities of certificates of deposit were as follows: Year Amount 2019 $ 519,916 2020 1,092,676 2021 198,091 2022 38,773 2023 26,971 Total $ 1,876,427 The aggregate amount of demand deposit overdrafts that have been reclassified as loans were $168 and $153 as of September 30, 2019 and December 31, 2018 , respectively. Brokered deposits at September 30, 2019 and December 31, 2018 totaled approximately $416,125 and $234,190 , respectively.

Advances from the Federal Home

Advances from the Federal Home Loan Bank	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Advances from the Federal Home Loan Bank	Advances from the Federal Home Loan Bank Advances from the FHLB totaled $752,907 and $28,019 at September 30, 2019 and December 31, 2018 , respectively. As of September 30, 2019 , the advances were collateralized by a blanket floating lien on certain securities and loans, had a weighted average rate of 1.51% and scheduled to mature on various dates from 2019 to 2034. The Company had the availability to borrow additional funds of approximately $822,980 as of September 30, 2019 . Contractual maturities of FHLB advances at September 30, 2019 were as follows: 2019 $ 225,000 2020 425,000 2021 75,000 2022 27,907 Total $ 752,907

Subordinated Debentures and Sub

Subordinated Debentures and Subordinated Notes	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Subordinated Debentures and Subordinated Notes	Subordinated Debentures and Subordinated Notes Subordinated Notes Total subordinated notes as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Subordinated notes $ 40,000 $ 5,000 Unamortized debt premium (discount) 2,315 (11 ) Total subordinated notes $ 42,315 $ 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 Total subordinated debentures as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Subordinated debentures $ 33,868 $ 11,702 Debt discount (3,899 ) — Total subordinated debentures $ 29,969 $ 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 September 30, 2019 was 2.1% . 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 September 30, 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-Class

Stock-Based and Liability-Classified Awards	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-Based and Liability-Classified Awards	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. The Company recognized no stock compensation expense related to the 2010 Incentive Plan three months ended September 30, 2019 . The Company recognized stock compensation expense related to the 2010 Incentive Plan of $2 for the nine months ended September 30, 2019 . The Company recognized stock compensation expense related to the 2010 Incentive Plan of $11 and $21 , respectively, for the three and nine months ended September 30, 2018 . A summary of option activity under the 2010 Incentive Plan for the nine months ended September 30, 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 (11,500 ) 10.48 Outstanding at September 30, 2018 293,500 $ 10.15 2.78 years Options exercisable at September 30, 2018 289,500 $ 10.13 2.75 years Outstanding at January 1, 2019 275,000 $ 10.12 2.39 years $ 3,098 Exercised (17,500 ) 10.24 Outstanding and exercisable at September 30, 2019 257,500 $ 10.28 1.62 years $ 3,699 As of September 30, 2019 , there was no unrecognized stock compensation expense related to non-performance based stock options. As of December 31, 2018 and September 30, 2018 , there was approximately $2 and $4 , 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 September 30, 2019 . A summary of the status of the Company’s restricted stock units under the 2010 Incentive Plan as of September 30, 2018 , and changes during the nine months then ended is as follows: 2010 Incentive Plan Nonperformance-based restricted stock units Units Weighted Average Grant Date Fair Value Outstanding at January 1, 2018 24,250 $ 13.19 Vested into shares (23,750 ) 12.14 Forfeited (500 ) 10.85 Outstanding at September 30, 2018 — $ — As of September 30, 2019 and December 31, 2018 , there was no remaining unrecognized compensation expense related to non-vested restricted stock units. As of September 30, 2018 , there was $4 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 for the nine months ended September 30, 2019 and 2018 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 2018 Non-performance based stock options exercised 454 328 Non-performance based restricted stock units vested — 713 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 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 and nine months ended September 30, 2019 . The accelerated vesting of awards on January 1, 2019 resulted in the immediate recognition of $5,535 of stock compensation expense for the nine months ended September 30, 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 acquisition 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 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 nine months ended September 30, 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 and performance-based restricted stock units granted under the 2014 Omnibus Plan in January 2019 had terms requiring cash settlement of the awards unless and until the awards were approved by the shareholders of the Company. At the Company’s 2019 annual meeting of shareholders, the Company 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 rather than in cash (the “Shareholder Approval”). Other terms amended in the 2014 Omnibus Plan included allowing the Compensation Committee to delegate to any of the Company’s officers certain limited authority to grant awards under the 2014 Omnibus Plan except to himself or herself. The Compensation Committee of the Board approved the amendment and restatement of the 2014 Omnibus Plan in April 2019, and the Shareholder Approval was received in May 2019. Pursuant to the 2014 Omnibus Plan amendments, the Compensation Committee also delegated to the Chief Executive Officer of the Company the authority to grant time-based restricted stock unit awards or time-based stock option awards representing up to an aggregate 100,000 shares, which are to be ratified by the Compensation Committee after the grant date. The Chief Executive Officer may not grant to any single individual (a) time-based stock option awards to any representing an aggregate of more than 10,000 shares or (b) time-based restricted stock unit awards representing an aggregate of more than 15,000 shares. Awards granted pursuant to this delegation of authority may have vesting periods of up to 5 years , as determined by the Chief Executive Officer. Given the requirement to settle the 2019 equity awards in cash until Shareholder Approval was obtained, the Company accounted for these awards as liability-classified awards and measured them at fair value through the date of Shareholder Approval. On the date of Shareholder Approval, known as the modification date, the Company reclassified the liability-classified awards to equity awards at fair value. 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 on the date of Shareholder Approval, when the awards were reclassified from liability to equity awards. 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 nine months ended September 30, 2019 and 2018 : Nine Months Ended September 30, 2019 2019 2018 Dividend yield 1.87% to 2.01% 0.00% Expected life 5.0 to 7.51 years 5.0 to 7.5 years Expected volatility 29.13% to 29.65% 27.87% to 37.55% Risk-free interest rate 1.72% to 2.51% 1.06% to 2.94% 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, in January 2019 the Company granted certain non-performance based stock options and tandem stock appreciation rights ("SARs"). The terms of the SARs provided that the SARs would become effective only if the Board and/or the shareholders of the Company failed to approve the issuance of shares with respect to the corresponding non-performance based stock options. In May 2019, the non-performance based stock options were approved by an affirmative vote of the Board and by shareholders at the Company's 2019 annual meeting of shareholders, at which time the SARs automatically became null and void in accordance with their terms. The corresponding non-performance based stock options will become exercisable in accordance with the vesting schedules set forth in each award agreement, which range between three and five years. Stock Compensation Expense and Liability Award Compensation Expense Stock compensation expense for non-vested equity awards as of September 30, 2019 under the 2014 Omnibus Plan was approximately $1,054 and $1,691 for the three and nine months ended September 30, 2019 . The Company also incurred accelerated stock compensation expense of $5,533 for awards granted under the 2014 Omnibus Plan before January 1, 2019 and $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 during the nine months ended September 30, 2019 . For the three and nine months ended September 30, 2018 , the Company recognized $928 and $3,054 in stock compensation expense. Stock compensation expense for options and restricted stock unit awards granted under the Veritex (Green) 2014 Plan was approximately $376 and $1,147 for the three and nine months ended September 30, 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. There was no compensation expense for liability-classified awards under the 2014 Omnibus Plan during the three months ended September 30, 2019 and $1,403 for the nine months ended September 30, 2019 . As noted above, in May 2019, following the Shareholder Approval, certain awards were modified and the classification of the awards was modified from liability to equity, resulting in a reclassification of $1,403 to additional paid-in capital in the second quarter of 2019. 2014 Omnibus Plan A summary of the status of the Company’s stock options under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine months then ended, is as follows: 2014 Omnibus Plan Non-performance Based Stock Options Equity Awards Liability Awards Shares Weighted Weighted Aggregate Intrinsic Value Shares Weighted Weighted Aggregate Intrinsic Value Outstanding at January 1, 2018 332,706 $ 22.71 8.86 years — $ — Granted 125,593 27.95 — — Forfeited (2,076 ) 27.59 — — Exercised (1,983 ) 14.95 — — Outstanding at September 30, 2018 454,240 $ 24.12 8.42 years $ — Options exercisable at September 30, 2018 122,329 $ 18.38 7.29 years — $ — Outstanding at January 1, 2019 449,520 $ 24.47 8.24 years — $ — Granted 166,971 23.91 253,633 21.38 Conversion to equity awards 253,633 21.38 (253,633 ) 21.38 Forfeited (28,240 ) 25.82 — — Exercised (12,610 ) 15.42 — — Outstanding at September 30, 2019 829,274 $ 23.50 8.42 years $ 632 — $ — $ — Options exercisable at September 30, 2019 417,183 $ 24.59 7.53 years $ (135 ) — $ — Weighted average fair value of options granted during the period $ 22.38 $ — As of September 30, 2019 , December 31, 2018 and September 30, 2018 , there was $1,296 , $2,103 and $2,330 of total unrecognized compensation expense related to equity options awarded under the 2014 Omnibus Plan, respectively. As of September 30, 2019 , there was no unrecognized compensation expense related to liability options awarded under the 2014 Omnibus Plan. The unrecognized compensation expense at September 30, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.62 years . A summary of the status of the Company’s non-performance-based restricted stock units under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine 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 54,650 29.29 — — Vested into shares (39,311 ) 27.19 — — Forfeited (3,929 ) 26.85 — — Outstanding at September 30, 2018 162,132 $ 23.85 — $ — Outstanding at January 1, 2019 133,455 $ 19.67 — $ — Granted 104,827 23.09 165,739 21.38 Conversion to equity awards 165,739 21.38 (165,739 ) 21.38 Vested into shares (229,031 ) 22.06 — — Outstanding at September 30, 2019 174,990 $ 21.55 — $ — A summary of the status of the Company’s performance based restricted stock units under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine 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 — — Forfeited (898 ) 27.59 — — Outstanding at September 30, 2018 66,342 $ 25.56 — $ — Outstanding at January 1, 2019 63,988 $ 21.28 — $ — Granted 38,360 22.47 32,249 21.38 Conversion to equity award 32,249 21.38 (32,249 ) 21.38 Vested into shares (51,284 ) 25.31 — — Forfeited (17,827 ) 21.38 — — Outstanding at September 30, 2019 65,486 $ 22.73 — $ — As of September 30, 2019 , December 31, 2018 and September 30, 2018 there was $2,484 , $3,430 and $3,928 of total unrecognized compensation related to equity restricted stock units awarded under the 2014 Omnibus Plan, respectively. As of September 30, 2019 , there was no of unrecognized compensation related to liability restricted stock units awarded under the 2014 Omnibus Plan. The unrecognized compensation expense at September 30, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.3 years . A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2014 Omnibus Plan during the nine months ended September 30, 2019 and 2018 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 2018 Non-performance-based stock options exercised 335 54 Non-performance-based restricted stock units vested 5,669 1,173 Performance-based restricted stock units vested 1,089 745 Veritex (Green) 2014 Plan A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of September 30, 2019 , and changes during the nine months then ended, is as follows: Veritex (Green) 2014 Plan Non-performance Based Stock Options Shares Weighted Weighted Aggregate Intrinsic Value Outstanding at January 1, 2019 — $ — Converted in acquisition of Green 304,778 15.41 Granted 211,793 21.38 Forfeited (10,217 ) 12.21 Exercised (82,451 ) 13.43 — Outstanding at September 30, 2019 423,903 $ 18.85 8.01 years $ 2,293 Options exercisable at September 30, 2019 213,427 $ 16.36 6.89 years $ 1,686 Weighted average fair value of options granted during the period $ 24.22 As of September 30, 2019 , there was $1,198 of total unrecognized compensation expense related to options awarded under the Veritex (Green) 2014 Plan. The unrecognized compensation expense at September 30, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.3 years . A summary of the status of the Company’s non-performance based restricted stock units under the Veritex (Green) 2014 Plan as of September 30, 2019 and changes during the nine 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 September 30, 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 September 30, 2019 and changes during the nine 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 Forfeited (508 ) 21.38 Outstanding at September 30, 2019 25,637 $ 21.38 As of September 30, 2019 , there was $2,243 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 2.3 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 during the nine months ended September 30, 2019 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 Non-performance-based stock options exercised $ 2,088 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 nine months ended September 30, 2019 . No stock options or restricted stock units were awarded from these plans during the nine months ended September 30, 2019 . During the nine months ended September 30, 2019 , 100,544 stock options were exercised from the Green 2010 Plan and 11,850 stock options were exercised from the Green 2006 Plan. As of September 30, 2019 , 661,843 exercisable stock options remain outstanding in the Green 2010 Plan and no exercisable stock options remain outstanding in the Green 2006 Plan.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense for the three and nine months ended September 30, 2019 and 2018 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Income tax expense for the period $ 7,595 $ 1,448 $ 16,953 $ 7,309 Effective tax rate 21.7 % 13.9 % 21.6 % 19.8 % 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 new uncertain tax positions as of September 30, 2018 or any new uncertain tax positions as of September 30, 2019 .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 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 September 30, 2019 and December 31, 2018 , the balance of the investment for qualified affordable housing projects was $3,385 and $3,663 , respectively. This balance is reflected in other investments on the condensed consolidated balance sheets. The total unfunded commitment related to the investment in certain qualified housing projects totaled $1,554 and $2,510 as of September 30, 2019 and December 31, 2018 , respectively. The Company expects to fulfill these commitments during the year ended 2034.

Capital Requirements and Restri

Capital Requirements and Restrictions on Retained Earnings	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Capital Requirements and Restrictions on Retained Earnings	Capital Requirements and Restrictions on Retained Earnings The Company, on a consolidated basis, and the Bank are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can lead to the initiation of certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, CET1 and Tier 1 capital (as defined in the regulations) to risk weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of September 30, 2019 and December 31, 2018 that the Company and the Bank met all capital adequacy requirements to which they were subject. As of September 30, 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 below. There are no conditions or events since September 30, 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 September 30, 2019 Total capital (to risk-weighted assets) Company $ 850,136 12.26 % $ 554,738 8.0 % n/a n/a Bank 831,796 12.00 % 554,531 8.0 % $ 693,163 10.0 % Tier 1 capital (to risk-weighted assets) Company 780,700 11.26 % 416,004 6.0 % n/a n/a Bank 804,675 11.61 % 415,853 6.0 % 554,470 8.0 % Common equity tier 1 to risk-weighted assets Company 749,913 10.82 % 311,886 4.5 % n/a n/a Bank 804,675 11.61 % 311,890 4.5 % 450,507 6.5 % Tier 1 capital (to average assets) Company 780,700 10.33 % 302,304 4.0 % n/a n/a Bank 804,675 10.64 % 302,509 4.0 % 378,137 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 $6,713 and $20,312 , or $0.125 per outstanding share on the applicable record date, were paid by the Bank to the Company during the three and nine months ended September 30, 2019 . No dividends were paid by the Bank to the Company during the year ended December 31, 2018 .

Branch Assets and Liabilities H

Branch Assets and Liabilities Held For Sale	9 Months Ended
	Sep. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Branch Assets and Liabilities Held For Sale	Branch Assets and Liabilities Held for Sale Upon the closing of the Green acquisition, 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 Green had agreed to sell certain assets and deposits associated with one branch in the Austin metropolitan market. On May 10, 2019, the Company completed the sale of these assets and liabilities to Keystone, resulting in a cash settlement payment of $7,153 from Keystone and the recognition of a loss on the sale of $474 reported in merger and acquisition expense on the condensed consolidated statements of income for the nine months ended September 30, 2019. The completion of the sale resulted in the Company exiting the Austin metropolitan market. There were no branch assets and liabilities held for sale as of September 30, 2019 or December 31, 2018 .

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Business Combinations	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 $209,016 related to the acquisition was recorded. 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, the Company 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 of Green 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 deferred and current taxes have been recorded for the acquisition while the Company finalizes deferred reconciliation procedures. 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 Measurement Period Adjustments Revised Fair Value Assets Cash and cash equivalents $ 112,720 $ — $ 112,720 Investment securities 661,032 (240 ) 660,792 Other securities 40,287 — 40,287 Loans held for sale 9,360 — 9,360 Loans held for investment 3,245,492 (244 ) 3,245,248 Accrued interest receivable 11,673 (278 ) 11,395 Bank owned life insurance 56,841 — 56,841 Bank premises, furniture and equipment 39,426 (2,571 ) 36,855 Investment in unconsolidated subsidiaries 666 — 666 Intangible assets 65,718 — 65,718 Goodwill 206,821 2,195 209,016 Other assets 12,245 404 12,649 Right of use asset 9,373 — 9,373 Deferred Taxes 11,535 395 11,930 Current taxes 1,799 13 1,812 Branch assets held for sale 85,307 — 85,307 Total assets $ 4,570,295 $ (326 ) $ 4,569,969 Liabilities Non-interest-bearing deposits $ 825,364 $ — $ 825,364 Interest-bearing deposits 1,300,825 — 1,300,825 Certificates and other time deposits 1,346,915 — 1,346,915 Accounts payable and other accrued expenses 26,587 (326 ) 26,261 Lease liability 9,373 — 9,373 Accrued interest payable 5,181 — 5,181 Securities sold under agreements to repurchase 3,226 — 3,226 Advances from Federal Home Loan Bank 300,000 — 300,000 Subordinated debentures and subordinated notes 56,233 — 56,233 Branch liabilities held for sale 52,682 — 52,682 Total liabilities $ 3,926,386 $ (326 ) $ 3,926,060 Acquisition-related Expenses For the three and nine months ended September 30, 2019 , the Company incurred $1,035 and $38,042 of pre-tax merger and acquisition expenses, respectively, related to the Green acquisition. The amounts incurred during the three months ended September 30, 2019 primarily consist of data processing expenses as a result of core system conversion and severance payments related to the acquisition. The amounts incurred during the nine months ended September 30, 2019 primarily consist of stock-based compensation due to the accelerated vesting of outstanding restricted stock units and stock options of $17,082 , severance and retention payments of $9,491 , legal and professional fees of $5,297 and data processing expenses of $1,824 as a result of the core system conversion. The Company incurred $2,692 and $3,104 of acquisition expenses related to the Green acquisition for the three and nine months ended September 30, 2018 , respectively. 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 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 fair value and contractual value of loans acquired from Green on January 1, 2019 : PCI loans Other acquired loans Total Acquired Loans Real Estate $ 132,006 $ 1,783,938 $ 1,915,944 Commercial 50,057 1,099,012 1,149,069 Mortgage warehouse — 166,850 166,850 Consumer 184 13,201 13,385 Total fair value 182,247 3,063,001 3,245,248 Contractual principal balance $ 242,013 $ 3,093,047 $ 3,335,060 The following table presents additional information about PCI loans acquired from Green on January 1, 2019 : PCI Loans Contractually required principal and interest $ 277,773 Non-accretable difference 75,656 Cash flows expected to be collected $ 202,117 Accretable difference 19,870 Fair value of PCI loans $ 182,247 Intangible Assets The acquisition resulted in a 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 liabilities held for sale as of the close date are valued at fair value less cost to sell. The following table discloses the 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 liabilities 1 323 Total liabilities $ 52,682 1 Accrued interest payable and other liabilities includes $90 in expected selling costs. Certificates and other time deposits The Green acquisition resulted in a 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 Green acquisition resulted in a premium on subordinated debt of $3,134 and a 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 supplemental pro forma information for the nine months ended September 30, 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 $ 200,821 Net Income 78,359 Basic earnings per share $ 1.45 Diluted earnings per share 1.42 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 Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 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, 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 unaudited condensed consolidated financial statements include all adjustments of a normal recurring nature necessary for a fair statement of the Company’s condensed consolidated financial position at September 30, 2019 and December 31, 2018 , condensed consolidated results of operations for the three and nine months ended September 30, 2019 and 2018 , condensed consolidated stockholders’ equity for the three and nine months ended September 30, 2019 and 2018 and condensed consolidated cash flows for the nine months ended September 30, 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 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 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 , 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 interest rate and credit risk. Accordingly, all significant operating decisions are based upon an 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 of $102 and $427 for the three and nine months ended September 30, 2018 , respectively, in order to align with industry peers for comparability purposes and (ii) the reclassification of $2,692 and $4,070 from professional and regulatory fees to merger and acquisition expense on the condensed consolidated statements of income for the three and nine months ended September 30, 2018 , respectively.
Earnings Per Share	Earnings Per Share
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, with the remaining yield being recognized prospectively through interest income.
Derivative Financial Instruments	Derivative Financial Instruments The Company has entered into certain derivative instruments pursuant to a customer accommodation program under which the Company enters into an interest rate swap, floor, cap or collar agreement with a commercial customer and an agreement with offsetting terms with a correspondent bank. These derivative instruments are not designated as accounting hedges and the 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. Interest Rate Swap, Floor, Cap and Collar Agreements Designated as Cash Flow Hedges Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. The Company uses interest rate swaps, floors, caps and collars to manage overall cash flow changes related to interest rate risk exposure on benchmark interest rate loans. The entire change in the fair value related to the derivative instrument is recognized as a component of other comprehensive income and subsequently reclassified into interest income when the forecasted transaction affects income. The Company assesses the “effectiveness” of hedging derivatives on the date an arrangement was entered into and on a prospective basis at least quarterly. Hedge “effectiveness” is determined by the extent to which changes in the fair value of a derivative instrument offset changes in the fair value, cash flows or carrying value attributable to the risk being hedged. If the relationship between the change in the fair value of the derivative instrument and the change in the hedged item falls within a range considered to be the industry norm, the hedge is considered “highly effective” and qualifies for hedge accounting. A hedge is “ineffective” if the relationship between the changes falls outside the acceptable range. In that case, hedge accounting is discontinued on a prospective basis. The time value of the option is excluded from the assessment of effectiveness and is recognized in earnings using a straight-line amortization method over the life of the hedge arrangement.
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, For the Company’s accounting policy on loans held-for-sale for which the fair value option is not elected, refer to Note 1 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Gain on Sale of Mortgage Loans Held for Sale
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 SBA Loans	Gain on Sale of Guaranteed Portion of SBA Loans 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, which is recognized in income, is the sum of the cash premium on the guaranteed loan and the fair value of the servicing assets recognized, less the discount recorded on the unguaranteed portion of the loan retained by the Company.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase
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 of the goodwill below its carrying amount, in accordance with ASC 350-20. During the first quarter of 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 or 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 and nine months ended September 30, 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 and the associated liability is recorded in accounts payable and accrued expenses. For liability to equity award modifications, the aggregate amount of compensation cost recognized is the fair value based measure of the award on the modification date. On the modification date, the Company reclassifies the previously recorded share-based compensation liability to additional paid-in capital.
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 . 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 consists 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 the 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, ASU 2016-13 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 ASU 2016-13 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. 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’s working group that includes individuals from various functional areas continues to make progress in accordance with the implementation plan for adoption of the standard. For loans held for investment, early implementation activities focused on data capture and portfolio segmentation, which were substantially completed during the third quarter of 2019. The Company has developed new expected credit loss estimation models. Depending on the nature of each identified segment of financial assets with similar risk characteristics, the Company currently plans on implementing a discounted cash flow method or a loss-rate method to estimate expected credit losses on non-purchased credit deteriorated loans. The Company also plans to use peer historical loss data to supplement its own limited historical loss data. Incorporating reasonable and supportable forecasts of economic conditions into the estimate of expected credit losses will require significant judgment, such as selecting economic variables and forecast scenarios as well as determining the appropriate length of the forecast horizon. Management will estimate credit losses over a selected forecast period and revert to long term historical loss experience over the remaining contractual life of the loans. Management will select economic variables it believes to be most relevant based on the correlation of an economic factor to losses of each loan segment, which will likely include forecasted levels of employment, pricing indexes, and gross domestic product. Management currently intends to leverage economic projections from a reputable and independent third party to develop its reasonable and supportable forecasts over the forecast period. Other internal and external indicators of economic forecasts will also be considered by management when developing the forecast metrics. The Company is still finalizing the final loss model to be utilized for purchase credit deteriorated loans and held-to-maturity debt securities. Additionally, the Company’s primary expected loss model is being validated during the fourth quarter of 2019. The ultimate impact of ASU 2016-13 will depend on the composition of the portfolio and economic conditions and forecasts at the time of adoption. It could also be subject to further regulatory or accounting guidance and other management validation and judgments. Based on our loan portfolio at September 30, 2019 and management’s current expectation of future economic conditions, the allowance for credit losses as a percentage of total loans is expected to increase from 0.45% to between 1.15% and 1.35% as of the date of adoption. This estimated impact includes additional provision required on recently acquired loans that have not required a provision under the incurred loss model and the impact of transitioning of loans previously accounted for under subtopic ASC 310-30 to the purchased credit deteriorated model in ASC 326. The transition to the purchased credit deteriorated model will result in adding our estimate of expected credit losses on such loans to both a) the amortized cost basis of those assets and b) the allowance for credit losses. We do not expect a material impact on the net carrying amount of these assets as a result of the transition. Additionally, this estimated impact at adoption also includes certain qualitative adjustments to the allowance for credit losses. The Company is still assessing the estimated impact to the allowance for credit losses as it relates to the Company’s held-to-maturity debt securities, but the Company does not expect a material impact to the allowance. The Company is currently running parallel computations in 2019 and continues to evaluate the final impact of adoption of this ASU.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 2019 and 2018 : Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands except per share amounts) Earnings (numerator) Net income $ 27,405 $ 8,935 $ 61,688 $ 29,516 Shares (denominator) Weighted average shares outstanding for basic EPS 52,915 24,176 53,721 24,151 Dilutive effect of employee stock-based awards 953 437 912 436 Adjusted weighted average shares outstanding 53,868 24,613 54,633 24,587 EPS: Basic $ 0.52 $ 0.37 $ 1.15 $ 1.22 Diluted $ 0.51 $ 0.36 $ 1.13 $ 1.20

Supplemental Statement of Cas_2

Supplemental Statement of Cash Flows (Tables)	9 Months Ended
	Sep. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Nine Months Ended September 30, 2019 2018 Supplemental Disclosures of Cash Flow Information: Cash paid for interest $ 65,897 $ 19,939 Cash paid for income taxes 13,400 6,025 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 842 788 — Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital (48 ) — Net foreclosure of other real estate owned and repossessed assets 4,625 8 Reclassification of branch assets held for sale to loans held for investment 26,171 — Reclassification of branch liabilities held for sale to interest-bearing transaction and savings deposits 1,173 — Non-cash assets acquired in business combination Investment securities $ 660,792 $ — Non-marketable equity securities 40,287 — Loans held for sale 9,360 — Loans held for investment 3,245,248 (4,050 ) Accrued interest receivable 11,395 — Bank-owned life insurance 56,841 — Bank premises, furniture and equipment 36,855 1,162 Investment in unconsolidated subsidiaries 666 — Intangible assets, net 65,718 (956 ) Goodwill 209,016 1,995 Other assets 12,649 1,806 Right of use asset 9,373 — Deferred taxes 11,930 — Current taxes 1,812 — Assets held for sale 85,307 — Total assets $ 4,457,249 $ (43 ) Non-cash liabilities assumed in business combination 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 26,261 — Lease liability 9,373 — Accrued interest payable and other liabilities 5,181 (260 ) 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 $ 3,926,060 $ 43

Debt Securities (Tables)

Debt Securities (Tables)	9 Months Ended
	Sep. 30, 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, and the fair value of available for sale and held to maturity securities are as follows: September 30, 2019 Amortized Gross Gross Fair Value Available for sale Corporate bonds $ 77,005 $ 1,909 $ 90 $ 78,824 Municipal securities 75,112 3,982 — 79,094 Mortgage-backed securities 338,144 10,175 59 348,260 Collateralized mortgage obligations 398,665 9,135 253 407,547 Small Business Administration ("SBA") guaranteed securities 73,751 2,798 — 76,549 $ 962,677 $ 27,999 $ 402 $ 990,274 Held to maturity Mortgage-backed securities $ 10,540 $ 661 $ — $ 11,201 Municipal securities 22,579 1,397 — 23,976 $ 33,119 $ 2,058 $ — $ 35,177 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 minimal. No gain or loss was recorded at the time of the transfer. December 31, 2018 Amortized Gross Gross 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	The following tables disclose the Company’s investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or more: September 30, 2019 Less Than 12 Months 12 Months or More Totals Fair Unrealized Fair Unrealized Fair Unrealized Available for sale Corporate bonds $ 5,591 $ 83 $ 3,786 $ 7 $ 9,377 $ 90 Mortgage-backed securities 1,860 7 5,615 52 7,475 59 Collateralized mortgage obligations 22,395 253 — — 22,395 253 $ 29,846 $ 343 $ 9,401 $ 59 $ 39,247 $ 402 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	September 30, 2019 Available for Sale Held to Maturity Amortized Fair Amortized Fair Due in one year or less $ — $ — $ — $ — Due from one year to five years 4,897 5,090 — — Due from five years to ten years 68,614 70,271 1,209 1,225 Due after ten years 78,606 82,557 21,370 22,751 152,117 157,918 22,579 23,976 Mortgage-backed securities and collateralized mortgage obligations 736,809 755,807 10,540 11,201 SBA guaranteed securities 73,751 76,549 — — $ 962,677 $ 990,274 $ 33,119 $ 35,177 December 31, 2018 Available for Sale Amortized Fair 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 nine months ended September 30, 2019 and 2018 were as follows: Nine Months Ended September 30, 2019 2018 Proceeds from sales $ 254,397 $ 30,961 Gross realized gains 522 335 Gross realized losses 1,936 357

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Summary of Loans in the Accompanying Consolidated Balance Sheets	The outstanding balance represents the total amount owed, including accrued but unpaid interest, and any amounts previously charged off. September 30, 2019 December 31, 2018 Carrying amount $ 148,055 $ 39,528 Outstanding balance 185,787 49,902 Changes in the accretable yield for PCI loans for the three and nine months ended September 30, 2019 and 2018 are included in table below. Three Months Ended Nine Months Ended September 30, 2019 September 30, 2018 September 30, 2019 September 30, 2018 Balance at beginning of period $ 33,709 $ 7,335 $ 18,747 $ 2,723 Additions — — 18,073 1,459 Reclassifications (to) from nonaccretable 9,309 278 11,195 6,499 Accretion (4,149 ) (820 ) (9,146 ) (3,888 ) Balance at end of period $ 38,762 $ 6,793 $ 38,762 $ 6,793 Loans held for investment in the accompanying condensed consolidated balance sheets are summarized as follows: September 30, December 31, Loans held for investment: Real estate: Construction and land $ 614,974 $ 324,863 Farmland 16,633 10,528 1 - 4 family residential 559,310 297,917 Multi-family residential 306,965 51,285 Commercial real estate 2,426,641 1,103,032 Commercial 1,711,256 760,772 Mortgage warehouse 233,577 — Consumer 18,114 7,112 5,887,470 2,555,509 Deferred loan fees 134 (15 ) Allowance for loan losses (26,243 ) (19,255 ) Total loans held for investment $ 5,861,361 $ 2,536,239
Schedule of Non-Accrual Loans	Non-accrual loans aggregated by class of loans, as of September 30, 2019 and December 31, 2018 , were as follows: Non-Accrual Loans September 30, December 31, Real estate: Construction and land $ 1,850 $ 2,399 Farmland — — 1 - 4 family residential 1,188 — Multi-family residential — — Commercial real estate 2,859 2,575 Commercial 4,190 19,769 Mortgage warehouse — — Consumer 85 2 Total $ 10,172 $ 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 September 30, 2019 and December 31, 2018 , is as follows: September 30, 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 (1) Real estate: Construction and land $ 850 $ — $ 1,896 $ 2,746 $ 607,821 $ 4,407 $ 614,974 $ 47 Farmland — — — — 16,633 — 16,633 — 1 - 4 family residential 138 3,168 1,156 4,462 550,236 4,612 559,310 482 Multi-family residential — — — — 306,965 — 306,965 — Commercial real estate 4,927 23,165 1,078 29,170 2,300,288 97,183 2,426,641 398 Commercial 3,851 435 3,838 8,124 1,660,994 42,138 1,711,256 1,129 Mortgage warehouse — — — — 233,577 — 233,577 — Consumer 176 39 223 438 17,540 136 18,114 138 Total $ 9,942 $ 26,807 $ 8,191 $ 44,940 $ 5,694,054 $ 148,476 $ 5,887,470 $ 2,194 (1) Loans 90 days past due and still accruing excludes $30,294 of PCI loans as of September 30, 2019 . 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 — Total $ 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 September 30, 2019 and December 31, 2018 are summarized in the following tables. September 30, 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 $ 1,850 $ 184 $ 1,666 $ 1,850 $ 166 $ 1,989 Farmland — — — — — — 1 - 4 family residential 157 157 — 157 — 158 Multi-family residential — — — — — — Commercial real estate 2,983 2,983 — 2,983 — 3,210 Commercial 4,190 285 3,905 4,190 1,418 4,352 Consumer 59 59 — 59 — 60 Total $ 9,239 $ 3,668 $ 5,571 $ 9,239 $ 1,584 $ 9,769 (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.
Schedule of Loans Modified as TDRs	During the nine months ended September 30, 2018 certain loans were modified as TDRs, the terms of which are summarized in the following table. Nine months ended September 30, 2018 Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Adjusted Interest Rate Extended Maturity Extended Maturity and Restructured Payments Extended Maturity, Restructured Payments and Adjusted Interest Rate Commercial 3 628 — 612 — — Total 3 $ 628 $ — $ 612 $ — $ —
Summary of Internal Ratings of Loans, Including Purchased Credit Impaired Loans	The following tables summarize the Company’s internal ratings of its loans, including PCI loans, as of September 30, 2019 and December 31, 2018 : September 30, 2019 Pass Special Substandard Doubtful PCI Total Real estate: Construction and land $ 605,062 $ 2,320 $ 3,185 $ — $ 4,407 $ 614,974 Farmland 16,633 — — — — 16,633 1 - 4 family residential 551,288 1,432 1,978 — 4,612 559,310 Multi-family residential 306,965 — — — — 306,965 Commercial real estate 2,259,962 39,963 29,533 — 97,183 2,426,641 Commercial 1,601,549 51,479 16,090 — 42,138 1,711,256 Mortgage warehouse 233,577 — — — — 233,577 Consumer 17,725 37 216 — 136 18,114 Total $ 5,592,761 $ 95,231 $ 51,002 $ — $ 148,476 $ 5,887,470 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 Recorded Investment in Loans Related to the Balance in the Allowance for Loan Losses on the Basis of the Company's Impairment Methodology	The Company’s recorded investment in loans as of September 30, 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: September 30, 2019 Real Estate Construction, Residential Commercial Real Estate Commercial Consumer Total Loans individually evaluated for impairment $ 1,850 $ 157 $ 2,983 $ 4,190 $ 59 $ 9,239 Loans collectively evaluated for impairment 625,350 861,506 2,326,475 1,898,505 17,919 5,729,755 PCI loans 4,407 4,612 97,183 42,138 136 148,476 Total $ 631,607 $ 866,275 $ 2,426,641 $ 1,944,833 $ 18,114 $ 5,887,470 December 31, 2018 Real Estate Construction, 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 An analysis of the allowance for loan losses for the nine months ended September 30, 2019 and 2018 and the year ended December 31, 2018 is as follows: Nine Months Ended September 30, 2019 Year Ended December 31, 2018 Nine Months Ended September 30, 2018 Balance at beginning of period $ 19,255 $ 12,808 $ 12,808 Provision charged to earnings 18,021 6,603 5,239 Charge-offs (11,272 ) (197 ) (171 ) Recoveries 239 41 33 Net charge-offs (11,033 ) (156 ) (138 ) Balance at end of period $ 26,243 $ 19,255 $ 17,909 The following tables summarize the activity in the allowance for loan losses by portfolio segment for the periods indicated. Nine Months Ended September 30, 2019 Real Estate Construction, 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 1,359 910 2,025 13,491 236 18,021 Charge-offs — (157 ) — (10,898 ) (217 ) (11,272 ) Recoveries — 62 — 91 86 239 Net charge-offs — (95 ) — (10,807 ) (131 ) (11,033 ) Balance at end of period $ 3,603 $ 2,790 $ 8,488 $ 11,238 $ 124 $ 26,243 Period-end amount allocated to: Specific reserves 166 — — 1,418 — 1,584 PCI reserves — — — 421 — 421 General reserves 3,437 2,790 8,488 9,399 124 24,238 Total $ 3,603 $ 2,790 $ 8,488 $ 11,238 $ 124 $ 26,243 For the Year Ended December 31, 2018 Real Estate Construction, 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 Nine Months Ended September 30, 2018 Real Estate Construction, 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 552 324 1,726 2,633 4 5,239 Charge-offs — — — (150 ) (21 ) (171 ) Recoveries — — — 33 — 33 Net charge-offs (recoveries) — — — (117 ) (21 ) (138 ) Balance at end of period $ 1,867 $ 1,797 $ 6,136 $ 8,104 $ 5 $ 17,909 Period-end amount allocated to: Specific reserves — — — 378 — 378 PCI reserves — — — 1,302 — 1,302 General reserves 1,867 1,797 6,136 6,424 5 16,229 Total $ 1,867 $ 1,797 $ 6,136 $ 8,104 $ 5 $ 17,909
Schedule of Summary of Changes in Servicing Assets	The Company was servicing loans of approximately $241,733 and $71,609 as of September 30, 2019 and 2018 , respectively. A summary of the changes in the related servicing assets are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ 3,793 $ 1,183 $ 1,304 $ 1,215 Servicing asset acquired through acquisition — — 2,382 — Increase from loan sales 534 27 995 204 Servicing asset impairment (188 ) — (188 ) — Amortization charged to income (618 ) (69 ) (972 ) (278 ) Balance at end of period $ 3,521 $ 1,141 $ 3,521 $ 1,141

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Assets Measured at Fair Value on a Recurring Basis	The following table summarizes assets measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: September 30, 2019 Level 1 Level 2 Level 3 Total Financial Assets: Available for sale securities $ — $ 990,274 $ — $ 990,274 Loans held for sale (1) — 8,468 — 8,468 Correspondent interest rate swaps — 7 — 7 Customer interest rate swaps — 5,437 — 5,437 Correspondent interest rate caps and collars — 20 — 20 Commercial loan interest rate floor — 4,225 — 4,225 Financial Liabilities: Correspondent interest rate swaps — 5,909 — 5,909 Customer interest rate caps and collars — 20 — 20 (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	The following table summarizes assets measured at fair value on a non-recurring basis as of September 30, 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 Level 1 Level 2 Level 3 Total As of September 30, 2019 Assets: Impaired loans $ — $ — $ 5,571 $ 5,571 Other real estate owned — — 4,625 4,625 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 September 30, 2019 and December 31, 2018 were as follows: Fair Value Carrying Level 1 Level 2 Level 3 September 30, 2019 Financial assets: Cash and cash equivalents $ 252,592 $ — $ 252,592 $ — Held to maturity investments 33,119 — 35,177 — Loans held for sale 10,715 — 10,715 — Loans held for investment, mortgage warehouse 233,577 — — 237,945 Loans held for investment 5,654,027 — — 5,681,565 Accrued interest receivable 19,893 — 19,893 — Bank-owned life insurance 80,411 — 80,411 — Servicing asset 3,521 — 3,521 — Other investments 89,795 — 89,795 — Financial liabilities: Deposits $ 5,877,846 $ — $ 5,772,171 $ — Advances from FHLB 752,907 — 778,243 — Accrued interest payable 7,355 — 7,355 — Subordinated debentures and subordinated notes 72,284 — 72,284 — Securities sold under agreement to repurchase 2,787 — 2,787 — 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 Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Balance Sheet	September 30, 2019 Estimated Fair Value Notional Amount Asset Derivative Liability Derivative Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate floor $ 275,000 $ 4,225 $ — Total derivatives designated as hedging instruments 275,000 4,225 — Derivatives not designated as hedging instruments: Financial institution counterparty: Interest rate swaps 227,438 7 5,909 Interest rate caps and collars 84,211 20 — Commercial customer counterparty: Interest rate swaps 227,438 5,437 — Interest rate caps and collars 84,211 — 20 Total derivatives not designated as hedging instruments 623,298 5,464 5,929 Offsetting derivative assets/liabilities 28 28 Total derivatives $ 898,298 $ 9,717 $ 5,957
Derivative Instruments, Gain (Loss)	Pre-tax gain (loss) included in the condensed consolidated statements of income and related to derivative instruments for the three and nine months ended September 30, 2019 was as follows: For the Three Months Ended For the Nine Months Ended Gain recognized in other comprehensive income on cash flow derivative Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing) Loss recognized in noninterest income Gain recognized in other comprehensive income on cash flow derivative Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing) Gain recognized in noninterest income Derivatives designated as hedging instruments (cash flow hedges): Commercial loan interest rate floors $ 413 $ (334 ) $ — $ 2,033 $ (473 ) $ — Derivatives not designated as hedging instruments: Interest rate swaps, caps and collars $ — $ — $ 604 $ — $ — $ 474
Schedule of Derivative Instruments Outstanding	The following is a summary of the interest rate swaps outstanding as of September 30, 2019 . The Company did not have interest rate swaps outstanding as of December 31, 2018 . September 30, 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 $ 227,438 2.944 - 8.470% LIBOR 1 month + 0% - 5.00% Wtd. Avg. $ (5,902 ) Interest rate caps and collars $ 84,211 2.500% / 5.800% LIBOR 1 month + 0% - 3.75% Wtd. Avg. $ 20 Correspondent interest rate derivatives: Interest rate swaps - pay fixed/receive floating $ 227,438 2.944 - 8.470% LIBOR 1 month + 0% - 5.00% Wtd. Avg. $ 5,439 Interest rate caps and collars $ 84,211 3.000% / 5.800% LIBOR 1 month + 0% - 3.75% Wtd. Avg. $ (20 )

Financial Instruments with Of_2

Financial Instruments with Off-Balance Sheet Risk (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2019 and December 31, 2018 : September 30, December 31, 2019 2018 Commitments to extend credit $ 1,909,221 $ 962,436 Standby and commercial letters of credit 33,360 5,431 Total $ 1,942,581 $ 967,867

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Summary of Lease Costs	The table below summarizes the Company’s net lease cost: Three Months Ended Nine Months Ended Operating lease cost $ 1,157 $ 3,920 Variable lease cost 293 700 Net lease cost $ 1,450 $ 4,620 The table below summarized other information related to the Company’s operating leases: Nine Months Ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,399 Weighted average remaining lease term - operating leases, in years 3.9 years Weighted average discount rate - operating leases 1.5 %
Summary of Remaining Lease Liabilities	A maturity analysis of operating lease liabilities and reconciliation of the undiscounted cash flows to the total operating lease liability is as follows: September 30, 2019 Lease payments due: Within one year $ 3,908 After one but within two years 3,390 After two but within three years 2,819 After three but within four years 2,586 After four but within five years 1,938 After five years 2,549 Total undiscounted cash flows 17,190 Less: Discount on cash flows (1,065 ) Total lease liability $ 16,125

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2019 Weighted Gross Net Amortization Intangible Accumulated Intangible Period Assets Impairment Amortization Assets Core deposit intangibles 7.2 years $ 81,769 $ — $ 11,755 $ 70,014 Servicing asset 7.1 years 5,468 188 1,759 3,521 Intangible lease assets 1.7 years 4,764 — 2,936 — 1,828 $ 92,001 $ 188 $ 16,450 $ 75,363 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 September 30, 2019 : September 30, 2019 Balance as of December 31, 2018 $ 161,447 Effect of Green acquisition 209,016 Balance as of September 30, 2019 $ 370,463

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Schedule Summarized of the Deposits	Deposits in the accompanying condensed consolidated balance sheets are summarized as follows: September 30, 2019 December 31, 2018 Noninterest-bearing demand accounts $ 1,473,126 $ 626,283 Interest-bearing demand accounts 373,997 146,969 Savings accounts 87,981 33,147 Limited access money market accounts 2,066,315 1,133,045 Certificates of deposit, greater than $100 1,212,718 392,935 Certificates of deposit, less than $100 663,709 290,049 Total $ 5,877,846 $ 2,622,428
Scheduled Maturities of Certificate of Deposits	As of September 30, 2019 , the scheduled maturities of certificates of deposit were as follows: Year Amount 2019 $ 519,916 2020 1,092,676 2021 198,091 2022 38,773 2023 26,971 Total $ 1,876,427

Advances from the Federal Hom_2

Advances from the Federal Home Loan Bank (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Schedule of Contractual Maturities of FHLB Advances	Contractual maturities of FHLB advances at September 30, 2019 were as follows: 2019 $ 225,000 2020 425,000 2021 75,000 2022 27,907 Total $ 752,907

Subordinated Debentures and S_2

Subordinated Debentures and Subordinated Notes (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Subordinated Debentures	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 September 30, 2019 was 2.1% . Total subordinated debentures as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Subordinated debentures $ 33,868 $ 11,702 Debt discount (3,899 ) — Total subordinated debentures $ 29,969 $ 11,702 Total subordinated notes as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Subordinated notes $ 40,000 $ 5,000 Unamortized debt premium (discount) 2,315 (11 ) Total subordinated notes $ 42,315 $ 4,989

Stock-Based and Liability-Cla_2

Stock-Based and Liability-Classified Awards (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Summary of Option Activity	A summary of option activity under the 2010 Incentive Plan for the nine months ended September 30, 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 (11,500 ) 10.48 Outstanding at September 30, 2018 293,500 $ 10.15 2.78 years Options exercisable at September 30, 2018 289,500 $ 10.13 2.75 years Outstanding at January 1, 2019 275,000 $ 10.12 2.39 years $ 3,098 Exercised (17,500 ) 10.24 Outstanding and exercisable at September 30, 2019 257,500 $ 10.28 1.62 years $ 3,699 A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of September 30, 2019 , and changes during the nine months then ended, is as follows: Veritex (Green) 2014 Plan Non-performance Based Stock Options Shares Weighted Weighted Aggregate Intrinsic Value Outstanding at January 1, 2019 — $ — Converted in acquisition of Green 304,778 15.41 Granted 211,793 21.38 Forfeited (10,217 ) 12.21 Exercised (82,451 ) 13.43 — Outstanding at September 30, 2019 423,903 $ 18.85 8.01 years $ 2,293 Options exercisable at September 30, 2019 213,427 $ 16.36 6.89 years $ 1,686 Weighted average fair value of options granted during the period $ 24.22 A summary of the status of the Company’s stock options under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine months then ended, is as follows: 2014 Omnibus Plan Non-performance Based Stock Options Equity Awards Liability Awards Shares Weighted Weighted Aggregate Intrinsic Value Shares Weighted Weighted Aggregate Intrinsic Value Outstanding at January 1, 2018 332,706 $ 22.71 8.86 years — $ — Granted 125,593 27.95 — — Forfeited (2,076 ) 27.59 — — Exercised (1,983 ) 14.95 — — Outstanding at September 30, 2018 454,240 $ 24.12 8.42 years $ — Options exercisable at September 30, 2018 122,329 $ 18.38 7.29 years — $ — Outstanding at January 1, 2019 449,520 $ 24.47 8.24 years — $ — Granted 166,971 23.91 253,633 21.38 Conversion to equity awards 253,633 21.38 (253,633 ) 21.38 Forfeited (28,240 ) 25.82 — — Exercised (12,610 ) 15.42 — — Outstanding at September 30, 2019 829,274 $ 23.50 8.42 years $ 632 — $ — $ — Options exercisable at September 30, 2019 417,183 $ 24.59 7.53 years $ (135 ) — $ — Weighted average fair value of options granted during the period $ 22.38 $ —
Summary of Status of the Company's Restricted Shares or Restricted Stock Units	A summary of the status of the Company’s non-performance-based restricted stock units under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine 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 54,650 29.29 — — Vested into shares (39,311 ) 27.19 — — Forfeited (3,929 ) 26.85 — — Outstanding at September 30, 2018 162,132 $ 23.85 — $ — Outstanding at January 1, 2019 133,455 $ 19.67 — $ — Granted 104,827 23.09 165,739 21.38 Conversion to equity awards 165,739 21.38 (165,739 ) 21.38 Vested into shares (229,031 ) 22.06 — — Outstanding at September 30, 2019 174,990 $ 21.55 — $ — A summary of the status of the Company’s performance based restricted stock units under the 2014 Omnibus Plan as of September 30, 2019 and 2018 , and changes during the nine 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 — — Forfeited (898 ) 27.59 — — Outstanding at September 30, 2018 66,342 $ 25.56 — $ — Outstanding at January 1, 2019 63,988 $ 21.28 — $ — Granted 38,360 22.47 32,249 21.38 Conversion to equity award 32,249 21.38 (32,249 ) 21.38 Vested into shares (51,284 ) 25.31 — — Forfeited (17,827 ) 21.38 — — Outstanding at September 30, 2019 65,486 $ 22.73 — $ — September 30, 2018 , and changes during the nine months then ended is as follows: 2010 Incentive Plan Nonperformance-based restricted stock units Units Weighted Average Grant Date Fair Value Outstanding at January 1, 2018 24,250 $ 13.19 Vested into shares (23,750 ) 12.14 Forfeited (500 ) 10.85 Outstanding at September 30, 2018 — $ — A summary of the status of the Company’s non-performance based restricted stock units under the Veritex (Green) 2014 Plan as of September 30, 2019 and changes during the nine 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 September 30, 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 September 30, 2019 and changes during the nine 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 Forfeited (508 ) 21.38 Outstanding at September 30, 2019 25,637 $ 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 for the nine months ended September 30, 2019 and 2018 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 2018 Non-performance based stock options exercised 454 328 Non-performance based restricted stock units vested — 713 A summary of the fair value of the Company’s stock options exercised and restricted stock units vested under the 2014 Omnibus Plan during the nine months ended September 30, 2019 and 2018 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 2018 Non-performance-based stock options exercised 335 54 Non-performance-based restricted stock units vested 5,669 1,173 Performance-based restricted stock units vested 1,089 745 Veritex (Green) 2014 Plan A summary of the status of the Company’s stock options under the Veritex (Green) 2014 Plan as of September 30, 2019 , and changes during the nine months then ended, is as follows: Veritex (Green) 2014 Plan Non-performance Based Stock Options Shares Weighted Weighted Aggregate Intrinsic Value Outstanding at January 1, 2019 — $ — Converted in acquisition of Green 304,778 15.41 Granted 211,793 21.38 Forfeited (10,217 ) 12.21 Exercised (82,451 ) 13.43 — Outstanding at September 30, 2019 423,903 $ 18.85 8.01 years $ 2,293 Options exercisable at September 30, 2019 213,427 $ 16.36 6.89 years $ 1,686 Weighted average fair value of options granted during the period $ 24.22 As of September 30, 2019 , there was $1,198 of total unrecognized compensation expense related to options awarded under the Veritex (Green) 2014 Plan. The unrecognized compensation expense at September 30, 2019 is expected to be recognized over the remaining weighted average requisite service period of 2.3 years . A summary of the status of the Company’s non-performance based restricted stock units under the Veritex (Green) 2014 Plan as of September 30, 2019 and changes during the nine 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 September 30, 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 September 30, 2019 and changes during the nine 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 Forfeited (508 ) 21.38 Outstanding at September 30, 2019 25,637 $ 21.38 As of September 30, 2019 , there was $2,243 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 2.3 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 during the nine months ended September 30, 2019 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 Non-performance-based stock options exercised $ 2,088 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 nine months ended September 30, 2019 . No stock options or restricted stock units were awarded from these plans during the nine months ended September 30, 2019 . During the nine months ended September 30, 2019 , 100,544 stock options were exercised from the Green 2010 Plan and 11,850 stock options were exercised from the Green 2006 Plan. As of September 30, 2019 , 661,843 exercisable stock options remain outstanding in the Green 2010 Plan and no exercisable stock options remain outstanding in the Green 2006 Plan.
Schedule of Vesting Percentages	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%
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 during the nine months ended September 30, 2019 and 2018 is presented below: Fair Value of Options Exercised or Restricted Stock Units Vested in the nine months ended September 30, 2019 2018 Non-performance-based stock options exercised 335 54 Non-performance-based restricted stock units vested 5,669 1,173 Performance-based restricted stock units vested 1,089 745 The fair value of each option award is estimated on the grant date using the Black-Scholes option-pricing model with the following assumptions used for the grants for the nine months ended September 30, 2019 and 2018 : Nine Months Ended September 30, 2019 2019 2018 Dividend yield 1.87% to 2.01% 0.00% Expected life 5.0 to 7.51 years 5.0 to 7.5 years Expected volatility 29.13% to 29.65% 27.87% to 37.55% Risk-free interest rate 1.72% to 2.51% 1.06% to 2.94%

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax expense for the three and nine months ended September 30, 2019 and 2018 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Income tax expense for the period $ 7,595 $ 1,448 $ 16,953 $ 7,309 Effective tax rate 21.7 % 13.9 % 21.6 % 19.8 %

Capital Requirements and Rest_2

Capital Requirements and Restrictions on Retained Earnings (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2019 Total capital (to risk-weighted assets) Company $ 850,136 12.26 % $ 554,738 8.0 % n/a n/a Bank 831,796 12.00 % 554,531 8.0 % $ 693,163 10.0 % Tier 1 capital (to risk-weighted assets) Company 780,700 11.26 % 416,004 6.0 % n/a n/a Bank 804,675 11.61 % 415,853 6.0 % 554,470 8.0 % Common equity tier 1 to risk-weighted assets Company 749,913 10.82 % 311,886 4.5 % n/a n/a Bank 804,675 11.61 % 311,890 4.5 % 450,507 6.5 % Tier 1 capital (to average assets) Company 780,700 10.33 % 302,304 4.0 % n/a n/a Bank 804,675 10.64 % 302,509 4.0 % 378,137 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 %

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 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	Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows: Estimate at Measurement Period Adjustments Revised Fair Value Assets Cash and cash equivalents $ 112,720 $ — $ 112,720 Investment securities 661,032 (240 ) 660,792 Other securities 40,287 — 40,287 Loans held for sale 9,360 — 9,360 Loans held for investment 3,245,492 (244 ) 3,245,248 Accrued interest receivable 11,673 (278 ) 11,395 Bank owned life insurance 56,841 — 56,841 Bank premises, furniture and equipment 39,426 (2,571 ) 36,855 Investment in unconsolidated subsidiaries 666 — 666 Intangible assets 65,718 — 65,718 Goodwill 206,821 2,195 209,016 Other assets 12,245 404 12,649 Right of use asset 9,373 — 9,373 Deferred Taxes 11,535 395 11,930 Current taxes 1,799 13 1,812 Branch assets held for sale 85,307 — 85,307 Total assets $ 4,570,295 $ (326 ) $ 4,569,969 Liabilities Non-interest-bearing deposits $ 825,364 $ — $ 825,364 Interest-bearing deposits 1,300,825 — 1,300,825 Certificates and other time deposits 1,346,915 — 1,346,915 Accounts payable and other accrued expenses 26,587 (326 ) 26,261 Lease liability 9,373 — 9,373 Accrued interest payable 5,181 — 5,181 Securities sold under agreements to repurchase 3,226 — 3,226 Advances from Federal Home Loan Bank 300,000 — 300,000 Subordinated debentures and subordinated notes 56,233 — 56,233 Branch liabilities held for sale 52,682 — 52,682 Total liabilities $ 3,926,386 $ (326 ) $ 3,926,060
Summary of Loans Acquired in a Business Combination	The following table discloses the fair value and contractual value of loans acquired from Green on January 1, 2019 : PCI loans Other acquired loans Total Acquired Loans Real Estate $ 132,006 $ 1,783,938 $ 1,915,944 Commercial 50,057 1,099,012 1,149,069 Mortgage warehouse — 166,850 166,850 Consumer 184 13,201 13,385 Total fair value 182,247 3,063,001 3,245,248 Contractual principal balance $ 242,013 $ 3,093,047 $ 3,335,060 The following table presents additional information about PCI loans acquired from Green on January 1, 2019 : PCI Loans Contractually required principal and interest $ 277,773 Non-accretable difference 75,656 Cash flows expected to be collected $ 202,117 Accretable difference 19,870 Fair value of PCI loans $ 182,247
Schedule of Assets and Liabilities Held For Sale	The following table discloses the 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 liabilities 1 323 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 $ 200,821 Net Income 78,359 Basic earnings per share $ 1.45 Diluted earnings per share 1.42

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segmentmortgage_officebranch	Sep. 30, 2018USD ($)	Jan. 01, 2020	Jan. 01, 2019USD ($)	Dec. 31, 2018
Nature of Organization:
Number of reportable segments | segment			1
Other noninterest income	$ (1,289,000)	$ (539,000)	$ (2,458,000)	$ (1,335,000)
Other interest investment income	816,000	108,000	2,129,000	442,000
Merger and acquisition expense	1,035,000	2,692,000	38,042,000	4,070,000
Goodwill, impairment loss	0	$ 0	0	$ 0
Right-of-use asset	15,278,000		15,278,000
Lease liability	$ 16,125,000		$ 16,125,000
Allowance for loan losses (as a percent)	0.45%	0.73%	0.45%	0.73%			0.75%
Dallas-Fort Worth
Nature of Organization:
Number of branches | branch			26
Number of mortgage offices | mortgage_office			1
Houston
Nature of Organization:
Number of branches | branch			12
Louisville, Kentucky
Nature of Organization:
Number of branches | branch			1
Accounting Standards Update 2016-02
Nature of Organization:
Right-of-use asset						$ 18,705,000
Lease liability						$ 18,753,000
Accounting Standards Update 2016-13
Nature of Organization:
Allowance for loan losses (as a percent)	0.45%		0.45%
Restatement Adjustment
Nature of Organization:
Other noninterest income		$ 102,000		$ 427,000
Other interest investment income		$ 102,000		$ 427,000
Minimum | Forecast | Accounting Standards Update 2016-13
Nature of Organization:
Allowance for loan losses (as a percent)					1.15%
Maximum | Forecast | Accounting Standards Update 2016-13
Nature of Organization:
Allowance for loan losses (as a percent)					1.35%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings (numerator)
Net income	$ 27,405	$ 8,935	$ 61,688	$ 29,516
Shares (denominator)
Weighted average shares outstanding for basic EPS (in shares)	52,915	24,176	53,721	24,151
Dilutive effect of employee stock based awards (in shares)	953	437	912	436
Adjusted weighted average shares outstanding (in shares)	53,868	24,613	54,633	24,587
EPS:
Basic (in dollars per share)	$ 0.52	$ 0.37	$ 1.15	$ 1.22
Diluted (in dollars per share)	$ 0.51	$ 0.36	$ 1.13	$ 1.20

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Excluded from diluted EPS weighted average shares (in shares)	0	0	0	0

Supplemental Statement of Cas_3

Supplemental Statement of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	$ 65,897	$ 19,939
Cash paid for income taxes	13,400	6,025
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	788
Reclassification of deferred offering costs paid in 2018 from other assets to additional paid-in-capital	(48)	0
Net foreclosure of other real estate owned and repossessed assets	4,625	8
Reclassification of branch assets held for sale to loans held for investment	26,171	0
Reclassification of branch liabilities held for sale to interest-bearing transaction and savings deposits	1,173	0
Non-cash assets acquired in business combination
Investment securities	660,792	0
Non-marketable equity securities	40,287	0
Loans held for sale	9,360	0
Loans held for investment	3,245,248	(4,050)
Accrued interest receivable	11,395	0
Bank-owned life insurance	56,841	0
Bank premises, furniture and equipment	36,855	1,162
Investment in unconsolidated subsidiaries	666	0
Intangible assets, net	65,718	(956)
Goodwill	209,016	1,995
Other assets	12,649	1,806
Right of use asset	9,373
Deferred taxes	11,930	0
Current taxes	1,812	0
Assets held for sale	85,307	0
Total assets	4,457,249	(43)
Non-cash liabilities assumed in business combination
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	26,261	0
Lease liability	9,373
Accrued interest payable and other liabilities	5,181	(260)
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	$ 3,926,060	$ 43

Share Transactions - (Details)

Share Transactions - (Details) - Common Stock - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 03, 2019	Jan. 28, 2019
Equity, Class of Treasury Stock [Line Items]
Stock buyback program, authorized amount			$ 100,000,000	$ 50,000,000
Stock repurchase program, additional amount authorized			$ 50,000,000
Shares repurchased (in shares)	1,177,241	2,349,103
Average price (in dollars per share)	$ 24.61	$ 25.03

Debt Securities - Carrying Amou

Debt Securities - Carrying Amount and Fair Values (Details) - USD ($)	Jan. 01, 2019	Sep. 30, 2019	Dec. 31, 2018
Available for sale
Amortized Cost		$ 962,677,000	$ 266,404,000
Gross Unrealized Gains		27,999,000	392,000
Gross Unrealized Losses		402,000	4,101,000
Fair Value		990,274,000	262,695,000
Held to maturity
Amortized Cost		33,119,000	0
Gross Unrealized Gains		2,058,000
Gross Unrealized Losses		0
Fair Value		35,177,000
Debt securities, transfer to trading, gain (loss)	$ 0
U.S. government agencies
Available for sale
Amortized Cost			9,096,000
Gross Unrealized Gains			0
Gross Unrealized Losses			118,000
Fair Value			8,978,000
Corporate bonds
Available for sale
Amortized Cost		77,005,000	26,518,000
Gross Unrealized Gains		1,909,000	84,000
Gross Unrealized Losses		90,000	134,000
Fair Value		78,824,000	26,468,000
Municipal securities
Available for sale
Amortized Cost		75,112,000	40,275,000
Gross Unrealized Gains		3,982,000	10,000
Gross Unrealized Losses		0	338,000
Fair Value		79,094,000	39,947,000
Held to maturity
Amortized Cost		22,579,000
Gross Unrealized Gains		1,397,000
Gross Unrealized Losses		0
Fair Value		23,976,000
Debt securities, transfer, amount	4,758,000
Mortgage-backed securities
Available for sale
Amortized Cost		338,144,000	97,117,000
Gross Unrealized Gains		10,175,000	101,000
Gross Unrealized Losses		59,000	2,167,000
Fair Value		348,260,000	95,051,000
Held to maturity
Amortized Cost		10,540,000
Gross Unrealized Gains		661,000
Gross Unrealized Losses		0
Fair Value		11,201,000
Debt securities, transfer, amount	$ 3,045,000
Collateralized mortgage obligations
Available for sale
Amortized Cost		398,665,000	92,906,000
Gross Unrealized Gains		9,135,000	197,000
Gross Unrealized Losses		253,000	1,344,000
Fair Value		407,547,000	91,759,000
Small Business Administration (SBA) guaranteed securities
Available for sale
Amortized Cost		73,751,000
Gross Unrealized Gains		2,798,000
Gross Unrealized Losses		0
Fair Value		$ 76,549,000
Asset-backed securities
Available for sale
Amortized Cost			492,000
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Fair Value			$ 492,000

Debt Securities - Unrealized Lo

Debt Securities - Unrealized Loss Position (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)investment	Dec. 31, 2018USD ($)investment
Available-for-Sale Fair Value
Less Than 12 Months	$ 29,846	$ 71,445
12 Months or More	9,401	115,907
Totals	39,247	187,352
Available-for-Sale Unrealized Loss
Less Than 12 Months	343	644
12 Months or More	59	3,457
Totals	$ 402	$ 4,101
Number of investment positions in an unrealized loss position (investments) | investment	10	142
Available-for-sale, number of securities sold | investment	142
U.S. government agencies
Available-for-Sale Fair Value
Less Than 12 Months		$ 5,671
12 Months or More		3,306
Totals		8,977
Available-for-Sale Unrealized Loss
Less Than 12 Months		68
12 Months or More		50
Totals		118
Corporate bonds
Available-for-Sale Fair Value
Less Than 12 Months	$ 5,591	6,689
12 Months or More	3,786	0
Totals	9,377	6,689
Available-for-Sale Unrealized Loss
Less Than 12 Months	83	134
12 Months or More	7	0
Totals	90	134
Municipal securities
Available-for-Sale Fair Value
Less Than 12 Months		16,043
12 Months or More		10,428
Totals		26,471
Available-for-Sale Unrealized Loss
Less Than 12 Months		92
12 Months or More		246
Totals		338
Mortgage-backed securities
Available-for-Sale Fair Value
Less Than 12 Months	1,860	24,277
12 Months or More	5,615	59,637
Totals	7,475	83,914
Available-for-Sale Unrealized Loss
Less Than 12 Months	7	279
12 Months or More	52	1,888
Totals	59	2,167
Collateralized mortgage obligations
Available-for-Sale Fair Value
Less Than 12 Months	22,395	18,765
12 Months or More	0	42,536
Totals	22,395	61,301
Available-for-Sale Unrealized Loss
Less Than 12 Months	253	71
12 Months or More	0	1,273
Totals	$ 253	$ 1,344

Debt Securities - Maturities (D

Debt Securities - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 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	4,897	34,933
Due from five years to ten years	68,614	19,682
Due after ten years	78,606	18,311
Total investment securities available for sale, single maturity date	152,117	75,889
Amortized Cost	962,677	266,404
Available For Sale Fair value
Due in one year or less	0	2,966
Due from one year to five years	5,090	34,854
Due from five years to ten years	70,271	19,468
Due after ten years	82,557	18,105
Total investment securities available for sale	157,918	75,393
Fair Value	990,274	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	1,209
Due after ten years	21,370
Total investment securities held to maturity, single maturity date	22,579
Amortized Cost	33,119	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	1,225
Due after ten years	22,751
Total investment securities held to maturity	23,976
Fair value	35,177
Mortgage-backed securities and collateralized mortgage obligations
Available For Sale Amortized Cost
Amortized cost	736,809	190,023
Amortized Cost	338,144	97,117
Available For Sale Fair value
Fair value	755,807	186,810
Fair Value	348,260	95,051
Held-to-Maturity Amortized Cost
Amortized cost	10,540
Amortized Cost	10,540
Held-to-Maturity Fair Value
Fair value	11,201
Fair value	11,201
Small Business Administration (SBA) guaranteed securities
Available For Sale Amortized Cost
Amortized cost	73,751
Amortized Cost	73,751
Available For Sale Fair value
Fair value	76,549
Fair Value	76,549
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

Debt Securities - Proceeds and

Debt Securities - Proceeds and Gross Gains/Losses (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Proceeds from sales of investment securities available for sale and gross gains and losses
Proceeds from sales	$ 254,397	$ 30,961
Gross realized gains	522	335
Gross realized losses	$ 1,936	$ 357

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Balance Sheet Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	$ 5,887,470	$ 2,555,509
Deferred loan fees	134	(15)
Less: Allowance for loan losses	(26,243)	(19,255)	$ (17,909)	$ (12,808)
Loans held for investment, net	5,861,361	2,536,239
PCI loans acquired	61,744	22,309
Discount on retained loans from sale	2,871	2,398
Commercial
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	1,711,256	760,772
Less: Allowance for loan losses	(11,238)	(8,554)	(8,104)	(5,588)
Mortgage warehouse
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	233,577	0
Consumer
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	18,114	7,112
Less: Allowance for loan losses	(124)	(19)	(5)	(22)
Construction and land | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	614,974	324,863
Farmland | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	16,633	10,528
Real estate | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	866,275	349,202
Less: Allowance for loan losses	(2,790)	(1,975)	(1,797)	(1,473)
Real estate | 1-4 family residential | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	559,310	297,917
Real estate | Multi-family residential | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	306,965	51,285
Commercial real estate | Real Estate
Loans and Allowance for Loan Losses
Loans held for investment, mortgage warehouse	2,426,641	1,103,032
Less: Allowance for loan losses	$ (8,488)	$ (6,463)	$ (6,136)	$ (4,410)

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Nonaccrual (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Loans and Allowance for Loan Losses
Nonaccrual	$ 10,172		$ 10,172		$ 24,745
Loans and leases receivable, impaired, interest lost on nonaccrual loans	243	$ 331	530	$ 371
Commercial
Loans and Allowance for Loan Losses
Nonaccrual	4,190		4,190		19,769
Mortgage warehouse
Loans and Allowance for Loan Losses
Nonaccrual	0		0		0
Consumer
Loans and Allowance for Loan Losses
Nonaccrual	85		85		2
Construction and land | Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	1,850		1,850		2,399
Farmland | Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	0		0		0
Real estate | 1-4 family residential | Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	1,188		1,188		0
Real estate | Multi-family residential | Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	0		0		0
Commercial real estate | Real Estate
Loans and Allowance for Loan Losses
Nonaccrual	$ 2,859		2,859		2,575
Financial Asset Acquired with Credit Deterioration
Loans and Allowance for Loan Losses
Loans and leases receivable, impaired, interest lost on nonaccrual loans			$ 0		$ 16,902

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	$ 44,940	$ 5,821
Total Current	5,694,054	2,508,858
Total loans	5,887,470	2,555,509
Total 90 days past due and still accruing	2,194	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	185,787	49,902
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	148,476	40,830
30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	9,942	4,727
60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	26,807	1,094
90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	8,191	0
90 Days or Greater | Financial Asset Acquired with Credit Deterioration
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total 90 days past due and still accruing	30,294	527
Real Estate | Construction and land
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	2,746	305
Total Current	607,821	324,558
Total loans	614,974	324,863
Total 90 days past due and still accruing	47	0
Real Estate | Construction and land | 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	4,407	0
Real Estate | Construction and land | 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	850	305
Real Estate | Construction and land | 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
Real Estate | Construction and land | 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	1,896	0
Real Estate | Farmland
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Total Current	16,633	10,528
Total loans	16,633	10,528
Total 90 days past due and still accruing	0	0
Real Estate | Farmland | 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	0	0
Real Estate | Farmland | 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
Real Estate | Farmland | 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
Real Estate | Farmland | 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	866,275	349,202
Real Estate | Real estate | 1-4 family residential
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	4,462	397
Total Current	550,236	297,435
Total loans	559,310	297,917
Total 90 days past due and still accruing	482	0
Real Estate | Real estate | 1-4 family residential | 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	4,612	85
Real Estate | Real estate | 1-4 family residential | 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	138	131
Real Estate | Real estate | 1-4 family residential | 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,168	266
Real Estate | Real estate | 1-4 family residential | 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	1,156	0
Real Estate | Real estate | Multifamily
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	0	0
Total Current	306,965	51,285
Total loans	306,965	51,285
Total 90 days past due and still accruing	0	0
Real Estate | Real estate | Multifamily | 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	0	0
Real Estate | Real estate | Multifamily | 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
Real Estate | Real estate | Multifamily | 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
Real Estate | Real estate | Multifamily | 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 | Commercial real estate
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	29,170	3,465
Total Current	2,300,288	1,082,559
Total loans	2,426,641	1,103,032
Total 90 days past due and still accruing	398	0
Real Estate | Commercial real estate | 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	97,183	17,008
Real Estate | Commercial 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	4,927	3,465
Real Estate | Commercial 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	23,165	0
Real Estate | Commercial 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	1,078	0
Commercial
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	8,124	1,644
Total Current	1,660,994	735,391
Total loans	1,711,256	760,772
Total 90 days past due and still accruing	1,129	0
Commercial | 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	42,138	23,737
Commercial | 30 to 59 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,851	816
Commercial | 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	435	828
Commercial | 90 Days or Greater
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	3,838	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	233,577
Total loans	233,577	0
Total 90 days past due and still accruing	0
Mortgage warehouse | 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	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	438	10
Total Current	17,540	7,102
Total loans	18,114	7,112
Total 90 days past due and still accruing	138	0
Consumer | 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	136	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	176	10
Consumer | 60 to 89 Days
Age analysis of past due loans, excluding purchased credit impaired loans, aggregated by class of loans
Total Past Due	39	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	$ 223	$ 0

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Impaired Loans
Unpaid Contractual Principal Balance	$ 9,239	$ 8,791
Recorded Investment with No Allowance	3,668	6,207
Recorded Investment with Allowance	5,571	2,584
Total Recorded Investment	9,239	8,791
Related Allowance	1,584	368
Average Recorded Investment YTD	9,769	9,289
Real Estate | Construction and land
Impaired Loans
Unpaid Contractual Principal Balance	1,850	2,016
Recorded Investment with No Allowance	184	2,016
Recorded Investment with Allowance	1,666	0
Total Recorded Investment	1,850	2,016
Related Allowance	166	0
Average Recorded Investment YTD	1,989	2,262
Real Estate | Farmland
Impaired Loans
Unpaid Contractual Principal Balance	0	0
Recorded Investment with No Allowance	0	0
Recorded Investment with Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment YTD	0	0
Real Estate | Real estate | 1-4 family residential
Impaired Loans
Unpaid Contractual Principal Balance	157	542
Recorded Investment with No Allowance	157	542
Recorded Investment with Allowance	0	0
Total Recorded Investment	157	542
Related Allowance	0	0
Average Recorded Investment YTD	158	565
Real Estate | Real estate | Multifamily
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
Real Estate | Commercial real estate
Impaired Loans
Unpaid Contractual Principal Balance	2,983	2,939
Recorded Investment with No Allowance	2,983	2,939
Recorded Investment with Allowance	0	0
Total Recorded Investment	2,983	2,939
Related Allowance	0	0
Average Recorded Investment YTD	3,210	3,032
Commercial
Impaired Loans
Unpaid Contractual Principal Balance	4,190	3,228
Recorded Investment with No Allowance	285	644
Recorded Investment with Allowance	3,905	2,584
Total Recorded Investment	4,190	3,228
Related Allowance	1,418	368
Average Recorded Investment YTD	4,352	3,351
Consumer
Impaired Loans
Unpaid Contractual Principal Balance	59	66
Recorded Investment with No Allowance	59	66
Recorded Investment with Allowance	0	0
Total Recorded Investment	59	66
Related Allowance	0	0
Average Recorded Investment YTD	$ 60	$ 79

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)Loan	Sep. 30, 2018Loan	Sep. 30, 2019USD ($)Loan	Sep. 30, 2018USD ($)Loan	Dec. 31, 2018USD ($)Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment for financing receivable, modifications	$ 1,132		$ 1,132		$ 1,171
Number of Loans | Loan			0	0	3
Post-Modification Outstanding Recorded Investment					$ 628
Financing receivable, modifications, subsequent default, number of contracts | Loan	0	0	0	0
Adjusted Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				$ 0
Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				612
Extended Maturity and Restructured Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				0
Extended Maturity, Restructured Payments and Adjusted Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				0
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | Loan					3
Post-Modification Outstanding Recorded Investment					$ 628
Commercial | Adjusted Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				0
Commercial | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				612
Commercial | Extended Maturity and Restructured Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				0
Commercial | Extended Maturity, Restructured Payments and Adjusted Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment				$ 0

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Credit Quality Indicators
Loans	$ 5,887,470	$ 2,555,509
Pass
Credit Quality Indicators
Loans	5,592,761	2,473,185
Special Mention
Credit Quality Indicators
Loans	95,231	18,052
Substandard
Credit Quality Indicators
Loans	51,002	23,442
Doubtful
Credit Quality Indicators
Loans	0	0
Commercial
Credit Quality Indicators
Loans	1,711,256	760,772
Commercial | Pass
Credit Quality Indicators
Loans	1,601,549	720,583
Commercial | Special Mention
Credit Quality Indicators
Loans	51,479	8,900
Commercial | Substandard
Credit Quality Indicators
Loans	16,090	7,552
Commercial | Doubtful
Credit Quality Indicators
Loans	0	0
Mortgage warehouse
Credit Quality Indicators
Loans	233,577	0
Mortgage warehouse | Pass
Credit Quality Indicators
Loans	233,577
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	18,114	7,112
Consumer | Pass
Credit Quality Indicators
Loans	17,725	6,950
Consumer | Special Mention
Credit Quality Indicators
Loans	37	0
Consumer | Substandard
Credit Quality Indicators
Loans	216	162
Consumer | Doubtful
Credit Quality Indicators
Loans	0	0
Construction and land | Real Estate
Credit Quality Indicators
Loans	614,974	324,863
Construction and land | Real Estate | Pass
Credit Quality Indicators
Loans	605,062	320,987
Construction and land | Real Estate | Special Mention
Credit Quality Indicators
Loans	2,320	1,860
Construction and land | Real Estate | Substandard
Credit Quality Indicators
Loans	3,185	2,016
Construction and land | Real Estate | Doubtful
Credit Quality Indicators
Loans	0	0
Farmland | Real Estate
Credit Quality Indicators
Loans	16,633	10,528
Farmland | Real Estate | Pass
Credit Quality Indicators
Loans	16,633	10,528
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	866,275	349,202
Real estate | Single Family | Real Estate
Credit Quality Indicators
Loans	559,310	297,917
Real estate | Single Family | Real Estate | Pass
Credit Quality Indicators
Loans	551,288	296,870
Real estate | Single Family | Real Estate | Special Mention
Credit Quality Indicators
Loans	1,432	236
Real estate | Single Family | Real Estate | Substandard
Credit Quality Indicators
Loans	1,978	726
Real estate | Single Family | Real Estate | Doubtful
Credit Quality Indicators
Loans	0	0
Real estate | Multifamily | Real Estate
Credit Quality Indicators
Loans	306,965	51,285
Real estate | Multifamily | Real Estate | Pass
Credit Quality Indicators
Loans	306,965	51,285
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	2,426,641	1,103,032
Commercial real estate | Real Estate | Pass
Credit Quality Indicators
Loans	2,259,962	1,065,982
Commercial real estate | Real Estate | Special Mention
Credit Quality Indicators
Loans	39,963	7,056
Commercial real estate | Real Estate | Substandard
Credit Quality Indicators
Loans	29,533	12,986
Commercial real estate | Real Estate | Doubtful
Credit Quality Indicators
Loans	0	0
Financial Asset Acquired with Credit Deterioration
Credit Quality Indicators
Loans	185,787	49,902
Financial Asset Acquired with Credit Deterioration | PCI
Credit Quality Indicators
Loans	148,476	40,830
Financial Asset Acquired with Credit Deterioration | Commercial | PCI
Credit Quality Indicators
Loans	42,138	23,737
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	136	0
Financial Asset Acquired with Credit Deterioration | Construction and land | Real Estate | PCI
Credit Quality Indicators
Loans	4,407	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	4,612	85
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	$ 97,183	$ 17,008

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Allowance (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Analysis of allowance for loan losses
Balance at beginning of period	$ 19,255	$ 12,808	$ 12,808
Provision (recapture) charged to earnings	18,021	5,239	6,603
Charge-offs	(11,272)	(171)	(197)
Recoveries	239	33	41
Net charge-offs (recoveries)	(11,033)	(138)	(156)
Balance at end of period	26,243	17,909	19,255
Allowance for loan losses (as a percent)				0.45%	0.75%	0.73%
Specific reserves
Total specific reserves				$ 1,584	$ 368	$ 378
PCI reserves				421	1,302	1,302
General reserves				24,238	17,585	16,229
Total	26,243	17,909	19,255	26,243	19,255	17,909
Commercial
Analysis of allowance for loan losses
Balance at beginning of period	8,554	5,588	5,588
Provision (recapture) charged to earnings	13,491	2,633	3,100
Charge-offs	(10,898)	(150)	(175)
Recoveries	91	33	41
Net charge-offs (recoveries)	(10,807)	(117)	(134)
Balance at end of period	11,238	8,104	8,554
Specific reserves
Total specific reserves				1,418	368	378
PCI reserves				421	1,302	1,302
General reserves				9,399	6,884	6,424
Total	11,238	5,588	5,588	11,238	8,554	8,104
Consumer
Analysis of allowance for loan losses
Balance at beginning of period	19	22	22
Provision (recapture) charged to earnings	236	4	19
Charge-offs	(217)	(21)	(22)
Recoveries	86	0	0
Net charge-offs (recoveries)	(131)	(21)	(22)
Balance at end of period	124	5	19
Specific reserves
Total specific reserves				0	0	0
PCI reserves				0	0	0
General reserves				124	19	5
Total	19	22	19	124	19	5
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	1,359	552	929
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Balance at end of period	3,603	1,867	2,244
Specific reserves
Total specific reserves				166	0	0
PCI reserves				0	0	0
General reserves				3,437	2,244	1,867
Total	2,244	1,315	2,244	3,603	2,244	1,867
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	910	324	502
Charge-offs	(157)	0	0
Recoveries	62	0	0
Net charge-offs (recoveries)	(95)	0	0
Balance at end of period	2,790	1,797	1,975
Specific reserves
Total specific reserves				0	0	0
PCI reserves				0	0	0
General reserves				2,790	1,975	1,797
Total	2,790	1,473	1,975	2,790	1,975	1,797
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	2,025	1,726	2,053
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Balance at end of period	8,488	6,136	6,463
Specific reserves
Total specific reserves				0	0	0
PCI reserves				0	0	0
General reserves				8,488	6,463	6,136
Total	$ 8,488	$ 4,410	$ 4,410	$ 8,488	$ 6,463	$ 6,136

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Allowance, Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Allowance, impairment methodology
Loans individually evaluated for impairment	$ 9,239	$ 8,791
Loans collectively evaluated for impairment	5,729,755	2,505,888
Total loans	5,887,470	2,555,509
Commercial Portfolio Segment
Allowance, impairment methodology
Loans individually evaluated for impairment	4,190	3,228
Loans collectively evaluated for impairment	1,898,505	733,807
Total loans	1,944,833	760,772
Consumer
Allowance, impairment methodology
Loans individually evaluated for impairment	59	66
Loans collectively evaluated for impairment	17,919	7,046
Total loans	18,114	7,112
Construction, Land and Farmland | Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	1,850	2,016
Loans collectively evaluated for impairment	625,350	333,375
Total loans	631,607	335,391
Residential | Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	157	542
Loans collectively evaluated for impairment	861,506	348,575
Total loans	866,275	349,202
Commercial real estate | Real Estate
Allowance, impairment methodology
Loans individually evaluated for impairment	2,983	2,939
Loans collectively evaluated for impairment	2,326,475	1,083,085
Total loans	2,426,641	1,103,032
Acquired Loans with Deteriorated Credit Quality
Allowance, impairment methodology
Loans receivable, net	148,476	40,830
Total loans	185,787	49,902
Acquired Loans with Deteriorated Credit Quality | Commercial Portfolio Segment
Allowance, impairment methodology
Loans receivable, net	42,138	23,737
Acquired Loans with Deteriorated Credit Quality | Consumer
Allowance, impairment methodology
Loans receivable, net	136	0
Acquired Loans with Deteriorated Credit Quality | Construction, Land and Farmland | Real Estate
Allowance, impairment methodology
Loans receivable, net	4,407	0
Acquired Loans with Deteriorated Credit Quality | Residential | Real Estate
Allowance, impairment methodology
Loans receivable, net	4,612	85
Acquired Loans with Deteriorated Credit Quality | Commercial real estate | Real Estate
Allowance, impairment methodology
Loans receivable, net	$ 97,183	$ 17,008

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - PCI Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment, net	$ 5,861,361	$ 2,536,239
Loans	5,887,470	2,555,509
Acquired Loans with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment, net	148,055	39,528
Loans	$ 185,787	$ 49,902

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - PCI Accretable Yield Rollforward (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 33,709,000	$ 7,335,000	$ 18,747,000	$ 2,723,000
Additions	0	0	18,073,000	1,459,000
Reclassifications (to) from nonaccretable	9,309,000	278,000	11,195,000	6,499,000
Accretion	(4,149,000)	(820,000)	(9,146,000)	(3,888,000)
Balance at end of period	38,762,000	6,793,000	38,762,000	6,793,000
Cash collections of certain loans acquired in transfer accounted for as debt securities	$ 28,000	$ 1,999,000	$ 441,000	$ 3,759,000

Loans and Allowance for Loan_13

Loans and Allowance for Loan Losses - Servicing Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Servicing Asset at Amortized Cost [Line Items]
Servicing asset	$ 241,733,000	$ 71,609,000	$ 241,733,000	$ 71,609,000
Summary of changes in related servicing assets
Balance at beginning of period	3,793,000	1,183,000	1,304,000	1,215,000
Servicing asset acquired through acquisition	0	0	2,382,000	0
Increase from loan sales	534,000	27,000	995,000	204,000
Servicing asset impairment	(188,000)	0	(188,000)	0
Amortization charged to income	(618,000)	(69,000)	(972,000)	(278,000)
Balance at end of period	3,521,000	$ 1,141,000	3,521,000	$ 1,141,000
Interest-only strip
Summary of changes in related servicing assets
Interest receivable	$ 0		$ 0		$ 0

Fair Value - Recurring Basis (D

Fair Value - Recurring Basis (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Assets measured at fair value
Available for sale securities	$ 990,274,000		$ 262,695,000
Recurring
Assets measured at fair value
Available for sale securities	990,274,000		262,695,000
Loans held for sale	8,468,000
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
Available for sale securities	0		0
Loans held for sale	0
Recurring | Level 2 Inputs
Assets measured at fair value
Available for sale securities	990,274,000		262,695,000
Loans held for sale	8,468,000
Recurring | Level 3 Inputs
Assets measured at fair value
Available for sale securities	0		$ 0
Loans held for sale	0
Interest rate swaps | Financial institution counterparty:
Assets measured at fair value
Derivative asset	7,000
Derivative liability	5,909,000
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	7,000
Derivative liability	5,909,000
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	5,437,000
Interest rate swaps | Commercial customer counterparty: | Level 1 Inputs
Assets measured at fair value
Derivative asset	0
Interest rate swaps | Commercial customer counterparty: | Level 2 Inputs
Assets measured at fair value
Derivative asset	5,437,000
Interest rate swaps | Commercial customer counterparty: | Level 3 Inputs
Assets measured at fair value
Derivative asset	0
Interest rate caps and collars | Financial institution counterparty:
Assets measured at fair value
Derivative asset	20,000
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	20,000
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	20,000
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	20,000
Interest rate caps and collars | Commercial customer counterparty: | Level 3 Inputs
Assets measured at fair value
Derivative liability	0
Interest rate floor | Financial institution counterparty:
Assets measured at fair value
Derivative asset	4,225,000
Interest rate floor | Financial institution counterparty: | Level 1 Inputs
Assets measured at fair value
Derivative asset	0
Interest rate floor | Financial institution counterparty: | Level 2 Inputs
Assets measured at fair value
Derivative asset	4,225,000
Interest rate floor | Financial institution counterparty: | Level 3 Inputs
Assets measured at fair value
Derivative asset	$ 0

Fair Value - Non-recurring Basi

Fair Value - Non-recurring Basis (Details)	Sep. 30, 2019USD ($)property	Dec. 31, 2018USD ($)property
Assets measured at fair value
Impaired loans, specific allowance	$ 1,584,000	$ 368,000
Other real estate owned, number of properties | property	2,000	0
Non-recurring
Assets measured at fair value
Impaired loans	$ 5,571,000	$ 2,584,000
Other real estate owned, fair value disclosure	4,625,000
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, fair value disclosure	0
Non-recurring | Level 2 Inputs
Assets measured at fair value
Impaired loans	0	0
Other real estate owned, fair value disclosure	0
Non-recurring | Level 3 Inputs
Assets measured at fair value
Impaired loans	5,571,000	$ 2,584,000
Other real estate owned, fair value disclosure	$ 4,625,000

Fair Value - Financial Instrume

Fair Value - Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets:
Held to maturity investments	$ 35,177
Financial liabilities:
Securities sold under agreements to repurchase	2,787	$ 0
Carrying Amount
Financial assets:
Cash and cash equivalents	252,592	84,449
Held to maturity investments	33,119
Loans held for sale	10,715	1,258
Loans held for investment		2,555,494
Accrued interest receivable	19,893	8,828
Bank-owned life insurance	80,411	22,064
Servicing asset	3,521	834
Other investments	89,795	22,822
Financial liabilities:
Deposits	5,877,846	2,622,428
Advances from FHLB	752,907	28,019
Accrued interest payable	7,355	1,135
Subordinated debentures and subordinated notes	72,284	16,691
Securities sold under agreements to repurchase	2,787
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		0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Other investments	0	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
Level 2 Inputs | Fair Value
Financial assets:
Cash and cash equivalents	252,592	84,449
Held to maturity investments	35,177
Loans held for sale	10,715	1,258
Loans held for investment		0
Accrued interest receivable	19,893	8,828
Bank-owned life insurance	80,411	22,064
Servicing asset	3,521	834
Other investments	89,795	22,822
Financial liabilities:
Deposits	5,772,171	2,506,379
Advances from FHLB	778,243	28,063
Accrued interest payable	7,355	1,135
Subordinated debentures and subordinated notes	72,284	16,691
Securities sold under agreements to repurchase	2,787
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		2,553,376
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Servicing asset	0	0
Other investments	0	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
Mortgage warehouse | Carrying Amount
Financial assets:
Loans held for investment	233,577
Mortgage warehouse | Level 1 Inputs | Fair Value
Financial assets:
Loans held for investment	0
Mortgage warehouse | Level 2 Inputs | Fair Value
Financial assets:
Loans held for investment	0
Mortgage warehouse | Level 3 Inputs | Fair Value
Financial assets:
Loans held for investment	237,945
Real Estate, Commercial and Consumer Portfolio Segments | Carrying Amount
Financial assets:
Loans held for investment	5,654,027
Real Estate, Commercial and Consumer Portfolio Segments | Level 1 Inputs | Fair Value
Financial assets:
Loans held for investment	0
Real Estate, Commercial and Consumer Portfolio Segments | Level 2 Inputs | Fair Value
Financial assets:
Loans held for investment	0
Real Estate, Commercial and Consumer Portfolio Segments | Level 3 Inputs | Fair Value
Financial assets:
Loans held for investment	$ 5,681,565

Derivative Financial Instrume_3

Derivative Financial Instruments - Balance Sheet Information (Details) - USD ($)	Sep. 30, 2019	May 31, 2019
Derivative [Line Items]
Notional Amount	$ 898,298,000
Asset Derivative
Offsetting derivative assets/liabilities	28,000
Net derivatives in the consolidated balance sheets	9,717,000
Liability Derivative
Offsetting derivative assets/liabilities	28,000
Net derivatives in the consolidated balance sheets	5,957,000
Interest rate floor
Derivative [Line Items]
Notional Amount		$ 275,000,000
Designated as hedging instrument | Interest rate floor
Derivative [Line Items]
Notional Amount	275,000,000
Asset Derivative
Gross derivatives	4,225,000
Liability Derivative
Gross derivatives	0
Non-hedging derivatives
Derivative [Line Items]
Notional Amount	623,298,000
Asset Derivative
Gross derivatives	5,464,000
Liability Derivative
Gross derivatives	5,929,000
Financial institution counterparty: | Interest rate floor
Asset Derivative
Gross derivatives	4,225,000
Financial institution counterparty: | Interest rate swaps
Asset Derivative
Gross derivatives	7,000
Liability Derivative
Gross derivatives	5,909,000
Financial institution counterparty: | Interest rate caps and collars
Asset Derivative
Gross derivatives	20,000
Financial institution counterparty: | Non-hedging derivatives | Interest rate swaps
Derivative [Line Items]
Notional Amount	227,438,000
Asset Derivative
Gross derivatives	7,000
Liability Derivative
Gross derivatives	5,909,000
Financial institution counterparty: | Non-hedging derivatives | Interest rate caps and collars
Derivative [Line Items]
Notional Amount	84,211,000
Asset Derivative
Gross derivatives	20,000
Liability Derivative
Gross derivatives	0
Commercial customer counterparty: | Interest rate swaps
Asset Derivative
Gross derivatives	5,437,000
Commercial customer counterparty: | Interest rate caps and collars
Liability Derivative
Gross derivatives	20,000
Commercial customer counterparty: | Non-hedging derivatives | Interest rate swaps
Derivative [Line Items]
Notional Amount	227,438,000
Asset Derivative
Gross derivatives	5,437,000
Liability Derivative
Gross derivatives	0
Commercial customer counterparty: | Non-hedging derivatives | Interest rate caps and collars
Derivative [Line Items]
Notional Amount	84,211,000
Asset Derivative
Gross derivatives	0
Liability Derivative
Gross derivatives	$ 20,000

Derivative Financial Instrume_4

Derivative Financial Instruments - AOCI Reclassification (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Interest rate floor | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain recognized in other comprehensive income on cash flow derivative	$ 413	$ 2,033
Interest rate floor | Interest Income | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing)	(334)	(473)
Interest rate floor | Noninterest income | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in noninterest income	0	0
Interest rate swaps | Non-hedging derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain recognized in other comprehensive income on cash flow derivative	0	0
Loss recognized in interest income on cash flow derivative (amount excluded from effectiveness testing)	0	0
Interest rate swaps | Noninterest income | Non-hedging derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in noninterest income	$ 604	$ 474

Derivative Financial Instrume_5

Derivative Financial Instruments - Narrative (Details) - USD ($)	1 Months Ended
	May 31, 2019	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount		$ 898,298,000
Interest rate floor
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 275,000,000
Term of contract	2 years
Floor interest rate	2.43%
Derivative, purchase option price	$ 2,665,000

Derivative Financial Instrume_6

Derivative Financial Instruments - Summary of Interest Rate Swaps Outstanding (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Derivative [Line Items]
Notional Amount	$ 898,298
Non-hedging derivatives
Derivative [Line Items]
Notional Amount	623,298
Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 227,438
Maturity	3 years 2 months 12 days
Fair Value	$ (5,902)
Non-hedging derivatives | Financial institution counterparty: | Interest rate caps and collars
Derivative [Line Items]
Notional Amount	$ 84,211
Maturity	1 year 9 months 18 days
Fair Value	$ 20
Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 227,438
Maturity	3 years 2 months 12 days
Fair Value	$ 5,439
Non-hedging derivatives | Commercial customer counterparty: | Interest rate caps and collars
Derivative [Line Items]
Notional Amount	$ 84,211
Maturity	1 year 9 months 18 days
Fair Value	$ (20)
Prime Rate | Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	0.25%
Prime Rate | Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	0.25%
Minimum | Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Fixed Rate	2.944%
Minimum | Non-hedging derivatives | Financial institution counterparty: | Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	3.00%
Minimum | Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Fixed Rate	2.944%
Minimum | Non-hedging derivatives | Commercial customer counterparty: | Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	2.50%
Minimum | LIBOR | Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	0.00%
Minimum | LIBOR | Non-hedging derivatives | Financial institution counterparty: | Interest rate caps and collars
Derivative [Line Items]
Floating Rate	0.00%
Minimum | LIBOR | Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	0.00%
Minimum | LIBOR | Non-hedging derivatives | Commercial customer counterparty: | Interest rate caps and collars
Derivative [Line Items]
Floating Rate	0.00%
Maximum | Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Fixed Rate	8.47%
Maximum | Non-hedging derivatives | Financial institution counterparty: | Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	5.80%
Maximum | Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Fixed Rate	8.47%
Maximum | Non-hedging derivatives | Commercial customer counterparty: | Interest rate caps and collars
Derivative [Line Items]
Fixed Rate	5.80%
Maximum | LIBOR | Non-hedging derivatives | Financial institution counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	5.00%
Maximum | LIBOR | Non-hedging derivatives | Financial institution counterparty: | Interest rate caps and collars
Derivative [Line Items]
Floating Rate	3.75%
Maximum | LIBOR | Non-hedging derivatives | Commercial customer counterparty: | Interest rate swaps
Derivative [Line Items]
Floating Rate	5.00%
Maximum | LIBOR | Non-hedging derivatives | Commercial customer counterparty: | Interest rate caps and collars
Derivative [Line Items]
Floating Rate	3.75%

Financial Instruments with Of_3

Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial instruments with off-balance sheet risk
Total commitments	$ 1,942,581	$ 967,867
Commitments to extend credit
Financial instruments with off-balance sheet risk
Total commitments	1,909,221	962,436
Standby and commercial letters of credit
Financial instruments with off-balance sheet risk
Total commitments	$ 33,360	$ 5,431

Leases (Details)

Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Right-of-use asset	$ 15,278	$ 15,278
Lease liability	16,125	16,125
Lease, Cost [Abstract]
Operating lease cost	1,157	3,920
Variable lease cost	293	700
Net lease cost	$ 1,450	4,620
Operating cash flows from operating leases		$ 3,399
Weighted-average remaining lease term - operating leases, in years	3 years 10 months 24 days	3 years 10 months 24 days
Weighted-average discount rate - operating leases	1.50%	1.50%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term		1 year
Extension options	5 years	5 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term		8 years
Extension options	10 years	10 years

Leases - Maturity (Details)

Leases - Maturity (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Within one year	$ 3,908
After one but within two years	3,390
After two but within three years	2,819
After three but within four years	2,586
After four but within five years	1,938
After five years	2,549
Total undiscounted cash flows	17,190
Less: Discount on cash flows	(1,065)
Total lease liability	$ 16,125

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Summary Of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Asset	$ 92,001		$ 23,424
Impairment	188
Accumulated Amortization	16,450		7,528
Net Intangible Asset	75,363		$ 15,896
Amortization of intangibles	$ 8,922	$ 3,087
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	7 years 2 months 12 days		7 years 8 months 12 days
Gross Intangible Asset	$ 81,769		$ 16,051
Impairment	0
Accumulated Amortization	11,755		4,376
Net Intangible Asset	$ 70,014		$ 11,675
Servicing asset
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	7 years 1 month 6 days		6 years 9 months 18 days
Gross Intangible Asset	$ 5,468		$ 2,091
Impairment	188
Accumulated Amortization	1,759		787
Net Intangible Asset	$ 3,521		$ 1,304
Intangible lease assets
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period	1 year 8 months 12 days		2 years 8 months 12 days
Gross Intangible Asset	$ 4,764		$ 5,282
Impairment	0
Accumulated Amortization	2,936		2,365
Net Intangible Asset	$ 1,828		$ 2,917

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill - Summary of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill [Roll Forward]
Balance as of beginning of period	$ 161,447
Effect of Green acquisition	209,016
Balance as of end of period	$ 370,463

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Noninterest-bearing demand accounts	$ 1,473,126	$ 626,283
Interest-bearing demand accounts	373,997	146,969
Savings accounts	87,981	33,147
Limited access money market accounts	2,066,315	1,133,045
Certificates of deposit, greater than $100	1,212,718	392,935
Certificates of deposit, less than $100	663,709	290,049
Total deposits	$ 5,877,846	$ 2,622,428

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Certificates of Deposit (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
2019	$ 519,916
2020	1,092,676
2021	198,091
2022	38,773
2023	26,971
Total	$ 1,876,427	$ 682,984

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Demand deposit overdrafts reclassified as loans	$ 168	$ 153
Brokered deposits	$ 416,125	$ 234,190

Advances from the Federal Hom_3

Advances from the Federal Home Loan Bank - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank	$ 752,907	$ 28,019
Availability to borrow additional funds	$ 822,980
Weighted Average
Debt Instrument [Line Items]
Advances from Federal Home Loan Bank, rate	1.51%

Advances from the Federal Hom_4

Advances from the Federal Home Loan Bank - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
2019	$ 225,000
2020	425,000
2021	75,000
2022	27,907
Total	$ 752,907	$ 28,019

Subordinated Debentures and S_3

Subordinated Debentures and Subordinated Notes (Details) $ in Thousands	Jan. 01, 2019USD ($)	Sep. 30, 2019USD ($)issuance	Dec. 31, 2018USD ($)
LIBOR
Debt Instrument [Line Items]
Interest rate		2.10%
Subordinated Notes
Debt Instrument [Line Items]
Debt outstanding		$ 40,000	$ 5,000
Unamortized debt premium (discount)		2,315	(11)
Total subordinated debt		42,315	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)		(3,899)	0
Total subordinated debt		29,969	$ 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]
Financial liabilities assumed	$ 35,000

Stock-Based and Liability-Cla_3

Stock-Based and Liability-Classified Awards - 2010 Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
2010 Stock Option and Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 0	$ 11,000	$ 2,000	$ 21,000

Stock-Based and Liability-Cla_4

Stock-Based and Liability-Classified Awards - 2010 Plan - Options (Details) - Nonperformance-based stock options - 2010 Stock Option and Equity Incentive Plan - USD ($)	Jan. 01, 2018	Jan. 01, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Shares Underlying Options
Outstanding at beginning of period (in shares)	305,000		275,000	305,000	305,000
Exercised (in shares)			(17,500)	(11,500)
Outstanding at the end of period (in shares)			257,500	293,500	275,000
Options exercisable at end of period (in shares)				289,500
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 10.16		$ 10.12	$ 10.16	$ 10.16
Exercised (in dollars per share)			10.24	10.48
Outstanding at the end of period (in dollars per share)			$ 10.28	10.15	$ 10.12
Options exercisable at end of period (in dollars per share)				$ 10.13
Weighted Average Contractual Term
Outstanding	2 years 4 months 20 days	3 years 7 months 2 days	1 year 7 months 13 days	2 years 9 months 10 days
Exercisable				2 years 9 months
Aggregate Intrinsic Value
Outstanding			$ 3,699,000		$ 3,098,000
Unrecognized compensation expense			$ 0	$ 4,000	$ 2,000

Stock-Based and Liability-Cla_5

Stock-Based and Liability-Classified Awards - 2010 Plan - Restricted Stock Units (Details) - 2010 Stock Option and Equity Incentive Plan - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Non Performance Based Stock Options
Weighted Average Grant Date Fair Value
Unrecognized compensation expense	$ 0	$ 4,000	$ 2,000
Non-performance based stock options exercised	454,000	328,000
Non-performance based restricted stock units vested	$ 0	$ 713,000
Restricted Stock Units
Units
Outstanding at the beginning of the period (in shares)		24,250
Vested into shares (in shares)		(23,750)
Forfeited (in shares)		(500)
Outstanding at the end of the period (in shares)	0	0
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)		$ 13.19
Vested into shares (in dollars per share)		12.14
Forfeited (in dollars per share)		10.85
Outstanding at the end of the period (in dollars per share)		$ 0
Unrecognized compensation expense	$ 0	$ 4,000	$ 0

Stock-Based and Liability-Cla_6

Stock-Based and Liability-Classified Awards - Omnibus Plan (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jan. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost					$ 5,535
Stock based compensation expense			$ 1,054	$ 928	1,691	$ 3,054
Veritex Green Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense			376		1,147
Non-performance based equity 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
Accelerated compensation cost			$ 5,533		$ 1,418
Performance based equity 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
Percentage of outstanding shares canceled		67.00%
Number of shares canceled (in shares)		12,704
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
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-Cla_7

Stock-Based and Liability-Classified Awards - Vesting (Details)	9 Months Ended
	Sep. 30, 2019installmentcompanyshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, installments | installment	3
Number of peer companies | company	15
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, installments | installment	3
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, installments | installment	5
Performance based equity 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 equity 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 equity 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 equity 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 equity 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 equity 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 equity 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 equity 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%
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Omnibus Plan | Performance based equity restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) | shares	100,000
Omnibus Plan | Time-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) | shares	10,000
Omnibus Plan | Time-based restricted stock unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) | shares	15,000

Stock-Based and Liability-Cla_8

Stock-Based and Liability-Classified Awards - Omnibus Plan Black Scholes Assumptions - (Details) - Omnibus Plan and Veritex Green Plan	9 Months Ended
	Sep. 30, 2019	Sep. 30, 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%
Expected volatility, minimum (as a percent)	29.13%	27.87%
Expected volatility, maximum (as a percent)	29.65%	37.55%
Risk-free interest rate, minimum (as a percent)	1.72%	1.06%
Risk-free interest rate, maximum (as a percent)	2.51%	2.94%
Minimum
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)	1.87%
Expected life	5 years	5 years
Maximum
Assumptions used to measure fair value of each option award estimated on grant date using Black-Scholes option-pricing model
Dividend yield (as a percent)	2.01%
Expected life	7 years 6 months 4 days	7 years 6 months

Stock-Based and Liability-Cla_9

Stock-Based and Liability-Classified Awards - Stock Compensation Expense and Liability Award Compensation Expense (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1,054		$ 928	$ 1,691	$ 3,054
Accelerated compensation cost					5,535
Veritex Green Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		376			1,147
Non-performance based equity restricted stock units | Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost		5,533			1,418
Liability Awards | Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expensed and capitalized amount		$ 0	$ 1,403		$ 1,403
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-Cl_10

Stock-Based and Liability-Classified Awards - Omnibus Plan - Options (Details) - Omnibus Plan - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Nonperformance-based stock options
Shares Underlying Options
Outstanding at beginning of period (in shares)	449,520	332,706	332,706
Granted (in shares)	166,971	125,593
Conversion to equity awards (in shares)	253,633
Forfeited (in shares)	(28,240)	(2,076)
Exercised (in shares)	(12,610)	(1,983)
Outstanding at the end of period (in shares)	829,274	454,240	449,520	332,706
Options exercisable at end of period (in shares)	417,183	122,329
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 24.47	$ 22.71	$ 22.71
Granted (in dollars per share)	23.91	27.95
Conversion to equity awards (in dollars per share)	21.38
Forfeited (in dollars per share)	25.82	27.59
Exercised (in dollars per share)	15.42	14.95
Outstanding at the end of period (in dollars per share)	23.50	24.12	$ 24.47	$ 22.71
Options exercisable at end of period (in dollars per share)	24.59	$ 18.38
Weighted average fair value of options granted during the period (in dollars per share)	$ 22.38
Weighted Average Contractual Term
Outstanding	8 years 5 months 1 day	8 years 5 months 1 day	8 years 2 months 26 days	8 years 10 months 9 days
Exercisable	7 years 6 months 10 days	7 years 3 months 14 days
Aggregate Intrinsic Value
Outstanding	$ 632,000
Exercisable	$ (135,000)
Liability Non Performance Based Stock Options
Shares Underlying Options
Outstanding at beginning of period (in shares)	0	0	0
Granted (in shares)	253,633	0
Conversion to equity awards (in shares)	253,633
Forfeited (in shares)	0	0
Exercised (in shares)	0	0
Outstanding at the end of period (in shares)	0		0	0
Options exercisable at end of period (in shares)	0	0
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 0	$ 0	$ 0
Granted (in dollars per share)	21.38	0
Conversion to equity awards (in dollars per share)	21.38
Forfeited (in dollars per share)	0	0
Exercised (in dollars per share)	0	0
Outstanding at the end of period (in dollars per share)	0	0	$ 0	$ 0
Options exercisable at end of period (in dollars per share)	0	$ 0
Weighted average fair value of options granted during the period (in dollars per share)	$ 0
Weighted Average Contractual Term
Outstanding
Exercisable
Aggregate Intrinsic Value
Outstanding	$ 0
Exercisable
Unrecognized compensation expense	0
Stock option
Aggregate Intrinsic Value
Unrecognized compensation expense	$ 1,296,000	$ 2,330,000	$ 2,103,000
Requisite service period to recognize compensation cost	2 years 7 months 13 days

Stock-Based and Liability-Cl_11

Stock-Based and Liability-Classified Awards - Omnibus Plan - Restricted Stock Units (Details) - Omnibus Plan - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Non-performance based equity restricted stock units
Units
Outstanding at the beginning of the period (in shares)	133,455	150,722
Granted (in shares)	104,827	54,650
Conversion to equity awards (in shares)	165,739
Vested into shares (in shares)	(229,031)	(39,311)
Forfeited (in shares)		(3,929)
Outstanding at the end of the period (in shares)	174,990	162,132
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 19.67	$ 13.29
Granted (in dollars per share)	23.09	29.29
Conversion to equity awards (in dollars per share)	21.38
Vested into shares (in dollars per share)	22.06	27.19
Forfeited (in dollars per share)		26.85
Outstanding at the end of the period (in dollars per share)	$ 21.55	$ 23.85
Non-performance based liability restricted stock units
Units
Outstanding at the beginning of the period (in shares)	0	0
Granted (in shares)	165,739	0
Conversion to equity awards (in shares)	165,739
Vested into shares (in shares)	0	0
Forfeited (in shares)		0
Outstanding at the end of the period (in shares)	0	0
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 0	$ 0
Granted (in dollars per share)	21.38	0
Conversion to equity awards (in dollars per share)	21.38
Vested into shares (in dollars per share)	0	0
Forfeited (in dollars per share)		0
Outstanding at the end of the period (in dollars per share)	$ 0	$ 0
Performance based equity restricted stock units
Units
Outstanding at the beginning of the period (in shares)	63,988	53,594
Granted (in shares)	38,360	40,269
Conversion to equity awards (in shares)	32,249
Vested into shares (in shares)	(51,284)	(26,623)
Forfeited (in shares)	(17,827)	(898)
Outstanding at the end of the period (in shares)	65,486	66,342
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 21.28	$ 8.72
Granted (in dollars per share)	22.47	27.59
Conversion to equity awards (in dollars per share)	21.38
Vested into shares (in dollars per share)	25.31	18.83
Forfeited (in dollars per share)	21.38	27.59
Outstanding at the end of the period (in dollars per share)	$ 22.73	$ 25.56
Performance based restricted stock units
Units
Outstanding at the beginning of the period (in shares)	0	0
Granted (in shares)	32,249	0
Conversion to equity awards (in shares)	(32,249)
Vested into shares (in shares)	0	0
Forfeited (in shares)	0	0
Outstanding at the end of the period (in shares)	0	0
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 0	$ 0
Granted (in dollars per share)	21.38	0
Conversion to equity awards (in dollars per share)	21.38
Vested into shares (in dollars per share)	0	0
Forfeited (in dollars per share)	0	0
Outstanding at the end of the period (in dollars per share)	$ 0	$ 0
Restricted Stock Units
Additional disclosures
Unrecognized compensation expense	$ 2,484,000	$ 3,928,000	$ 3,430,000
Requisite service period to recognize compensation cost	2 years 3 months 18 days
Liability Restricted Stock Units
Additional disclosures
Unrecognized compensation expense	$ 0

Stock-Based and Liability-Cl_12

Stock-Based and Liability-Classified Awards - Fair Value Options Exercised or Restricted Stock Units Vested (Details) - Omnibus Plan - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Non-performance based equity restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-performance-based stock options exercised	$ 335	$ 54
Non-performance based restricted stock units vested	5,669	1,173
Performance based equity restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-performance based restricted stock units vested	$ 1,089	$ 745

Stock-Based and Liability-Cl_13

Stock-Based and Liability-Classified Awards - Veritex Green Omnibus Plan Options (Details) - Veritex Green Omnibus Plan $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares	Dec. 31, 2018$ / sharesshares
Nonperformance-based stock options
Shares Underlying Options
Outstanding at beginning of period (in shares) | shares	0
Converted in acquisition of Green (in shares) | shares	304,778
Granted (in shares) | shares	211,793
Forfeited (in shares) | shares	(10,217)
Exercised (in shares) | shares	(82,451)
Outstanding at the end of period (in shares) | shares	423,903	0
Options exercisable at end of period (in shares) | shares	213,427
Weighted Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 0
Converted in acquisition of Green (in dollars per share)		$ 15.41
Granted (in dollars per share)	21.38
Forfeited (in dollars per share)	12.21
Exercised (in dollars per share)	13.43
Outstanding at the end of period (in dollars per share)	18.85	$ 0
Options exercisable at end of period (in dollars per share)	16.36
Weighted average fair value of options granted during the period (in dollars per share)	$ 24.22
Weighted Average Contractual Term
Outstanding	8 years 3 days
Exercisable	6 years 10 months 20 days
Aggregate Intrinsic Value
Outstanding | $	$ 2,293
Exercisable | $	1,686
Stock option
Aggregate Intrinsic Value
Unrecognized compensation expense | $	$ 1,198
Requisite service period to recognize compensation cost	2 years 3 months 18 days

Stock-Based and Liability-Cl_14

Stock-Based and Liability-Classified Awards - Veritex Green Omnibus Plan Restricted Stock Units (Details) - Veritex Green Omnibus Plan $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares
Non-performance based equity restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at the beginning of the period (in shares) | shares	0
Number of shares awarded (in shares) | shares	116,250
Outstanding at the end of the period (in shares) | shares	116,250
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	21.38
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 21.38
Performance based equity restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at the beginning of the period (in shares) | shares	0
Number of shares awarded (in shares) | shares	26,145
Forfeited (in shares) | shares	(508)
Outstanding at the end of the period (in shares) | shares	25,637
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	21.38
Forfeited (in dollars per share) | $ / shares	21.38
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 21.38
Restricted Stock Units
Weighted Average Grant Date Fair Value
Unrecognized compensation expense | $	$ 2,243
Requisite service period to recognize compensation cost	2 years 3 months 18 days
Nonperformance-based stock options
Weighted Average Grant Date Fair Value
Non-performance-based stock options exercised | $	$ 2,088

Stock-Based and Liability-Cl_15

Stock-Based and Liability-Classified Awards - Green Bancorp Inc. 2010 Option Plan (Details)	9 Months Ended
	Sep. 30, 2019planshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock and incentive plans assumed in acquisition | plan	2
Green Bancorp Inc. 2010 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Converted in acquisition of Green (in shares)	768,628
Number of shares awarded under stock options (in shares)	0
Exercise of employee stock options (in shares)	100,544
Shares outstanding (in shares)	661,843
Green Bancorp Inc. 2006 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Converted in acquisition of Green (in shares)	11,850
Number of shares awarded under stock options (in shares)	11,850
Shares outstanding (in shares)	0
Restricted Stock Units | Green Bancorp Inc. 2010 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-option equity instruments, granted (in shares)	0
Restricted Stock Units | Green Bancorp Inc. 2006 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-option equity instruments, granted (in shares)	0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense for the period		$ 7,595	$ 1,448	$ 16,953	$ 7,309
Effective tax rate		21.70%	13.90%	21.60%	19.80%
Liability for uncertain tax positions assumed	$ 2,155

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Qualified affordable housing investment	$ 3,385	$ 3,663
Qualified affordable housing project investments, unfunded commitment	$ 1,554	$ 2,510

Capital Requirements and Rest_3

Capital Requirements and Restrictions on Retained Earnings (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Total capital (to risk-weighted assets)
Actual Amount	$ 850,136,000	$ 850,136,000	$ 394,419,000
Actual Ratio (as a percent)	12.26%	12.26%	12.98%
For Capital Adequacy Purposes Amount	$ 554,738,000	$ 554,738,000	$ 243,093,000
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%	8.00%
Tier 1 capital (to risk-weighted assets)
Actual Amount	$ 780,700,000	$ 780,700,000	$ 370,175,000
Actual Ratio (as a percent)	11.26%	11.26%	12.18%
For Capital Adequacy Purposes Amount	$ 416,004,000	$ 416,004,000	$ 182,352,000
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%	6.00%
Common equity tier 1 to risk-weighted assets
Actual Amount	$ 749,913,000	$ 749,913,000	$ 358,473,000
Actual Ratio (as a percent)	10.82%	10.82%	11.80%
For Capital Adequacy Purposes Amount	$ 311,886,000	$ 311,886,000	$ 136,706,000
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%	4.50%
Tier 1 capital (to average assets)
Actual Amount	$ 780,700,000	$ 780,700,000	$ 370,175,000
Actual Ratio (as a percent)	10.33%	10.33%	12.04%
For Capital Adequacy Purposes Amount	$ 302,304,000	$ 302,304,000	$ 122,982,000
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%	4.00%
Dividends paid	$ 6,713,000	$ 20,312,000
Bank
Total capital (to risk-weighted assets)
Actual Amount	$ 831,796,000	$ 831,796,000	$ 353,640,000
Actual Ratio (as a percent)	12.00%	12.00%	11.64%
For Capital Adequacy Purposes Amount	$ 554,531,000	$ 554,531,000	$ 243,052,000
For Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 693,163,000	$ 693,163,000	$ 303,814,000
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	10.00%	10.00%	10.00%
Tier 1 capital (to risk-weighted assets)
Actual Amount	$ 804,675,000	$ 804,675,000	$ 334,385,000
Actual Ratio (as a percent)	11.61%	11.61%	11.01%
For Capital Adequacy Purposes Amount	$ 415,853,000	$ 415,853,000	$ 182,226,000
For Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 554,470,000	$ 554,470,000	$ 242,968,000
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	8.00%	8.00%	8.00%
Common equity tier 1 to risk-weighted assets
Actual Amount	$ 804,675,000	$ 804,675,000	$ 334,385,000
Actual Ratio (as a percent)	11.61%	11.61%	11.01%
For Capital Adequacy Purposes Amount	$ 311,890,000	$ 311,890,000	$ 136,670,000
For Capital Adequacy Purposes Amount (as a percent)	4.50%	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 450,507,000	$ 450,507,000	$ 197,412,000
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	6.50%	6.50%	6.50%
Tier 1 capital (to average assets)
Actual Amount	$ 804,675,000	$ 804,675,000	$ 334,385,000
Actual Ratio (as a percent)	10.64%	10.64%	10.87%
For Capital Adequacy Purposes Amount	$ 302,509,000	$ 302,509,000	$ 123,049,000
For Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 378,137,000	$ 378,137,000	$ 153,811,000
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	5.00%	5.00%	5.00%
Dividends paid	$ 6,713,000	$ 20,312,000	$ 0
Dividends paid (in dollars per share)	$ 0.125	$ 0.125

Branch Assets and Liabilities_2

Branch Assets and Liabilities Held For Sale (Details) - USD ($)	May 10, 2019	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of business	$ 7,153,000
Loss on disposal	$ 474,000
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Branch assets held for sale		$ 0	$ 85,307,000	$ 0
Branch liabilities held for sale		$ 0	$ 52,682,000	$ 0

Business Combinations - Narrati

Business Combinations - Narrative (Details) - USD ($)	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 370,463,000		$ 370,463,000		$ 161,447,000
Merger and acquisition expense		$ 1,035,000	$ 2,692,000	$ 38,042,000	$ 4,070,000
Common Stock
Business Acquisition [Line Items]
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)		352	10,221	226,581	74,706
Exercise of employee stock options (in shares)		92,572		211,246	7,401
Green Bancorp, Inc.
Business Acquisition [Line Items]
Goodwill	$ 209,016,000
Share conversion rate (in shares)	0.79
Exercise of employee stock options (in shares)	1,085,256
Merger and acquisition expense		$ 1,035,000	$ 2,692,000	$ 38,042,000	$ 3,104,000
Premium on time deposits	$ 7,318,000
Amortization period	1 year 8 months 12 days
Green Bancorp, Inc. | Subordinated Debt
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
Green Bancorp, Inc. | Core deposit intangibles
Business Acquisition [Line Items]
Intangible assets, net	$ 65,718,000
Acquired intangible assets, weighted average useful life	8 years
Green Bancorp, Inc. | Common Stock
Business Acquisition [Line Items]
Restricted stock units vested, net of shares withheld to cover tax withholdings (in shares)				497,594
Green Bancorp, Inc. | Stock-Based Compensation
Business Acquisition [Line Items]
Merger and acquisition expense		17,082,000
Green Bancorp, Inc. | Severance Payments
Business Acquisition [Line Items]
Merger and acquisition expense		9,491,000
Green Bancorp, Inc. | Legal And Professional Fees
Business Acquisition [Line Items]
Merger and acquisition expense		5,297,000
Green Bancorp, Inc. | Data Processing
Business Acquisition [Line Items]
Merger and acquisition expense		$ 1,824,000

Business Combinations - Conside

Business Combinations - Consideration Transferred (Details) - Green Bancorp, Inc. $ / shares in Units, shares in Thousands, $ in Thousands	Jan. 01, 2019USD ($)$ / sharesshares
Business Acquisition [Line Items]
Equivalent shares of Veritex common stock issued in exchange for Green outstanding shares (in shares) | shares	29,532,957
Veritex common stock price per share as of close date (in dollars per share) | $ / shares	$ 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 - Acquire

Business Combinations - Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets
Goodwill	$ 370,463		$ 161,447
Green Bancorp, Inc.
Assets
Cash and cash equivalents		$ 112,720
Investment securities		660,792
Other securities		40,287
Loans held for sale		9,360
Loans held for investment		3,245,248
Accrued interest receivable		11,395
Bank owned life insurance		56,841
Bank premises, furniture and equipment		36,855
Investment in unconsolidated subsidiaries		666
Intangible assets		65,718
Goodwill		209,016
Other assets		12,649
Right of use asset		9,373
Deferred Taxes		11,930
Current taxes		1,812
Branch assets held for sale		85,307
Total assets		4,569,969
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		26,261
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		3,926,060
Measurement Period Adjustments
Investment securities	(240)
Loans held for investment	(244)
Accrued interest receivable	(278)
Bank premises, furniture and equipment	(2,571)
Goodwill	2,195
Other assets	404
Deferred Taxes	395
Current taxes	13
Total assets	(326)
Accounts payable and other accrued expenses	(326)
Total liabilities	$ (326)
Previously Reported | 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 A

Business Combinations - Loans Acquired (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Contractual principal balance	$ 61,744		$ 22,309
Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		$ 3,245,248
Contractual principal balance		3,335,060
Acquired Loans with Deteriorated Credit Quality | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		182,247
Contractual principal balance		242,013
Contractually required principal and interest		277,773
Non-accretable difference		75,656
Cash flows expected to be collected		202,117
Accretable difference		19,870
Real Estate | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,915,944
Real Estate | Acquired Loans with Deteriorated Credit Quality | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		132,006
Commercial | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,149,069
Commercial | Acquired Loans with Deteriorated Credit Quality | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		50,057
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		3,063,001
Contractual principal balance		3,093,047
Other Acquired Loans | Real Estate | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,783,938
Other Acquired Loans | Commercial | Green Bancorp, Inc.
Business Acquisition [Line Items]
Total fair value		1,099,012
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

Business Combinations - Assets Held For Sale (Details) - USD ($)	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Disposal Group, Held-for-sale, Not Discontinued Operations
Business Acquisition [Line Items]
Cash and cash equivalents		$ 392,000
Loans		78,366,000
Bank premises, furniture and equipment		19,000
Intangible assets		6,013,000
Other assets		517,000
Total assets	$ 0	85,307,000	$ 0
Noninterest-bearing deposits		52,319,000
Accounts payable and accrued expenses		40,000
Accrued interest payable and other liabilities		323,000
Total liabilities	$ 0	52,682,000	$ 0
Green Bancorp, Inc.
Business Acquisition [Line Items]
Expected selling costs		$ 90,000

Business Combinations - Pro For

Business Combinations - Pro Forma Information (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)$ / shares
Business Combinations [Abstract]
Net Interest Income | $	$ 200,821
Net Income | $	$ 78,359
Basic EPS (in dollars per share) | $ / shares	$ 1.45
Diluted EPS (in dollars per share) | $ / shares	$ 1.42