Independent Bank (IBTX) 10-Q 23 Apr 24 2024 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2024	Apr. 19, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
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		41,379,492
Amendment Flag	false
Document Fiscal Year Focus	2024
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, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 80,599	$ 98,396
Interest-bearing deposits in other banks	649,399	623,593
Cash and cash equivalents	729,998	721,989
Certificates of deposit held in other banks	248	248
Securities available for sale, at fair value	1,543,247	1,593,751
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively, fair value of $166,736 and $170,997, respectively	204,776	205,232
Loans held for sale (includes $12,372 and $12,016 carried at fair value, respectively)	21,299	16,420
Loans, net of allowance for credit losses of $148,437 and $151,861, respectively	14,465,456	14,558,681
Premises and equipment, net	352,325	355,833
Other real estate owned	8,685	9,490
Federal Home Loan Bank (FHLB) of Dallas stock and other restricted stock	11,493	34,915
Bank-owned life insurance (BOLI)	247,052	245,497
Deferred tax asset	95,063	92,665
Goodwill	994,021	994,021
Other intangible assets, net	47,485	50,560
Other assets	150,304	155,800
Total assets	18,871,452	19,035,102
Deposits:
Noninterest-bearing	3,300,773	3,530,704
Interest-bearing	12,370,942	12,192,331
Total deposits	15,671,715	15,723,035
FHLB advances	0	350,000
Other borrowings	496,975	271,821
Junior subordinated debentures	54,667	54,617
Other liabilities	247,288	233,036
Total liabilities	16,470,645	16,632,509
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,377,745 and 41,281,919 shares outstanding, respectively)	414	413
Additional paid-in capital	1,969,291	1,966,686
Retained earnings	624,017	616,724
Accumulated other comprehensive loss	(192,915)	(181,230)
Total stockholders’ equity	2,400,807	2,402,593
Total liabilities and stockholders’ equity	$ 18,871,452	$ 19,035,102

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Allowance for credit losses, securities held to maturity	$ 0	$ 0
Investment securities held to maturity	166,736,000
Loans held for sale, fair value option	12,372,000	12,016,000
Allowance for credit losses	$ 148,437,000	$ 151,861,000
Preferred stock, shares outstanding (shares)	0	0
Common stock, shares outstanding (shares)	41,377,745	41,281,919
Obligations of state and municipal subdivisions
Investment securities held to maturity	$ 166,736,000	$ 170,997,000

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Interest and fees on loans	$ 215,511	$ 184,294
Interest on taxable securities	7,645	7,858
Interest on nontaxable securities	2,518	2,603
Interest on interest-bearing deposits and other	9,531	6,421
Total interest income	235,205	201,176
Interest expense:
Interest on deposits	122,510	62,261
Interest on FHLB advances	2,855	5,824
Interest on other borrowings	5,582	4,079
Interest on junior subordinated debentures	1,227	1,090
Total interest expense	132,174	73,254
Net interest income	103,031	127,922
Provision for credit losses	(3,200)	90
Net interest income after provision for credit losses	106,231	127,832
Noninterest income:
Service charges on deposit accounts	3,600	3,349
Investment management fees	2,644	2,301
Mortgage banking revenue	1,635	1,624
Mortgage warehouse purchase program fees	540	324
Gain on sale of loans	74	0
Gain on sale of other real estate	13	0
Gain on sale and disposal of premises and equipment	0	47
Increase in cash surrender value of BOLI	1,555	1,377
Other	2,809	3,732
Total noninterest income	12,870	12,754
Noninterest expense:
Salaries and employee benefits	47,333	46,275
Occupancy	12,549	11,559
Communications and technology	7,685	7,090
FDIC assessment	6,142	2,712
Advertising and public relations	415	604
Other real estate owned expenses (income), net	65	(44)
Impairment of other real estate	345	1,200
Amortization of other intangible assets	3,075	3,111
Litigation settlement	0	102,500
Professional fees	1,809	3,065
Other	9,055	11,308
Total noninterest expense	88,473	189,380
Income (loss) before taxes	30,628	(48,794)
Income tax expense (benefit)	6,478	(11,284)
Net income (loss)	$ 24,150	$ (37,510)
Basic earnings per share (usd per share)	$ 0.58	$ (0.91)
Diluted earnings per share (usd per share)	$ 0.58	$ (0.91)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 24,150	$ (37,510)
Other comprehensive (loss) income before tax:
Unrealized (losses) gains arising during the period	(13,942)	20,771
Tax effect	(2,928)	4,362
Unrealized (losses) gains arising during the period, net of tax	(11,014)	16,409
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 (losses) gains on securities, net of tax	(11,018)	16,405
Unrealized holding (losses) gains arising during the period	(1,966)	940
Tax effect	(413)	197
Unrealized (losses) gains arising during the period, net of tax	(1,553)	743
Reclassification of amount of losses recognized into income	1,122	894
Tax effect	236	188
Reclassification of amount of losses recognized into income, net of tax	886	706
Change in unrealized (losses) gains on derivative financial instruments	(667)	1,449
Other comprehensive (loss) income, net of tax	(11,685)	17,854
Comprehensive income (loss)	$ 12,465	$ (19,656)

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
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 income (loss)	(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 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, 2024 and 2023 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
Beginning balance at Dec. 31, 2023	2,402,593	0	$ 413	1,966,686	616,724	(181,230)
Beginning balance (shares) at Dec. 31, 2023			41,281,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,150				24,150
Other comprehensive income (loss), net of tax	(11,685)					(11,685)
Common stock repurchased (shares)			(24,354)
Common stock repurchased	(1,129)		$ 0		(1,129)
Restricted stock forfeited (shares)			(2,072)
Restricted stock forfeited	0		$ 0
Restricted stock granted (shares)			122,252
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	2,606			2,606
Cash dividends ($0.38 and $0.38 per share for the three months ended March 31, 2024 and 2023 respectively)	(15,728)				(15,728)
Ending balance at Mar. 31, 2024	$ 2,400,807	$ 0	$ 414	$ 1,969,291	$ 624,017	$ (192,915)
Ending balance (shares) at Mar. 31, 2024			41,377,745

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
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, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ 24,150	$ (37,510)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	4,911	4,433
Accretion income recognized on loans	(773)	(1,115)
Amortization of other intangibles assets	3,075	3,111
Amortization of premium on securities, net	1,401	1,861
Amortization of discount and origination costs on borrowings	204	591
Stock based compensation expense	2,606	2,445
Excess tax expense on restricted stock vested	313	85
FHLB stock dividends	(483)	(397)
Gain on sale and disposal of premises and equipment	0	(47)
Gain on sale of loans	(74)	0
Gain on sale of other real estate owned	(13)	0
Impairment of other real estate	345	1,200
Impairment of other assets	0	802
Deferred tax expense (benefit)	708	(17,347)
Provision for credit losses	(3,200)	90
Increase in cash surrender value of BOLI	(1,555)	(1,377)
Excess benefit claim on BOLI	0	(318)
Net gain on mortgage loans held for sale	(910)	(1,209)
Originations of loans held for sale	(57,971)	(56,152)
Proceeds from sale of loans held for sale	54,002	52,095
Net change in other assets	8,881	15,058
Net change in other liabilities	2,679	61,952
Net cash provided by operating activities	38,296	28,251
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns, AFS	1,335,366	35,731
Purchases AFS	(1,299,754)	0
Proceeds from benefit claim of BOLI	0	748
Purchases of FHLB stock and other restricted stock	(3,455)	(61,575)
Proceeds from redemptions of FHLB stock and other restricted stock	26,879	0
Proceeds from sale of loans	8,228	0
Net loans paid (originated) held for investment	101,440	(3,889)
Originations of mortgage warehouse purchase loans	(3,305,227)	(2,238,118)
Proceeds from pay-offs of mortgage warehouse purchase loans	3,300,300	2,149,670
Additions to premises and equipment	(1,403)	(3,746)
Proceeds from sale of premises and equipment	0	188
Proceeds from sale of other real estate owned	473	0
Net cash provided by (used in) investing activities	162,847	(120,991)
Cash flows from financing activities:
Net decrease in demand deposits, money market and savings accounts	(9,509)	(1,500,907)
Net (decrease) increase in time deposits	(41,811)	435,177
Proceeds from FHLB advances	1,050,000	3,350,000
Repayments of FHLB advances	(1,400,000)	(1,850,000)
Proceeds from other borrowings	228,634	100,000
Repayments of other borrowings	(3,634)	(30,000)
Repurchase of common stock	(1,129)	(1,617)
Dividends paid	(15,685)	(15,645)
Net cash (used in) provided by financing activities	(193,134)	487,008
Net change in cash and cash equivalents	8,009	394,268
Cash and cash equivalents at beginning of period	721,989	654,322
Cash and cash equivalents at end of period	$ 729,998	$ 1,048,590

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
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, 2023. The consolidated balance sheet at December 31, 2023 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 Securities and Exchange Commission (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 three months ended March 31, 2024, continued market volatility resulted in a decline in the Company's stock price and market capitalization. Management evaluated current conditions and concluded there have been no significant changes in the economic environment or future projections since the annual goodwill impairment test performed as of December 31, 2023 and therefore, believes that there is no impairment as of March 31, 2024. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes. Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the three months ended March 31, 2024 and 2023. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price. The following table presents a reconciliation of net income (loss) available to common shareholders and the number of shares used in the calculation of basic and diluted earnings (loss) per common share: Three Months Ended March 31, 2024 2023 Basic earnings per share: Net income (loss) $ 24,150 $ (37,510) Less: Undistributed earnings (loss) allocated to participating securities 24 (206) Dividends paid on participating securities 45 61 Net income (loss) available to common shareholders $ 24,081 $ (37,365) Weighted average basic shares outstanding 41,205,080 41,063,527 Basic earnings (loss) per share $ 0.58 $ (0.91) Diluted earnings per share: Net income (loss) available to common shareholders $ 24,081 $ (37,365) Total weighted average basic shares outstanding 41,205,080 41,063,527 Add dilutive performance stock units 109,298 93,422 Total weighted average diluted shares outstanding 41,314,378 41,156,949 Diluted earnings (loss) per share $ 0.58 $ (0.91) Anti-dilutive participating securities 45,899 58,891

Cash Flows

Cash Flows	3 Months Ended
	Mar. 31, 2024
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, 2024 2023 Cash transactions: Interest expense paid $ 129,417 $ 72,029 Income taxes paid $ — $ 20 Noncash transactions: Deferred dividend equivalents $ 43 $ 53 Right-of-use assets obtained in exchange for lease liabilities $ 2,909 $ 3,556 Loans purchased, not yet settled $ 7,285 $ 4,987

Securities

Securities	3 Months Ended
	Mar. 31, 2024
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, 2024 and December 31, 2023 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale March 31, 2024 U.S. treasuries $ 212,895 $ — $ (14,346) $ 198,549 Government agency securities 467,694 — (75,283) 392,411 Obligations of state and municipal subdivisions 233,756 36 (11,306) 222,486 Corporate bonds 43,000 — (6,842) 36,158 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 821,295 4 (128,156) 693,143 Other securities 500 — — 500 $ 1,779,140 $ 40 $ (235,933) $ 1,543,247 December 31, 2023 U.S. treasuries $ 228,231 $ — $ (14,009) $ 214,222 Government agency securities 467,754 — (71,648) 396,106 Obligations of state and municipal subdivisions 237,146 122 (9,634) 227,634 Corporate bonds 43,000 — (7,180) 35,820 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 839,071 8 (119,610) 719,469 Other securities 500 — — 500 $ 1,815,702 $ 130 $ (222,081) $ 1,593,751 Securities Held to Maturity March 31, 2024 Obligations of state and municipal subdivisions $ 204,776 $ 82 $ (38,122) $ 166,736 December 31, 2023 Obligations of state and municipal subdivisions $ 205,232 $ 264 $ (34,499) $ 170,997 ____________ (1) Excludes accrued interest receivable of $6,381 and $7,129 on available for sale and $868 and $2,365 on held to maturity securities at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. The amortized cost and estimated fair value of securities at March 31, 2024, 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, 2024 Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 86,451 $ 85,299 $ — $ — Due from one year to five years 329,293 304,189 — — Due from five to ten years 396,148 336,614 — — Thereafter 145,953 124,002 204,776 166,736 957,845 850,104 204,776 166,736 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 821,295 693,143 — — $ 1,779,140 $ 1,543,247 $ 204,776 $ 166,736 Securities with a fair value of approximately $1,048,925 and $950,604 at March 31, 2024 and December 31, 2023, respectively, were pledged primarily to secure deposits. There were no sales of securities during the three months ended March 31, 2024 and 2023. The 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, 2024 and December 31, 2023, are summarized as follows for available for sale securities: Less Than 12 Months Greater Than 12 Months Total Description of Securities Estimated Unrealized Estimated Unrealized Estimated Unrealized Securities Available for Sale March 31, 2024 U.S. treasuries $ — $ — $ 198,549 $ (14,346) $ 198,549 $ (14,346) Government agency securities — — 392,411 (75,283) 392,411 (75,283) Obligations of state and municipal subdivisions 30,135 (158) 176,063 (11,148) 206,198 (11,306) Corporate bonds — — 33,158 (6,842) 33,158 (6,842) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 8,684 (330) 684,026 (127,826) 692,710 (128,156) $ 38,819 $ (488) $ 1,484,207 $ (235,445) $ 1,523,026 $ (235,933) December 31, 2023 U.S. treasuries $ — $ — $ 214,222 $ (14,009) $ 214,222 $ (14,009) Government agency securities — — 396,106 (71,648) 396,106 (71,648) Obligations of state and municipal subdivisions 40,864 (360) 147,529 (9,274) 188,393 (9,634) Corporate bonds — — 32,820 (7,180) 32,820 (7,180) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 8,724 (312) 710,301 (119,298) 719,025 (119,610) $ 49,588 $ (672) $ 1,500,978 $ (221,409) $ 1,550,566 $ (222,081) 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, 2024 , 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, 2024 . The Company's held to maturity securities include taxable and tax-exempt municipal securities issued primarily by school districts but also may include utility districts or other 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. Substantially all of the Company's held to maturity securities are guaranteed by the Texas Permanent School Fund (PSF), which is a sovereign wealth fund that serves to provide revenues for funding of public primary and secondary education in the State of Texas. At March 31, 2024 , all of the Company's held to maturity securities were rated AAA/Aaa by Moody's and/or Standard & Poor's bond rating services. Furthermore, as of March 31, 2024 , 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, 2024 .

Loans, Net and Allowance for Cr

Loans, Net and Allowance for Credit Losses on Loans	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Loans, Net and Allowance for Credit Losses on Loans	Note 4. Loans, Net and Allowance for Credit Losses on Loans Loans, net, at March 31, 2024 and December 31, 2023, consisted of the following: March 31, December 31, 2024 2023 Commercial $ 2,194,304 $ 2,266,851 Mortgage warehouse purchase loans 554,616 549,689 Real estate: Commercial 8,356,403 8,289,124 Commercial construction, land and land development 1,169,555 1,231,484 Residential 1,690,004 1,669,786 Single-family interim construction 460,568 517,928 Agricultural 112,070 109,451 Consumer 76,373 76,229 Total loans (1) 14,613,893 14,710,542 Allowance for credit losses (148,437) (151,861) Total loans, net (1) $ 14,465,456 $ 14,558,681 ____________ (1) Excludes accrued interest receivable of $55,293 and $54,563 at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. Loans with carrying amounts of $8,221,272 and $8,109,607 at March 31, 2024 and December 31, 2023, 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, 2024 and December 31, 2023, there were approximately $641,328 and $621,883, of energy related loans outstanding, respectively. 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 as well as granularity with moderate average loan sizes. 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, 2024, the portfolio consisted of approximately 21% 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, 2024, loans in the North Texas region represented about 35% of the total portfolio, followed by the Colorado Front Range region at about 27%, the Houston region at 25% and the Central Texas region at 13%. A large percentage of the Company’s portfolio consists of commercial and residential real estate loans. As of March 31, 2024 and December 31, 2023, 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 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, various price indices, and/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, 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. The majority 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. Independent loan reviews cover a wide range of the loan portfolio, including large lending relationships, specifically targeted loan types, and if applicable recently acquired loan portfolios. These reviews include analysis of borrower’s financial condition, payment histories, review of loan documentation and collateral values to determine if a loan should be internally classified. Generally, once classified, an analysis is completed by the credit department to determine the amount of allocated allowance for credit loss required. Expected credit losses for collateral dependent loans, including loans where the borrower is experiencing financial difficulty but foreclosure is not probable, are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. The following is a summary of the activity in the allowance for credit losses on loans by class for the three months ended March 31, 2024 and 2023: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended March 31, 2024 Balance at beginning of period $ 34,793 $ 60,096 $ 31,494 $ 6,917 $ 17,437 $ 745 $ 379 $ 151,861 Provision for credit losses 504 5,690 (6,572) 345 (3,308) (121) 78 (3,384) Charge-offs (39) — — — — — (29) (68) Recoveries 28 — — — — — — 28 Balance at end of period $ 35,286 $ 65,786 $ 24,922 $ 7,262 $ 14,129 $ 624 $ 428 $ 148,437 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 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, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 27,523 $ 12,971 $ 21,534 $ 11,662 Commercial real estate 26,922 3,425 25,672 3,567 Commercial construction, land and land development — — — — Residential real estate 844 — — — Single-family interim construction — — — — Agricultural 75 19 75 19 Consumer — — — — $ 55,364 $ 16,415 $ 47,281 $ 15,248 Nonperforming loans by loan class at March 31, 2024 and December 31, 2023 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total March 31, 2024 Nonaccrual loans (1) $ 24,522 $ 27,780 $ 9 $ 3,164 $ — $ 75 $ 1 $ 55,551 Loans past due 90 days and still accruing 17 — — 687 — — 3 707 Total nonperforming loans $ 24,539 $ 27,780 $ 9 $ 3,851 $ — $ 75 $ 4 $ 56,258 December 31, 2023 Nonaccrual loans (1) $ 21,541 $ 26,564 $ 10 $ 2,111 $ — $ 75 $ 5 $ 50,306 Loans past due 90 days and still accruing — 14 — 1,480 — — — 1,494 Total nonperforming loans $ 21,541 $ 26,578 $ 10 $ 3,591 $ — $ 75 $ 5 $ 51,800 ____________ (1) There are $1,379 and $14 in loans on nonaccrual without an allowance for credit loss as of March 31, 2024 and December 31, 2023, 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, 2024 and 2023. 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, 2024, 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, 2024 and as of December 31, 2023: Loans Loans Total Past Current Total March 31, 2024 Commercial $ 1,979 $ 7,771 $ 9,750 $ 2,184,554 $ 2,194,304 Mortgage warehouse purchase loans — — — 554,616 554,616 Commercial real estate 9,556 13,883 23,439 8,332,964 8,356,403 Commercial construction, land and land development 2,851 — 2,851 1,166,704 1,169,555 Residential real estate 10,889 2,607 13,496 1,676,508 1,690,004 Single-family interim construction 3,845 — 3,845 456,723 460,568 Agricultural 36 75 111 111,959 112,070 Consumer 133 3 136 76,237 76,373 $ 29,289 $ 24,339 $ 53,628 $ 14,560,265 $ 14,613,893 December 31, 2023 Commercial $ 1,898 $ 4,883 $ 6,781 $ 2,260,070 $ 2,266,851 Mortgage warehouse purchase loans — — — 549,689 549,689 Commercial real estate 5,388 12,432 17,820 8,271,304 8,289,124 Commercial construction, land and land development 2,457 — 2,457 1,229,027 1,231,484 Residential real estate 7,477 2,282 9,759 1,660,027 1,669,786 Single-family interim construction 828 — 828 517,100 517,928 Agricultural — 75 75 109,376 109,451 Consumer 267 4 271 75,958 76,229 $ 18,315 $ 19,676 $ 37,991 $ 14,672,551 $ 14,710,542 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, 2024 and December 31, 2023: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Commercial Pass $ 14,474 $ 217,557 $ 210,703 $ 252,944 $ 70,046 $ 235,202 $ 1,032,847 $ 485 $ 2,034,258 Pass/Watch — 142 635 13,965 115 21,284 46,073 — 82,214 Special Mention — 1,316 547 16,535 80 160 9,248 — 27,886 Substandard 12,939 6,416 7,270 10,620 254 3,671 8,776 — 49,946 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 27,413 $ 225,431 $ 219,155 $ 294,064 $ 70,495 $ 260,317 $ 1,096,944 $ 485 $ 2,194,304 Current period gross write-offs $ — $ — $ — $ — $ — $ 39 $ — $ — $ 39 Mortgage warehouse purchase loans Pass $ 554,616 $ — $ — $ — $ — $ — $ — $ — $ 554,616 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 554,616 $ — $ — $ — $ — $ — $ — $ — $ 554,616 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial real estate Pass $ 205,216 $ 1,007,577 $ 2,557,231 $ 1,918,306 $ 893,396 $ 1,238,282 $ 53,171 $ 2,492 $ 7,875,671 Pass/Watch 511 19,302 97,355 49,112 26,294 77,822 20 — 270,416 Special Mention 6,666 35,466 45,532 28,617 28,987 16,784 — — 162,052 Substandard — 283 17,888 20,482 4,342 5,269 — — 48,264 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 212,393 $ 1,062,628 $ 2,718,006 $ 2,016,517 $ 953,019 $ 1,338,157 $ 53,191 $ 2,492 $ 8,356,403 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Commercial construction, land and land development Pass $ 77,275 $ 399,327 $ 390,805 $ 179,545 $ 31,539 $ 18,774 $ 20,171 $ — $ 1,117,436 Pass/Watch — 14,885 8,445 29 — 55 — — 23,414 Special Mention 1,463 24,178 539 — 2,430 — — — 28,610 Substandard 61 — 25 — — 9 — — 95 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 78,799 $ 438,390 $ 399,814 $ 179,574 $ 33,969 $ 18,838 $ 20,171 $ — $ 1,169,555 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Residential real estate Pass $ 25,294 $ 191,468 $ 534,836 $ 352,054 $ 211,419 $ 279,741 $ 77,131 $ — $ 1,671,943 Pass/Watch — — 357 786 2,952 2,976 85 — 7,156 Special Mention — 949 — 1,575 47 2,389 — — 4,960 Substandard — 388 653 13 492 4,251 148 — 5,945 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 25,294 $ 192,805 $ 535,846 $ 354,428 $ 214,910 $ 289,357 $ 77,364 $ — $ 1,690,004 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 58,163 $ 254,263 $ 70,000 $ 11,399 $ — $ — $ 62,218 $ — $ 456,043 Pass/Watch — — — — — — — — — Special Mention — 1,113 2,432 — — — — — 3,545 Substandard — 979 — — — — 1 — 980 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 58,163 $ 256,355 $ 72,432 $ 11,399 $ — $ — $ 62,219 $ — $ 460,568 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Agricultural Pass $ 1,892 $ 16,100 $ 34,833 $ 22,142 $ 9,576 $ 12,836 $ 12,995 $ 19 $ 110,393 Pass/Watch — — 1,658 — — — — — 1,658 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 1,892 $ 16,100 $ 36,491 $ 22,142 $ 9,576 $ 12,855 $ 12,995 $ 19 $ 112,070 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Consumer Pass $ 2,991 $ 5,276 $ 2,020 $ 643 $ 7,633 $ 1,525 $ 54,353 $ 15 $ 74,456 Pass/Watch — — — 1,916 — — — — 1,916 Special Mention — — — — — — — — — Substandard — — — 1 — — — — 1 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 2,991 $ 5,276 $ 2,020 $ 2,560 $ 7,633 $ 1,525 $ 54,353 $ 15 $ 76,373 Current period gross write-offs $ — $ 25 $ — $ — $ — $ 4 $ — $ — $ 29 Total loans Pass $ 939,921 $ 2,091,568 $ 3,800,428 $ 2,737,033 $ 1,223,609 $ 1,786,360 $ 1,312,886 $ 3,011 $ 13,894,816 Pass/Watch 511 34,329 108,450 65,808 29,361 102,137 46,178 — 386,774 Special Mention 8,129 63,022 49,050 46,727 31,544 19,333 9,248 — 227,053 Substandard 13,000 8,066 25,836 31,116 5,088 13,219 8,925 — 105,250 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 961,561 $ 2,196,985 $ 3,983,764 $ 2,880,684 $ 1,289,602 $ 1,921,049 $ 1,377,237 $ 3,011 $ 14,613,893 Current period gross write-offs $ — $ 25 $ — $ — $ — $ 43 $ — $ — $ 68 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 223,287 $ 211,182 $ 281,878 $ 78,695 $ 99,516 $ 161,184 $ 1,099,241 $ 347 $ 2,155,330 Pass/Watch 168 9,672 8,976 121 2,064 9,396 5,655 — 36,052 Special Mention 185 — 13,517 85 — 820 9,052 1,214 24,873 Substandard 6,949 7,428 20,509 291 2,453 1,944 7,636 3,386 50,596 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 230,589 $ 228,282 $ 324,880 $ 79,192 $ 104,033 $ 173,344 $ 1,121,584 $ 4,947 $ 2,266,851 Current period gross write-offs $ 285 $ — $ 301 $ 5 $ 73 $ 254 $ — $ — $ 918 Mortgage warehouse purchase loans Pass $ 549,689 $ — $ — $ — $ — $ — $ — $ — $ 549,689 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 549,689 $ — $ — $ — $ — $ — $ — $ — $ 549,689 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial real estate Pass $ 1,038,410 $ 2,570,061 $ 1,913,673 $ 900,786 $ 536,973 $ 805,784 $ 57,954 $ 5,827 $ 7,829,468 Pass/Watch 28,048 82,001 61,025 26,594 22,395 48,420 — — 268,483 Special Mention 22,624 37,445 20,647 23,607 12,211 14,884 — 346 131,764 Substandard 5,502 16,666 27,653 4,371 3,026 2,191 — — 59,409 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 1,094,584 $ 2,706,173 $ 2,022,998 $ 955,358 $ 574,605 $ 871,279 $ 57,954 $ 6,173 $ 8,289,124 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial construction, land and land development Pass $ 430,273 $ 430,458 $ 218,880 $ 51,127 $ 6,693 $ 13,633 $ 22,315 $ 74 $ 1,173,453 Pass/Watch 14,177 10,132 3,415 7,184 — 58 — — 34,966 Special Mention 224 — 22,491 314 — — — — 23,029 Substandard — 26 — — — 10 — — 36 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 444,674 $ 440,616 $ 244,786 $ 58,625 $ 6,693 $ 13,701 $ 22,315 $ 74 $ 1,231,484 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 197,436 $ 506,608 $ 356,360 $ 219,473 $ 136,968 $ 162,766 $ 71,494 $ 437 $ 1,651,542 Pass/Watch — 360 2,415 2,895 1,239 1,902 85 — 8,896 Special Mention — — — 47 1,492 1,607 — 262 3,408 Substandard 685 1,302 15 499 838 2,556 45 — 5,940 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 198,121 $ 508,270 $ 358,790 $ 222,914 $ 140,537 $ 168,831 $ 71,624 $ 699 $ 1,669,786 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 300,574 $ 133,211 $ 15,590 $ — $ — $ — $ 65,385 $ — $ 514,760 Pass/Watch 1,203 — — — — — — — 1,203 Special Mention 1,964 — — — — — 1 — 1,965 Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 303,741 $ 133,211 $ 15,590 $ — $ — $ — $ 65,386 $ — $ 517,928 Current period gross write-offs $ — $ — $ 27 $ — $ — $ — $ — $ — $ 27 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Agricultural Pass $ 16,543 $ 35,993 $ 22,472 $ 9,707 $ 3,470 $ 10,056 $ 9,435 $ — $ 107,676 Pass/Watch — 1,756 — — — — — — 1,756 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 16,543 $ 37,749 $ 22,472 $ 9,707 $ 3,470 $ 10,075 $ 9,435 $ — $ 109,451 Current period gross write-offs $ — $ 5 $ 1 $ — $ — $ — $ — $ — $ 6 Consumer Pass $ 6,348 $ 3,173 $ 900 $ 8,056 $ 1,267 $ 81 $ 54,392 $ 90 $ 74,307 Pass/Watch — — 1,917 — — — — — 1,917 Special Mention — — — — — — — — — Substandard — — 1 — — 4 — — 5 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 6,348 $ 3,173 $ 2,818 $ 8,056 $ 1,267 $ 85 $ 54,392 $ 90 $ 76,229 Current period gross write-offs $ 8 $ 9 $ — $ — $ — $ — $ — $ — $ 17 Total loans Pass $ 2,762,560 $ 3,890,686 $ 2,809,753 $ 1,267,844 $ 784,887 $ 1,153,504 $ 1,380,216 $ 6,775 $ 14,056,225 Pass/Watch 43,596 103,921 77,748 36,794 25,698 59,776 5,740 — 353,273 Special Mention 24,997 37,445 56,655 24,053 13,703 17,311 9,053 1,822 185,039 Substandard 13,136 25,422 48,178 5,161 6,317 6,724 7,681 3,386 116,005 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 2,844,289 $ 4,057,474 $ 2,992,334 $ 1,333,852 $ 830,605 $ 1,237,315 $ 1,402,690 $ 11,983 $ 14,710,542 Current period gross write-offs $ 293 $ 14 $ 1,525 $ 5 $ 73 $ 254 $ — $ — $ 2,164

Other Borrowings

Other Borrowings	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Other Borrowings	Note 5. Federal Home Loan Bank Advances and Other Borrowings At March 31, 2024, the Company had no advances from the FHLB of Dallas under note payable arrangements. The balances outstanding on these advances were $350,000 at December 31, 2023. Other borrowings totaled $496,975 and $271,821 at March 31, 2024 and December 31, 2023, respectively.

Off-Balance Sheet Arrangements,

Off-Balance Sheet Arrangements, Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Arrangements, Commitments and Contingencies	Note 6. 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, 2024 and December 31, 2023, the approximate amounts of these financial instruments were as follows: March 31, December 31, 2024 2023 Commitments to extend credit $ 3,173,761 $ 3,107,827 Standby letters of credit 28,942 31,627 $ 3,202,703 $ 3,139,454 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, 2024 2023 Balance at beginning of period $ 3,897 $ 3,944 Provision for off-balance sheet credit exposure 184 811 Balance at end of period $ 4,081 $ 4,755 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. The settlement and bar orders were approved by the Court on August 8, 2023. Once the litigation is dismissed, the Bank, as described in the settlement agreement, 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 was recognized in 2023 as litigation settlement expense included in noninterest expense on the accompanying income statement along with $2,500 in related legal and other fees. 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, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Note 7. Income Taxes Income tax expense (benefit) for the three months ended March 31, 2024 and 2023 was as follows: Three Months Ended March 31, 2024 2023 Income tax expense (benefit) for the period $ 6,478 $ (11,284) Effective tax rate 21.2 % 23.1 % The effective tax rates for 2024 and 2023 differ from the statutory federal tax rate of 21% largely due to tax exempt interest income earned on certain investment securities and loans, the nontaxable earnings on bank owned life insurance, nondeductible compensation, and state income tax. In addition, the effective rate for the three months ended March 31, 2023 is higher due to the Company being in a net loss position related to the litigation settlement.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 8. 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. 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, 2024 and December 31, 2023 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, 2024 Assets: Investment securities available for sale: U.S. treasuries $ 198,549 $ — $ 198,549 $ — Government agency securities 392,411 — 392,411 — Obligations of state and municipal subdivisions 222,486 — 222,486 — Corporate bonds 36,158 — 36,158 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 693,143 — 693,143 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 12,372 — 12,372 — Derivative financial instruments: Interest rate lock commitments 570 — 570 — Forward mortgage-backed securities trades 7 — 7 — Commercial loan interest rate swaps: Loan customer counterparty 44 — 44 — Financial institution counterparty 10,506 — 10,506 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 9,095 — 9,095 — Interest rate lock commitments 1 — 1 — Forward mortgage-backed securities trades 36 — 36 — Commercial loan interest rate swaps: Loan customer counterparty 10,439 — 10,439 — Financial institution counterparty 58 — 58 — December 31, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 214,222 $ — $ 214,222 $ — Government agency securities 396,106 — 396,106 — Obligations of state and municipal subdivisions 227,634 — 227,634 — Corporate bonds 35,820 — 35,820 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 719,469 — 719,469 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 12,016 — 12,016 — Derivative financial instruments: Interest rate lock commitments 507 — 507 — Forward mortgage-backed securities trades 4 — 4 — Commercial loan interest rate swaps: Loan customer counterparty 227 — 227 — Financial institution counterparty 9,472 — 9,472 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 8,256 — 8,256 — Forward mortgage-backed securities trades 43 — 43 — Commercial loan interest rate swaps: Loan customer counterparty 9,403 — 9,403 — Financial institution counterparty 261 — 261 — __________ (1) At March 31, 2024 and December 31, 2023, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $12,205 and $11,747, 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, 2024. 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 9, 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, 2024 and December 31, 2023, 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, 2024 Assets: Individually evaluated loans $ 4,482 $ — $ — $ 4,482 $ 1,429 December 31, 2023 Assets: Individually evaluated loans $ 5,822 $ — $ — $ 5,822 $ 3,525 Other real estate owned 9,490 — — 9,490 6,052 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, 2024 and December 31, 2023, 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, 2024 and December 31, 2023: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant March 31, 2024 Financial assets: Cash and cash equivalents $ 729,998 $ 729,998 $ 729,998 $ — $ — Certificates of deposit held in other banks 248 242 — 242 — Investment securities held to maturity 204,776 166,736 — 166,736 — Loans held for sale, at cost 8,927 9,047 — 9,047 — Loans, net 14,465,456 14,438,025 — — 14,438,025 FHLB of Dallas stock and other restricted stock 11,493 11,493 — 11,493 — Accrued interest receivable 63,438 63,438 — 63,438 — Financial liabilities: Deposits 15,671,715 15,636,153 — 15,636,153 — Accrued interest payable 46,410 46,410 — 46,410 — Other borrowings 496,975 485,475 — 485,475 — Junior subordinated debentures 54,667 66,611 — 66,611 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2023 Financial assets: Cash and cash equivalents $ 721,989 $ 721,989 $ 721,989 $ — $ — Certificates of deposit held in other banks 248 243 — 243 — Investment securities held to maturity 205,232 170,997 — 170,997 — Loans held for sale, at cost 4,404 4,506 — 4,506 — Loans, net 14,558,681 14,547,963 — — 14,547,963 FHLB of Dallas stock and other restricted stock 34,915 34,915 — 34,915 — Accrued interest receivable 64,237 64,237 — 64,237 — Financial liabilities: Deposits 15,723,035 15,697,806 — 15,697,806 — Accrued interest payable 43,653 43,653 — 43,653 — FHLB advances 350,000 350,022 — 350,022 — Other borrowings 271,821 257,975 — 257,975 — Junior subordinated debentures 54,617 68,735 — 68,735 — 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, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 9. 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, 2024. 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 losses recognized in accumulated other comprehensive income related to derivatives was $1,553, 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 $886, net of tax, during and for the three months ended March 31, 2024. 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 received on the Company’s variable-rate loans was $706, net of tax, during and for the three months ended March 31, 2023. During the next twelve months, the Company estimates that $3,934 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, 2024 and December 31, 2023: Outstanding Notional Balance Asset Derivative Liability Derivative March 31, 2024 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 9,095 Derivatives not designated as hedging instruments: Interest rate lock commitments 23,327 570 1 Forward mortgage-backed securities trades 17,000 7 36 Commercial loan interest rate swaps: Loan customer counterparty 199,102 44 10,439 Financial institution counterparty 199,102 10,506 58 December 31, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 8,256 Derivatives not designated as hedging instruments: Interest rate lock commitments 18,789 507 — Forward mortgage-backed securities trades 15,000 4 43 Commercial loan interest rate swaps: Loan customer counterparty 201,063 227 9,403 Financial institution counterparty 201,063 9,472 261 The credit exposure related to interest rate swaps is limited to the net favorable value of all swaps by each counterparty, which was approximately $10,550 and $9,699 at March 31, 2024 and December 31, 2023, 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, 2024 and December 31, 2023, cash of $10,515 and $10,242, respectively, and securities of $433 and $444, respectively, were pledged as collateral for these derivatives, respectively, and counterparties had deposited $2,400 of cash with the Company as of March 31, 2024. 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 one risk participation agreement as a participant bank having a notional amount of $1,481 at both March 31, 2024 and December 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 $8,734 and $8,805 at March 31, 2024 and December 31, 2023, respectively. 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 (loss) for the three months ended March 31, 2024 and 2023 is as follows: Income Statement Location Three Months Ended March 31, 2024 2023 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (1,127) $ (899) Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 62 182 Forward mortgage-backed securities trades Mortgage banking revenue 10 (204)

Stock Awards

Stock Awards	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock Awards	Note 10. Stock Awards The Company grants common stock awards to certain employees of the Company. In May 2022, the shareholders of the Company approved the 2022 Equity Incentive Plan (2022 Plan). Under this plan, the Compensation Committee may grant awards to certain employees and directors 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, 2024, there were 1,272,010 shares remaining available for grant for future awards. Shares issued under these plans are restricted stock awards and performance stock. Restricted stock awarded 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, 2024 and 2023: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2023 285,340 $ 58.99 Granted during the period 122,252 44.69 Vested during the period (81,772) 64.33 Forfeited during the period (2,072) 50.24 Nonvested shares, March 31, 2024 323,748 $ 52.30 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 Compensation expense related to these awards is recorded based on the fair value of the award at the date of grant and totaled $2,118 and $1,959 for the three months ended March 31, 2024 and 2023, respectively. Compensation expense is recorded in salaries and employee benefits in the accompanying consolidated statements of income (loss). At March 31, 2024, future compensation expense is estimated to be $14,107 and will be recognized over a remaining weighted average period of 2.18 years. The fair value of common stock awards that vested during the three months ended March 31, 2024 and 2023 was $3,786 and $5,605, respectively. The Company has recorded $313 and $85 in excess tax expense on vested restricted stock to income tax expense for the three months ended March 31, 2024 and 2023, respectively. There were no modifications of stock agreements during the three months ended March 31, 2024 and 2023 that resulted in significant additional incremental compensation costs. At March 31, 2024, the future vesting schedule of the nonvested restricted stock awards is as follows: Number of Shares First year 169,390 Second year 98,760 Third year 54,723 Fourth year 875 Total nonvested shares 323,748 Performance Stock Units Performance stock units represent shares potentially issuable in the future. For awards granted prior to 2024, 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. For awards granted in 2024, the number of shares issued is based upon two equally weighted measures 1) the Company's cumulative adjusted diluted earnings per share over the performance period, as defined by the Company, and 2) its relative total shareholder return over the award's performance period as compared to an identified peer group. 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, 2024 and 2023: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2023 178,178 $ 51.55 Granted during the period 37,738 44.69 Forfeited during the period (20,198) 62.58 Nonvested shares, March 31, 2024 195,718 $ 49.09 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 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 $488 and $486 for the three months ended March 31, 2024 and 2023, respectively. As of March 31, 2024, the unrecognized compensation expense is estimated to be $3,871. The remaining performance period over which the expense will be recognized is 2.20 years.

Regulatory Matters

Regulatory Matters	3 Months Ended
	Mar. 31, 2024
Regulated Operations [Abstract]
Regulatory Matters	Note 11. 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 connection with the adoption of ASC 326, the Company elected to adopt the permissible three year transition option to phase in the day one effects to capital. The deferral has been applied to capital ratios presented below through December 31, 2023. 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, 2024 and December 31, 2023, the Company and the Bank meet all capital adequacy requirements to which they are subject, including the capital buffer requirement. As of March 31, 2024 and December 31, 2023, 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, 2024 and December 31, 2023. 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, 2024 Total capital to risk weighted assets: Consolidated $ 1,898,365 11.68 % $ 1,707,015 10.50 % $ 1,625,728 10.00 % Bank 2,030,741 12.49 1,706,577 10.50 1,625,312 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,616,444 9.94 1,381,869 8.50 975,437 6.00 Bank 1,878,820 11.56 1,381,515 8.50 1,300,249 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,560,844 9.60 1,138,010 7.00 N/A N/A Bank 1,878,820 11.56 1,137,718 7.00 1,056,452 6.50 Tier 1 capital to average assets: Consolidated 1,616,444 8.91 725,554 4.00 N/A N/A Bank 1,878,820 10.36 725,364 4.00 906,704 5.00 December 31, 2023 Total capital to risk weighted assets: Consolidated $ 1,885,776 11.57 % $ 1,711,650 10.50 % $ 1,630,143 10.00 % Bank 2,020,376 12.40 1,711,142 10.50 1,629,659 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,617,985 9.93 1,385,621 8.50 978,086 6.00 Bank 1,882,585 11.55 1,385,210 8.50 1,303,727 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,562,385 9.58 1,141,100 7.00 N/A N/A Bank 1,882,585 11.55 1,140,761 7.00 1,059,278 6.50 Tier 1 capital to average assets: Consolidated 1,617,985 8.94 723,633 4.00 N/A N/A Bank 1,882,585 10.41 723,438 4.00 904,298 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. The Company is currently not under a stock repurchase program for 2024. There were no shares repurchased under the prior 2023 Plan during the three months ended March 31, 2023. Company stock repurchased to settle employee tax withholding related to vesting of stock awards totaled 24,354 shares at a total cost of $1,129 for the three months ended March 31, 2024 and 26,777 shares at a total cost of $1,617 for the three months ended March 31, 2023 and were not included under the repurchase program.

Subsequent Event

Subsequent Event	3 Months Ended
	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent Event	Note 12. Subsequent Events Declaration of Dividends On April 18, 2024, 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 2, 2024. The dividend will be paid on May 16, 2024.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income (loss)	$ 24,150	$ (37,510)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
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, 2023. The consolidated balance sheet at December 31, 2023 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 Securities and Exchange Commission (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 three months ended March 31, 2024, continued market volatility resulted in a decline in the Company's stock price and market capitalization. Management evaluated current conditions and concluded there have been no significant changes in the economic environment or future projections since the annual goodwill impairment test performed as of December 31, 2023 and therefore, believes that there is no impairment as of March 31, 2024. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes.
Earnings (loss) per share	Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the three months ended March 31, 2024 and 2023. 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, various price indices, and/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, 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. 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 9, Derivative Financial Instruments , for more information. Assets and Liabilities Measured on a Nonrecurring Basis 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.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Earning Per Share	The following table presents a reconciliation of net income (loss) available to common shareholders and the number of shares used in the calculation of basic and diluted earnings (loss) per common share: Three Months Ended March 31, 2024 2023 Basic earnings per share: Net income (loss) $ 24,150 $ (37,510) Less: Undistributed earnings (loss) allocated to participating securities 24 (206) Dividends paid on participating securities 45 61 Net income (loss) available to common shareholders $ 24,081 $ (37,365) Weighted average basic shares outstanding 41,205,080 41,063,527 Basic earnings (loss) per share $ 0.58 $ (0.91) Diluted earnings per share: Net income (loss) available to common shareholders $ 24,081 $ (37,365) Total weighted average basic shares outstanding 41,205,080 41,063,527 Add dilutive performance stock units 109,298 93,422 Total weighted average diluted shares outstanding 41,314,378 41,156,949 Diluted earnings (loss) per share $ 0.58 $ (0.91) Anti-dilutive participating securities 45,899 58,891

Cash Flows (Tables)

Cash Flows (Tables)	3 Months Ended
	Mar. 31, 2024
Supplemental Cash Flow Elements [Abstract]
Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Three Months Ended March 31, 2024 2023 Cash transactions: Interest expense paid $ 129,417 $ 72,029 Income taxes paid $ — $ 20 Noncash transactions: Deferred dividend equivalents $ 43 $ 53 Right-of-use assets obtained in exchange for lease liabilities $ 2,909 $ 3,556 Loans purchased, not yet settled $ 7,285 $ 4,987

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2024
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, 2024 and December 31, 2023 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale March 31, 2024 U.S. treasuries $ 212,895 $ — $ (14,346) $ 198,549 Government agency securities 467,694 — (75,283) 392,411 Obligations of state and municipal subdivisions 233,756 36 (11,306) 222,486 Corporate bonds 43,000 — (6,842) 36,158 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 821,295 4 (128,156) 693,143 Other securities 500 — — 500 $ 1,779,140 $ 40 $ (235,933) $ 1,543,247 December 31, 2023 U.S. treasuries $ 228,231 $ — $ (14,009) $ 214,222 Government agency securities 467,754 — (71,648) 396,106 Obligations of state and municipal subdivisions 237,146 122 (9,634) 227,634 Corporate bonds 43,000 — (7,180) 35,820 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 839,071 8 (119,610) 719,469 Other securities 500 — — 500 $ 1,815,702 $ 130 $ (222,081) $ 1,593,751 Securities Held to Maturity March 31, 2024 Obligations of state and municipal subdivisions $ 204,776 $ 82 $ (38,122) $ 166,736 December 31, 2023 Obligations of state and municipal subdivisions $ 205,232 $ 264 $ (34,499) $ 170,997 ____________ (1) Excludes accrued interest receivable of $6,381 and $7,129 on available for sale and $868 and $2,365 on held to maturity securities at March 31, 2024 and December 31, 2023, 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, 2024, 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, 2024 Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 86,451 $ 85,299 $ — $ — Due from one year to five years 329,293 304,189 — — Due from five to ten years 396,148 336,614 — — Thereafter 145,953 124,002 204,776 166,736 957,845 850,104 204,776 166,736 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 821,295 693,143 — — $ 1,779,140 $ 1,543,247 $ 204,776 $ 166,736
Summary of Unrealized Losses and Fair Value Securities in Continuous Unrealized Loss Position	The 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, 2024 and December 31, 2023, are summarized as follows for available for sale securities: Less Than 12 Months Greater Than 12 Months Total Description of Securities Estimated Unrealized Estimated Unrealized Estimated Unrealized Securities Available for Sale March 31, 2024 U.S. treasuries $ — $ — $ 198,549 $ (14,346) $ 198,549 $ (14,346) Government agency securities — — 392,411 (75,283) 392,411 (75,283) Obligations of state and municipal subdivisions 30,135 (158) 176,063 (11,148) 206,198 (11,306) Corporate bonds — — 33,158 (6,842) 33,158 (6,842) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 8,684 (330) 684,026 (127,826) 692,710 (128,156) $ 38,819 $ (488) $ 1,484,207 $ (235,445) $ 1,523,026 $ (235,933) December 31, 2023 U.S. treasuries $ — $ — $ 214,222 $ (14,009) $ 214,222 $ (14,009) Government agency securities — — 396,106 (71,648) 396,106 (71,648) Obligations of state and municipal subdivisions 40,864 (360) 147,529 (9,274) 188,393 (9,634) Corporate bonds — — 32,820 (7,180) 32,820 (7,180) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 8,724 (312) 710,301 (119,298) 719,025 (119,610) $ 49,588 $ (672) $ 1,500,978 $ (221,409) $ 1,550,566 $ (222,081)

Loans, Net and Allowance for _2

Loans, Net and Allowance for Credit Losses on Loans (Tables)	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Compositions of Loans	Loans, net, at March 31, 2024 and December 31, 2023, consisted of the following: March 31, December 31, 2024 2023 Commercial $ 2,194,304 $ 2,266,851 Mortgage warehouse purchase loans 554,616 549,689 Real estate: Commercial 8,356,403 8,289,124 Commercial construction, land and land development 1,169,555 1,231,484 Residential 1,690,004 1,669,786 Single-family interim construction 460,568 517,928 Agricultural 112,070 109,451 Consumer 76,373 76,229 Total loans (1) 14,613,893 14,710,542 Allowance for credit losses (148,437) (151,861) Total loans, net (1) $ 14,465,456 $ 14,558,681 ____________ (1)
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, 2024 and 2023: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended March 31, 2024 Balance at beginning of period $ 34,793 $ 60,096 $ 31,494 $ 6,917 $ 17,437 $ 745 $ 379 $ 151,861 Provision for credit losses 504 5,690 (6,572) 345 (3,308) (121) 78 (3,384) Charge-offs (39) — — — — — (29) (68) Recoveries 28 — — — — — — 28 Balance at end of period $ 35,286 $ 65,786 $ 24,922 $ 7,262 $ 14,129 $ 624 $ 428 $ 148,437 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
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, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 27,523 $ 12,971 $ 21,534 $ 11,662 Commercial real estate 26,922 3,425 25,672 3,567 Commercial construction, land and land development — — — — Residential real estate 844 — — — Single-family interim construction — — — — Agricultural 75 19 75 19 Consumer — — — — $ 55,364 $ 16,415 $ 47,281 $ 15,248
Summary of Nonperforming Loans by Loan Class	Nonperforming loans by loan class at March 31, 2024 and December 31, 2023 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total March 31, 2024 Nonaccrual loans (1) $ 24,522 $ 27,780 $ 9 $ 3,164 $ — $ 75 $ 1 $ 55,551 Loans past due 90 days and still accruing 17 — — 687 — — 3 707 Total nonperforming loans $ 24,539 $ 27,780 $ 9 $ 3,851 $ — $ 75 $ 4 $ 56,258 December 31, 2023 Nonaccrual loans (1) $ 21,541 $ 26,564 $ 10 $ 2,111 $ — $ 75 $ 5 $ 50,306 Loans past due 90 days and still accruing — 14 — 1,480 — — — 1,494 Total nonperforming loans $ 21,541 $ 26,578 $ 10 $ 3,591 $ — $ 75 $ 5 $ 51,800 ____________ (1)
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, 2024 and as of December 31, 2023: Loans Loans Total Past Current Total March 31, 2024 Commercial $ 1,979 $ 7,771 $ 9,750 $ 2,184,554 $ 2,194,304 Mortgage warehouse purchase loans — — — 554,616 554,616 Commercial real estate 9,556 13,883 23,439 8,332,964 8,356,403 Commercial construction, land and land development 2,851 — 2,851 1,166,704 1,169,555 Residential real estate 10,889 2,607 13,496 1,676,508 1,690,004 Single-family interim construction 3,845 — 3,845 456,723 460,568 Agricultural 36 75 111 111,959 112,070 Consumer 133 3 136 76,237 76,373 $ 29,289 $ 24,339 $ 53,628 $ 14,560,265 $ 14,613,893 December 31, 2023 Commercial $ 1,898 $ 4,883 $ 6,781 $ 2,260,070 $ 2,266,851 Mortgage warehouse purchase loans — — — 549,689 549,689 Commercial real estate 5,388 12,432 17,820 8,271,304 8,289,124 Commercial construction, land and land development 2,457 — 2,457 1,229,027 1,231,484 Residential real estate 7,477 2,282 9,759 1,660,027 1,669,786 Single-family interim construction 828 — 828 517,100 517,928 Agricultural — 75 75 109,376 109,451 Consumer 267 4 271 75,958 76,229 $ 18,315 $ 19,676 $ 37,991 $ 14,672,551 $ 14,710,542
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, 2024 and December 31, 2023: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Commercial Pass $ 14,474 $ 217,557 $ 210,703 $ 252,944 $ 70,046 $ 235,202 $ 1,032,847 $ 485 $ 2,034,258 Pass/Watch — 142 635 13,965 115 21,284 46,073 — 82,214 Special Mention — 1,316 547 16,535 80 160 9,248 — 27,886 Substandard 12,939 6,416 7,270 10,620 254 3,671 8,776 — 49,946 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 27,413 $ 225,431 $ 219,155 $ 294,064 $ 70,495 $ 260,317 $ 1,096,944 $ 485 $ 2,194,304 Current period gross write-offs $ — $ — $ — $ — $ — $ 39 $ — $ — $ 39 Mortgage warehouse purchase loans Pass $ 554,616 $ — $ — $ — $ — $ — $ — $ — $ 554,616 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 554,616 $ — $ — $ — $ — $ — $ — $ — $ 554,616 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial real estate Pass $ 205,216 $ 1,007,577 $ 2,557,231 $ 1,918,306 $ 893,396 $ 1,238,282 $ 53,171 $ 2,492 $ 7,875,671 Pass/Watch 511 19,302 97,355 49,112 26,294 77,822 20 — 270,416 Special Mention 6,666 35,466 45,532 28,617 28,987 16,784 — — 162,052 Substandard — 283 17,888 20,482 4,342 5,269 — — 48,264 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 212,393 $ 1,062,628 $ 2,718,006 $ 2,016,517 $ 953,019 $ 1,338,157 $ 53,191 $ 2,492 $ 8,356,403 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Commercial construction, land and land development Pass $ 77,275 $ 399,327 $ 390,805 $ 179,545 $ 31,539 $ 18,774 $ 20,171 $ — $ 1,117,436 Pass/Watch — 14,885 8,445 29 — 55 — — 23,414 Special Mention 1,463 24,178 539 — 2,430 — — — 28,610 Substandard 61 — 25 — — 9 — — 95 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 78,799 $ 438,390 $ 399,814 $ 179,574 $ 33,969 $ 18,838 $ 20,171 $ — $ 1,169,555 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Residential real estate Pass $ 25,294 $ 191,468 $ 534,836 $ 352,054 $ 211,419 $ 279,741 $ 77,131 $ — $ 1,671,943 Pass/Watch — — 357 786 2,952 2,976 85 — 7,156 Special Mention — 949 — 1,575 47 2,389 — — 4,960 Substandard — 388 653 13 492 4,251 148 — 5,945 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 25,294 $ 192,805 $ 535,846 $ 354,428 $ 214,910 $ 289,357 $ 77,364 $ — $ 1,690,004 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 58,163 $ 254,263 $ 70,000 $ 11,399 $ — $ — $ 62,218 $ — $ 456,043 Pass/Watch — — — — — — — — — Special Mention — 1,113 2,432 — — — — — 3,545 Substandard — 979 — — — — 1 — 980 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 58,163 $ 256,355 $ 72,432 $ 11,399 $ — $ — $ 62,219 $ — $ 460,568 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Agricultural Pass $ 1,892 $ 16,100 $ 34,833 $ 22,142 $ 9,576 $ 12,836 $ 12,995 $ 19 $ 110,393 Pass/Watch — — 1,658 — — — — — 1,658 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 1,892 $ 16,100 $ 36,491 $ 22,142 $ 9,576 $ 12,855 $ 12,995 $ 19 $ 112,070 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans March 31, 2024 2024 2023 2022 2021 2020 Prior Total Consumer Pass $ 2,991 $ 5,276 $ 2,020 $ 643 $ 7,633 $ 1,525 $ 54,353 $ 15 $ 74,456 Pass/Watch — — — 1,916 — — — — 1,916 Special Mention — — — — — — — — — Substandard — — — 1 — — — — 1 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 2,991 $ 5,276 $ 2,020 $ 2,560 $ 7,633 $ 1,525 $ 54,353 $ 15 $ 76,373 Current period gross write-offs $ — $ 25 $ — $ — $ — $ 4 $ — $ — $ 29 Total loans Pass $ 939,921 $ 2,091,568 $ 3,800,428 $ 2,737,033 $ 1,223,609 $ 1,786,360 $ 1,312,886 $ 3,011 $ 13,894,816 Pass/Watch 511 34,329 108,450 65,808 29,361 102,137 46,178 — 386,774 Special Mention 8,129 63,022 49,050 46,727 31,544 19,333 9,248 — 227,053 Substandard 13,000 8,066 25,836 31,116 5,088 13,219 8,925 — 105,250 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 961,561 $ 2,196,985 $ 3,983,764 $ 2,880,684 $ 1,289,602 $ 1,921,049 $ 1,377,237 $ 3,011 $ 14,613,893 Current period gross write-offs $ — $ 25 $ — $ — $ — $ 43 $ — $ — $ 68 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 223,287 $ 211,182 $ 281,878 $ 78,695 $ 99,516 $ 161,184 $ 1,099,241 $ 347 $ 2,155,330 Pass/Watch 168 9,672 8,976 121 2,064 9,396 5,655 — 36,052 Special Mention 185 — 13,517 85 — 820 9,052 1,214 24,873 Substandard 6,949 7,428 20,509 291 2,453 1,944 7,636 3,386 50,596 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 230,589 $ 228,282 $ 324,880 $ 79,192 $ 104,033 $ 173,344 $ 1,121,584 $ 4,947 $ 2,266,851 Current period gross write-offs $ 285 $ — $ 301 $ 5 $ 73 $ 254 $ — $ — $ 918 Mortgage warehouse purchase loans Pass $ 549,689 $ — $ — $ — $ — $ — $ — $ — $ 549,689 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 549,689 $ — $ — $ — $ — $ — $ — $ — $ 549,689 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Commercial real estate Pass $ 1,038,410 $ 2,570,061 $ 1,913,673 $ 900,786 $ 536,973 $ 805,784 $ 57,954 $ 5,827 $ 7,829,468 Pass/Watch 28,048 82,001 61,025 26,594 22,395 48,420 — — 268,483 Special Mention 22,624 37,445 20,647 23,607 12,211 14,884 — 346 131,764 Substandard 5,502 16,666 27,653 4,371 3,026 2,191 — — 59,409 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 1,094,584 $ 2,706,173 $ 2,022,998 $ 955,358 $ 574,605 $ 871,279 $ 57,954 $ 6,173 $ 8,289,124 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial construction, land and land development Pass $ 430,273 $ 430,458 $ 218,880 $ 51,127 $ 6,693 $ 13,633 $ 22,315 $ 74 $ 1,173,453 Pass/Watch 14,177 10,132 3,415 7,184 — 58 — — 34,966 Special Mention 224 — 22,491 314 — — — — 23,029 Substandard — 26 — — — 10 — — 36 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 444,674 $ 440,616 $ 244,786 $ 58,625 $ 6,693 $ 13,701 $ 22,315 $ 74 $ 1,231,484 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 197,436 $ 506,608 $ 356,360 $ 219,473 $ 136,968 $ 162,766 $ 71,494 $ 437 $ 1,651,542 Pass/Watch — 360 2,415 2,895 1,239 1,902 85 — 8,896 Special Mention — — — 47 1,492 1,607 — 262 3,408 Substandard 685 1,302 15 499 838 2,556 45 — 5,940 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 198,121 $ 508,270 $ 358,790 $ 222,914 $ 140,537 $ 168,831 $ 71,624 $ 699 $ 1,669,786 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 300,574 $ 133,211 $ 15,590 $ — $ — $ — $ 65,385 $ — $ 514,760 Pass/Watch 1,203 — — — — — — — 1,203 Special Mention 1,964 — — — — — 1 — 1,965 Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 303,741 $ 133,211 $ 15,590 $ — $ — $ — $ 65,386 $ — $ 517,928 Current period gross write-offs $ — $ — $ 27 $ — $ — $ — $ — $ — $ 27 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2023 2023 2022 2021 2020 2019 Prior Total Agricultural Pass $ 16,543 $ 35,993 $ 22,472 $ 9,707 $ 3,470 $ 10,056 $ 9,435 $ — $ 107,676 Pass/Watch — 1,756 — — — — — — 1,756 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 16,543 $ 37,749 $ 22,472 $ 9,707 $ 3,470 $ 10,075 $ 9,435 $ — $ 109,451 Current period gross write-offs $ — $ 5 $ 1 $ — $ — $ — $ — $ — $ 6 Consumer Pass $ 6,348 $ 3,173 $ 900 $ 8,056 $ 1,267 $ 81 $ 54,392 $ 90 $ 74,307 Pass/Watch — — 1,917 — — — — — 1,917 Special Mention — — — — — — — — — Substandard — — 1 — — 4 — — 5 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 6,348 $ 3,173 $ 2,818 $ 8,056 $ 1,267 $ 85 $ 54,392 $ 90 $ 76,229 Current period gross write-offs $ 8 $ 9 $ — $ — $ — $ — $ — $ — $ 17 Total loans Pass $ 2,762,560 $ 3,890,686 $ 2,809,753 $ 1,267,844 $ 784,887 $ 1,153,504 $ 1,380,216 $ 6,775 $ 14,056,225 Pass/Watch 43,596 103,921 77,748 36,794 25,698 59,776 5,740 — 353,273 Special Mention 24,997 37,445 56,655 24,053 13,703 17,311 9,053 1,822 185,039 Substandard 13,136 25,422 48,178 5,161 6,317 6,724 7,681 3,386 116,005 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 2,844,289 $ 4,057,474 $ 2,992,334 $ 1,333,852 $ 830,605 $ 1,237,315 $ 1,402,690 $ 11,983 $ 14,710,542 Current period gross write-offs $ 293 $ 14 $ 1,525 $ 5 $ 73 $ 254 $ — $ — $ 2,164

Off-Balance Sheet Arrangement_2

Off-Balance Sheet Arrangements, Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	At March 31, 2024 and December 31, 2023, the approximate amounts of these financial instruments were as follows: March 31, December 31, 2024 2023 Commitments to extend credit $ 3,173,761 $ 3,107,827 Standby letters of credit 28,942 31,627 $ 3,202,703 $ 3,139,454
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, 2024 2023 Balance at beginning of period $ 3,897 $ 3,944 Provision for off-balance sheet credit exposure 184 811 Balance at end of period $ 4,081 $ 4,755

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax expense (benefit) for the three months ended March 31, 2024 and 2023 was as follows: Three Months Ended March 31, 2024 2023 Income tax expense (benefit) for the period $ 6,478 $ (11,284) Effective tax rate 21.2 % 23.1 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2024
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, 2024 and December 31, 2023 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, 2024 Assets: Investment securities available for sale: U.S. treasuries $ 198,549 $ — $ 198,549 $ — Government agency securities 392,411 — 392,411 — Obligations of state and municipal subdivisions 222,486 — 222,486 — Corporate bonds 36,158 — 36,158 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 693,143 — 693,143 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 12,372 — 12,372 — Derivative financial instruments: Interest rate lock commitments 570 — 570 — Forward mortgage-backed securities trades 7 — 7 — Commercial loan interest rate swaps: Loan customer counterparty 44 — 44 — Financial institution counterparty 10,506 — 10,506 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 9,095 — 9,095 — Interest rate lock commitments 1 — 1 — Forward mortgage-backed securities trades 36 — 36 — Commercial loan interest rate swaps: Loan customer counterparty 10,439 — 10,439 — Financial institution counterparty 58 — 58 — December 31, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 214,222 $ — $ 214,222 $ — Government agency securities 396,106 — 396,106 — Obligations of state and municipal subdivisions 227,634 — 227,634 — Corporate bonds 35,820 — 35,820 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 719,469 — 719,469 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 12,016 — 12,016 — Derivative financial instruments: Interest rate lock commitments 507 — 507 — Forward mortgage-backed securities trades 4 — 4 — Commercial loan interest rate swaps: Loan customer counterparty 227 — 227 — Financial institution counterparty 9,472 — 9,472 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 8,256 — 8,256 — Forward mortgage-backed securities trades 43 — 43 — Commercial loan interest rate swaps: Loan customer counterparty 9,403 — 9,403 — Financial institution counterparty 261 — 261 — __________ (1) At March 31, 2024 and December 31, 2023, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $12,205 and $11,747, 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, 2024.
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, 2024 and December 31, 2023, 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, 2024 Assets: Individually evaluated loans $ 4,482 $ — $ — $ 4,482 $ 1,429 December 31, 2023 Assets: Individually evaluated loans $ 5,822 $ — $ — $ 5,822 $ 3,525 Other real estate owned 9,490 — — 9,490 6,052
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, 2024 and December 31, 2023: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant March 31, 2024 Financial assets: Cash and cash equivalents $ 729,998 $ 729,998 $ 729,998 $ — $ — Certificates of deposit held in other banks 248 242 — 242 — Investment securities held to maturity 204,776 166,736 — 166,736 — Loans held for sale, at cost 8,927 9,047 — 9,047 — Loans, net 14,465,456 14,438,025 — — 14,438,025 FHLB of Dallas stock and other restricted stock 11,493 11,493 — 11,493 — Accrued interest receivable 63,438 63,438 — 63,438 — Financial liabilities: Deposits 15,671,715 15,636,153 — 15,636,153 — Accrued interest payable 46,410 46,410 — 46,410 — Other borrowings 496,975 485,475 — 485,475 — Junior subordinated debentures 54,667 66,611 — 66,611 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2023 Financial assets: Cash and cash equivalents $ 721,989 $ 721,989 $ 721,989 $ — $ — Certificates of deposit held in other banks 248 243 — 243 — Investment securities held to maturity 205,232 170,997 — 170,997 — Loans held for sale, at cost 4,404 4,506 — 4,506 — Loans, net 14,558,681 14,547,963 — — 14,547,963 FHLB of Dallas stock and other restricted stock 34,915 34,915 — 34,915 — Accrued interest receivable 64,237 64,237 — 64,237 — Financial liabilities: Deposits 15,723,035 15,697,806 — 15,697,806 — Accrued interest payable 43,653 43,653 — 43,653 — FHLB advances 350,000 350,022 — 350,022 — Other borrowings 271,821 257,975 — 257,975 — Junior subordinated debentures 54,617 68,735 — 68,735 — 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, 2024
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, 2024 and December 31, 2023: Outstanding Notional Balance Asset Derivative Liability Derivative March 31, 2024 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 9,095 Derivatives not designated as hedging instruments: Interest rate lock commitments 23,327 570 1 Forward mortgage-backed securities trades 17,000 7 36 Commercial loan interest rate swaps: Loan customer counterparty 199,102 44 10,439 Financial institution counterparty 199,102 10,506 58 December 31, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 8,256 Derivatives not designated as hedging instruments: Interest rate lock commitments 18,789 507 — Forward mortgage-backed securities trades 15,000 4 43 Commercial loan interest rate swaps: Loan customer counterparty 201,063 227 9,403 Financial institution counterparty 201,063 9,472 261
Income on Derivatives	A summary of derivative activity and the related impact on the consolidated statements of income (loss) for the three months ended March 31, 2024 and 2023 is as follows: Income Statement Location Three Months Ended March 31, 2024 2023 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (1,127) $ (899) Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 62 182 Forward mortgage-backed securities trades Mortgage banking revenue 10 (204)

Stock Awards (Tables)

Stock Awards (Tables)	3 Months Ended
	Mar. 31, 2024
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, 2024 and 2023: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2023 285,340 $ 58.99 Granted during the period 122,252 44.69 Vested during the period (81,772) 64.33 Forfeited during the period (2,072) 50.24 Nonvested shares, March 31, 2024 323,748 $ 52.30 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
Schedule of future vesting of restricted stock award	At March 31, 2024, the future vesting schedule of the nonvested restricted stock awards is as follows: Number of Shares First year 169,390 Second year 98,760 Third year 54,723 Fourth year 875 Total nonvested shares 323,748
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, 2024 and 2023: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2023 178,178 $ 51.55 Granted during the period 37,738 44.69 Forfeited during the period (20,198) 62.58 Nonvested shares, March 31, 2024 195,718 $ 49.09 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

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2024
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, 2024 and December 31, 2023. 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, 2024 Total capital to risk weighted assets: Consolidated $ 1,898,365 11.68 % $ 1,707,015 10.50 % $ 1,625,728 10.00 % Bank 2,030,741 12.49 1,706,577 10.50 1,625,312 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,616,444 9.94 1,381,869 8.50 975,437 6.00 Bank 1,878,820 11.56 1,381,515 8.50 1,300,249 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,560,844 9.60 1,138,010 7.00 N/A N/A Bank 1,878,820 11.56 1,137,718 7.00 1,056,452 6.50 Tier 1 capital to average assets: Consolidated 1,616,444 8.91 725,554 4.00 N/A N/A Bank 1,878,820 10.36 725,364 4.00 906,704 5.00 December 31, 2023 Total capital to risk weighted assets: Consolidated $ 1,885,776 11.57 % $ 1,711,650 10.50 % $ 1,630,143 10.00 % Bank 2,020,376 12.40 1,711,142 10.50 1,629,659 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,617,985 9.93 1,385,621 8.50 978,086 6.00 Bank 1,882,585 11.55 1,385,210 8.50 1,303,727 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,562,385 9.58 1,141,100 7.00 N/A N/A Bank 1,882,585 11.55 1,140,761 7.00 1,059,278 6.50 Tier 1 capital to average assets: Consolidated 1,617,985 8.94 723,633 4.00 N/A N/A Bank 1,882,585 10.41 723,438 4.00 904,298 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, 2024 business_trust segment
Accounting Policies [Abstract]
Number of wholly owned statutory business trusts | business_trust	9
Number of reportable segments | segment	1

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Goodwill Assessment (Details)	3 Months Ended
	Mar. 31, 2024 USD ($)
Accounting Policies [Abstract]
Goodwill, impairment	$ 0

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic earnings per share:
Net income (loss)	$ 24,150	$ (37,510)
Less: Undistributed earnings (loss) allocated to participating securities	24	(206)
Less: Dividends paid on participating securities	45	61
Net income (loss) available to common shareholders	$ 24,081	$ (37,365)
Weighted average basic shares outstanding (shares)	41,205,080	41,063,527
Basic earnings per share (usd per share)	$ 0.58	$ (0.91)
Diluted earnings per share:
Total weighted average diluted shares outstanding (shares)	41,314,378	41,156,949
Diluted earnings per share (usd per share)	$ 0.58	$ (0.91)
Anti-dilutive participating securities (shares)	45,899	58,891
Performance stock units
Diluted earnings per share:
Add dilutive performance stock (shares)	109,298	93,422

Cash Flows - Other Supplemental

Cash Flows - Other Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash transactions:
Interest expense paid	$ 129,417	$ 72,029
Income taxes paid	0	20
Noncash transactions:
Deferred dividend equivalents	43	53
Right-of-use assets obtained in exchange for lease liabilities	2,909	3,556
Loans purchased, not yet settled	$ 7,285	$ 4,987

Securities - Amortized Cost of

Securities - Amortized Cost of Securities and Approximate Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	$ 1,779,140	$ 1,815,702
Gross Unrealized Gain, AFS	40	130
Gross Unrealized Loss, AFS	(235,933)	(222,081)
Fair Value, AFS	1,543,247	1,593,751
Amortized Cost, HTM	204,776	205,232
Fair Value, HTM	166,736
Accrued Interest, AFS	6,381	7,129
Accrued Interest, HTM	868	2,365
U.S. treasuries
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	212,895	228,231
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(14,346)	(14,009)
Fair Value, AFS	198,549	214,222
Government agency securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	467,694	467,754
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(75,283)	(71,648)
Fair Value, AFS	392,411	396,106
Obligations of state and municipal subdivisions
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	233,756	237,146
Gross Unrealized Gain, AFS	36	122
Gross Unrealized Loss, AFS	(11,306)	(9,634)
Fair Value, AFS	222,486	227,634
Amortized Cost, HTM	204,776	205,232
Gross Unrealized Gain, HTM	82	264
Gross Unrealized Loss, HTM	(38,122)	(34,499)
Fair Value, HTM	166,736	170,997
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	(6,842)	(7,180)
Fair Value, AFS	36,158	35,820
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	821,295	839,071
Gross Unrealized Gain, AFS	4	8
Gross Unrealized Loss, AFS	(128,156)	(119,610)
Fair Value, AFS	693,143	719,469
Other securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	500	500
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	0	0
Fair Value, AFS	$ 500	$ 500

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Carrying value of securities pledged	$ 1,048,925,000		$ 950,604,000
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, 2024	Dec. 31, 2023
Amortized Cost, AFS
Due in one year or less	$ 86,451
Due from one year to five years	329,293
Due from five to ten years	396,148
Thereafter	145,953
Total	957,845
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	821,295
Amortized Cost, AFS	1,779,140	$ 1,815,702
Fair Value, AFS
Due in one year or less	85,299
Due from one year to five years	304,189
Due from five to ten years	336,614
Thereafter	124,002
Total	850,104
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	693,143
Fair Value	1,543,247	1,593,751
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	204,776
Total	204,776
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Amortized Cost, HTM	204,776	$ 205,232
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	166,736
Total	166,736
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Fair Value	$ 166,736

Securities Available for Sale -

Securities Available for Sale - Proceeds, Gross Gains and Gross Losses from Sale (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
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) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	$ 38,819	$ 49,588
Less than 12 months: unrealized losses AFS	(488)	(672)
Greater than 12 months: estimated fair value AFS	1,484,207	1,500,978
Greater than 12 months: unrealized losses AFS	(235,445)	(221,409)
Total: estimated fair value AFS	1,523,026	1,550,566
Total: unrealized losses AFS	(235,933)	(222,081)
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	0	0
Less than 12 months: unrealized losses AFS	0	0
Greater than 12 months: estimated fair value AFS	198,549	214,222
Greater than 12 months: unrealized losses AFS	(14,346)	(14,009)
Total: estimated fair value AFS	198,549	214,222
Total: unrealized losses AFS	(14,346)	(14,009)
Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	0	0
Less than 12 months: unrealized losses AFS	0	0
Greater than 12 months: estimated fair value AFS	392,411	396,106
Greater than 12 months: unrealized losses AFS	(75,283)	(71,648)
Total: estimated fair value AFS	392,411	396,106
Total: unrealized losses AFS	(75,283)	(71,648)
Obligations of state and municipal subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	30,135	40,864
Less than 12 months: unrealized losses AFS	(158)	(360)
Greater than 12 months: estimated fair value AFS	176,063	147,529
Greater than 12 months: unrealized losses AFS	(11,148)	(9,274)
Total: estimated fair value AFS	206,198	188,393
Total: unrealized losses AFS	(11,306)	(9,634)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	0	0
Less than 12 months: unrealized losses AFS	0	0
Greater than 12 months: estimated fair value AFS	33,158	32,820
Greater than 12 months: unrealized losses AFS	(6,842)	(7,180)
Total: estimated fair value AFS	33,158	32,820
Total: unrealized losses AFS	(6,842)	(7,180)
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: estimated fair value AFS	8,684	8,724
Less than 12 months: unrealized losses AFS	(330)	(312)
Greater than 12 months: estimated fair value AFS	684,026	710,301
Greater than 12 months: unrealized losses AFS	(127,826)	(119,298)
Total: estimated fair value AFS	692,710	719,025
Total: unrealized losses AFS	$ (128,156)	$ (119,610)

Loans, Net and Allowance for _3

Loans, Net and Allowance for Credit Losses on Loans - Composition of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,613,893	$ 14,710,542
Allowance for credit losses	(148,437)	(151,861)	$ (146,850)	$ (148,787)
Total loans, net	14,465,456	14,558,681
Accrued Interest Receivable	55,293	54,563
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,194,304	2,266,851
Allowance for credit losses	(35,286)	(34,793)	(53,122)	(54,037)
Mortgage warehouse purchase loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	554,616	549,689
Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,356,403	8,289,124
Allowance for credit losses	(65,786)	(60,096)	(59,109)	(61,078)
Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,169,555	1,231,484
Allowance for credit losses	(24,922)	(31,494)	(17,331)	(17,696)
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,690,004	1,669,786
Allowance for credit losses	(7,262)	(6,917)	(4,780)	(3,450)
Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	460,568	517,928
Allowance for credit losses	(14,129)	(17,437)	(11,812)	(11,817)
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	112,070	109,451
Allowance for credit losses	(624)	(745)	(231)	(207)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	76,373	76,229
Allowance for credit losses	$ (428)	$ (379)	$ (465)	$ (502)

Loans, Net and Allowance for _4

Loans, Net and Allowance for Credit Losses on Loans - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	$ 8,221,272,000	$ 8,109,607,000
Commercial Loans	14,465,456,000	14,558,681,000
Allowance for credit losses	148,437,000	151,861,000	$ 146,850,000	$ 148,787,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	35,286,000	34,793,000	53,122,000	54,037,000
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	624,000	745,000	231,000	207,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 428,000	379,000	$ 465,000	$ 502,000
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 | North Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio	35%
Geographic Concentration Risk | Loans and Leases, Net | Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio	27%
Geographic Concentration Risk | Loans and Leases, Net | Houston Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio	25%
Geographic Concentration Risk | Loans and Leases, Net | Central Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio	13%
Energy Related Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	$ 641,328,000	$ 621,883,000
Mortgage warehouse purchase loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Duration of the loans to larger mortgage originators	60 days
Allowance for credit losses	$ 0
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	21%
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		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 151,861	$ 148,787	$ 148,787
Provision for credit losses	(3,384)	(721)
Charge-offs	(68)	(1,244)	(2,164)
Recoveries	28	28
Balance at end of period	148,437	146,850	151,861
Commercial
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	34,793	54,037	54,037
Provision for credit losses	504	(895)
Charge-offs	(39)	(48)	(918)
Recoveries	28	28
Balance at end of period	35,286	53,122	34,793
Real estate | Commercial Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	60,096	61,078	61,078
Provision for credit losses	5,690	(1,969)
Charge-offs	0	0	0
Recoveries	0	0
Balance at end of period	65,786	59,109	60,096
Real estate | Commercial Construction, Land and Land Development
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	31,494	17,696	17,696
Provision for credit losses	(6,572)	831
Charge-offs	0	(1,196)	(1,196)
Recoveries	0	0
Balance at end of period	24,922	17,331	31,494
Real estate | Residential Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,917	3,450	3,450
Provision for credit losses	345	1,330
Charge-offs	0	0	0
Recoveries	0	0
Balance at end of period	7,262	4,780	6,917
Real estate | Single-family interim construction
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	17,437	11,817	11,817
Provision for credit losses	(3,308)	(5)
Charge-offs	0	0	(27)
Recoveries	0	0
Balance at end of period	14,129	11,812	17,437
Agricultural
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	745	207	207
Provision for credit losses	(121)	24
Charge-offs	0	0	(6)
Recoveries	0	0
Balance at end of period	624	231	745
Consumer
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	379	502	502
Provision for credit losses	78	(37)
Charge-offs	(29)	0	(17)
Recoveries	0	0
Balance at end of period	$ 428	$ 465	$ 379

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, 2024	Dec. 31, 2023
Financing Receivable, Impaired [Line Items]
Loan Balance	$ 55,364	$ 47,281
Specific Allocations	16,415	15,248
Commercial
Financing Receivable, Impaired [Line Items]
Loan Balance	27,523	21,534
Specific Allocations	12,971	11,662
Real estate | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Loan Balance	26,922	25,672
Specific Allocations	3,425	3,567
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	0	0
Real estate | Residential Real Estate
Financing Receivable, Impaired [Line Items]
Loan Balance	844	0
Specific Allocations	0	0
Real estate | Single-family interim construction
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	0	0
Agricultural
Financing Receivable, Impaired [Line Items]
Loan Balance	75	75
Specific Allocations	19	19
Consumer
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	$ 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, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, no allowance	$ 1,379,000		$ 14,000
Financing Receivable, Nonaccrual, Interest Income	0	$ 0
Nonperforming Financial Instruments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	55,551,000		50,306,000
Loans past due 90 days and still accruing	707,000		1,494,000
Total nonperforming loans	56,258,000		51,800,000
Nonperforming Financial Instruments | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	24,522,000		21,541,000
Loans past due 90 days and still accruing	17,000		0
Total nonperforming loans	24,539,000		21,541,000
Nonperforming Financial Instruments | Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	27,780,000		26,564,000
Loans past due 90 days and still accruing	0		14,000
Total nonperforming loans	27,780,000		26,578,000
Nonperforming Financial Instruments | Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	9,000		10,000
Loans past due 90 days and still accruing	0		0
Total nonperforming loans	9,000		10,000
Nonperforming Financial Instruments | Real estate | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	3,164,000		2,111,000
Loans past due 90 days and still accruing	687,000		1,480,000
Total nonperforming loans	3,851,000		3,591,000
Nonperforming Financial Instruments | Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0		0
Loans past due 90 days and still accruing	0		0
Total nonperforming loans	0		0
Nonperforming Financial Instruments | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	75,000		75,000
Loans past due 90 days and still accruing	0		0
Total nonperforming loans	75,000		75,000
Nonperforming Financial Instruments | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,000		5,000
Loans past due 90 days and still accruing	3,000		0
Total nonperforming loans	$ 4,000		$ 5,000

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, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans	$ 14,613,893	$ 14,710,542
Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,194,304	2,266,851
Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	554,616	549,689
Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	8,356,403	8,289,124
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,169,555	1,231,484
Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,690,004	1,669,786
Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	460,568	517,928
Agricultural
Financing Receivable, Past Due [Line Items]
Loans	112,070	109,451
Consumer
Financing Receivable, Past Due [Line Items]
Loans	76,373	76,229
Loans 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	29,289	18,315
Loans 30-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	1,979	1,898
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	9,556	5,388
Loans 30-89 Days Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	2,851	2,457
Loans 30-89 Days Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	10,889	7,477
Loans 30-89 Days Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	3,845	828
Loans 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	36	0
Loans 30-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	133	267
Loans 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	24,339	19,676
Loans 90 Days or More Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	7,771	4,883
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	13,883	12,432
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	2,607	2,282
Loans 90 Days or More Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	75	75
Loans 90 Days or More Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	3	4
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Loans	53,628	37,991
Total Past Due Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	9,750	6,781
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	23,439	17,820
Total Past Due Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	2,851	2,457
Total Past Due Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	13,496	9,759
Total Past Due Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	3,845	828
Total Past Due Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	111	75
Total Past Due Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	136	271
Current Loans
Financing Receivable, Past Due [Line Items]
Loans	14,560,265	14,672,551
Current Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,184,554	2,260,070
Current Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	554,616	549,689
Current Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	8,332,964	8,271,304
Current Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,166,704	1,229,027
Current Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,676,508	1,660,027
Current Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	456,723	517,100
Current Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	111,959	109,376
Current Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 76,237	$ 75,958

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		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	$ 961,561		$ 2,844,289
Term Loans by Year of Origination or Renewal, Year 2	2,196,985		4,057,474
Term Loans by Year of Origination or Renewal, Year 3	3,983,764		2,992,334
Term Loans by Year of Origination or Renewal, Year 4	2,880,684		1,333,852
Term Loans by Year of Origination or Renewal, Year 5	1,289,602		830,605
Term Loans by Year of Origination or Renewal, Prior	1,921,049		1,237,315
Revolving Loans	1,377,237		1,402,690
Revolving Loans Converted to Term Loans	3,011		11,983
Total Loans	14,613,893		14,710,542
Current period gross write-offs, Year One	0		293
Current period gross write-offs, Year 2	25		14
Current period gross write-offs, Year 3	0		1,525
Current period gross write-offs, Year 4	0		5
Current period gross write-offs, Year 5	0		73
Current period gross write-offs, Prior	43		254
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	68	$ 1,244	2,164
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	939,921		2,762,560
Term Loans by Year of Origination or Renewal, Year 2	2,091,568		3,890,686
Term Loans by Year of Origination or Renewal, Year 3	3,800,428		2,809,753
Term Loans by Year of Origination or Renewal, Year 4	2,737,033		1,267,844
Term Loans by Year of Origination or Renewal, Year 5	1,223,609		784,887
Term Loans by Year of Origination or Renewal, Prior	1,786,360		1,153,504
Revolving Loans	1,312,886		1,380,216
Revolving Loans Converted to Term Loans	3,011		6,775
Total Loans	13,894,816		14,056,225
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	511		43,596
Term Loans by Year of Origination or Renewal, Year 2	34,329		103,921
Term Loans by Year of Origination or Renewal, Year 3	108,450		77,748
Term Loans by Year of Origination or Renewal, Year 4	65,808		36,794
Term Loans by Year of Origination or Renewal, Year 5	29,361		25,698
Term Loans by Year of Origination or Renewal, Prior	102,137		59,776
Revolving Loans	46,178		5,740
Revolving Loans Converted to Term Loans	0		0
Total Loans	386,774		353,273
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	8,129		24,997
Term Loans by Year of Origination or Renewal, Year 2	63,022		37,445
Term Loans by Year of Origination or Renewal, Year 3	49,050		56,655
Term Loans by Year of Origination or Renewal, Year 4	46,727		24,053
Term Loans by Year of Origination or Renewal, Year 5	31,544		13,703
Term Loans by Year of Origination or Renewal, Prior	19,333		17,311
Revolving Loans	9,248		9,053
Revolving Loans Converted to Term Loans	0		1,822
Total Loans	227,053		185,039
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	13,000		13,136
Term Loans by Year of Origination or Renewal, Year 2	8,066		25,422
Term Loans by Year of Origination or Renewal, Year 3	25,836		48,178
Term Loans by Year of Origination or Renewal, Year 4	31,116		5,161
Term Loans by Year of Origination or Renewal, Year 5	5,088		6,317
Term Loans by Year of Origination or Renewal, Prior	13,219		6,724
Revolving Loans	8,925		7,681
Revolving Loans Converted to Term Loans	0		3,386
Total Loans	105,250		116,005
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	0		0
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	27,413		230,589
Term Loans by Year of Origination or Renewal, Year 2	225,431		228,282
Term Loans by Year of Origination or Renewal, Year 3	219,155		324,880
Term Loans by Year of Origination or Renewal, Year 4	294,064		79,192
Term Loans by Year of Origination or Renewal, Year 5	70,495		104,033
Term Loans by Year of Origination or Renewal, Prior	260,317		173,344
Revolving Loans	1,096,944		1,121,584
Revolving Loans Converted to Term Loans	485		4,947
Total Loans	2,194,304		2,266,851
Current period gross write-offs, Year One	0		285
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		301
Current period gross write-offs, Year 4	0		5
Current period gross write-offs, Year 5	0		73
Current period gross write-offs, Prior	39		254
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	39	48	918
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	14,474		223,287
Term Loans by Year of Origination or Renewal, Year 2	217,557		211,182
Term Loans by Year of Origination or Renewal, Year 3	210,703		281,878
Term Loans by Year of Origination or Renewal, Year 4	252,944		78,695
Term Loans by Year of Origination or Renewal, Year 5	70,046		99,516
Term Loans by Year of Origination or Renewal, Prior	235,202		161,184
Revolving Loans	1,032,847		1,099,241
Revolving Loans Converted to Term Loans	485		347
Total Loans	2,034,258		2,155,330
Commercial | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		168
Term Loans by Year of Origination or Renewal, Year 2	142		9,672
Term Loans by Year of Origination or Renewal, Year 3	635		8,976
Term Loans by Year of Origination or Renewal, Year 4	13,965		121
Term Loans by Year of Origination or Renewal, Year 5	115		2,064
Term Loans by Year of Origination or Renewal, Prior	21,284		9,396
Revolving Loans	46,073		5,655
Revolving Loans Converted to Term Loans	0		0
Total Loans	82,214		36,052
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		185
Term Loans by Year of Origination or Renewal, Year 2	1,316		0
Term Loans by Year of Origination or Renewal, Year 3	547		13,517
Term Loans by Year of Origination or Renewal, Year 4	16,535		85
Term Loans by Year of Origination or Renewal, Year 5	80		0
Term Loans by Year of Origination or Renewal, Prior	160		820
Revolving Loans	9,248		9,052
Revolving Loans Converted to Term Loans	0		1,214
Total Loans	27,886		24,873
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	12,939		6,949
Term Loans by Year of Origination or Renewal, Year 2	6,416		7,428
Term Loans by Year of Origination or Renewal, Year 3	7,270		20,509
Term Loans by Year of Origination or Renewal, Year 4	10,620		291
Term Loans by Year of Origination or Renewal, Year 5	254		2,453
Term Loans by Year of Origination or Renewal, Prior	3,671		1,944
Revolving Loans	8,776		7,636
Revolving Loans Converted to Term Loans	0		3,386
Total Loans	49,946		50,596
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	0		0
Commercial | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	554,616		549,689
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	554,616		549,689
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		0
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0		0
Mortgage warehouse purchase loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	554,616		549,689
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	554,616		549,689
Mortgage warehouse purchase loans | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	212,393		1,094,584
Term Loans by Year of Origination or Renewal, Year 2	1,062,628		2,706,173
Term Loans by Year of Origination or Renewal, Year 3	2,718,006		2,022,998
Term Loans by Year of Origination or Renewal, Year 4	2,016,517		955,358
Term Loans by Year of Origination or Renewal, Year 5	953,019		574,605
Term Loans by Year of Origination or Renewal, Prior	1,338,157		871,279
Revolving Loans	53,191		57,954
Revolving Loans Converted to Term Loans	2,492		6,173
Total Loans	8,356,403		8,289,124
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		0
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0	0	0
Real estate | Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	205,216		1,038,410
Term Loans by Year of Origination or Renewal, Year 2	1,007,577		2,570,061
Term Loans by Year of Origination or Renewal, Year 3	2,557,231		1,913,673
Term Loans by Year of Origination or Renewal, Year 4	1,918,306		900,786
Term Loans by Year of Origination or Renewal, Year 5	893,396		536,973
Term Loans by Year of Origination or Renewal, Prior	1,238,282		805,784
Revolving Loans	53,171		57,954
Revolving Loans Converted to Term Loans	2,492		5,827
Total Loans	7,875,671		7,829,468
Real estate | Commercial Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	511		28,048
Term Loans by Year of Origination or Renewal, Year 2	19,302		82,001
Term Loans by Year of Origination or Renewal, Year 3	97,355		61,025
Term Loans by Year of Origination or Renewal, Year 4	49,112		26,594
Term Loans by Year of Origination or Renewal, Year 5	26,294		22,395
Term Loans by Year of Origination or Renewal, Prior	77,822		48,420
Revolving Loans	20		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	270,416		268,483
Real estate | Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	6,666		22,624
Term Loans by Year of Origination or Renewal, Year 2	35,466		37,445
Term Loans by Year of Origination or Renewal, Year 3	45,532		20,647
Term Loans by Year of Origination or Renewal, Year 4	28,617		23,607
Term Loans by Year of Origination or Renewal, Year 5	28,987		12,211
Term Loans by Year of Origination or Renewal, Prior	16,784		14,884
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		346
Total Loans	162,052		131,764
Real estate | Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		5,502
Term Loans by Year of Origination or Renewal, Year 2	283		16,666
Term Loans by Year of Origination or Renewal, Year 3	17,888		27,653
Term Loans by Year of Origination or Renewal, Year 4	20,482		4,371
Term Loans by Year of Origination or Renewal, Year 5	4,342		3,026
Term Loans by Year of Origination or Renewal, Prior	5,269		2,191
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	48,264		59,409
Real estate | Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	78,799		444,674
Term Loans by Year of Origination or Renewal, Year 2	438,390		440,616
Term Loans by Year of Origination or Renewal, Year 3	399,814		244,786
Term Loans by Year of Origination or Renewal, Year 4	179,574		58,625
Term Loans by Year of Origination or Renewal, Year 5	33,969		6,693
Term Loans by Year of Origination or Renewal, Prior	18,838		13,701
Revolving Loans	20,171		22,315
Revolving Loans Converted to Term Loans	0		74
Total Loans	1,169,555		1,231,484
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		1,196
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0	1,196	1,196
Real estate | Commercial Construction, Land and Land Development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	77,275		430,273
Term Loans by Year of Origination or Renewal, Year 2	399,327		430,458
Term Loans by Year of Origination or Renewal, Year 3	390,805		218,880
Term Loans by Year of Origination or Renewal, Year 4	179,545		51,127
Term Loans by Year of Origination or Renewal, Year 5	31,539		6,693
Term Loans by Year of Origination or Renewal, Prior	18,774		13,633
Revolving Loans	20,171		22,315
Revolving Loans Converted to Term Loans	0		74
Total Loans	1,117,436		1,173,453
Real estate | Commercial Construction, Land and Land Development | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		14,177
Term Loans by Year of Origination or Renewal, Year 2	14,885		10,132
Term Loans by Year of Origination or Renewal, Year 3	8,445		3,415
Term Loans by Year of Origination or Renewal, Year 4	29		7,184
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	55		58
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	23,414		34,966
Real estate | Commercial Construction, Land and Land Development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	1,463		224
Term Loans by Year of Origination or Renewal, Year 2	24,178		0
Term Loans by Year of Origination or Renewal, Year 3	539		22,491
Term Loans by Year of Origination or Renewal, Year 4	0		314
Term Loans by Year of Origination or Renewal, Year 5	2,430		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	28,610		23,029
Real estate | Commercial Construction, Land and Land Development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	61		0
Term Loans by Year of Origination or Renewal, Year 2	0		26
Term Loans by Year of Origination or Renewal, Year 3	25		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	9		10
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	95		36
Real estate | Commercial Construction, Land and Land Development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	25,294		198,121
Term Loans by Year of Origination or Renewal, Year 2	192,805		508,270
Term Loans by Year of Origination or Renewal, Year 3	535,846		358,790
Term Loans by Year of Origination or Renewal, Year 4	354,428		222,914
Term Loans by Year of Origination or Renewal, Year 5	214,910		140,537
Term Loans by Year of Origination or Renewal, Prior	289,357		168,831
Revolving Loans	77,364		71,624
Revolving Loans Converted to Term Loans	0		699
Total Loans	1,690,004		1,669,786
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		0
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0	0	0
Real estate | Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	25,294		197,436
Term Loans by Year of Origination or Renewal, Year 2	191,468		506,608
Term Loans by Year of Origination or Renewal, Year 3	534,836		356,360
Term Loans by Year of Origination or Renewal, Year 4	352,054		219,473
Term Loans by Year of Origination or Renewal, Year 5	211,419		136,968
Term Loans by Year of Origination or Renewal, Prior	279,741		162,766
Revolving Loans	77,131		71,494
Revolving Loans Converted to Term Loans	0		437
Total Loans	1,671,943		1,651,542
Real estate | Residential Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		360
Term Loans by Year of Origination or Renewal, Year 3	357		2,415
Term Loans by Year of Origination or Renewal, Year 4	786		2,895
Term Loans by Year of Origination or Renewal, Year 5	2,952		1,239
Term Loans by Year of Origination or Renewal, Prior	2,976		1,902
Revolving Loans	85		85
Revolving Loans Converted to Term Loans	0		0
Total Loans	7,156		8,896
Real estate | Residential Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	949		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	1,575		47
Term Loans by Year of Origination or Renewal, Year 5	47		1,492
Term Loans by Year of Origination or Renewal, Prior	2,389		1,607
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		262
Total Loans	4,960		3,408
Real estate | Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		685
Term Loans by Year of Origination or Renewal, Year 2	388		1,302
Term Loans by Year of Origination or Renewal, Year 3	653		15
Term Loans by Year of Origination or Renewal, Year 4	13		499
Term Loans by Year of Origination or Renewal, Year 5	492		838
Term Loans by Year of Origination or Renewal, Prior	4,251		2,556
Revolving Loans	148		45
Revolving Loans Converted to Term Loans	0		0
Total Loans	5,945		5,940
Real estate | Residential Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	58,163		303,741
Term Loans by Year of Origination or Renewal, Year 2	256,355		133,211
Term Loans by Year of Origination or Renewal, Year 3	72,432		15,590
Term Loans by Year of Origination or Renewal, Year 4	11,399		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	62,219		65,386
Revolving Loans Converted to Term Loans	0		0
Total Loans	460,568		517,928
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		0
Current period gross write-offs, Year 3	0		27
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0	0	27
Real estate | Single-family interim construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	58,163		300,574
Term Loans by Year of Origination or Renewal, Year 2	254,263		133,211
Term Loans by Year of Origination or Renewal, Year 3	70,000		15,590
Term Loans by Year of Origination or Renewal, Year 4	11,399		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	62,218		65,385
Revolving Loans Converted to Term Loans	0		0
Total Loans	456,043		514,760
Real estate | Single-family interim construction | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		1,203
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	0		1,203
Real estate | Single-family interim construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		1,964
Term Loans by Year of Origination or Renewal, Year 2	1,113		0
Term Loans by Year of Origination or Renewal, Year 3	2,432		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		1
Revolving Loans Converted to Term Loans	0		0
Total Loans	3,545		1,965
Real estate | Single-family interim construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	979		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	1		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	980		0
Real estate | Single-family interim construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	1,892		16,543
Term Loans by Year of Origination or Renewal, Year 2	16,100		37,749
Term Loans by Year of Origination or Renewal, Year 3	36,491		22,472
Term Loans by Year of Origination or Renewal, Year 4	22,142		9,707
Term Loans by Year of Origination or Renewal, Year 5	9,576		3,470
Term Loans by Year of Origination or Renewal, Prior	12,855		10,075
Revolving Loans	12,995		9,435
Revolving Loans Converted to Term Loans	19		0
Total Loans	112,070		109,451
Current period gross write-offs, Year One	0		0
Current period gross write-offs, Year 2	0		5
Current period gross write-offs, Year 3	0		1
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	0		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	0	0	6
Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	1,892		16,543
Term Loans by Year of Origination or Renewal, Year 2	16,100		35,993
Term Loans by Year of Origination or Renewal, Year 3	34,833		22,472
Term Loans by Year of Origination or Renewal, Year 4	22,142		9,707
Term Loans by Year of Origination or Renewal, Year 5	9,576		3,470
Term Loans by Year of Origination or Renewal, Prior	12,836		10,056
Revolving Loans	12,995		9,435
Revolving Loans Converted to Term Loans	19		0
Total Loans	110,393		107,676
Agricultural | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		1,756
Term Loans by Year of Origination or Renewal, Year 3	1,658		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	1,658		1,756
Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	19		19
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	19		19
Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	2,991		6,348
Term Loans by Year of Origination or Renewal, Year 2	5,276		3,173
Term Loans by Year of Origination or Renewal, Year 3	2,020		2,818
Term Loans by Year of Origination or Renewal, Year 4	2,560		8,056
Term Loans by Year of Origination or Renewal, Year 5	7,633		1,267
Term Loans by Year of Origination or Renewal, Prior	1,525		85
Revolving Loans	54,353		54,392
Revolving Loans Converted to Term Loans	15		90
Total Loans	76,373		76,229
Current period gross write-offs, Year One	0		8
Current period gross write-offs, Year 2	25		9
Current period gross write-offs, Year 3	0		0
Current period gross write-offs, Year 4	0		0
Current period gross write-offs, Year 5	0		0
Current period gross write-offs, Prior	4		0
Current period gross write-offs, revolving loans	0		0
Current period gross write-offs, Revolving Loans Converted to Term Loans	0		0
Total write-offs	29	$ 0	17
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	2,991		6,348
Term Loans by Year of Origination or Renewal, Year 2	5,276		3,173
Term Loans by Year of Origination or Renewal, Year 3	2,020		900
Term Loans by Year of Origination or Renewal, Year 4	643		8,056
Term Loans by Year of Origination or Renewal, Year 5	7,633		1,267
Term Loans by Year of Origination or Renewal, Prior	1,525		81
Revolving Loans	54,353		54,392
Revolving Loans Converted to Term Loans	15		90
Total Loans	74,456		74,307
Consumer | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		1,917
Term Loans by Year of Origination or Renewal, Year 4	1,916		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	1,916		1,917
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		1
Term Loans by Year of Origination or Renewal, Year 4	1		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		4
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	1		5
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, 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 or Renewal, Current	0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0
Term Loans by Year of Origination or Renewal, Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total Loans	$ 0		$ 0

Other Borrowings (Details)

Other Borrowings (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) advance	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
FHLB advances	$ 0	$ 350,000
Other borrowings	$ 496,975	$ 271,821
Number Of Short-term Advances From Federal Home Loan Bank | advance	2
Federal Reserve's Bank Term Funding Program
Debt Instrument [Line Items]
Stated interest rate (percent)	5.04%
Borrowings against line of credit	$ 225,000

Off-Balance Sheet Arrangement_3

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 3,202,703	$ 3,139,454
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	3,173,761	3,107,827
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 28,942	$ 31,627

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, 2024	Mar. 31, 2023
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 3,897	$ 3,944
Provision for off-balance sheet credit exposure	184	811
Balance at end of period	$ 4,081	$ 4,755

Off-Balance Sheet Arrangement_5

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 07, 2023	Mar. 31, 2024	Mar. 31, 2023
Loss Contingencies [Line Items]
Litigation settlement		$ 0	$ 102,500
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, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income tax expense (benefit) for the period	$ 6,478	$ (11,284)
Effective tax rate (percent)	21.20%	23.10%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 1,543,247,000	$ 1,593,751,000
Loans held for sale, fair value option	12,372,000	12,016,000
Aggregate principal balance of loans held for sale	12,205,000	11,747,000
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	9,095,000	8,256,000
Designated as Hedging Instrument | Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	9,095,000	8,256,000
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	9,095,000	8,256,000
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	12,372,000	12,016,000
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	12,372,000	12,016,000
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	570,000	507,000
Derivative financial instruments - Liabilities	1,000	0
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	570,000	507,000
Derivative financial instruments - Liabilities	1,000
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
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	570,000	507,000
Derivative financial instruments - Liabilities	1,000
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
Not designated as hedging | Forward mortgage-backed securities trades
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	7,000	4,000
Derivative financial instruments - Liabilities	36,000	43,000
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	7,000	4,000
Derivative financial instruments - Liabilities	36,000	43,000
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	7,000	4,000
Derivative financial instruments - Liabilities	36,000	43,000
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	44,000	227,000
Derivative financial instruments - Liabilities	10,439,000	9,403,000
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	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	44,000	227,000
Derivative financial instruments - Liabilities	10,439,000	9,403,000
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	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	10,506,000	9,472,000
Derivative financial instruments - Liabilities	58,000	261,000
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	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	10,506,000	9,472,000
Derivative financial instruments - Liabilities	58,000	261,000
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	0
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	198,549,000	214,222,000
U.S. treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	198,549,000	214,222,000
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	198,549,000	214,222,000
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	392,411,000	396,106,000
Government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	392,411,000	396,106,000
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	392,411,000	396,106,000
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	222,486,000	227,634,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	222,486,000	227,634,000
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	222,486,000	227,634,000
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	36,158,000	35,820,000
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	36,158,000	35,820,000
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	36,158,000	35,820,000
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	693,143,000	719,469,000
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	693,143,000	719,469,000
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	693,143,000	719,469,000
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	500,000	500,000
Other securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	500,000	500,000
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	500,000	500,000
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
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 55,364		$ 47,281
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	4,482		5,822
Other real estate owned			9,490
Fair Value, Measurements, Nonrecurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	1,429	$ 3,525
Fair Value, Measurements, Nonrecurring | Other real estate owned
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses		$ 6,052
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0		0
Other real estate owned			0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0		0
Other real estate owned			0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 4,482		5,822
Other real estate owned			$ 9,490

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	Mar. 31, 2024 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, 2024	Dec. 31, 2023
Financial assets:
Investment securities held to maturity	$ 166,736
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,202,703	$ 3,139,454
Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,173,761	3,107,827
Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	28,942	31,627
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	729,998	721,989
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
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	242	243
Investment securities held to maturity	166,736	170,997
Loans held for sale, at cost	9,047	4,506
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	11,493	34,915
Accrued interest receivable	63,438	64,237
Financial liabilities:
Deposits	15,636,153	15,697,806
Accrued interest payable	46,410	43,653
FHLB advances		350,022
Other borrowings	485,475	257,975
Junior subordinated debentures	66,611	68,735
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	14,438,025	14,547,963
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
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	729,998	721,989
Certificates of deposit held in other banks	248	248
Investment securities held to maturity	204,776	205,232
Loans held for sale, at cost	8,927	4,404
Loans, net	14,465,456	14,558,681
FHLB of Dallas stock and other restricted stock	11,493	34,915
Accrued interest receivable	63,438	64,237
Financial liabilities:
Deposits	15,671,715	15,723,035
Accrued interest payable	46,410	43,653
FHLB advances		350,000
Other borrowings	496,975	271,821
Junior subordinated debentures	54,667	54,617
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	729,998	721,989
Certificates of deposit held in other banks	242	243
Investment securities held to maturity	166,736	170,997
Loans held for sale, at cost	9,047	4,506
Loans, net	14,438,025	14,547,963
FHLB of Dallas stock and other restricted stock	11,493	34,915
Accrued interest receivable	63,438	64,237
Financial liabilities:
Deposits	15,636,153	15,697,806
Accrued interest payable	46,410	43,653
FHLB advances		350,022
Other borrowings	485,475	257,975
Junior subordinated debentures	66,611	68,735
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, 2024 USD ($) derivative	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) derivative
Derivative [Line Items]
Number of interest rate derivatives instruments entered into | derivative	2
Unrealized (losses) gains arising during the period, net of tax	$ (1,553,000)	$ 743,000
Reclassification of amount of losses recognized into income, net of tax	886,000	$ 706,000
Cash collateral pledged for derivatives	10,515,000		$ 10,242,000
Securities collateral pledged for derivatives	433,000		444,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	2,400,000
Interest rate swaps - cash flow hedge | Loan customer counterparty
Derivative [Line Items]
Credit exposure limited to the net favorable value of all swaps	$ 10,550,000		$ 9,699,000
Risk Participation Agreements Participant Bank
Derivative [Line Items]
Number of risk participation agreements	1		1
Credit risk participation	$ 1,481,000		$ 1,481,000
Risk Participation Agreements Lead Bank
Derivative [Line Items]
Number of risk participation agreements | derivative	1		1
Credit risk participation	$ 8,734,000		$ 8,805,000
Designated as Hedging Instrument | Interest rate swaps - cash flow hedge
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	$ 3,934,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Balances and Fair Values of Outstanding Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Designated as Hedging Instrument | Interest rate swaps - cash flow hedge
Derivative [Line Items]
Outstanding Notional Balance	$ 100,000	$ 100,000
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	9,095	8,256
Not designated as hedging | Interest rate swaps - cash flow hedge | Commercial Loan | Loan customer counterparty
Derivative [Line Items]
Outstanding Notional Balance	199,102	201,063
Asset Derivative Fair Value	44	227
Liability Derivative Fair Value	10,439	9,403
Not designated as hedging | Interest rate swaps - cash flow hedge | Commercial Loan | Financial institution counterparty
Derivative [Line Items]
Outstanding Notional Balance	199,102	201,063
Asset Derivative Fair Value	10,506	9,472
Liability Derivative Fair Value	58	261
Not designated as hedging | Interest rate lock commitments
Derivative [Line Items]
Outstanding Notional Balance	23,327	18,789
Asset Derivative Fair Value	570	507
Liability Derivative Fair Value	1	0
Not designated as hedging | Forward mortgage-backed securities trades
Derivative [Line Items]
Outstanding Notional Balance	17,000	15,000
Asset Derivative Fair Value	7	4
Liability Derivative Fair Value	$ 36	$ 43

Derivative Financial Instrume_5

Derivative Financial Instruments - Income (Loss) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest rate swaps - cash flow hedge | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, gain (loss)	$ (1,127)	$ (899)
Interest rate lock commitments | Not designated as hedging
Derivative [Line Items]
Derivative, gain (loss)	62	182
Forward mortgage-backed securities trades | Not designated as hedging
Derivative [Line Items]
Derivative, gain (loss)	$ 10	$ (204)

Stock Awards - Additional Infor

Stock Awards - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	May 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 2,118	$ 1,959
Estimated future compensation expense		$ 14,107
Period for recognition		2 years 2 months 4 days
Fair value of common stock awards vested		$ 3,786	5,605
Stock based compensation expense		$ 2,606	$ 2,445
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)		122,252	119,767
Excess tax expense (benefits) on vested restricted stock		$ 313	$ 85
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)		37,738	37,938
Period for recognition		2 years 2 months 12 days
Stock based compensation expense		$ 488	$ 486
Unrecognized compensation expense		$ 3,871
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)		1,272,010
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		4 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, 2024	Mar. 31, 2023
Number of Shares
Nonvested shares, beginning balance (shares)	285,340	309,015
Granted during the period (shares)	122,252	119,767
Vested during the period (shares)	(81,772)	(92,830)
Forfeited during the period (shares)	(2,072)	(1,763)
Nonvested shares, ending balance (shares)	323,748	334,189
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 58.99	$ 60.12
Granted during the period (usd per share)	44.69	60.21
Vested during the period (usd per share)	64.33	64.55
Forfeited during the period (usd per share)	50.24	63.23
Nonvested shares, ending balance (usd per share)	$ 52.30	$ 58.91

Stock Awards - Future Vesting S

Stock Awards - Future Vesting Schedule of Nonvested Shares (Details)	Mar. 31, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	323,748
First year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	169,390
Second year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	98,760
Third year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	54,723
Fourth year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	875

Stock Awards - Schedule of Nonv

Stock Awards - Schedule of Nonvested Restricted Stock Awards (Details) - Performance stock units - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Number of Shares
Nonvested shares, beginning balance (shares)	178,178	140,240
Granted during the period (shares)	37,738	37,938
Forfeited during the period (shares)	(20,198)
Nonvested shares, ending balance (shares)	195,718	178,178
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 51.55	$ 49.20
Granted during the period (usd per share)	44.69	60.21
Forfeited during the period (usd per share)	62.58
Nonvested shares, ending balance (usd per share)	$ 49.09	$ 51.55

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Consolidated
Total capital to risk weighted assets:
Actual Amount	$ 1,898,365	$ 1,885,776
Actual Ratio (percent)	0.1168	0.1157
Minimum capital required plus capital conservation buffer amount	$ 1,707,015	$ 1,711,650
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,625,728	$ 1,630,143
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,616,444	$ 1,617,985
Actual Ratio (percent)	0.0994	0.0993
Minimum capital required plus capital conservation buffer amount	$ 1,381,869	$ 1,385,621
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 975,437	$ 978,086
Required to be considered well capitalized (percent)	0.0600	0.0600
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,560,844	$ 1,562,385
Actual ratio (percent)	0.0960	0.0958
Minimum capital required plus capital conservation buffer amount	$ 1,138,010	$ 1,141,100
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Tier 1 capital to average assets:
Actual Amount	$ 1,616,444	$ 1,617,985
Actual Ratio (percent)	0.0891	0.0894
Minimum capital required plus capital conservation buffer amount	$ 725,554	$ 723,633
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Bank
Total capital to risk weighted assets:
Actual Amount	$ 2,030,741	$ 2,020,376
Actual Ratio (percent)	0.1249	0.1240
Minimum capital required plus capital conservation buffer amount	$ 1,706,577	$ 1,711,142
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,625,312	$ 1,629,659
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,878,820	$ 1,882,585
Actual Ratio (percent)	0.1156	0.1155
Minimum capital required plus capital conservation buffer amount	$ 1,381,515	$ 1,385,210
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 1,300,249	$ 1,303,727
Required to be considered well capitalized (percent)	0.0800	0.0800
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,878,820	$ 1,882,585
Actual ratio (percent)	0.1156	0.1155
Minimum capital required plus capital conservation buffer amount	$ 1,137,718	$ 1,140,761
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Required to be considered well capitalized amount	$ 1,056,452	$ 1,059,278
Required to be considered well capitalized (percent)	0.0650	0.0650
Tier 1 capital to average assets:
Actual Amount	$ 1,878,820	$ 1,882,585
Actual Ratio (percent)	0.1036	0.1041
Minimum capital required plus capital conservation buffer amount	$ 725,364	$ 723,438
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Required to be considered well capitalized amount	$ 906,704	$ 904,298
Required to be considered well capitalized (percent)	0.0500	0.0500

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Regulatory Assets [Line Items]
Common stock purchased to settle employee tax withholding related to vesting of stock awards (shares)	24,354	26,777
Common stock purchased to settle employee tax withholding related to vesting of stock awards	$ 1,129	$ 1,617
2023 Share Repurchase Program
Regulatory Assets [Line Items]
Common stock repurchased (shares)		0

Subsequent Event (Details)

Subsequent Event (Details)	Apr. 18, 2024 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.38