Independent Bank (IBTX) 10-Q 24 Oct 23 2023 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2023	Oct. 20, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-35854
Entity Registrant Name	Independent Bank Group, Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	13-4219346
Entity Address, Address Line One	7777 Henneman Way
Entity Address, City or Town	McKinney,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75070-1711
City Area Code	972
Local Phone Number	562-9004
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	IBTX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,283,178
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001564618
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 92,921	$ 134,183
Interest-bearing deposits in other banks	618,788	520,139
Cash and cash equivalents	711,709	654,322
Certificates of deposit held in other banks	248	496
Securities available for sale, at fair value	1,545,904	1,691,784
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively	205,689	207,059
Loans held for sale (includes $10,499 and $10,612 carried at fair value, respectively)	18,068	11,310
Loans, net of allowance for credit losses of $148,249 and $148,787, respectively	14,075,155	13,760,576
Premises and equipment, net	355,533	355,368
Other real estate owned	22,505	23,900
Federal Home Loan Bank (FHLB) of Dallas stock and other restricted stock	25,496	23,436
Bank-owned life insurance (BOLI)	243,980	240,448
Deferred tax asset	106,658	78,669
Goodwill	994,021	994,021
Other intangible assets, net	53,666	62,999
Other assets	161,240	154,026
Total assets	18,519,872	18,258,414
Deposits:
Noninterest-bearing	3,703,784	4,736,830
Interest-bearing	11,637,185	10,384,587
Total deposits	15,340,969	15,121,417
FHLB advances	275,000	300,000
Other borrowings	271,666	267,066
Junior subordinated debentures	54,568	54,419
Other liabilities	245,571	130,129
Total liabilities	16,187,774	15,873,031
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,284,003 and 41,190,677 shares outstanding, respectively)	413	412
Additional paid-in capital	1,964,764	1,959,193
Retained earnings	617,673	638,354
Accumulated other comprehensive loss	(250,752)	(212,576)
Total stockholders’ equity	2,332,098	2,385,383
Total liabilities and stockholders’ equity	$ 18,519,872	$ 18,258,414

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for credit losses, securities held to maturity	$ 0	$ 0
Loans held for sale, fair value option	10,499,000	10,612,000
Allowance for credit losses, loans	$ 148,249,000	$ 148,787,000
Preferred stock, shares outstanding (shares)	0	0
Common stock, shares outstanding (shares)	41,284,003	41,190,677

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Interest and fees on loans	$ 202,725	$ 160,160	$ 580,631	$ 427,765
Interest on taxable securities	7,674	8,306	23,323	24,908
Interest on nontaxable securities	2,558	2,655	7,747	7,729
Interest on interest-bearing deposits and other	9,787	2,566	27,513	4,846
Total interest income	222,744	173,687	639,214	465,248
Interest expense:
Interest on deposits	102,600	21,586	243,005	35,306
Interest on FHLB advances	6,054	443	29,903	786
Interest on other borrowings	3,808	3,635	12,248	10,986
Interest on junior subordinated debentures	1,233	749	3,480	1,749
Total interest expense	113,695	26,413	288,636	48,827
Net interest income	109,049	147,274	350,578	416,421
Provision for credit losses	340	3,100	650	1,657
Net interest income after provision for credit losses	108,709	144,174	349,928	414,764
Noninterest income:
Service charges on deposit accounts	3,568	3,194	10,436	8,996
Investment management fees	2,470	2,156	7,215	6,998
Mortgage banking revenue	1,774	2,179	5,646	7,695
Mortgage warehouse purchase program fees	555	596	1,414	2,285
Loss on sale of loans	(7)	0	(14)	(1,501)
(Loss) gain on sale and disposal of premises and equipment	(56)	(101)	345	(310)
Increase in cash surrender value of BOLI	1,465	1,350	4,252	3,987
Other	3,877	4,103	11,201	12,089
Total noninterest income	13,646	13,477	40,495	40,239
Noninterest expense:
Salaries and employee benefits	43,618	54,152	136,833	154,837
Occupancy	12,408	11,493	35,607	31,526
Communications and technology	6,916	6,545	21,202	18,276
FDIC assessment	3,653	1,749	10,171	4,831
Advertising and public relations	587	424	2,195	1,583
Other real estate owned (income) expenses, net	(253)	133	(482)	199
Impairment of other real estate	0	0	2,200	0
Amortization of other intangible assets	3,111	3,117	9,333	9,380
Litigation settlement	0	0	102,500	0
Professional fees	1,262	3,457	6,112	10,990
Other	10,032	10,663	30,748	28,493
Total noninterest expense	81,334	91,733	356,419	260,115
Income before taxes	41,021	65,918	34,004	194,888
Income tax expense	8,246	13,481	5,662	39,351
Net income	$ 32,775	$ 52,437	$ 28,342	$ 155,537
Basic earnings per share (usd per share)	$ 0.79	$ 1.27	$ 0.69	$ 3.71
Diluted earnings per share (usd per share)	$ 0.79	$ 1.27	$ 0.69	$ 3.71

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 32,775	$ 52,437	$ 28,342	$ 155,537
Other comprehensive loss before tax:
Unrealized losses arising during the period, excluding the change attributable to available for sale securities reclassified to held to maturity	(47,756)	(58,857)	(47,994)	(267,832)
Tax effect	(10,029)	(12,360)	(10,079)	(56,245)
Unrealized losses arising during the period, net of tax, excluding the change attributable to available for sale securities reclassified to held to maturity	(37,727)	(46,497)	(37,915)	(211,587)
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities	(5)	(6)	(15)	(16)
Tax effect	(1)	(1)	(3)	(3)
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities, net of tax	(4)	(5)	(12)	(13)
Change in unrealized losses on securities, net of tax	(37,731)	(46,502)	(37,927)	(211,600)
Unrealized holding losses arising during the period	(1,720)	(4,068)	(3,347)	(11,088)
Tax effect	(361)	(854)	(703)	(2,328)
Unrealized losses arising during the period, net of tax	(1,359)	(3,214)	(2,644)	(8,760)
Reclassification of amount of losses recognized into income	1,113	321	3,032	78
Tax effect	234	67	637	16
Reclassification of amount of losses recognized into income, net of tax	879	254	2,395	62
Change in unrealized losses on derivative financial instruments	(480)	(2,960)	(249)	(8,698)
Other comprehensive loss, net of tax	(38,211)	(49,462)	(38,176)	(220,298)
Comprehensive (loss) income	$ (5,436)	$ 2,975	$ (9,834)	$ (64,761)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock $0.01 Par	Common Stock $0.01 Par Value	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2021	$ 2,576,650	$ 0	$ 428	$ 1,945,497	$ 625,484	$ 5,241
Beginning balance (shares) at Dec. 31, 2021			42,756,234
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	155,537				155,537
Other comprehensive income (loss), net of tax	(220,298)					(220,298)
Common stock repurchased (shares)			(1,695,022)
Common stock repurchased	(119,165)		$ (17)		(119,148)
Restricted stock forfeited (shares)			(7,301)
Restricted stock forfeited	0
Restricted stock granted (shares)			111,095
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	9,600			9,600
Cash dividends ($0.38 and $1.14 per share for the three and nine months ended September 30, 2023 and $0.38 and $1.14 per share for the three and nine months ended September 30, 2022)	(47,984)				(47,984)
Ending balance at Sep. 30, 2022	2,354,340	0	$ 412	1,955,096	613,889	(215,057)
Ending balance (shares) at Sep. 30, 2022			41,165,006
Beginning balance at Jun. 30, 2022	2,364,335	0	$ 412	1,951,317	578,201	(165,595)
Beginning balance (shares) at Jun. 30, 2022			41,156,261
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	52,437				52,437
Other comprehensive income (loss), net of tax	(49,462)					(49,462)
Common stock repurchased (shares)			(15,311)
Common stock repurchased	(1,054)				(1,054)
Restricted stock forfeited (shares)			(2,755)
Restricted stock forfeited	0
Restricted stock granted (shares)			26,811
Restricted stock granted	0
Stock based compensation expense	3,779			3,779
Cash dividends ($0.38 and $1.14 per share for the three and nine months ended September 30, 2023 and $0.38 and $1.14 per share for the three and nine months ended September 30, 2022)	(15,695)				(15,695)
Ending balance at Sep. 30, 2022	2,354,340	0	$ 412	1,955,096	613,889	(215,057)
Ending balance (shares) at Sep. 30, 2022			41,165,006
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	28,342				28,342
Other comprehensive income (loss), net of tax	(38,176)					(38,176)
Common stock repurchased (shares)			(38,739)
Common stock repurchased	(2,057)				(2,057)
Restricted stock forfeited (shares)			(4,844)
Restricted stock forfeited	0
Restricted stock granted (shares)			136,909
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	5,572			5,572
Cash dividends ($0.38 and $1.14 per share for the three and nine months ended September 30, 2023 and $0.38 and $1.14 per share for the three and nine months ended September 30, 2022)	(46,966)				(46,966)
Ending balance at Sep. 30, 2023	2,332,098	0	$ 413	1,964,764	617,673	(250,752)
Ending balance (shares) at Sep. 30, 2023			41,284,003
Beginning balance at Jun. 30, 2023	2,353,042	0	$ 413	1,964,341	600,829	(212,541)
Beginning balance (shares) at Jun. 30, 2023			41,279,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	32,775				32,775
Other comprehensive income (loss), net of tax	(38,211)					(38,211)
Common stock repurchased (shares)			(11,476)
Common stock repurchased	(418)				(418)
Restricted stock forfeited (shares)			(1,123)
Restricted stock forfeited	0
Restricted stock granted (shares)			17,142
Restricted stock granted	0
Stock based compensation expense	423			423
Cash dividends ($0.38 and $1.14 per share for the three and nine months ended September 30, 2023 and $0.38 and $1.14 per share for the three and nine months ended September 30, 2022)	(15,513)				(15,513)
Ending balance at Sep. 30, 2023	$ 2,332,098	$ 0	$ 413	$ 1,964,764	$ 617,673	$ (250,752)
Ending balance (shares) at Sep. 30, 2023			41,284,003

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Preferred stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock shares authorized (shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000
Common stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (shares)	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000
Dividends paid (usd per share)	$ 0.38	$ 0.38	$ 1.14	$ 1.14

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 28,342	$ 155,537
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	13,629	10,674
Accretion income recognized on loans	(3,013)	(8,825)
Amortization of other intangibles assets	9,333	9,380
Amortization of premium on securities, net	5,512	5,467
Amortization of discount and origination costs on borrowings	999	670
Stock based compensation expense	5,572	9,600
Excess tax expense (benefit) on restricted stock vested	216	(673)
FHLB stock dividends	(2,296)	(125)
(Gain) loss on sale and disposal of premises and equipment	(345)	310
Loss on sale of loans	14	1,501
Impairment of other real estate	2,200	0
Impairment of other assets	955	1,156
Deferred tax (benefit) expense	(17,841)	2,720
Provision for credit losses	650	1,657
Increase in cash surrender value of BOLI	(4,252)	(3,987)
Excess benefit claim on BOLI	(522)	(784)
Net gain on mortgage loans held for sale	(3,725)	(3,480)
Originations of loans held for sale	(208,360)	(237,105)
Proceeds from sale of loans held for sale	205,327	250,736
Net change in other assets	(682)	(19,050)
Net change in other liabilities	88,839	(26,751)
Net cash provided by operating activities	120,552	148,628
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns, AFS	102,747	7,167,979
Purchases AFS	(9,018)	(7,281,181)
Purchases HTM	0	(91,065)
Proceeds from maturities of certificates of deposit held in other banks	248	2,501
Proceeds from benefit claim of BOLI	1,242	1,344
Purchases of FHLB stock and other restricted stock	(79,084)	(830)
Proceeds from redemptions of FHLB stock and other restricted stock	79,320	3,167
Proceeds from sale of loans	4,188	19,333
Net loans originated held for investment	(166,699)	(1,669,267)
Originations of mortgage warehouse purchase loans	(8,510,472)	(11,284,831)
Proceeds from pay-offs of mortgage warehouse purchase loans	8,380,269	11,664,635
Additions to premises and equipment	(15,812)	(45,969)
Proceeds from sale of premises and equipment	681	174
Net cash used in investing activities	(212,390)	(1,514,010)
Cash flows from financing activities:
Net decrease in demand deposits, money market and savings accounts	(2,284,130)	(608,272)
Net increase in time deposits	2,503,682	15,372
Proceeds from FHLB advances	12,595,000	275,000
Repayments of FHLB advances	(12,620,000)	(225,000)
Proceeds from other borrowings	100,000	111,000
Repayments of other borrowings	(96,250)	(128,000)
Repurchase of common stock	(2,057)	(119,165)
Dividends paid	(47,020)	(47,838)
Net cash provided by (used in) financing activities	149,225	(726,903)
Net change in cash and cash equivalents	57,387	(2,092,285)
Cash and cash equivalents at beginning of period	654,322	2,608,444
Cash and cash equivalents at end of period	$ 711,709	$ 516,159

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Nature of operations: Independent Bank Group, Inc. (IBG) through its subsidiary, Independent Bank, a Texas state banking corporation, doing business as Independent Financial, (Bank) (collectively known as the Company), provides a full range of banking services to individual and corporate customers in the North, Central and Southeast Texas areas and along the Colorado Front Range, through its various branch locations in those areas. The Company is engaged in traditional community banking activities, which include commercial and retail lending, deposit gathering, and investment and liquidity management activities. The Company’s primary deposit products are demand deposits, money market accounts and certificates of deposit and its primary lending products are commercial business and real estate, real estate mortgage and consumer loans. Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation. The consolidated interim financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company's Annual Report on Form 10-K for the year ended December 31, 2022. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the 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 nine months ended September 30, 2023, the economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering indicator requiring an interim goodwill impairment quantitative analysis for second quarter 2023. Based on an analysis performed, the Company's estimated fair value to a market participant as of June 30, 2023, exceeded its carrying amount resulting in no impairment charge for the period. During the third quarter 2023, management evaluated current conditions and concluded there have been no significant changes in the economic environment or future projections and therefore, believes that there has been no further decline in the Company's fair value as of September 30, 2023. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes. Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the SEC and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 13. Subsequent Events . Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the three and nine months ended September 30, 2023 and 2022. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price. The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Basic earnings per share: Net income $ 32,775 $ 52,437 $ 28,342 $ 155,537 Less: Undistributed earnings (loss) allocated to participating securities 31 277 (43) 843 Dividends paid on participating securities 29 118 110 374 Net income available to common shareholders $ 32,715 $ 52,042 $ 28,275 $ 154,320 Weighted average basic shares outstanding 41,209,088 40,856,786 41,166,274 41,557,304 Basic earnings per share $ 0.79 $ 1.27 $ 0.69 $ 3.71 Diluted earnings per share: Net income available to common shareholders $ 32,715 $ 52,042 $ 28,275 $ 154,320 Total weighted average basic shares outstanding 41,209,088 40,856,786 41,166,274 41,557,304 Add dilutive performance stock units 96,070 86,404 91,025 80,521 Total weighted average diluted shares outstanding 41,305,158 40,943,190 41,257,299 41,637,825 Diluted earnings per share $ 0.79 $ 1.27 $ 0.69 $ 3.71 Anti-dilutive participating securities 18,639 100,019 36,484 125,664

Cash Flows

Cash Flows	9 Months Ended
	Sep. 30, 2023
Supplemental Cash Flow Elements [Abstract]
Statement of Cash Flows	Note 2. Statement of Cash Flows As allowed by the accounting standards, the Company has chosen to report, on a net basis, its cash receipts and cash payments for time deposits accepted and repayments of those deposits, and loans made to customers and principal collections on those loans. The Company uses the indirect method to present cash flows from operating activities. Other supplemental cash flow information is presented below: Nine Months Ended September 30, 2023 2022 Cash transactions: Interest expense paid $ 263,694 $ 50,154 Income taxes paid $ 18,781 $ 33,638 Noncash transactions: Deferred dividend equivalents $ (54) $ 146 Transfer of loans to other real estate owned $ — $ 23,900 Transfer of securities available for sale to held to maturity $ — $ 117,583 Right-of-use assets obtained in exchange for lease liabilities $ 6,625 $ 4,011 Loans purchased, not yet settled $ 19,095 $ 5,898 Transfer of bank premises to other real estate $ 805 $ —

Securities

Securities	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Securities	Note 3. Securities Securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost of securities and their approximate fair values at September 30, 2023 and December 31, 2022 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale September 30, 2023 U.S. treasuries $ 236,068 $ — $ (19,600) $ 216,468 Government agency securities 467,813 — (93,721) 374,092 Obligations of state and municipal subdivisions 246,890 17 (22,205) 224,702 Corporate bonds 43,000 — (7,563) 35,437 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 858,269 — (163,564) 694,705 Other securities 500 — — 500 $ 1,852,540 $ 17 $ (306,653) $ 1,545,904 December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 Securities Held to Maturity September 30, 2023 Obligations of state and municipal subdivisions $ 205,689 $ — $ (57,188) $ 148,501 December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $6,610 and $7,702 on available for sale and $915 and $2,697 on held to maturity securities at September 30, 2023 and December 31, 2022, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. During 2022, the Company reclassified, at fair value, approximately $117,583 in available for sale obligations of state and municipal subdivisions to the held to maturity category, primarily to limit future volatility in equity due to potential increases in interest rates. The related net unrealized pre-tax gains of approximately $26 remained in accumulated other comprehensive income (loss) and will be amortized over the remaining life of the securities, as an adjustment of the yield on the transferred securities. There have been no transfers of securities in 2023. The amortized cost and estimated fair value of securities at September 30, 2023, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2023 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 79,113 $ 77,754 $ — $ — Due from one year to five years 322,219 294,567 — — Due from five to ten years 440,774 358,011 — — Thereafter 152,165 120,867 205,689 148,501 994,271 851,199 205,689 148,501 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 858,269 694,705 — — $ 1,852,540 $ 1,545,904 $ 205,689 $ 148,501 ____________ (1) Excludes accrued interest receivable of $6,610 on available for sale and $915 on held to maturity securities at September 30, 2023, that is recorded in other assets on the accompanying consolidated balance sheets. Securities with a fair value of approximately $863,921 and $1,168,006 at September 30, 2023 and December 31, 2022, respectively, were pledged primarily to secure deposits. There were no sales of securities during the three and nine months ended September 30, 2023 and 2022. The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of September 30, 2023 and December 31, 2022, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale September 30, 2023 U.S. treasuries — $ — $ — 33 $ 216,468 $ (19,600) $ 216,468 $ (19,600) Government agency securities — — — 74 374,092 (93,721) 374,092 (93,721) Obligations of state and municipal subdivisions 116 75,008 (2,689) 236 147,528 (19,516) 222,536 (22,205) Corporate bonds — — — 11 32,437 (7,563) 32,437 (7,563) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 4 8,602 (910) 348 686,103 (162,654) 694,705 (163,564) 120 $ 83,610 $ (3,599) 702 $ 1,456,628 $ (303,054) $ 1,540,238 $ (306,653) December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) Securities Held to Maturity September 30, 2023 Obligations of state and municipal subdivisions 1 $ 6,687 $ (365) 42 $ 141,814 $ (56,823) $ 148,501 $ (57,188) December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820) The Company's securities classified as available for sale and held to maturity are evaluated for expected credit losses by applying the appropriate expected credit losses methodology in accordance with ASC Topic 326, "Financial Instruments - Credit Losses." At September 30, 2023 , management's review of all securities at an unrealized loss position determined that the losses resulted from factors not related to credit quality. This conclusion is based on management's analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors for each security type in our portfolio. The unrealized losses on available for sale securities are generally due to increases in market interest rates. Furthermore, the Company has the intent to hold the available for sale securities until maturity or a forecasted recovery, and it is more likely than not that the Company will not have to sell the securities before the recovery of their cost basis. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. As such, there is no allowance for credit losses on available for sale securities recognized as of September 30, 2023 . The Company's held to maturity securities include taxable and tax-exempt municipal securities issued primarily by school districts, utility districts and municipalities. With regard to securities issued by state and municipal subdivisions, management considers issuer bond ratings, historical loss rates for given bond ratings, whether issuers continue to make timely principal and interest payments under the contractual terms of the securities, internal forecasts and whether or not such securities are guaranteed. A significant portion of the Company's held to maturity securities are guaranteed or insured. Furthermore, as of September 30, 2023 , there were no past due principal or interest payments associated with these securities. As such, no allowance for credit losses has been recorded on held to maturity securities as of September 30, 2023 .

Loans, Net and Allowance for Cr

Loans, Net and Allowance for Credit Losses on Loans	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Loans, Net and Allowance for Loan Losses	Note 4. Loans, Net and Allowance for Credit Losses on Loans Loans, net, at September 30, 2023 and December 31, 2022, consisted of the following: September 30, December 31, 2023 2022 Commercial $ 2,208,032 $ 2,240,959 Mortgage warehouse purchase loans 442,302 312,099 Real estate: Commercial 8,088,783 7,817,447 Commercial construction, land and land development 1,156,877 1,231,071 Residential 1,634,896 1,592,859 Single-family interim construction 491,051 508,839 Agricultural 121,883 124,422 Consumer 79,580 81,667 Total loans (1) 14,223,404 13,909,363 Allowance for credit losses (148,249) (148,787) Total loans, net (1) $ 14,075,155 $ 13,760,576 ____________ (1) Excludes accrued interest receivable of $50,835 and $48,815 at September 30, 2023 and December 31, 2022, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. Loans with carrying amounts of $7,990,175 and $7,246,087 at September 30, 2023 and December 31, 2022, respectively, were pledged to secure Federal Home Loan Bank borrowing capacity and Federal Reserve Bank discount window borrowing capacity. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and potential problem loans. Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. The Company’s management examines current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. These cash flows, however, may not be as expected and the value of collateral securing the loans may fluctuate. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. The commercial loan portfolio includes loans made to customers in the energy industry, which is a complex, technical and cyclical industry. Experienced bankers with specialized energy lending experience originate our energy loans. Companies in this industry produce, extract, develop, exploit and explore for oil and natural gas. Loans are primarily collateralized with proven producing oil and gas reserves based on a technical evaluation of these reserves. At September 30, 2023 and December 31, 2022, there were approximately $613,887 and $574,698, 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. 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 September 30, 2023, the portfolio consisted of approximately 22% 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 September 30, 2023, loans in the Colorado region represented about 27% of the total portfolio. A large percentage of the Company’s portfolio consists of commercial and residential real estate loans. As of September 30, 2023 and December 31, 2022, there were no concentrations of loans related to a single industry in excess of 10% of total loans. Under ASC 326, the allowance for credit losses is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged-off against the allowance when they are deemed uncollectible. Recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The amount of the allowance represents management's best estimate of current expected credit losses on loans considering available information relevant to assessing collectibility over the loans' contractual terms, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation that a restructuring will be executed with an individual borrower, or the extension or renewal options are included in the borrower contract and are not unconditionally cancellable by the Company. The Company's allowance balance is estimated using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term as well as for changes in environmental conditions, such as changes in unemployment rates, gross domestic product, property values, 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. Substantially all of the Company’s individually evaluated loans are measured at the fair value of the collateral. Management continually evaluates the allowance for credit losses based upon the factors noted above. Should any of the factors considered by management change, the Company’s estimate of credit losses could also change and would affect the level of future provision for credit losses. Portions of the allowance may be allocated for specific credits; however, the entire allowance is available for any credit that, in management’s judgment, should be charged-off. While the calculation of the allowance for credit losses utilizes management’s best judgment and all the information available, the adequacy of the allowance for credit losses is dependent on a variety of factors beyond the Company’s control, including, among other things, the performance of the entire loan portfolio, the economy, changes in interest rates and the view of regulatory authorities towards loan classifications. Loans requiring an individual evaluation are generally identified at the servicing officer level based on review of weekly past due reports and/or the loan officer’s communication with borrowers. In addition, the status of past due loans are routinely discussed within each lending region as well as credit committee meetings to determine if classification is warranted. The Company’s internal loan review department has implemented an internal risk-based loan review process to identify potential internally classified loans that supplements the independent external loan review. 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. Following unprecedented declines caused by the pandemic and volatile energy prices, the Texas economy, specifically in the Company’s lending areas of north, central and southeast Texas, continued to expand at a modest pace through the third quarter of 2023, while the Colorado economy remained stable. Solid growth was seen in the nonfinancial services sector, while retail sales were flat and activity in the manufacturing, energy and financial services sectors declined. Housing demand was mixed and agricultural conditions depressed. Consumer spending continued to expand at a moderate pace, with robust leisure travel offset somewhat by tepid retail sales growth. The U.S. banking system is strong and resilient. Tighter credit conditions for households and businesses are likely to weigh on economic activity, hiring and inflation. Outlooks were fairly stable, though uncertainty persists around continuing impact of higher interest rates. The implications for the U.S. economy are highly uncertain, and the war in Ukraine and related events as well as the unprecedented attacks in Israel by Palestinian militant group Hamas have created additional upward pressure on inflation and are weighing on economic activity and may have far-reaching impacts on energy and food markets, global trade and geopolitical relationships. Inflation remains elevated, reflecting supply and demand imbalances, higher food and energy prices and broader price pressures. The risk of loss associated with all segments of the portfolio could increase due to these factors. The economy and other risk factors are minimized by the Company’s underwriting standards, which include the following principles: 1) financial strength of the borrower including strong earnings, high net worth, significant liquidity and acceptable debt to worth ratio, 2) managerial business competence, 3) ability to repay, 4) loan to value, 5) projected cash flow and 6) guarantor financial statements, as applicable. During the second quarter 2023, the Company updated and performed a recalibration of its credit loss models to enhance model performance reliability. The overall impact of the model changes as described below mainly resulted in reclassifications of provision expense between the loan pools. While the fundamental modeling methodologies remain unchanged, the updates included (1) consolidation of the energy loans into the commercial and industrial risk pool as a result of similarities in risk characteristics observed in recent history, (2) correlation of the loss rate model to new peer group loss history data which resulted in changes to certain loan pool macroeconomic variables (MEVs) further diversifying the variables used in the model, (3) changes to the qualitative factor model to address the volatility of past dues and risk grades by incorporating a four quarter rolling average to the assessed risk level, and (4) adjustment to the unfunded commitments utilization model to bifurcate the single-family residential and commercial construction portfolio loan pools into various sub pools to better correlate their utilization rates. The following is a summary of the activity in the allowance for credit losses on loans by class for the three and nine months ended September 30, 2023 and 2022: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended September 30, 2023 Balance at beginning of period $ 34,581 $ 54,079 $ 33,462 $ 6,047 $ 18,333 $ 830 $ 472 $ 147,804 Provision for credit losses (491) 6,544 (3,704) 180 (1,578) (11) (58) 882 Charge-offs (525) — — — — (6) — (531) Recoveries 69 — 20 — — 5 — 94 Balance at end of period $ 33,634 $ 60,623 $ 29,778 $ 6,227 $ 16,755 $ 818 $ 414 $ 148,249 Nine months ended September 30, 2023 Balance at beginning of period $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ 148,787 Provision for credit losses (20,731) (455) 13,167 2,777 4,938 612 (79) 229 Charge-offs (593) — (1,196) — — (6) (9) (1,804) Recoveries 921 — 111 — — 5 — 1,037 Balance at end of period $ 33,634 $ 60,623 $ 29,778 $ 6,227 $ 16,755 $ 818 $ 414 $ 148,249 Three months ended September 30, 2022 Balance at beginning of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ 144,170 Provision for credit losses (2,307) 6,565 (1,921) (329) 1,471 37 4 3,520 Charge-offs (273) (1,187) — — — — — (1,460) Recoveries 84 — — 81 — — — 165 Balance at end of period $ 50,807 $ 59,224 $ 22,265 $ 2,866 $ 10,696 $ 142 $ 395 $ 146,395 Nine months ended September 30, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ 148,706 Provision for credit losses 1,345 (1,727) (1,596) 599 3,474 36 (63) 2,068 Charge-offs (726) (4,159) — (6) — — (10) (4,901) Recoveries 441 — — 81 — — — 522 Balance at end of period $ 50,807 $ 59,224 $ 22,265 $ 2,866 $ 10,696 $ 142 $ 395 $ 146,395 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 September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 20,638 $ 11,845 $ 21,981 $ 8,378 Commercial real estate 12,419 1,325 12,303 1,209 Commercial construction, land and land development — — — — Residential real estate — — — — Single-family interim construction 189 60 189 43 Agricultural — — — — Consumer — — — — $ 33,246 $ 13,230 $ 34,473 $ 9,630 Nonperforming loans by loan class at September 30, 2023 and December 31, 2022 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total September 30, 2023 Nonaccrual loans (1) $ 21,197 $ 13,361 $ 11 $ 1,573 $ 189 $ — $ 6 $ 36,337 Loans past due 90 days and still accruing 252 396 1,120 320 — — — 2,088 Total nonperforming loans (2) $ 21,449 $ 13,757 $ 1,131 $ 1,893 $ 189 $ — $ 6 $ 38,425 December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 Total nonperforming loans $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 ____________ (1) There are $22 and $125 in loans on nonaccrual without an allowance for credit loss as of September 30, 2023 and December 31, 2022, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three and nine months ended September 30, 2023 and 2022. (2) With the adoption of ASU 2022-02, effective January 1, 2023, TDR accounting has been eliminated. The accrual of interest is discontinued on a loan when management believes that, after considering collection efforts and other factors, the borrower's financial condition is such that collection of interest is doubtful, as well as when required by regulatory provisions. Regulatory provisions would typically require the placement of a loan on non-accrual status if 1) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or 2) full payment of principal and interest is not expected. All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. Cash collections on nonaccrual loans are generally credited to the loan receivable balance, and no interest income is recognized on those loans until the principal balance has been collected. Loans are generally returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Occasionally, the Company modifies loans to borrowers in financial distress by providing certain concessions, such as principal forgiveness, term extension, an other-than-insignificant payment delay, an interest rate reduction, or a combination of such concessions. When principal forgiveness is provided, the amount of forgiveness is charged-off against the allowance for credit losses. Upon the Company's determination that a modified loan (or portion of a loan) has subsequently been deemed uncollectible, the loan (or portion of the loan) is written off. During the three and nine months ended September 30, 2023, the Company did not provide any modifications under these circumstances to borrowers experiencing financial difficulty. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents information regarding the aging of past due loans by loan class as of September 30, 2023 and as of December 31, 2022: Loans Loans Total Past Current Total September 30, 2023 Commercial $ 543 $ 5,330 $ 5,873 $ 2,202,159 $ 2,208,032 Mortgage warehouse purchase loans — — — 442,302 442,302 Commercial real estate 12,278 12,815 25,093 8,063,690 8,088,783 Commercial construction, land and land development 294 1,120 1,414 1,155,463 1,156,877 Residential real estate 1,235 645 1,880 1,633,016 1,634,896 Single-family interim construction 919 189 1,108 489,943 491,051 Agricultural 37 — 37 121,846 121,883 Consumer 116 4 120 79,460 79,580 $ 15,422 $ 20,103 $ 35,525 $ 14,187,879 $ 14,223,404 December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363 The Company’s internal classified report is segregated into the following categories: 1) Pass/Watch, 2) Special Mention, 3) Substandard, 4) Doubtful and 5) Loss. The loans placed in the Pass/Watch category reflect the Company’s opinion that the loans reflect potential weakness that requires monitoring on a more frequent basis. The loans in the Special Mention category reflect the Company’s opinion that the credit contains weaknesses which represent a greater degree of risk and warrant extra attention. These loans are reviewed monthly by officers and senior management to determine if a change in category is warranted. The loans placed in the Substandard category are considered to be potentially inadequately protected by the current debt service capacity of the borrower and/or the pledged collateral. These credits, even if apparently protected by collateral value, have shown weakness related to adverse financial, managerial, economic, market or political conditions, which may jeopardize repayment of principal and interest and may be considered impaired. There is a possibility that some future loss could be sustained by the Company if such weakness is not corrected. The Doubtful category includes loans that are in default or principal exposure is probable and the possibility of loss is extremely high. The Loss category includes loans that are considered uncollectible, with little chance of turnaround. Management considers the guidance in ASC 310-20 when determining whether a modification, extension or renewal of a loan constitutes a current period origination. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of September 30, 2023 and December 31, 2022: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 165,982 $ 239,581 $ 306,149 $ 91,368 $ 103,445 $ 168,927 $ 1,011,202 $ 654 $ 2,087,308 Pass/Watch 193 8,562 10,223 129 95 9,485 15,943 — 44,630 Special Mention 206 — 14,417 89 3,032 207 5,885 1,151 24,987 Substandard 7,501 7,934 20,885 326 2,753 1,018 7,074 3,616 51,107 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 173,882 $ 256,077 $ 351,674 $ 91,912 $ 109,325 $ 179,637 $ 1,040,104 $ 5,421 $ 2,208,032 Current period gross write-offs $ 285 $ — $ 272 $ 5 $ 4 $ 27 $ — $ — $ 593 Mortgage warehouse purchase loans Pass $ 442,302 $ — $ — $ — $ — $ — $ — $ — $ 442,302 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 442,302 $ — $ — $ — $ — $ — $ — $ — $ 442,302 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Commercial real estate Pass $ 670,557 $ 2,606,179 $ 1,933,507 $ 928,564 $ 556,398 $ 858,411 $ 67,205 $ 4,239 $ 7,625,060 Pass/Watch 16,468 65,784 55,831 44,754 20,893 59,370 1 — 263,101 Special Mention 10,664 33,000 21,079 4,333 12,508 6,916 — 351 88,851 Substandard 12,778 28,727 54,656 4,798 3,698 7,114 — — 111,771 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 710,467 $ 2,733,690 $ 2,065,073 $ 982,449 $ 593,497 $ 931,811 $ 67,206 $ 4,590 $ 8,088,783 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial construction, land and land development Pass $ 297,204 $ 447,008 $ 244,936 $ 72,496 $ 7,031 $ 15,607 $ 13,329 $ 75 $ 1,097,686 Pass/Watch 11,294 14,018 34 7,151 — 61 1 — 32,559 Special Mention 4,853 — 21,278 464 — — — — 26,595 Substandard — 26 — — — 11 — — 37 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 313,351 $ 461,052 $ 266,248 $ 80,111 $ 7,031 $ 15,679 $ 13,330 $ 75 $ 1,156,877 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 133,726 $ 509,169 $ 367,164 $ 222,789 $ 141,320 $ 180,665 $ 64,676 $ 236 $ 1,619,745 Pass/Watch — 363 840 2,919 1,690 1,936 85 — 7,833 Special Mention — — — — 1,075 1,028 — 265 2,368 Substandard 472 675 18 506 216 3,015 48 — 4,950 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 134,198 $ 510,207 $ 368,022 $ 226,214 $ 144,301 $ 186,644 $ 64,809 $ 501 $ 1,634,896 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 215,748 $ 188,763 $ 25,203 $ — $ — $ — $ 57,693 $ — $ 487,407 Pass/Watch 2,535 919 — — — — 1 — 3,455 Special Mention — — — — — — — — — Substandard — — 189 — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 218,283 $ 189,682 $ 25,392 $ — $ — $ — $ 57,694 $ — $ 491,051 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Agricultural Pass $ 14,127 $ 46,282 $ 22,843 $ 11,776 $ 3,529 $ 11,730 $ 9,302 $ — $ 119,589 Pass/Watch — 2,275 — — — — — — 2,275 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 14,127 $ 48,557 $ 22,843 $ 11,776 $ 3,529 $ 11,749 $ 9,302 $ — $ 121,883 Current period gross write-offs $ — $ 5 $ 1 $ — $ — $ — $ — $ — $ 6 Consumer Pass $ 5,416 $ 4,082 $ 1,623 $ 8,313 $ 1,320 $ 175 $ 56,323 $ 99 $ 77,351 Pass/Watch — 306 1,917 — — — — — 2,223 Special Mention — — — — — — — — — Substandard — — 2 — — 4 — — 6 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 5,416 $ 4,388 $ 3,542 $ 8,313 $ 1,320 $ 179 $ 56,323 $ 99 $ 79,580 Current period gross write-offs $ — $ 9 $ — $ — $ — $ — $ — $ — $ 9 Total loans Pass $ 1,945,062 $ 4,041,064 $ 2,901,425 $ 1,335,306 $ 813,043 $ 1,235,515 $ 1,279,730 $ 5,303 $ 13,556,448 Pass/Watch 30,490 92,227 68,845 54,953 22,678 70,852 16,031 — 356,076 Special Mention 15,723 33,000 56,774 4,886 16,615 8,151 5,885 1,767 142,801 Substandard 20,751 37,362 75,750 5,630 6,667 11,181 7,122 3,616 168,079 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 2,012,026 $ 4,203,653 $ 3,102,794 $ 1,400,775 $ 859,003 $ 1,325,699 $ 1,308,768 $ 10,686 $ 14,223,404 Current period gross write-offs $ 285 $ 14 $ 1,469 $ 5 $ 4 $ 27 $ — $ — $ 1,804 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 3

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2023
Advance from Federal Home Loan Bank [Abstract]
Federal Home Loan Bank Advances	Note 5. Federal Home Loan Bank Advances At September 30, 2023, the Company has advances from the FHLB of Dallas under note payable arrangements that mature in October 2023. Interest payments on these notes are made monthly. The weighted average interest rate of all notes was 5.49% and 2.42% at September 30, 2023 and December 31, 2022, respectively. The balances outstanding on these advances were $275,000 and $300,000 at September 30, 2023 and December 31, 2022, respectively. The advances are secured by $21,973 of FHLB stock owned by the Company and a blanket lien on certain loans along with specific listed loans for an aggregate available carrying value of $6,654,177 at September 30, 2023. The Company had remaining credit available under the FHLB advance program of $4,924,806 at September 30, 2023. At September 30, 2023, the Company had $1,443,300 in undisbursed advance commitments (letters of credit) with the FHLB. As of September 30, 2023, these commitments mature on various dates from October 2023 through July 2025. The FHLB letters of credit were obtained in lieu of pledging securities to secure public fund deposits that are over the FDIC insurance limit. At September 30, 2023, there were no disbursements against the advance commitments.

Other Borrowings

Other Borrowings	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Other Borrowings	Note 6. Other Borrowings Other borrowings totaled $271,666 and $267,066 at September 30, 2023 and December 31, 2022, respectively. On March 31, 2023, the Company redeemed $30,000 of its outstanding 5.00% fixed-to-floating rate subordinated debentures due December 31, 2027. There were $33,750 borrowings outstanding as of September 30, 2023 and no borrowings outstanding as of December 31, 2022 against the Company's revolving line of credit.

Off-Balance Sheet Arrangements,

Off-Balance Sheet Arrangements, Commitments and Contingencies	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Arrangements, Commitments and Contingencies	Note 7. Off-Balance Sheet Arrangements, Commitments and Contingencies Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. The commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the balance sheet. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of this instrument. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. At September 30, 2023 and December 31, 2022, the approximate amounts of these financial instruments were as follows: September 30, December 31, 2023 2022 Commitments to extend credit $ 2,917,204 $ 3,291,409 Standby letters of credit 29,046 24,135 $ 2,946,250 $ 3,315,544 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained if deemed necessary by the Company upon extension of credit is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, farm crops, property, plant and equipment and income-producing commercial properties. Letters of credit are written conditional commitments used by the Company to guarantee the performance of a customer to a third party. The Company’s policies generally require that letter of credit arrangements contain security and debt covenants similar to those contained in loan arrangements. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount shown in the table above. If the commitment is funded, the Company would be entitled to seek recovery from the customer. Allowance For Credit Losses on Off-Balance Sheet Credit Exposures The allowance for credit losses on off-balance-sheet credit exposures is calculated under ASC 326, representing expected credit losses over the contractual period for which the Company is exposed to credit risk resulting from a contractual obligation to extend credit. Off-balance sheet credit exposures primarily consist of amounts available under outstanding lines of credit and letters of credit detailed in the table above. The allowance for credit losses on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date using the same methodologies as portfolio loans, taking into consideration the likelihood that funding will occur based on historical utilization rates. The allowance is included in other liabilities on the Company’s consolidated balance sheets. The allowance for credit lo sses on off-balance sheet commitments was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Balance at beginning of period $ 4,907 $ 4,731 $ 3,944 $ 4,722 Provision for off-balance sheet credit exposure (542) (420) 421 (411) Balance at end of period $ 4,365 $ 4,311 $ 4,365 $ 4,311 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, which is expected to be paid in fourth quarter 2023 or first quarter 2024, is recognized as litigation settlement expense on the accompanying income statement as well as $2,500 in legal and other fees associated with the litigation and settlement. In addition, the Company is involved in other legal actions arising from normal business activities. Management believes that the outcome of such proceedings will not materially affect the financial position, results of operations or cash flows of the Company.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Note 8. Income Taxes Income tax expense for the three and nine months ended September 30, 2023 and 2022 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Income tax expense for the period $ 8,246 $ 13,481 $ 5,662 $ 39,351 Effective tax rate 20.1 % 20.5 % 16.7 % 20.2 % The effective tax rates for 2023 and 2022 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 nine months ended September 30, 2023 is lower due to the litigation settlement that occurred in first quarter 2023.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 9. Fair Value Measurements The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures , establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. See below and Note 10. Derivative Financial Instruments , for additional information. Assets and Liabilities Measured on a Recurring Basis The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of September 30, 2023 and December 31, 2022 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant September 30, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 216,468 $ — $ 216,468 $ — Government agency securities 374,092 — 374,092 — Obligations of state and municipal subdivisions 224,702 — 224,702 — Corporate bonds 35,437 — 35,437 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 694,705 — 694,705 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 10,499 — 10,499 — Derivative financial instruments: Interest rate lock commitments 353 — 353 — Forward mortgage-backed securities trades 71 — 71 — Financial institution counterparty 14,331 — 14,331 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,583 — 11,583 — Forward mortgage-backed securities trades 13 — 13 — Loan customer counterparty 14,176 — 14,176 — December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — __________ (1) At September 30, 2023 and December 31, 2022, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $10,272 and $10,330, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at September 30, 2023. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted to credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of interest rate lock commitments is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 10, Derivative Financial Instruments , for more information. Assets and Liabilities Measured on a Nonrecurring Basis In accordance with ASC Topic 820, certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at September 30, 2023 and December 31, 2022, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended September 30, 2023 Assets: Individually evaluated loans $ 5,359 $ — $ — $ 5,359 $ 3,552 Other real estate owned 22,505 — — 22,505 3,037 December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548 Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. In addition, mortgage loans held for sale not recorded under the fair value option are required to be measured at the lower of cost or fair value. The fair value of these loans is based upon binding quotes or bids from third party investors. As of September 30, 2023 and December 31, 2022, all mortgage loans held for sale not recorded under the fair value option were recorded at cost. Fair Value of Financial Instruments not Recorded at Fair Value The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at September 30, 2023 and December 31, 2022: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant September 30, 2023 Financial assets: Cash and cash equivalents $ 711,709 $ 711,709 $ 711,709 $ — $ — Certificates of deposit held in other banks 248 241 — 241 — Investment securities held to maturity 205,689 148,501 — 148,501 — Loans held for sale, at cost 7,569 7,734 — 7,734 — Loans, net 14,075,155 13,824,742 — — 13,824,742 FHLB of Dallas stock and other restricted stock 25,496 25,496 — 25,496 — Accrued interest receivable 58,780 58,780 — 58,780 — Financial liabilities: Deposits 15,340,969 15,296,064 — 15,296,064 — Accrued interest payable 34,546 34,546 — 34,546 — FHLB advances 275,000 275,014 — 275,014 — Other borrowings 271,666 253,625 — 253,625 — Junior subordinated debentures 54,568 58,789 — 58,789 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures are based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 10. Derivative Financial Instruments The Company accounts for its derivative financial instruments in accordance with ASC Topic 815 which requires all derivative instruments to be carried at fair value on the balance sheet. The Company has designated certain derivative instruments used to manage interest rate risk as hedge relationships with certain assets, liabilities or cash flows being hedged. Certain derivatives used for interest rate risk management are not designated in a hedge relationship and are used for asset and liability management related to the Company's mortgage banking activities and commercial customers' financing needs. All derivatives are carried at fair value in either other assets or other liabilities. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. The Company formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions at the inception of the hedge relationship. This documentation includes linking the fair value for cash flow hedges to the specific assets and liabilities on the balance sheet or the specific firm commitments or forecasted transaction. The Company assesses, both at the hedge's inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Company discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. The Company's objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of fixed-rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. The Company has two interest rate swap derivatives with an aggregated notional amount of $100,000 that were designated as cash flow hedges. The derivatives are intended to hedge the variable cash flows associated with certain existing variable-interest rate loans and were determined to be effective during the three and nine months ended September 30, 2023. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period that the hedged transaction affects earnings. Amounts of losses recognized in accumulated other comprehensive income related to derivatives was $1,359 and $2,644, 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 $879 and $2,395, net of tax, during and for the three and nine months ended September 30, 2023, respectively. Amounts of losses recognized in accumulated other comprehensive income related to derivatives was $3,214 and $8,760, 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 $254 and $62, net of tax, during and for the three and nine months ended September 30, 2022, respectively. During the next twelve months, the Company estimates that $4,320 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 September 30, 2023 and December 31, 2022: Outstanding Notional Balance Asset Derivative Liability Derivative September 30, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,583 Derivatives not designated as hedging instruments: Interest rate lock commitments 20,111 353 — Forward mortgage-backed securities trades 21,000 71 13 Commercial loan interest rate swaps: Loan customer counterparty 202,915 — 14,176 Financial institution counterparty 202,915 14,331 — December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 — The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate September 30, 2023 December 31, 2022 Received Paid Received Paid Loan customer counterparty 4.53 % 7.86 % 4.12 % 6.72 % The credit exposure related to interest rate swaps is limited to the net favorable value of all swaps by each counterparty, which was approximately $14,331 and $13,968 at September 30, 2023 and December 31, 2022, respectively. In some cases, collateral may be required from the counterparties involved if the net value of the derivative instruments exceeds a nominal amount. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values. At September 30, 2023 and December 31, 2022, cash of $11,462 and $10,394, respectively, and securities of $449 and $509, respectively, were pledged as collateral for these derivatives, respectively, and counterparties had deposited $3,550 of cash with the Company as of September 30, 2023. The Company has entered into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans in which the Company is either a participant or a lead bank. Risk participation agreements entered into as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution. The Company is party to one risk participation agreement as a participant bank having a notional amount of $1,481 at September 30, 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 $8,877 at September 30, 2023. The changes in the fair value of interest rate lock commitments and the forward sales of mortgage-backed securities are recorded in mortgage banking revenue. These gains and losses were not attributable to instrument-specific credit risk. For commercial interest rate swaps, because the Company acts as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on the results of operations. A summary of derivative activity and the related impact on the consolidated statements of income for the three and nine months ended September 30, 2023 and 2022 is as follows: Income Statement Location Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (1,119) $ (326) $ (3,048) $ (93) Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 5 (544) 65 (957) Forward mortgage-backed securities trades Mortgage banking revenue (33) 470 (29) 458

Stock Awards

Stock Awards	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock Awards	Note 11. Stock Awards The Company grants common stock awards to certain employees of the Company. In May 2022, the shareholders of the Company approved the 2022 Equity Incentive Plan (2022 Plan). Under this plan, the Compensation Committee may grant awards to certain employees of the Company in the form of restricted stock, restricted stock units, stock appreciation rights, qualified and nonqualified stock options, performance share awards and other equity-based awards. Effective with the adoption of the 2022 Plan, no further awards will be granted under the prior 2013 Equity Incentive Plan (2013 Plan). Awards outstanding under the 2013 Plan will remain in effect under the prior plan according to their respective terms and any terminated 2013 Plan awards will be available for awards under the 2022 Plan in accordance with the 2022 Plan's provisions. The 2022 Plan has 1,500,000 reserved shares of common stock to be awarded by the Company’s Compensation Committee. As of September 30, 2023, there were 1,365,752 shares remaining available for grant for future awards. Shares issued under these plans are restricted stock awards and performance stock units at target award level. Restricted stock awarded to employees generally vest evenly over the required employment period and range from one three Restricted Stock Awards The following table summarizes the activity in nonvested restricted stock awards for the nine months ended September 30, 2023 and 2022: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2022 309,015 $ 60.12 Granted during the period 136,909 56.99 Vested during the period (144,677) 58.64 Forfeited during the period (4,844) 62.81 Nonvested shares, September 30, 2023 296,403 $ 59.36 Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 111,095 72.55 Vested during the period (161,936) 53.83 Forfeited during the period (7,301) 55.06 Nonvested shares, September 30, 2022 305,409 $ 59.79 Compensation expense related to these awards is recorded based on the fair value of the award at the date of grant and totaled $2,112 and $6,176 for the three and nine months ended September 30, 2023, respectively, and $2,610 and $7,178 for the three and nine months ended September 30, 2022, respectively. Compensation expense is recorded in salaries and employee benefits in the accompanying consolidated statements of income. At September 30, 2023, future compensation expense is estimated to be $12,982 and will be recognized over a remaining weighted average period of 2.06 years. The fair value of common stock awards that vested during the nine months ended September 30, 2023 and 2022 was $7,497 and $11,822, respectively. The Company has recorded $120 and $216 in excess tax expense on vested restricted stock to income tax expense for the three and nine months ended September 30, 2023, respectively, and $321 and $673 in excess tax benefit for the three and nine months ended September 30, 2022, respectively. There were no modifications of stock agreements during the nine months ended September 30, 2023 and 2022 that resulted in significant additional incremental compensation costs. At September 30, 2023, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 151,166 Second year 80,278 Third year 56,411 Fourth year 8,548 Total nonvested shares 296,403 Performance Stock Units Performance stock units represent shares potentially issuable in the future. The number of shares issued is based upon the measure of the Company's achievement of its relative adjusted return on average tangible common equity, as defined by the Company, over the award's performance period as compared to an identified peer group's achievement over the same performance period. The number of shares issuable under each performance award is the product of the award target and the award payout percentage for the given level of achievement which ranges from 0% to 150% of the target. The following table summarizes the activity in nonvested performance stock units at target award level for the nine months ended September 30, 2023 and 2022: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2022 140,240 $ 49.20 Granted during the period 37,938 60.21 Nonvested shares, September 30, 2023 178,178 $ 51.55 Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, September 30, 2022 135,240 $ 48.53 Compensation expense related to performance stock units is estimated each period based on the fair value of the target stock unit at the grant date and the most probable level of achievement of the performance condition, adjusted for the passage of time within the vesting periods of the awards. Compensation expense related to these awards was $(1,689) and $(604) for the three and nine months ended September 30, 2023, respectively, and $1,169 and $2,422 for the three and nine months ended September 30, 2022, respectively. As of September 30, 2023, the unrecognized compensation expense is estimated to be $3,160. The remaining performance period over which the expense will be recognized is 2.06 years.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2023
Regulated Operations [Abstract]
Regulatory Matters	Note 12. Regulatory Matters Under banking law, there are legal restrictions limiting the amount of dividends the Bank can declare. Approval of the regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. For state banks, subject to regulatory capital requirements, payment of dividends is generally allowed to the extent of net profits. The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Tier 2 capital for the Company includes permissible portions of the Company's subordinated notes. The permissible portion of qualified subordinated notes decreases 20% per year during the final five years of the term of the notes. The Company is subject to the Basel III regulatory capital framework (the Basel III Capital Rules). The Basel III Capital Rules require that the Company maintain a 2.5% capital conservation buffer above the minimum risk-based capital adequacy requirements. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure to meet the full amount of the buffer will result in restrictions on the Company's ability to make capital distributions, including dividend payments and stock repurchases and to pay discretionary bonuses to executive officers. In February 2019, the federal bank regulatory agencies issued a final rule that revised certain capital regulations under ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and included a transition option that allows banking organizations to phase in, over a three year period, the day one adverse effects of adoption on their regulatory capital ratios (three year transition option). In connection with the adoption of ASC 326 on January 1, 2021, the Company recognized an after-tax cumulative effect reduction to retained earnings. The Company elected to adopt the three year transition option and the deferral has been applied in capital ratios presented below. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, Common Equity Tier 1 (CET1) and Tier 1 capital (as defined in the regulations) to risk weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of September 30, 2023 and December 31, 2022, the Company and the Bank meet all capital adequacy requirements to which they are subject, including the capital buffer requirement. As of September 30, 2023 and December 31, 2022, the Bank’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” the Bank must maintain minimum total risk based, CET1, Tier 1 risk based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events that management believes have changed the Bank’s category. The following table presents actual and required capital ratios under Basel III Capital Rules for the Company and Bank as of September 30, 2023 and December 31, 2022. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio September 30, 2023 Total capital to risk weighted assets: Consolidated $ 1,879,020 11.89 % $ 1,659,872 10.50 % $ 1,580,830 10.00 % Bank 2,011,879 12.73 1,659,341 10.50 1,580,324 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,614,462 10.21 1,343,706 8.50 948,498 6.00 Bank 1,877,321 11.88 1,343,276 8.50 1,264,259 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,862 9.86 1,106,581 7.00 N/A N/A Bank 1,877,321 11.88 1,106,227 7.00 1,027,211 6.50 Tier 1 capital to average assets: Consolidated 1,614,462 9.09 710,397 4.00 N/A N/A Bank 1,877,321 10.57 710,202 4.00 887,753 5.00 December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum. Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In January 2023, the Company's Board established the 2023 Stock Repurchase Plan (2023 Plan), which provided for the repurchase of up to $125,000 of common stock through December 31, 2023. There were no shares repurchased under the 2023 Plan during the three and nine months ended September 30, 2023. Under the prior plan, the Company repurchased 1,651,236 shares at a total cost of $115,966 during the nine months ended September 30, 2022. There were no shares repurchased during the three months ended September 30, 2022. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board. Company stock repurchased to settle employee tax withholding related to vesting of stock awards totaled 11,476 and 38,739 shares at a total cost of $418 and $2,057 for the three and nine months ended September 30, 2023, respectively, and 15,311 and 43,786 shares at a total cost of $1,054 and $3,199 for the three and nine months ended September 30, 2022, respectively, and were not included under the repurchase program.

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Event	Note 13. Subsequent Events Declaration of Dividends On October 19, 2023, the Company declared a quarterly cash dividend in the amount of $0.38 per share of common stock to the stockholders of record on November 2, 2023. The dividend will be paid on November 16, 2023.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 32,775	$ 52,437	$ 28,342	$ 155,537

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
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)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation. The consolidated interim financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented. All such adjustments were of a normal and recurring nature. These financial statements should be read in conjunction with the financial statements and the notes thereto in the Company's Annual Report on Form 10-K for the year ended December 31, 2022. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements as of that date, but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the 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 nine months ended September 30, 2023, the economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering indicator requiring an interim goodwill impairment quantitative analysis for second quarter 2023. Based on an analysis performed, the Company's estimated fair value to a market participant as of June 30, 2023, exceeded its carrying amount resulting in no impairment charge for the period. During the third quarter 2023, management evaluated current conditions and concluded there have been no significant changes in the economic environment or future projections and therefore, believes that there has been no further decline in the Company's fair value as of September 30, 2023. Management will continue to evaluate the economic conditions at future reporting periods for applicable changes.
Subsequent events	Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the SEC and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 13. Subsequent Events .
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 and nine months ended September 30, 2023 and 2022. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price.
Allowance for Credit Losses on Loans	The Company's allowance balance is estimated using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term as well as for changes in environmental conditions, such as changes in unemployment rates, gross domestic product, property values, 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. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted to credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of interest rate lock commitments is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 10, Derivative Financial Instruments , for more information. Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures are based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.
Derivatives	Through its mortgage banking division, the Company enters into interest rate lock commitments with consumers to originate mortgage loans at a specified interest rate. These commitments, which contain fixed expiration dates, offer the borrower an interest rate guarantee provided the loan meets underwriting guidelines and closes within the timeframe established by the Company. The Company manages the changes in fair value associated with changes in interest rates related to interest rate lock commitments by using forward sold commitments known as forward mortgage-backed securities trades. These instruments are typically entered into at the time the interest rate lock commitment is made.The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. The interest rate swap derivative positions relate to transactions in which the Company enters into an interest rate swap with a customer, while at the same time entering into an offsetting interest rate swap with another financial institution. An interest rate swap transaction allows customers to effectively convert a variable rate loan to a fixed rate. In connection with each swap, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount.
Stock repurchase program	Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In January 2023, the Company's Board established the 2023 Stock Repurchase Plan (2023 Plan), which provided for the repurchase of up to $125,000 of common stock through December 31, 2023. There were no shares repurchased under the 2023 Plan during the three and nine months ended September 30, 2023. Under the prior plan, the Company repurchased 1,651,236 shares at a total cost of $115,966 during the nine months ended September 30, 2022. There were no shares repurchased during the three months ended September 30, 2022. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Earning Per Share	The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Basic earnings per share: Net income $ 32,775 $ 52,437 $ 28,342 $ 155,537 Less: Undistributed earnings (loss) allocated to participating securities 31 277 (43) 843 Dividends paid on participating securities 29 118 110 374 Net income available to common shareholders $ 32,715 $ 52,042 $ 28,275 $ 154,320 Weighted average basic shares outstanding 41,209,088 40,856,786 41,166,274 41,557,304 Basic earnings per share $ 0.79 $ 1.27 $ 0.69 $ 3.71 Diluted earnings per share: Net income available to common shareholders $ 32,715 $ 52,042 $ 28,275 $ 154,320 Total weighted average basic shares outstanding 41,209,088 40,856,786 41,166,274 41,557,304 Add dilutive performance stock units 96,070 86,404 91,025 80,521 Total weighted average diluted shares outstanding 41,305,158 40,943,190 41,257,299 41,637,825 Diluted earnings per share $ 0.79 $ 1.27 $ 0.69 $ 3.71 Anti-dilutive participating securities 18,639 100,019 36,484 125,664

Cash Flows (Tables)

Cash Flows (Tables)	9 Months Ended
	Sep. 30, 2023
Supplemental Cash Flow Elements [Abstract]
Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Nine Months Ended September 30, 2023 2022 Cash transactions: Interest expense paid $ 263,694 $ 50,154 Income taxes paid $ 18,781 $ 33,638 Noncash transactions: Deferred dividend equivalents $ (54) $ 146 Transfer of loans to other real estate owned $ — $ 23,900 Transfer of securities available for sale to held to maturity $ — $ 117,583 Right-of-use assets obtained in exchange for lease liabilities $ 6,625 $ 4,011 Loans purchased, not yet settled $ 19,095 $ 5,898 Transfer of bank premises to other real estate $ 805 $ —

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities and Approximate Fair Values	The amortized cost of securities and their approximate fair values at September 30, 2023 and December 31, 2022 are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale September 30, 2023 U.S. treasuries $ 236,068 $ — $ (19,600) $ 216,468 Government agency securities 467,813 — (93,721) 374,092 Obligations of state and municipal subdivisions 246,890 17 (22,205) 224,702 Corporate bonds 43,000 — (7,563) 35,437 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 858,269 — (163,564) 694,705 Other securities 500 — — 500 $ 1,852,540 $ 17 $ (306,653) $ 1,545,904 December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 Securities Held to Maturity September 30, 2023 Obligations of state and municipal subdivisions $ 205,689 $ — $ (57,188) $ 148,501 December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $6,610 and $7,702 on available for sale and $915 and $2,697 on held to maturity securities at September 30, 2023 and December 31, 2022, respectively, that is recorded in other assets on the accompanying consolidated balance sheets.
Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity	The amortized cost and estimated fair value of securities at September 30, 2023, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2023 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 79,113 $ 77,754 $ — $ — Due from one year to five years 322,219 294,567 — — Due from five to ten years 440,774 358,011 — — Thereafter 152,165 120,867 205,689 148,501 994,271 851,199 205,689 148,501 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 858,269 694,705 — — $ 1,852,540 $ 1,545,904 $ 205,689 $ 148,501 ____________ (1) Excludes accrued interest receivable of $6,610 on available for sale and $915 on held to maturity securities at September 30, 2023, that is recorded in other assets on the accompanying consolidated balance sheets.
Summary of Unrealized Losses and Fair Value Securities in Continuous Unrealized Loss Position	The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of September 30, 2023 and December 31, 2022, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale September 30, 2023 U.S. treasuries — $ — $ — 33 $ 216,468 $ (19,600) $ 216,468 $ (19,600) Government agency securities — — — 74 374,092 (93,721) 374,092 (93,721) Obligations of state and municipal subdivisions 116 75,008 (2,689) 236 147,528 (19,516) 222,536 (22,205) Corporate bonds — — — 11 32,437 (7,563) 32,437 (7,563) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 4 8,602 (910) 348 686,103 (162,654) 694,705 (163,564) 120 $ 83,610 $ (3,599) 702 $ 1,456,628 $ (303,054) $ 1,540,238 $ (306,653) December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) Securities Held to Maturity September 30, 2023 Obligations of state and municipal subdivisions 1 $ 6,687 $ (365) 42 $ 141,814 $ (56,823) $ 148,501 $ (57,188) December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820)

Loans, Net and Allowance for _2

Loans, Net and Allowance for Credit Losses on Loans (Tables)	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Compositions of Loans	Loans, net, at September 30, 2023 and December 31, 2022, consisted of the following: September 30, December 31, 2023 2022 Commercial $ 2,208,032 $ 2,240,959 Mortgage warehouse purchase loans 442,302 312,099 Real estate: Commercial 8,088,783 7,817,447 Commercial construction, land and land development 1,156,877 1,231,071 Residential 1,634,896 1,592,859 Single-family interim construction 491,051 508,839 Agricultural 121,883 124,422 Consumer 79,580 81,667 Total loans (1) 14,223,404 13,909,363 Allowance for credit losses (148,249) (148,787) Total loans, net (1) $ 14,075,155 $ 13,760,576 ____________
Summary of Activity in Allowance for Credit Losses by Loan Class	The following is a summary of the activity in the allowance for credit losses on loans by class for the three and nine months ended September 30, 2023 and 2022: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Total Three months ended September 30, 2023 Balance at beginning of period $ 34,581 $ 54,079 $ 33,462 $ 6,047 $ 18,333 $ 830 $ 472 $ 147,804 Provision for credit losses (491) 6,544 (3,704) 180 (1,578) (11) (58) 882 Charge-offs (525) — — — — (6) — (531) Recoveries 69 — 20 — — 5 — 94 Balance at end of period $ 33,634 $ 60,623 $ 29,778 $ 6,227 $ 16,755 $ 818 $ 414 $ 148,249 Nine months ended September 30, 2023 Balance at beginning of period $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ 148,787 Provision for credit losses (20,731) (455) 13,167 2,777 4,938 612 (79) 229 Charge-offs (593) — (1,196) — — (6) (9) (1,804) Recoveries 921 — 111 — — 5 — 1,037 Balance at end of period $ 33,634 $ 60,623 $ 29,778 $ 6,227 $ 16,755 $ 818 $ 414 $ 148,249 Three months ended September 30, 2022 Balance at beginning of period $ 53,303 $ 53,846 $ 24,186 $ 3,114 $ 9,225 $ 105 $ 391 $ 144,170 Provision for credit losses (2,307) 6,565 (1,921) (329) 1,471 37 4 3,520 Charge-offs (273) (1,187) — — — — — (1,460) Recoveries 84 — — 81 — — — 165 Balance at end of period $ 50,807 $ 59,224 $ 22,265 $ 2,866 $ 10,696 $ 142 $ 395 $ 146,395 Nine months ended September 30, 2022 Balance at beginning of period $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ 148,706 Provision for credit losses 1,345 (1,727) (1,596) 599 3,474 36 (63) 2,068 Charge-offs (726) (4,159) — (6) — — (10) (4,901) Recoveries 441 — — 81 — — — 522 Balance at end of period $ 50,807 $ 59,224 $ 22,265 $ 2,866 $ 10,696 $ 142 $ 395 $ 146,395
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 September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 20,638 $ 11,845 $ 21,981 $ 8,378 Commercial real estate 12,419 1,325 12,303 1,209 Commercial construction, land and land development — — — — Residential real estate — — — — Single-family interim construction 189 60 189 43 Agricultural — — — — Consumer — — — — $ 33,246 $ 13,230 $ 34,473 $ 9,630
Summary of Nonperforming Loans by Loan Class	Nonperforming loans by loan class at September 30, 2023 and December 31, 2022 are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total September 30, 2023 Nonaccrual loans (1) $ 21,197 $ 13,361 $ 11 $ 1,573 $ 189 $ — $ 6 $ 36,337 Loans past due 90 days and still accruing 252 396 1,120 320 — — — 2,088 Total nonperforming loans (2) $ 21,449 $ 13,757 $ 1,131 $ 1,893 $ 189 $ — $ 6 $ 38,425 December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 Total nonperforming loans $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 ____________ (1) There are $22 and $125 in loans on nonaccrual without an allowance for credit loss as of September 30, 2023 and December 31, 2022, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the three and nine months ended September 30, 2023 and 2022.
Aging of Past Due Loans by Loan Class	The following table presents information regarding the aging of past due loans by loan class as of September 30, 2023 and as of December 31, 2022: Loans Loans Total Past Current Total September 30, 2023 Commercial $ 543 $ 5,330 $ 5,873 $ 2,202,159 $ 2,208,032 Mortgage warehouse purchase loans — — — 442,302 442,302 Commercial real estate 12,278 12,815 25,093 8,063,690 8,088,783 Commercial construction, land and land development 294 1,120 1,414 1,155,463 1,156,877 Residential real estate 1,235 645 1,880 1,633,016 1,634,896 Single-family interim construction 919 189 1,108 489,943 491,051 Agricultural 37 — 37 121,846 121,883 Consumer 116 4 120 79,460 79,580 $ 15,422 $ 20,103 $ 35,525 $ 14,187,879 $ 14,223,404 December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363
Summary of Loans by Credit Quality Indicator by Class	The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of September 30, 2023 and December 31, 2022: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Commercial Pass $ 165,982 $ 239,581 $ 306,149 $ 91,368 $ 103,445 $ 168,927 $ 1,011,202 $ 654 $ 2,087,308 Pass/Watch 193 8,562 10,223 129 95 9,485 15,943 — 44,630 Special Mention 206 — 14,417 89 3,032 207 5,885 1,151 24,987 Substandard 7,501 7,934 20,885 326 2,753 1,018 7,074 3,616 51,107 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 173,882 $ 256,077 $ 351,674 $ 91,912 $ 109,325 $ 179,637 $ 1,040,104 $ 5,421 $ 2,208,032 Current period gross write-offs $ 285 $ — $ 272 $ 5 $ 4 $ 27 $ — $ — $ 593 Mortgage warehouse purchase loans Pass $ 442,302 $ — $ — $ — $ — $ — $ — $ — $ 442,302 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 442,302 $ — $ — $ — $ — $ — $ — $ — $ 442,302 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Commercial real estate Pass $ 670,557 $ 2,606,179 $ 1,933,507 $ 928,564 $ 556,398 $ 858,411 $ 67,205 $ 4,239 $ 7,625,060 Pass/Watch 16,468 65,784 55,831 44,754 20,893 59,370 1 — 263,101 Special Mention 10,664 33,000 21,079 4,333 12,508 6,916 — 351 88,851 Substandard 12,778 28,727 54,656 4,798 3,698 7,114 — — 111,771 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 710,467 $ 2,733,690 $ 2,065,073 $ 982,449 $ 593,497 $ 931,811 $ 67,206 $ 4,590 $ 8,088,783 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial construction, land and land development Pass $ 297,204 $ 447,008 $ 244,936 $ 72,496 $ 7,031 $ 15,607 $ 13,329 $ 75 $ 1,097,686 Pass/Watch 11,294 14,018 34 7,151 — 61 1 — 32,559 Special Mention 4,853 — 21,278 464 — — — — 26,595 Substandard — 26 — — — 11 — — 37 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 313,351 $ 461,052 $ 266,248 $ 80,111 $ 7,031 $ 15,679 $ 13,330 $ 75 $ 1,156,877 Current period gross write-offs $ — $ — $ 1,196 $ — $ — $ — $ — $ — $ 1,196 Residential real estate Pass $ 133,726 $ 509,169 $ 367,164 $ 222,789 $ 141,320 $ 180,665 $ 64,676 $ 236 $ 1,619,745 Pass/Watch — 363 840 2,919 1,690 1,936 85 — 7,833 Special Mention — — — — 1,075 1,028 — 265 2,368 Substandard 472 675 18 506 216 3,015 48 — 4,950 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 134,198 $ 510,207 $ 368,022 $ 226,214 $ 144,301 $ 186,644 $ 64,809 $ 501 $ 1,634,896 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Single-family interim construction Pass $ 215,748 $ 188,763 $ 25,203 $ — $ — $ — $ 57,693 $ — $ 487,407 Pass/Watch 2,535 919 — — — — 1 — 3,455 Special Mention — — — — — — — — — Substandard — — 189 — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 218,283 $ 189,682 $ 25,392 $ — $ — $ — $ 57,694 $ — $ 491,051 Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans September 30, 2023 2023 2022 2021 2020 2019 Prior Total Agricultural Pass $ 14,127 $ 46,282 $ 22,843 $ 11,776 $ 3,529 $ 11,730 $ 9,302 $ — $ 119,589 Pass/Watch — 2,275 — — — — — — 2,275 Special Mention — — — — — — — — — Substandard — — — — — 19 — — 19 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 14,127 $ 48,557 $ 22,843 $ 11,776 $ 3,529 $ 11,749 $ 9,302 $ — $ 121,883 Current period gross write-offs $ — $ 5 $ 1 $ — $ — $ — $ — $ — $ 6 Consumer Pass $ 5,416 $ 4,082 $ 1,623 $ 8,313 $ 1,320 $ 175 $ 56,323 $ 99 $ 77,351 Pass/Watch — 306 1,917 — — — — — 2,223 Special Mention — — — — — — — — — Substandard — — 2 — — 4 — — 6 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 5,416 $ 4,388 $ 3,542 $ 8,313 $ 1,320 $ 179 $ 56,323 $ 99 $ 79,580 Current period gross write-offs $ — $ 9 $ — $ — $ — $ — $ — $ — $ 9 Total loans Pass $ 1,945,062 $ 4,041,064 $ 2,901,425 $ 1,335,306 $ 813,043 $ 1,235,515 $ 1,279,730 $ 5,303 $ 13,556,448 Pass/Watch 30,490 92,227 68,845 54,953 22,678 70,852 16,031 — 356,076 Special Mention 15,723 33,000 56,774 4,886 16,615 8,151 5,885 1,767 142,801 Substandard 20,751 37,362 75,750 5,630 6,667 11,181 7,122 3,616 168,079 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 2,012,026 $ 4,203,653 $ 3,102,794 $ 1,400,775 $ 859,003 $ 1,325,699 $ 1,308,768 $ 10,686 $ 14,223,404 Current period gross write-offs $ 285 $ 14 $ 1,469 $ 5 $ 4 $ 27 $ — $ — $ 1,804 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Commercial real estate Pass $ 2,652,298 $ 1,980,631 $ 998,910 $ 617,664 $ 448,758 $ 640,275 $ 59,184 $ 9,222 $ 7,406,942 Pass/Watch 90,313 25,954 33,664 18,678 53,469 25,831 — — 247,909 Special Mention 10,180 41,193 — 10,870 8,722 10,735 — 26 81,726 Substandard 3,513 40,001 8,574 3,178 8,268 17,336 — — 80,870 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 2,756,304 $ 2,087,779 $ 1,041,148 $ 650,390 $ 519,217 $ 694,177 $ 59,184 $ 9,248 $ 7,817,447 Commercial construction, land and land development Pass $ 553,376 $ 465,272 $ 126,704 $ 10,477 $ 23,073 $ 12,188 $ 12,705 $ 4,018 $ 1,207,813 Pass/Watch 8,036 43 10,297 — — 72 — — 18,448 Special Mention 1,313 674 — — — — — — 1,987 Substandard 28 2,771 — 10 — 14 — — 2,823 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 562,753 $ 468,760 $ 137,001 $ 10,487 $ 23,073 $ 12,274 $ 12,705 $ 4,018 $ 1,231,071 Residential real estate Pass $ 525,631 $ 379,789 $ 220,077 $ 155,460 $ 79,437 $ 154,875 $ 59,332 $ 1,238 $ 1,575,839 Pass/Watch 373 918 642 1,743 76 3,312 302 — 7,366 Special Mention 2,267 — — 700 227 1,224 126 — 4,544 Substandard 708 455 538 219 — 2,997 193 — 5,110 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 528,979 $ 381,162 $ 221,257 $ 158,122 $ 79,740 $ 162,408 $ 59,953 $ 1,238 $ 1,592,859 Single-family interim construction Pass $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ — $ 16,447 $ — $ 492,177 Pass/Watch 16,471 — — — — — 2 — 16,473 Special Mention — — — — — — — — — Substandard — 189 — — — — — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 367,502 $ 105,762 $ 18,885 $ — $ 241 $ — $ 16,449 $ — $ 508,839 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Agricultural Pass $ 52,525 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,872 $ 10,588 $ — $ 120,155 Pass/Watch 2,700 — — — — — 1,547 — 4,247 Special Mention — — — — — — — — — Substandard — — — — — 20 — — 20 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 55,225 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,892 $ 12,135 $ — $ 124,422 Consumer Pass $ 7,715 $ 4,909 $ 7,959 $ 1,576 $ 300 $ 81 $ 59,113 $ — $ 81,653 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 4 — — — 10 — — 14 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 7,715 $ 4,913 $ 7,959 $ 1,576 $ 300 $ 91 $ 59,113 $ — $ 81,667 Total loans Pass $ 4,752,475 $ 3,308,718 $ 1,512,800 $ 901,769 $ 609,279 $ 969,726 $ 1,248,852 $ 15,651 $ 13,319,270 Pass/Watch 117,901 41,705 44,758 20,609 55,357 37,149 10,067 5,907 333,453 Special Mention 13,994 46,688 101 13,055 8,949 12,103 8,772 46 103,708 Substandard 4,643 79,370 9,510 12,598 8,323 27,414 11,033 41 152,932 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 4,889,013 $ 3,476,481 $ 1,567,169 $ 948,031 $ 681,908 $ 1,046,392 $ 1,278,724 $ 21,645 $ 13,909,363

Off-Balance Sheet Arrangement_2

Off-Balance Sheet Arrangements, Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	At September 30, 2023 and December 31, 2022, the approximate amounts of these financial instruments were as follows: September 30, December 31, 2023 2022 Commitments to extend credit $ 2,917,204 $ 3,291,409 Standby letters of credit 29,046 24,135 $ 2,946,250 $ 3,315,544
Commitments Off Balance Sheet Allowance for Credit Losses	The allowance for credit lo sses on off-balance sheet commitments was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Balance at beginning of period $ 4,907 $ 4,731 $ 3,944 $ 4,722 Provision for off-balance sheet credit exposure (542) (420) 421 (411) Balance at end of period $ 4,365 $ 4,311 $ 4,365 $ 4,311

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax expense for the three and nine months ended September 30, 2023 and 2022 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Income tax expense for the period $ 8,246 $ 13,481 $ 5,662 $ 39,351 Effective tax rate 20.1 % 20.5 % 16.7 % 20.2 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Assets at Fair Value on Recurring Basis	The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of September 30, 2023 and December 31, 2022 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant September 30, 2023 Assets: Investment securities available for sale: U.S. treasuries $ 216,468 $ — $ 216,468 $ — Government agency securities 374,092 — 374,092 — Obligations of state and municipal subdivisions 224,702 — 224,702 — Corporate bonds 35,437 — 35,437 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 694,705 — 694,705 — Other securities 500 — 500 — Loans held for sale, fair value option elected (1) 10,499 — 10,499 — Derivative financial instruments: Interest rate lock commitments 353 — 353 — Forward mortgage-backed securities trades 71 — 71 — Financial institution counterparty 14,331 — 14,331 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,583 — 11,583 — Forward mortgage-backed securities trades 13 — 13 — Loan customer counterparty 14,176 — 14,176 — December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — __________ (1) At September 30, 2023 and December 31, 2022, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $10,272 and $10,330, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at September 30, 2023.
Assets and Liabilities at Fair Value on Nonrecurring Basis	The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at September 30, 2023 and December 31, 2022, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended September 30, 2023 Assets: Individually evaluated loans $ 5,359 $ — $ — $ 5,359 $ 3,552 Other real estate owned 22,505 — — 22,505 3,037 December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548
Carrying Amount and Estimated Fair Value of Financial Instruments	The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at September 30, 2023 and December 31, 2022: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant September 30, 2023 Financial assets: Cash and cash equivalents $ 711,709 $ 711,709 $ 711,709 $ — $ — Certificates of deposit held in other banks 248 241 — 241 — Investment securities held to maturity 205,689 148,501 — 148,501 — Loans held for sale, at cost 7,569 7,734 — 7,734 — Loans, net 14,075,155 13,824,742 — — 13,824,742 FHLB of Dallas stock and other restricted stock 25,496 25,496 — 25,496 — Accrued interest receivable 58,780 58,780 — 58,780 — Financial liabilities: Deposits 15,340,969 15,296,064 — 15,296,064 — Accrued interest payable 34,546 34,546 — 34,546 — FHLB advances 275,000 275,014 — 275,014 — Other borrowings 271,666 253,625 — 253,625 — Junior subordinated debentures 54,568 58,789 — 58,789 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — —

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Balances and Fair Values of Outstanding Positions	The following table provides the outstanding notional balances and fair values of outstanding derivative positions at September 30, 2023 and December 31, 2022: Outstanding Notional Balance Asset Derivative Liability Derivative September 30, 2023 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,583 Derivatives not designated as hedging instruments: Interest rate lock commitments 20,111 353 — Forward mortgage-backed securities trades 21,000 71 13 Commercial loan interest rate swaps: Loan customer counterparty 202,915 — 14,176 Financial institution counterparty 202,915 14,331 — December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 —
Schedule of Weighted Average Interest Rate Received and Paid	The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate September 30, 2023 December 31, 2022 Received Paid Received Paid Loan customer counterparty 4.53 % 7.86 % 4.12 % 6.72 %
Income on Derivatives	A summary of derivative activity and the related impact on the consolidated statements of income for the three and nine months ended September 30, 2023 and 2022 is as follows: Income Statement Location Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (1,119) $ (326) $ (3,048) $ (93) Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue 5 (544) 65 (957) Forward mortgage-backed securities trades Mortgage banking revenue (33) 470 (29) 458

Stock Awards (Tables)

Stock Awards (Tables)	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Summary of nonvested restricted stock awards	The following table summarizes the activity in nonvested restricted stock awards for the nine months ended September 30, 2023 and 2022: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2022 309,015 $ 60.12 Granted during the period 136,909 56.99 Vested during the period (144,677) 58.64 Forfeited during the period (4,844) 62.81 Nonvested shares, September 30, 2023 296,403 $ 59.36 Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 111,095 72.55 Vested during the period (161,936) 53.83 Forfeited during the period (7,301) 55.06 Nonvested shares, September 30, 2022 305,409 $ 59.79
Schedule of future vesting of restricted stock award	At September 30, 2023, the future vesting schedule of the nonvested restricted stock awards is as follows: First year 151,166 Second year 80,278 Third year 56,411 Fourth year 8,548 Total nonvested shares 296,403
Nonvested performance stock units	The following table summarizes the activity in nonvested performance stock units at target award level for the nine months ended September 30, 2023 and 2022: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2022 140,240 $ 49.20 Granted during the period 37,938 60.21 Nonvested shares, September 30, 2023 178,178 $ 51.55 Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 20,742 73.94 Nonvested shares, September 30, 2022 135,240 $ 48.53

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2023
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements	The following table presents actual and required capital ratios under Basel III Capital Rules for the Company and Bank as of September 30, 2023 and December 31, 2022. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio September 30, 2023 Total capital to risk weighted assets: Consolidated $ 1,879,020 11.89 % $ 1,659,872 10.50 % $ 1,580,830 10.00 % Bank 2,011,879 12.73 1,659,341 10.50 1,580,324 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,614,462 10.21 1,343,706 8.50 948,498 6.00 Bank 1,877,321 11.88 1,343,276 8.50 1,264,259 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,862 9.86 1,106,581 7.00 N/A N/A Bank 1,877,321 11.88 1,106,227 7.00 1,027,211 6.50 Tier 1 capital to average assets: Consolidated 1,614,462 9.09 710,397 4.00 N/A N/A Bank 1,877,321 10.57 710,202 4.00 887,753 5.00 December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 USD ($) segment business_trust
Accounting Policies [Abstract]
Number of wholly owned statutory business trusts | business_trust	9
Number of reportable segments | segment	1
Goodwill, impairment | $	$ 0

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Basic earnings per share:
Net income	$ 32,775	$ 52,437	$ 28,342	$ 155,537
Less: Undistributed earnings (loss) allocated to participating securities	31	277	(43)	843
Less: Dividends paid on participating securities	29	118	110	374
Net income available to common shareholders	$ 32,715	$ 52,042	$ 28,275	$ 154,320
Weighted average basic shares outstanding (shares)	41,209,088	40,856,786	41,166,274	41,557,304
Basic earnings per share (usd per share)	$ 0.79	$ 1.27	$ 0.69	$ 3.71
Diluted earnings per share:
Total weighted average diluted shares outstanding (shares)	41,305,158	40,943,190	41,257,299	41,637,825
Diluted earnings per share (usd per share)	$ 0.79	$ 1.27	$ 0.69	$ 3.71
Anti-dilutive participating securities (shares)	18,639	100,019	36,484	125,664
Performance stock units
Diluted earnings per share:
Add dilutive performance stock (shares)	96,070	86,404	91,025	80,521

Cash Flows - Other Supplemental

Cash Flows - Other Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash transactions:
Interest expense paid	$ 263,694	$ 50,154
Income taxes paid	18,781	33,638
Noncash transactions:
Deferred dividend equivalents	(54)	146
Transfer of loans to other real estate owned	0	23,900
Transfer of securities available for sale to held to maturity	0	117,583
Right-of-use assets obtained in exchange for lease liabilities	6,625	4,011
Loans purchased, not yet settled	19,095	5,898
Transfer of bank premises to other real estate	$ 805	$ 0

Securities - Amortized Cost of

Securities - Amortized Cost of Securities and Approximate Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	$ 1,852,540	$ 1,950,426
Gross Unrealized Gain, AFS	17	115
Gross Unrealized Loss, AFS	(306,653)	(258,757)
Fair Value, AFS	1,545,904	1,691,784
Amortized Cost, HTM	205,689	207,059
Fair Value, HTM	148,501
Accrued Interest, AFS	6,610	7,702
Accrued Interest, HTM	915	2,697
U.S. treasuries
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	236,068	259,675
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(19,600)	(20,265)
Fair Value, AFS	216,468	239,410
Government agency securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	467,813	468,994
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(93,721)	(84,479)
Fair Value, AFS	374,092	384,515
Obligations of state and municipal subdivisions
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	246,890	264,419
Gross Unrealized Gain, AFS	17	106
Gross Unrealized Loss, AFS	(22,205)	(13,294)
Fair Value, AFS	224,702	251,231
Amortized Cost, HTM	205,689	207,059
Gross Unrealized Gain, HTM	0	0
Gross Unrealized Loss, HTM	(57,188)	(44,820)
Fair Value, HTM	148,501	162,239
Corporate bonds
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	43,000	43,000
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	(7,563)	(5,795)
Fair Value, AFS	35,437	37,205
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	858,269	913,388
Gross Unrealized Gain, AFS	0	9
Gross Unrealized Loss, AFS	(163,564)	(134,924)
Fair Value, AFS	694,705	778,473
Other securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	500	950
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	0	0
Fair Value, AFS	$ 500	$ 950

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Securities transferred from AFS to HTM			$ 117,583,000
Transfers unrealized pre-tax gains			26,000
Carrying value of securities pledged	$ 863,921,000		1,168,006,000
Proceeds from sales	0	$ 0
Allowance for credit loss, AFS securities	0
Allowance for credit loss, HTM securities	$ 0		$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost, AFS
Due in one year or less	$ 79,113
Due from one year to five years	322,219
Due from five to ten years	440,774
Thereafter	152,165
Total	994,271
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	858,269
Amortized Cost, AFS	1,852,540	$ 1,950,426
Fair Value, AFS
Due in one year or less	77,754
Due from one year to five years	294,567
Due from five to ten years	358,011
Thereafter	120,867
Total	851,199
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	694,705
Fair Value	1,545,904	1,691,784
Amortized Cost, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	205,689
Total	205,689
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Amortized Cost, HTM	205,689	$ 207,059
Fair Value, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	148,501
Total	148,501
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Fair Value	$ 148,501

Securities Available for Sale -

Securities Available for Sale - Proceeds, Gross Gains and Gross Losses from Sale (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 0	$ 0

Securities - Summary of Unreali

Securities - Summary of Unrealized Losses and Fair Value of Securities in Continuous Unrealized Loss Positions (Details) $ in Thousands	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	120	599
Less than 12 months: estimated fair value AFS	$ 83,610	$ 670,035
Less than 12 months: unrealized losses AFS	$ (3,599)	$ (50,317)
Greater than 12 months: number of securities AFS | security	702	226
Greater than 12 months: estimated fair value AFS	$ 1,456,628	$ 992,487
Greater than 12 months: unrealized losses AFS	(303,054)	(208,440)
Total: estimated fair value AFS	1,540,238	1,662,522
Total: unrealized losses AFS	$ (306,653)	$ (258,757)
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	0	13
Less than 12 months: estimated fair value AFS	$ 0	$ 106,849
Less than 12 months: unrealized losses AFS	$ 0	$ (3,923)
Greater than 12 months: number of securities AFS | security	33	23
Greater than 12 months: estimated fair value AFS	$ 216,468	$ 132,561
Greater than 12 months: unrealized losses AFS	(19,600)	(16,342)
Total: estimated fair value AFS	216,468	239,410
Total: unrealized losses AFS	$ (19,600)	$ (20,265)
Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	0	13
Less than 12 months: estimated fair value AFS	$ 0	$ 63,451
Less than 12 months: unrealized losses AFS	$ 0	$ (7,533)
Greater than 12 months: number of securities AFS | security	74	62
Greater than 12 months: estimated fair value AFS	$ 374,092	$ 321,064
Greater than 12 months: unrealized losses AFS	(93,721)	(76,946)
Total: estimated fair value AFS	374,092	384,515
Total: unrealized losses AFS	$ (93,721)	$ (84,479)
Obligations of state and municipal subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	116	339
Less than 12 months: estimated fair value AFS	$ 75,008	$ 209,395
Less than 12 months: unrealized losses AFS	$ (2,689)	$ (9,068)
Greater than 12 months: number of securities AFS | security	236	9
Greater than 12 months: estimated fair value AFS	$ 147,528	$ 17,034
Greater than 12 months: unrealized losses AFS	(19,516)	(4,226)
Total: estimated fair value AFS	222,536	226,429
Total: unrealized losses AFS	$ (22,205)	$ (13,294)
Less than 12 months: number of securities HTM | security	1	22
Less than 12 months: estimated fair value HTM	$ 6,687	$ 98,475
Less than 12 months: unrealized losses HTM	$ (365)	$ (21,210)
Greater than 12 months: number of securities HTM | security	42	21
Greater than 12 months: estimated fair value HTM	$ 141,814	$ 63,764
Greater than 12 months: unrealized losses HTM	(56,823)	(23,610)
Total: estimated fair value HTM	148,501	162,239
Total: unrealized losses HTM	$ (57,188)	$ (44,820)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	0	8
Less than 12 months: estimated fair value AFS	$ 0	$ 23,584
Less than 12 months: unrealized losses AFS	$ 0	$ (4,416)
Greater than 12 months: number of securities AFS | security	11	3
Greater than 12 months: estimated fair value AFS	$ 32,437	$ 10,621
Greater than 12 months: unrealized losses AFS	(7,563)	(1,379)
Total: estimated fair value AFS	32,437	34,205
Total: unrealized losses AFS	$ (7,563)	$ (5,795)
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities AFS | security	4	226
Less than 12 months: estimated fair value AFS	$ 8,602	$ 266,756
Less than 12 months: unrealized losses AFS	$ (910)	$ (25,377)
Greater than 12 months: number of securities AFS | security	348	129
Greater than 12 months: estimated fair value AFS	$ 686,103	$ 511,207
Greater than 12 months: unrealized losses AFS	(162,654)	(109,547)
Total: estimated fair value AFS	694,705	777,963
Total: unrealized losses AFS	$ (163,564)	$ (134,924)

Loans, Net and Allowance for _3

Loans, Net and Allowance for Credit Losses on Loans - Composition of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,223,404		$ 13,909,363
Allowance for credit losses	(148,249)	$ (147,804)	(148,787)	$ (146,395)	$ (144,170)	$ (148,706)
Total loans, net	14,075,155		13,760,576
Accrued Interest Receivable	50,835		48,815
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,208,032		2,240,959
Allowance for credit losses	(33,634)	(34,581)	(54,037)	(50,807)	(53,303)	(49,747)
Mortgage warehouse purchase loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	442,302		312,099
Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,088,783		7,817,447
Allowance for credit losses	(60,623)	(54,079)	(61,078)	(59,224)	(53,846)	(65,110)
Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,156,877		1,231,071
Allowance for credit losses	(29,778)	(33,462)	(17,696)	(22,265)	(24,186)	(23,861)
Real estate | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,634,896		1,592,859
Allowance for credit losses	(6,227)	(6,047)	(3,450)	(2,866)	(3,114)	(2,192)
Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	491,051		508,839
Allowance for credit losses	(16,755)	(18,333)	(11,817)	(10,696)	(9,225)	(7,222)
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	121,883		124,422
Allowance for credit losses	(818)	(830)	(207)	(142)	(105)	(106)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	79,580		81,667
Allowance for credit losses	$ (414)	$ (472)	$ (502)	$ (395)	$ (391)	$ (468)

Loans, Net and Allowance for _4

Loans, Net and Allowance for Credit Losses on Loans - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged	$ 7,990,175,000		$ 7,246,087,000
Commercial Loans	14,075,155,000		13,760,576,000
Allowance for credit losses	148,249,000	$ 147,804,000	148,787,000	$ 146,395,000	$ 144,170,000	$ 148,706,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	33,634,000	34,581,000	54,037,000	50,807,000	53,303,000	49,747,000
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	818,000	830,000	207,000	142,000	105,000	106,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 414,000	$ 472,000	502,000	$ 395,000	$ 391,000	$ 468,000
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 | Colorado
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of the portfolio	27%
Energy Related Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	$ 613,887,000		$ 574,698,000
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	22%
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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 147,804	$ 144,170	$ 148,787	$ 148,706
Provision for credit losses	882	3,520	229	2,068
Charge-offs	(531)	(1,460)	(1,804)	(4,901)
Recoveries	94	165	1,037	522
Balance at end of period	148,249	146,395	148,249	146,395
Commercial
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	34,581	53,303	54,037	49,747
Provision for credit losses	(491)	(2,307)	(20,731)	1,345
Charge-offs	(525)	(273)	(593)	(726)
Recoveries	69	84	921	441
Balance at end of period	33,634	50,807	33,634	50,807
Real estate | Commercial Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	54,079	53,846	61,078	65,110
Provision for credit losses	6,544	6,565	(455)	(1,727)
Charge-offs	0	(1,187)	0	(4,159)
Recoveries	0	0	0	0
Balance at end of period	60,623	59,224	60,623	59,224
Real estate | Commercial Construction, Land and Land Development
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	33,462	24,186	17,696	23,861
Provision for credit losses	(3,704)	(1,921)	13,167	(1,596)
Charge-offs	0	0	(1,196)	0
Recoveries	20	0	111	0
Balance at end of period	29,778	22,265	29,778	22,265
Real estate | Residential Real Estate
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,047	3,114	3,450	2,192
Provision for credit losses	180	(329)	2,777	599
Charge-offs	0	0	0	(6)
Recoveries	0	81	0	81
Balance at end of period	6,227	2,866	6,227	2,866
Real estate | Single-family interim construction
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	18,333	9,225	11,817	7,222
Provision for credit losses	(1,578)	1,471	4,938	3,474
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	16,755	10,696	16,755	10,696
Agricultural
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	830	105	207	106
Provision for credit losses	(11)	37	612	36
Charge-offs	(6)	0	(6)	0
Recoveries	5	0	5	0
Balance at end of period	818	142	818	142
Consumer
Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	472	391	502	468
Provision for credit losses	(58)	4	(79)	(63)
Charge-offs	0	0	(9)	(10)
Recoveries	0	0	0	0
Balance at end of period	$ 414	$ 395	$ 414	$ 395

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	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Loan Balance	$ 33,246	$ 34,473
Specific Allocations	13,230	9,630
Commercial
Financing Receivable, Impaired [Line Items]
Loan Balance	20,638	21,981
Specific Allocations	11,845	8,378
Real estate | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Loan Balance	12,419	12,303
Specific Allocations	1,325	1,209
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	0	0
Specific Allocations	0	0
Real estate | Single-family interim construction
Financing Receivable, Impaired [Line Items]
Loan Balance	189	189
Specific Allocations	60	43
Agricultural
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	0	0
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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, no allowance	$ 22,000		$ 22,000		$ 125,000
Financing Receivable, Nonaccrual, Interest Income	0	$ 0	0	$ 0
Nonperforming Financial Instruments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	36,337,000		36,337,000		37,752,000
Loans past due 90 days and still accruing	2,088,000		2,088,000		843,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					1,494,000
Total nonperforming loans	38,425,000		38,425,000		40,089,000
Nonperforming Financial Instruments | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	21,197,000		21,197,000		22,565,000
Loans past due 90 days and still accruing	252,000		252,000		5,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					0
Total nonperforming loans	21,449,000		21,449,000		22,570,000
Nonperforming Financial Instruments | Real estate | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	13,361,000		13,361,000		13,393,000
Loans past due 90 days and still accruing	396,000		396,000		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					1,435,000
Total nonperforming loans	13,757,000		13,757,000		14,828,000
Nonperforming Financial Instruments | Real estate | Commercial Construction, Land and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	11,000		11,000		15,000
Loans past due 90 days and still accruing	1,120,000		1,120,000		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					0
Total nonperforming loans	1,131,000		1,131,000		15,000
Nonperforming Financial Instruments | Real estate | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,573,000		1,573,000		1,582,000
Loans past due 90 days and still accruing	320,000		320,000		838,000
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					59,000
Total nonperforming loans	1,893,000		1,893,000		2,479,000
Nonperforming Financial Instruments | Real estate | Single-family interim construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	189,000		189,000		189,000
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					0
Total nonperforming loans	189,000		189,000		189,000
Nonperforming Financial Instruments | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0		0		0
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					0
Total nonperforming loans	0		0		0
Nonperforming Financial Instruments | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	6,000		6,000		8,000
Loans past due 90 days and still accruing	0		0		0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)					0
Total nonperforming loans	$ 6,000		$ 6,000		$ 8,000

Loans, Net and Allowance for _8

Loans, Net and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans	$ 14,223,404	$ 13,909,363
Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,208,032	2,240,959
Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	442,302	312,099
Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	8,088,783	7,817,447
Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,156,877	1,231,071
Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,634,896	1,592,859
Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	491,051	508,839
Agricultural
Financing Receivable, Past Due [Line Items]
Loans	121,883	124,422
Consumer
Financing Receivable, Past Due [Line Items]
Loans	79,580	81,667
Loans 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	15,422	21,834
Loans 30-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	543	1,005
Loans 30-89 Days Past Due | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 30-89 Days Past Due | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	12,278	13,093
Loans 30-89 Days Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	294	2,820
Loans 30-89 Days Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,235	4,702
Loans 30-89 Days Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	919	0
Loans 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	37	0
Loans 30-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	116	214
Loans 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	20,103	7,621
Loans 90 Days or More Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	5,330	5,629
Loans 90 Days or More Past Due | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	12,815	449
Loans 90 Days or More Past Due | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,120	0
Loans 90 Days or More Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	645	1,346
Loans 90 Days or More Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	189	189
Loans 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	4	8
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Loans	35,525	29,455
Total Past Due Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	5,873	6,634
Total Past Due Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Total Past Due Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	25,093	13,542
Total Past Due Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,414	2,820
Total Past Due Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,880	6,048
Total Past Due Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	1,108	189
Total Past Due Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	37	0
Total Past Due Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	120	222
Current Loans
Financing Receivable, Past Due [Line Items]
Loans	14,187,879	13,879,908
Current Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,202,159	2,234,325
Current Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	442,302	312,099
Current Loans | Real estate | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Loans	8,063,690	7,803,905
Current Loans | Real estate | Commercial Construction, Land and Land Development
Financing Receivable, Past Due [Line Items]
Loans	1,155,463	1,228,251
Current Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,633,016	1,586,811
Current Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	489,943	508,650
Current Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	121,846	124,422
Current Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 79,460	$ 81,445

Loans, Net and Allowance for _9

Loans, Net and Allowance for Credit Losses on Loans - Loans held for investment by year of origination and internally assigned credit grade (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	$ 2,012,026		$ 2,012,026		$ 4,889,013
Term Loans by Year of Origination or Renewal, Year 2	4,203,653		4,203,653		3,476,481
Term Loans by Year of Origination or Renewal, Year 3	3,102,794		3,102,794		1,567,169
Term Loans by Year of Origination or Renewal, Year 4	1,400,775		1,400,775		948,031
Term Loans by Year of Origination or Renewal, Year 5	859,003		859,003		681,908
Term Loans by Year of Origination or Renewal, Prior	1,325,699		1,325,699		1,046,392
Revolving Loans	1,308,768		1,308,768		1,278,724
Revolving Loans Converted to Term Loans	10,686		10,686		21,645
Total Loans	14,223,404		14,223,404		13,909,363
Term Loans by Year of Origination or Renewal, Current write-offs			285
Term Loans by Year of Origination or Renewal, Year 2 write-offs			14
Term Loans by Year of Origination or Renewal, Year 3 write-offs			1,469
Term Loans by Year of Origination or Renewal, Year 4 write-offs			5
Term Loans by Year of Origination or Renewal, Year 5 write-offs			4
Term Loans by Year of Origination or Renewal, Prior write-offs			27
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	531	$ 1,460	1,804	$ 4,901
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	1,945,062		1,945,062		4,752,475
Term Loans by Year of Origination or Renewal, Year 2	4,041,064		4,041,064		3,308,718
Term Loans by Year of Origination or Renewal, Year 3	2,901,425		2,901,425		1,512,800
Term Loans by Year of Origination or Renewal, Year 4	1,335,306		1,335,306		901,769
Term Loans by Year of Origination or Renewal, Year 5	813,043		813,043		609,279
Term Loans by Year of Origination or Renewal, Prior	1,235,515		1,235,515		969,726
Revolving Loans	1,279,730		1,279,730		1,248,852
Revolving Loans Converted to Term Loans	5,303		5,303		15,651
Total Loans	13,556,448		13,556,448		13,319,270
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	30,490		30,490		117,901
Term Loans by Year of Origination or Renewal, Year 2	92,227		92,227		41,705
Term Loans by Year of Origination or Renewal, Year 3	68,845		68,845		44,758
Term Loans by Year of Origination or Renewal, Year 4	54,953		54,953		20,609
Term Loans by Year of Origination or Renewal, Year 5	22,678		22,678		55,357
Term Loans by Year of Origination or Renewal, Prior	70,852		70,852		37,149
Revolving Loans	16,031		16,031		10,067
Revolving Loans Converted to Term Loans	0		0		5,907
Total Loans	356,076		356,076		333,453
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	15,723		15,723		13,994
Term Loans by Year of Origination or Renewal, Year 2	33,000		33,000		46,688
Term Loans by Year of Origination or Renewal, Year 3	56,774		56,774		101
Term Loans by Year of Origination or Renewal, Year 4	4,886		4,886		13,055
Term Loans by Year of Origination or Renewal, Year 5	16,615		16,615		8,949
Term Loans by Year of Origination or Renewal, Prior	8,151		8,151		12,103
Revolving Loans	5,885		5,885		8,772
Revolving Loans Converted to Term Loans	1,767		1,767		46
Total Loans	142,801		142,801		103,708
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	20,751		20,751		4,643
Term Loans by Year of Origination or Renewal, Year 2	37,362		37,362		79,370
Term Loans by Year of Origination or Renewal, Year 3	75,750		75,750		9,510
Term Loans by Year of Origination or Renewal, Year 4	5,630		5,630		12,598
Term Loans by Year of Origination or Renewal, Year 5	6,667		6,667		8,323
Term Loans by Year of Origination or Renewal, Prior	11,181		11,181		27,414
Revolving Loans	7,122		7,122		11,033
Revolving Loans Converted to Term Loans	3,616		3,616		41
Total Loans	168,079		168,079		152,932
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	173,882		173,882		298,436
Term Loans by Year of Origination or Renewal, Year 2	256,077		256,077		403,362
Term Loans by Year of Origination or Renewal, Year 3	351,674		351,674		127,044
Term Loans by Year of Origination or Renewal, Year 4	91,912		91,912		123,751
Term Loans by Year of Origination or Renewal, Year 5	109,325		109,325		53,490
Term Loans by Year of Origination or Renewal, Prior	179,637		179,637		168,550
Revolving Loans	1,040,104		1,040,104		1,059,185
Revolving Loans Converted to Term Loans	5,421		5,421		7,141
Total Loans	2,208,032		2,208,032		2,240,959
Term Loans by Year of Origination or Renewal, Current write-offs			285
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			272
Term Loans by Year of Origination or Renewal, Year 4 write-offs			5
Term Loans by Year of Origination or Renewal, Year 5 write-offs			4
Term Loans by Year of Origination or Renewal, Prior write-offs			27
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	525	273	593	726
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	165,982		165,982		297,800
Term Loans by Year of Origination or Renewal, Year 2	239,581		239,581		347,801
Term Loans by Year of Origination or Renewal, Year 3	306,149		306,149		126,390
Term Loans by Year of Origination or Renewal, Year 4	91,368		91,368		112,887
Term Loans by Year of Origination or Renewal, Year 5	103,445		103,445		51,623
Term Loans by Year of Origination or Renewal, Prior	168,927		168,927		153,435
Revolving Loans	1,011,202		1,011,202		1,031,483
Revolving Loans Converted to Term Loans	654		654		1,173
Total Loans	2,087,308		2,087,308		2,122,592
Commercial | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	193		193		8
Term Loans by Year of Origination or Renewal, Year 2	8,562		8,562		14,790
Term Loans by Year of Origination or Renewal, Year 3	10,223		10,223		155
Term Loans by Year of Origination or Renewal, Year 4	129		129		188
Term Loans by Year of Origination or Renewal, Year 5	95		95		1,812
Term Loans by Year of Origination or Renewal, Prior	9,485		9,485		7,934
Revolving Loans	15,943		15,943		8,216
Revolving Loans Converted to Term Loans	0		0		5,907
Total Loans	44,630		44,630		39,010
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	206		206		234
Term Loans by Year of Origination or Renewal, Year 2	0		0		4,821
Term Loans by Year of Origination or Renewal, Year 3	14,417		14,417		101
Term Loans by Year of Origination or Renewal, Year 4	89		89		1,485
Term Loans by Year of Origination or Renewal, Year 5	3,032		3,032		0
Term Loans by Year of Origination or Renewal, Prior	207		207		144
Revolving Loans	5,885		5,885		8,646
Revolving Loans Converted to Term Loans	1,151		1,151		20
Total Loans	24,987		24,987		15,451
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	7,501		7,501		394
Term Loans by Year of Origination or Renewal, Year 2	7,934		7,934		35,950
Term Loans by Year of Origination or Renewal, Year 3	20,885		20,885		398
Term Loans by Year of Origination or Renewal, Year 4	326		326		9,191
Term Loans by Year of Origination or Renewal, Year 5	2,753		2,753		55
Term Loans by Year of Origination or Renewal, Prior	1,018		1,018		7,037
Revolving Loans	7,074		7,074		10,840
Revolving Loans Converted to Term Loans	3,616		3,616		41
Total Loans	51,107		51,107		63,906
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Commercial | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Mortgage warehouse purchase loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	442,302		442,302		312,099
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	442,302		442,302		312,099
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			0
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs			0
Mortgage warehouse purchase loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	442,302		442,302		312,099
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	442,302		442,302		312,099
Mortgage warehouse purchase loans | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Real estate | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	710,467		710,467		2,756,304
Term Loans by Year of Origination or Renewal, Year 2	2,733,690		2,733,690		2,087,779
Term Loans by Year of Origination or Renewal, Year 3	2,065,073		2,065,073		1,041,148
Term Loans by Year of Origination or Renewal, Year 4	982,449		982,449		650,390
Term Loans by Year of Origination or Renewal, Year 5	593,497		593,497		519,217
Term Loans by Year of Origination or Renewal, Prior	931,811		931,811		694,177
Revolving Loans	67,206		67,206		59,184
Revolving Loans Converted to Term Loans	4,590		4,590		9,248
Total Loans	8,088,783		8,088,783		7,817,447
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			0
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	0	1,187	0	4,159
Real estate | Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	670,557		670,557		2,652,298
Term Loans by Year of Origination or Renewal, Year 2	2,606,179		2,606,179		1,980,631
Term Loans by Year of Origination or Renewal, Year 3	1,933,507		1,933,507		998,910
Term Loans by Year of Origination or Renewal, Year 4	928,564		928,564		617,664
Term Loans by Year of Origination or Renewal, Year 5	556,398		556,398		448,758
Term Loans by Year of Origination or Renewal, Prior	858,411		858,411		640,275
Revolving Loans	67,205		67,205		59,184
Revolving Loans Converted to Term Loans	4,239		4,239		9,222
Total Loans	7,625,060		7,625,060		7,406,942
Real estate | Commercial Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	16,468		16,468		90,313
Term Loans by Year of Origination or Renewal, Year 2	65,784		65,784		25,954
Term Loans by Year of Origination or Renewal, Year 3	55,831		55,831		33,664
Term Loans by Year of Origination or Renewal, Year 4	44,754		44,754		18,678
Term Loans by Year of Origination or Renewal, Year 5	20,893		20,893		53,469
Term Loans by Year of Origination or Renewal, Prior	59,370		59,370		25,831
Revolving Loans	1		1		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	263,101		263,101		247,909
Real estate | Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	10,664		10,664		10,180
Term Loans by Year of Origination or Renewal, Year 2	33,000		33,000		41,193
Term Loans by Year of Origination or Renewal, Year 3	21,079		21,079		0
Term Loans by Year of Origination or Renewal, Year 4	4,333		4,333		10,870
Term Loans by Year of Origination or Renewal, Year 5	12,508		12,508		8,722
Term Loans by Year of Origination or Renewal, Prior	6,916		6,916		10,735
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	351		351		26
Total Loans	88,851		88,851		81,726
Real estate | Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	12,778		12,778		3,513
Term Loans by Year of Origination or Renewal, Year 2	28,727		28,727		40,001
Term Loans by Year of Origination or Renewal, Year 3	54,656		54,656		8,574
Term Loans by Year of Origination or Renewal, Year 4	4,798		4,798		3,178
Term Loans by Year of Origination or Renewal, Year 5	3,698		3,698		8,268
Term Loans by Year of Origination or Renewal, Prior	7,114		7,114		17,336
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	111,771		111,771		80,870
Real estate | Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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	313,351		313,351		562,753
Term Loans by Year of Origination or Renewal, Year 2	461,052		461,052		468,760
Term Loans by Year of Origination or Renewal, Year 3	266,248		266,248		137,001
Term Loans by Year of Origination or Renewal, Year 4	80,111		80,111		10,487
Term Loans by Year of Origination or Renewal, Year 5	7,031		7,031		23,073
Term Loans by Year of Origination or Renewal, Prior	15,679		15,679		12,274
Revolving Loans	13,330		13,330		12,705
Revolving Loans Converted to Term Loans	75		75		4,018
Total Loans	1,156,877		1,156,877		1,231,071
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			1,196
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	0	0	1,196	0
Real estate | Commercial Construction, Land and Land Development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	297,204		297,204		553,376
Term Loans by Year of Origination or Renewal, Year 2	447,008		447,008		465,272
Term Loans by Year of Origination or Renewal, Year 3	244,936		244,936		126,704
Term Loans by Year of Origination or Renewal, Year 4	72,496		72,496		10,477
Term Loans by Year of Origination or Renewal, Year 5	7,031		7,031		23,073
Term Loans by Year of Origination or Renewal, Prior	15,607		15,607		12,188
Revolving Loans	13,329		13,329		12,705
Revolving Loans Converted to Term Loans	75		75		4,018
Total Loans	1,097,686		1,097,686		1,207,813
Real estate | Commercial Construction, Land and Land Development | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	11,294		11,294		8,036
Term Loans by Year of Origination or Renewal, Year 2	14,018		14,018		43
Term Loans by Year of Origination or Renewal, Year 3	34		34		10,297
Term Loans by Year of Origination or Renewal, Year 4	7,151		7,151		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	61		61		72
Revolving Loans	1		1		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	32,559		32,559		18,448
Real estate | Commercial Construction, Land and Land Development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	4,853		4,853		1,313
Term Loans by Year of Origination or Renewal, Year 2	0		0		674
Term Loans by Year of Origination or Renewal, Year 3	21,278		21,278		0
Term Loans by Year of Origination or Renewal, Year 4	464		464		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	26,595		26,595		1,987
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	0		0		28
Term Loans by Year of Origination or Renewal, Year 2	26		26		2,771
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		10
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	11		11		14
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	37		37		2,823
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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Real estate | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	134,198		134,198		528,979
Term Loans by Year of Origination or Renewal, Year 2	510,207		510,207		381,162
Term Loans by Year of Origination or Renewal, Year 3	368,022		368,022		221,257
Term Loans by Year of Origination or Renewal, Year 4	226,214		226,214		158,122
Term Loans by Year of Origination or Renewal, Year 5	144,301		144,301		79,740
Term Loans by Year of Origination or Renewal, Prior	186,644		186,644		162,408
Revolving Loans	64,809		64,809		59,953
Revolving Loans Converted to Term Loans	501		501		1,238
Total Loans	1,634,896		1,634,896		1,592,859
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			0
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	0	0	0	6
Real estate | Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	133,726		133,726		525,631
Term Loans by Year of Origination or Renewal, Year 2	509,169		509,169		379,789
Term Loans by Year of Origination or Renewal, Year 3	367,164		367,164		220,077
Term Loans by Year of Origination or Renewal, Year 4	222,789		222,789		155,460
Term Loans by Year of Origination or Renewal, Year 5	141,320		141,320		79,437
Term Loans by Year of Origination or Renewal, Prior	180,665		180,665		154,875
Revolving Loans	64,676		64,676		59,332
Revolving Loans Converted to Term Loans	236		236		1,238
Total Loans	1,619,745		1,619,745		1,575,839
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		373
Term Loans by Year of Origination or Renewal, Year 2	363		363		918
Term Loans by Year of Origination or Renewal, Year 3	840		840		642
Term Loans by Year of Origination or Renewal, Year 4	2,919		2,919		1,743
Term Loans by Year of Origination or Renewal, Year 5	1,690		1,690		76
Term Loans by Year of Origination or Renewal, Prior	1,936		1,936		3,312
Revolving Loans	85		85		302
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	7,833		7,833		7,366
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		2,267
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		700
Term Loans by Year of Origination or Renewal, Year 5	1,075		1,075		227
Term Loans by Year of Origination or Renewal, Prior	1,028		1,028		1,224
Revolving Loans	0		0		126
Revolving Loans Converted to Term Loans	265		265		0
Total Loans	2,368		2,368		4,544
Real estate | Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	472		472		708
Term Loans by Year of Origination or Renewal, Year 2	675		675		455
Term Loans by Year of Origination or Renewal, Year 3	18		18		538
Term Loans by Year of Origination or Renewal, Year 4	506		506		219
Term Loans by Year of Origination or Renewal, Year 5	216		216		0
Term Loans by Year of Origination or Renewal, Prior	3,015		3,015		2,997
Revolving Loans	48		48		193
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	4,950		4,950		5,110
Real estate | Residential Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Real estate | Single-family interim construction
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	218,283		218,283		367,502
Term Loans by Year of Origination or Renewal, Year 2	189,682		189,682		105,762
Term Loans by Year of Origination or Renewal, Year 3	25,392		25,392		18,885
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		241
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	57,694		57,694		16,449
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	491,051		491,051		508,839
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			0
Term Loans by Year of Origination or Renewal, Year 3 write-offs			0
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	0	0	0	0
Real estate | Single-family interim construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	215,748		215,748		351,031
Term Loans by Year of Origination or Renewal, Year 2	188,763		188,763		105,573
Term Loans by Year of Origination or Renewal, Year 3	25,203		25,203		18,885
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		241
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	57,693		57,693		16,447
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	487,407		487,407		492,177
Real estate | Single-family interim construction | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	2,535		2,535		16,471
Term Loans by Year of Origination or Renewal, Year 2	919		919		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	1		1		2
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	3,455		3,455		16,473
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		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		189
Term Loans by Year of Origination or Renewal, Year 3	189		189		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	189		189		189
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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		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		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	14,127		14,127		55,225
Term Loans by Year of Origination or Renewal, Year 2	48,557		48,557		24,743
Term Loans by Year of Origination or Renewal, Year 3	22,843		22,843		13,875
Term Loans by Year of Origination or Renewal, Year 4	11,776		11,776		3,705
Term Loans by Year of Origination or Renewal, Year 5	3,529		3,529		5,847
Term Loans by Year of Origination or Renewal, Prior	11,749		11,749		8,892
Revolving Loans	9,302		9,302		12,135
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	121,883		121,883		124,422
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			5
Term Loans by Year of Origination or Renewal, Year 3 write-offs			1
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	6	0	6	0
Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	14,127		14,127		52,525
Term Loans by Year of Origination or Renewal, Year 2	46,282		46,282		24,743
Term Loans by Year of Origination or Renewal, Year 3	22,843		22,843		13,875
Term Loans by Year of Origination or Renewal, Year 4	11,776		11,776		3,705
Term Loans by Year of Origination or Renewal, Year 5	3,529		3,529		5,847
Term Loans by Year of Origination or Renewal, Prior	11,730		11,730		8,872
Revolving Loans	9,302		9,302		10,588
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	119,589		119,589		120,155
Agricultural | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		2,700
Term Loans by Year of Origination or Renewal, Year 2	2,275		2,275		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		1,547
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	2,275		2,275		4,247
Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	19		19		20
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	19		19		20
Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Agricultural | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	5,416		5,416		7,715
Term Loans by Year of Origination or Renewal, Year 2	4,388		4,388		4,913
Term Loans by Year of Origination or Renewal, Year 3	3,542		3,542		7,959
Term Loans by Year of Origination or Renewal, Year 4	8,313		8,313		1,576
Term Loans by Year of Origination or Renewal, Year 5	1,320		1,320		300
Term Loans by Year of Origination or Renewal, Prior	179		179		91
Revolving Loans	56,323		56,323		59,113
Revolving Loans Converted to Term Loans	99		99		0
Total Loans	79,580		79,580		81,667
Term Loans by Year of Origination or Renewal, Current write-offs			0
Term Loans by Year of Origination or Renewal, Year 2 write-offs			9
Term Loans by Year of Origination or Renewal, Year 3 write-offs			0
Term Loans by Year of Origination or Renewal, Year 4 write-offs			0
Term Loans by Year of Origination or Renewal, Year 5 write-offs			0
Term Loans by Year of Origination or Renewal, Prior write-offs			0
Revolving Loans write-offs			0
Revolving Loans Converted to Term Loans write-offs			0
Total write-offs	0	$ 0	9	$ 10
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	5,416		5,416		7,715
Term Loans by Year of Origination or Renewal, Year 2	4,082		4,082		4,909
Term Loans by Year of Origination or Renewal, Year 3	1,623		1,623		7,959
Term Loans by Year of Origination or Renewal, Year 4	8,313		8,313		1,576
Term Loans by Year of Origination or Renewal, Year 5	1,320		1,320		300
Term Loans by Year of Origination or Renewal, Prior	175		175		81
Revolving Loans	56,323		56,323		59,113
Revolving Loans Converted to Term Loans	99		99		0
Total Loans	77,351		77,351		81,653
Consumer | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	306		306		0
Term Loans by Year of Origination or Renewal, Year 3	1,917		1,917		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	2,223		2,223		0
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		4
Term Loans by Year of Origination or Renewal, Year 3	2		2		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	4		4		10
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	6		6		14
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	0		0		0
Consumer | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination or Renewal, Current	0		0		0
Term Loans by Year of Origination or Renewal, Year 2	0		0		0
Term Loans by Year of Origination or Renewal, Year 3	0		0		0
Term Loans by Year of Origination or Renewal, Year 4	0		0		0
Term Loans by Year of Origination or Renewal, Year 5	0		0		0
Term Loans by Year of Origination or Renewal, Prior	0		0		0
Revolving Loans	0		0		0
Revolving Loans Converted to Term Loans	0		0		0
Total Loans	$ 0		$ 0		$ 0

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Weighted average interest rate on advances (percent)	5.49%	2.42%
Outstanding balances of advances	$ 275,000	$ 300,000
Federal Home Loan Bank Stock	21,973
Loans pledged	6,654,177
Remaining credit facility under FHLB advances	4,924,806
Federal Home Loan Bank Advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Undisbursed advance commitments (letter of credit)	$ 1,443,300

Other Borrowings (Details)

Other Borrowings (Details) - USD ($)	Mar. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Other borrowings		$ 271,666,000	$ 267,066,000
5.00% Subordinated Debenture Notes Due December 31, 2027
Debt Instrument [Line Items]
Repayments of Subordinated Debt	$ 30,000,000
Stated interest rate (percent)	5%
Revolving Line of Credit | Line of Credit | Line of Credit
Debt Instrument [Line Items]
Borrowings against line of credit		$ (33,750,000)	$ 0

Off-Balance Sheet Arrangement_3

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 2,946,250	$ 3,315,544
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	2,917,204	3,291,409
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 29,046	$ 24,135

Off-Balance Sheet Arrangement_4

Off-Balance Sheet Arrangements, Commitments and Contingencies - Allowance for Off-Balance Sheet Credit Exposure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 4,907	$ 4,731	$ 3,944	$ 4,722
Provision for off-balance sheet credit exposure	(542)	(420)	421	(411)
Balance at end of period	$ 4,365	$ 4,311	$ 4,365	$ 4,311

Off-Balance Sheet Arrangement_5

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 07, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Loss Contingencies [Line Items]
Litigation settlement		$ 0	$ 0	$ 102,500	$ 0
Settlement agreement
Loss Contingencies [Line Items]
Litigation settlement	$ 100,000,000
Legal fees	$ 2,500,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense for the period	$ 8,246	$ 13,481	$ 5,662	$ 39,351
Effective tax rate (percent)	20.10%	20.50%	16.70%	20.20%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 1,545,904,000	$ 1,691,784,000
Loans held for sale, fair value option	10,499,000	10,612,000
Aggregate principal balance of loans held for sale	10,272,000	10,330,000
Loans held for sale, 90 days or greater past due	0
Loans held for sale, non-accrual	0
Designated as Hedging Instrument | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	11,583,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	11,583,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	0	0
Designated as Hedging Instrument | Interest Rate Swap | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	11,583,000	11,283,000
Designated as Hedging Instrument | Interest Rate Swap | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	10,499,000	10,612,000
Not designated as hedging | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	0	0
Not designated as hedging | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	10,499,000	10,612,000
Not designated as hedging | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Loans held for sale, fair value option	0	0
Not designated as hedging | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	353,000	294,000
Derivative financial instruments - Liabilities	0	6,000
Not designated as hedging | Interest rate lock commitments | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	353,000	294,000
Derivative financial instruments - Liabilities		6,000
Not designated as hedging | Interest rate lock commitments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities		0
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	353,000	294,000
Derivative financial instruments - Liabilities		6,000
Not designated as hedging | Interest rate lock commitments | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities		0
Not designated as hedging | Forward mortgage-backed securities trades
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	71,000	98,000
Derivative financial instruments - Liabilities	13,000	11,000
Not designated as hedging | Forward mortgage-backed securities trades | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	71,000	98,000
Derivative financial instruments - Liabilities	13,000	11,000
Not designated as hedging | Forward mortgage-backed securities trades | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Forward mortgage-backed securities trades | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	71,000	98,000
Derivative financial instruments - Liabilities	13,000	11,000
Not designated as hedging | Forward mortgage-backed securities trades | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Assets	0	0
Derivative financial instruments - Liabilities	0	0
Not designated as hedging | Interest Rate Swap | Loan customer counterparty | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - Liabilities	14,176,000	13,788,000
Not designated as hedging | Interest Rate Swap | Loan customer counterparty | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - 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 - Liabilities	14,176,000	13,788,000
Not designated as hedging | Interest Rate Swap | Loan customer counterparty | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative financial instruments - 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	14,331,000	13,968,000
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
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	14,331,000	13,968,000
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
U.S. treasuries
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	216,468,000	239,410,000
U.S. treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	216,468,000	239,410,000
U.S. treasuries | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
U.S. treasuries | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	216,468,000	239,410,000
U.S. treasuries | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Government agency securities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	374,092,000	384,515,000
Government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	374,092,000	384,515,000
Government agency securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Government agency securities | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	374,092,000	384,515,000
Government agency securities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Obligations of state and municipal subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	224,702,000	251,231,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	224,702,000	251,231,000
Obligations of state and municipal subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Obligations of state and municipal subdivisions | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	224,702,000	251,231,000
Obligations of state and municipal subdivisions | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	35,437,000	37,205,000
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	35,437,000	37,205,000
Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Corporate bonds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	35,437,000	37,205,000
Corporate bonds | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	694,705,000	778,473,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	694,705,000	778,473,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	694,705,000	778,473,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Other securities
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	500,000	950,000
Other securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	500,000	950,000
Other securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	0	0
Other securities | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	500,000	950,000
Other securities | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Securities available for sale	$ 0	$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and Liabilities at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 33,246	$ 34,473
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	5,359	8,527
Other real estate owned	22,505	23,900
Fair Value, Measurements, Nonrecurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	3,552	3,505
Fair Value, Measurements, Nonrecurring | Other real estate owned
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	3,037	3,548
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	5,359	8,527
Other real estate owned	$ 22,505	$ 23,900

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	Sep. 30, 2023 Rate
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling And Closing Costs For Loans As A Percentage Of Appraised Value	5%
Selling And Closing Costs For Other Real Estate Owned As A Percentage Of Appraised Value	5%
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling And Closing Costs For Loans As A Percentage Of Appraised Value	8%
Selling And Closing Costs For Other Real Estate Owned As A Percentage Of Appraised Value	8%

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial assets:
Investment securities held to maturity	$ 148,501
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	2,946,250	$ 3,315,544
Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	2,917,204	3,291,409
Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	29,046	24,135
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	711,709	654,322
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0	0
Loans held for sale, at cost	0	0
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	241	486
Investment securities held to maturity	148,501	162,239
Loans held for sale, at cost	7,734	710
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	25,496	23,436
Accrued interest receivable	58,780	59,214
Financial liabilities:
Deposits	15,296,064	15,063,025
Accrued interest payable	34,546	9,604
FHLB advances	275,014	246,519
Other borrowings	253,625	258,800
Junior subordinated debentures	58,789	53,969
Significant Other Observable Inputs (Level 2) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0	0
Loans held for sale, at cost	0	0
Loans, net	13,824,742	13,450,582
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Significant Unobservable Inputs (Level 3) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount
Financial assets:
Cash and cash equivalents	711,709	654,322
Certificates of deposit held in other banks	248	496
Investment securities held to maturity	205,689	207,059
Loans held for sale, at cost	7,569	698
Loans, net	14,075,155	13,760,576
FHLB of Dallas stock and other restricted stock	25,496	23,436
Accrued interest receivable	58,780	59,214
Financial liabilities:
Deposits	15,340,969	15,121,417
Accrued interest payable	34,546	9,604
FHLB advances	275,000	300,000
Other borrowings	271,666	267,066
Junior subordinated debentures	54,568	54,419
Carrying Amount | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value
Financial assets:
Cash and cash equivalents	711,709	654,322
Certificates of deposit held in other banks	241	486
Investment securities held to maturity	148,501	162,239
Loans held for sale, at cost	7,734	710
Loans, net	13,824,742	13,450,582
FHLB of Dallas stock and other restricted stock	25,496	23,436
Accrued interest receivable	58,780	59,214
Financial liabilities:
Deposits	15,296,064	15,063,025
Accrued interest payable	34,546	9,604
FHLB advances	275,014	246,519
Other borrowings	253,625	258,800
Junior subordinated debentures	58,789	53,969
Estimated Fair Value | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) derivative	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) derivative	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Number of interest rate derivatives instruments entered into | derivative	2		2
Unrealized losses arising during the period, net of tax	$ (1,359,000)	$ (3,214,000)	$ (2,644,000)	$ (8,760,000)
Reclassification of amount of losses recognized into income, net of tax	879,000	$ 254,000	2,395,000	$ 62,000
Cash collateral pledged for derivatives	11,462,000		11,462,000		$ 10,394,000
Securities collateral pledged for derivatives	449,000		449,000		509,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	3,550,000		3,550,000
Interest Rate Swap | Loan customer counterparty
Derivative [Line Items]
Credit exposure limited to the net favorable value of all swaps	$ 14,331,000		$ 14,331,000		13,968,000
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	$ 8,877,000		$ 8,877,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative notional amount	100,000,000		100,000,000		$ 100,000,000
Cash flow hedge gain (loss), net to be reclassified during next 12 months	$ 4,320,000		$ 4,320,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Balances and Fair Values of Outstanding Positions (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Outstanding Notional Balance	$ 100,000	$ 100,000
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	11,583	11,283
Not designated as hedging | Interest Rate Swap | Commercial Loan | Loan customer counterparty
Derivative [Line Items]
Outstanding Notional Balance	202,915	183,183
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	14,176	13,788
Not designated as hedging | Interest Rate Swap | Commercial Loan | Financial institution counterparty
Derivative [Line Items]
Outstanding Notional Balance	202,915	183,183
Asset Derivative Fair Value	14,331	13,968
Liability Derivative Fair Value	0	0
Not designated as hedging | Interest rate lock commitments
Derivative [Line Items]
Outstanding Notional Balance	20,111	15,476
Asset Derivative Fair Value	353	294
Liability Derivative Fair Value	0	6
Not designated as hedging | Forward mortgage-backed securities trades
Derivative [Line Items]
Outstanding Notional Balance	21,000	18,500
Asset Derivative Fair Value	71	98
Liability Derivative Fair Value	$ 13	$ 11

Derivative Financial Instrume_5

Derivative Financial Instruments - Schedule of Weighted Average Interest Rates (Details) - Commercial Loan - Not designated as hedging - Loan customer counterparty - Interest Rate Swap	Sep. 30, 2023	Dec. 31, 2022
Interest Rate Received
Derivative [Line Items]
Weighted Average Interest Rate received	4.53%	4.12%
Interest Rate Paid
Derivative [Line Items]
Weighted Average Interest Rate Paid	7.86%	6.72%

Derivative Financial Instrume_6

Derivative Financial Instruments - Income (Loss) on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ (1,119)	$ (326)	$ (3,048)	$ (93)
Interest rate lock commitments | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	5	(544)	65	(957)
Forward mortgage-backed securities trades | Not designated as hedging
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative	$ (33)	$ 470	$ (29)	$ 458

Stock Awards - Additional Infor

Stock Awards - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 2,112	$ 2,610	$ 6,176	$ 7,178
Estimated future compensation expense		12,982		$ 12,982
Period for recognition				2 years 21 days
Fair value of common stock awards vested				$ 7,497	11,822
Stock based compensation expense				$ 5,572	$ 9,600
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)				136,909	111,095
Excess tax expense (benefits) on vested restricted stock		120	(321)	$ 216	$ (673)
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (in shares)				37,938	20,742
Period for recognition				2 years 21 days
Stock based compensation expense		(1,689)	$ 1,169	$ (604)	$ 2,422
Unrecognized compensation expense		$ 3,160		$ 3,160
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)		1,365,752		1,365,752
2022 Equity Incentive Plan | Minimum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				1 year
2022 Equity Incentive Plan | Minimum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				3 years
Stock based compensation, award vesting percentage				0%
2022 Equity Incentive Plan | Maximum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				5 years
2022 Equity Incentive Plan | Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period				4 years
Stock based compensation, award vesting percentage				150%

Stock Awards - Nonvested Restri

Stock Awards - Nonvested Restricted Stock Awards Activity (Details) - Restricted Stock - $ / shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Number of Shares
Nonvested shares, beginning balance (shares)	309,015	363,551
Granted during the period (shares)	136,909	111,095
Vested during the period (shares)	(144,677)	(161,936)
Forfeited during the period (shares)	(4,844)	(7,301)
Nonvested shares, ending balance (shares)	296,403	305,409
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 60.12	$ 53.14
Granted during the period (usd per share)	56.99	72.55
Vested during the period (usd per share)	58.64	53.83
Forfeited during the period (usd per share)	62.81	55.06
Nonvested shares, ending balance (usd per share)	$ 59.36	$ 59.79

Stock Awards - Future Vesting S

Stock Awards - Future Vesting Schedule of Nonvested Shares (Details)	Sep. 30, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	296,403
First year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	151,166
Second year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	80,278
Third year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	56,411
Fourth year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares (shares)	8,548

Stock Awards - Schedule of Nonv

Stock Awards - Schedule of Nonvested Restricted Stock Awards (Details) - Performance stock units - $ / shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Number of Shares
Nonvested shares, beginning balance (shares)	140,240	114,498
Granted during the period (shares)	37,938	20,742
Nonvested shares, ending balance (shares)	178,178	135,240
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 49.20	$ 43.93
Granted during the period (usd per share)	60.21	73.94
Nonvested shares, ending balance (usd per share)	$ 51.55	$ 48.53

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Consolidated
Total capital to risk weighted assets:
Actual Amount	$ 1,879,020	$ 1,936,363
Actual Ratio (percent)	0.1189	0.1235
Minimum capital required plus capital conservation buffer amount	$ 1,659,872	$ 1,645,772
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,580,830	$ 1,567,402
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,614,462	$ 1,637,191
Actual Ratio (percent)	0.1021	0.1045
Minimum capital required plus capital conservation buffer amount	$ 1,343,706	$ 1,332,291
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 948,498	$ 940,441
Required to be considered well capitalized (percent)	0.0600	0.0600
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,558,862	$ 1,581,591
Actual ratio (percent)	0.0986	0.1009
Minimum capital required plus capital conservation buffer amount	$ 1,106,581	$ 1,097,181
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Tier 1 capital to average assets:
Actual Amount	$ 1,614,462	$ 1,637,191
Actual Ratio (percent)	0.0909	0.0949
Minimum capital required plus capital conservation buffer amount	$ 710,397	$ 690,309
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Bank
Total capital to risk weighted assets:
Actual Amount	$ 2,011,879	$ 2,013,874
Actual Ratio (percent)	0.1273	0.1285
Minimum capital required plus capital conservation buffer amount	$ 1,659,341	$ 1,645,236
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,580,324	$ 1,566,891
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,877,321	$ 1,896,702
Actual Ratio (percent)	0.1188	0.1210
Minimum capital required plus capital conservation buffer amount	$ 1,343,276	$ 1,331,858
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 1,264,259	$ 1,253,513
Required to be considered well capitalized (percent)	0.0800	0.0800
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,877,321	$ 1,896,702
Actual ratio (percent)	0.1188	0.1210
Minimum capital required plus capital conservation buffer amount	$ 1,106,227	$ 1,096,824
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Required to be considered well capitalized amount	$ 1,027,211	$ 1,018,479
Required to be considered well capitalized (percent)	0.0650	0.0650
Tier 1 capital to average assets:
Actual Amount	$ 1,877,321	$ 1,896,702
Actual Ratio (percent)	0.1057	0.1099
Minimum capital required plus capital conservation buffer amount	$ 710,202	$ 690,130
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Required to be considered well capitalized amount	$ 887,753	$ 862,663
Required to be considered well capitalized (percent)	0.0500	0.0500

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jan. 31, 2023
Regulatory Assets [Line Items]
Share repurchase program, period			1 year
Common stock repurchased	$ 418,000	$ 1,054,000	$ 2,057,000	$ 119,165,000
Common stock purchased to settle employee tax withholding related to vesting of stock awards (shares)	11,476	15,311	38,739	43,786
Common stock purchased to settle employee tax withholding related to vesting of stock awards	$ 418,000	$ 1,054,000	$ 2,057,000	$ 3,199,000
2022 Share Repurchase Program
Regulatory Assets [Line Items]
Common stock repurchased (shares)				1,651,236
Common stock repurchased		$ 0		$ 115,966,000
2023 Share Repurchase Program
Regulatory Assets [Line Items]
Share repurchase program authorized amount					$ 125,000,000
Common stock repurchased (shares)	0		0

Subsequent Event (Details)

Subsequent Event (Details)	Oct. 19, 2023 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.38