Independent Bank (IBTX) 10-Q 25 Apr 23 2023 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2023	Apr. 21, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
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		41,281,499
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001564618
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 108,178	$ 134,183
Interest-bearing deposits in other banks	940,412	520,139
Cash and cash equivalents	1,048,590	654,322
Certificates of deposit held in other banks	496	496
Securities available for sale, at fair value	1,675,415	1,691,784
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively	206,602	207,059
Loans held for sale (includes $12,989 and $10,612 carried at fair value, respectively)	16,576	11,310
Loans, net of allowance for credit losses of $146,850 and $148,787, respectively	13,859,736	13,760,576
Premises and equipment, net	354,540	355,368
Other real estate owned	22,700	23,900
Federal Home Loan Bank (FHLB) of Dallas stock and other restricted stock	85,408	23,436
Bank-owned life insurance (BOLI)	241,395	240,448
Deferred tax asset	91,269	78,669
Goodwill	994,021	994,021
Other intangible assets, net	59,888	62,999
Other assets	141,718	154,026
Total assets	18,798,354	18,258,414
Deposits:
Noninterest-bearing	4,148,360	4,736,830
Interest-bearing	9,907,327	10,384,587
Total deposits	14,055,687	15,121,417
FHLB advances	1,800,000	300,000
Other borrowings	337,607	267,066
Junior subordinated debentures	54,469	54,419
Other liabilities	199,734	130,129
Total liabilities	16,447,497	15,873,031
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,281,904 and 41,190,677 shares outstanding, respectively)	413	412
Additional paid-in capital	1,961,637	1,959,193
Retained earnings	583,529	638,354
Accumulated other comprehensive loss	(194,722)	(212,576)
Total stockholders’ equity	2,350,857	2,385,383
Total liabilities and stockholders’ equity	$ 18,798,354	$ 18,258,414

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for credit losses, securities held to maturity	$ 0	$ 0
Loans held for sale, fair value option	12,989,000	10,612,000
Allowance for credit losses, loans	$ 146,850,000	$ 148,787,000
Preferred stock, shares outstanding (shares)	0	0
Common stock, shares outstanding (shares)	41,281,904	41,190,677

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income:
Interest and fees on loans	$ 184,294	$ 129,179
Interest on taxable securities	7,858	8,359
Interest on nontaxable securities	2,603	2,333
Interest on interest-bearing deposits and other	6,421	994
Total interest income	201,176	140,865
Interest expense:
Interest on deposits	62,261	5,610
Interest on FHLB advances	5,824	179
Interest on other borrowings	4,079	3,482
Interest on junior subordinated debentures	1,090	446
Total interest expense	73,254	9,717
Net interest income	127,922	131,148
Provision for credit losses	90	(1,443)
Net interest income after provision for credit losses	127,832	132,591
Noninterest income:
Service charges on deposit accounts	3,349	2,752
Investment management fees	2,301	2,451
Mortgage banking revenue	1,624	3,026
Mortgage warehouse purchase program fees	324	958
Loss on sale of loans	0	(1,484)
Gain (loss) on sale and disposal of premises and equipment	47	(163)
Increase in cash surrender value of BOLI	1,377	1,310
Other	3,732	4,035
Total noninterest income	12,754	12,885
Noninterest expense:
Salaries and employee benefits	46,275	49,555
Occupancy	11,559	10,000
Communications and technology	7,090	5,901
FDIC assessment	2,712	1,493
Advertising and public relations	604	456
Other real estate owned expenses, net	(44)	0
Impairment of other real estate	1,200	0
Amortization of other intangible assets	3,111	3,145
Litigation settlement	102,500	0
Professional fees	3,065	3,439
Other	11,308	8,468
Total noninterest expense	189,380	82,457
(Loss) income before taxes	(48,794)	63,019
Income tax (benefit) expense	(11,284)	12,279
Net (loss) income	$ (37,510)	$ 50,740
Basic (loss) earnings per share (usd per share)	$ (0.91)	$ 1.19
Diluted (loss) earnings per share (usd per share)	$ (0.91)	$ 1.18

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (37,510)	$ 50,740
Other comprehensive income (loss) before tax:
Unrealized gains (losses) arising during the period, excluding the change attributable to available for sale securities reclassified to held to maturity	20,771	(106,564)
Tax effect	4,362	(22,378)
Unrealized gains (losses) arising during the period, net of tax, excluding the change attributable to available for sale securities reclassified to held to maturity	16,409	(84,186)
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities	(5)	(5)
Tax effect	(1)	(1)
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities, net of tax	(4)	(4)
Change in unrealized gains (losses) on securities, net of tax	16,405	(84,190)
Unrealized holding gain (losses) arising during the period	940	(4,965)
Tax effect	197	(1,043)
Unrealized gains (losses) arising during the period, net of tax	743	(3,922)
Reclassification of amount of losses (gains) recognized into income	894	(202)
Tax effect	188	(42)
Reclassification of amount of losses (gains) recognized into income, net of tax	706	(160)
Change in unrealized gains (losses) on derivative financial instruments	1,449	(4,082)
Other comprehensive income (loss), net of tax	17,854	(88,272)
Comprehensive loss	$ (19,656)	$ (37,532)

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 (Loss) Income
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 (loss) income	50,740				50,740
Other comprehensive income (loss), net of tax	(88,272)					(88,272)
Common stock repurchased (shares)			(37,575)
Common stock repurchased	(2,789)		$ 0		(2,789)
Restricted stock forfeited (shares)			(715)
Restricted stock granted (shares)			77,284
Restricted stock granted	0		$ 0	0
Stock based compensation expense	2,412			2,412
Cash dividends ($0.38 and $0.38 per share for the three months ended March 31, 2023 and 2022 respectively)	(16,281)				(16,281)
Ending balance at Mar. 31, 2022	2,522,460	0	$ 428	1,947,909	657,154	(83,031)
Ending balance (shares) at Mar. 31, 2022			42,795,228
Beginning balance at Dec. 31, 2022	2,385,383	0	$ 412	1,959,193	638,354	(212,576)
Beginning balance (shares) at Dec. 31, 2022			41,190,677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(37,510)				(37,510)
Other comprehensive income (loss), net of tax	17,854					17,854
Common stock repurchased (shares)			(26,777)
Common stock repurchased	(1,617)		$ 0		(1,617)
Restricted stock forfeited (shares)			(1,763)
Restricted stock forfeited	0		$ 0
Restricted stock granted (shares)			119,767
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	2,445			2,445
Cash dividends ($0.38 and $0.38 per share for the three months ended March 31, 2023 and 2022 respectively)	(15,698)				(15,698)
Ending balance at Mar. 31, 2023	$ 2,350,857	$ 0	$ 413	$ 1,961,637	$ 583,529	$ (194,722)
Ending balance (shares) at Mar. 31, 2023			41,281,904

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Preferred stock par value (usd per share)	$ 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
Common stock par value (usd per share)	$ 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
Dividends paid (usd per share)	$ 0.38	$ 0.38

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net (loss) income	$ (37,510)	$ 50,740
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation expense	4,433	3,292
Accretion income recognized on loans	(1,115)	(4,081)
Amortization of other intangibles assets	3,111	3,145
Amortization of premium on securities, net	1,861	1,645
Amortization of discount and origination costs on borrowings	591	223
Stock based compensation expense	2,445	2,412
Excess tax expense (benefit) on restricted stock vested	85	(354)
FHLB stock dividends	(397)	(31)
(Gain) loss on sale and disposal of premises and equipment	(47)	163
Loss on sale of loans	0	1,484
Impairment of other real estate	1,200	0
Impairment of other assets	802	0
Deferred tax (benefit) expense	(17,347)	4,203
Provision for credit losses	90	(1,443)
Increase in cash surrender value of BOLI	(1,377)	(1,310)
Excess benefit claim on BOLI	(318)	(784)
Net gain on mortgage loans held for sale	(1,209)	(1,407)
Originations of loans held for sale	(56,152)	(90,828)
Proceeds from sale of loans held for sale	52,095	101,616
Net change in other assets	15,058	3,325
Net change in other liabilities	61,952	(50,696)
Net cash provided by operating activities	28,251	21,314
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns, AFS	35,731	3,061,183
Purchases AFS	0	(3,211,644)
Purchases HTM	0	(70,773)
Proceeds from maturities of certificates of deposit held in other banks	0	248
Proceeds from benefit claim of BOLI	748	1,344
Purchases of FHLB stock and other restricted stock	(61,575)	0
Proceeds from redemptions of FHLB stock and other restricted stock	0	33
Proceeds from sale of loans	0	17,506
Net loans originated held for investment	(3,889)	(286,598)
Originations of mortgage warehouse purchase loans	(2,238,118)	(4,600,627)
Proceeds from pay-offs of mortgage warehouse purchase loans	2,149,670	4,819,921
Additions to premises and equipment	(3,746)	(19,441)
Proceeds from sale of premises and equipment	188	9
Net cash used in investing activities	(120,991)	(288,839)
Cash flows from financing activities:
Net decrease in demand deposits, money market and savings accounts	(1,500,907)	(550,396)
Net increase (decrease) in time deposits	435,177	(153,241)
Proceeds from FHLB advances	3,350,000	0
Repayments of FHLB advances	(1,850,000)	0
Proceeds from other borrowings	100,000	3,000
Repayments of other borrowings	(30,000)	(17,000)
Repurchase of common stock	(1,617)	(2,789)
Dividends paid	(15,645)	(16,237)
Net cash provided by (used in) financing activities	487,008	(736,663)
Net change in cash and cash equivalents	394,268	(1,004,188)
Cash and cash equivalents at beginning of period	654,322	2,608,444
Cash and cash equivalents at end of period	$ 1,048,590	$ 1,604,256

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2023
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, 2022. The consolidated balance sheet at December 31, 2022 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. Goodwill assessment : The Company's policy is to test goodwill for impairment annually on December 31 or on an interim basis if an event triggering impairment may have occurred. During the period ended March 31, 2023, the economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering indicator requiring an interim goodwill impairment quantitative analysis. Based on an analysis performed, the Company's estimated fair value to a market participant as of March 31, 2023, exceeded its carrying amount resulting in no impairment charge for the period. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes. Adoption of new accounting standards : ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method . Under prior guidance, entities can apply the last-of-layer hedging method to hedge the exposure of a closed portfolio of prepayable financial assets to fair value changes due to changes in interest rates for a portion of the portfolio that is not expected to be affected by prepayments, defaults, and other events affecting the timing and amount of cash flows. ASU 2022-01 expands the last-of-layer method, which permits only one hedge layer, to allow multiple hedged layers of a single closed portfolio. To reflect that expansion, the last-of-layer method is renamed the portfolio layer method. ASU 2022-01 also (i) expands the scope of the portfolio layer method to include non-prepayable financial assets, (ii) specifies eligible hedging instruments in a single-layer hedge, (iii) provides additional guidance on the accounting for and disclosure of hedge basis adjustments under the portfolio layer method and (iv) specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. The Company adopted ASU 2022-01 on January 1, 2023 and the adoption did not have a significant impact on the financial statements. ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in ASC Subtopic 310-40, Receivables -Troubled Debt Restructurings by Creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of ASC Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost . The Company adopted ASU 2022-02 on a modified retrospective basis on January 1, 2023. The adoption did not have a significant impact on the financial statements. 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 13. Subsequent Events . Earnings (loss) per share: Basic earnings (loss) per common share is calculated as net income (loss) 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 (loss) 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 months ended March 31, 2023 and 2022. 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 (loss) income available to common shareholders and the number of shares used in the calculation of basic and diluted (loss) earnings per common share: Three Months Ended March 31, 2023 2022 Basic (loss) earnings per share: Net (loss) income $ (37,510) $ 50,740 Less: Undistributed (loss) earnings allocated to participating securities (206) 266 Dividends paid on participating securities 61 125 Net (loss) income available to common shareholders $ (37,365) $ 50,349 Weighted average basic shares outstanding 41,063,527 42,438,857 Basic (loss) earnings per share $ (0.91) $ 1.19 Diluted (loss) earnings per share: Net (loss) income available to common shareholders $ (37,365) $ 50,349 Total weighted average basic shares outstanding 41,063,527 42,438,857 Add dilutive performance stock units 93,422 73,392 Total weighted average diluted shares outstanding 41,156,949 42,512,249 Diluted (loss) earnings per share $ (0.91) $ 1.18 Anti-dilutive participating securities 58,891 145,219

Cash Flows

Cash Flows	3 Months Ended
	Mar. 31, 2023
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: Three Months Ended March 31, 2023 2022 Cash transactions: Interest expense paid $ 72,029 $ 12,457 Income taxes paid $ 20 $ 30 Noncash transactions: Deferred dividend equivalents $ 53 $ 44 Transfer of securities available for sale to held to maturity $ — $ 117,583 Securities purchased, not yet settled $ — $ 7,026 Right-of-use assets obtained in exchange for lease liabilities $ 3,556 $ 3,882 Loans purchased, not yet settled $ 4,987 $ 36,383

Securities

Securities	3 Months Ended
	Mar. 31, 2023
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 March 31, 2023 and December 31, 2022 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale March 31, 2023 U.S. treasuries $ 249,309 $ — $ (17,260) $ 232,049 Government agency securities 468,934 — (80,457) 388,477 Obligations of state and municipal subdivisions 257,409 317 (10,152) 247,574 Corporate bonds 43,000 — (6,239) 36,761 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 893,934 7 (124,087) 769,854 Other securities 700 — — 700 $ 1,913,286 $ 324 $ (238,195) $ 1,675,415 December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 Securities Held to Maturity March 31, 2023 Obligations of state and municipal subdivisions $ 206,602 $ 143 $ (38,994) $ 167,751 December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $6,759 and $7,702 on available for sale and $914 and $2,697 on held to maturity securities at March 31, 2023 and December 31, 2022, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. During 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. There have been no transfers of securities in 2023. The amortized cost and estimated fair value of securities at March 31, 2023, 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. March 31, 2023 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 53,976 $ 53,208 $ — $ — Due from one year to five years 313,724 296,280 — — Due from five to ten years 467,003 399,742 — — Thereafter 184,649 156,331 206,602 167,751 1,019,352 905,561 206,602 167,751 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 893,934 769,854 — — $ 1,913,286 $ 1,675,415 $ 206,602 $ 167,751 ____________ (1) Excludes accrued interest receivable of $6,759 on available for sale and $914 on held to maturity securities at March 31, 2023, that is recorded in other assets on the accompanying consolidated balance sheets. Securities with a fair value of approximately $876,379 and $1,168,006 at March 31, 2023 and December 31, 2022, respectively, were pledged primarily to secure deposits. There were no sales of securities during the three months ended March 31, 2023 and 2022. 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 March 31, 2023 and December 31, 2022, 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 March 31, 2023 U.S. treasuries 2 $ 17,031 $ (502) 33 $ 215,018 $ (16,758) $ 232,049 $ (17,260) Government agency securities 1 4,877 (135) 74 383,600 (80,322) 388,477 (80,457) Obligations of state and municipal subdivisions 119 81,043 (487) 186 117,227 (9,665) 198,270 (10,152) Corporate bonds 3 11,885 (3,115) 8 21,876 (3,124) 33,761 (6,239) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 29 47,406 (2,151) 324 721,961 (121,936) 769,367 (124,087) 154 $ 162,242 $ (6,390) 625 $ 1,459,682 $ (231,805) $ 1,621,924 $ (238,195) December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) Securities Held to Maturity March 31, 2023 Obligations of state and municipal subdivisions 3 $ 12,816 $ (385) 39 $ 147,723 $ (38,609) $ 160,539 $ (38,994) December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820) 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 March 31, 2023 , 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. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. As such, there is no allowance for credit losses on available for sale securities recognized as of March 31, 2023 . 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 March 31, 2023 , 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 March 31, 2023 .

Loans, Net and Allowance for Cr

Loans, Net and Allowance for Credit Losses on Loans	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Loans, Net and Allowance for Loan Losses	Note 4. Loans, Net and Allowance for Credit Losses on Loans Loans, net, at March 31, 2023 and December 31, 2022, consisted of the following: March 31, December 31, 2023 2022 Commercial $ 2,171,635 $ 2,240,959 Mortgage warehouse purchase loans 400,547 312,099 Real estate: Commercial 7,950,480 7,817,447 Commercial construction, land and land development 1,178,525 1,231,071 Residential 1,611,908 1,592,859 Single-family interim construction 487,421 508,839 Agricultural 121,958 124,422 Consumer 84,112 81,667 Total loans (1) 14,006,586 13,909,363 Allowance for credit losses (146,850) (148,787) Total loans, net (1) $ 13,859,736 $ 13,760,576 ____________ (1) Excludes accrued interest receivable of $47,170 and $48,815 at March 31, 2023 and December 31, 2022, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. Loans with carrying amounts of $7,432,017 and $7,246,087 at March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022, there were approximately $549,895 and $574,698, of energy related loans outstanding, respectively. Under the CARES Act Paycheck Protection Program (PPP) administered by the Small Business Administration (SBA), the Company originated 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 March 31, 2023, 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 March 31, 2023, 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 March 31, 2023 and December 31, 2022, there were no concentrations of loans related to a single industry in excess of 10% of total loans. 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. 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 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. Following unprecedented declines caused by the pandemic and volatile energy prices, the Texas economy, specifically in the Company’s lending areas of north, central and southeast Texas, continued to expand modestly through the first quarter of 2023. The Colorado economy fell slightly. Growth picked up slightly in the service sector. Retail sales, home sales and manufacturing output and demand declined. Rising interest rates further weakens loan demand, including renewals of existing loans. Agricultural conditions and housing market activity improved. Outlooks are mostly negative, and uncertainty remains high amid concerns of weakening demand, inflation and high interest rates. The implications for the U.S. economy are highly uncertain, and the war in Ukraine and related events have created additional upward pressure on inflation and are weighing on economic activity. Inflation remains elevated, reflecting supply and demand imbalances, higher food and energy prices and broader price pressures. The risk of loss associated with all segments of the portfolio could increase due to these factors. 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 months ended March 31, 2023 and 2022: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended March 31, 2023 Balance at beginning of period $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ 148,787 Provision for credit losses (895) (1,969) 831 1,330 (5) 24 (37) (721) Charge-offs (48) — (1,196) — — — — (1,244) Recoveries 28 — — — — — — 28 Balance at end of period $ 53,122 $ 59,109 $ 17,331 $ 4,780 $ 11,812 $ 231 $ 465 $ 146,850 Three months ended March 31, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ 148,706 Provision for credit losses 915 (5,411) 1,243 584 527 26 (84) (2,200) Charge-offs (441) — — (6) — — (10) (457) Recoveries 264 — — — — — — 264 Balance at end of period $ 50,485 $ 59,699 $ 25,104 $ 2,770 $ 7,749 $ 132 $ 374 $ 146,313 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 that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 22,244 $ 8,767 $ 21,981 $ 8,378 Commercial real estate 12,303 1,209 12,303 1,209 Commercial construction, land and land development — — — — Residential real estate — — — — Single-family interim construction 189 60 189 43 Agricultural — — — — Consumer — — — — $ 34,736 $ 10,036 $ 34,473 $ 9,630 Nonperforming loans by loan class at March 31, 2023 and December 31, 2022 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total March 31, 2023 Nonaccrual loans (1) $ 22,274 $ 13,340 $ 13 $ 1,431 $ 189 $ — $ 7 $ 37,254 Loans past due 90 days and still accruing 26 — — 1 — 20 — 47 Total nonperforming loans (2) $ 22,300 $ 13,340 $ 13 $ 1,432 $ 189 $ 20 $ 7 $ 37,301 December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 Total nonperforming loans $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 ____________ (1) There are $2,696 and $125 in loans on nonaccrual without an allowance for credit loss as of March 31, 2023 and December 31, 2022, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three months ended March 31, 2023 and 2022. (2) With the adoption of ASU 2022-02, effective January 1, 2023, TDR accounting has been eliminated. 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. Occasionally, the Company modifies loans to borrowers in financial distress by providing certain concessions, such as principal forgiveness, term extension, an other-than-insignificant payment delay, an interest rate reduction, or a combination of such concessions. When principal forgiveness is provided, the amount of forgiveness is charged-off against the allowance for credit losses. Upon the Company's determination that a modified loan (or portion of a loan) has subsequently been deemed uncollectible, the loan (or portion of the loan) is written off. During the three months ended March 31, 2023, the Company did not provide any modifications under these circumstances to borrowers experiencing financial difficulty. 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 March 31, 2023 and as of December 31, 2022: Loans Loans Total Past Current Total March 31, 2023 Commercial $ 5,196 $ 868 $ 6,064 $ 2,165,571 $ 2,171,635 Mortgage warehouse purchase loans — — — 400,547 400,547 Commercial real estate 5,055 12,312 17,367 7,933,113 7,950,480 Commercial construction, land and land development 3 — 3 1,178,522 1,178,525 Residential real estate 5,551 213 5,764 1,606,144 1,611,908 Single-family interim construction 232 189 421 487,000 487,421 Agricultural 2 20 22 121,936 121,958 Consumer 166 4 170 83,942 84,112 $ 16,205 $ 13,606 $ 29,811 $ 13,976,775 $ 14,006,586 December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363 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 March 31, 2023 and December 31, 2022: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 26,447 $ 287,208 $ 324,143 $ 116,966 $ 97,533 $ 187,813 $ 1,003,086 $ 117 $ 2,043,313 Pass/Watch 20 323 17,588 146 95 9,657 21,777 — 49,606 Special Mention — 275 4,390 97 1,387 4,954 7,696 — 18,799 Substandard 7,883 8,289 25,699 369 3,420 2,298 7,674 3,784 59,416 Doubtful — — 501 — — — — — 501 Loss — — — — — — — — — Total commercial $ 34,350 $ 296,095 $ 372,321 $ 117,578 $ 102,435 $ 204,722 $ 1,040,233 $ 3,901 $ 2,171,635 Current period gross write-offs $ — $ — $ 39 $ 5 $ 4 $ — $ — $ — $ 48 Mortgage warehouse purchase loans Pass $ 400,547 $ — $ — $ — $ — $ — $ — $ — $ 400,547 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 400,547 $ — $ — $ — $ — $ — $ — $ — $ 400,547 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial real estate Pass $ 215,732 $ 2,663,274 $ 2,025,047 $ 960,129 $ 587,065 $ 1,008,798 $ 66,531 $ 1,468 $ 7,528,044 Pass/Watch 7,478 92,496 21,993 35,838 20,436 71,606 139 — 249,986 Special Mention 3,742 15,740 38,119 — 10,804 25,514 360 — 94,279 Substandard 903 3,482 39,879 8,481 3,150 22,276 — — 78,171 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 227,855 $ 2,774,992 $ 2,125,038 $ 1,004,448 $ 621,455 $ 1,128,194 $ 67,030 $ 1,468 $ 7,950,480 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial construction, land and land development Pass $ 76,061 $ 546,078 $ 383,235 $ 111,534 $ 7,920 $ 29,430 $ 14,670 $ — $ 1,168,928 Pass/Watch 14 1,872 40 6,972 — 68 — — 8,966 Special Mention — 588 — — — — — — 588 Substandard — 27 — — 3 13 — — 43 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 76,075 $ 548,565 $ 383,275 $ 118,506 $ 7,923 $ 29,511 $ 14,670 $ — $ 1,178,525 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 33,820 $ 527,494 $ 368,984 $ 234,064 $ 151,146 $ 215,597 $ 62,483 $ 202 $ 1,593,790 Pass/Watch 757 370 892 2,822 1,531 1,987 387 — 8,746 Special Mention — 2,239 — — 698 1,399 127 — 4,463 Substandard — 1,152 — 528 219 2,924 86 — 4,909 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 34,577 $ 531,255 $ 369,876 $ 237,414 $ 153,594 $ 221,907 $ 63,083 $ 202 $ 1,611,908 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 76,183 $ 319,555 $ 78,071 $ — $ — $ — $ 13,423 $ — $ 487,232 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — 189 — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 76,183 $ 319,555 $ 78,260 $ — $ — $ — $ 13,423 $ — $ 487,421 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Agricultural Pass $ 7,312 $ 49,992 $ 24,157 $ 12,560 $ 3,643 $ 12,772 $ 9,040 $ — $ 119,476 Pass/Watch — 2,463 — — — — — — 2,463 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 7,312 $ 52,455 $ 24,157 $ 12,560 $ 3,643 $ 12,791 $ 9,040 $ — $ 121,958 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Consumer Pass $ 2,660 $ 6,512 $ 3,983 $ 8,839 $ 1,446 $ 270 $ 60,353 $ 40 $ 84,103 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — 3 — — 6 — — 9 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 2,660 $ 6,512 $ 3,986 $ 8,839 $ 1,446 $ 276 $ 60,353 $ 40 $ 84,112 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Total loans Pass $ 838,762 $ 4,400,113 $ 3,207,620 $ 1,444,092 $ 848,753 $ 1,454,680 $ 1,229,586 $ 1,827 $ 13,425,433 Pass/Watch 8,269 97,524 40,513 45,778 22,062 83,318 22,303 — 319,767 Special Mention 3,742 18,842 42,509 97 12,889 31,867 8,183 — 118,129 Substandard 8,786 12,950 65,770 9,378 6,792 27,536 7,760 3,784 142,756 Doubtful — — 501 — — — — — 501 Loss — — — — — — — — — Total loans $ 859,559 $ 4,529,429 $ 3,356,913 $ 1,499,345 $ 890,496 $ 1,597,401 $ 1,267,832 $ 5,611 $ 14,006,586 Current period gross write-offs $ — $ — $ 1,235 $ 5 $ 4 $ — $ — $ — $ 1,244 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial real estate Pass $ 2,652,298 $ 1,980,631 $ 998,910 $ 617,664 $ 448,758 $ 640,275 $ 59,184 $ 9,222 $ 7,406,942 Pass/Watch 90,313 25,954 33,664 18,678 53,469 25,831 — — 247,909 Special Mention 10,180 41,193 — 10,870 8,722 10,735 — 26 81,726 Substandard 3,513 40,001 8,574 3,178 8,268 17,336 — — 80,870 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 2,756,304 $ 2,087,779 $ 1,041,148 $ 650,390 $ 519,217 $ 694,177 $ 59,184 $ 9,248 $ 7,817,447 Commercial construction, land and land development Pass $ 553,376 $ 465,272 $ 126,704 $ 10,477 $ 23,073 $ 12,188 $ 12,705 $ 4,018 $ 1,207,813 Pass/Watch 8,036 43 10,297 — — 72 — — 18,448 Special Mention 1,313 674 — — — — — — 1,987 Substandard 28 2,771 — 10 — 14 — — 2,823 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 562,753 $ 468,760 $ 137,001 $ 10,487 $ 23,073 $ 12,274 $ 12,705 $ 4,018 $ 1,231,071 Residential real estate Pass $ 525,631 $ 379,789 $ 220,077 $ 155,460 $ 79,437 $ 154,875 $ 59,332 $ 1,238 $ 1,575,839 Pass/Watch 373 918 642 1,743 76 3,312 302 — 7,366 Special Mention 2,267 — — 700 227 1,224 126 — 4,544 Substandard 708 455 538 219 — 2,997 193 — 5,110 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 528,979 $ 381,162 $ 221,257 $ 158,122 $ 79,740 $ 162,408 $ 59,953 $ 1,238 $ 1,592,859 Single-family interim construction Pass $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ — $ 16,447 $ — $ 492,177 Pass/Watch 16,471 — — — — — 2 — 16,473 Special Mention — — — — — — — — — Substandard — 189 — — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 367,502 $ 105,762 $ 18,885 $ — $ 241 $ — $ 16,449 $ — $ 508,839 Agricultural Pass $ 52,525 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,872 $ 10,588 $ — $ 120,155 Pass/Watch 2,700 — — — — — 1,547 — 4,247 Special Mention — — — — — — — — — Substandard — — — — — 20 — — 20 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 55,225 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,892 $ 12,135 $ — $ 124,422 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Consumer Pass $ 7,715 $ 4,909 $ 7,959 $ 1,576 $ 300 $ 81 $ 59,113 $ — $ 81,653 Pass/Watch — — — — — — — — — Special Mention —

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	3 Months Ended
	Mar. 31, 2023
Advance from Federal Home Loan Bank [Abstract]
Federal Home Loan Bank Advances	Note 5. Federal Home Loan Bank Advances At March 31, 2023, the Company has advances from the FHLB of Dallas under note payable arrangements with maturities ranging from April 2023 to September 2032. Interest payments on these notes are made monthly. The weighted average interest rate of all notes was 4.98% and 2.42% at March 31, 2023 and December 31, 2022, respectively. The balances outstanding on these advances were $1,800,000 and $300,000 at March 31, 2023 and December 31, 2022, respectively. Contractual maturities of FHLB advances at March 31, 2023 were as follows: First year $ 1,725,000 Second year — Third year — Fourth year — Fifth year — Thereafter 75,000 $ 1,800,000 The advances are secured by $82,156 of FHLB stock owned by the Company and a blanket lien on certain loans along with specific listed loans for an aggregate available carrying value of $6,103,264 at March 31, 2023. The Company had remaining credit available under the FHLB advance program of $2,938,693 at March 31, 2023. At March 31, 2023, the Company had $1,354,265 in undisbursed advance commitments (letters of credit) with the FHLB. As of March 31, 2023, these commitments mature on various dates from April 2023 through February 2025. The FHLB letters of credit were obtained in lieu of pledging securities to secure public fund deposits that are over the FDIC insurance limit. At March 31, 2023, there were no disbursements against the advance commitments.

Other Borrowings

Other Borrowings	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Other Borrowings	Note 6. Other Borrowings Other borrowings totaled $337,607 and $267,066 at March 31, 2023 and December 31, 2022, respectively. On March 31, 2023, the Company redeemed $30,000 of its outstanding 5.00% fixed-to-floating rate subordinated debentures due December 31, 2027.

Off-Balance Sheet Arrangements,

Off-Balance Sheet Arrangements, Commitments and Contingencies	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Arrangements, Commitments and Contingencies	Note 7. 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 March 31, 2023 and December 31, 2022, the approximate amounts of these financial instruments were as follows: March 31, December 31, 2023 2022 Commitments to extend credit $ 3,138,593 $ 3,291,409 Standby letters of credit 24,148 24,135 $ 3,162,741 $ 3,315,544 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 March 31, 2023 2022 Balance at beginning of period $ 3,944 $ 4,722 Provision for off-balance sheet credit exposure 811 757 Balance at end of period $ 4,755 $ 5,479 Litigation 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). On February 27, 2023, the Bank entered into a settlement in principle with the plaintiffs and executed a settlement agreement on March 7, 2023. Pending court approval, including entry of certain bar orders as described in the settlement agreement, the Bank will make a one-time cash payment of $100,000 to the court appointed receiver to settle the case and to resolve all current and potential future claims. Such settlement, which is expected to be paid in third quarter 2023, is recognized as litigation settlement expense on the accompanying income statement as well as $2,500 in contingent legal and other fees associated with the litigation and settlement. In addition, the Company is involved in other 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.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Note 8. Income Taxes Income tax (benefit) expense for the three months ended March 31, 2023 and 2022 was as follows: Three Months Ended March 31, 2023 2022 Income tax (benefit) expense for the period $ (11,284) $ 12,279 Effective tax rate 23.1 % 19.5 %

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 9. 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 10. 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 March 31, 2023 and December 31, 2022 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant March 31, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 232,049 $ — $ 232,049 $ — Government agency securities 388,477 — 388,477 — Obligations of state and municipal subdivisions 247,574 — 247,574 — Corporate bonds 36,761 — 36,761 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 769,854 — 769,854 — Other securities 700 — 700 — Loans held for sale, fair value option elected (1) 12,989 — 12,989 — Derivative financial instruments: Interest rate lock commitments 471 — 471 — Forward mortgage-backed securities trades 5 — 5 — Loan customer counterparty 81 — 81 — Financial institution counterparty 10,938 — 10,938 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 9,444 — 9,444 — Interest rate lock commitments 1 — 1 — Forward mortgage-backed securities trades 122 — 122 — Loan customer counterparty 10,821 — 10,821 — Financial institution counterparty 90 — 90 — December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — __________ (1) At March 31, 2023 and December 31, 2022, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $12,604 and $10,330, 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 March 31, 2023. 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 10, 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 March 31, 2023 and December 31, 2022, 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 March 31, 2023 Assets: Individually evaluated loans $ 86 $ — $ — $ 86 $ 18 Other real estate owned 22,700 — — 22,700 1,200 December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548 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. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. 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. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. 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 March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant March 31, 2023 Financial assets: Cash and cash equivalents $ 1,048,590 $ 1,048,590 $ 1,048,590 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 206,602 167,751 — 167,751 — Loans held for sale, at cost 3,587 3,649 — 3,649 — Loans, net 13,859,736 13,632,771 — — 13,632,771 FHLB of Dallas stock and other restricted stock 85,408 85,408 — 85,408 — Accrued interest receivable 55,882 55,882 — 55,882 — Financial liabilities: Deposits 14,055,687 14,007,690 — 14,007,690 — Accrued interest payable 10,829 10,829 — 10,829 — FHLB advances 1,800,000 1,788,372 — 1,788,372 — Other borrowings 337,607 323,500 — 323,500 — Junior subordinated debentures 54,469 59,761 — 59,761 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — 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	3 Months Ended
	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 10. 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 for 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. The Company has 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 months ended March 31, 2023. 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 gains recognized in accumulated other comprehensive income related to derivatives was $743, net of tax, and the amounts of losses that were reclassified to interest income as interest payments were made on the Company’s variable-rate loans was $706, net of tax, during and for the three months ended March 31, 2023. Amounts of losses recognized in accumulated other comprehensive income related to derivatives was $3,922, 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 $160, net of tax, during and for the three months ended March 31, 2022. During the next twelve months, the Company estimates that $3,696 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 March 31, 2023 and December 31, 2022: Outstanding Notional Balance Asset Derivative Liability Derivative March 31, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 9,444 Derivatives not designated as hedging instruments: Interest rate lock commitments 19,836 471 1 Forward mortgage-backed securities trades 21,750 5 122 Commercial loan interest rate swaps: Loan customer counterparty 182,305 81 10,821 Financial institution counterparty 182,305 10,938 90 December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 — The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate March 31, 2023 December 31, 2022 Received Paid Received Paid Loan customer counterparty 4.21 % 7.14 % 4.12 % 6.72 % The credit exposure related to interest rate swaps is limited to the net favorable value of all swaps by each counterparty, which was approximately $11,019 and $13,968 at March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022, cash of $10,909 and $10,394 and securities of $486 and $509 were pledged as collateral for these derivatives, respectively, and counterparties had deposited $2,730 of cash with the Company as of March 31, 2023. 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 March 31, 2023. 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 $9,014 at March 31, 2023. 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 months ended March 31, 2023 and 2022 is as follows: Income Statement Location Three Months Ended March 31, 2023 2022 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (899) $ 197 Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 182 (381) Forward mortgage-backed securities trades Mortgage banking revenue (204) 447

Stock Awards

Stock Awards	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Stock Awards	Note 11. 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 March 31, 2023, there were 1,367,851 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 Restricted Stock Awards The following table summarizes the activity in nonvested restricted stock awards for the three months ended March 31, 2023 and 2022: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2022 309,015 $ 60.12 Granted during the period 119,767 60.21 Vested during the period (92,830) 64.55 Forfeited during the period (1,763) 63.23 Nonvested shares, March 31, 2023 334,189 $ 58.91 Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 77,284 73.94 Vested during the period (91,224) 57.55 Forfeited during the period (715) 67.56 Nonvested shares, March 31, 2022 348,896 $ 56.57 Compensation expense related to these awards is recorded based on the fair value of the award at the date of grant and totaled $1,959 and $2,026 for the three months ended March 31, 2023 and 2022, respectively. Compensation expense is recorded in salaries and employee benefits in the accompanying consolidated statements of income. At March 31, 2023, future compensation expense is estimated to be $16,800 and will be recognized over a remaining weighted average period of 2.46 years. The fair value of common stock awards that vested during the three months ended March 31, 2023 and 2022 was $5,605 and $6,903, respectively. The Company has recorded $85 and $(354) in excess tax expense (benefit) on vested restricted stock to income tax expense for the three months ended March 31, 2023 and 2022, respectively. There were no modifications of stock agreements during the three months ended March 31, 2023 and 2022 that resulted in significant additional incremental compensation costs. At March 31, 2023, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 145,054 Second year 116,105 Third year 59,490 Fourth year 13,540 Total nonvested shares 334,189 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 three months ended March 31, 2023 and 2022: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2022 140,240 $ 49.20 Granted during the period 37,938 60.21 Nonvested shares, March 31, 2023 178,178 $ 51.55 Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, March 31, 2022 135,240 $ 48.53 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 $486 and $386 for the three months ended March 31, 2023 and 2022, respectively. As of March 31, 2023, the unrecognized compensation expense assuming the target attainment is estimated to be $4,685, while the estimated maximum payout is $9,545 . The remaining performance period over which the expense will be recognized is 2.31 years.

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2023
Regulated Operations [Abstract]
Regulatory Matters	Note 12. 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 March 31, 2023 and December 31, 2022, the Company and the Bank meet all capital adequacy requirements to which they are subject, including the capital buffer requirement. As of March 31, 2023 and December 31, 2022, 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 and required capital ratios under Basel III Capital Rules for the Company and Bank as of March 31, 2023 and December 31, 2022. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio March 31, 2023 Total capital to risk weighted assets: Consolidated $ 1,857,290 11.88 % $ 1,641,617 10.50 % $ 1,563,445 10.00 % Bank 2,032,009 13.00 1,641,162 10.50 1,563,011 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,571,885 10.05 1,328,928 8.50 938,067 6.00 Bank 1,898,604 12.15 1,328,559 8.50 1,250,409 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,516,285 9.70 1,094,411 7.00 N/A N/A Bank 1,898,604 12.15 1,094,108 7.00 1,015,957 6.50 Tier 1 capital to average assets: Consolidated 1,571,885 9.01 697,990 4.00 N/A N/A Bank 1,898,604 10.88 697,805 4.00 872,256 5.00 December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum. 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 January 2023, the Company's Board established the 2023 Stock Repurchase Plan (2023 Plan), which provided for the repurchase of up to $125,000 of common stock through December 31, 2023. There were no shares repurchased under the 2023 Plan during the three months ended March 31, 2023. The Company repurchased 11,444 shares at a total cost of $813 for the three months ended March 31, 2022 under the 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. Company stock repurchased to settle employee tax withholding related to vesting of stock awards totaled 26,777 and 26,131 shares at a total cost of $1,617 and $1,976 for the three months ended March 31, 2023 and March 31, 2022, respectively, and were not included under the repurchase program.

Subsequent Event

Subsequent Event	3 Months Ended
	Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Event	Note 13. Subsequent Events Declaration of Dividends On April 20, 2023, the Company declared a quarterly cash dividend in the amount of $0.38 per share of common stock to the stockholders of record on May 4, 2023. The dividend will be paid on May 18, 2023.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2023
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, 2022. The consolidated balance sheet at December 31, 2022 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.
Goodwill assessment	Goodwill assessment : The Company's policy is to test goodwill for impairment annually on December 31 or on an interim basis if an event triggering impairment may have occurred. During the period ended March 31, 2023, the economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering indicator requiring an interim goodwill impairment quantitative analysis. Based on an analysis performed, the Company's estimated fair value to a market participant as of March 31, 2023, exceeded its carrying amount resulting in no impairment charge for the period. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes.
New accounting standard	Adoption of new accounting standards : ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method . Under prior guidance, entities can apply the last-of-layer hedging method to hedge the exposure of a closed portfolio of prepayable financial assets to fair value changes due to changes in interest rates for a portion of the portfolio that is not expected to be affected by prepayments, defaults, and other events affecting the timing and amount of cash flows. ASU 2022-01 expands the last-of-layer method, which permits only one hedge layer, to allow multiple hedged layers of a single closed portfolio. To reflect that expansion, the last-of-layer method is renamed the portfolio layer method. ASU 2022-01 also (i) expands the scope of the portfolio layer method to include non-prepayable financial assets, (ii) specifies eligible hedging instruments in a single-layer hedge, (iii) provides additional guidance on the accounting for and disclosure of hedge basis adjustments under the portfolio layer method and (iv) specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. The Company adopted ASU 2022-01 on January 1, 2023 and the adoption did not have a significant impact on the financial statements. ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in ASC Subtopic 310-40, Receivables -Troubled Debt Restructurings by Creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of ASC Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost . The Company adopted ASU 2022-02 on a modified retrospective basis on January 1, 2023. The adoption did not have a significant impact on the financial statements.
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 13. Subsequent Events .
Earnings per share	Earnings (loss) per share: Basic earnings (loss) per common share is calculated as net income (loss) 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 (loss) 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 months ended March 31, 2023 and 2022. 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.
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 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 10, 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. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. 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. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. 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 January 2023, the Company's Board established the 2023 Stock Repurchase Plan (2023 Plan), which provided for the repurchase of up to $125,000 of common stock through December 31, 2023. There were no shares repurchased under the 2023 Plan during the three months ended March 31, 2023. The Company repurchased 11,444 shares at a total cost of $813 for the three months ended March 31, 2022 under the 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)	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
Earning Per Share	The following table presents a reconciliation of net (loss) income available to common shareholders and the number of shares used in the calculation of basic and diluted (loss) earnings per common share: Three Months Ended March 31, 2023 2022 Basic (loss) earnings per share: Net (loss) income $ (37,510) $ 50,740 Less: Undistributed (loss) earnings allocated to participating securities (206) 266 Dividends paid on participating securities 61 125 Net (loss) income available to common shareholders $ (37,365) $ 50,349 Weighted average basic shares outstanding 41,063,527 42,438,857 Basic (loss) earnings per share $ (0.91) $ 1.19 Diluted (loss) earnings per share: Net (loss) income available to common shareholders $ (37,365) $ 50,349 Total weighted average basic shares outstanding 41,063,527 42,438,857 Add dilutive performance stock units 93,422 73,392 Total weighted average diluted shares outstanding 41,156,949 42,512,249 Diluted (loss) earnings per share $ (0.91) $ 1.18 Anti-dilutive participating securities 58,891 145,219

Cash Flows (Tables)

Cash Flows (Tables)	3 Months Ended
	Mar. 31, 2023
Supplemental Cash Flow Elements [Abstract]
Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Three Months Ended March 31, 2023 2022 Cash transactions: Interest expense paid $ 72,029 $ 12,457 Income taxes paid $ 20 $ 30 Noncash transactions: Deferred dividend equivalents $ 53 $ 44 Transfer of securities available for sale to held to maturity $ — $ 117,583 Securities purchased, not yet settled $ — $ 7,026 Right-of-use assets obtained in exchange for lease liabilities $ 3,556 $ 3,882 Loans purchased, not yet settled $ 4,987 $ 36,383

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2023
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 March 31, 2023 and December 31, 2022 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale March 31, 2023 U.S. treasuries $ 249,309 $ — $ (17,260) $ 232,049 Government agency securities 468,934 — (80,457) 388,477 Obligations of state and municipal subdivisions 257,409 317 (10,152) 247,574 Corporate bonds 43,000 — (6,239) 36,761 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 893,934 7 (124,087) 769,854 Other securities 700 — — 700 $ 1,913,286 $ 324 $ (238,195) $ 1,675,415 December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 Securities Held to Maturity March 31, 2023 Obligations of state and municipal subdivisions $ 206,602 $ 143 $ (38,994) $ 167,751 December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $6,759 and $7,702 on available for sale and $914 and $2,697 on held to maturity securities at March 31, 2023 and December 31, 2022, respectively, 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 March 31, 2023, 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. March 31, 2023 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 53,976 $ 53,208 $ — $ — Due from one year to five years 313,724 296,280 — — Due from five to ten years 467,003 399,742 — — Thereafter 184,649 156,331 206,602 167,751 1,019,352 905,561 206,602 167,751 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 893,934 769,854 — — $ 1,913,286 $ 1,675,415 $ 206,602 $ 167,751 ____________ (1) Excludes accrued interest receivable of $6,759 on available for sale and $914 on held to maturity securities at March 31, 2023, that is recorded in other assets on the accompanying consolidated balance sheets.
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 March 31, 2023 and December 31, 2022, 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 March 31, 2023 U.S. treasuries 2 $ 17,031 $ (502) 33 $ 215,018 $ (16,758) $ 232,049 $ (17,260) Government agency securities 1 4,877 (135) 74 383,600 (80,322) 388,477 (80,457) Obligations of state and municipal subdivisions 119 81,043 (487) 186 117,227 (9,665) 198,270 (10,152) Corporate bonds 3 11,885 (3,115) 8 21,876 (3,124) 33,761 (6,239) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 29 47,406 (2,151) 324 721,961 (121,936) 769,367 (124,087) 154 $ 162,242 $ (6,390) 625 $ 1,459,682 $ (231,805) $ 1,621,924 $ (238,195) December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) Securities Held to Maturity March 31, 2023 Obligations of state and municipal subdivisions 3 $ 12,816 $ (385) 39 $ 147,723 $ (38,609) $ 160,539 $ (38,994) December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820)

Loans, Net and Allowance for _2

Loans, Net and Allowance for Credit Losses on Loans (Tables)	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Compositions of Loans	Loans, net, at March 31, 2023 and December 31, 2022, consisted of the following: March 31, December 31, 2023 2022 Commercial $ 2,171,635 $ 2,240,959 Mortgage warehouse purchase loans 400,547 312,099 Real estate: Commercial 7,950,480 7,817,447 Commercial construction, land and land development 1,178,525 1,231,071 Residential 1,611,908 1,592,859 Single-family interim construction 487,421 508,839 Agricultural 121,958 124,422 Consumer 84,112 81,667 Total loans (1) 14,006,586 13,909,363 Allowance for credit losses (146,850) (148,787) Total loans, net (1) $ 13,859,736 $ 13,760,576 ____________
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 months ended March 31, 2023 and 2022: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended March 31, 2023 Balance at beginning of period $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ 148,787 Provision for credit losses (895) (1,969) 831 1,330 (5) 24 (37) (721) Charge-offs (48) — (1,196) — — — — (1,244) Recoveries 28 — — — — — — 28 Balance at end of period $ 53,122 $ 59,109 $ 17,331 $ 4,780 $ 11,812 $ 231 $ 465 $ 146,850 Three months ended March 31, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ 148,706 Provision for credit losses 915 (5,411) 1,243 584 527 26 (84) (2,200) Charge-offs (441) — — (6) — — (10) (457) Recoveries 264 — — — — — — 264 Balance at end of period $ 50,485 $ 59,699 $ 25,104 $ 2,770 $ 7,749 $ 132 $ 374 $ 146,313
Individually Evaluated Loans	The following table presents loans that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of March 31, 2023 and December 31, 2022: March 31, 2023 December 31, 2022 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 22,244 $ 8,767 $ 21,981 $ 8,378 Commercial real estate 12,303 1,209 12,303 1,209 Commercial construction, land and land development — — — — Residential real estate — — — — Single-family interim construction 189 60 189 43 Agricultural — — — — Consumer — — — — $ 34,736 $ 10,036 $ 34,473 $ 9,630
Summary of Nonperforming Loans by Loan Class	Nonperforming loans by loan class at March 31, 2023 and December 31, 2022 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total March 31, 2023 Nonaccrual loans (1) $ 22,274 $ 13,340 $ 13 $ 1,431 $ 189 $ — $ 7 $ 37,254 Loans past due 90 days and still accruing 26 — — 1 — 20 — 47 Total nonperforming loans (2) $ 22,300 $ 13,340 $ 13 $ 1,432 $ 189 $ 20 $ 7 $ 37,301 December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 Total nonperforming loans $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 ____________ (1) There are $2,696 and $125 in loans on nonaccrual without an allowance for credit loss as of March 31, 2023 and December 31, 2022, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three months ended March 31, 2023 and 2022.
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 March 31, 2023 and as of December 31, 2022: Loans Loans Total Past Current Total March 31, 2023 Commercial $ 5,196 $ 868 $ 6,064 $ 2,165,571 $ 2,171,635 Mortgage warehouse purchase loans — — — 400,547 400,547 Commercial real estate 5,055 12,312 17,367 7,933,113 7,950,480 Commercial construction, land and land development 3 — 3 1,178,522 1,178,525 Residential real estate 5,551 213 5,764 1,606,144 1,611,908 Single-family interim construction 232 189 421 487,000 487,421 Agricultural 2 20 22 121,936 121,958 Consumer 166 4 170 83,942 84,112 $ 16,205 $ 13,606 $ 29,811 $ 13,976,775 $ 14,006,586 December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363
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 March 31, 2023 and December 31, 2022: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 26,447 $ 287,208 $ 324,143 $ 116,966 $ 97,533 $ 187,813 $ 1,003,086 $ 117 $ 2,043,313 Pass/Watch 20 323 17,588 146 95 9,657 21,777 — 49,606 Special Mention — 275 4,390 97 1,387 4,954 7,696 — 18,799 Substandard 7,883 8,289 25,699 369 3,420 2,298 7,674 3,784 59,416 Doubtful — — 501 — — — — — 501 Loss — — — — — — — — — Total commercial $ 34,350 $ 296,095 $ 372,321 $ 117,578 $ 102,435 $ 204,722 $ 1,040,233 $ 3,901 $ 2,171,635 Current period gross write-offs $ — $ — $ 39 $ 5 $ 4 $ — $ — $ — $ 48 Mortgage warehouse purchase loans Pass $ 400,547 $ — $ — $ — $ — $ — $ — $ — $ 400,547 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 400,547 $ — $ — $ — $ — $ — $ — $ — $ 400,547 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial real estate Pass $ 215,732 $ 2,663,274 $ 2,025,047 $ 960,129 $ 587,065 $ 1,008,798 $ 66,531 $ 1,468 $ 7,528,044 Pass/Watch 7,478 92,496 21,993 35,838 20,436 71,606 139 — 249,986 Special Mention 3,742 15,740 38,119 — 10,804 25,514 360 — 94,279 Substandard 903 3,482 39,879 8,481 3,150 22,276 — — 78,171 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 227,855 $ 2,774,992 $ 2,125,038 $ 1,004,448 $ 621,455 $ 1,128,194 $ 67,030 $ 1,468 $ 7,950,480 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial construction, land and land development Pass $ 76,061 $ 546,078 $ 383,235 $ 111,534 $ 7,920 $ 29,430 $ 14,670 $ — $ 1,168,928 Pass/Watch 14 1,872 40 6,972 — 68 — — 8,966 Special Mention — 588 — — — — — — 588 Substandard — 27 — — 3 13 — — 43 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 76,075 $ 548,565 $ 383,275 $ 118,506 $ 7,923 $ 29,511 $ 14,670 $ — $ 1,178,525 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 33,820 $ 527,494 $ 368,984 $ 234,064 $ 151,146 $ 215,597 $ 62,483 $ 202 $ 1,593,790 Pass/Watch 757 370 892 2,822 1,531 1,987 387 — 8,746 Special Mention — 2,239 — — 698 1,399 127 — 4,463 Substandard — 1,152 — 528 219 2,924 86 — 4,909 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 34,577 $ 531,255 $ 369,876 $ 237,414 $ 153,594 $ 221,907 $ 63,083 $ 202 $ 1,611,908 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 76,183 $ 319,555 $ 78,071 $ — $ — $ — $ 13,423 $ — $ 487,232 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — 189 — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 76,183 $ 319,555 $ 78,260 $ — $ — $ — $ 13,423 $ — $ 487,421 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Agricultural Pass $ 7,312 $ 49,992 $ 24,157 $ 12,560 $ 3,643 $ 12,772 $ 9,040 $ — $ 119,476 Pass/Watch — 2,463 — — — — — — 2,463 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 7,312 $ 52,455 $ 24,157 $ 12,560 $ 3,643 $ 12,791 $ 9,040 $ — $ 121,958 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2023 2023 2022 2021 2020 2019 Prior Total Consumer Pass $ 2,660 $ 6,512 $ 3,983 $ 8,839 $ 1,446 $ 270 $ 60,353 $ 40 $ 84,103 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — 3 — — 6 — — 9 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 2,660 $ 6,512 $ 3,986 $ 8,839 $ 1,446 $ 276 $ 60,353 $ 40 $ 84,112 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Total loans Pass $ 838,762 $ 4,400,113 $ 3,207,620 $ 1,444,092 $ 848,753 $ 1,454,680 $ 1,229,586 $ 1,827 $ 13,425,433 Pass/Watch 8,269 97,524 40,513 45,778 22,062 83,318 22,303 — 319,767 Special Mention 3,742 18,842 42,509 97 12,889 31,867 8,183 — 118,129 Substandard 8,786 12,950 65,770 9,378 6,792 27,536 7,760 3,784 142,756 Doubtful — — 501 — — — — — 501 Loss — — — — — — — — — Total loans $ 859,559 $ 4,529,429 $ 3,356,913 $ 1,499,345 $ 890,496 $ 1,597,401 $ 1,267,832 $ 5,611 $ 14,006,586 Current period gross write-offs $ — $ — $ 1,235 $ 5 $ 4 $ — $ — $ — $ 1,244 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial real estate Pass $ 2,652,298 $ 1,980,631 $ 998,910 $ 617,664 $ 448,758 $ 640,275 $ 59,184 $ 9,222 $ 7,406,942 Pass/Watch 90,313 25,954 33,664 18,678 53,469 25,831 — — 247,909 Special Mention 10,180 41,193 — 10,870 8,722 10,735 — 26 81,726 Substandard 3,513 40,001 8,574 3,178 8,268 17,336 — — 80,870 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 2,756,304 $ 2,087,779 $ 1,041,148 $ 650,390 $ 519,217 $ 694,177 $ 59,184 $ 9,248 $ 7,817,447 Commercial construction, land and land development Pass $ 553,376 $ 465,272 $ 126,704 $ 10,477 $ 23,073 $ 12,188 $ 12,705 $ 4,018 $ 1,207,813 Pass/Watch 8,036 43 10,297 — — 72 — — 18,448 Special Mention 1,313 674 — — — — — — 1,987 Substandard 28 2,771 — 10 — 14 — — 2,823 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 562,753 $ 468,760 $ 137,001 $ 10,487 $ 23,073 $ 12,274 $ 12,705 $ 4,018 $ 1,231,071 Residential real estate Pass $ 525,631 $ 379,789 $ 220,077 $ 155,460 $ 79,437 $ 154,875 $ 59,332 $ 1,238 $ 1,575,839 Pass/Watch 373 918 642 1,743 76 3,312 302 — 7,366 Special Mention 2,267 — — 700 227 1,224 126 — 4,544 Substandard 708 455 538 219 — 2,997 193 — 5,110 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 528,979 $ 381,162 $ 221,257 $ 158,122 $ 79,740 $ 162,408 $ 59,953 $ 1,238 $ 1,592,859 Single-family interim construction Pass $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ — $ 16,447 $ — $ 492,177 Pass/Watch 16,471 — — — — — 2 — 16,473 Special Mention — — — — — — — — — Substandard — 189 — — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 367,502 $ 105,762 $ 18,885 $ — $ 241 $ — $ 16,449 $ — $ 508,839 Agricultural Pass $ 52,525 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,872 $ 10,588 $ — $ 120,155 Pass/Watch 2,700 — — — — — 1,547 — 4,247 Special Mention — — — — — — — — — Substandard — — — — — 20 — — 20 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 55,225 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,892 $ 12,135 $ — $ 124,422 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Consumer Pass $ 7,715 $ 4,909 $ 7,959 $ 1,576 $ 300 $ 81 $ 59,113 $ — $ 81,653 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 4 — — — 10 — — 14 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 7,715 $ 4,913 $ 7,959 $ 1,576 $ 300 $ 91 $ 59,113 $ — $ 81,667 Total loans Pass $ 4,752,475 $ 3,308,718 $ 1,512,800 $ 901,769 $ 609,279 $ 969,726 $ 1,248,852 $ 15,651 $ 13,319,270 Pass/Watch 117,901 41,705 44,758 20,609 55,357 37,149 10,067 5,907 333,453 Special Mention 13,994 46,688 101 13,055 8,949 12,103 8,772 46 103,708 Substandard 4,643 79,370 9,510 12,598 8,323 27,414 11,033 41 152,932 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 4,889,013 $ 3,476,481 $ 1,567,169 $ 948,031 $ 681,908 $ 1,046,392 $ 1,278,724 $ 21,645 $ 13,909,363

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	3 Months Ended
	Mar. 31, 2023
Advance from Federal Home Loan Bank [Abstract]
Contractual Maturities of FHLB Advances	Contractual maturities of FHLB advances at March 31, 2023 were as follows: First year $ 1,725,000 Second year — Third year — Fourth year — Fifth year — Thereafter 75,000 $ 1,800,000

Off-Balance Sheet Arrangement_2

Off-Balance Sheet Arrangements, Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	At March 31, 2023 and December 31, 2022, the approximate amounts of these financial instruments were as follows: March 31, December 31, 2023 2022 Commitments to extend credit $ 3,138,593 $ 3,291,409 Standby letters of credit 24,148 24,135 $ 3,162,741 $ 3,315,544
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 March 31, 2023 2022 Balance at beginning of period $ 3,944 $ 4,722 Provision for off-balance sheet credit exposure 811 757 Balance at end of period $ 4,755 $ 5,479

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax (benefit) expense for the three months ended March 31, 2023 and 2022 was as follows: Three Months Ended March 31, 2023 2022 Income tax (benefit) expense for the period $ (11,284) $ 12,279 Effective tax rate 23.1 % 19.5 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2023
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 March 31, 2023 and December 31, 2022 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant March 31, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 232,049 $ — $ 232,049 $ — Government agency securities 388,477 — 388,477 — Obligations of state and municipal subdivisions 247,574 — 247,574 — Corporate bonds 36,761 — 36,761 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 769,854 — 769,854 — Other securities 700 — 700 — Loans held for sale, fair value option elected (1) 12,989 — 12,989 — Derivative financial instruments: Interest rate lock commitments 471 — 471 — Forward mortgage-backed securities trades 5 — 5 — Loan customer counterparty 81 — 81 — Financial institution counterparty 10,938 — 10,938 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 9,444 — 9,444 — Interest rate lock commitments 1 — 1 — Forward mortgage-backed securities trades 122 — 122 — Loan customer counterparty 10,821 — 10,821 — Financial institution counterparty 90 — 90 — December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — __________ (1) At March 31, 2023 and December 31, 2022, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $12,604 and $10,330, 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 March 31, 2023.
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 March 31, 2023 and December 31, 2022, 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 March 31, 2023 Assets: Individually evaluated loans $ 86 $ — $ — $ 86 $ 18 Other real estate owned 22,700 — — 22,700 1,200 December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548
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 March 31, 2023 and December 31, 2022: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant March 31, 2023 Financial assets: Cash and cash equivalents $ 1,048,590 $ 1,048,590 $ 1,048,590 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 206,602 167,751 — 167,751 — Loans held for sale, at cost 3,587 3,649 — 3,649 — Loans, net 13,859,736 13,632,771 — — 13,632,771 FHLB of Dallas stock and other restricted stock 85,408 85,408 — 85,408 — Accrued interest receivable 55,882 55,882 — 55,882 — Financial liabilities: Deposits 14,055,687 14,007,690 — 14,007,690 — Accrued interest payable 10,829 10,829 — 10,829 — FHLB advances 1,800,000 1,788,372 — 1,788,372 — Other borrowings 337,607 323,500 — 323,500 — Junior subordinated debentures 54,469 59,761 — 59,761 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — —

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2023
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 March 31, 2023 and December 31, 2022: Outstanding Notional Balance Asset Derivative Liability Derivative March 31, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 9,444 Derivatives not designated as hedging instruments: Interest rate lock commitments 19,836 471 1 Forward mortgage-backed securities trades 21,750 5 122 Commercial loan interest rate swaps: Loan customer counterparty 182,305 81 10,821 Financial institution counterparty 182,305 10,938 90 December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 —
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 March 31, 2023 December 31, 2022 Received Paid Received Paid Loan customer counterparty 4.21 % 7.14 % 4.12 % 6.72 %
Income on Derivatives	A summary of derivative activity and the related impact on the consolidated statements of income for the three months ended March 31, 2023 and 2022 is as follows: Income Statement Location Three Months Ended March 31, 2023 2022 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (899) $ 197 Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 182 (381) Forward mortgage-backed securities trades Mortgage banking revenue (204) 447

Stock Awards (Tables)

Stock Awards (Tables)	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Summary of nonvested restricted stock awards	The following table summarizes the activity in nonvested restricted stock awards for the three months ended March 31, 2023 and 2022: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2022 309,015 $ 60.12 Granted during the period 119,767 60.21 Vested during the period (92,830) 64.55 Forfeited during the period (1,763) 63.23 Nonvested shares, March 31, 2023 334,189 $ 58.91 Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 77,284 73.94 Vested during the period (91,224) 57.55 Forfeited during the period (715) 67.56 Nonvested shares, March 31, 2022 348,896 $ 56.57
Schedule of future vesting of restricted stock award	At March 31, 2023, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 145,054 Second year 116,105 Third year 59,490 Fourth year 13,540 Total nonvested shares 334,189
Nonvested performance stock units	The following table summarizes the activity in nonvested performance stock units at target award level for the three months ended March 31, 2023 and 2022: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2022 140,240 $ 49.20 Granted during the period 37,938 60.21 Nonvested shares, March 31, 2023 178,178 $ 51.55 Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, March 31, 2022 135,240 $ 48.53

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2023
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements	The following table presents actual and required capital ratios under Basel III Capital Rules for the Company and Bank as of March 31, 2023 and December 31, 2022. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio March 31, 2023 Total capital to risk weighted assets: Consolidated $ 1,857,290 11.88 % $ 1,641,617 10.50 % $ 1,563,445 10.00 % Bank 2,032,009 13.00 1,641,162 10.50 1,563,011 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,571,885 10.05 1,328,928 8.50 938,067 6.00 Bank 1,898,604 12.15 1,328,559 8.50 1,250,409 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,516,285 9.70 1,094,411 7.00 N/A N/A Bank 1,898,604 12.15 1,094,108 7.00 1,015,957 6.50 Tier 1 capital to average assets: Consolidated 1,571,885 9.01 697,990 4.00 N/A N/A Bank 1,898,604 10.88 697,805 4.00 872,256 5.00 December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023 segment business_trust
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
	Mar. 31, 2023	Mar. 31, 2022
Basic (loss) earnings per share:
Net (loss) income	$ (37,510)	$ 50,740
Less: Undistributed (loss) earnings allocated to participating securities	(206)	266
Less: Dividends paid on participating securities	61	125
Net (loss) income available to common shareholders	$ (37,365)	$ 50,349
Weighted average basic shares outstanding (shares)	41,063,527	42,438,857
Basic (loss) earnings per share (usd per share)	$ (0.91)	$ 1.19
Diluted (loss) earnings per share:
Total weighted average diluted shares outstanding (shares)	41,156,949	42,512,249
Diluted (loss) earnings per share (usd per share)	$ (0.91)	$ 1.18
Anti-dilutive participating securities (shares)	58,891	145,219
Performance stock units
Diluted (loss) earnings per share:
Add dilutive performance stock (shares)	93,422	73,392

Cash Flows - Other Supplemental

Cash Flows - Other Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash transactions:
Interest expense paid	$ 72,029	$ 12,457
Income taxes paid	20	30
Noncash transactions:
Deferred dividend equivalents	53	44
Transfer of securities available for sale to held to maturity	0	117,583
Securities purchased, not yet settled	0	7,026
Right-of-use assets obtained in exchange for lease liabilities	3,556	3,882
Loans purchased, not yet settled	$ 4,987	$ 36,383

Securities - Amortized Cost of

Securities - Amortized Cost of Securities and Approximate Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	$ 1,913,286	$ 1,950,426
Gross Unrealized Gain, AFS	324	115
Gross Unrealized Loss, AFS	(238,195)	(258,757)
Fair Value, AFS	1,675,415	1,691,784
Amortized Cost, HTM	206,602	207,059
Fair Value, HTM	167,751
Accrued Interest, AFS	6,759	7,702
Accrued Interest, HTM	914	2,697
U.S. treasuries
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	249,309	259,675
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(17,260)	(20,265)
Fair Value, AFS	232,049	239,410
Government agency securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	468,934	468,994
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(80,457)	(84,479)
Fair Value, AFS	388,477	384,515
Obligations of state and municipal subdivisions
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	257,409	264,419
Gross Unrealized Gain, AFS	317	106
Gross Unrealized Loss, AFS	(10,152)	(13,294)
Fair Value, AFS	247,574	251,231
Amortized Cost, HTM	206,602	207,059
Gross Unrealized Gain, HTM	143	0
Gross Unrealized Loss, HTM	(38,994)	(44,820)
Fair Value, HTM	167,751	162,239
Corporate bonds
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	43,000	43,000
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(6,239)	(5,795)
Fair Value, AFS	36,761	37,205
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	893,934	913,388
Gross Unrealized Gain, AFS	7	9
Gross Unrealized Loss, AFS	(124,087)	(134,924)
Fair Value, AFS	769,854	778,473
Other securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	700	950
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	0	0
Fair Value, AFS	$ 700	$ 950

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Securities transferred from AFS to HTM		$ 117,583,000
Transfers unrealized pre-tax gains		26,000
Carrying value of securities pledged	$ 876,379,000		$ 1,168,006,000
Proceeds from sales	0	$ 0
Allowance for credit loss, AFS securities	0
Allowance for credit loss, HTM securities	$ 0		$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized Cost, AFS
Due in one year or less	$ 53,976
Due from one year to five years	313,724
Due from five to ten years	467,003
Thereafter	184,649
Total	1,019,352
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	893,934
Amortized Cost, AFS	1,913,286	$ 1,950,426
Fair Value, AFS
Due in one year or less	53,208
Due from one year to five years	296,280
Due from five to ten years	399,742
Thereafter	156,331
Total	905,561
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	769,854
Fair Value	1,675,415	1,691,784
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	206,602
Total	206,602
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Amortized Cost, HTM	206,602	$ 207,059
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	167,751
Total	167,751
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Fair Value	$ 167,751

Securities Available for Sale -

Securities Available for Sale - Proceeds, Gross Gains and Gross Losses from Sale (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 0	$ 0

Securities - Summary of Unreali

Securities - Summary of Unrealized Losses and Fair Value of Securities in Continuous Unrealized Loss Positions (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	154	599
Less than 12 months: estimated fair value AFS	$ 162,242	$ 670,035
Less than 12 months: unrealized losses AFS	$ (6,390)	$ (50,317)
Greater than 12 months: number of securities AFS | security	625	226
Greater than 12 months: estimated fair value AFS	$ 1,459,682	$ 992,487
Greater than 12 months: unrealized losses AFS	(231,805)	(208,440)
Total: estimated fair value AFS	1,621,924	1,662,522
Total: unrealized losses AFS	$ (238,195)	$ (258,757)
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	2	13
Less than 12 months: estimated fair value AFS	$ 17,031	$ 106,849
Less than 12 months: unrealized losses AFS	$ (502)	$ (3,923)
Greater than 12 months: number of securities AFS | security	33	23
Greater than 12 months: estimated fair value AFS	$ 215,018	$ 132,561
Greater than 12 months: unrealized losses AFS	(16,758)	(16,342)
Total: estimated fair value AFS	232,049	239,410
Total: unrealized losses AFS	$ (17,260)	$ (20,265)
Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	1	13
Less than 12 months: estimated fair value AFS	$ 4,877	$ 63,451
Less than 12 months: unrealized losses AFS	$ (135)	$ (7,533)
Greater than 12 months: number of securities AFS | security	74	62
Greater than 12 months: estimated fair value AFS	$ 383,600	$ 321,064
Greater than 12 months: unrealized losses AFS	(80,322)	(76,946)
Total: estimated fair value AFS	388,477	384,515
Total: unrealized losses AFS	$ (80,457)	$ (84,479)
Obligations of state and municipal subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	119	339
Less than 12 months: estimated fair value AFS	$ 81,043	$ 209,395
Less than 12 months: unrealized losses AFS	$ (487)	$ (9,068)
Greater than 12 months: number of securities AFS | security	186	9
Greater than 12 months: estimated fair value AFS	$ 117,227	$ 17,034
Greater than 12 months: unrealized losses AFS	(9,665)	(4,226)
Total: estimated fair value AFS	198,270	226,429
Total: unrealized losses AFS	$ (10,152)	$ (13,294)
Less than 12 months: number of securities HTM | security	3	22
Less than 12 months: estimated fair value HTM	$ 12,816	$ 98,475
Less than 12 months: unrealized losses HTM	$ (385)	$ (21,210)
Greater than 12 months: number of securities HTM | security	39	21
Greater than 12 months: estimated fair value HTM	$ 147,723	$ 63,764
Greater than 12 months: unrealized losses HTM	(38,609)	(23,610)
Total: estimated fair value HTM	160,539	162,239
Total: unrealized losses HTM	$ (38,994)	$ (44,820)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	3	8
Less than 12 months: estimated fair value AFS	$ 11,885	$ 23,584
Less than 12 months: unrealized losses AFS	$ (3,115)	$ (4,416)
Greater than 12 months: number of securities AFS | security	8	3
Greater than 12 months: estimated fair value AFS	$ 21,876	$ 10,621
Greater than 12 months: unrealized losses AFS	(3,124)	(1,379)
Total: estimated fair value AFS	33,761	34,205
Total: unrealized losses AFS	$ (6,239)	$ (5,795)
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	29	226
Less than 12 months: estimated fair value AFS	$ 47,406	$ 266,756
Less than 12 months: unrealized losses AFS	$ (2,151)	$ (25,377)
Greater than 12 months: number of securities AFS | security	324	129
Greater than 12 months: estimated fair value AFS	$ 721,961	$ 511,207
Greater than 12 months: unrealized losses AFS	(121,936)	(109,547)
Total: estimated fair value AFS	769,367	777,963
Total: unrealized losses AFS	$ (124,087)	$ (134,924)

Loans, Net and Allowance for _3

Loans, Net and Allowance for Credit Losses on Loans - Composition of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,006,586	$ 13,909,363
Allowance for credit losses	(146,850)	(148,787)	$ (146,313)	$ (148,706)
Total loans, net	13,859,736	13,760,576
Accrued Interest Receivable	47,170	48,815
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,171,635	2,240,959
Allowance for credit losses	(53,122)	(54,037)	(50,485)	(49,747)
Mortgage warehouse purchase loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	400,547	312,099
Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,950,480	7,817,447
Allowance for credit losses	(59,109)	(61,078)	(59,699)	(65,110)
Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,178,525	1,231,071
Allowance for credit losses	(17,331)	(17,696)	(25,104)	(23,861)
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,611,908	1,592,859
Allowance for credit losses	(4,780)	(3,450)	(2,770)	(2,192)
Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	487,421	508,839
Allowance for credit losses	(11,812)	(11,817)	(7,749)	(7,222)
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	121,958	124,422
Allowance for credit losses	(231)	(207)	(132)	(106)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	84,112	81,667
Allowance for credit losses	$ (465)	$ (502)	$ (374)	$ (468)

Loans, Net and Allowance for _4

Loans, Net and Allowance for Credit Losses on Loans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	$ 7,432,017	$ 7,246,087
Commercial Loans	$ 13,859,736	13,760,576
Commercial | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP interest rate	1%
PPP loans outstanding	$ 3,542	4,958
PPP deferred loan fees	$ 86	101
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	$ 549,895	$ 574,698
Mortgage warehouse purchase loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Duration of the loans to larger mortgage originators	60 days
Mortgage warehouse purchase loans | 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%
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
	Mar. 31, 2023	Mar. 31, 2022
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 148,787	$ 148,706
Provision for credit losses	(721)	(2,200)
Charge-offs	(1,244)	(457)
Recoveries	28	264
Balance at end of period	146,850	146,313
Commercial
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	54,037	49,747
Provision for credit losses	(895)	915
Charge-offs	(48)	(441)
Recoveries	28	264
Balance at end of period	53,122	50,485
Real estate | Commercial Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	61,078	65,110
Provision for credit losses	(1,969)	(5,411)
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	59,109	59,699
Real estate | Commercial Construction, Land and Land Development
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	17,696	23,861
Provision for credit losses	831	1,243
Charge-offs	(1,196)	0
Recoveries	0	0
Balance at end of period	17,331	25,104
Real estate | Residential Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	3,450	2,192
Provision for credit losses	1,330	584
Charge-offs	0	(6)
Recoveries	0	0
Balance at end of period	4,780	2,770
Real estate | Single-family interim construction
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	11,817	7,222
Provision for credit losses	(5)	527
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	11,812	7,749
Agricultural
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	207	106
Provision for credit losses	24	26
Charge-offs	0	0
Recoveries	0	0
Balance at end of period	231	132
Consumer
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	502	468
Provision for credit losses	(37)	(84)
Charge-offs	0	(10)
Recoveries	0	0
Balance at end of period	$ 465	$ 374

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	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	$ 34,736	$ 34,473
Specific allocations of individually evaluated loans	10,036	9,630
Commercial
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	22,244	21,981
Specific allocations of individually evaluated loans	8,767	8,378
Real estate | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	12,303	12,303
Specific allocations of individually evaluated loans	1,209	1,209
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Impaired [Line Items]
Individually evaluated loans	0	0
Specific allocations of individually evaluated loans	0	0
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	189	189
Specific allocations of individually evaluated loans	60	43
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
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, no allowance	$ 2,696,000		$ 125,000
Financing Receivable, Nonaccrual, Interest Income	0	$ 0
Nonperforming Financial Instruments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	37,254,000		37,752,000
Loans past due 90 days and still accruing	47,000		843,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			1,494,000
Total nonperforming loans	37,301,000		40,089,000
Nonperforming Financial Instruments | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	22,274,000		22,565,000
Loans past due 90 days and still accruing	26,000		5,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			0
Total nonperforming loans	22,300,000		22,570,000
Nonperforming Financial Instruments | Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	13,340,000		13,393,000
Loans past due 90 days and still accruing	0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			1,435,000
Total nonperforming loans	13,340,000		14,828,000
Nonperforming Financial Instruments | Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	13,000		15,000
Loans past due 90 days and still accruing	0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			0
Total nonperforming loans	13,000		15,000
Nonperforming Financial Instruments | Real estate | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,431,000		1,582,000
Loans past due 90 days and still accruing	1,000		838,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			59,000
Total nonperforming loans	1,432,000		2,479,000
Nonperforming Financial Instruments | Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	189,000		189,000
Loans past due 90 days and still accruing	0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			0
Total nonperforming loans	189,000		189,000
Nonperforming Financial Instruments | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0		0
Loans past due 90 days and still accruing	20,000		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			0
Total nonperforming loans	20,000		0
Nonperforming Financial Instruments | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	7,000		8,000
Loans past due 90 days and still accruing	0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)			0
Total nonperforming loans	$ 7,000		$ 8,000

Loans, Net and Allowance for _8

Loans, Net and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans	$ 14,006,586	$ 13,909,363
Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,171,635	2,240,959
Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	400,547	312,099
Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	7,950,480	7,817,447
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,178,525	1,231,071
Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,611,908	1,592,859
Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	487,421	508,839
Agricultural
Financing Receivable, Past Due [Line Items]
Loans	121,958	124,422
Consumer
Financing Receivable, Past Due [Line Items]
Loans	84,112	81,667
Loans 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	16,205	21,834
Loans 30-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	5,196	1,005
Loans 30-89 Days Past Due | Mortgage warehouse purchase loans
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	5,055	13,093
Loans 30-89 Days Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	3	2,820
Loans 30-89 Days Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	5,551	4,702
Loans 30-89 Days Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	232	0
Loans 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	2	0
Loans 30-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	166	214
Loans 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	13,606	7,621
Loans 90 Days or More Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	868	5,629
Loans 90 Days or More Past Due | Mortgage warehouse purchase loans
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	12,312	449
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	213	1,346
Loans 90 Days or More Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	189	189
Loans 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	20	0
Loans 90 Days or More Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	4	8
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Loans	29,811	29,455
Total Past Due Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	6,064	6,634
Total Past Due Loans | Mortgage warehouse purchase loans
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	17,367	13,542
Total Past Due Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	3	2,820
Total Past Due Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	5,764	6,048
Total Past Due Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	421	189
Total Past Due Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	22	0
Total Past Due Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	170	222
Current Loans
Financing Receivable, Past Due [Line Items]
Loans	13,976,775	13,879,908
Current Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,165,571	2,234,325
Current Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	400,547	312,099
Current Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	7,933,113	7,803,905
Current Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,178,522	1,228,251
Current Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,606,144	1,586,811
Current Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	487,000	508,650
Current Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	121,936	124,422
Current Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 83,942	$ 81,445

Loans, Net and Allowance for _9

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	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	$ 859,559		$ 4,889,013
Term Loans by Year of Origination, Year 2	4,529,429		3,476,481
Term Loans by Year of Origination, Year 3	3,356,913		1,567,169
Term Loans by Year of Origination, Year 4	1,499,345		948,031
Term Loans by Year of Origination, Year 5	890,496		681,908
Term Loans by Year of Origination, Prior	1,597,401		1,046,392
Revolving Loans	1,267,832		1,278,724
Revolving Loans Converted to Term Loans	5,611		21,645
Total Loans	14,006,586		13,909,363
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	1,235
Term Loans by Year of Origination, Year 4 write-offs	5
Term Loans by Year of Origination, Year 5 write-offs	4
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	1,244	$ 457
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	838,762		4,752,475
Term Loans by Year of Origination, Year 2	4,400,113		3,308,718
Term Loans by Year of Origination, Year 3	3,207,620		1,512,800
Term Loans by Year of Origination, Year 4	1,444,092		901,769
Term Loans by Year of Origination, Year 5	848,753		609,279
Term Loans by Year of Origination, Prior	1,454,680		969,726
Revolving Loans	1,229,586		1,248,852
Revolving Loans Converted to Term Loans	1,827		15,651
Total Loans	13,425,433		13,319,270
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	8,269		117,901
Term Loans by Year of Origination, Year 2	97,524		41,705
Term Loans by Year of Origination, Year 3	40,513		44,758
Term Loans by Year of Origination, Year 4	45,778		20,609
Term Loans by Year of Origination, Year 5	22,062		55,357
Term Loans by Year of Origination, Prior	83,318		37,149
Revolving Loans	22,303		10,067
Revolving Loans Converted to Term Loans	0		5,907
Total Loans	319,767		333,453
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	3,742		13,994
Term Loans by Year of Origination, Year 2	18,842		46,688
Term Loans by Year of Origination, Year 3	42,509		101
Term Loans by Year of Origination, Year 4	97		13,055
Term Loans by Year of Origination, Year 5	12,889		8,949
Term Loans by Year of Origination, Prior	31,867		12,103
Revolving Loans	8,183		8,772
Revolving Loans Converted to Term Loans	0		46
Total Loans	118,129		103,708
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	8,786		4,643
Term Loans by Year of Origination, Year 2	12,950		79,370
Term Loans by Year of Origination, Year 3	65,770		9,510
Term Loans by Year of Origination, Year 4	9,378		12,598
Term Loans by Year of Origination, Year 5	6,792		8,323
Term Loans by Year of Origination, Prior	27,536		27,414
Revolving Loans	7,760		11,033
Revolving Loans Converted to Term Loans	3,784		41
Total Loans	142,756		152,932
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	501		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	501		0
Loss
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
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	34,350		298,436
Term Loans by Year of Origination, Year 2	296,095		403,362
Term Loans by Year of Origination, Year 3	372,321		127,044
Term Loans by Year of Origination, Year 4	117,578		123,751
Term Loans by Year of Origination, Year 5	102,435		53,490
Term Loans by Year of Origination, Prior	204,722		168,550
Revolving Loans	1,040,233		1,059,185
Revolving Loans Converted to Term Loans	3,901		7,141
Total Loans	2,171,635		2,240,959
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	39
Term Loans by Year of Origination, Year 4 write-offs	5
Term Loans by Year of Origination, Year 5 write-offs	4
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	48	441
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	26,447		297,800
Term Loans by Year of Origination, Year 2	287,208		347,801
Term Loans by Year of Origination, Year 3	324,143		126,390
Term Loans by Year of Origination, Year 4	116,966		112,887
Term Loans by Year of Origination, Year 5	97,533		51,623
Term Loans by Year of Origination, Prior	187,813		153,435
Revolving Loans	1,003,086		1,031,483
Revolving Loans Converted to Term Loans	117		1,173
Total Loans	2,043,313		2,122,592
Commercial | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	20		8
Term Loans by Year of Origination, Year 2	323		14,790
Term Loans by Year of Origination, Year 3	17,588		155
Term Loans by Year of Origination, Year 4	146		188
Term Loans by Year of Origination, Year 5	95		1,812
Term Loans by Year of Origination, Prior	9,657		7,934
Revolving Loans	21,777		8,216
Revolving Loans Converted to Term Loans	0		5,907
Total Loans	49,606		39,010
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		234
Term Loans by Year of Origination, Year 2	275		4,821
Term Loans by Year of Origination, Year 3	4,390		101
Term Loans by Year of Origination, Year 4	97		1,485
Term Loans by Year of Origination, Year 5	1,387		0
Term Loans by Year of Origination, Prior	4,954		144
Revolving Loans	7,696		8,646
Revolving Loans Converted to Term Loans	0		20
Total Loans	18,799		15,451
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	7,883		394
Term Loans by Year of Origination, Year 2	8,289		35,950
Term Loans by Year of Origination, Year 3	25,699		398
Term Loans by Year of Origination, Year 4	369		9,191
Term Loans by Year of Origination, Year 5	3,420		55
Term Loans by Year of Origination, Prior	2,298		7,037
Revolving Loans	7,674		10,840
Revolving Loans Converted to Term Loans	3,784		41
Total Loans	59,416		63,906
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	501		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	501		0
Commercial | Loss
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 purchase loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	400,547		312,099
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	400,547		312,099
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0
Mortgage warehouse purchase loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	400,547		312,099
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	400,547		312,099
Mortgage warehouse purchase loans | 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 purchase loans | 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 purchase loans | 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 purchase loans | 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 purchase loans | Loss
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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	227,855		2,756,304
Term Loans by Year of Origination, Year 2	2,774,992		2,087,779
Term Loans by Year of Origination, Year 3	2,125,038		1,041,148
Term Loans by Year of Origination, Year 4	1,004,448		650,390
Term Loans by Year of Origination, Year 5	621,455		519,217
Term Loans by Year of Origination, Prior	1,128,194		694,177
Revolving Loans	67,030		59,184
Revolving Loans Converted to Term Loans	1,468		9,248
Total Loans	7,950,480		7,817,447
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0	0
Real estate | Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	215,732		2,652,298
Term Loans by Year of Origination, Year 2	2,663,274		1,980,631
Term Loans by Year of Origination, Year 3	2,025,047		998,910
Term Loans by Year of Origination, Year 4	960,129		617,664
Term Loans by Year of Origination, Year 5	587,065		448,758
Term Loans by Year of Origination, Prior	1,008,798		640,275
Revolving Loans	66,531		59,184
Revolving Loans Converted to Term Loans	1,468		9,222
Total Loans	7,528,044		7,406,942
Real estate | Commercial Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	7,478		90,313
Term Loans by Year of Origination, Year 2	92,496		25,954
Term Loans by Year of Origination, Year 3	21,993		33,664
Term Loans by Year of Origination, Year 4	35,838		18,678
Term Loans by Year of Origination, Year 5	20,436		53,469
Term Loans by Year of Origination, Prior	71,606		25,831
Revolving Loans	139		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	249,986		247,909
Real estate | Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	3,742		10,180
Term Loans by Year of Origination, Year 2	15,740		41,193
Term Loans by Year of Origination, Year 3	38,119		0
Term Loans by Year of Origination, Year 4	0		10,870
Term Loans by Year of Origination, Year 5	10,804		8,722
Term Loans by Year of Origination, Prior	25,514		10,735
Revolving Loans	360		0
Revolving Loans Converted to Term Loans	0		26
Total Loans	94,279		81,726
Real estate | Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	903		3,513
Term Loans by Year of Origination, Year 2	3,482		40,001
Term Loans by Year of Origination, Year 3	39,879		8,574
Term Loans by Year of Origination, Year 4	8,481		3,178
Term Loans by Year of Origination, Year 5	3,150		8,268
Term Loans by Year of Origination, Prior	22,276		17,336
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	78,171		80,870
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		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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	76,075		562,753
Term Loans by Year of Origination, Year 2	548,565		468,760
Term Loans by Year of Origination, Year 3	383,275		137,001
Term Loans by Year of Origination, Year 4	118,506		10,487
Term Loans by Year of Origination, Year 5	7,923		23,073
Term Loans by Year of Origination, Prior	29,511		12,274
Revolving Loans	14,670		12,705
Revolving Loans Converted to Term Loans	0		4,018
Total Loans	1,178,525		1,231,071
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	1,196
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	1,196	0
Real estate | Commercial Construction, Land and Land Development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	76,061		553,376
Term Loans by Year of Origination, Year 2	546,078		465,272
Term Loans by Year of Origination, Year 3	383,235		126,704
Term Loans by Year of Origination, Year 4	111,534		10,477
Term Loans by Year of Origination, Year 5	7,920		23,073
Term Loans by Year of Origination, Prior	29,430		12,188
Revolving Loans	14,670		12,705
Revolving Loans Converted to Term Loans	0		4,018
Total Loans	1,168,928		1,207,813
Real estate | Commercial Construction, Land and Land Development | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	14		8,036
Term Loans by Year of Origination, Year 2	1,872		43
Term Loans by Year of Origination, Year 3	40		10,297
Term Loans by Year of Origination, Year 4	6,972		0
Term Loans by Year of Origination, Year 5	0		0
Term Loans by Year of Origination, Prior	68		72
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	8,966		18,448
Real estate | Commercial Construction, Land and Land Development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		1,313
Term Loans by Year of Origination, Year 2	588		674
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	588		1,987
Real estate | Commercial Construction, Land and Land Development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		28
Term Loans by Year of Origination, Year 2	27		2,771
Term Loans by Year of Origination, Year 3	0		0
Term Loans by Year of Origination, Year 4	0		10
Term Loans by Year of Origination, Year 5	3		0
Term Loans by Year of Origination, Prior	13		14
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	43		2,823
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		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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	34,577		528,979
Term Loans by Year of Origination, Year 2	531,255		381,162
Term Loans by Year of Origination, Year 3	369,876		221,257
Term Loans by Year of Origination, Year 4	237,414		158,122
Term Loans by Year of Origination, Year 5	153,594		79,740
Term Loans by Year of Origination, Prior	221,907		162,408
Revolving Loans	63,083		59,953
Revolving Loans Converted to Term Loans	202		1,238
Total Loans	1,611,908		1,592,859
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0	6
Real estate | Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	33,820		525,631
Term Loans by Year of Origination, Year 2	527,494		379,789
Term Loans by Year of Origination, Year 3	368,984		220,077
Term Loans by Year of Origination, Year 4	234,064		155,460
Term Loans by Year of Origination, Year 5	151,146		79,437
Term Loans by Year of Origination, Prior	215,597		154,875
Revolving Loans	62,483		59,332
Revolving Loans Converted to Term Loans	202		1,238
Total Loans	1,593,790		1,575,839
Real estate | Residential Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	757		373
Term Loans by Year of Origination, Year 2	370		918
Term Loans by Year of Origination, Year 3	892		642
Term Loans by Year of Origination, Year 4	2,822		1,743
Term Loans by Year of Origination, Year 5	1,531		76
Term Loans by Year of Origination, Prior	1,987		3,312
Revolving Loans	387		302
Revolving Loans Converted to Term Loans	0		0
Total Loans	8,746		7,366
Real estate | Residential Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		2,267
Term Loans by Year of Origination, Year 2	2,239		0
Term Loans by Year of Origination, Year 3	0		0
Term Loans by Year of Origination, Year 4	0		700
Term Loans by Year of Origination, Year 5	698		227
Term Loans by Year of Origination, Prior	1,399		1,224
Revolving Loans	127		126
Revolving Loans Converted to Term Loans	0		0
Total Loans	4,463		4,544
Real estate | Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		708
Term Loans by Year of Origination, Year 2	1,152		455
Term Loans by Year of Origination, Year 3	0		538
Term Loans by Year of Origination, Year 4	528		219
Term Loans by Year of Origination, Year 5	219		0
Term Loans by Year of Origination, Prior	2,924		2,997
Revolving Loans	86		193
Revolving Loans Converted to Term Loans	0		0
Total Loans	4,909		5,110
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		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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	76,183		367,502
Term Loans by Year of Origination, Year 2	319,555		105,762
Term Loans by Year of Origination, Year 3	78,260		18,885
Term Loans by Year of Origination, Year 4	0		0
Term Loans by Year of Origination, Year 5	0		241
Term Loans by Year of Origination, Prior	0		0
Revolving Loans	13,423		16,449
Revolving Loans Converted to Term Loans	0		0
Total Loans	487,421		508,839
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0	0
Real estate | Single-family interim construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	76,183		351,031
Term Loans by Year of Origination, Year 2	319,555		105,573
Term Loans by Year of Origination, Year 3	78,071		18,885
Term Loans by Year of Origination, Year 4	0		0
Term Loans by Year of Origination, Year 5	0		241
Term Loans by Year of Origination, Prior	0		0
Revolving Loans	13,423		16,447
Revolving Loans Converted to Term Loans	0		0
Total Loans	487,232		492,177
Real estate | Single-family interim construction | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		16,471
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		2
Revolving Loans Converted to Term Loans	0		0
Total Loans	0		16,473
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		189
Term Loans by Year of Origination, Year 3	189		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	189		189
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		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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	7,312		55,225
Term Loans by Year of Origination, Year 2	52,455		24,743
Term Loans by Year of Origination, Year 3	24,157		13,875
Term Loans by Year of Origination, Year 4	12,560		3,705
Term Loans by Year of Origination, Year 5	3,643		5,847
Term Loans by Year of Origination, Prior	12,791		8,892
Revolving Loans	9,040		12,135
Revolving Loans Converted to Term Loans	0		0
Total Loans	121,958		124,422
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0	0
Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	7,312		52,525
Term Loans by Year of Origination, Year 2	49,992		24,743
Term Loans by Year of Origination, Year 3	24,157		13,875
Term Loans by Year of Origination, Year 4	12,560		3,705
Term Loans by Year of Origination, Year 5	3,643		5,847
Term Loans by Year of Origination, Prior	12,772		8,872
Revolving Loans	9,040		10,588
Revolving Loans Converted to Term Loans	0		0
Total Loans	119,476		120,155
Agricultural | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	0		2,700
Term Loans by Year of Origination, Year 2	2,463		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		1,547
Revolving Loans Converted to Term Loans	0		0
Total Loans	2,463		4,247
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	19		20
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	19		20
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		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
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	2,660		7,715
Term Loans by Year of Origination, Year 2	6,512		4,913
Term Loans by Year of Origination, Year 3	3,986		7,959
Term Loans by Year of Origination, Year 4	8,839		1,576
Term Loans by Year of Origination, Year 5	1,446		300
Term Loans by Year of Origination, Prior	276		91
Revolving Loans	60,353		59,113
Revolving Loans Converted to Term Loans	40		0
Total Loans	84,112		81,667
Term Loans by Year of Origination, Current write-offs	0
Term Loans by Year of Origination, Year 2 write-offs	0
Term Loans by Year of Origination, Year 3 write-offs	0
Term Loans by Year of Origination, Year 4 write-offs	0
Term Loans by Year of Origination, Year 5 write-offs	0
Term Loans by Year of Origination, Prior write-offs	0
Revolving Loans write-offs	0
Revolving Loans Converted to Term Loans write-offs	0
Total write-offs	0	$ 10
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, Current	2,660		7,715
Term Loans by Year of Origination, Year 2	6,512		4,909
Term Loans by Year of Origination, Year 3	3,983		7,959
Term Loans by Year of Origination, Year 4	8,839		1,576
Term Loans by Year of Origination, Year 5	1,446		300
Term Loans by Year of Origination, Prior	270		81
Revolving Loans	60,353		59,113
Revolving Loans Converted to Term Loans	40		0
Total Loans	84,103		81,653
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		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 | 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		0
Term Loans by Year of Origination, Year 2	0		4
Term Loans by Year of Origination, Year 3	3		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	6		10
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	9		14
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		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

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Weighted average interest rate on advances (percent)	4.98%	2.42%
Outstanding balances of advances	$ 1,800,000	$ 300,000
Federal Home Loan Bank Stock	82,156
Loans pledged	6,103,264
Remaining credit facility under FHLB advances	2,938,693
Federal Home Loan Bank Advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Undisbursed advance commitments (letter of credit)	$ 1,354,265

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances - Schedule of Outstanding Balances on Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
First year	$ 1,725,000
Second year	0
Third year	0
Fourth year	0
Fifth year	0
Thereafter	75,000
FHLB advances	$ 1,800,000	$ 300,000

Other Borrowings (Details)

Other Borrowings (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Other borrowings	$ 337,607,000	$ 267,066,000
5.00% Subordinated Debenture Notes Due December 31, 2027
Debt Instrument [Line Items]
Repayments of Subordinated Debt	$ 30,000,000
Stated interest rate (percent)	5%
Revolving Line of Credit | Line of Credit | Line of Credit
Debt Instrument [Line Items]
Borrowings against line of credit	$ (100,000,000)	$ 0

Off-Balance Sheet Arrangement_3

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 3,162,741	$ 3,315,544
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	3,138,593	3,291,409
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 24,148	$ 24,135

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
	Mar. 31, 2023	Mar. 31, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 3,944	$ 4,722
Provision for off-balance sheet credit exposure	811	757
Balance at end of period	$ 4,755	$ 5,479

Off-Balance Sheet Arrangement_5

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 07, 2023	Mar. 31, 2023	Mar. 31, 2022
Loss Contingencies [Line Items]
Litigation settlement		$ 102,500	$ 0
Settlement agreement
Loss Contingencies [Line Items]
Litigation settlement	$ 100,000,000
Legal Fees	$ 2,500,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Income tax (benefit) expense for the period	$ (11,284)	$ 12,279
Effective tax rate (percent)	23.10%	19.50%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 1,675,415,000	$ 1,691,784,000
Loans held for sale, fair value option	12,989,000	10,612,000
Aggregate principal balance of loans held for sale	12,604,000	10,330,000
Loans held for sale, 90 days or greater past due	0
Loans held for sale, non-accrual	0
Designated as Hedging Instrument | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	9,444,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	9,444,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | 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 Swap | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	9,444,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | 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	12,989,000	10,612,000
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	12,989,000	10,612,000
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	471,000	294,000
Derivative financial instruments - Liabilities	1,000	6,000
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	471,000	294,000
Derivative financial instruments - Liabilities	1,000	6,000
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	471,000	294,000
Derivative financial instruments - Liabilities	1,000	6,000
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	5,000	98,000
Derivative financial instruments - Liabilities	122,000	11,000
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	5,000	98,000
Derivative financial instruments - Liabilities	122,000	11,000
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	5,000	98,000
Derivative financial instruments - Liabilities	122,000	11,000
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 Swap | Loan customer counterparty | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	81,000
Derivative financial instruments - Liabilities	10,821,000	13,788,000
Not designated as hedging | Interest Rate Swap | 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
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest Rate Swap | 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
Derivative financial instruments - Liabilities	10,821,000	13,788,000
Not designated as hedging | Interest Rate Swap | 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
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest Rate Swap | Financial institution counterparty | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	10,938,000	13,968,000
Derivative financial instruments - Liabilities	90,000
Not designated as hedging | Interest Rate Swap | 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
Not designated as hedging | Interest Rate Swap | 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	10,938,000	13,968,000
Derivative financial instruments - Liabilities	90,000
Not designated as hedging | Interest Rate Swap | 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
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	232,049,000	239,410,000
U.S. treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	232,049,000	239,410,000
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	232,049,000	239,410,000
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	388,477,000	384,515,000
Government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	388,477,000	384,515,000
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	388,477,000	384,515,000
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	247,574,000	251,231,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	247,574,000	251,231,000
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	247,574,000	251,231,000
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	36,761,000	37,205,000
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	36,761,000	37,205,000
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	36,761,000	37,205,000
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	769,854,000	778,473,000
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	769,854,000	778,473,000
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	769,854,000	778,473,000
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	700,000	950,000
Other securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	700,000	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	700,000	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	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 34,736	$ 34,473
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	86	8,527
Other real estate owned	22,700	23,900
Fair Value, Measurements, Nonrecurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	18	3,505
Fair Value, Measurements, Nonrecurring | Other real estate owned
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	1,200	3,548
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	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	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	86	8,527
Other real estate owned	$ 22,700	$ 23,900

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	Mar. 31, 2023 Rate
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling And Closing Costs For Loans As A Percentage Of Appraised Value	5%
Selling And Closing Costs For Other Real Estate Owned As A Percentage Of Appraised Value	5%
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling And Closing Costs For Loans As A Percentage Of Appraised Value	8%
Selling And Closing Costs For Other Real Estate Owned As A Percentage Of Appraised Value	8%

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financial assets:
Investment securities held to maturity	$ 167,751
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,162,741	$ 3,315,544
Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,138,593	3,291,409
Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	24,148	24,135
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	1,048,590	654,322
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0	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	486	486
Investment securities held to maturity	167,751	162,239
Loans held for sale, at cost	3,649	710
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	85,408	23,436
Accrued interest receivable	55,882	59,214
Financial liabilities:
Deposits	14,007,690	15,063,025
Accrued interest payable	10,829	9,604
FHLB advances	1,788,372	246,519
Other borrowings	323,500	258,800
Junior subordinated debentures	59,761	53,969
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	0
Loans held for sale, at cost	0	0
Loans, net	13,632,771	13,450,582
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	1,048,590	654,322
Certificates of deposit held in other banks	496	496
Investment securities held to maturity	206,602	207,059
Loans held for sale, at cost	3,587	698
Loans, net	13,859,736	13,760,576
FHLB of Dallas stock and other restricted stock	85,408	23,436
Accrued interest receivable	55,882	59,214
Financial liabilities:
Deposits	14,055,687	15,121,417
Accrued interest payable	10,829	9,604
FHLB advances	1,800,000	300,000
Other borrowings	337,607	267,066
Junior subordinated debentures	54,469	54,419
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	1,048,590	654,322
Certificates of deposit held in other banks	486	486
Investment securities held to maturity	167,751	162,239
Loans held for sale, at cost	3,649	710
Loans, net	13,632,771	13,450,582
FHLB of Dallas stock and other restricted stock	85,408	23,436
Accrued interest receivable	55,882	59,214
Financial liabilities:
Deposits	14,007,690	15,063,025
Accrued interest payable	10,829	9,604
FHLB advances	1,788,372	246,519
Other borrowings	323,500	258,800
Junior subordinated debentures	59,761	53,969
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
	Mar. 31, 2023 USD ($) derivative	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Number of interest rate derivatives instruments entered into | derivative	2
Unrealized gains (losses) arising during the period, net of tax	$ 743,000	$ (3,922,000)
Reclassification of amount of losses (gains) recognized into income, net of tax	706,000	$ (160,000)
Cash collateral pledged for derivatives	10,909,000		$ 10,394,000
Securities collateral pledged for derivatives	486,000		509,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	2,730,000
Interest Rate Swap | Loan customer counterparty
Derivative [Line Items]
Credit exposure limited to the net favorable value of all swaps	$ 11,019,000		13,968,000
Risk Participation Agreements Participant Bank
Derivative [Line Items]
Number of risk participation agreements	0
Risk Participation Agreements Lead Bank
Derivative [Line Items]
Number of risk participation agreements	1
Credit risk participation	$ 9,014,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative notional amount	100,000,000		$ 100,000,000
Cash flow hedge gain (loss), net to be reclassified during next 12 months	$ 3,696,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Balances and Fair Values of Outstanding Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Outstanding Notional Balance	$ 100,000	$ 100,000
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	9,444	11,283
Not designated as hedging | Interest Rate Swap | Commercial Loan | Loan customer counterparty
Derivative [Line Items]
Outstanding Notional Balance	182,305	183,183
Asset Derivative Fair Value	81	0
Liability Derivative Fair Value	10,821	13,788
Not designated as hedging | Interest Rate Swap | Commercial Loan | Financial institution counterparty
Derivative [Line Items]
Outstanding Notional Balance	182,305	183,183
Asset Derivative Fair Value	10,938	13,968
Liability Derivative Fair Value	90	0
Not designated as hedging | Interest rate lock commitments
Derivative [Line Items]
Outstanding Notional Balance	19,836	15,476
Asset Derivative Fair Value	471	294
Liability Derivative Fair Value	1	6
Not designated as hedging | Forward mortgage-backed securities trades
Derivative [Line Items]
Outstanding Notional Balance	21,750	18,500
Asset Derivative Fair Value	5	98
Liability Derivative Fair Value	$ 122	$ 11

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 Swap	Mar. 31, 2023	Dec. 31, 2022
Interest Rate Received
Derivative [Line Items]
Weighted Average Interest Rate received	4.21%	4.12%
Interest Rate Paid
Derivative [Line Items]
Weighted Average Interest Rate Paid	7.14%	6.72%

Derivative Financial Instrume_6

Derivative Financial Instruments - Income (Loss) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ (899)	$ 197
Interest rate lock commitments | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	182	(381)
Forward mortgage-backed securities trades | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ (204)	$ 447

Stock Awards - Additional Infor

Stock Awards - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	May 30, 2022	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1,959	$ 2,026
Estimated future compensation expense		$ 16,800
Period for recognition		2 years 5 months 15 days
Fair value of common stock awards vested		$ 5,605	6,903
Stock based compensation expense		$ 2,445	$ 2,412
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)		119,767	77,284
Excess tax expense (benefits) on vested restricted stock		$ 85	$ (354)
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)		37,938	20,742
Period for recognition		2 years 3 months 21 days
Stock based compensation expense		$ 486	$ 386
Unrecognized compensation expense		4,685
Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 9,545
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)	0
2022 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)	1,500,000
Remaining available for grant for future awards (shares)		1,367,851
2022 Equity Incentive Plan | Minimum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period		1 year
2022 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%
2022 Equity Incentive Plan | Maximum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period		5 years
2022 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	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Number of Shares
Nonvested shares, beginning balance (shares)	309,015	363,551
Granted during the period (shares)	119,767	77,284
Vested during the period (shares)	(92,830)	(91,224)
Forfeited during the period (shares)	(1,763)	(715)
Nonvested shares, ending balance (shares)	334,189	348,896
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 60.12	$ 53.14
Granted during the period (usd per share)	60.21	73.94
Vested during the period (usd per share)	64.55	57.55
Forfeited during the period (usd per share)	63.23	67.56
Nonvested shares, ending balance (usd per share)	$ 58.91	$ 56.57

Stock Awards - Future Vesting S

Stock Awards - Future Vesting Schedule of Nonvested Shares (Details)	Mar. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	334,189
First year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	145,054
Second year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	116,105
Third year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	59,490
Fourth year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	13,540

Stock Awards - Schedule of Nonv

Stock Awards - Schedule of Nonvested Restricted Stock Awards (Details) - Performance stock units - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Number of Shares
Nonvested shares, beginning balance (shares)	140,240	114,498
Granted during the period (shares)	37,938	20,742
Nonvested shares, ending balance (shares)	178,178	135,240
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 49.20	$ 43.93
Granted during the period (usd per share)	60.21	73.94
Nonvested shares, ending balance (usd per share)	$ 51.55	$ 48.53

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Consolidated
Total capital to risk weighted assets:
Actual Amount	$ 1,857,290	$ 1,936,363
Actual Ratio (percent)	0.1188	0.1235
Minimum capital required plus capital conservation buffer amount	$ 1,641,617	$ 1,645,772
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,563,445	$ 1,567,402
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,571,885	$ 1,637,191
Actual Ratio (percent)	0.1005	0.1045
Minimum capital required plus capital conservation buffer amount	$ 1,328,928	$ 1,332,291
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 938,067	$ 940,441
Required to be considered well capitalized (percent)	0.0600	0.0600
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,516,285	$ 1,581,591
Actual ratio (percent)	0.0970	0.1009
Minimum capital required plus capital conservation buffer amount	$ 1,094,411	$ 1,097,181
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Tier 1 capital to average assets:
Actual Amount	$ 1,571,885	$ 1,637,191
Actual Ratio (percent)	0.0901	0.0949
Minimum capital required plus capital conservation buffer amount	$ 697,990	$ 690,309
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Bank
Total capital to risk weighted assets:
Actual Amount	$ 2,032,009	$ 2,013,874
Actual Ratio (percent)	0.1300	0.1285
Minimum capital required plus capital conservation buffer amount	$ 1,641,162	$ 1,645,236
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,563,011	$ 1,566,891
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,898,604	$ 1,896,702
Actual Ratio (percent)	0.1215	0.1210
Minimum capital required plus capital conservation buffer amount	$ 1,328,559	$ 1,331,858
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 1,250,409	$ 1,253,513
Required to be considered well capitalized (percent)	0.0800	0.0800
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,898,604	$ 1,896,702
Actual ratio (percent)	0.1215	0.1210
Minimum capital required plus capital conservation buffer amount	$ 1,094,108	$ 1,096,824
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Required to be considered well capitalized amount	$ 1,015,957	$ 1,018,479
Required to be considered well capitalized (percent)	0.0650	0.0650
Tier 1 capital to average assets:
Actual Amount	$ 1,898,604	$ 1,896,702
Actual Ratio (percent)	0.1088	0.1099
Minimum capital required plus capital conservation buffer amount	$ 697,805	$ 690,130
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Required to be considered well capitalized amount	$ 872,256	$ 862,663
Required to be considered well capitalized (percent)	0.0500	0.0500

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Jan. 31, 2023
Regulatory Assets [Line Items]
Common stock repurchased	$ 1,617,000	$ 2,789,000
Common stock purchased to settle employee tax withholding related to vesting of stock awards (shares)	26,777	26,131
Common stock purchased to settle employee tax withholding related to vesting of stock awards	$ 1,617,000	$ 1,976,000
2022 Share Repurchase Program
Regulatory Assets [Line Items]
Common stock repurchased (shares)		11,444
Common stock repurchased		$ 813,000
2023 Share Repurchase Program
Regulatory Assets [Line Items]
Share repurchase program authorized amount			$ 125,000,000
Common stock repurchased (shares)	0

Subsequent Event (Details)

Subsequent Event (Details)	Apr. 20, 2023 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.38