Independent Bank (IBTX) 10-Q 26 Jul 22 2022 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2022	Jul. 22, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-35854
Entity Registrant Name	Independent Bank Group, Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	13-4219346
Entity Address, Address Line One	7777 Henneman Way
Entity Address, City or Town	McKinney,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75070-1711
City Area Code	972
Local Phone Number	562-9004
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	IBTX
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		41,168,830
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001564618
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 179,394	$ 243,926
Interest-bearing deposits in other banks	596,737	2,364,518
Cash and cash equivalents	776,131	2,608,444
Certificates of deposit held in other banks	1,265	3,245
Securities available for sale, at fair value	1,846,132	2,006,727
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively	207,972	0
Loans held for sale (includes $23,885 and $28,249 carried at fair value, respectively)	26,519	32,124
Loans, net of allowance for credit losses of $144,170 and $148,706, respectively	13,373,958	12,290,740
Premises and equipment, net	337,679	308,023
Other real estate owned	12,900	0
Federal Home Loan Bank (FHLB) of Dallas stock and other restricted stock	18,495	21,573
Bank-owned life insurance (BOLI)	237,714	235,637
Deferred tax asset	69,467	26,178
Goodwill	994,021	994,021
Other intangible assets, net	69,227	75,490
Other assets	135,613	130,446
Total assets	18,107,093	18,732,648
Deposits:
Noninterest-bearing	5,123,321	5,066,588
Interest-bearing	9,940,627	10,487,320
Total deposits	15,063,948	15,553,908
FHLB advances	175,000	150,000
Other borrowings	334,718	283,371
Junior subordinated debentures	54,320	54,221
Other liabilities	114,772	114,498
Total liabilities	15,742,758	16,155,998
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,156,261 and 42,756,234 shares outstanding, respectively)	412	428
Additional paid-in capital	1,951,317	1,945,497
Retained earnings	578,201	625,484
Accumulated other comprehensive (loss) income	(165,595)	5,241
Total stockholders’ equity	2,364,335	2,576,650
Total liabilities and stockholders’ equity	$ 18,107,093	$ 18,732,648

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for credit losses, securities held to maturity	$ 0	$ 0
Loans held for sale, fair value option	23,885	28,249
Allowance for credit losses, loans	$ 144,170	$ 148,706
Preferred stock, shares outstanding (shares)	0	0
Common stock, shares outstanding (shares)	41,156,261	42,756,234

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income:
Interest and fees on loans	$ 138,426	$ 137,620	$ 267,605	$ 277,772
Interest on taxable securities	8,243	5,252	16,602	10,009
Interest on nontaxable securities	2,741	2,061	5,074	4,130
Interest on interest-bearing deposits and other	1,286	872	2,280	1,665
Total interest income	150,696	145,805	291,561	293,576
Interest expense:
Interest on deposits	8,110	11,487	13,720	24,494
Interest on FHLB advances	164	537	343	1,070
Interest on other borrowings	3,869	4,043	7,351	8,103
Interest on junior subordinated debentures	554	441	1,000	883
Total interest expense	12,697	16,508	22,414	34,550
Net interest income	137,999	129,297	269,147	259,026
Provision for credit losses	0	(6,500)	(1,443)	(9,000)
Net interest income after provision for credit losses	137,999	135,797	270,590	268,026
Noninterest income:
Service charges on deposit accounts	3,050	2,250	5,802	4,511
Investment management fees	2,391	2,086	4,842	4,129
Mortgage banking revenue	2,490	5,237	5,516	12,732
Mortgage warehouse purchase program fees	731	1,730	1,689	3,699
(Loss) gain on sale of loans	(17)	26	(1,501)	26
Loss on sale and disposal of premises and equipment	(46)	(13)	(209)	(20)
Increase in cash surrender value of BOLI	1,327	1,287	2,637	2,559
Other	3,951	3,323	7,986	6,899
Total noninterest income	13,877	15,926	26,762	34,535
Noninterest expense:
Salaries and employee benefits	51,130	43,837	100,685	87,496
Occupancy	10,033	10,852	20,033	20,458
Communications and technology	5,830	5,581	11,731	11,117
FDIC assessment	1,589	1,467	3,082	3,172
Advertising and public relations	703	376	1,159	614
Other real estate owned expenses, net	66	4	66	12
Amortization of other intangible assets	3,118	3,145	6,263	6,290
Professional fees	4,094	3,756	7,533	7,426
Other	9,362	8,995	17,830	16,541
Total noninterest expense	85,925	78,013	168,382	153,126
Income before taxes	65,951	73,710	128,970	149,435
Income tax expense	13,591	15,467	25,870	31,212
Net income	$ 52,360	$ 58,243	$ 103,100	$ 118,223
Basic earnings per share (usd per share)	$ 1.25	$ 1.35	$ 2.44	$ 2.74
Diluted earnings per share (usd per share)	$ 1.25	$ 1.35	$ 2.44	$ 2.73

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 52,360	$ 58,243	$ 103,100	$ 118,223
Other comprehensive (loss) income before tax:
Unrealized (losses) gains arising during the period, excluding the change attributable to available for sale securities reclassified to held to maturity	(102,411)	3,675	(208,975)	(17,888)
Tax effect	(21,506)	772	(43,885)	(3,756)
Unrealized (losses) gains arising during the period, net of tax, excluding the change attributable to available for sale securities reclassified to held to maturity	(80,905)	2,903	(165,090)	(14,132)
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities	(5)	0	(10)	0
Tax effect	(1)	0	(2)	0
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities, net of tax	(4)	0	(8)	0
Change in unrealized (losses) gains on securities, net of tax	(80,909)	2,903	(165,098)	(14,132)
Unrealized holding (losses) gain arising during the period	(2,055)	545	(7,020)	545
Tax effect	(432)	114	(1,474)	114
Unrealized (losses) gains arising during the period, net of tax	(1,623)	431	(5,546)	431
Reclassification of amount of gains recognized into income	(41)	(157)	(243)	(157)
Tax effect	(9)	(33)	(51)	(33)
Reclassification of amount of gains recognized into income, net of tax	(32)	(124)	(192)	(124)
Change in unrealized (losses) gains on derivative financial instruments	(1,655)	307	(5,738)	307
Other comprehensive (loss) income, net of tax	(82,564)	3,210	(170,836)	(13,825)
Comprehensive (loss) income	$ (30,204)	$ 61,453	$ (67,736)	$ 104,398

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock $0.01 Par	Common Stock $0.01 Par Value	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Effect of change in accounting principles	Cumulative Effect of change in accounting principles Retained Earnings	Adjusted beginning balance	Adjusted beginning balance Preferred Stock $0.01 Par	Adjusted beginning balance Common Stock $0.01 Par Value	Adjusted beginning balance Additional Paid in Capital	Adjusted beginning balance Retained Earnings	Adjusted beginning balance Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 2,515,371	$ 0	$ 431	$ 1,934,807	$ 543,800	$ 36,333	$ (53,880)	$ (53,880)	$ 2,461,491	$ 0	$ 431	$ 1,934,807	$ 489,920	$ 36,333
Beginning balance (shares) at Dec. 31, 2020			43,137,104								43,137,104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	118,223				118,223
Other comprehensive (loss) income, net of tax	(13,825)					(13,825)
Common stock repurchased (shares)			(25,211)
Common stock repurchased	(1,665)		$ 0		(1,665)
Restricted stock forfeited (shares)			(22,327)
Restricted stock forfeited	0
Restricted stock granted (shares)			91,041
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	5,554			5,554
Cash dividends ($0.38 and $0.76 per share for the three and six months ended June 30, 2022 and $0.32 and $0.62 per share for the three and six months ended June 30, 2021)	(26,893)				(26,893)
Ending balance at Jun. 30, 2021	2,542,885	0	$ 432	1,940,360	579,585	22,508
Ending balance (shares) at Jun. 30, 2021			43,180,607
Beginning balance at Mar. 31, 2021	2,493,117	0	$ 432	1,938,012	535,375	19,298
Beginning balance (shares) at Mar. 31, 2021			43,193,257
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58,243				58,243
Other comprehensive (loss) income, net of tax	3,210					3,210
Common stock repurchased (shares)			(2,376)
Common stock repurchased	(176)		$ 0		(176)
Restricted stock forfeited (shares)			(17,821)
Restricted stock forfeited	0
Restricted stock granted (shares)			7,547
Restricted stock granted	0
Stock based compensation expense	2,348			2,348
Cash dividends ($0.38 and $0.76 per share for the three and six months ended June 30, 2022 and $0.32 and $0.62 per share for the three and six months ended June 30, 2021)	(13,857)				(13,857)
Ending balance at Jun. 30, 2021	2,542,885	0	$ 432	1,940,360	579,585	22,508
Ending balance (shares) at Jun. 30, 2021			43,180,607
Beginning balance at Dec. 31, 2021	2,576,650	0	$ 428	1,945,497	625,484	5,241
Beginning balance (shares) at Dec. 31, 2021			42,756,234
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	103,100				103,100
Other comprehensive (loss) income, net of tax	(170,836)					(170,836)
Common stock repurchased (shares)			(1,679,711)
Common stock repurchased	(118,111)		$ (17)		(118,094)
Restricted stock forfeited (shares)			(4,546)
Restricted stock forfeited	0
Restricted stock granted (shares)			84,284
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	5,821			5,821
Cash dividends ($0.38 and $0.76 per share for the three and six months ended June 30, 2022 and $0.32 and $0.62 per share for the three and six months ended June 30, 2021)	(32,289)				(32,289)
Ending balance at Jun. 30, 2022	2,364,335	0	$ 412	1,951,317	578,201	(165,595)
Ending balance (shares) at Jun. 30, 2022			41,156,261
Beginning balance at Mar. 31, 2022	2,522,460	0	$ 428	1,947,909	657,154	(83,031)
Beginning balance (shares) at Mar. 31, 2022			42,795,228
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	52,360				52,360
Other comprehensive (loss) income, net of tax	(82,564)					(82,564)
Common stock repurchased (shares)			(1,642,136)
Common stock repurchased	(115,322)		$ (17)		(115,305)
Restricted stock forfeited (shares)			(3,831)
Restricted stock forfeited	0
Restricted stock granted (shares)			7,000
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	3,409			3,409
Cash dividends ($0.38 and $0.76 per share for the three and six months ended June 30, 2022 and $0.32 and $0.62 per share for the three and six months ended June 30, 2021)	(16,008)				(16,008)
Ending balance at Jun. 30, 2022	$ 2,364,335	$ 0	$ 412	$ 1,951,317	$ 578,201	$ (165,595)
Ending balance (shares) at Jun. 30, 2022			41,156,261

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Preferred stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock shares authorized (shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000
Common stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (shares)	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000
Dividends paid (usd per share)	$ 0.38	$ 0.32	$ 0.76	$ 0.62

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 103,100	$ 118,223
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	6,442	6,245
Accretion income recognized on loans	(6,678)	(11,491)
Amortization of other intangibles assets	6,263	6,290
Amortization of premium on securities, net	3,551	2,217
Amortization of discount and origination costs on borrowings	446	447
Stock based compensation expense	5,821	5,554
Excess tax benefit on restricted stock vested	(352)	(226)
FHLB stock dividends	(52)	(65)
Loss on sale and disposal of premises and equipment	209	20
Loss (gain) on sale of loans	1,501	(26)
Impairment of other assets	0	9
Deferred tax expense	2,122	5,159
Provision for credit losses	(1,443)	(9,000)
Increase in cash surrender value of BOLI	(2,637)	(2,559)
Excess benefit claim on BOLI	(784)	0
Net gain on mortgage loans held for sale	(2,627)	(11,135)
Originations of loans held for sale	(176,220)	(379,965)
Proceeds from sale of loans held for sale	184,452	430,063
Net change in other assets	(1,436)	19,766
Net change in other liabilities	(41,051)	(32,656)
Net cash provided by operating activities	80,627	146,870
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns	7,108,419	7,260,655
Proceeds from sales	0	181
Purchases AFS	(7,277,267)	(7,701,683)
Purchases HTM	(91,065)	0
Proceeds from maturities of certificates of deposit held in other banks	1,980	1,237
Proceeds from benefit claim of BOLI	1,344	0
Purchases of FHLB stock and other restricted stock	0	(1,190)
Proceeds from redemptions of FHLB stock and other restricted stock	3,130	0
Proceeds from sale of loans	19,333	1,519
Net loans originated held for investment	(1,328,900)	93,496
Originations of mortgage warehouse purchase loans	(8,285,502)	(15,548,728)
Proceeds from pay-offs of mortgage warehouse purchase loans	8,536,160	16,108,201
Additions to premises and equipment	(36,316)	(9,789)
Proceeds from sale of premises and equipment	9	21
Net cash (used in) provided by investing activities	(1,348,675)	203,920
Cash flows from financing activities:
Net (decrease) increase in demand deposits, money market and savings accounts	(308,525)	840,204
Net decrease in time deposits	(181,435)	(175,340)
Proceeds from FHLB advances	75,000	0
Repayments of FHLB advances	(50,000)	0
Proceeds from other borrowings	111,000	2,500
Repayments of other borrowings	(60,000)	(9,000)
Repurchase of common stock	(118,111)	(1,665)
Dividends paid	(32,194)	(26,776)
Net cash (used in) provided by financing activities	(564,265)	629,923
Net change in cash and cash equivalents	(1,832,313)	980,713
Cash and cash equivalents at beginning of period	2,608,444	1,813,987
Cash and cash equivalents at end of period	$ 776,131	$ 2,794,700

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Nature of operations: Independent Bank Group, Inc. (IBG) through its subsidiary, Independent Bank, a Texas state banking corporation, doing business as Independent Financial, (Bank) (collectively known as the Company), provides a full range of banking services to individual and corporate customers in the North, Central and Southeast Texas areas and along the Colorado Front Range, through its various branch locations in those areas. The Company is engaged in traditional community banking activities, which include commercial and retail lending, deposit gathering, and investment and liquidity management activities. The Company’s primary deposit products are demand deposits, money market accounts and certificates of deposit and its primary lending products are commercial business and real estate, real estate mortgage and consumer loans. Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation. The consolidated interim financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company's Annual Report on Form 10-K for the year ended December 31, 2021. The consolidated balance sheet at December 31, 2021 has been derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative. Segment reporting: The Company has one reportable segment. The Company’s chief operating decision-maker uses consolidated results to make operating and strategic decisions. Reclassifications: Certain prior period financial statement and disclosure amounts have been reclassified to conform to current period presentation. The reclassifications have no effect on net income or stockholders' equity as previously reported. Use of estimates: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Accordingly, actual results could differ from those estimates. The material estimates included in the financial statements relate to the allowance for credit losses, the valuation of goodwill and valuation of assets and liabilities acquired in business combinations. Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the Securities and Exchange Commission (SEC) and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 11. Subsequent Events . Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the three and six months ended June 30, 2022 and 2021. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price. The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Basic earnings per share: Net income $ 52,360 $ 58,243 $ 103,100 $ 118,223 Less: Undistributed earnings allocated to participating securities 297 444 566 931 Dividends paid on participating securities 129 138 256 272 Net income available to common shareholders $ 51,934 $ 57,661 $ 102,278 $ 117,020 Weighted average basic shares outstanding 41,397,584 42,756,162 41,913,218 42,743,877 Basic earnings per share $ 1.25 $ 1.35 $ 2.44 $ 2.74 Diluted earnings per share: Net income available to common shareholders $ 51,934 $ 57,661 $ 102,278 $ 117,020 Total weighted average basic shares outstanding 41,397,584 42,756,162 41,913,218 42,743,877 Add dilutive performance stock units 75,909 59,145 75,378 54,690 Total weighted average diluted shares outstanding 41,473,493 42,815,307 41,988,596 42,798,567 Diluted earnings per share $ 1.25 $ 1.35 $ 2.44 $ 2.73 Anti-dilutive participating securities 123,849 205,989 135,953 197,851

Statement of Cash Flows

Statement of Cash Flows	6 Months Ended
	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Statement of Cash Flows	Note 2. Statement of Cash Flows As allowed by the accounting standards, the Company has chosen to report, on a net basis, its cash receipts and cash payments for time deposits accepted and repayments of those deposits, and loans made to customers and principal collections on those loans. The Company uses the indirect method to present cash flows from operating activities. Other supplemental cash flow information is presented below: Six Months Ended June 30, 2022 2021 Cash transactions: Interest expense paid $ 22,358 $ 35,130 Income taxes paid $ 15,038 $ 28,183 Noncash transactions: Deferred dividend equivalents $ 95 $ 117 Transfer of loans to other real estate owned $ 12,900 $ — Transfer of securities available for sale to held to maturity $ 117,583 $ — Right-of-use assets obtained in exchange for lease liabilities $ 4,012 $ 57 Loans purchased, not yet settled $ 30,298 $ 38,859

Securities

Securities	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	Note 3. Securities Securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost of securities and their approximate fair values at June 30, 2022 and December 31, 2021 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale June 30, 2022 U.S. treasuries $ 260,417 $ — $ (15,767) $ 244,650 Government agency securities 479,869 10 (63,171) 416,708 Obligations of state and municipal subdivisions 277,289 446 (12,070) 265,665 Corporate bonds 46,997 9 (2,795) 44,211 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 982,676 38 (108,766) 873,948 Other securities 950 — — 950 $ 2,048,198 $ 503 $ (202,569) $ 1,846,132 December 31, 2021 U.S. treasuries $ 174,950 $ 724 $ (678) $ 174,996 Government agency securities 453,402 1,221 (9,948) 444,675 Obligations of state and municipal subdivisions 418,554 15,440 (1,234) 432,760 Corporate bonds 33,994 862 (60) 34,796 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 917,942 10,757 (10,149) 918,550 Other securities 950 — — 950 $ 1,999,792 $ 29,004 $ (22,069) $ 2,006,727 Securities Held to Maturity June 30, 2022 Obligations of state and municipal subdivisions $ 207,972 $ — $ (40,493) $ 167,479 ____________ (1) Excludes accrued interest receivable of $8,000 on available for sale and $2,338 on held to maturity securities at June 30, 2022 and $8,581 on available for sale securities at December 31, 2021 that is recorded in other assets on the accompanying consolidated balance sheets. During the three months ended March 31, 2022, the Company reclassified, at fair value, approximately $117,583 in available for sale obligations of state and municipal subdivisions to the held to maturity category, primarily to limit future volatility in equity due to potential increases in interest rates. The related net unrealized pre-tax gains of approximately $26 remained in accumulated other comprehensive income (loss) and will be amortized over the remaining life of the securities, as an adjustment of the yield on the transferred securities. No transfers of securities occurred in 2021 and as of December 31, 2021, there were no securities held to maturity. The amortized cost and estimated fair value of securities at June 30, 2022, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. June 30, 2022 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 39,472 $ 39,513 $ — $ — Due from one year to five years 334,871 321,689 — — Due from five to ten years 452,348 404,933 — — Thereafter 238,831 206,049 207,972 167,479 1,065,522 972,184 207,972 167,479 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 982,676 873,948 — — $ 2,048,198 $ 1,846,132 $ 207,972 $ 167,479 ____________ (1) Excludes accrued interest receivable of $8,000 on available for sale and $2,338 on held to maturity securities at June 30, 2022 that is recorded in other assets on the accompanying consolidated balance sheets. Securities with a carrying amount of approximately $995,375 and $997,416 at June 30, 2022 and December 31, 2021, respectively, were pledged primarily to secure deposits. There were no sales of securities during the three and six months ended June 30, 2022. Proceeds from sale of securities available for sale and gross gains and gross losses for the three and six months ended June 30, 2021 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2021 Proceeds from sale $ 181 $ 181 Gross gains $ — $ — Gross losses $ — $ — The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of June 30, 2022 and December 31, 2021, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale June 30, 2022 U.S. treasuries 36 $ 244,650 $ (15,767) — $ — $ — $ 244,650 $ (15,767) Government agency securities 48 268,923 (32,522) 28 139,028 (30,649) 407,951 (63,171) Obligations of state and municipal subdivisions 235 165,919 (12,070) — — — 165,919 (12,070) Corporate bonds 11 37,205 (2,795) — — — 37,205 (2,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 322 731,489 (82,869) 30 129,595 (25,897) 861,084 (108,766) 652 $ 1,448,186 $ (146,023) 58 $ 268,623 $ (56,546) $ 1,716,809 $ (202,569) December 31, 2021 U.S. treasuries 22 $ 144,172 $ (678) — $ — $ — $ 144,172 $ (678) Government agency securities 38 258,334 (4,622) 22 119,963 (5,326) 378,297 (9,948) Obligations of state and municipal subdivisions 14 47,200 (988) 2 3,555 (246) 50,755 (1,234) Corporate bonds 3 13,440 (60) — — — 13,440 (60) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 115 621,717 (8,471) 11 44,620 (1,678) 666,337 (10,149) 192 $ 1,084,863 $ (14,819) 35 $ 168,138 $ (7,250) $ 1,253,001 $ (22,069) Securities Held to Maturity June 30, 2022 Obligations of state and municipal subdivisions 38 $ 157,120 $ (37,314) 5 $ 10,359 $ (3,179) $ 167,479 $ (40,493) The Company's securities classified as available for sale and held to maturity are evaluated for expected credit losses by applying the appropriate expected credit losses methodology in accordance with ASC Topic 326, "Financial Instruments - Credit Losses." At June 30, 2022 , management's review of all securities at an unrealized loss position determined that the losses resulted from factors not related to credit quality. This conclusion is based on management's analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors for each security type in our portfolio. The unrealized losses on available for sale securities are generally due to increases in market interest rates. Furthermore, the Company has the intent to hold the available for sale securities until maturity or a forecasted recovery, and it is more likely than not that the Company will not have to sell the securities before the recovery of their cost basis. As such, there is no allowance for credit losses on available for sale securities recognized as of June 30, 2022 . The Company's held to maturity securities include taxable and tax-exempt municipal securities issued primarily by school districts, utility districts and municipalities. With regard to securities issued by state and municipal subdivisions, management considers issuer bond ratings, historical loss rates for given bond ratings, whether issuers continue to make timely principal and interest payments under the contractual terms of the securities, internal forecasts and whether or not such securities are guaranteed. A significant portion of the Company's held to maturity securities are guaranteed or insured. Furthermore, as of June 30, 2022 , there were no past due principal or interest payments associated with these securities. As such, no allowance for credit losses has been recorded on held to maturity securities as of June 30, 2022 .

Loans, Net and Allowance for Cr

Loans, Net and Allowance for Credit Losses on Loans	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Loans, Net and Allowance for Loan Losses	Note 4. Loans, Net and Allowance for Credit Losses on Loans Loans, net, at June 30, 2022 and December 31, 2021, consisted of the following: June 30, December 31, 2022 2021 Commercial $ 2,153,514 $ 1,983,886 Mortgage warehouse purchase loans 538,190 788,848 Real estate: Commercial 7,405,015 6,617,455 Commercial construction, land and land development 1,293,252 1,180,181 Residential 1,470,252 1,300,122 Single-family interim construction 457,168 380,627 Agricultural 120,126 106,512 Consumer 80,611 81,815 Total loans (1)(2) 13,518,128 12,439,446 Allowance for credit losses (144,170) (148,706) Total loans, net (2) $ 13,373,958 $ 12,290,740 ____________ (1) Loan class amounts are shown at amortized cost, net of deferred loan fees of $14,171 and $9,406, at June 30, 2022 and December 31, 2021, respectively. (2) Excludes accrued interest receivable of $41,312 and $41,051 at June 30, 2022 and December 31, 2021, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. Loans with carrying amounts of $6,915,737 and $6,769,353 at June 30, 2022 and December 31, 2021, respectively, were pledged to secure Federal Home Loan Bank borrowing capacity and Federal Reserve Bank discount window borrowing capacity. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and potential problem loans. Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. The Company’s management examines current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. These cash flows, however, may not be as expected and the value of collateral securing the loans may fluctuate. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. The commercial loan portfolio includes loans made to customers in the energy industry, which is a complex, technical and cyclical industry. Experienced bankers with specialized energy lending experience originate our energy loans. Companies in this industry produce, extract, develop, exploit and explore for oil and natural gas. Loans are primarily collateralized with proven producing oil and gas reserves based on a technical evaluation of these reserves. At June 30, 2022 and December 31, 2021, there were approximately $466,951 and $342,776, of energy related loans outstanding, respectively. With the passage of the CARES Act Paycheck Protection Program (PPP) in 2020, administered by the Small Business Administration (SBA), the Company participated by originating loans to its customers through the program. PPP loans have terms of two The Company has a mortgage warehouse purchase program providing mortgage inventory financing for residential mortgage loans originated by mortgage banker clients across a broad geographic scale. Proceeds from the sale of mortgages is the primary source of repayment for warehouse inventory financing via approved investor takeout commitments. These loans typically have a very short duration ranging between a few days to 15 days. In some cases, loans to larger mortgage originators may be financed for up to 60 days. Warehouse purchase program loans are collectively evaluated for impairment and are purchased under several contractual requirements, providing safeguards to the Company. To date, the Company has not experienced a loss on these loans and no allowance for credit losses has been allocated to them. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts, and the repayment of these loans is generally largely dependent on the successful operation of the property or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s commercial real estate portfolio are diverse in terms of type and geographic location. Management monitors the diversification of the portfolio on a quarterly basis by type and geographic location. Management also tracks the level of owner occupied property versus non-owner occupied property. At June 30, 2022, the portfolio consisted of approximately 23% of owner occupied property. Land and commercial land development loans are underwritten using feasibility studies, independent appraisal reviews and financial analysis of the developers or property owners. Generally, borrowers must have a proven track record of success. Commercial construction loans are generally based upon estimates of cost and value of the completed project. These estimates may not be accurate. Commercial construction loans often involve the disbursement of substantial funds with the repayment dependent on the success of the ultimate project. Sources of repayment for these loans may be pre-committed permanent financing or sale of the developed property. The loans in this portfolio are geographically diverse and due to the increased risk are monitored closely by management and the board of directors on a quarterly basis. Residential real estate and single-family interim construction loans are underwritten primarily based on borrowers’ documented income and ability to repay the Bank and other creditors as well as minimum collateral values and credit scores. Relatively small loan amounts are spread across many individual borrowers, which minimizes risk in the residential portfolio. In addition, management evaluates trends in past dues and current economic factors on a regular basis. Agricultural loans are collateralized by real estate and/or agricultural-related assets. Agricultural real estate loans are primarily comprised of loans for the purchase of farmland. Loan-to-value ratios on loans secured by farmland generally do not exceed 80% and have amortization periods limited to twenty years. Agricultural non-real estate loans are generally comprised of term loans to fund the purchase of equipment, livestock and seasonal operating lines to grain farmers to plant and harvest corn and soybeans. Specific underwriting standards have been established for agricultural-related loans including the establishment of projections for each operating year based on industry developed estimates of farm input costs and expected commodity yields and prices. Operating lines are typically written for one year and secured by the crop and other farm assets as considered necessary. Agricultural loans carry credit risks as they involve larger balances concentrated with single borrowers or groups of related borrowers. In addition, repayment of such loans depends on the successful operation or management of the farm property securing the loan or for which an operating loan is utilized. Farming operations may be affected by adverse weather conditions such as drought, hail or floods that can severely limit crop yields. Consumer loans represent less than 1% of the outstanding total loan portfolio. Collateral consists primarily of automobiles and other personal assets. Credit score analysis is used to supplement the underwriting process. Most of the Company’s lending activity occurs within the state of Texas, primarily in the north, central and southeast Texas regions and the state of Colorado, specifically along the Front Range area. As of June 30, 2022, loans in the Colorado region represented about 25% of the total portfolio. A large percentage of the Company’s portfolio consists of commercial and residential real estate loans. As of June 30, 2022 and December 31, 2021, there were no concentrations of loans related to a single industry in excess of 10% of total loans. On January 1, 2021, the Company adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) (ASC 326). Under ASC 326, the allowance for credit losses is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged-off against the allowance when they are deemed uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The amount of the allowance represents management's best estimate of current expected credit losses on loans considering available information relevant to assessing collectibility over the loans' contractual terms, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation that a troubled debt restructuring will be executed with an individual borrower, or the extension or renewal options are included in the borrower contract and are not unconditionally cancellable by the Company. The Company's allowance balance is estimated using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term as well as for changes in environmental conditions, such as changes in unemployment rates, gross domestic product, property values or other relevant factors. The Company utilizes Moody’s Analytics economic forecast scenarios and assigns probability weighting to those scenarios which best reflect management’s views on the economic forecast. The allowance for credit losses is measured on a collective basis for portfolios of loans when similar risk characteristics exist. Loans that do not share risk characteristics are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. For determining the appropriate allowance for credit losses on a collective basis, the loan portfolio is segmented into pools based upon similar risk characteristics and a lifetime loss-rate model is utilized. For modeling purposes, loan pools include: commercial and industrial, energy, commercial real estate - construction/land development, commercial real estate - owner occupied, commercial real estate - non-owner occupied, agricultural, residential real estate, HELOCs, single-family interim construction, and consumer. Management periodically reassesses each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. The measurement of expected credit losses is impacted by loan/borrower attributes and certain macroeconomic variables. Management has determined that they are reasonably able to forecast the macroeconomic variables used in the modeling processes with an acceptable degree of confidence for a total of two years then encompassing a reversion process whereby the forecasted macroeconomic variables are reverted to their historical mean utilizing a rational, systematic basis. Management qualitatively adjusts model results for risk factors that are not considered within the modeling processes but are nonetheless relevant in assessing the expected credit losses within the loan pools. These qualitative factor (Q-Factor) adjustments may increase or decrease management's estimate of expected credit losses by a calculated percentage or amount based upon the estimated level of risk. Loans exhibiting unique risk characteristics and requiring an individual evaluation are measured based on 1) the present value of expected future cash flows discounted at the loan's effective interest rate; 2) the loan's observable market price; or 3) the fair value of collateral if the loan is collateral dependent. Substantially all of the Company’s individually evaluated loans are measured at the fair value of the collateral. Management continually evaluates the allowance for credit losses based upon the factors noted above. Should any of the factors considered by management change, the Company’s estimate of credit losses could also change and would affect the level of future provision for credit losses. Portions of the allowance may be allocated for specific credits; however, the entire allowance is available for any credit that, in management’s judgment, should be charged off. While the calculation of the allowance for credit losses utilizes management’s best judgment and all the information available, the adequacy of the allowance for credit losses is dependent on a variety of factors beyond the Company’s control, including, among other things, the performance of the entire loan portfolio, the economy, changes in interest rates and the view of regulatory authorities towards loan classifications. Loans requiring an individual evaluation are generally identified at the servicing officer level based on review of weekly past due reports and/or the loan officer’s communication with borrowers. In addition, the status of past due loans are routinely discussed within each lending region as well as credit committee meetings to determine if classification is warranted. The Company’s internal loan review department has implemented an internal risk-based loan review process to identify potential internally classified loans that supplements the independent external loan review. External loan reviews cover a wide range of the loan portfolio, including large lending relationships, specifically targeted loan types, and if applicable recently acquired loan portfolios. These reviews include analysis of borrower’s financial condition, payment histories, review of loan documentation and collateral values to determine if a loan should be internally classified. Generally, once classified, an analysis is completed by the credit department to determine the amount of allocated allowance for credit loss required. Expected credit losses for collateral dependent loans, including loans where the borrower is experiencing financial difficulty but foreclosure is not probable, are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. The economy and other risk factors are minimized by the Company’s underwriting standards, which include the following principles: 1) financial strength of the borrower including strong earnings, high net worth, significant liquidity and acceptable debt to worth ratio, 2) managerial business competence, 3) ability to repay, 4) loan to value, 5) projected cash flow and 6) guarantor financial statements, as applicable. The following is a summary of the activity in the allowance for credit losses on loans by class for the three and six months ended June 30, 2022 and 2021: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Unallocated Total Three months ended June 30, 2022 Balance at beginning of period $ 50,485 $ 59,699 $ 25,104 $ 2,770 $ 7,749 $ 132 $ 374 $ — $ 146,313 Provision for credit losses 2,737 (2,881) (918) 344 1,476 (27) 17 — 748 Charge-offs (12) (2,972) — — — — — — (2,984) Recoveries 93 — — — — — — — 93 Balance at end of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ — $ 144,170 Six months ended June 30, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Provision for credit losses 3,652 (8,292) 325 928 2,003 (1) (67) — (1,452) Charge-offs (453) (2,972) — (6) — — (10) — (3,441) Recoveries 357 — — — — — — — 357 Balance at end of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ — $ 144,170 Three months ended June 30, 2021 Balance at beginning of period $ 48,863 $ 69,977 $ 33,596 $ 4,401 $ 8,328 $ 108 $ 554 $ — $ 165,827 Provision for loan losses 1,775 (2,081) (5,754) (763) (199) (22) (76) — (7,120) Charge-offs (3,684) (200) — — — — (50) — (3,934) Recoveries 3 — — — — — 15 — 18 Balance at end of period $ 46,957 $ 67,696 $ 27,842 $ 3,638 $ 8,129 $ 86 $ 443 $ — $ 154,791 Six months ended June 30, 2021 Balance at beginning of period $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820 Impact of adopting ASC 326 12,775 29,108 22,008 (2,255) 7,179 (178) (334) (423) 67,880 Initial allowance on loans purchased with credit deterioration 4,328 7,640 927 140 — — — — 13,035 Provision for credit losses 6,276 (5,375) (8,392) (1,033) (1,206) (73) 183 — (9,620) Charge-offs (3,754) (375) (126) — — — (125) — (4,380) Recoveries 21 — — — — — 35 — 56 Balance at end of period $ 46,957 $ 67,696 $ 27,842 $ 3,638 $ 8,129 $ 86 $ 443 $ — $ 154,791 The Company will charge-off that portion of any loan which management considers a loss. Commercial and real estate loans are generally considered for charge-off when exposure beyond collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition. The following table presents loans at amortized cost that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of June 30, 2022 and December 31, 2021: June 30, 2022 December 31, 2021 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 38,903 $ 13,721 $ 38,911 $ 15,958 Commercial real estate 24,249 11 24,683 1,553 Commercial construction, land and land development 1,312 525 1,350 562 Residential real estate — — — — Single-family Interim construction — — — — Agricultural — — — — Consumer — — — — $ 64,464 $ 14,257 $ 64,944 $ 18,073 Nonperforming loans by loan class at June 30, 2022 and December 31, 2021, at amortized cost, are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total June 30, 2022 Nonaccrual loans (1) $ 40,873 $ 25,504 $ 19 $ 1,379 $ — $ — $ 11 $ 67,786 Loans past due 90 days and still accruing 2 — — 499 — — — 501 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,448 — 156 — — — 1,604 $ 40,875 $ 26,952 $ 19 $ 2,034 $ — $ — $ 11 $ 69,891 December 31, 2021 Nonaccrual loans $ 36,802 $ 15,218 $ 23 $ 1,592 $ — $ — $ 38 $ 53,673 Loans past due 90 days and still accruing 187 — — 1,603 — — — 1,790 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,714 — 161 — — — 1,875 $ 36,989 $ 16,932 $ 23 $ 3,356 $ — $ — $ 38 $ 57,338 ____________ (1) There are $1,076 and $18 in loans on nonaccrual without an allowance for credit loss as of June 30, 2022 and December 31, 2021, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three and six months ended June 30, 2022 and 2021. The accrual of interest is discontinued on a loan when management believes that, after considering collection efforts and other factors, the borrower's financial condition is such that collection of interest is doubtful, as well as when required by regulatory provisions. Regulatory provisions would typically require the placement of a loan on non-accrual status if 1) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or 2) full payment of principal and interest is not expected. All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. Cash collections on nonaccrual loans are generally credited to the loan receivable balance, and no interest income is recognized on those loans until the principal balance has been collected. Loans are generally returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. The restructuring of a loan is considered a “troubled debt restructuring” (TDR) if both 1) the borrower is experiencing financial difficulties and 2) the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, principal forgiveness, extending amortization and other actions intended to minimize potential losses. Modifications primarily relate to extending the amortization periods of the loans and interest rate concessions. The modifications during the reported periods did not materially impact the Company’s determination of the allowance for credit losses. The amortized cost basis and recorded investment in troubled debt restructurings, including those on nonaccrual, was $2,605 and $2,918 as of June 30, 2022 and December 31, 2021, respectively. There were no loans modified under troubled debt restructurings during the three and six months ended June 30, 2022. Following is a summary of loans modified under troubled debt restructurings during the three and six months ended June 30, 2021: Commercial Commercial Commercial Construction, Residential Single-Family Agricultural Consumer Total Troubled debt restructurings during the three months ended June 30, 2021 Number of contracts 1 — — — — — 1 2 Pre-restructuring outstanding recorded investment $ 1,740 $ — $ — $ — $ — $ — $ 6 $ 1,746 Post-restructuring outstanding recorded investment $ 526 $ — $ — $ — $ — $ — $ 6 $ 532 Troubled debt restructurings during the six months ended June 30, 2021 Number of contracts 2 — — — — — 1 3 Pre-restructuring outstanding recorded investment $ 1,789 $ — $ — $ — $ — $ — $ 6 $ 1,795 Post-restructuring outstanding recorded investment $ 570 $ — $ — $ — $ — $ — $ 6 $ 576 At June 30, 2022 and 2021, there were no loans modified under troubled debt restructurings during the previous twelve month period that subsequently defaulted during the three and six months ended June 30, 2022 and 2021, respectively. At June 30, 2022 and 2021, the Company had no commitments to lend additional funds to any borrowers with loans whose terms have been modified under troubled debt restructurings. Under ASC Subtopic 310-40 and federal banking agencies interagency guidance, certain short-term loan modifications made on a good faith basis in response to COVID-19 (as defined by the guidance) are not considered TDRs. Additionally, under section 4013 of the CARES Act, and as amended, banks may elect to suspend the requirement for certain loan modifications to be categorized as a TDR. In response to the COVID-19 pandemic, the Company has implemented prudent modifications allowing for primarily short-term payment deferrals or other payment relief to borrowers with pandemic-related economic hardships, where appropriate, that complies with the above guidance. As such, the Company's TDR loans noted above do not include loans that are modifications to borrowers impacted by COVID-19. As of June 30, 2022, the amount of loans remaining in COVID-19 related deferment was not significant. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents information regarding the aging of past due loans by loan class as of June 30, 2022 and as of December 31, 2021 (at amortized cost): Loans Loans Total Past Current Total June 30, 2022 Commercial $ 2,486 $ 13,545 $ 16,031 $ 2,137,483 $ 2,153,514 Mortgage warehouse — — — 538,190 538,190 Commercial real estate 6,031 12,053 18,084 7,386,931 7,405,015 Commercial construction, land and land development 443 — 443 1,292,809 1,293,252 Residential real estate 1,972 995 2,967 1,467,285 1,470,252 Single-family interim construction 2,204 — 2,204 454,964 457,168 Agricultural — — — 120,126 120,126 Consumer 109 11 120 80,491 80,611 $ 13,245 $ 26,604 $ 39,849 $ 13,478,279 $ 13,518,128 December 31, 2021 Commercial $ 1,041 $ 11,056 $ 12,097 $ 1,971,789 $ 1,983,886 Mortgage warehouse — — — 788,848 788,848 Commercial real estate 2,861 11,784 14,645 6,602,810 6,617,455 Commercial construction, land and land development — — — 1,180,181 1,180,181 Residential real estate 3,838 1,913 5,751 1,294,371 1,300,122 Single-family interim construction 1,290 — 1,290 379,337 380,627 Agricultural 16 — 16 106,496 106,512 Consumer 216 9 225 81,590 81,815 $ 9,262 $ 24,762 $ 34,024 $ 12,405,422 $ 12,439,446 The Company’s internal classified report is segregated into the following categories: 1) Pass/Watch, 2) Special Mention, 3) Substandard, 4) Doubtful and 5) Loss. The loans placed in the Pass/Watch category reflect the Company’s opinion that the loans reflect potential weakness that requires monitoring on a more frequent basis. The loans in the Special Mention category reflect the Company’s opinion that the credit contains weaknesses which represent a greater degree of risk and warrant extra attention. These loans are reviewed monthly by officers and senior management to determine if a change in category is warranted. The loans placed in the Substandard category are considered to be potentially inadequately protected by the current debt service capacity of the borrower and/or the pledged collateral. These credits, even if apparently protected by collateral value, have shown weakness related to adverse financial, managerial, economic, market or political conditions, which may jeopardize repayment of principal and interest and may be considered impaired. There is a possibility that some future loss could be sustained by the Company if such weakness is not corrected. The Doubtful category includes loans that are in default or principal exposure is probable and the possibility of loss is extremely high. The Loss category includes loans that are considered uncollectible, with little chance of turnaround. Management considers the guidance in ASC 310-20 when determining whether a modification, extension or renewal of a loan constitutes a current period origination. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of June 30, 2022 and December 31, 2021: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 230,425 $ 368,056 $ 160,681 $ 150,671 $ 62,296 $ 170,806 $ 895,221 $ 1,502 $ 2,039,658 Pass/Watch — 8,947 840 370 1,928 2,225 19,142 7 33,459 Special Mention — 280 109 64 — 4,608 1,375 — 6,436 Substandard 1,843 24,602 509 10,962 58 9,948 16,775 — 64,697 Doubtful — — — — — — 9,264 — 9,264 Loss — — — — — — — — — Total commercial $ 232,268 $ 401,885 $ 162,139 $ 162,067 $ 64,282 $ 187,587 $ 941,777 $ 1,509 $ 2,153,514 Mortgage warehouse Pass $ 538,190 $ — $ — $ — $ — $ — $ — $ — $ 538,190 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse $ 538,190 $ — $ — $ — $ — $ — $ — $ — $ 538,190 Commercial real estate Pass $ 1,807,180 $ 2,037,554 $ 1,049,647 $ 683,214 $ 535,087 $ 820,778 $ 67,706 $ 8,629 $ 7,009,795 Pass/Watch 31,063 44,166 22,710 16,498 59,934 67,137 — — 241,508 Special Mention 10,656 41,757 8,349 10,093 7,412 24,253 — 30 102,550 Substandard 2,831 33,488 412 637 11,721 2,073 — — 51,162 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 1,851,730 $ 2,156,965 $ 1,081,118 $ 710,442 $ 614,154 $ 914,241 $ 67,706 $ 8,659 $ 7,405,015 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Commercial construction, land and land development Pass $ 307,601 $ 588,346 $ 199,405 $ 60,334 $ 43,431 $ 17,371 $ 16,145 $ 286 $ 1,232,919 Pass/Watch 17,896 49 9,908 — — 78 — — 27,931 Special Mention 4,497 — — — — — — — 4,497 Substandard 11,551 14,790 — 234 — 1,330 — — 27,905 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 341,545 $ 603,185 $ 209,313 $ 60,568 $ 43,431 $ 18,779 $ 16,145 $ 286 $ 1,293,252 Residential real estate Pass $ 343,582 $ 375,398 $ 239,765 $ 166,209 $ 86,525 $ 187,483 $ 54,992 $ 249 $ 1,454,203 Pass/Watch 2,300 968 659 1,460 37 2,617 471 — 8,512 Special Mention — — — 704 240 1,142 125 — 2,211 Substandard 118 916 354 433 53 3,345 107 — 5,326 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 346,000 $ 377,282 $ 240,778 $ 168,806 $ 86,855 $ 194,587 $ 55,695 $ 249 $ 1,470,252 Single-family interim construction Pass $ 179,685 $ 225,505 $ 31,165 $ — $ 277 $ — $ 20,536 $ — $ 457,168 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 179,685 $ 225,505 $ 31,165 $ — $ 277 $ — $ 20,536 $ — $ 457,168 Agricultural Pass $ 44,335 $ 26,854 $ 14,665 $ 3,838 $ 6,605 $ 9,440 $ 11,060 $ — $ 116,797 Pass/Watch — — 526 1,299 26 — 1,457 — 3,308 Special Mention — — — — — — — — — Substandard — — — — — 21 — — 21 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 44,335 $ 26,854 $ 15,191 $ 5,137 $ 6,631 $ 9,461 $ 12,517 $ — $ 120,126 Consumer Pass $ 4,294 $ 7,975 $ 9,158 $ 2,354 $ 397 $ 160 $ 56,250 $ — $ 80,588 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 5 — — — 18 — — 23 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 4,294 $ 7,980 $ 9,158 $ 2,354 $ 397 $ 178 $ 56,250 $ — $ 80,611 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Total loans Pass $ 3,455,292 $ 3,629,688 $ 1,704,486 $ 1,066,620 $ 734,618 $ 1,206,038 $ 1,121,910 $ 10,666 $ 12,929,318 Pass/Watch 51,259 54,130 34,643 19,627 61,925 72,057 21,070 7 314,718 Special Mention 15,153 42,037 8,458 10,861 7,652 30,003 1,500 30 115,694 Substandard 16,343 73,801 1,275 12,266 11,832 16,735 16,882 — 149,134 Doubtful — — — — — — 9,264 — 9,264 Loss — — — — — — — — — Total loans $ 3,538,047 $ 3,799,656 $ 1,748,862 $ 1,109,374 $ 816,027 $ 1,324,833 $ 1,170,626 $ 10,703 $ 13,518,128 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial Pass $ 422,810 $ 183,433 $ 98,059 $ 78,357 $ 81,620 $ 255,213 $ 690,242 $ 5,231 $ 1,814,965 Pass/Watch 260 3,010 1,019 3,135 11,688 65 18,768 3,319 41,264 Special Mention 1,411 117 8,517 7,244 195 4,571 12,885 — 34,940 Substandard 30,277 605 16,041 94 2,478 18,331 13,006 1,988 82,820 Doubtful — — — — — — 9,897 — 9,897 Total commercial $ 454,758 $ 187,165 $ 123,636 $ 88,830 $ 95,981 $ 278,180 $ 744,798 $ 10,538 $ 1,983,886 Mortgage warehouse Pass $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total mortgage warehouse $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Commercial real estate Pass $ 2,181,292 $ 1,198,508 $ 830,902 $ 645,470 $ 504,126 $ 626,292 $ 71,850 $ 4,320 $ 6,062,760 Pass/Watch 54,671 18,591 39,045 60,955 30,196 74,762 752 1,319 280,291 Special Mention 56,142 16,770 37,331 29,962 17,649 20,100 — — 177,954 Substandard 36,263 16,118 1,136 11,901 281 29,686 1,065 — 96,450 Doubtful — — — — — — — — — Total commercial real estate $ 2,328,368 $ 1,249,987 $ 908,414 $ 748,288 $ 552,252 $ 750,840 $ 73,667 $ 5,639 $ 6,617,455 Commercial construction, land and land development Pass $ 618,288 $ 262,136 $ 98,007 $ 85,596 $ 13,751 $ 14,939 $ 18,586 $ — $ 1,111,303 Pass/Watch 17,899 10,459 6,

Off-Balance Sheet Arrangements,

Off-Balance Sheet Arrangements, Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Arrangements, Commitments and Contingencies	Note 5. Off-Balance Sheet Arrangements, Commitments and Contingencies 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. The commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the balance sheet. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of this instrument. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. At June 30, 2022 and December 31, 2021, the approximate amounts of these financial instruments were as follows: June 30, December 31, 2022 2021 Commitments to extend credit $ 3,207,302 $ 2,770,036 Standby letters of credit 29,811 30,007 $ 3,237,113 $ 2,800,043 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 are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained if deemed necessary by the Company upon extension of credit is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, farm crops, property, plant and equipment and income-producing commercial properties. Letters of credit are written conditional commitments used by the Company to guarantee the performance of a customer to a third party. The Company’s policies generally require that letter of credit arrangements contain security and debt covenants similar to those contained in loan arrangements. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount shown in the table above. If the commitment is funded, the Company would be entitled to seek recovery from the customer. Allowance For Credit Losses on Off-Balance Sheet Credit Exposures The allowance for credit losses on off-balance-sheet credit exposures is calculated under ASC 326, representing expected credit losses over the contractual period for which the Company is exposed to credit risk resulting from a contractual obligation to extend credit. Off-balance sheet credit exposures primarily consist of amounts available under outstanding lines of credit and letters of credit detailed in the table above. The allowance for credit losses on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date using the same methodologies as portfolio loans, taking into consideration the likelihood that funding will occur based on historical utilization rates. The allowance is included in other liabilities on the Company’s consolidated balance sheets. The allowance for credit lo sses on off-balance sheet commitments was as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Balance at beginning of period $ 5,479 $ 1,113 $ 4,722 $ — Impact of ASC 326 adoption — — — 1,113 Provision for off-balance sheet credit exposure (748) 620 9 620 Balance at end of period $ 4,731 $ 1,733 $ 4,731 $ 1,733 Litigation The Company is involved in certain legal actions arising from normal business activities. Management believes that the outcome of such proceedings will not materially affect the financial position, results of operations or cash flows of the Company. A legal proceeding that the Company believes could become material is described below. The Bank is a party to a legal proceeding inherited in connection with its acquisition of BOH Holdings, Inc. and its subsidiary, Bank of Houston (BOH). The plaintiffs in the case are alleging that the Bank aided and abetted or participated in a fraudulent scheme. The Bank is pursuing insurance coverage for these claims, including reimbursement for defense costs. The Company believes the claims made in this lawsuit are without merit and is vigorously defending the lawsuit. The Company is unable to predict when the matter will be resolved, the ultimate outcome or potential costs or damages to be incurred.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 6. Income Taxes Income tax expense for the three and six months ended June 30, 2022 and 2021 was as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Income tax expense for the period $ 13,591 $ 15,467 $ 25,870 $ 31,212 Effective tax rate 20.6 % 21.0 % 20.1 % 20.9 %

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 7. Fair Value Measurements The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures , establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. See below and Note 8. Derivative Financial Instruments , for additional information. Assets and Liabilities Measured on a Recurring Basis The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of June 30, 2022 and December 31, 2021 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant June 30, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 244,650 $ — $ 244,650 $ — Government agency securities 416,708 — 416,708 — Obligations of state and municipal subdivisions 265,665 — 265,665 — Corporate bonds 44,211 — 44,211 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 873,948 — 873,948 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 23,885 — 23,885 — Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant Derivative financial instruments: Interest rate lock commitments 622 — 622 — Forward mortgage-backed securities trades 96 — 96 — Loan customer counterparty 81 — 81 — Financial institution counterparty 9,616 — 9,616 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 8,411 — 8,411 — Interest rate lock commitments 10 — 10 — Forward mortgage-backed securities trades 102 — 102 — Loan customer counterparty 9,456 — 9,456 — Financial institution counterparty 95 — 95 — December 31, 2021 Assets: Investment securities available for sale: U.S. treasuries $ 174,996 $ — $ 174,996 $ — Government agency securities 444,675 — 444,675 — Obligations of state and municipal subdivisions 432,760 — 432,760 — Corporate bonds 34,796 — 34,796 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 918,550 — 918,550 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 28,249 — 28,249 — Derivative financial instruments: Interest rate lock commitments 1,029 — 1,029 — Forward mortgage-backed securities trades 27 — 27 — Loan customer counterparty 6,459 — 6,459 — Financial institution counterparty 1,078 — 1,078 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 1,158 — 1,158 — Interest rate lock commitments 4 — 4 — Forward mortgage-backed securities trades 21 — 21 — Loan customer counterparty 1,073 — 1,073 — Financial institution counterparty 6,772 — 6,772 — __________ (1) At June 30, 2022 and December 31, 2021, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $23,250 and $27,176, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at June 30, 2022. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted to credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of interest rate lock commitments is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 8, Derivative Financial Instruments , for more information. Assets and Liabilities Measured on a Nonrecurring Basis In accordance with ASC Topic 820, certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at June 30, 2022 and December 31, 2021, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended June 30, 2022 Assets: Individually evaluated loans $ 16,116 $ — $ — $ 16,116 $ (594) Other real estate owned 12,900 — — 12,900 2,361 December 31, 2021 Assets: Individually evaluated loans $ 11,204 $ — $ — $ 11,204 $ 3,526 Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Therefore, the Company has categorized its other real estate as Level 3. There was no other real estate owned remeasured during the year ended December 31, 2021. In addition, mortgage loans held for sale not recorded under the fair value option are required to be measured at the lower of cost or fair value. The fair value of these loans is based upon binding quotes or bids from third party investors. As of June 30, 2022 and December 31, 2021, all mortgage loans held for sale not recorded under the fair value option were recorded at cost. Fair Value of Financial Instruments not Recorded at Fair Value The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at June 30, 2022 and December 31, 2021: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant June 30, 2022 Financial assets: Cash and cash equivalents $ 776,131 $ 776,131 $ 776,131 $ — $ — Certificates of deposit held in other banks 1,265 1,265 — 1,265 — Investment securities held to maturity 207,972 167,479 — 167,479 — Loans held for sale, at cost 2,634 2,680 — 2,680 — Loans, net 13,373,958 13,355,782 — — 13,355,782 FHLB of Dallas stock and other restricted stock 18,495 18,495 — 18,495 — Accrued interest receivable 51,654 51,654 — 51,654 — Financial liabilities: Deposits 15,063,948 15,038,235 — 15,038,235 — Accrued interest payable 5,357 5,357 — 5,357 — FHLB advances 175,000 174,936 — 174,936 — Other borrowings 334,718 333,275 — 333,275 — Junior subordinated debentures 54,320 32,854 — 32,854 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2021 Financial assets: Cash and cash equivalents $ 2,608,444 $ 2,608,444 $ 2,608,444 $ — $ — Certificates of deposit held in other banks 3,245 3,246 — 3,246 — Loans held for sale, at cost 3,875 3,982 — 3,982 — Loans, net 12,290,740 12,415,366 — — 12,415,366 FHLB of Dallas stock and other restricted stock 21,573 21,573 — 21,573 — Accrued interest receivable 49,636 49,636 — 49,636 — Financial liabilities: Deposits 15,553,908 15,553,645 — 15,553,645 — Accrued interest payable 5,301 5,301 — 5,301 — FHLB advances 150,000 128,555 — 128,555 — Other borrowings 283,371 303,250 — 303,250 — Junior subordinated debentures 54,221 45,501 — 45,501 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures are based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 8. Derivative Financial Instruments The Company accounts for its derivative financial instruments in accordance with ASC Topic 815 which requires all derivative instruments to be carried at fair value on the balance sheet. The Company has designated certain derivative instruments used to manage interest rate risk as hedge relationships with certain assets, liabilities or cash flows being hedged. Certain derivatives used for interest rate risk management are not designated in a hedge relationship and are used for asset and liability management related to the Company's mortgage banking activities and commercial customers' financing needs. All derivatives are carried at fair value in either other assets or other liabilities. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. The Company formally documents the relationship between derivatives and hedged items, as well as the risk management objective and the strategy for undertaking hedge transactions at the inception of the hedge relationship. This documentation includes linking the fair value of cash flow hedges to the specific assets and liabilities on the balance sheet or the specific firm commitments or forecasted transaction. The Company assesses, both at the hedge's inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Company discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. The Company's objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of fixed-rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. During the second quarter of 2021, the Company entered into two interest rate swap derivatives with an aggregated notional amount of $100,000 that were designated as cash flow hedges. The derivatives are intended to hedge the variable cash flows associated with certain existing variable-interest rate loans and were determined to be effective during the three and six months ended June 30, 2022. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period that the hedged transaction affects earnings. Amounts of loss recognized in accumulated other comprehensive income (loss) related to derivatives was $1,623 and $5,546, net of tax, and the amounts of gains that were reclassified to interest income as interest payments were received on the Company’s variable-rate loans was $32 and $192, net of tax, during and for the three and six months ended June 30, 2022, respectively. Amounts of gains recognized in accumulated other comprehensive income related to derivatives was $431, net of tax, and the amounts of gains that were reclassified to interest income as interest payments were received on the Company’s variable-rate loans was $124, net of tax, during and for both the three and six months ended June 30, 2021. During the next twelve months, the Company estimates that $2,123 will be reclassified as a decrease to interest income. Through its mortgage banking division, the Company enters into interest rate lock commitments with consumers to originate mortgage loans at a specified interest rate. These commitments, which contain fixed expiration dates, offer the borrower an interest rate guarantee provided the loan meets underwriting guidelines and closes within the timeframe established by the Company. The Company manages the changes in fair value associated with changes in interest rates related to interest rate lock commitments by using forward sold commitments known as forward mortgage-backed securities trades. These instruments are typically entered into at the time the interest rate lock commitment is made. The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. The interest rate swap derivative positions relate to transactions in which the Company enters into an interest rate swap with a customer, while at the same time entering into an offsetting interest rate swap with another financial institution. An interest rate swap transaction allows customers to effectively convert a variable rate loan to a fixed rate. In connection with each swap, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The following table provides the outstanding notional balances and fair values of outstanding derivative positions at June 30, 2022 and December 31, 2021: Outstanding Notional Balance Asset Derivative Liability Derivative June 30, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 8,411 Derivatives not designated as hedging instruments: Interest rate lock commitments 21,951 622 10 Forward mortgage-backed securities trades 24,250 96 102 Commercial loan interest rate swaps: Loan customer counterparty 210,857 81 9,456 Financial institution counterparty 210,857 9,616 95 December 31, 2021 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 1,158 Derivatives not designated as hedging instruments: Interest rate lock commitments 34,064 1,029 4 Forward mortgage-backed securities trades 30,500 27 21 Commercial loan interest rate swaps: Loan customer counterparty 254,935 6,459 1,073 Financial institution counterparty 254,935 1,078 6,772 The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate June 30, 2022 December 31, 2021 Received Paid Received Paid Loan customer counterparty 4.20 % 3.91 % 4.12 % 2.40 % The credit exposure related to interest rate swaps is limited to the net favorable value of all swaps by each counterparty, which was approximately $9,697 and $7,537 at June 30, 2022 and December 31, 2021, respectively. In some cases collateral may be required from the counterparties involved if the net value of the derivative instruments exceeds a nominal amount. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values. At June 30, 2022 and December 31, 2021, cash of $20,266 and $20,491 and securities of $2,958 and $3,168 were pledged as collateral for these derivatives, respectively. The Company has entered into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans in which the Company is either a participant or a lead bank. Risk participation agreements entered into as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution. The Company is party to no risk participation agreements as a participant bank at June 30, 2022. Risk participation agreements entered into as the lead bank provide credit protection to the Company should the borrower fail to perform on its interest rate derivative contract. The Company is party to one risk participation agreement as the lead bank having a notional amount of $9,217 at June 30, 2022. The changes in the fair value of interest rate lock commitments and the forward sales of mortgage-backed securities are recorded in mortgage banking revenue. These gains and losses were not attributable to instrument-specific credit risk. For commercial interest rate swaps, because the Company acts as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on the results of operations. A summary of derivative activity and the related impact on the consolidated statements of income for the three and six months ended June 30, 2022 and 2021 is as follows: Income Statement Location Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ 36 $ 154 $ 233 $ 154 Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue (32) (40) (413) (1,449) Forward mortgage-backed securities trades Mortgage banking revenue (459) (838) (12) 508

Stock Awards

Stock Awards	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Stock Awards	Note 9. Stock Awards The Company grants common stock awards to certain employees of the Company. In May 2022, the shareholders of the Company approved a new 2022 Equity Incentive Plan (2022 Plan). Under this plan, the Compensation Committee may grant awards to certain employees of the Company in the form of restricted stock, restricted stock units, stock appreciation rights, qualified and nonqualified stock options, performance share awards and other equity-based awards. Effective with the adoption of the 2022 Plan, no further awards will be granted under the prior 2013 Equity Incentive Plan (2013 Plan). Awards outstanding under the 2013 Plan will remain in effect under the prior plan according to their respective terms and any terminated 2013 Plan awards will be available for awards under the 2022 Plan in accordance with the 2022 Plan's provisions. The 2022 Plan has 1,500,000 reserved shares of common stock to be awarded by the Company’s Compensation Committee. As of June 30, 2022, there were 1,493,000 shares remaining available for grant for future awards. Shares issued under these plans are restricted stock awards and performance stock units at target award level. Restricted stock awarded to employees generally vest evenly over the required employment period and range from one three four Restricted Stock Awards The following table summarizes the activity in nonvested restricted stock awards for the six months ended June 30, 2022 and 2021: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 84,284 73.80 Vested during the period (106,199) 59.80 Forfeited during the period (4,546) 53.61 Nonvested shares, June 30, 2022 337,090 $ 56.20 Nonvested shares, December 31, 2020 468,800 $ 49.01 Granted during the period 91,041 64.60 Vested during the period (114,961) 56.65 Forfeited during the period (22,327) 49.06 Nonvested shares, June 30, 2021 422,553 $ 50.23 Compensation expense related to these awards is recorded based on the fair value of the award at the date of grant and totaled $2,542 and $4,568 for the three and six months ended June 30, 2022, respectively, and $2,030 and $4,526 for the three and six months ended June 30, 2021, respectively. Compensation expense is recorded in salaries and employee benefits in the accompanying consolidated statements of income. At June 30, 2022, future compensation expense is estimated to be $14,108 and will be recognized over a remaining weighted average period of 2.20 years. The fair value of common stock awards that vested during the six months ended June 30, 2022 and 2021 was $7,985 and $7,538, respectively. The Company has recorded $2 and $(352) in excess tax expense (benefit) on vested restricted stock to income tax expense for the three and six months ended June 30, 2022, respectively, and $32 and $226 in excess tax expense for the three and six months ended June 30, 2021, respectively. There were no modifications of stock agreements during the six months ended June 30, 2022 and 2021 that resulted in significant additional incremental compensation costs. At June 30, 2022, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 149,432 Second year 102,301 Third year 78,219 Fourth year 7,138 Total nonvested shares 337,090 Performance Stock Units Performance stock units represent shares potentially issuable in the future. The number of shares issued is based upon the measure of the Company's achievement of its relative adjusted return on average tangible common equity, as defined by the Company, over the award's performance period as compared to an identified peer group's achievement over the same performance period. The number of shares issuable under each performance award is the product of the award target and the award payout percentage for the given level of achievement which ranges from 0% to 150% of the target. The following table summarizes the activity in nonvested performance stock units at target award level for the six months ended June 30, 2022 and 2021: Performance-based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, June 30, 2022 135,240 $ 48.53 Nonvested shares, December 31, 2020 89,300 $ 38.29 Granted during the period 20,198 62.58 Nonvested shares, June 30, 2021 109,498 $ 42.77 Compensation expense related to performance stock units is estimated each period based on the fair value of the target stock unit at the grant date and the most probable level of achievement of the performance condition, adjusted for the passage of time within the vesting periods of the awards. Compensation expense related to these awards was $867 and $1,253 for the three and six months ended June 30, 2022, respectively, and $318 and $1,028 for the three and six months ended June 30, 2021, respectively. As of June 30, 2022, the unrecognized compensation expense assuming the target attainment is estimated to be $3,771, while the estimated maximum payout rate is $7,137 . The remaining performance period over which the expense will be recognized is 2.23 years.

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
Regulatory Matters	Note 10. Regulatory Matters Under banking law, there are legal restrictions limiting the amount of dividends the Bank can declare. Approval of the regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. For state banks, subject to regulatory capital requirements, payment of dividends is generally allowed to the extent of net profits. The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Tier 2 capital for the Company includes permissible portions of the Company's subordinated notes. The permissible portion of qualified subordinated notes decreases 20% per year during the final five years of the term of the notes. The Company is subject to the Basel III regulatory capital framework (the Basel III Capital Rules). The Basel III Capital Rules require that the Company maintain a 2.5% capital conservation buffer above the minimum risk-based capital adequacy requirements. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure to meet the full amount of the buffer will result in restrictions on the Company's ability to make capital distributions, including dividend payments and stock repurchases and to pay discretionary bonuses to executive officers. In February 2019, the federal bank regulatory agencies issued a final rule that revised certain capital regulations under ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and included a transition option that allows banking organizations to phase in, over a three year period, the day one adverse effects of adoption on their regulatory capital ratios (three year transition option). In connection with the adoption of ASC 326 on January 1, 2021, the Company recognized an after-tax cumulative effect reduction to retained earnings. The Company elected to adopt the three year transition option and the deferral has been applied in capital ratios presented below. 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, Common Equity Tier 1 (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 June 30, 2022 and December 31, 2021, the Company and the Bank meet all capital adequacy requirements to which they are subject, including the capital buffer requirement. As of June 30, 2022 and December 31, 2021, 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 Bank must maintain minimum total risk based, CET1, Tier 1 risk based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events that management believes have changed the Bank’s category. The following table presents actual capital amounts and required ratios under Basel III Capital Rules for the Company and Bank as of June 30, 2022 and December 31, 2021. Actual Minimum Capital To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2022 Total capital to risk weighted assets: Consolidated $ 1,879,564 12.24 % $ 1,612,860 10.50 % N/A N/A Bank 2,004,604 13.05 1,612,377 10.50 $ 1,535,597 10.00 % Tier 1 capital to risk weighted assets: Consolidated 1,562,775 10.17 1,305,648 8.50 N/A N/A Bank 1,891,815 12.32 1,305,257 8.50 1,228,478 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,507,175 9.81 1,075,240 7.00 N/A N/A Bank 1,891,815 12.32 1,074,918 7.00 998,138 6.50 Tier 1 capital to average assets: Consolidated 1,562,775 9.28 673,688 4.00 N/A N/A Bank 1,891,815 11.23 673,598 4.00 841,998 5.00 December 31, 2021 Total capital to risk weighted assets: Consolidated $ 1,916,163 13.67 % $ 1,471,510 10.50 % N/A N/A Bank 1,983,530 14.16 1,471,036 10.50 $ 1,400,987 10.00 % Tier 1 capital to risk weighted assets: Consolidated 1,614,372 11.52 1,191,223 8.50 N/A N/A Bank 1,885,739 13.46 1,190,839 8.50 1,120,790 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,772 11.12 981,007 7.00 N/A N/A Bank 1,885,739 13.46 980,691 7.00 910,642 6.50 Tier 1 capital to average assets: Consolidated 1,614,372 8.80 733,954 4.00 N/A N/A Bank 1,885,739 10.28 733,785 4.00 917,231 5.00 Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In December 2021, the Company's Board established the 2022 Stock Repurchase Plan, which provides for the repurchase of up to $160,000 of common stock through December 31, 2022. Under this program, the Company repurchased 1,639,792 and 1,651,236 shares at a total cost of $115,153 and $115,966 for the three and six months ended June 30, 2022, respectively. There were no shares repurchased by the Company during the three and six months ended June 30, 2021 under a prior plan. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board.

Subsequent Event

Subsequent Event	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Event	Note 11. Subsequent Events Declaration of Dividends On July 22, 2022, the Company declared a quarterly cash dividend in the amo unt of $0.38 per shar e of common stock to the stockholders of record on August 4, 2022. The dividend will be paid on August 18, 2022.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation. The consolidated interim financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company's Annual Report on Form 10-K for the year ended December 31, 2021. The consolidated balance sheet at December 31, 2021 has been derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative.
Segment reporting	Segment reporting: The Company has one reportable segment. The Company’s chief operating decision-maker uses consolidated results to make operating and strategic decisions.
Reclassifications	Reclassifications: Certain prior period financial statement and disclosure amounts have been reclassified to conform to current period presentation. The reclassifications have no effect on net income or stockholders' equity as previously reported.
Use of estimates	Use of estimates: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Accordingly, actual results could differ from those estimates. The material estimates included in the financial statements relate to the allowance for credit losses, the valuation of goodwill and valuation of assets and liabilities acquired in business combinations.
Subsequent events	Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the Securities and Exchange Commission (SEC) and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 11. Subsequent Events .
Earnings per share	Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the three and six months ended June 30, 2022 and 2021. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price.
Allowance for Credit Losses on Loans	The Company's allowance balance is estimated using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term as well as for changes in environmental conditions, such as changes in unemployment rates, gross domestic product, property values or other relevant factors. The Company utilizes Moody’s Analytics economic forecast scenarios and assigns probability weighting to those scenarios which best reflect management’s views on the economic forecast.The allowance for credit losses is measured on a collective basis for portfolios of loans when similar risk characteristics exist. Loans that do not share risk characteristics are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. For determining the appropriate allowance for credit losses on a collective basis, the loan portfolio is segmented into pools based upon similar risk characteristics and a lifetime loss-rate model is utilized. For modeling purposes, loan pools include: commercial and industrial, energy, commercial real estate - construction/land development, commercial real estate - owner occupied, commercial real estate - non-owner occupied, agricultural, residential real estate, HELOCs, single-family interim construction, and consumer. Management periodically reassesses each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. The measurement of expected credit losses is impacted by loan/borrower attributes and certain macroeconomic variables. Management has determined that they are reasonably able to forecast the macroeconomic variables used in the modeling processes with an acceptable degree of confidence for a total of two years then encompassing a reversion process whereby the forecasted macroeconomic variables are reverted to their historical mean utilizing a rational, systematic basis. Management qualitatively adjusts model results for risk factors that are not considered within the modeling processes but are nonetheless relevant in assessing the expected credit losses within the loan pools. These qualitative factor (Q-Factor) adjustments may increase or decrease management's estimate of expected credit losses by a calculated percentage or amount based upon the estimated level of risk.
Loan charge-off amounts	The Company will charge-off that portion of any loan which management considers a loss. Commercial and real estate loans are generally considered for charge-off when exposure beyond collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition.
Nonaccrual loan and lease status	The accrual of interest is discontinued on a loan when management believes that, after considering collection efforts and other factors, the borrower's financial condition is such that collection of interest is doubtful, as well as when required by regulatory provisions. Regulatory provisions would typically require the placement of a loan on non-accrual status if 1) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or 2) full payment of principal and interest is not expected. All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. Cash collections on nonaccrual loans are generally credited to the loan receivable balance, and no interest income is recognized on those loans until the principal balance has been collected. Loans are generally returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Troubled debt restructuring	The restructuring of a loan is considered a “troubled debt restructuring” (TDR) if both 1) the borrower is experiencing financial difficulties and 2) the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, principal forgiveness, extending amortization and other actions intended to minimize potential losses. Modifications primarily relate to extending the amortization periods of the loans and interest rate concessions.
Loans past due	Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due.
Fair value measurements	The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures , establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. See below and Note 8. Derivative Financial Instruments , for additional information. Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted to credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of interest rate lock commitments is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 8, Derivative Financial Instruments , for more information. Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Therefore, the Company has categorized its other real estate as Level 3. There was no other real estate owned remeasured during the year ended December 31, 2021. The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures are based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.
Derivatives	Through its mortgage banking division, the Company enters into interest rate lock commitments with consumers to originate mortgage loans at a specified interest rate. These commitments, which contain fixed expiration dates, offer the borrower an interest rate guarantee provided the loan meets underwriting guidelines and closes within the timeframe established by the Company. The Company manages the changes in fair value associated with changes in interest rates related to interest rate lock commitments by using forward sold commitments known as forward mortgage-backed securities trades. These instruments are typically entered into at the time the interest rate lock commitment is made.The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. The interest rate swap derivative positions relate to transactions in which the Company enters into an interest rate swap with a customer, while at the same time entering into an offsetting interest rate swap with another financial institution. An interest rate swap transaction allows customers to effectively convert a variable rate loan to a fixed rate. In connection with each swap, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount.
Stock repurchase program	Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In December 2021, the Company's Board established the 2022 Stock Repurchase Plan, which provides for the repurchase of up to $160,000 of common stock through December 31, 2022. Under this program, the Company repurchased 1,639,792 and 1,651,236 shares at a total cost of $115,153 and $115,966 for the three and six months ended June 30, 2022, respectively. There were no shares repurchased by the Company during the three and six months ended June 30, 2021 under a prior plan. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Earning Per Share	The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Basic earnings per share: Net income $ 52,360 $ 58,243 $ 103,100 $ 118,223 Less: Undistributed earnings allocated to participating securities 297 444 566 931 Dividends paid on participating securities 129 138 256 272 Net income available to common shareholders $ 51,934 $ 57,661 $ 102,278 $ 117,020 Weighted average basic shares outstanding 41,397,584 42,756,162 41,913,218 42,743,877 Basic earnings per share $ 1.25 $ 1.35 $ 2.44 $ 2.74 Diluted earnings per share: Net income available to common shareholders $ 51,934 $ 57,661 $ 102,278 $ 117,020 Total weighted average basic shares outstanding 41,397,584 42,756,162 41,913,218 42,743,877 Add dilutive performance stock units 75,909 59,145 75,378 54,690 Total weighted average diluted shares outstanding 41,473,493 42,815,307 41,988,596 42,798,567 Diluted earnings per share $ 1.25 $ 1.35 $ 2.44 $ 2.73 Anti-dilutive participating securities 123,849 205,989 135,953 197,851

Statement of Cash Flows (Tables

Statement of Cash Flows (Tables)	6 Months Ended
	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Six Months Ended June 30, 2022 2021 Cash transactions: Interest expense paid $ 22,358 $ 35,130 Income taxes paid $ 15,038 $ 28,183 Noncash transactions: Deferred dividend equivalents $ 95 $ 117 Transfer of loans to other real estate owned $ 12,900 $ — Transfer of securities available for sale to held to maturity $ 117,583 $ — Right-of-use assets obtained in exchange for lease liabilities $ 4,012 $ 57 Loans purchased, not yet settled $ 30,298 $ 38,859

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities and Approximate Fair Values	The amortized cost of securities and their approximate fair values at June 30, 2022 and December 31, 2021 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale June 30, 2022 U.S. treasuries $ 260,417 $ — $ (15,767) $ 244,650 Government agency securities 479,869 10 (63,171) 416,708 Obligations of state and municipal subdivisions 277,289 446 (12,070) 265,665 Corporate bonds 46,997 9 (2,795) 44,211 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 982,676 38 (108,766) 873,948 Other securities 950 — — 950 $ 2,048,198 $ 503 $ (202,569) $ 1,846,132 December 31, 2021 U.S. treasuries $ 174,950 $ 724 $ (678) $ 174,996 Government agency securities 453,402 1,221 (9,948) 444,675 Obligations of state and municipal subdivisions 418,554 15,440 (1,234) 432,760 Corporate bonds 33,994 862 (60) 34,796 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 917,942 10,757 (10,149) 918,550 Other securities 950 — — 950 $ 1,999,792 $ 29,004 $ (22,069) $ 2,006,727 Securities Held to Maturity June 30, 2022 Obligations of state and municipal subdivisions $ 207,972 $ — $ (40,493) $ 167,479 ____________ (1) Excludes accrued interest receivable of $8,000 on available for sale and $2,338 on held to maturity securities at June 30, 2022 and $8,581 on available for sale securities at December 31, 2021 that is recorded in other assets on the accompanying consolidated balance sheets.
Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity	The amortized cost and estimated fair value of securities at June 30, 2022, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. June 30, 2022 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 39,472 $ 39,513 $ — $ — Due from one year to five years 334,871 321,689 — — Due from five to ten years 452,348 404,933 — — Thereafter 238,831 206,049 207,972 167,479 1,065,522 972,184 207,972 167,479 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 982,676 873,948 — — $ 2,048,198 $ 1,846,132 $ 207,972 $ 167,479 ____________ (1) Excludes accrued interest receivable of $8,000 on available for sale and $2,338 on held to maturity securities at June 30, 2022 that is recorded in other assets on the accompanying consolidated balance sheets.
Proceeds from Sale of Available for Sale Securities	Proceeds from sale of securities available for sale and gross gains and gross losses for the three and six months ended June 30, 2021 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2021 Proceeds from sale $ 181 $ 181 Gross gains $ — $ — Gross losses $ — $ —
Summary of Unrealized Losses and Fair Value Securities in Continuous Unrealized Loss Position	The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of June 30, 2022 and December 31, 2021, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale June 30, 2022 U.S. treasuries 36 $ 244,650 $ (15,767) — $ — $ — $ 244,650 $ (15,767) Government agency securities 48 268,923 (32,522) 28 139,028 (30,649) 407,951 (63,171) Obligations of state and municipal subdivisions 235 165,919 (12,070) — — — 165,919 (12,070) Corporate bonds 11 37,205 (2,795) — — — 37,205 (2,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 322 731,489 (82,869) 30 129,595 (25,897) 861,084 (108,766) 652 $ 1,448,186 $ (146,023) 58 $ 268,623 $ (56,546) $ 1,716,809 $ (202,569) December 31, 2021 U.S. treasuries 22 $ 144,172 $ (678) — $ — $ — $ 144,172 $ (678) Government agency securities 38 258,334 (4,622) 22 119,963 (5,326) 378,297 (9,948) Obligations of state and municipal subdivisions 14 47,200 (988) 2 3,555 (246) 50,755 (1,234) Corporate bonds 3 13,440 (60) — — — 13,440 (60) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 115 621,717 (8,471) 11 44,620 (1,678) 666,337 (10,149) 192 $ 1,084,863 $ (14,819) 35 $ 168,138 $ (7,250) $ 1,253,001 $ (22,069) Securities Held to Maturity June 30, 2022 Obligations of state and municipal subdivisions 38 $ 157,120 $ (37,314) 5 $ 10,359 $ (3,179) $ 167,479 $ (40,493)

Loans, Net and Allowance for _2

Loans, Net and Allowance for Credit Losses on Loans (Tables)	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Compositions of Loans	Loans, net, at June 30, 2022 and December 31, 2021, consisted of the following: June 30, December 31, 2022 2021 Commercial $ 2,153,514 $ 1,983,886 Mortgage warehouse purchase loans 538,190 788,848 Real estate: Commercial 7,405,015 6,617,455 Commercial construction, land and land development 1,293,252 1,180,181 Residential 1,470,252 1,300,122 Single-family interim construction 457,168 380,627 Agricultural 120,126 106,512 Consumer 80,611 81,815 Total loans (1)(2) 13,518,128 12,439,446 Allowance for credit losses (144,170) (148,706) Total loans, net (2) $ 13,373,958 $ 12,290,740 ____________ (1) Loan class amounts are shown at amortized cost, net of deferred loan fees of $14,171 and $9,406, at June 30, 2022 and December 31, 2021, respectively.
Summary of Activity in Allowance for Credit Losses by Loan Class	The following is a summary of the activity in the allowance for credit losses on loans by class for the three and six months ended June 30, 2022 and 2021: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Unallocated Total Three months ended June 30, 2022 Balance at beginning of period $ 50,485 $ 59,699 $ 25,104 $ 2,770 $ 7,749 $ 132 $ 374 $ — $ 146,313 Provision for credit losses 2,737 (2,881) (918) 344 1,476 (27) 17 — 748 Charge-offs (12) (2,972) — — — — — — (2,984) Recoveries 93 — — — — — — — 93 Balance at end of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ — $ 144,170 Six months ended June 30, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Provision for credit losses 3,652 (8,292) 325 928 2,003 (1) (67) — (1,452) Charge-offs (453) (2,972) — (6) — — (10) — (3,441) Recoveries 357 — — — — — — — 357 Balance at end of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ — $ 144,170 Three months ended June 30, 2021 Balance at beginning of period $ 48,863 $ 69,977 $ 33,596 $ 4,401 $ 8,328 $ 108 $ 554 $ — $ 165,827 Provision for loan losses 1,775 (2,081) (5,754) (763) (199) (22) (76) — (7,120) Charge-offs (3,684) (200) — — — — (50) — (3,934) Recoveries 3 — — — — — 15 — 18 Balance at end of period $ 46,957 $ 67,696 $ 27,842 $ 3,638 $ 8,129 $ 86 $ 443 $ — $ 154,791 Six months ended June 30, 2021 Balance at beginning of period $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820 Impact of adopting ASC 326 12,775 29,108 22,008 (2,255) 7,179 (178) (334) (423) 67,880 Initial allowance on loans purchased with credit deterioration 4,328 7,640 927 140 — — — — 13,035 Provision for credit losses 6,276 (5,375) (8,392) (1,033) (1,206) (73) 183 — (9,620) Charge-offs (3,754) (375) (126) — — — (125) — (4,380) Recoveries 21 — — — — — 35 — 56 Balance at end of period $ 46,957 $ 67,696 $ 27,842 $ 3,638 $ 8,129 $ 86 $ 443 $ — $ 154,791
Individually Evaluated Loans	The following table presents loans at amortized cost that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of June 30, 2022 and December 31, 2021: June 30, 2022 December 31, 2021 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 38,903 $ 13,721 $ 38,911 $ 15,958 Commercial real estate 24,249 11 24,683 1,553 Commercial construction, land and land development 1,312 525 1,350 562 Residential real estate — — — — Single-family Interim construction — — — — Agricultural — — — — Consumer — — — — $ 64,464 $ 14,257 $ 64,944 $ 18,073
Summary of Nonperforming Loans by Loan Class	Nonperforming loans by loan class at June 30, 2022 and December 31, 2021, at amortized cost, are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total June 30, 2022 Nonaccrual loans (1) $ 40,873 $ 25,504 $ 19 $ 1,379 $ — $ — $ 11 $ 67,786 Loans past due 90 days and still accruing 2 — — 499 — — — 501 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,448 — 156 — — — 1,604 $ 40,875 $ 26,952 $ 19 $ 2,034 $ — $ — $ 11 $ 69,891 December 31, 2021 Nonaccrual loans $ 36,802 $ 15,218 $ 23 $ 1,592 $ — $ — $ 38 $ 53,673 Loans past due 90 days and still accruing 187 — — 1,603 — — — 1,790 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,714 — 161 — — — 1,875 $ 36,989 $ 16,932 $ 23 $ 3,356 $ — $ — $ 38 $ 57,338 ____________ (1) There are $1,076 and $18 in loans on nonaccrual without an allowance for credit loss as of June 30, 2022 and December 31, 2021, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three and six months ended June 30, 2022 and 2021.
Summary of Troubled Debt Restructurings	Following is a summary of loans modified under troubled debt restructurings during the three and six months ended June 30, 2021: Commercial Commercial Commercial Construction, Residential Single-Family Agricultural Consumer Total Troubled debt restructurings during the three months ended June 30, 2021 Number of contracts 1 — — — — — 1 2 Pre-restructuring outstanding recorded investment $ 1,740 $ — $ — $ — $ — $ — $ 6 $ 1,746 Post-restructuring outstanding recorded investment $ 526 $ — $ — $ — $ — $ — $ 6 $ 532 Troubled debt restructurings during the six months ended June 30, 2021 Number of contracts 2 — — — — — 1 3 Pre-restructuring outstanding recorded investment $ 1,789 $ — $ — $ — $ — $ — $ 6 $ 1,795 Post-restructuring outstanding recorded investment $ 570 $ — $ — $ — $ — $ — $ 6 $ 576
Aging of Past Due Loans by Loan Class	The following table presents information regarding the aging of past due loans by loan class as of June 30, 2022 and as of December 31, 2021 (at amortized cost): Loans Loans Total Past Current Total June 30, 2022 Commercial $ 2,486 $ 13,545 $ 16,031 $ 2,137,483 $ 2,153,514 Mortgage warehouse — — — 538,190 538,190 Commercial real estate 6,031 12,053 18,084 7,386,931 7,405,015 Commercial construction, land and land development 443 — 443 1,292,809 1,293,252 Residential real estate 1,972 995 2,967 1,467,285 1,470,252 Single-family interim construction 2,204 — 2,204 454,964 457,168 Agricultural — — — 120,126 120,126 Consumer 109 11 120 80,491 80,611 $ 13,245 $ 26,604 $ 39,849 $ 13,478,279 $ 13,518,128 December 31, 2021 Commercial $ 1,041 $ 11,056 $ 12,097 $ 1,971,789 $ 1,983,886 Mortgage warehouse — — — 788,848 788,848 Commercial real estate 2,861 11,784 14,645 6,602,810 6,617,455 Commercial construction, land and land development — — — 1,180,181 1,180,181 Residential real estate 3,838 1,913 5,751 1,294,371 1,300,122 Single-family interim construction 1,290 — 1,290 379,337 380,627 Agricultural 16 — 16 106,496 106,512 Consumer 216 9 225 81,590 81,815 $ 9,262 $ 24,762 $ 34,024 $ 12,405,422 $ 12,439,446
Summary of Loans by Credit Quality Indicator by Class	The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of June 30, 2022 and December 31, 2021: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 230,425 $ 368,056 $ 160,681 $ 150,671 $ 62,296 $ 170,806 $ 895,221 $ 1,502 $ 2,039,658 Pass/Watch — 8,947 840 370 1,928 2,225 19,142 7 33,459 Special Mention — 280 109 64 — 4,608 1,375 — 6,436 Substandard 1,843 24,602 509 10,962 58 9,948 16,775 — 64,697 Doubtful — — — — — — 9,264 — 9,264 Loss — — — — — — — — — Total commercial $ 232,268 $ 401,885 $ 162,139 $ 162,067 $ 64,282 $ 187,587 $ 941,777 $ 1,509 $ 2,153,514 Mortgage warehouse Pass $ 538,190 $ — $ — $ — $ — $ — $ — $ — $ 538,190 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse $ 538,190 $ — $ — $ — $ — $ — $ — $ — $ 538,190 Commercial real estate Pass $ 1,807,180 $ 2,037,554 $ 1,049,647 $ 683,214 $ 535,087 $ 820,778 $ 67,706 $ 8,629 $ 7,009,795 Pass/Watch 31,063 44,166 22,710 16,498 59,934 67,137 — — 241,508 Special Mention 10,656 41,757 8,349 10,093 7,412 24,253 — 30 102,550 Substandard 2,831 33,488 412 637 11,721 2,073 — — 51,162 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 1,851,730 $ 2,156,965 $ 1,081,118 $ 710,442 $ 614,154 $ 914,241 $ 67,706 $ 8,659 $ 7,405,015 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Commercial construction, land and land development Pass $ 307,601 $ 588,346 $ 199,405 $ 60,334 $ 43,431 $ 17,371 $ 16,145 $ 286 $ 1,232,919 Pass/Watch 17,896 49 9,908 — — 78 — — 27,931 Special Mention 4,497 — — — — — — — 4,497 Substandard 11,551 14,790 — 234 — 1,330 — — 27,905 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 341,545 $ 603,185 $ 209,313 $ 60,568 $ 43,431 $ 18,779 $ 16,145 $ 286 $ 1,293,252 Residential real estate Pass $ 343,582 $ 375,398 $ 239,765 $ 166,209 $ 86,525 $ 187,483 $ 54,992 $ 249 $ 1,454,203 Pass/Watch 2,300 968 659 1,460 37 2,617 471 — 8,512 Special Mention — — — 704 240 1,142 125 — 2,211 Substandard 118 916 354 433 53 3,345 107 — 5,326 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 346,000 $ 377,282 $ 240,778 $ 168,806 $ 86,855 $ 194,587 $ 55,695 $ 249 $ 1,470,252 Single-family interim construction Pass $ 179,685 $ 225,505 $ 31,165 $ — $ 277 $ — $ 20,536 $ — $ 457,168 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 179,685 $ 225,505 $ 31,165 $ — $ 277 $ — $ 20,536 $ — $ 457,168 Agricultural Pass $ 44,335 $ 26,854 $ 14,665 $ 3,838 $ 6,605 $ 9,440 $ 11,060 $ — $ 116,797 Pass/Watch — — 526 1,299 26 — 1,457 — 3,308 Special Mention — — — — — — — — — Substandard — — — — — 21 — — 21 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 44,335 $ 26,854 $ 15,191 $ 5,137 $ 6,631 $ 9,461 $ 12,517 $ — $ 120,126 Consumer Pass $ 4,294 $ 7,975 $ 9,158 $ 2,354 $ 397 $ 160 $ 56,250 $ — $ 80,588 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 5 — — — 18 — — 23 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 4,294 $ 7,980 $ 9,158 $ 2,354 $ 397 $ 178 $ 56,250 $ — $ 80,611 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans June 30, 2022 2022 2021 2020 2019 2018 Prior Total Total loans Pass $ 3,455,292 $ 3,629,688 $ 1,704,486 $ 1,066,620 $ 734,618 $ 1,206,038 $ 1,121,910 $ 10,666 $ 12,929,318 Pass/Watch 51,259 54,130 34,643 19,627 61,925 72,057 21,070 7 314,718 Special Mention 15,153 42,037 8,458 10,861 7,652 30,003 1,500 30 115,694 Substandard 16,343 73,801 1,275 12,266 11,832 16,735 16,882 — 149,134 Doubtful — — — — — — 9,264 — 9,264 Loss — — — — — — — — — Total loans $ 3,538,047 $ 3,799,656 $ 1,748,862 $ 1,109,374 $ 816,027 $ 1,324,833 $ 1,170,626 $ 10,703 $ 13,518,128 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial Pass $ 422,810 $ 183,433 $ 98,059 $ 78,357 $ 81,620 $ 255,213 $ 690,242 $ 5,231 $ 1,814,965 Pass/Watch 260 3,010 1,019 3,135 11,688 65 18,768 3,319 41,264 Special Mention 1,411 117 8,517 7,244 195 4,571 12,885 — 34,940 Substandard 30,277 605 16,041 94 2,478 18,331 13,006 1,988 82,820 Doubtful — — — — — — 9,897 — 9,897 Total commercial $ 454,758 $ 187,165 $ 123,636 $ 88,830 $ 95,981 $ 278,180 $ 744,798 $ 10,538 $ 1,983,886 Mortgage warehouse Pass $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total mortgage warehouse $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Commercial real estate Pass $ 2,181,292 $ 1,198,508 $ 830,902 $ 645,470 $ 504,126 $ 626,292 $ 71,850 $ 4,320 $ 6,062,760 Pass/Watch 54,671 18,591 39,045 60,955 30,196 74,762 752 1,319 280,291 Special Mention 56,142 16,770 37,331 29,962 17,649 20,100 — — 177,954 Substandard 36,263 16,118 1,136 11,901 281 29,686 1,065 — 96,450 Doubtful — — — — — — — — — Total commercial real estate $ 2,328,368 $ 1,249,987 $ 908,414 $ 748,288 $ 552,252 $ 750,840 $ 73,667 $ 5,639 $ 6,617,455 Commercial construction, land and land development Pass $ 618,288 $ 262,136 $ 98,007 $ 85,596 $ 13,751 $ 14,939 $ 18,586 $ — $ 1,111,303 Pass/Watch 17,899 10,459 6,869 — — 84 — — 35,311 Special Mention 3,780 — — — 1,909 — — — 5,689 Substandard 11,601 — 387 14,489 28 1,373 — — 27,878 Doubtful — — — — — — — — — Total commercial construction, land and land development $ 651,568 $ 272,595 $ 105,263 $ 100,085 $ 15,688 $ 16,396 $ 18,586 $ — $ 1,180,181 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Residential real estate Pass $ 408,402 $ 267,147 $ 190,890 $ 114,616 $ 88,295 $ 149,871 $ 60,212 $ 2,344 $ 1,281,777 Pass/Watch 1,019 487 1,270 405 2,331 4,179 169 — 9,860 Special Mention 657 — 568 129 250 1,043 126 — 2,773 Substandard 640 369 384 519 774 2,974 52 — 5,712 Doubtful — — — — — — — — — Total residential real estate $ 410,718 $ 268,003 $ 193,112 $ 115,669 $ 91,650 $ 158,067 $ 60,559 $ 2,344 $ 1,300,122 Single-family interim construction Pass $ 305,267 $ 59,584 $ 2,801 $ 312 $ — $ — $ 12,663 $ — $ 380,627 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total single-family interim construction $ 305,267 $ 59,584 $ 2,801 $ 312 $ — $ — $ 12,663 $ — $ 380,627 Agricultural Pass $ 36,442 $ 15,005 $ 4,454 $ 8,033 $ 12,229 $ 4,773 $ 18,993 $ — $ 99,929 Pass/Watch — 526 1,462 52 1,035 — 3,502 — 6,577 Special Mention — — — — — — — — — Substandard — — — — — 6 — — 6 Doubtful — — — — — — — — — Total agricultural $ 36,442 $ 15,531 $ 5,916 $ 8,085 $ 13,264 $ 4,779 $ 22,495 $ — $ 106,512 Consumer Pass $ 10,568 $ 9,496 $ 2,706 $ 710 $ 308 $ 181 $ 57,744 $ 43 $ 81,756 Pass/Watch — — — — 1 — — — 1 Special Mention — — — — — — — — — Substandard 30 2 — — 9 17 — — 58 Doubtful — — — — — — — — — Total consumer $ 10,598 $ 9,498 $ 2,706 $ 710 $ 318 $ 198 $ 57,744 $ 43 $ 81,815 Total loans Pass $ 4,771,917 $ 1,995,309 $ 1,227,819 $ 933,094 $ 700,329 $ 1,051,269 $ 930,290 $ 11,938 $ 11,621,965 Pass/Watch 73,849 33,073 49,665 64,547 45,251 79,090 23,191 4,638 373,304 Special Mention 61,990 16,887 46,416 37,335 20,003 25,714 13,011 — 221,356 Substandard 78,811 17,094 17,948 27,003 3,570 52,387 14,123 1,988 212,924 Doubtful — — — — — — 9,897 — 9,897 Total loans $ 4,986,567 $ 2,062,363 $ 1,341,848 $ 1,061,979 $ 769,153 $ 1,208,460 $ 990,512 $ 18,564 $ 12,439,446

Off-Balance Sheet Arrangement_2

Off-Balance Sheet Arrangements, Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	At June 30, 2022 and December 31, 2021, the approximate amounts of these financial instruments were as follows: June 30, December 31, 2022 2021 Commitments to extend credit $ 3,207,302 $ 2,770,036 Standby letters of credit 29,811 30,007 $ 3,237,113 $ 2,800,043
Commitments Off Balance Sheet Allowance for Credit Losses	The allowance for credit lo sses on off-balance sheet commitments was as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Balance at beginning of period $ 5,479 $ 1,113 $ 4,722 $ — Impact of ASC 326 adoption — — — 1,113 Provision for off-balance sheet credit exposure (748) 620 9 620 Balance at end of period $ 4,731 $ 1,733 $ 4,731 $ 1,733

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax expense for the three and six months ended June 30, 2022 and 2021 was as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Income tax expense for the period $ 13,591 $ 15,467 $ 25,870 $ 31,212 Effective tax rate 20.6 % 21.0 % 20.1 % 20.9 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Assets at Fair Value on Recurring Basis	The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of June 30, 2022 and December 31, 2021 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant June 30, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 244,650 $ — $ 244,650 $ — Government agency securities 416,708 — 416,708 — Obligations of state and municipal subdivisions 265,665 — 265,665 — Corporate bonds 44,211 — 44,211 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 873,948 — 873,948 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 23,885 — 23,885 — Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant Derivative financial instruments: Interest rate lock commitments 622 — 622 — Forward mortgage-backed securities trades 96 — 96 — Loan customer counterparty 81 — 81 — Financial institution counterparty 9,616 — 9,616 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 8,411 — 8,411 — Interest rate lock commitments 10 — 10 — Forward mortgage-backed securities trades 102 — 102 — Loan customer counterparty 9,456 — 9,456 — Financial institution counterparty 95 — 95 — December 31, 2021 Assets: Investment securities available for sale: U.S. treasuries $ 174,996 $ — $ 174,996 $ — Government agency securities 444,675 — 444,675 — Obligations of state and municipal subdivisions 432,760 — 432,760 — Corporate bonds 34,796 — 34,796 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 918,550 — 918,550 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 28,249 — 28,249 — Derivative financial instruments: Interest rate lock commitments 1,029 — 1,029 — Forward mortgage-backed securities trades 27 — 27 — Loan customer counterparty 6,459 — 6,459 — Financial institution counterparty 1,078 — 1,078 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 1,158 — 1,158 — Interest rate lock commitments 4 — 4 — Forward mortgage-backed securities trades 21 — 21 — Loan customer counterparty 1,073 — 1,073 — Financial institution counterparty 6,772 — 6,772 — __________ (1) At June 30, 2022 and December 31, 2021, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $23,250 and $27,176, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at June 30, 2022.
Assets and Liabilities at Fair Value on Nonrecurring Basis	The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at June 30, 2022 and December 31, 2021, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended June 30, 2022 Assets: Individually evaluated loans $ 16,116 $ — $ — $ 16,116 $ (594) Other real estate owned 12,900 — — 12,900 2,361 December 31, 2021 Assets: Individually evaluated loans $ 11,204 $ — $ — $ 11,204 $ 3,526
Carrying Amount and Estimated Fair Value of Financial Instruments	The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at June 30, 2022 and December 31, 2021: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant June 30, 2022 Financial assets: Cash and cash equivalents $ 776,131 $ 776,131 $ 776,131 $ — $ — Certificates of deposit held in other banks 1,265 1,265 — 1,265 — Investment securities held to maturity 207,972 167,479 — 167,479 — Loans held for sale, at cost 2,634 2,680 — 2,680 — Loans, net 13,373,958 13,355,782 — — 13,355,782 FHLB of Dallas stock and other restricted stock 18,495 18,495 — 18,495 — Accrued interest receivable 51,654 51,654 — 51,654 — Financial liabilities: Deposits 15,063,948 15,038,235 — 15,038,235 — Accrued interest payable 5,357 5,357 — 5,357 — FHLB advances 175,000 174,936 — 174,936 — Other borrowings 334,718 333,275 — 333,275 — Junior subordinated debentures 54,320 32,854 — 32,854 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2021 Financial assets: Cash and cash equivalents $ 2,608,444 $ 2,608,444 $ 2,608,444 $ — $ — Certificates of deposit held in other banks 3,245 3,246 — 3,246 — Loans held for sale, at cost 3,875 3,982 — 3,982 — Loans, net 12,290,740 12,415,366 — — 12,415,366 FHLB of Dallas stock and other restricted stock 21,573 21,573 — 21,573 — Accrued interest receivable 49,636 49,636 — 49,636 — Financial liabilities: Deposits 15,553,908 15,553,645 — 15,553,645 — Accrued interest payable 5,301 5,301 — 5,301 — FHLB advances 150,000 128,555 — 128,555 — Other borrowings 283,371 303,250 — 303,250 — Junior subordinated debentures 54,221 45,501 — 45,501 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — —

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Balances and Fair Values of Outstanding Positions	The following table provides the outstanding notional balances and fair values of outstanding derivative positions at June 30, 2022 and December 31, 2021: Outstanding Notional Balance Asset Derivative Liability Derivative June 30, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 8,411 Derivatives not designated as hedging instruments: Interest rate lock commitments 21,951 622 10 Forward mortgage-backed securities trades 24,250 96 102 Commercial loan interest rate swaps: Loan customer counterparty 210,857 81 9,456 Financial institution counterparty 210,857 9,616 95 December 31, 2021 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 1,158 Derivatives not designated as hedging instruments: Interest rate lock commitments 34,064 1,029 4 Forward mortgage-backed securities trades 30,500 27 21 Commercial loan interest rate swaps: Loan customer counterparty 254,935 6,459 1,073 Financial institution counterparty 254,935 1,078 6,772
Schedule of Weighted Average Interest Rate Received and Paid	The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate June 30, 2022 December 31, 2021 Received Paid Received Paid Loan customer counterparty 4.20 % 3.91 % 4.12 % 2.40 %
Income on Derivatives	A summary of derivative activity and the related impact on the consolidated statements of income for the three and six months ended June 30, 2022 and 2021 is as follows: Income Statement Location Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ 36 $ 154 $ 233 $ 154 Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue (32) (40) (413) (1,449) Forward mortgage-backed securities trades Mortgage banking revenue (459) (838) (12) 508

Stock Awards (Tables)

Stock Awards (Tables)	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Summary of nonvested restricted stock awards	The following table summarizes the activity in nonvested restricted stock awards for the six months ended June 30, 2022 and 2021: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 84,284 73.80 Vested during the period (106,199) 59.80 Forfeited during the period (4,546) 53.61 Nonvested shares, June 30, 2022 337,090 $ 56.20 Nonvested shares, December 31, 2020 468,800 $ 49.01 Granted during the period 91,041 64.60 Vested during the period (114,961) 56.65 Forfeited during the period (22,327) 49.06 Nonvested shares, June 30, 2021 422,553 $ 50.23
Schedule of future vesting of restricted stock award	At June 30, 2022, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 149,432 Second year 102,301 Third year 78,219 Fourth year 7,138 Total nonvested shares 337,090
Nonvested performance stock units	The following table summarizes the activity in nonvested performance stock units at target award level for the six months ended June 30, 2022 and 2021: Performance-based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, June 30, 2022 135,240 $ 48.53 Nonvested shares, December 31, 2020 89,300 $ 38.29 Granted during the period 20,198 62.58 Nonvested shares, June 30, 2021 109,498 $ 42.77

Regulatory Matters (Tables)

Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements	The following table presents actual capital amounts and required ratios under Basel III Capital Rules for the Company and Bank as of June 30, 2022 and December 31, 2021. Actual Minimum Capital To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2022 Total capital to risk weighted assets: Consolidated $ 1,879,564 12.24 % $ 1,612,860 10.50 % N/A N/A Bank 2,004,604 13.05 1,612,377 10.50 $ 1,535,597 10.00 % Tier 1 capital to risk weighted assets: Consolidated 1,562,775 10.17 1,305,648 8.50 N/A N/A Bank 1,891,815 12.32 1,305,257 8.50 1,228,478 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,507,175 9.81 1,075,240 7.00 N/A N/A Bank 1,891,815 12.32 1,074,918 7.00 998,138 6.50 Tier 1 capital to average assets: Consolidated 1,562,775 9.28 673,688 4.00 N/A N/A Bank 1,891,815 11.23 673,598 4.00 841,998 5.00 December 31, 2021 Total capital to risk weighted assets: Consolidated $ 1,916,163 13.67 % $ 1,471,510 10.50 % N/A N/A Bank 1,983,530 14.16 1,471,036 10.50 $ 1,400,987 10.00 % Tier 1 capital to risk weighted assets: Consolidated 1,614,372 11.52 1,191,223 8.50 N/A N/A Bank 1,885,739 13.46 1,190,839 8.50 1,120,790 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,772 11.12 981,007 7.00 N/A N/A Bank 1,885,739 13.46 980,691 7.00 910,642 6.50 Tier 1 capital to average assets: Consolidated 1,614,372 8.80 733,954 4.00 N/A N/A Bank 1,885,739 10.28 733,785 4.00 917,231 5.00

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	6 Months Ended
	Jun. 30, 2022 business_trust segment
Accounting Policies [Abstract]
Number of wholly owned statutory business trusts | business_trust	9
Number of reportable segments | segment	1

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic earnings per share:
Net income	$ 52,360	$ 58,243	$ 103,100	$ 118,223
Less: Undistributed earnings allocated to participating securities	297	444	566	931
Less: Dividends paid on participating securities	129	138	256	272
Net income available to common shareholders	$ 51,934	$ 57,661	$ 102,278	$ 117,020
Weighted average basic shares outstanding (shares)	41,397,584	42,756,162	41,913,218	42,743,877
Basic earnings per share (usd per share)	$ 1.25	$ 1.35	$ 2.44	$ 2.74
Diluted earnings per share:
Total weighted average diluted shares outstanding (shares)	41,473,493	42,815,307	41,988,596	42,798,567
Diluted earnings per share (usd per share)	$ 1.25	$ 1.35	$ 2.44	$ 2.73
Anti-dilutive participating securities (shares)	123,849	205,989	135,953	197,851
Performance stock units
Diluted earnings per share:
Add dilutive performance stock (shares)	75,909	59,145	75,378	54,690

Statement of Cash Flows - Other

Statement of Cash Flows - Other Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash transactions:
Interest expense paid	$ 22,358	$ 35,130
Income taxes paid	15,038	28,183
Noncash transactions:
Deferred dividend equivalents	95	117
Transfer of loans to other real estate owned	12,900	0
Transfer of securities available for sale to held to maturity	117,583	0
Right-of-use assets obtained in exchange for lease liabilities	4,012	57
Loans purchased, not yet settled	$ 30,298	$ 38,859

Securities - Amortized Cost of

Securities - Amortized Cost of Securities and Approximate Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	$ 2,048,198	$ 1,999,792
Gross Unrealized Gain, AFS	503	29,004
Gross Unrealized Loss, AFS	(202,569)	(22,069)
Fair Value, AFS	1,846,132	2,006,727
Amortized Cost, HTM	207,972	0
Investment securities held to maturity	167,479
Accrued Interest, AFS	8,000	8,581
Accrued Interest, HTM	2,338
U.S. treasuries
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	260,417	174,950
Gross Unrealized Gain, AFS	0	724
Gross Unrealized Loss, AFS	(15,767)	(678)
Fair Value, AFS	244,650	174,996
Government agency securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	479,869	453,402
Gross Unrealized Gain, AFS	10	1,221
Gross Unrealized Loss, AFS	(63,171)	(9,948)
Fair Value, AFS	416,708	444,675
Obligations of state and municipal subdivisions
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	277,289	418,554
Gross Unrealized Gain, AFS	446	15,440
Gross Unrealized Loss, AFS	(12,070)	(1,234)
Fair Value, AFS	265,665	432,760
Amortized Cost, HTM	207,972
Gross Unrealized Gain, HTM	0
Gross Unrealized Loss, HTM	(40,493)
Investment securities held to maturity	167,479
Corporate bonds
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	46,997	33,994
Gross Unrealized Gain, AFS	9	862
Gross Unrealized Loss, AFS	(2,795)	(60)
Fair Value, AFS	44,211	34,796
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	982,676	917,942
Gross Unrealized Gain, AFS	38	10,757
Gross Unrealized Loss, AFS	(108,766)	(10,149)
Fair Value, AFS	873,948	918,550
Other securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	950	950
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	0	0
Fair Value, AFS	$ 950	$ 950

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities transferred from AFS to HTM		$ 117,583
Transfers unrealized pre-tax gains		$ 26
Securities held to maturity	$ 207,972			$ 207,972		$ 0
Carrying value of securities pledged	995,375			995,375		997,416
Proceeds from sales	0		$ 181	0	$ 181
Allowance for credit loss, AFS securities	0			0
Allowance for credit loss, HTM securities	$ 0			$ 0		$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost, AFS
Due in one year or less	$ 39,472
Due from one year to five years	334,871
Due from five to ten years	452,348
Thereafter	238,831
Total	1,065,522
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	982,676
Amortized Cost, AFS	2,048,198	$ 1,999,792
Fair Value, AFS
Due in one year or less	39,513
Due from one year to five years	321,689
Due from five to ten years	404,933
Thereafter	206,049
Total	972,184
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	873,948
Fair Value	1,846,132	2,006,727
Amortized Cost, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	207,972
Total	207,972
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Amortized Cost, HTM	207,972	$ 0
Fair Value, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	167,479
Total	167,479
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Fair Value	$ 167,479

Securities Available for Sale -

Securities Available for Sale - Proceeds, Gross Gains and Gross Losses from Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 0	$ 181	$ 0	$ 181
Gross gains		0		0
Gross losses		$ 0		$ 0

Securities - Summary of Unreali

Securities - Summary of Unrealized Losses and Fair Value of Securities in Continuous Unrealized Loss Positions (Details) $ in Thousands	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	652	192
Less than 12 months: estimated fair value AFS	$ 1,448,186	$ 1,084,863
Less than 12 months: unrealized losses AFS	$ (146,023)	$ (14,819)
Greater than 12 months: number of securities AFS | security	58	35
Greater than 12 months: estimated fair value AFS	$ 268,623	$ 168,138
Greater than 12 months: unrealized losses AFS	(56,546)	(7,250)
Total: estimated fair value AFS	1,716,809	1,253,001
Total: unrealized losses AFS	$ (202,569)	$ (22,069)
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	36	22
Less than 12 months: estimated fair value AFS	$ 244,650	$ 144,172
Less than 12 months: unrealized losses AFS	$ (15,767)	$ (678)
Greater than 12 months: number of securities AFS | security	0	0
Greater than 12 months: estimated fair value AFS	$ 0	$ 0
Greater than 12 months: unrealized losses AFS	0	0
Total: estimated fair value AFS	244,650	144,172
Total: unrealized losses AFS	$ (15,767)	$ (678)
Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	48	38
Less than 12 months: estimated fair value AFS	$ 268,923	$ 258,334
Less than 12 months: unrealized losses AFS	$ (32,522)	$ (4,622)
Greater than 12 months: number of securities AFS | security	28	22
Greater than 12 months: estimated fair value AFS	$ 139,028	$ 119,963
Greater than 12 months: unrealized losses AFS	(30,649)	(5,326)
Total: estimated fair value AFS	407,951	378,297
Total: unrealized losses AFS	$ (63,171)	$ (9,948)
Obligations of state and municipal subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	235	14
Less than 12 months: estimated fair value AFS	$ 165,919	$ 47,200
Less than 12 months: unrealized losses AFS	$ (12,070)	$ (988)
Greater than 12 months: number of securities AFS | security	0	2
Greater than 12 months: estimated fair value AFS	$ 0	$ 3,555
Greater than 12 months: unrealized losses AFS	0	(246)
Total: estimated fair value AFS	165,919	50,755
Total: unrealized losses AFS	$ (12,070)	$ (1,234)
Less than 12 months: number of securities HTM | security	38
Less than 12 months: estimated fair value HTM	$ 157,120
Less than 12 months: unrealized losses HTM	$ (37,314)
Greater than 12 months: number of securities HTM | security	5
Greater than 12 months: estimated fair value HTM	$ 10,359
Greater than 12 months: unrealized losses HTM	(3,179)
Total: estimated fair value HTM	167,479
Total: unrealized losses HTM	$ (40,493)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	11	3
Less than 12 months: estimated fair value AFS	$ 37,205	$ 13,440
Less than 12 months: unrealized losses AFS	$ (2,795)	$ (60)
Greater than 12 months: number of securities AFS | security	0	0
Greater than 12 months: estimated fair value AFS	$ 0	$ 0
Greater than 12 months: unrealized losses AFS	0	0
Total: estimated fair value AFS	37,205	13,440
Total: unrealized losses AFS	$ (2,795)	$ (60)
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	322	115
Less than 12 months: estimated fair value AFS	$ 731,489	$ 621,717
Less than 12 months: unrealized losses AFS	$ (82,869)	$ (8,471)
Greater than 12 months: number of securities AFS | security	30	11
Greater than 12 months: estimated fair value AFS	$ 129,595	$ 44,620
Greater than 12 months: unrealized losses AFS	(25,897)	(1,678)
Total: estimated fair value AFS	861,084	666,337
Total: unrealized losses AFS	$ (108,766)	$ (10,149)

Loans, Net and Allowance for _3

Loans, Net and Allowance for Credit Losses on Loans - Composition of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 13,518,128		$ 12,439,446
Allowance for credit losses	(144,170)	$ (146,313)	(148,706)	$ (154,791)	$ (165,827)	$ (87,820)
Total loans, net	13,373,958		12,290,740
Deferred loan fees, net	(14,171)		(9,406)
Accrued Interest Receivable	41,312		41,051
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,153,514		1,983,886
Allowance for credit losses	(53,303)	(50,485)	(49,747)	(46,957)	(48,863)	(27,311)
Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	538,190		788,848
Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,405,015		6,617,455
Allowance for credit losses	(53,846)	(59,699)	(65,110)	(67,696)	(69,977)	(36,698)
Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,293,252		1,180,181
Allowance for credit losses	(24,186)	(25,104)	(23,861)	(27,842)	(33,596)	(13,425)
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,470,252		1,300,122
Allowance for credit losses	(3,114)	(2,770)	(2,192)	(3,638)	(4,401)	(6,786)
Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	457,168		380,627
Allowance for credit losses	(9,225)	(7,749)	(7,222)	(8,129)	(8,328)	(2,156)
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	120,126		106,512
Allowance for credit losses	(105)	(132)	(106)	(86)	(108)	(337)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	80,611		81,815
Allowance for credit losses	$ (391)	$ (374)	$ (468)	$ (443)	$ (554)	$ (684)

Loans, Net and Allowance for _4

Loans, Net and Allowance for Credit Losses on Loans - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) modified_loan	Jun. 30, 2021 USD ($) contract modified_loan	Jun. 30, 2022 USD ($) modified_loan	Jun. 30, 2021 USD ($) contract modified_loan	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	$ 6,915,737,000		$ 6,915,737,000		$ 6,769,353,000
Commercial Loans	13,373,958,000		13,373,958,000		12,290,740,000
Troubled debt restructuring modification recorded investment	$ 2,605,000		$ 2,605,000		2,918,000
Number of loans modified under troubled debt restructuring	0	2	0	3
Number of loans modified under troubled debt restructurings that subsequently defaulted | modified_loan	0	0	0	0
Commitments to lend	$ 0	$ 0	$ 0	$ 0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified under troubled debt restructuring | contract		1		2
Commercial | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP interest rate	1%		1%
PPP loans outstanding	$ 26,669,000		$ 26,669,000		112,128,000
PPP deferred loan fees	502,000		$ 502,000		2,552,000
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified under troubled debt restructuring | contract		1		1
Customer Concentration Risk | Consumer | Loans and Leases, Net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio			1%
Geographic Concentration Risk | Loans and Leases, Net | Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio			25%
Minimum | Commercial | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP term			2 years
Maximum | Commercial | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP term			5 years
Energy Related Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	$ 466,951,000		$ 466,951,000		$ 342,776,000
Mortgage warehouse | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Duration of the loans to larger mortgage originators			60 days
Mortgage warehouse | Maximum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Duration of the loans to mortgage bankers			15 days
Owner Occupied | Customer Concentration Risk | Loans and Leases, Net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio			23%
Real Estate Loan | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio (percent)	80%		80%
Loan, amortization period			20 years
Non-Real Estate Loan | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Period of operating lines			1 year

Loans, Net and Allowance for _5

Loans, Net and Allowance for Credit Losses on Loans - Rollforward of Activity in Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 146,313	$ 165,827	$ 148,706	$ 87,820
Provision for credit losses	748	(7,120)	(1,452)	(9,620)
Charge-offs	(2,984)	(3,934)	(3,441)	(4,380)
Recoveries	93	18	357	56
Balance at end of period	144,170	154,791	144,170	154,791
Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				67,880
Initial allowance on loans purchased with credit deterioration				13,035
Commercial
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	50,485	48,863	49,747	27,311
Provision for credit losses	2,737	1,775	3,652	6,276
Charge-offs	(12)	(3,684)	(453)	(3,754)
Recoveries	93	3	357	21
Balance at end of period	53,303	46,957	53,303	46,957
Commercial | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				12,775
Initial allowance on loans purchased with credit deterioration				4,328
Real estate | Commercial Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	59,699	69,977	65,110	36,698
Provision for credit losses	(2,881)	(2,081)	(8,292)	(5,375)
Charge-offs	(2,972)	(200)	(2,972)	(375)
Recoveries	0	0	0	0
Balance at end of period	53,846	67,696	53,846	67,696
Real estate | Commercial Real Estate | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				29,108
Initial allowance on loans purchased with credit deterioration				7,640
Real estate | Commercial Construction, Land and Land Development
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	25,104	33,596	23,861	13,425
Provision for credit losses	(918)	(5,754)	325	(8,392)
Charge-offs	0	0	0	(126)
Recoveries	0	0	0	0
Balance at end of period	24,186	27,842	24,186	27,842
Real estate | Commercial Construction, Land and Land Development | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				22,008
Initial allowance on loans purchased with credit deterioration				927
Real estate | Residential Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	2,770	4,401	2,192	6,786
Provision for credit losses	344	(763)	928	(1,033)
Charge-offs	0	0	(6)	0
Recoveries	0	0	0	0
Balance at end of period	3,114	3,638	3,114	3,638
Real estate | Residential Real Estate | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				(2,255)
Initial allowance on loans purchased with credit deterioration				140
Real estate | Single-family interim construction
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	7,749	8,328	7,222	2,156
Provision for credit losses	1,476	(199)	2,003	(1,206)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	9,225	8,129	9,225	8,129
Real estate | Single-family interim construction | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				7,179
Initial allowance on loans purchased with credit deterioration				0
Agricultural
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	132	108	106	337
Provision for credit losses	(27)	(22)	(1)	(73)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	105	86	105	86
Agricultural | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				(178)
Initial allowance on loans purchased with credit deterioration				0
Consumer
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	374	554	468	684
Provision for credit losses	17	(76)	(67)	183
Charge-offs	0	(50)	(10)	(125)
Recoveries	0	15	0	35
Balance at end of period	391	443	391	443
Consumer | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				(334)
Initial allowance on loans purchased with credit deterioration				0
Unallocated
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	0	0	0	423
Provision for credit losses	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	$ 0	$ 0	$ 0	0
Unallocated | Impact of ASC 326 adoption
Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326				(423)
Initial allowance on loans purchased with credit deterioration				$ 0

Loans, Net and Allowance for _6

Loans, Net and Allowance for Credit Losses on Loans - Individually Evaluated Loans by Loan Class (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	$ 64,464	$ 64,944
Specific allocations of individually evaluated loans	14,257	18,073
Commercial
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	38,903	38,911
Specific allocations of individually evaluated loans	13,721	15,958
Real estate | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	24,249	24,683
Specific allocations of individually evaluated loans	11	1,553
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	1,312	1,350
Specific allocations of individually evaluated loans	525	562
Real estate | Residential Real Estate
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	0	0
Specific allocations of individually evaluated loans	0	0
Real estate | Single-family interim construction
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	0	0
Specific allocations of individually evaluated loans	0	0
Agricultural
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	0	0
Specific allocations of individually evaluated loans	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	0	0
Specific allocations of individually evaluated loans	$ 0	$ 0

Loans, Net and Allowance for _7

Loans, Net and Allowance for Credit Losses on Loans - Summary of Non Performing Loans by Loan Class (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	$ 2,605,000		$ 2,605,000		$ 2,918,000
Nonaccrual, No Allowance	1,076,000		1,076,000		18,000
Financing Receivable, Nonaccrual, Interest Income	0	$ 0	0	$ 0
Nonperforming Financial Instruments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	67,786,000		67,786,000		53,673,000
Loans past due 90 days and still accruing	501,000		501,000		1,790,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	1,604,000		1,604,000		1,875,000
Total nonperforming loans	69,891,000		69,891,000		57,338,000
Nonperforming Financial Instruments | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	40,873,000		40,873,000		36,802,000
Loans past due 90 days and still accruing	2,000		2,000		187,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0		0		0
Total nonperforming loans	40,875,000		40,875,000		36,989,000
Nonperforming Financial Instruments | Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	25,504,000		25,504,000		15,218,000
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	1,448,000		1,448,000		1,714,000
Total nonperforming loans	26,952,000		26,952,000		16,932,000
Nonperforming Financial Instruments | Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	19,000		19,000		23,000
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0		0		0
Total nonperforming loans	19,000		19,000		23,000
Nonperforming Financial Instruments | Real estate | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,379,000		1,379,000		1,592,000
Loans past due 90 days and still accruing	499,000		499,000		1,603,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	156,000		156,000		161,000
Total nonperforming loans	2,034,000		2,034,000		3,356,000
Nonperforming Financial Instruments | Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0		0		0
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0		0		0
Total nonperforming loans	0		0		0
Nonperforming Financial Instruments | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0		0		0
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0		0		0
Total nonperforming loans	0		0		0
Nonperforming Financial Instruments | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	11,000		11,000		38,000
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0		0		0
Total nonperforming loans	$ 11,000		$ 11,000		$ 38,000

Loans, Net and Allowance for _8

Loans, Net and Allowance for Credit Losses on Loans - Summary of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 modified_loan	Jun. 30, 2021 USD ($) contract	Jun. 30, 2022 modified_loan	Jun. 30, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring	0	2	0	3
Pre-restructuring outstanding recorded investment		$ 1,746		$ 1,795
Post-restructuring outstanding recorded investment		$ 532		$ 576
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		1		2
Pre-restructuring outstanding recorded investment		$ 1,740		$ 1,789
Post-restructuring outstanding recorded investment		$ 526		$ 570
Real estate | Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Pre-restructuring outstanding recorded investment		$ 0		$ 0
Post-restructuring outstanding recorded investment		$ 0		$ 0
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Pre-restructuring outstanding recorded investment		$ 0		$ 0
Post-restructuring outstanding recorded investment		$ 0		$ 0
Real estate | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Pre-restructuring outstanding recorded investment		$ 0		$ 0
Post-restructuring outstanding recorded investment		$ 0		$ 0
Real estate | Single-family interim construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Pre-restructuring outstanding recorded investment		$ 0		$ 0
Post-restructuring outstanding recorded investment		$ 0		$ 0
Agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		0		0
Pre-restructuring outstanding recorded investment		$ 0		$ 0
Post-restructuring outstanding recorded investment		$ 0		$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified under troubled debt restructuring | contract		1		1
Pre-restructuring outstanding recorded investment		$ 6		$ 6
Post-restructuring outstanding recorded investment		$ 6		$ 6

Loans, Net and Allowance for _9

Loans, Net and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Loan Class (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 13,518,128	$ 12,439,446
Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,153,514	1,983,886
Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans	538,190	788,848
Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	7,405,015	6,617,455
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,293,252	1,180,181
Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,470,252	1,300,122
Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	457,168	380,627
Agricultural
Financing Receivable, Past Due [Line Items]
Loans	120,126	106,512
Consumer
Financing Receivable, Past Due [Line Items]
Loans	80,611	81,815
Loans 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	13,245	9,262
Loans 30-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,486	1,041
Loans 30-89 Days Past Due | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 30-89 Days Past Due | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	6,031	2,861
Loans 30-89 Days Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	443	0
Loans 30-89 Days Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,972	3,838
Loans 30-89 Days Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	2,204	1,290
Loans 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	16
Loans 30-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	109	216
Loans 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	26,604	24,762
Loans 90 Days or More Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	13,545	11,056
Loans 90 Days or More Past Due | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	12,053	11,784
Loans 90 Days or More Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	995	1,913
Loans 90 Days or More Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	11	9
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Loans	39,849	34,024
Total Past Due Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	16,031	12,097
Total Past Due Loans | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans	0	0
Total Past Due Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	18,084	14,645
Total Past Due Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	443	0
Total Past Due Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	2,967	5,751
Total Past Due Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	2,204	1,290
Total Past Due Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	16
Total Past Due Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	120	225
Current Loans
Financing Receivable, Past Due [Line Items]
Loans	13,478,279	12,405,422
Current Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,137,483	1,971,789
Current Loans | Mortgage warehouse
Financing Receivable, Past Due [Line Items]
Loans	538,190	788,848
Current Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	7,386,931	6,602,810
Current Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,292,809	1,180,181
Current Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,467,285	1,294,371
Current Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	454,964	379,337
Current Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	120,126	106,496
Current Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 80,491	$ 81,590

Loans, Net and Allowance for_10

Loans, Net and Allowance for Credit Losses on Loans - Loans held for investment by year of origination and internally assigned credit grade (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	$ 3,538,047	$ 4,986,567
Term Loans by Year of Origination, Year 2	3,799,656	2,062,363
Term Loans by Year of Origination, Year 3	1,748,862	1,341,848
Term Loans by Year of Origination, Year 4	1,109,374	1,061,979
Term Loans by Year of Origination, Year 5	816,027	769,153
Term Loans by Year of Origination, Prior	1,324,833	1,208,460
Revolving Loans	1,170,626	990,512
Revolving Loans Converted to Term Loans	10,703	18,564
Total Loans	13,518,128	12,439,446
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	3,455,292	4,771,917
Term Loans by Year of Origination, Year 2	3,629,688	1,995,309
Term Loans by Year of Origination, Year 3	1,704,486	1,227,819
Term Loans by Year of Origination, Year 4	1,066,620	933,094
Term Loans by Year of Origination, Year 5	734,618	700,329
Term Loans by Year of Origination, Prior	1,206,038	1,051,269
Revolving Loans	1,121,910	930,290
Revolving Loans Converted to Term Loans	10,666	11,938
Total Loans	12,929,318	11,621,965
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	51,259	73,849
Term Loans by Year of Origination, Year 2	54,130	33,073
Term Loans by Year of Origination, Year 3	34,643	49,665
Term Loans by Year of Origination, Year 4	19,627	64,547
Term Loans by Year of Origination, Year 5	61,925	45,251
Term Loans by Year of Origination, Prior	72,057	79,090
Revolving Loans	21,070	23,191
Revolving Loans Converted to Term Loans	7	4,638
Total Loans	314,718	373,304
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	15,153	61,990
Term Loans by Year of Origination, Year 2	42,037	16,887
Term Loans by Year of Origination, Year 3	8,458	46,416
Term Loans by Year of Origination, Year 4	10,861	37,335
Term Loans by Year of Origination, Year 5	7,652	20,003
Term Loans by Year of Origination, Prior	30,003	25,714
Revolving Loans	1,500	13,011
Revolving Loans Converted to Term Loans	30	0
Total Loans	115,694	221,356
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	16,343	78,811
Term Loans by Year of Origination, Year 2	73,801	17,094
Term Loans by Year of Origination, Year 3	1,275	17,948
Term Loans by Year of Origination, Year 4	12,266	27,003
Term Loans by Year of Origination, Year 5	11,832	3,570
Term Loans by Year of Origination, Prior	16,735	52,387
Revolving Loans	16,882	14,123
Revolving Loans Converted to Term Loans	0	1,988
Total Loans	149,134	212,924
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	9,264	9,897
Revolving Loans Converted to Term Loans	0	0
Total Loans	9,264	9,897
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	232,268	454,758
Term Loans by Year of Origination, Year 2	401,885	187,165
Term Loans by Year of Origination, Year 3	162,139	123,636
Term Loans by Year of Origination, Year 4	162,067	88,830
Term Loans by Year of Origination, Year 5	64,282	95,981
Term Loans by Year of Origination, Prior	187,587	278,180
Revolving Loans	941,777	744,798
Revolving Loans Converted to Term Loans	1,509	10,538
Total Loans	2,153,514	1,983,886
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	230,425	422,810
Term Loans by Year of Origination, Year 2	368,056	183,433
Term Loans by Year of Origination, Year 3	160,681	98,059
Term Loans by Year of Origination, Year 4	150,671	78,357
Term Loans by Year of Origination, Year 5	62,296	81,620
Term Loans by Year of Origination, Prior	170,806	255,213
Revolving Loans	895,221	690,242
Revolving Loans Converted to Term Loans	1,502	5,231
Total Loans	2,039,658	1,814,965
Commercial | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	260
Term Loans by Year of Origination, Year 2	8,947	3,010
Term Loans by Year of Origination, Year 3	840	1,019
Term Loans by Year of Origination, Year 4	370	3,135
Term Loans by Year of Origination, Year 5	1,928	11,688
Term Loans by Year of Origination, Prior	2,225	65
Revolving Loans	19,142	18,768
Revolving Loans Converted to Term Loans	7	3,319
Total Loans	33,459	41,264
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	1,411
Term Loans by Year of Origination, Year 2	280	117
Term Loans by Year of Origination, Year 3	109	8,517
Term Loans by Year of Origination, Year 4	64	7,244
Term Loans by Year of Origination, Year 5	0	195
Term Loans by Year of Origination, Prior	4,608	4,571
Revolving Loans	1,375	12,885
Revolving Loans Converted to Term Loans	0	0
Total Loans	6,436	34,940
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	1,843	30,277
Term Loans by Year of Origination, Year 2	24,602	605
Term Loans by Year of Origination, Year 3	509	16,041
Term Loans by Year of Origination, Year 4	10,962	94
Term Loans by Year of Origination, Year 5	58	2,478
Term Loans by Year of Origination, Prior	9,948	18,331
Revolving Loans	16,775	13,006
Revolving Loans Converted to Term Loans	0	1,988
Total Loans	64,697	82,820
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	9,264	9,897
Revolving Loans Converted to Term Loans	0	0
Total Loans	9,264	9,897
Commercial | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Mortgage warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	538,190	788,848
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	538,190	788,848
Mortgage warehouse | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	538,190	788,848
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	538,190	788,848
Mortgage warehouse | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	1,851,730	2,328,368
Term Loans by Year of Origination, Year 2	2,156,965	1,249,987
Term Loans by Year of Origination, Year 3	1,081,118	908,414
Term Loans by Year of Origination, Year 4	710,442	748,288
Term Loans by Year of Origination, Year 5	614,154	552,252
Term Loans by Year of Origination, Prior	914,241	750,840
Revolving Loans	67,706	73,667
Revolving Loans Converted to Term Loans	8,659	5,639
Total Loans	7,405,015	6,617,455
Real estate | Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	1,807,180	2,181,292
Term Loans by Year of Origination, Year 2	2,037,554	1,198,508
Term Loans by Year of Origination, Year 3	1,049,647	830,902
Term Loans by Year of Origination, Year 4	683,214	645,470
Term Loans by Year of Origination, Year 5	535,087	504,126
Term Loans by Year of Origination, Prior	820,778	626,292
Revolving Loans	67,706	71,850
Revolving Loans Converted to Term Loans	8,629	4,320
Total Loans	7,009,795	6,062,760
Real estate | Commercial Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	31,063	54,671
Term Loans by Year of Origination, Year 2	44,166	18,591
Term Loans by Year of Origination, Year 3	22,710	39,045
Term Loans by Year of Origination, Year 4	16,498	60,955
Term Loans by Year of Origination, Year 5	59,934	30,196
Term Loans by Year of Origination, Prior	67,137	74,762
Revolving Loans	0	752
Revolving Loans Converted to Term Loans	0	1,319
Total Loans	241,508	280,291
Real estate | Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	10,656	56,142
Term Loans by Year of Origination, Year 2	41,757	16,770
Term Loans by Year of Origination, Year 3	8,349	37,331
Term Loans by Year of Origination, Year 4	10,093	29,962
Term Loans by Year of Origination, Year 5	7,412	17,649
Term Loans by Year of Origination, Prior	24,253	20,100
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	30	0
Total Loans	102,550	177,954
Real estate | Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	2,831	36,263
Term Loans by Year of Origination, Year 2	33,488	16,118
Term Loans by Year of Origination, Year 3	412	1,136
Term Loans by Year of Origination, Year 4	637	11,901
Term Loans by Year of Origination, Year 5	11,721	281
Term Loans by Year of Origination, Prior	2,073	29,686
Revolving Loans	0	1,065
Revolving Loans Converted to Term Loans	0	0
Total Loans	51,162	96,450
Real estate | Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Commercial Real Estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	341,545	651,568
Term Loans by Year of Origination, Year 2	603,185	272,595
Term Loans by Year of Origination, Year 3	209,313	105,263
Term Loans by Year of Origination, Year 4	60,568	100,085
Term Loans by Year of Origination, Year 5	43,431	15,688
Term Loans by Year of Origination, Prior	18,779	16,396
Revolving Loans	16,145	18,586
Revolving Loans Converted to Term Loans	286	0
Total Loans	1,293,252	1,180,181
Real estate | Commercial Construction, Land and Land Development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	307,601	618,288
Term Loans by Year of Origination, Year 2	588,346	262,136
Term Loans by Year of Origination, Year 3	199,405	98,007
Term Loans by Year of Origination, Year 4	60,334	85,596
Term Loans by Year of Origination, Year 5	43,431	13,751
Term Loans by Year of Origination, Prior	17,371	14,939
Revolving Loans	16,145	18,586
Revolving Loans Converted to Term Loans	286	0
Total Loans	1,232,919	1,111,303
Real estate | Commercial Construction, Land and Land Development | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	17,896	17,899
Term Loans by Year of Origination, Year 2	49	10,459
Term Loans by Year of Origination, Year 3	9,908	6,869
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	78	84
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	27,931	35,311
Real estate | Commercial Construction, Land and Land Development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	4,497	3,780
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	1,909
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	4,497	5,689
Real estate | Commercial Construction, Land and Land Development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	11,551	11,601
Term Loans by Year of Origination, Year 2	14,790	0
Term Loans by Year of Origination, Year 3	0	387
Term Loans by Year of Origination, Year 4	234	14,489
Term Loans by Year of Origination, Year 5	0	28
Term Loans by Year of Origination, Prior	1,330	1,373
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	27,905	27,878
Real estate | Commercial Construction, Land and Land Development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Commercial Construction, Land and Land Development | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	346,000	410,718
Term Loans by Year of Origination, Year 2	377,282	268,003
Term Loans by Year of Origination, Year 3	240,778	193,112
Term Loans by Year of Origination, Year 4	168,806	115,669
Term Loans by Year of Origination, Year 5	86,855	91,650
Term Loans by Year of Origination, Prior	194,587	158,067
Revolving Loans	55,695	60,559
Revolving Loans Converted to Term Loans	249	2,344
Total Loans	1,470,252	1,300,122
Real estate | Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	343,582	408,402
Term Loans by Year of Origination, Year 2	375,398	267,147
Term Loans by Year of Origination, Year 3	239,765	190,890
Term Loans by Year of Origination, Year 4	166,209	114,616
Term Loans by Year of Origination, Year 5	86,525	88,295
Term Loans by Year of Origination, Prior	187,483	149,871
Revolving Loans	54,992	60,212
Revolving Loans Converted to Term Loans	249	2,344
Total Loans	1,454,203	1,281,777
Real estate | Residential Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	2,300	1,019
Term Loans by Year of Origination, Year 2	968	487
Term Loans by Year of Origination, Year 3	659	1,270
Term Loans by Year of Origination, Year 4	1,460	405
Term Loans by Year of Origination, Year 5	37	2,331
Term Loans by Year of Origination, Prior	2,617	4,179
Revolving Loans	471	169
Revolving Loans Converted to Term Loans	0	0
Total Loans	8,512	9,860
Real estate | Residential Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	657
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	568
Term Loans by Year of Origination, Year 4	704	129
Term Loans by Year of Origination, Year 5	240	250
Term Loans by Year of Origination, Prior	1,142	1,043
Revolving Loans	125	126
Revolving Loans Converted to Term Loans	0	0
Total Loans	2,211	2,773
Real estate | Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	118	640
Term Loans by Year of Origination, Year 2	916	369
Term Loans by Year of Origination, Year 3	354	384
Term Loans by Year of Origination, Year 4	433	519
Term Loans by Year of Origination, Year 5	53	774
Term Loans by Year of Origination, Prior	3,345	2,974
Revolving Loans	107	52
Revolving Loans Converted to Term Loans	0	0
Total Loans	5,326	5,712
Real estate | Residential Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Residential Real Estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Single-family interim construction
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	179,685	305,267
Term Loans by Year of Origination, Year 2	225,505	59,584
Term Loans by Year of Origination, Year 3	31,165	2,801
Term Loans by Year of Origination, Year 4	0	312
Term Loans by Year of Origination, Year 5	277	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	20,536	12,663
Revolving Loans Converted to Term Loans	0	0
Total Loans	457,168	380,627
Real estate | Single-family interim construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	179,685	305,267
Term Loans by Year of Origination, Year 2	225,505	59,584
Term Loans by Year of Origination, Year 3	31,165	2,801
Term Loans by Year of Origination, Year 4	0	312
Term Loans by Year of Origination, Year 5	277	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	20,536	12,663
Revolving Loans Converted to Term Loans	0	0
Total Loans	457,168	380,627
Real estate | Single-family interim construction | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	44,335	36,442
Term Loans by Year of Origination, Year 2	26,854	15,531
Term Loans by Year of Origination, Year 3	15,191	5,916
Term Loans by Year of Origination, Year 4	5,137	8,085
Term Loans by Year of Origination, Year 5	6,631	13,264
Term Loans by Year of Origination, Prior	9,461	4,779
Revolving Loans	12,517	22,495
Revolving Loans Converted to Term Loans	0	0
Total Loans	120,126	106,512
Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	44,335	36,442
Term Loans by Year of Origination, Year 2	26,854	15,005
Term Loans by Year of Origination, Year 3	14,665	4,454
Term Loans by Year of Origination, Year 4	3,838	8,033
Term Loans by Year of Origination, Year 5	6,605	12,229
Term Loans by Year of Origination, Prior	9,440	4,773
Revolving Loans	11,060	18,993
Revolving Loans Converted to Term Loans	0	0
Total Loans	116,797	99,929
Agricultural | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	526
Term Loans by Year of Origination, Year 3	526	1,462
Term Loans by Year of Origination, Year 4	1,299	52
Term Loans by Year of Origination, Year 5	26	1,035
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	1,457	3,502
Revolving Loans Converted to Term Loans	0	0
Total Loans	3,308	6,577
Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	21	6
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	21	6
Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Agricultural | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	4,294	10,598
Term Loans by Year of Origination, Year 2	7,980	9,498
Term Loans by Year of Origination, Year 3	9,158	2,706
Term Loans by Year of Origination, Year 4	2,354	710
Term Loans by Year of Origination, Year 5	397	318
Term Loans by Year of Origination, Prior	178	198
Revolving Loans	56,250	57,744
Revolving Loans Converted to Term Loans	0	43
Total Loans	80,611	81,815
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	4,294	10,568
Term Loans by Year of Origination, Year 2	7,975	9,496
Term Loans by Year of Origination, Year 3	9,158	2,706
Term Loans by Year of Origination, Year 4	2,354	710
Term Loans by Year of Origination, Year 5	397	308
Term Loans by Year of Origination, Prior	160	181
Revolving Loans	56,250	57,744
Revolving Loans Converted to Term Loans	0	43
Total Loans	80,588	81,756
Consumer | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	1
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	1
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	30
Term Loans by Year of Origination, Year 2	5	2
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	9
Term Loans by Year of Origination, Prior	18	17
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	23	58
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0	0
Term Loans by Year of Origination, Year 2	0	0
Term Loans by Year of Origination, Year 3	0	0
Term Loans by Year of Origination, Year 4	0	0
Term Loans by Year of Origination, Year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	$ 0
Consumer | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0
Term Loans by Year of Origination, Year 2	0
Term Loans by Year of Origination, Year 3	0
Term Loans by Year of Origination, Year 4	0
Term Loans by Year of Origination, Year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	$ 0

Off-Balance Sheet Arrangement_3

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 3,237,113	$ 2,800,043
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	3,207,302	2,770,036
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 29,811	$ 30,007

Off-Balance Sheet Arrangement_4

Off-Balance Sheet Arrangements, Commitments and Contingencies - Allowance for Off-Balance Sheet Credit Exposure (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 5,479	$ 1,113	$ 4,722	$ 0
Provision for off-balance sheet credit exposure	(748)	620	9	620
Balance at end of period	$ 4,731	$ 1,733	$ 4,731	1,733
Impact of ASC 326 adoption
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period				$ 1,113

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income tax expense for the period	$ 13,591	$ 15,467	$ 25,870	$ 31,212
Effective tax rate (percent)	20.60%	21%	20.10%	20.90%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 1,846,132,000	$ 2,006,727,000
Loans held for sale, fair value option	23,885,000	28,249,000
Aggregate principal balance of loans held for sale	23,250,000	27,176,000
Loans held for sale, 90 days or greater past due	0
Loans held for sale, non-accrual	0
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	8,411,000	1,158,000
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	8,411,000	1,158,000
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	0	0
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	8,411,000	1,158,000
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	23,885,000	28,249,000
Not designated as hedging | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	0	0
Not designated as hedging | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	23,885,000	28,249,000
Not designated as hedging | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	0	0
Not designated as hedging | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	622,000	1,029,000
Derivative financial instruments - Liabilities	10,000	4,000
Not designated as hedging | Interest rate lock commitments | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	622,000	1,029,000
Derivative financial instruments - Liabilities	10,000	4,000
Not designated as hedging | Interest rate lock commitments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest rate lock commitments | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	622,000	1,029,000
Derivative financial instruments - Liabilities	10,000	4,000
Not designated as hedging | Interest rate lock commitments | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Forward mortgage-backed securities trades
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	96,000	27,000
Derivative financial instruments - Liabilities	102,000	21,000
Not designated as hedging | Forward mortgage-backed securities trades | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	96,000	27,000
Derivative financial instruments - Liabilities	102,000	21,000
Not designated as hedging | Forward mortgage-backed securities trades | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Forward mortgage-backed securities trades | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	96,000	27,000
Derivative financial instruments - Liabilities	102,000	21,000
Not designated as hedging | Forward mortgage-backed securities trades | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest rate swaps - cash flow hedges | Loan customer counterparty | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	81,000	6,459,000
Derivative financial instruments - Liabilities	9,456,000	1,073,000
Not designated as hedging | Interest rate swaps - cash flow hedges | Loan customer counterparty | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest rate swaps - cash flow hedges | Loan customer counterparty | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	81,000	6,459,000
Derivative financial instruments - Liabilities	9,456,000	1,073,000
Not designated as hedging | Interest rate swaps - cash flow hedges | Loan customer counterparty | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest rate swaps - cash flow hedges | Financial institution counterparty | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	9,616,000	1,078,000
Derivative financial instruments - Liabilities	95,000	6,772,000
Not designated as hedging | Interest rate swaps - cash flow hedges | Financial institution counterparty | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest rate swaps - cash flow hedges | Financial institution counterparty | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	9,616,000	1,078,000
Derivative financial instruments - Liabilities	95,000	6,772,000
Not designated as hedging | Interest rate swaps - cash flow hedges | Financial institution counterparty | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	244,650,000	174,996,000
U.S. treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	244,650,000	174,996,000
U.S. treasuries | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
U.S. treasuries | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	244,650,000	174,996,000
U.S. treasuries | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Government agency securities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	416,708,000	444,675,000
Government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	416,708,000	444,675,000
Government agency securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Government agency securities | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	416,708,000	444,675,000
Government agency securities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Obligations of state and municipal subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	265,665,000	432,760,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	265,665,000	432,760,000
Obligations of state and municipal subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Obligations of state and municipal subdivisions | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	265,665,000	432,760,000
Obligations of state and municipal subdivisions | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	44,211,000	34,796,000
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	44,211,000	34,796,000
Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Corporate bonds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	44,211,000	34,796,000
Corporate bonds | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	873,948,000	918,550,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	873,948,000	918,550,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	873,948,000	918,550,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Other securities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	950,000	950,000
Other securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	950,000	950,000
Other securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Other securities | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	950,000	950,000
Other securities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 0	$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and Liabilities at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 64,464	$ 64,944
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	16,116	11,204
Other real estate owned	12,900	0
Fair Value, Measurements, Nonrecurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	(594)	3,526
Fair Value, Measurements, Nonrecurring | Other real estate owned
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	2,361
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	16,116	$ 11,204
Other real estate owned	$ 12,900

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financial assets:
Investment securities held to maturity	$ 167,479
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,237,113	$ 2,800,043
Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,207,302	2,770,036
Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	29,811	30,007
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	776,131	2,608,444
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0
Loans held for sale, at cost	0	0
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	1,265	3,246
Investment securities held to maturity	167,479
Loans held for sale, at cost	2,680	3,982
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	18,495	21,573
Accrued interest receivable	51,654	49,636
Financial liabilities:
Deposits	15,038,235	15,553,645
Accrued interest payable	5,357	5,301
FHLB advances	174,936	128,555
Other borrowings	333,275	303,250
Junior subordinated debentures	32,854	45,501
Significant Other Observable Inputs (Level 2) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0
Loans held for sale, at cost	0	0
Loans, net	13,355,782	12,415,366
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Significant Unobservable Inputs (Level 3) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount
Financial assets:
Cash and cash equivalents	776,131	2,608,444
Certificates of deposit held in other banks	1,265	3,245
Investment securities held to maturity	207,972
Loans held for sale, at cost	2,634	3,875
Loans, net	13,373,958	12,290,740
FHLB of Dallas stock and other restricted stock	18,495	21,573
Accrued interest receivable	51,654	49,636
Financial liabilities:
Deposits	15,063,948	15,553,908
Accrued interest payable	5,357	5,301
FHLB advances	175,000	150,000
Other borrowings	334,718	283,371
Junior subordinated debentures	54,320	54,221
Carrying Amount | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value
Financial assets:
Cash and cash equivalents	776,131	2,608,444
Certificates of deposit held in other banks	1,265	3,246
Investment securities held to maturity	167,479
Loans held for sale, at cost	2,680	3,982
Loans, net	13,355,782	12,415,366
FHLB of Dallas stock and other restricted stock	18,495	21,573
Accrued interest receivable	51,654	49,636
Financial liabilities:
Deposits	15,038,235	15,553,645
Accrued interest payable	5,357	5,301
FHLB advances	174,936	128,555
Other borrowings	333,275	303,250
Junior subordinated debentures	32,854	45,501
Estimated Fair Value | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($) derivative	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($) derivative	Dec. 31, 2021 USD ($)
Derivative [Line Items]
Number of interest rate derivatives instruments entered into | derivative		2		2
Unrealized (losses) gains arising during the period, net of tax	$ (1,623,000)	$ 431,000	$ (5,546,000)	$ 431,000
Reclassification of amount of gains recognized into income, net of tax	(32,000)	(124,000)	(192,000)	(124,000)
Cash collateral pledged for derivatives	20,266,000		20,266,000		$ 20,491,000
Securities collateral pledged for derivatives	2,958,000		2,958,000		3,168,000
Interest rate swaps - cash flow hedges | Loan customer counterparty
Derivative [Line Items]
Credit exposure limited to the net favorable value of all swaps	$ 9,697,000		$ 9,697,000		7,537,000
Risk Participation Agreements Participant Bank
Derivative [Line Items]
Number of risk participation agreements	0		0
Risk Participation Agreements Lead Bank
Derivative [Line Items]
Number of risk participation agreements	1		1
Credit risk participation	$ 9,217,000		$ 9,217,000
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges
Derivative [Line Items]
Derivative notional amount	100,000,000	$ 100,000,000	100,000,000	$ 100,000,000	$ 100,000,000
Cash flow hedge gain (loss), net to be reclassified during next 12 months	$ 2,123,000		$ 2,123,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Balances and Fair Values of Outstanding Positions (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Designated as Hedging Instrument | Interest rate swaps - cash flow hedges
Derivative [Line Items]
Outstanding Notional Balance	$ 100,000	$ 100,000	$ 100,000
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	8,411	1,158
Not designated as hedging | Interest rate swaps - cash flow hedges | Commercial Loan | Loan customer counterparty
Derivative [Line Items]
Outstanding Notional Balance	210,857	254,935
Asset Derivative Fair Value	81	6,459
Liability Derivative Fair Value	9,456	1,073
Not designated as hedging | Interest rate swaps - cash flow hedges | Commercial Loan | Financial institution counterparty
Derivative [Line Items]
Outstanding Notional Balance	210,857	254,935
Asset Derivative Fair Value	9,616	1,078
Liability Derivative Fair Value	95	6,772
Not designated as hedging | Interest rate lock commitments
Derivative [Line Items]
Outstanding Notional Balance	21,951	34,064
Asset Derivative Fair Value	622	1,029
Liability Derivative Fair Value	10	4
Not designated as hedging | Forward mortgage-backed securities trades
Derivative [Line Items]
Outstanding Notional Balance	24,250	30,500
Asset Derivative Fair Value	96	27
Liability Derivative Fair Value	$ 102	$ 21

Derivative Financial Instrume_5

Derivative Financial Instruments - Schedule of Weighted Average Interest Rates (Details) - Commercial Loan - Not designated as hedging - Loan customer counterparty - Interest rate swaps - cash flow hedges	Jun. 30, 2022	Dec. 31, 2021
Interest Rate Received
Derivative [Line Items]
Weighted Average Interest Rate received	4.20%	4.12%
Interest Rate Paid
Derivative [Line Items]
Weighted Average Interest Rate Paid	3.91%	2.40%

Derivative Financial Instrume_6

Derivative Financial Instruments - Income (Loss) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest rate swaps - cash flow hedges | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ 36	$ 154	$ 233	$ 154
Interest rate lock commitments | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	(32)	(40)	(413)	(1,449)
Forward mortgage-backed securities trades | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ (459)	$ (838)	$ (12)	$ 508

Stock Awards - Additional Infor

Stock Awards - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 2,542	$ 2,030	$ 4,568	$ 4,526
Estimated future compensation expense		14,108		$ 14,108
Period for recognition				2 years 2 months 12 days
Fair value of common stock awards vested				$ 7,985	7,538
Stock based compensation expense				$ 5,821	$ 5,554
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)				84,284	91,041
Excess tax expense (benefits) on vested restricted stock		2	(32)	$ (352)	$ (226)
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)				20,742	20,198
Period for recognition				2 years 2 months 23 days
Stock based compensation expense		867	$ 318	$ 1,253	$ 1,028
Unrecognized compensation expense		3,771		3,771
Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 7,137		$ 7,137
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)	0
Shares reserved for future issuance (shares)						1,500,000
Remaining available for grant for future awards (shares)		1,493,000		1,493,000
2013 Equity Incentive Plan | Minimum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				1 year
2013 Equity Incentive Plan | Minimum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				3 years
Stock based compensation, award vesting percentage				0%
2013 Equity Incentive Plan | Maximum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				5 years
2013 Equity Incentive Plan | Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				4 years
Stock based compensation, award vesting percentage				150%

Stock Awards - Nonvested Restri

Stock Awards - Nonvested Restricted Stock Awards Activity (Details) - Restricted Stock - $ / shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Number of Shares
Nonvested shares, beginning balance (shares)	363,551	468,800
Granted during the period (shares)	84,284	91,041
Vested during the period (shares)	(106,199)	(114,961)
Forfeited during the period (shares)	(4,546)	(22,327)
Nonvested shares, ending balance (shares)	337,090	422,553
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 53.14	$ 49.01
Granted during the period (usd per share)	73.80	64.60
Vested during the period (usd per share)	59.80	56.65
Forfeited during the period (usd per share)	53.61	49.06
Nonvested shares, ending balance (usd per share)	$ 56.20	$ 50.23

Stock Awards - Future Vesting S

Stock Awards - Future Vesting Schedule of Nonvested Shares (Details)	Jun. 30, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	337,090
First year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	149,432
Second year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	102,301
Third year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	78,219
Fourth year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	7,138

Stock Awards - Schedule of Nonv

Stock Awards - Schedule of Nonvested Restricted Stock Awards (Details) - Performance stock units - $ / shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Number of Shares
Nonvested shares, beginning balance (shares)	114,498	89,300
Granted during the period (shares)	20,742	20,198
Nonvested shares, ending balance (shares)	135,240	109,498
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 43.93	$ 38.29
Granted during the period (usd per share)	73.94	62.58
Nonvested shares, ending balance (usd per share)	$ 48.53	$ 42.77

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Consolidated
Total capital to risk weighted assets:
Actual Amount	$ 1,879,564	$ 1,916,163
Actual Ratio (percent)	0.1224	0.1367
Minimum for Capital Required - Basel III Amount	$ 1,612,860	$ 1,471,510
Minimum for Capital Required - Basel III Ratio (percent)	0.1050	0.1050
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,562,775	$ 1,614,372
Actual Ratio (percent)	0.1017	0.1152
Minimum for Capital Required - Basel III Amount	$ 1,305,648	$ 1,191,223
Minimum for Capital Required - Basel III (percent)	0.0850	0.0850
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,507,175	$ 1,558,772
Actual ratio (percent)	0.0981	0.1112
Minimum for Capital Required - Basel III Amount	$ 1,075,240	$ 981,007
Minimum for Capital Required - Basel III (percent)	0.0700	0.0700
Tier 1 capital to average assets:
Actual Amount	$ 1,562,775	$ 1,614,372
Actual Ratio (percent)	0.0928	0.0880
Minimum for Capital Required - Basel III Amount	$ 673,688	$ 733,954
Minimum for Capital Required - Basel III Ratio (percent)	0.0400	0.0400
Bank
Total capital to risk weighted assets:
Actual Amount	$ 2,004,604	$ 1,983,530
Actual Ratio (percent)	0.1305	0.1416
Minimum for Capital Required - Basel III Amount	$ 1,612,377	$ 1,471,036
Minimum for Capital Required - Basel III Ratio (percent)	0.1050	0.1050
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 1,535,597	$ 1,400,987
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,891,815	$ 1,885,739
Actual Ratio (percent)	0.1232	0.1346
Minimum for Capital Required - Basel III Amount	$ 1,305,257	$ 1,190,839
Minimum for Capital Required - Basel III (percent)	0.0850	0.0850
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 1,228,478	$ 1,120,790
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (percent)	0.0800	0.0800
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,891,815	$ 1,885,739
Actual ratio (percent)	0.1232	0.1346
Minimum for Capital Required - Basel III Amount	$ 1,074,918	$ 980,691
Minimum for Capital Required - Basel III (percent)	0.0700	0.0700
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 998,138	$ 910,642
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (percent)	0.0650	0.0650
Tier 1 capital to average assets:
Actual Amount	$ 1,891,815	$ 1,885,739
Actual Ratio (percent)	0.1123	0.1028
Minimum for Capital Required - Basel III Amount	$ 673,598	$ 733,785
Minimum for Capital Required - Basel III Ratio (percent)	0.0400	0.0400
To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 841,998	$ 917,231
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (percent)	0.0500	0.0500

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Regulatory Assets [Line Items]
Common stock repurchased	$ 115,322,000	$ 176,000	$ 118,111,000	$ 1,665,000
Common stock purchased to settle employee tax withholding related to vesting of stock awards (shares)	2,344	2,376	28,475	25,211
Common stock purchased to settle employee tax withholding related to vesting of stock awards	$ 169,000	$ 176,000	$ 2,145,000	$ 1,665,000
2022 Share Repurchase Program
Regulatory Assets [Line Items]
Share repurchase program authorized amount					$ 160,000,000
Common stock repurchased (shares)	1,639,792		1,651,236
Common stock repurchased	$ 115,153,000		$ 115,966,000
October 2020 Share Repurchase Program
Regulatory Assets [Line Items]
Common stock repurchased (shares)		0		0

Subsequent Event (Details)

Subsequent Event (Details)	Jul. 22, 2022 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.38