First Financial Bankshares (FFIN) 10-K 22 Feb 23 2022 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Feb. 22, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	Dec. 31, 2022
Entity Registrant Name	First Financial Bankshares, Inc.
Entity Central Index Key	0000036029
Entity Filer Category	Large Accelerated Filer
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity File Number	0-07674
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	75-0944023
Entity Address, Address Line One	400 Pine Street
Entity Address, City or Town	Abilene
Entity Address, State or Province	TX
City Area Code	325
Local Phone Number	627-7155
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FFIN
Security Exchange Name	NASDAQ
Entity Address, Postal Zip Code	79601
Entity Common Stock, Shares Outstanding		142,701,017
Entity Public Float			$ 5,370
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	Certain information required by Part III is incorporated by reference to the proxy statement for our 2023 annual meeting of shareholders, which will be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2022 .
Auditor Location	Fort Worth, Texas
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
ASSETS
CASH AND DUE FROM BANKS	$ 293,286,000	$ 205,053,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	37,392,000	323,535,000
Total cash and cash equivalents	330,678,000	528,588,000
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of these securities was $6,152.348 and $6,447,510 as of December 31, 2022 and 2021, respectively)	5,474,359,000	6,573,179,000
LOANS:
Held-for-investment, excluding PPP loans	6,441,699,000	5,336,179,000
PPP loans	169,000	52,793,000
Total loans held-for-investment	6,441,868,000	5,388,972,000
Less - allowance for credit losses	(75,834,000)	(63,465,000)
Net loans held – for -investment	6,366,034,000	5,325,507,000
Held-for-sale ($10,497 and $34,122 at fair value as of December 31, 2022 and 2021, respectively)	11,965,000	37,810,000
BANK PREMISES AND EQUIPMENT, net	152,973,000	149,764,000
INTANGIBLE ASSETS, net	315,534,000	316,779,000
OTHER ASSETS	322,523,000	170,834,000
Total assets	12,974,066,000	13,102,461,000
LIABILITIES AND SHAREHOLDERS’ EQUITY
NONINTEREST-BEARING DEPOSITS	4,061,788,000	3,780,230,000
INTEREST-BEARING DEPOSITS	6,943,719,000	6,786,258,000
Total deposits	11,005,507,000	10,566,488,000
DIVIDENDS PAYABLE	24,278,000	21,388,000
BORROWINGS	642,507,000	671,152,000
OTHER LIABILITIES	36,037,000	84,209,000
Total liabilities	11,708,329,000	11,343,237,000
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
COMMON STOCK $0.01 par value; authorized 200,000,000 shares; 142,657,871 and 142,532,116 shares issued at December 31, 2022 and 2021, respectively	1,427,000	1,425,000
Capital surplus	677,593,000	676,871,000
Retained earnings	1,121,945,000	981,675,000
TREASURY STOCK (shares at cost: 929,210 and 936,897 at December 31, 2022 and 2021, respectively)	(11,035,000)	(10,090,000)
DEFERRED COMPENSATION	11,035,000	10,090,000
ACCUMULATED OTHER COMPREHENSIVE EARNINGS, net	(535,228,000)	99,253,000
Total shareholders’ equity	1,265,737,000	1,759,224,000
Total liabilities and shareholders’ equity	$ 12,974,066,000	$ 13,102,461,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Securities, Available-for-sale, Amortized Cost	$ 6,152,348	$ 6,447,510
Loans Held-for-sale, fair Value	$ 10,497	$ 34,122
Common stock, par value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares, Issued	142,657,871	142,532,116
Treasury stock, shares	929,210	936,897

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INTEREST INCOME:
Interest and fees on loans	$ 296,114	$ 271,638	$ 263,320
Interest on investment securities:
Taxable	78,924	47,390	51,456
Exempt from federal income tax	54,121	56,638	48,399
Interest on federal funds sold and interest-bearing deposits in banks	3,695	739	953
Total interest income	432,854	376,405	364,128
INTEREST EXPENSE:
Interest on deposits	26,246	5,705	13,118
Interest on borrowings	5,194	337	1,125
Total interest expense	31,440	6,042	14,243
Net interest income	401,414	370,363	349,885
PROVISION FOR CREDIT LOSSES	17,427	(1,139)	19,517
Net interest income after provisions for credit losses	383,987	371,502	330,368
NONINTEREST INCOME:
Trust fees	39,995	36,145	29,531
Service charges on deposit accounts	24,540	21,156	20,572
Debit card fees	30,280	35,905	30,298
Credit card fees	2,585	2,373	2,171
Gain on sale and fees on mortgage loans	19,035	33,245	43,872
Net gain on sale of available-for-sale securities	2,144	815	3,633
Net gain on sale of foreclosed assets	1,451	190	159
Net gain on sale of assets	520	210	112
Interest on loan recoveries	2,840	4,039	856
Other	8,275	8,098	8,731
Total noninterest income	131,665	142,176	139,935
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	134,133	142,042	135,123
Net occupancy expense	13,307	13,009	12,388
Equipment expense	9,052	9,173	8,396
FDIC insurance premiums	3,711	3,130	1,758
Debit card expense	12,231	11,957	11,215
Professional and service fees	8,770	9,334	9,346
Printing, stationery and supplies	2,114	1,910	2,163
Operational and other losses	3,229	3,293	2,462
Software amortization and expense	9,963	11,120	8,862
Amortization of intangible assets	1,245	1,613	1,990
Other	37,023	35,127	34,235
Total noninterest expense	234,778	241,708	227,938
EARNINGS BEFORE INCOME TAXES	280,874	271,970	242,365
INCOME TAX EXPENSE	46,399	44,408	40,331
NET EARNINGS	$ 234,475	$ 227,562	$ 202,034
NET EARNINGS PER SHARE, BASIC	$ 1.64	$ 1.60	$ 1.42
NET EARNINGS PER SHARE, DILUTED	1.64	1.59	1.42
DIVIDENDS PER SHARE	$ 0.66	$ 0.58	$ 0.51

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 234,475	$ 227,562	$ 202,034
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain (loss) on investment securities available-for sale, before income taxes	(800,997)	(89,238)	133,872
Reclassification adjustment for realized gains (loss) on investment securities included in net earnings, before income taxes	(2,144)	(815)	(3,633)
Total other items of comprehensive earnings (losses)	(803,141)	(90,053)	130,239
Income tax benefit (expense) related to:
Change in unrealized gain (loss) on investment securities available-for-sale	168,210	18,740	(28,113)
Reclassification adjustment for realized gains (loss) on investment securities included in net earnings	450	171	763
Other Comprehensive Income (Loss), Tax, Total	168,660	18,911	(27,350)
COMPREHENSIVE EARNINGS	$ (400,006)	$ 118,598	$ 304,923

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Capital Surplus [Member]	Capital Surplus [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Treasury Stock [Member]	Treasury Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Deferred Compensation [Member]	Deferred Compensation [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Accumulated Other Total Comprehensive Earnings, net [Member]	Accumulated Other Total Comprehensive Earnings, net [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Cumulative effect of adopting ASC 326 on January 1, 2020, net of related income taxes		$ (466)							$ (466)
Beginning Balance at Dec. 31, 2019	$ 1,227,197		$ 1,226,731	$ 1,359	$ 1,359	$ 450,676	$ 450,676	$ 707,656		$ 707,190	$ (8,222)	$ (8,222)	$ 8,222	$ 8,222	$ 67,506	$ 67,506
Beginning Balance, Shares at Dec. 31, 2019				135,891,755	135,891,755
Treasury Stock, Beginning Balance, Shares at Dec. 31, 2019											(927,408)	(927,408)
NET EARNINGS	202,034							202,034
Stock option exercises	4,717			$ 3		4,714
Stock option exercises, Shares				295,093
Restricted stock grant, net	672					672
Restricted stock grant net, Shares				24,214
Cash dividends declared	(72,495)							(72,495)
Stock issued in acquisition	220,273			$ 63		220,210
Stock issued in acquisition, Shares				6,275,574
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes	102,889														102,889
Shares purchased in connection with directors’ deferred compensation plan, net											$ (904)		904
Shares purchased in connection with directors’ deferred compensation plan, net, Shares											(11,183)
Stock option expense	1,377					1,377
Shares repurchased and retired under stock repurchase authorization	(8,008)			$ (3)		(8,005)
Shares repurchased and retired under stock repurchase authorization, shares				(324,802)
Ending Balance at Dec. 31, 2020	1,678,190			$ 1,422		669,644		836,729			$ (9,126)		9,126		170,395
Ending Balance, Shares at Dec. 31, 2020				142,161,834
Treasury Stock, Ending Balance, Shares at Dec. 31, 2020											(938,591)
NET EARNINGS	227,562							227,562
Stock option exercises	5,905			$ 3		5,902
Stock option exercises, Shares				345,829
Restricted stock grant, net	9					9
Restricted stock grant net, Shares				24,453
Cash dividends declared	(82,616)							(82,616)
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes	(71,142)														(71,142)
Shares purchased in connection with directors’ deferred compensation plan, net											$ (964)		964
Shares purchased in connection with directors’ deferred compensation plan, net, Shares											1,694
Stock option expense	1,316					1,316
Ending Balance at Dec. 31, 2021	$ 1,759,224			$ 1,425		676,871		981,675			$ (10,090)		10,090		99,253
Ending Balance, Shares at Dec. 31, 2021				142,532,116
Treasury Stock, Ending Balance, Shares at Dec. 31, 2021	936,897										(936,897)
NET EARNINGS	$ 234,475							234,475
Stock option exercises	6,545			$ 4		6,541
Stock option exercises, Shares				355,692
Restricted stock grant, net	2,188					2,188
Restricted stock grant net, Shares				14,622
Cash dividends declared	(94,205)							(94,205)
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes	(634,481)														(634,481)
Shares purchased in connection with directors’ deferred compensation plan, net											$ (945)		945
Shares purchased in connection with directors’ deferred compensation plan, net, Shares											7,687
Stock option expense	1,440					1,440
Shares repurchased and retired under stock repurchase authorization	(9,449)			$ (2)		(9,447)
Shares repurchased and retired under stock repurchase authorization, shares				(244,559)
Ending Balance at Dec. 31, 2022	$ 1,265,737			$ 1,427		$ 677,593		$ 1,121,945			$ (11,035)		$ 11,035		$ (535,228)
Ending Balance, Shares at Dec. 31, 2022				142,657,871
Treasury Stock, Ending Balance, Shares at Dec. 31, 2022	929,210										(929,210)

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash dividend per share	$ 0.66	$ 0.58	$ 0.51
Retained Earnings [Member]
Cash dividend per share	$ 0.66	$ 0.58	$ 0.51

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 234,475,000	$ 227,562,000	$ 202,034,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	12,762,000	13,061,000	12,793,000
Provision for credit losses	17,427,000	(1,139,000)	19,517,000
Securities premium amortization, net	70,788,000	68,308,000	41,959,000
Discount accretion on purchased loans	(1,492,000)	(2,362,000)	(3,780,000)
Gain on sale of assets, net	(4,115,000)	(1,217,000)	(4,001,000)
Deferred federal income tax (expense) benefit	(4,205,000)	3,531,000	(5,249,000)
Change in loans held-for-sale	25,194,000	44,098,000	(53,494,000)
Change in other assets	907,000	(11,308,000)	(23,233,000)
Change in other liabilities	(27,801,000)	12,697,000	24,122,000
Total adjustments	89,465,000	125,669,000	8,634,000
Net cash provided by operating activities	323,940,000	353,231,000	210,668,000
Activity in available-for-sale securities and other investments:
Sales	479,273,000	10,631,000	263,042,000
Maturities	4,132,928,000	8,495,614,000	6,075,017,000
Purchases	(4,385,683,000)	(10,887,727,000)	(7,117,151,000)
Net increase in loans held-for-investment	(1,049,925,000)	(211,786,000)	(529,144,000)
Purchases of bank premises and equipment	(15,784,000)	(19,205,000)	(16,450,000)
Proceeds from sale of bank premises and equipment and other assets	1,186,000	823,000	1,456,000
Net cash used in investing activities	(838,005,000)	(2,611,650,000)	(1,262,202,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in noninterest-bearing deposits	281,558,000	797,533,000	679,744,000
Net increase in interest-bearing deposits	157,461,000	1,093,138,000	843,142,000
Net increase (decrease) in borrowings	(28,645,000)	241,059,000	48,737,000
Common stock transactions:
Proceeds from stock option exercises	6,545,000	5,905,000	4,717,000
Dividends paid	(91,315,000)	(79,712,000)	(70,318,000)
Repurchase of stock	(9,449,000)	0	(8,008,000)
Net cash provided by financing activities	316,155,000	2,057,923,000	1,498,014,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(197,910,000)	(200,496,000)	446,480,000
CASH AND CASH EQUIVALENTS, beginning of year	528,588,000	729,084,000	282,604,000
CASH AND CASH EQUIVALENTS, end of year	330,678,000	528,588,000	729,084,000
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	30,540,000	6,198,000	14,494,000
Federal income taxes paid	45,430,000	39,528,000	44,381,000
Schedule of noncash investing and financing activities:
Assets acquired through foreclosure	0	2,711,000	164,000
Investment securities purchased but not settled	0	0	14,641,000
Restricted stock grant (forfeiture)	2,188,000	1,316,000	672,000
Stock issued in acquisition of TB&T Bancshares, Inc.	0	0	220,273,000
TB And T Bacshares Inc [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash received in acquisition, Net	$ 0	$ 0	$ 61,028,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Nature of Operations First Financial Bankshares, Inc. (a Texas corporation) (“Bankshares”, “Company”, “we” or “us”) is a financial holding company which owns all of the capital stock of one bank with 79 locations located in Texas as of December 31, 2022 . The Company’s subsidiary bank is First Financial Bank, N.A. The Company’s primary source of revenue is providing loans and banking services to consumers and commercial customers in the market area in which First Financial Bank, N.A. is located. In addition, the Company also owns First Financial Trust & Asset Management Company, N.A., First Financial Insurance Agency, Inc., First Technology Services, Inc. and FB Investment Paris Fund, LLC. Basis of Presentation A summary of significant accounting policies of the Company and its subsidiaries applied in the preparation of the accompanying consolidated financial statements follows. The accounting principles followed by the Company and the methods of applying them are in conformity with both United States generally accepted accounting principles (“GAAP”) and prevailing practices of the banking industry. The Company evaluated subsequent events for potential recognition through the date the consolidated financial statements were issued. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The Company’s significant estimates include its allowance for credit losses and its valuation of financial instruments. Consolidation The accompanying consolidated financial statements include the accounts of Bankshares and its subsidiaries, all of which are wholly-owned. All intercompany accounts and transactions have been eliminated. Stock Repurchase On July 27, 2021, the Company's Board of Directors authorized the repurchase of up to 5,000,000 common shares through July 31, 2023. Previously, the Company’s Board of Directors had authorized the repurchase of up to 4,000,000 common shares through September 30, 2021. The stock repurchase plan authorizes management to repurchase and retire the stock at such time as repurchases and retirements are considered beneficial to the Company and its stockholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through July 27, 2021, 324,802 shares were repurchased and retired (all during the months of March and April of 2020) at an average price of $ 24.75 under the previous repurchase plan. Subsequent to July 27, 2021 and through December 31, 2022 , 244,559 shares were repurchased and retired (all during the months of June and July of 2022) at an average price of $ 38.61 . Acquisition On January 1, 2020, the Company acquired 100 % of the outstanding capital stock of TB&T Bancshares, Inc. through the merger of a wholly-owned subsidiary with and into TB&T Bancshares, Inc. Following such merger, TB&T Bancshares, Inc. and its wholly-owned subsidiary, The Bank & Trust of Bryan/College Station, Texas were merged into the Company and First Financial Bank, N.A., respectively. The results of operations of TB&T Bancshares, Inc. subsequent to the acquisition date, are included in the consolidated earnings of the Company. See Note 19 for additional information. Adoption of New Accounting Standards On January 1, 2020, Accounting Standards Update (“ASU”) 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , became effective for the Company. Accounting Standards Codification (“ASC”) Topic 326 (“ASC 326”) replaced the previous “incurred loss” model for measuring credit losses with an expected loss methodology that is referred to as the current expected credit loss (“CECL”) methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to OBS credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). In addition, ASC 326 made changes to the accounting for available-for-sale debt securities. One such change is to require credit losses to be presented as an allowance rather than as a write-down on available-for-sale debt securities management does not intend to sell or believes that it is more likely than not they will be required to sell. On March 27, 2020, the CARES Act was signed by the President of the United States that included an option for entities to delay the implementation of ASC 326 until the earlier of the termination date of the national emergency declaration by the President, or December 31, 2020. Under this option, the Company elected to delay implementation of CECL and calculated and recorded the provision for credit losses through the nine-months ended September 30, 2020 under the incurred loss model. At December 31, 2020, the Company elected to adopt ASC 326, effective as of January 1, 2020, through a transition charge to retained earnings of $ 589,000 ($ 466,000 net of applicable income taxes). This transition adjustment was comprised of a decrease of $ 619,000 in allowance for credit losses and an increase of $ 1,208,000 in the reserve for unfunded commitments. With the adoption of ASC 326, we revised certain accounting policies and implemented certain accounting policy elections which are described below. Prior to January 1, 2020, allowance for credit losses were based on the incurred loss methodology in accordance with accounting policies disclosed in Note 1 of the Consolidated Financial Statements included in the Company’s 2019 Form 10-K. The Company adopted ASC 326 using the modified retrospective method for all financial assets measured at amortized cost, net investment in leases and OBS credit exposures. The Company adopted ASC 326 using the prospective transition approach for securities for which other-than-temporary impairment had been recognized prior to January 1, 2020. As a result, the amortized cost basis remains the same before and after the effective date of ASC 326. The effective interest rate on these debt securities was not changed. We did not have any securities for which OTTI had been recognized as of December 31, 2019. The Company adopted ASC 326 using the prospective transition approach for financial assets purchased with credit deterioration (“PCD”) that were previously classified as purchased credit impaired (“PCI”) and accounted for under ASC 310-30. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. For the periods ended December 31, 2022 and 2021 , amounts related to the Company’s PCD and PCI loans were insignificant and disclosures related to these balances have been omitted. Investment Securities Management classifies debt securities as held-to-maturity, available-for-sale, or trading based on its intent. Securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at amortized cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at fair value, with unrealized holding gains and losses (those for which no allowance for credit losses are recorded) reported as a component of other comprehensive income, net of tax. Management determines the appropriate classification of securities at the time of purchase. Interest income includes amortization of purchase premiums and discounts over the period to maturity using a level-yield method, except for premiums on callable securities, which are amortized to their earliest call date. Realized gains and losses are recorded on the sale of securities in noninterest income. The Company has made a policy election to exclude accrued interest from the amortized cost basis of securities and report accrued interest separately in other assets on the consolidated balance sheets. A security is placed on nonaccrual status at the time any principal or interest payments become more than 90 days delinquent or if full collection of interest or principal becomes uncertain. Accrued interest for a security placed on nonaccrual is reversed against interest income. There was no accrued interest related to securities reversed against interest income for the years ended December 31, 2022 or 2021. The Company records its available-for-sale securities portfolio at fair value. Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security. The Company’s investment portfolio currently consists of obligations of state and political subdivisions, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third-party pricing services to value its investment securities, which the Company reviews as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with pricing matrices. The Company validates prices supplied by the independent pricing services by comparison to prices obtained from other third-party sources on a quarterly basis. Allowance for Credit Losses – Available-for-Sale Securities For available-for-sale securities in an unrealized loss position, we first assess whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, any previously recognized allowances are charged-off and the security’s amortized cost basis is written down to fair value through income as a provision for credit losses. For available-for-sale securities that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Management has made the accounting policy election to exclude accrued interest receivable on available-for-sale securities from the estimate of credit losses. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit losses. Available-for-sale securities are charged-off against the allowance or, in the absence of any allowance, written down through income when deemed uncollectible by management or when either of the aforementioned criteria regarding intent or requirement to sell is met. Prior to the adoption of ASC 326, declines in the fair value of securities below their cost that were deemed to be other-than-temporary were reflected in earnings as realized losses. In estimating other-than-temporary impairment losses prior to January 1, 2020, management considered, among other things, the length of time and the extent to which the fair value had been less than cost, the financial condition and near-term prospects of the issuer and the intent and our ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. At December 31, 2022 and 2021 , no allowance for credit losses - available-for-sale securities was recorded. Allowance for Credit Losses – Held-to-Maturity Securities The allowance for credit losses on held-to-maturity securities is a contra-asset valuation account, calculated in accordance with ASC 326, that is deducted from the amortized cost basis of held-to-maturity securities to present management’s best estimate of the net amount expected to be collected. Held-to-maturity securities are charged-off against the allowance when deemed uncollectible by management. Adjustments to the allowance are reported in our income statement as a component of credit loss expense. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type with each type sharing similar risk characteristics and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management has made the accounting policy election to exclude accrued interest receivable on held-to-maturity securities from the estimate of credit losses. At December 31, 2022 and 2021 , the Company held no securities that were classified as held-to-maturity. Loans Held-for-Investment Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost, net of the allowance for credit losses. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, fair value hedge accounting adjustments, deferred loan fees and costs. The Company has made a policy election to exclude accrued interest from the amortized cost basis of loans and report accrued interest separately from the related loan balance in other assets on the condensed consolidated balance sheets. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are placed on nonaccrual status when, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, as well as when required by regulatory provisions. In determining whether or not a borrower may be unable to meet payment obligations for each class of loans, we consider the borrower’s debt service capacity through the analysis of current financial information, if available, and/or current information with regards to our collateral position. Regulatory provisions would typically require the placement of a loan on nonaccrual status if 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 full payment of principal and interest is not expected. Loans may be placed on nonaccrual status regardless of whether or not such loans are considered past due. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income on nonaccrual loans is recognized only to the extent that cash payments are received in excess of principal due. A loan may be returned to accrual status when all the principal and interest amounts contractually due are brought current and future principal and interest amounts contractually due are reasonably assured. Prior to the adoption of ASC 326 on January 1, 2020, loans were reported as impaired when, based on then current information and events, it was probable we would be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. Impairment was evaluated in total for smaller-balance loans of a similar nature and on an individual loan basis for other loans. If a loan was impaired, a specific valuation allowance was allocated, if necessary, so that the loan was reported net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment was expected solely from the collateral. Interest payments on impaired loans were typically applied to principal unless collectability of the principal amount was reasonably assured, in which case interest was recognized on a cash basis. Impaired loans, or portions thereof, were charged off when deemed uncollectible. Further information regarding our accounting policies related to past due loans, nonaccrual loans and troubled-debt restructurings is presented in Note 3. Acquired Loans Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value. The allowance for credit losses related to the acquired loan portfolio is not carried over. Upon the adoption of ASC 326, acquired loans are classified into two categories based on the credit risk characteristics of the underlying borrowers as either purchased credit deteriorated (“PCD”) loans, or loans with no evidence of credit deterioration (“non-PCD”). PCD loans are defined as a loan or pool of loans that have experienced more-than-insignificant credit deterioration since the origination date. The Company uses a combination of individual and pooled review approaches to determine if acquired loans are PCD. At acquisition, the Company considers a number of factors to determine if an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. The initial allowance related to PCD loans that share similar risk characteristics is established using a pooled approach. The Company uses either a discounted cash flow or weighted average remaining life method to determine the required level of the allowance. PCD loans that were classified as nonaccrual as of the acquisition date and are collateral dependent are assessed for allowance on an individual basis. For PCD loans, an initial allowance for credit losses is established on the acquisition date. Subsequent to the acquisition date, the initial allowance for credit losses on PCD loans will increase or decrease based on future evaluations, with changes recognized in the provision for credit losses. Non-PCD loans are pooled into segments together with originated loans that share similar risk characteristics and have an allowance established on the acquisition date, which is recognized in the current period provision for credit losses as well as a fair value adjustment to the amortized cost of the loan and accreted into income over the life of the loan. Determining the fair value of the acquired loans involves estimating the principal and interest payment cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life, interest rate profile, market interest rate environment, payment schedules, risk ratings, probability of default and loss given default, and estimated prepayment rates. For PCD loans, the non-credit discount or premium is allocated to individual loans as determined by the difference between the loan’s unpaid principal balance and amortized cost basis. For non-PCD loans, the fair value discount or premium is allocated to individual loans and recognized into interest income on a level yield basis over the remaining expected life of the loan. Allowance for Credit Losses—Loans The allowance for credit losses (“allowance” or “ACL”) is a contra-asset valuation account, calculated in accordance with ASC 326, that is deducted from the amortized cost basis of loans. The ACL represents an amount which, in management’s judgement, is adequate to absorb the lifetime expected credit losses that may be experienced on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions and prepayment experience. The allowance for credit losses is measured and recorded upon the initial recognition of a financial asset. Determination of the adequacy of the allowance is inherently complex and requires the use of significant and highly subjective estimates. Loans are charged-off against the allowance when deemed uncollectible by management. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Adjustments to the allowance are reported in our income statement as a component of the provision for credit losses. Management has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses. The Company’s methodology for estimating the allowance includes: (1) a collective quantified reserve that reflects the Company’s historical default and loss experience adjusted for expected economic conditions throughout a reasonable and supportable period and the Company’s prepayment and curtailment rates; (2) collective qualitative factors that consider concentrations of the loan portfolio, expected changes to the economic forecasts, large relationships, early delinquencies, and factors related to credit administrations, including, among others, loan-to-value ratios, borrowers’ risk rating and credit score migrations; and (3) individual allowances on loans where borrowers are experiencing financial difficulty or when the Company determines that the foreclosure is probable. In calculating the allowance for credit losses, most loans are segmented into pools based upon similar characteristics and risk profiles. Common characteristics and risk profiles include the type/purpose of loan, underlying collateral, geographical similarity and historical/expected credit loss patterns. In developing these loan pools for the purposes of modeling expected credit losses, we also analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors. For modeling purposes, our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. We periodically reassess 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. Refer to Note 3 for more details on the Company’s portfolio segments. The Company applies two methodologies to estimate the allowance on its pooled portfolio segments; discounted cash flows method and weighted average remaining life method. Allowance estimates on the following portfolio segments are calculated using the discounted cash flows method: C&I, Municipal, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE and Residential. Allowance estimates on the following portfolio segments are calculated using the remaining life method: Agriculture, Consumer Auto and Consumer Non-Auto. The models related to these methodologies utilize the Company’s historical default and loss experience adjusted for future economic forecasts. The reasonable and supportable forecast period represents a one-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include; Texas unemployment rate, Texas house price index and Texas retail sales index. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience. In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within our loan pools. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk rating of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management’s assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. We reevaluate the fair value of collateral supporting collateral dependent loans on an ongoing basis. Management qualitatively adjusts model results for risk factors that are not considered within our modeling processes but are nonetheless relevant in assessing the expected credit losses within our 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. The various risks that may be considered in making Q-Factor adjustments include, among other things, the impact of (i) changes in lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries, (ii) actual and expected changes in national, regional, and local economic and business conditions and developments that affect the collectability of the loan pools, (iii) changes in the nature, volume and size of a loan or the loan pools and in the terms of the underlying loans, (iv) changes in the experience, ability, and depth of our lending management and staff, (v) changes in volume and severity of past due financial assets, the volume of nonaccrual assets, and the volume and severity of adversely classified or graded assets, (vi) changes in the quality of our credit review function, (vii) changes in the value of the underlying collateral for loans that are non-collateral dependent, (viii) the existence, growth, and effect of any concentrations of credit and (ix) other factors such as the regulatory, legal and technological environments; competition; and events such as natural disasters or health pandemics. Management believes it uses relevant information available to make determinations about the allowance and that it has established the existing allowance in accordance with GAAP. However, the determination of the allowance requires significant judgment, and estimates of expected lifetime losses in the loan portfolio can vary significantly from the amounts actually observed. While management uses available information to recognize expected losses, future additions to the allowance may be necessary based on changes in the loans comprising the portfolio, changes in the current and forecasted economic conditions, changes to the interest rate environment which may directly impact prepayment and curtailment rate assumptions, and changes in the financial condition of borrowers. Allowance for Credit Losses—Off-Balance-Sheet/Reserve for Unfunded Commitments The allowance for credit losses on off-balance-sheet credit exposures is a liability account, calculated in accordance with ASC 326, representing expected credit losses over the contractual period for which we are exposed to credit risk resulting from a contractual obligation to extend credit. These obligations include unfunded lines of credit, commitments to extend credit and federal funds sold to correspondent banks and standby letters of credit. No allowance is recognized if we have the unconditional right to cancel the obligation. The allowance is reported as a component of accrued interest payable and other liabilities in our consolidated balance sheets. Adjustments to the allowance are reported in our income statement as a component of the provision for credit losses. At December 31, 2022 and 2021, the Company’s reserve for unfunded commitments totaled $ 12,323,000 and $ 6,436,000 , respectively, which is included in other liabilities in the consolidated balance sheet. Other Real Estate Other real estate owned is foreclosed property held pending disposition and is initially recorded at fair value, less estimated costs to sell. At foreclosure, if the fair value of the real estate, less estimated costs to sell, is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for credit losses. Any subsequent reduction in value is recognized by a charge to income. Operating and holding expenses of such properties, net of related income, and gains and losses on their disposition are included in net gain (loss) on sale of foreclosed assets as incurred. Bank Premises and Equipment Bank premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized over the life of the respective lease or the estimated useful lives of the improvements, whichever is shorter. Business Combinations, Goodwill and Other Intangible Assets The Company accounts for all business combinations under the purchase method of accounting. Tangible and intangible assets and liabilities of the acquired entity are recorded at fair value. Intangible assets with finite useful lives represent the future benefit associated with the acquisition of the core deposits and are amortized over seven years , utilizing a method that approximates the expected attrition of the deposits. Goodwill with an indefinite life is not amortized, but rather tested annually for impairment as of June 30 each year and totaled $ 313,481,000 at both December 31, 2022 and 2021 , respectively. There was no impairment recorded for the years ended December 31, 2022, 2021 and 2020. The carrying amount of goodwill arising from acquisitions that qualify as an asset purchase for federal income tax purposes was $ 11,233,000 and $ 13,640,000 at December 31, 2022 and 2021 , respectively, and is deductible for federal income tax purposes. Securities Sold Under Agreements To Repurchase Securities sold under agreements to repurchase, which are classified as borrowings, generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of the cash received in connection with the transaction. The Company may be required to provide additional collateral based on the estimated fair value of the underlying securities. Segment Reporting The Company has determined that its banking regions meet the aggregation criteria of the current authoritative accounting guidance since each of its banking regions offer similar products and services, operate in a similar manner, have similar customers and report to the same regulatory authority, and therefore operate one line of business (community banking) located in a single geographic area (Texas). Statements of Cash Flows For purposes of reporting cash flows, cash and ca

Securities

Securities	12 Months Ended
	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Securities	2. SECURITIES: Debt securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost, related gross unrealized gains and losses, allowance for credit losses and the fair value of available-for-sale securities are as follows (dollars in thousands): December 31, 2022 Amortized Gross Gross Estimated Securities available-for-sale: U.S. Treasury securities $ 508,275 $ 11 $ ( 25,737 ) $ 482,549 Obligations of state and political subdivisions 2,104,193 1,217 ( 206,799 ) 1,898,611 Residential mortgage-backed securities 3,034,120 8 ( 417,562 ) 2,616,566 Commercial mortgage-backed securities 392,914 1 ( 18,046 ) 374,869 Corporate bonds and other 112,846 — ( 11,082 ) 101,764 Total securities available-for-sale $ 6,152,348 $ 1,237 $ ( 679,226 ) $ 5,474,359 December 31, 2021 Amortized Gross Gross Estimated Securities available-for-sale: U.S. Treasury securities $ 126,716 $ 125 $ — $ 126,841 Obligations of state and political subdivisions 2,638,369 116,319 ( 1,217 ) 2,753,471 Residential mortgage-backed securities 3,256,746 23,990 ( 21,287 ) 3,259,449 Commercial mortgage-backed securities 356,207 8,914 ( 1 ) 365,120 Corporate bonds and other 69,472 32 ( 1,206 ) 68,298 Total securities available-for-sale $ 6,447,510 $ 149,380 $ ( 23,711 ) $ 6,573,179 The Company did no t hold any securities classified as held-to-maturity for the years ended December 31, 2022 and 2021. The Company invests in mortgage-backed securities that have expected maturities that differ from their contractual maturities. These differences arise because borrowers may have the right to call or prepay obligations with or without a prepayment penalty. These securities include collateralized mortgage obligations (CMOs) and other asset backed securities. The expected maturities of these securities at December 31, 2022, were computed by using scheduled amortization of balances and historical prepayment rates. The amortized cost and estimated fair value of available-for-sale securities at December 31, 2022, by contractual maturity, are shown below (in thousands): Amortized Estimated Due within one year $ 210,053 $ 207,169 Due after one year through five years 1,741,024 1,632,058 Due after five years through ten years 2,715,108 2,376,526 Due after ten years 1,486,163 1,258,606 Total $ 6,152,348 $ 5,474,359 The following tables disclose, as of December 31, 2022 and 2021 , the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands): Less than 12 Months 12 Months or Longer Total December 31, 2022 Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury Securities $ 307,012 $ 11,650 $ 173,105 $ 14,087 $ 480,117 $ 25,737 Obligations of state and political 770,469 55,943 946,571 150,856 1,717,040 206,799 Residential mortgage-backed securities 470,970 37,065 2,143,869 380,497 2,614,839 417,562 Commercial mortgage-backed securities 319,303 11,677 54,862 6,369 374,165 18,046 Corporate bonds and other 41,920 1,698 59,844 9,384 101,764 11,082 Total $ 1,909,674 $ 118,033 $ 3,378,251 $ 561,193 $ 5,287,925 $ 679,226 Less than 12 Months 12 Months or Longer Total December 31, 2021 Fair Unrealized Fair Unrealized Fair Unrealized Obligations of state and political $ 163,698 $ 1,096 $ 18,943 $ 122 $ 182,641 $ 1,218 Residential mortgage-backed securities 2,263,010 19,742 54,392 1,544 2,317,402 21,286 Commercial mortgage-backed securities 820 1 — — 820 1 Corporate bonds and other 47,436 635 16,432 571 63,868 1,206 Total $ 2,474,964 $ 21,474 $ 89,767 $ 2,237 $ 2,564,731 $ 23,711 The number of investments in an unrealized loss position totaled 1,004 at December 31, 2022. Any unrealized losses in the U.S. treasuries and government agencies, state and municipal, mortgage-backed and asset-backed investment securities at December 31, 2022 are due to changes in interest rates and not credit-related events. As such, no allowance for credit losses is required at December 31, 2022. Unrealized losses on investment securities are expected to recover over time as these securities approach maturity. Our mortgage related securities are backed by GNMA, FNMA and FHLMC or are collateralized by securities backed by these agencies. At December 31, 2022 and 2021, 71.86 % and 72.72 % , respectively, of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 54.77 % and 53.94 % , respectively, were guaranteed by the Texas Permanent School Fund. Securities, carried at approximately $ 4,070,454,000 and $ 3,644,626,000 on December 31, 2022 and 2021, respectively, were pledged as collateral for public or trust fund deposits, repurchase agreements and for other purposes required or permitted by law. During 2022, 2021 and 2020, sales of investment securities that were classified as available-for-sale totaled $ 479,273,000 , $ 10,631,000 and $ 263,042,000 . Gross realized gains from 2022, 2021 and 2020 securities sales and calls were $ 6,618,000 , $ 815,000 and $ 3,637,000 , respectively. Gross realized losses from 2022 and 2020 securities sales and calls were $ 4,474,000 and $ 4,000 , respectively. There were no gross realized losses from security sales and calls during 2021. The specific identification method was used to determine cost in order to compute the realized gains and losses

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
LOANS AND ALLOWANCE FOR CREDIT LOSSES	3. LOANS AND ALLOWANCE FOR CREDIT LOSSES: For the year ended December 31, 2022, the tables to follow outline the Company’s loan portfolio by the ten portfolio segments where applicable. Loans held-for-investment by portfolio segment are as follows (dollars in thousands): December 31, 2022 2021 Commercial: C&I * $ 917,317 $ 837,075 Municipal 221,090 177,905 Total Commercial 1,138,407 1,014,980 Agricultural 76,947 98,089 Real Estate: Construction & Development 959,426 749,793 Farm 306,322 217,220 Non-Owner Occupied CRE 732,089 623,434 Owner Occupied CRE 954,400 821,653 Residential 1,575,758 1,334,419 Total Real Estate 4,527,995 3,746,519 Consumer: Auto 550,635 405,416 Non-Auto 147,884 123,968 Total Consumer 698,519 529,384 Total Loans 6,441,868 5,388,972 Less: Allowance for credit losses ( 75,834 ) ( 63,465 ) Loans, net $ 6,366,034 $ 5,325,507 * All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet. Outstanding loan balances at December 31, 2022 and 2021, are net of unearned income, including net deferred loan fees. Our subsidiary bank has established a line of credit with the Federal Home Loan Bank of Dallas (“FHLB”) to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At December 31, 2022 , this available line of credit was $ 2,341,985,000 . At December 31, 2022, $ 4,154,241,000 in loans held by our bank subsidiary were subject to blanket liens as security for this line of credit. At December 31, 2022 , there was no balance outstanding under this line of credit. The Company’s nonaccrual loans, loans still accruing and past due 90 days or more and restructured loans are as follows (dollars in thousands): December 31, 2022 2021 Nonaccrual loans $ 24,306 $ 31,652 Loans still accruing and past due 90 days or more — 8 Troubled debt restructured loans* 19 21 Total $ 24,325 $ 31,681 * Troubled debt restructured loans of $ 3,624,000 and $ 6,721,000 , for which interest collection is doubtful, are included in nonaccrual loans as of December 31, 2022 and 2021 , respectively. The Company had $ 24,325,000 and $ 34,158,000 in nonaccrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets at December 31, 2022 and 2021 , respectively. Nonaccrual loans totaled $ 24,306,000 and $ 31,652,000 at December 31, 2022 and 2021, respectively, and consisted of the following (in thousands): December 31, 2022 2021 Commercial: C&I $ 5,057 $ 5,370 Municipal — — Total Commercial 5,057 5,370 Agricultural 324 4,920 Real Estate: Construction & Development 1,567 708 Farm 85 1,173 Non-Owner Occupied CRE 2,321 2,671 Owner Occupied CRE 7,092 7,897 Residential 7,400 8,360 Total Real Estate 18,465 20,809 Consumer: Auto 429 514 Non-Auto 31 39 Total Consumer 460 553 Total $ 24,306 $ 31,652 The Company recognized interest income on nonaccrual loans prior to being recognized as nonaccrual of approximately $ 1,607,000 , $ 2,122,000 and $ 1,006,000 during the years ended December 31, 2022, 2021 and 2020, respectively. No significant additional funds are committed to be advanced in connection with nonaccrual loans as of December 31, 2022. Summary information on the allowance for credit losses for the year ended December 31, 2022 and 2021, are outlined by portfolio segment in the following tables (in thousands): Year-ended December 31, 2022 C&I Municipal Agricultural Construction & Farm Beginning balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Provision for loan losses 3,485 678 ( 702 ) 8,916 1,294 Recoveries 953 — 155 — — Charge-offs ( 589 ) — ( 9 ) ( 100 ) — Ending balance $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 Year-ended December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 10,722 $ 10,828 $ 8,133 $ 896 $ 371 $ 63,465 Provision for loan losses ( 2,499 ) ( 1,062 ) 1,014 252 164 11,540 Recoveries 852 699 114 293 215 3,281 Charge-offs — ( 537 ) ( 186 ) ( 596 ) ( 435 ) ( 2,452 ) Ending balance $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 Year-ended December 31, 2021 C&I Municipal Agricultural Construction & Farm Beginning balance $ 13,609 $ 1,552 $ 1,255 $ 13,512 $ 1,876 Provision for loan losses ( 1,879 ) ( 1,204 ) 2,989 4,114 ( 1,323 ) Recoveries 2,150 — 36 1 110 Charge-offs ( 1,600 ) — ( 2,683 ) — — Ending balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Year-ended December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 8,391 $ 12,347 $ 12,601 $ 1,020 $ 371 $ 66,534 Provision for loan losses 1,635 ( 2,109 ) ( 4,471 ) 85 74 ( 2,089 ) Recoveries 702 821 96 401 211 4,528 Charge-offs ( 6 ) ( 231 ) ( 93 ) ( 610 ) ( 285 ) ( 5,508 ) Ending balance 10,722 10,828 8,133 896 371 $ 63,465 Additionally, the Company records a reserve for unfunded commitments in other liabilities which totaled $ 12,323,000 and $ 6,436,000 at December 31, 2022 and 2021, respectively. The $ 11,540,000 provision for loan losses in 2022 above is combined with the provision for unfunded commitments of $ 5,887,000 and reported in the aggregate under the provision for credit losses in the statement of earnings for the year ended December 31, 2022. The reversal of provision for loan losses above of $ 2,089,000 in 2021 is combined with the provision for unfunded commitments of $ 950,000 and reported in the aggregate under the provision for credit losses in the statement of earnings for the year ended December 31, 2021. The Company’s loans that are individually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of December 31, 2022 and December 31, 2021, are summarized in the following table by loan segment (in thousands): December 31, 2022 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ — $ 5,057 $ 24,325 $ 29,382 $ 3,513 $ 4,885 $ 8,398 Municipal — — 58 58 — — — Total Commercial — 5,057 24,383 29,440 3,513 4,885 8,398 Agricultural 116 209 354 679 122 276 398 Real Estate: Construction & Development 577 990 4,873 6,440 193 112 305 Farm — 85 1,578 1,663 2 34 36 Non-Owner Occupied CRE 2,062 259 36,037 38,358 16 2,341 2,357 Owner Occupied CRE 4,363 2,728 29,115 36,206 91 1,509 1,600 Residential 5,132 2,268 28,583 35,983 229 1,215 1,444 Total Real Estate 12,134 6,330 100,186 118,650 531 5,211 5,742 Consumer: Auto — 429 931 1,360 1 1 2 Non-Auto — 31 538 569 — 1 1 Total Consumer — 460 1,469 1,929 1 2 3 Total $ 12,250 $ 12,056 $ 126,392 $ 150,698 $ 4,167 $ 10,374 $ 14,541 December 31, 2021 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ 749 $ 4,621 $ 19,021 $ 24,391 $ 2,533 $ 4,094 $ 6,627 Municipal — — 109 109 — — — Total Commercial 749 4,621 19,130 24,500 2,533 4,094 6,627 Agricultural 3,026 1,894 478 5,398 1,086 359 1,445 Real Estate: Construction & Development 102 606 4,765 5,473 90 135 225 Farm 997 176 1,969 3,142 — 2 2 Non-Owner Occupied CRE 2,543 128 31,797 34,468 15 4,044 4,059 Owner Occupied CRE 6,548 1,349 40,607 48,504 152 3,329 3,481 Residential 5,990 2,370 29,210 37,570 307 1,719 2,026 Total Real Estate 16,180 4,629 108,348 129,157 564 9,229 9,793 Consumer: Auto — 514 1,161 1,675 1 3 4 Non-Auto — 39 416 455 — 1 1 Total Consumer — 553 1,577 2,130 1 4 5 Total $ 19,955 $ 11,697 $ 129,533 $ 161,185 $ 4,184 $ 13,686 $ 17,870 The Company’s allowance for loans that are individually evaluated for credit losses and collectively evaluated for credit losses as of December 31, 2022 and December 31, 2021 , are summarized in the following table by loan segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. December 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 8,398 $ — $ 398 $ 305 $ 36 Loans collectively evaluated for credit losses 7,731 1,026 643 26,138 1,921 Total $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 2,357 $ 1,600 $ 1,444 $ 2 $ 1 $ 14,541 Loans collectively evaluated for credit losses 6,718 8,328 7,631 843 314 61,293 Total $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 December 31, 2021 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 6,627 $ — $ 1,445 $ 225 $ 2 Loans collectively evaluated for credit losses 5,653 348 152 17,402 661 Total $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 4,059 $ 3,481 $ 2,026 $ 4 $ 1 $ 17,870 Loans collectively evaluated for credit losses 6,663 7,347 6,107 892 370 45,595 Total $ 10,722 $ 10,828 $ 8,133 $ 896 $ 371 $ 63,465 The Company’s recorded investment in loans as of December 31, 2022 and December 31, 2021, related to the balance in the allowance for credit losses follows below (in thousands). December 31, 2022 C&I Municipal Agriculture Construction & Farm Loans individually evaluated for credit losses $ 29,382 $ 58 $ 679 $ 6,440 $ 1,663 Loans collectively evaluated for credit losses 887,935 221,032 76,268 952,986 304,659 Total $ 917,317 $ 221,090 $ 76,947 $ 959,426 $ 306,322 December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 38,358 $ 36,206 $ 35,983 $ 1,360 $ 569 $ 150,698 Loans collectively evaluated for credit losses 693,731 918,194 1,539,775 549,275 147,315 6,291,170 Total $ 732,089 $ 954,400 $ 1,575,758 $ 550,635 $ 147,884 $ 6,441,868 December 31, 2021 C&I Municipal Agriculture Construction & Farm Loans individually evaluated for credit losses $ 24,391 $ 109 $ 5,398 $ 5,473 $ 3,142 Loans collectively evaluated for credit losses 812,684 177,796 92,691 744,320 214,078 Total $ 837,075 $ 177,905 $ 98,089 $ 749,793 $ 217,220 December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 34,468 $ 48,504 $ 37,570 $ 1,675 $ 455 $ 161,185 Loans collectively evaluated for credit losses 588,966 773,149 1,296,849 403,741 123,513 5,227,787 Total $ 623,434 $ 821,653 $ 1,334,419 $ 405,416 $ 123,968 $ 5,388,972 From a credit risk standpoint, the Company rates its loans in one of five categories: (i) pass, (ii) special mention, (iii) substandard, (iv) doubtful or (v) loss (which are charged-off). The ratings of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on our credits as part of our on-going monitoring of the credit quality of our loan portfolio. Ratings are adjusted to reflect the degree of risk and loss that are felt to be inherent in each credit as of each reporting period. Our methodology is structured so that specific allocations are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss). Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits rated more harshly. Credits rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed. Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even though the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on nonaccrual. The following tables summarize the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at December 31, 2022 (in millions): December 31, 2022 2021 2020 2019 2018 Prior Revolving Total C&I Risk rating: Pass $ 627 $ 157 $ 52 $ 22 $ 16 $ 13 $ — $ 887 Special mention 4 1 2 1 — — — 8 Substandard 13 5 2 1 1 — — 22 Doubtful — — — — — — — — Total $ 644 $ 163 $ 56 $ 24 $ 17 $ 13 $ — $ 917 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Municipal Risk rating: Pass $ 79 $ 19 $ 15 $ 4 $ 20 $ 84 $ — $ 221 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 79 $ 19 $ 15 $ 4 $ 20 $ 84 $ — $ 221 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Agricultural Risk rating: Pass $ 60 $ 9 $ 3 $ 2 $ 1 $ 1 $ — $ 76 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 60 $ 10 $ 3 $ 2 $ 1 $ 1 $ — $ 77 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Construction & Development Risk rating: Pass $ 638 $ 218 $ 70 $ 13 $ 8 $ 7 $ — $ 954 Special mention 1 — — — — — — 1 Substandard 4 1 — — — — — 5 Doubtful — — — — — — — — Total $ 643 $ 219 $ 70 $ 13 $ 8 $ 7 $ — $ 960 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Farm Risk rating: Pass $ 147 $ 85 $ 32 $ 11 $ 8 $ 21 $ — $ 304 Special mention — — — — — — — — Substandard 1 — — — — 1 — 2 Doubtful — — — — — — — — Total $ 148 $ 85 $ 32 $ 11 $ 8 $ 22 $ — $ 306 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 258 $ 191 $ 100 $ 49 $ 21 $ 75 $ — $ 694 Special mention — 1 1 11 — 7 — 20 Substandard 8 1 1 2 1 5 — 18 Doubtful — — — — — — — — Total $ 266 $ 193 $ 102 $ 62 $ 22 $ 87 $ — $ 732 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 316 $ 224 $ 128 $ 74 $ 63 $ 113 $ — $ 918 Special mention 1 — 1 8 — 1 — 11 Substandard 1 2 1 2 9 10 — 25 Doubtful — — — — — — — — Total $ 318 $ 226 $ 130 $ 84 $ 72 $ 124 $ — $ 954 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Residential Risk rating: Pass $ 513 $ 355 $ 173 $ 82 $ 64 $ 214 $ 139 $ 1,540 Special mention 1 3 2 — — 3 1 10 Substandard 6 3 2 2 1 9 3 26 Doubtful — — — — — — — — Total $ 520 $ 361 $ 177 $ 84 $ 65 $ 226 $ 143 $ 1,576 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Auto Risk rating: Pass $ 331 $ 131 $ 55 $ 25 $ 6 $ 2 $ — $ 550 Special mention — — — — — — — — Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 331 $ 131 $ 56 $ 25 $ 6 $ 2 $ — $ 551 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Auto Risk rating: Pass $ 85 $ 41 $ 9 $ 3 $ 1 $ 1 $ 7 $ 147 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 85 $ 42 $ 9 $ 3 $ 1 $ 1 $ 7 $ 148 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Total Loans Risk rating: Pass $ 3,054 $ 1,430 $ 637 $ 285 $ 208 $ 531 $ 146 $ 6,291 Special mention 7 5 6 20 — 11 1 50 Substandard 33 14 7 7 12 25 3 101 Doubtful — — — — — — — — Total $ 3,094 $ 1,449 $ 650 $ 312 $ 220 $ 567 $ 150 $ 6,442 The following tables summarize the Company’s internal ratings of its loans held-for-investment, including the year of origination by portfolio segments, at December 31, 2021 (in millions): December 31, 2021 2020 2019 2018 2017 Prior Revolving Total C&I Risk rating: Pass $ 526 $ 178 $ 52 $ 29 $ 17 $ 11 $ — $ 813 Special mention 4 1 4 — — — — 9 Substandard 7 4 1 3 — — — 15 Doubtful — — — — — — — — Total $ 537 $ 183 $ 57 $ 32 $ 17 $ 11 $ — $ 837 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Municipal Risk rating: Pass $ 39 $ 15 $ 6 $ 22 $ 17 $ 79 $ — $ 178 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 39 $ 15 $ 6 $ 22 $ 17 $ 79 $ — $ 178 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Agricultural Risk rating: Pass $ 69 $ 8 $ 6 $ 6 $ 3 $ 1 $ — $ 93 Special mention — — — — — — — — Substandard 4 1 — — — — — 5 Doubtful — — — — — — — — Total $ 73 $ 9 $ 6 $ 6 $ 3 $ 1 $ — $ 98 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Construction & Development Risk rating: Pass $ 557 $ 134 $ 24 $ 14 $ 7 $ 8 $ — $ 744 Special mention 2 — — — — — — 2 Substandard 2 2 — — — — — 4 Doubtful — — — — — — — — Total $ 561 $ 136 $ 24 $ 14 $ 7 $ 8 $ — $ 750 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Farm Risk rating: Pass $ 117 $ 42 $ 15 $ 10 $ 7 $ 23 $ — $ 214 Special mention — — — — — — — — Substandard 1 1 — 1 — — — 3 Doubtful — — — — — — — — Total $ 118 $ 43 $ 15 $ 11 $ 7 $ 23 $ — $ 217 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 214 $ 128 $ 77 $ 56 $ 31 $ 84 $ — $ 590 Special mention — 1 12 — 7 3 — 23 Substandard — 1 3 1 3 3 — 11 Doubtful — — — — — — — — Total $ 214 $ 130 $ 92 $ 57 $ 41 $ 90 $ — $ 624 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 250 $ 143 $ 114 $ 90 $ 59 $ 117 $ — $ 773 Special mention 2 2 1 — 1 1 — 7 Substandard 8 2 3 13 5 11 — 42 Doubtful — — — — — — — — Total $ 260 $ 147 $ 118 $ 103 $ 65 $ 129 $ — $ 822 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Residential Risk rating: Pass $ 477 $ 230 $ 115 $ 84 $ 68 $ 222 $ 100 $ 1,296 Special mention 3 4 — 1 1 3 1 13 Substandard 3 3 3 2 2 10 2 25 Doubtful — — — — — — — — Total $ 483 $ 237 $ 118 $ 87 $ 71 $ 235 $ 103 $ 1,334 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Auto Risk rating: Pass $ 218 $ 105 $ 54 $ 17 $ 7 $ 2 $ — $ 403 Special mention 1 — — — — — — 1 Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 219 $ 105 $ 55 $ 17 $ 7 $ 2 $ — $ 405 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Non-Auto Risk rating: Pass $ 81 $ 22 $ 8 $ 4 $ 1 $ 1 $ 7 $ 124 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 81 $ 22 $ 8 $ 4 $ 1 $ 1 $ 7 $ 124 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Total Loans Risk rating: Pass $ 2,548 $ 1,005 $ 471 $ 332 $ 217 $ 548 $ 107 $ 5,228 Special mention 12 8 17 1 9 7 1 55 Substandard 25 14 11 20 10 24 2 106 Doubtful — — — — — — — — Total $ 2,585 $ 1,027 $ 499 $ 353 $ 236 $ 579 $ 110 $ 5,389 At December 31, 2022 and 2021, the Company’s past due loans are as follows (in thousands): December 31, 2022 15-59 60-89 Greater Total Current Total Loans 90 Days Commercial: C&I $ 3,924 $ 297 $ 1,646 $ 5,867 $ 911,450 $ 917,317 $ — Municipal 76 783 — 859 220,231 221,090 — Total Commercial 4,000 1,080 1,646 6,726 1,131,681 1,138,407 — Agricultural 243 — — 243 76,704 76,947 — Real Estate: Construction & Development 3,751 — 175 3,926 955,500 959,426 — Farm 668 — — 668 305,654 306,322 — Non-Owner Occupied CRE 1,444 160 — 1,604 730,485 732,089 — Owner Occupied CRE 1,151 — — 1,151 953,249 954,400 — Residential 8,720 707 266 9,693 1,566,065 1,575,758 — Total Real Estate 15,734 867 441 17,042 4,510,953 4,527,995 — Consumer: Auto 779 30 — 809 549,826 550,635 — Non-Auto 50 — — 50 147,834 147,884 — Total Consumer 829 30 — 859 697,660 698,519 — Total $ 20,806 $ 1,977 $ 2,087 $ 24,870 $ 6,416,998 $ 6,441,868 $ — December 31, 2021 15-59 60-89 Greater Total Current Total Loans 90 Days Commercial: C&I $ 3,638 $ 34 $ 222 $ 3,894 $ 833,181 $ 837,075 $ 5 Municipal 63 — — 63 177,842 177,905 — Total Commercial 3,701 34 222 3,957 1,011,023 1,014,980 5 Agricultural 181 — — 181 97,908 98,089 — Real Estate: Construction & Development 2,953 39 — 2,992 746,801 749,793 — Farm 600 215 — 815 216,405 217,220 — Non-Owner Occupied CRE 235 — — 235 623,199 623,434 — Owner Occupied CRE 813 — 280 1,093 820,560 821,653 — Residential 4,984 327 410 5,721 1,328,698 1,334,419 — Total Real Estate 9,585 581 690 10,856 3,735,663 3,746,519 — Consumer: Auto 393 26 — 419 404,997 405,416 — Non-Auto 145 24 3 172 123,796 123,968 3 Total Consumer 538 50 3 591 528,793 529,384 3 Total $ 14,005 $ 665 $ 915 $ 15,585 $ 5,373,387 $ 5,388,972 $ 8 * The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due. The restructuring of a loan is considered a “troubled debt restructuring” if both the borrower is experiencing financial difficulties and the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, principal forgiveness, restructuring amortization schedules, reductions in collateral and other actions intended to minimize potential losses. The Company’s loans that were modified in the years ended December 31, 2022 and 2021, and considered troubled debt restructurings are as follows (in thousands): Year Ended December 31, 2022 Year Ended December 31, 2021 Pre- Post- Pre- Post- Recorded Recorded Recorded Recorded Number Investment Investment Number Investment Investment Commercial: C&I 1 $ 206 $ 206 4 $ 361 $ 361 Municipal — — — — — — Total Commercial 1 206 206 4 361 361 Agricultural — — — 4 3,988 3,988 Real Estate: Construction & Development — — — 1 200 200 Farm — — — — — — Non-Owner Occupied CRE — — — — — — Owner Occupied CRE 1 1,788 1,788 3 1,047 1,047 Residential 1 129 129 5 519 519 Total Real Estate 2 1,917 1,917 9 1,766 1,766 Consumer: Auto — — — 2 51 51 Non-Auto — — — 1 9 9 Total Consumer — — — 3 60 60 Total 3 $ 2,123 $ 2,123 20 $ 6,175 $ 6,175 The balances below provide information as to how the loans were modified as troubled debt restructured loans during the years ended December 31, 2022 and 2021 (in thousands): Year Ended December 31, 2022 Year Ended December 31, 2021 Adjusted Combined Adjusted Combined Interest Extended Rate and Interest Extended Rate and Rate Maturity Maturity Rate Maturity Maturity Commercial: C&I $ — $ — $ 206 $ — $ 212 $ 149 Municipal — — — — — — Total Commercial — — 206 — 212 149 Agricultural — — — — 68 3,920 Real Estate: Construction & Development — — — — 200 — Farm — — — — — — Non-Owner Occupied CRE — — — — — — Owner Occupied CRE — — 1,788 — — 1,047 Residential — — 129 — 262 257 Total Real Estate — — 1,917 — 462 1,304 Consumer: Auto — — — — — 51 Non-Auto — — — — — 9 Total Consumer — — — — — 60 Total $ — $ — $ 2,123 $ — $ 742 $ 5,433 During the year ended December 31, 2022, no loans were modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default. During the year ended December 31, 2021 , one residential real estate loan totaling $ 459,000 was modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past or more due or results in the foreclosure and repossession of the applicable collateral. As of December 31, 2022 , the Company has no commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings. An analysis of the changes in loans to officers, directors, principal shareholders, or associates of such persons for the year ended December 31, 2022 (determined as of each respective year-end) follows (in thousands): Beginning Additional Payments Ending Year Ended December 31, 2022 $ 137,527 $ 233,232 $ 262,992 $ 107,767 In the opinion of management, those loans are on substantially the same terms, including interest rates and collateral requirements, as those prevailing at the time for comparable transactions with unaffiliated persons.

Loans Held for Sale

Loans Held for Sale	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Loans Held for Sale	4. LOANS HELD-FOR-SALE: Loans held-for-sale totaled $ 11,965,000 and $ 37,810,000 at December 31, 2022 and 2021, respectively. At December 31, 2022 and 2021, $ 1,468,000 and $ 3,688,000 , respectively, are valued at the lower of cost or fair value, and the remaining amount are valued under the fair value option. The change to the fair value option for loans held-for-sale was effective at June 30, 2018 and was done in conjunction with the Company’s move to mandatory delivery in the secondary market and the purchase of forward mortgage-backed securities to manage the changes in fair value (see Note 5 for additional information). These loans, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of the 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 for 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 (see Note 10). Interest income on mortgage loans held-for-sale is recognized based on the contractual rates and reflected in interest income on loans in the consolidated statements of earnings. The Company has no continuing ownership in any of these residential mortgage loans sold. The Company originates certain mortgage loans for sale in the secondary market. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	5. DERIVATIVE FINANCIAL INSTRUMENTS : The Company enters into IRLCs with customers to originate residential mortgage loans at a specific interest rate that are ultimately sold in the secondary market. 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 purchases forward mortgage-backed securities contracts to manage the changes in fair value associated with changes in interest rates related to a portion of the IRLCs. These instruments are typically entered into at the time the IRLC is made in the aggregate. The fair values of IRLCs are based on 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) net of estimated costs to originate the loan. The fair value of IRLCs 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 (see Note 10), as the valuations are based on observable market inputs. Forward mortgage-backed securities contracts are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilizes the exchange price or dealer market price for the particular derivative contract and these instruments are therefore classified as Level 2 in the fair value disclosures (see Note 10). The estimated fair values are subject to change primarily due to changes in interest rates. The impact of these forward contracts is included in gain on sale and fees on mortgage loans in the statement of earnings. These financial instruments are not designated as hedging instruments for accounting purposes. All derivatives are carried at fair value in either other assets or other liabilities, which changes in fair value recorded through earnings in the statement of earnings. The following table provides the outstanding notional balances and fair values of outstanding derivative positions (in thousands): December 31, 2022: Outstanding Asset Liability IRLCs $ 41,664 $ 400 $ — Forward mortgage-backed securities trades 45,000 85 — December 31, 2021: Outstanding Asset Liability IRLCs $ 85,973 $ 1,279 $ — Forward mortgage-backed securities trades 116,000 — 147

Bank Premises and Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Bank Premises and Equipment	6. BANK PREMISES AND EQUIPMENT : The following is a summary of bank premises and equipment (in thousands): Useful Life December 31, 2022 2021 Land — $ 38,703 $ 38,380 Buildings 20 to 40 years 164,371 156,350 Furniture and equipment 3 to 10 years 62,715 60,083 Leasehold improvements Lesser of lease term 5 to 15 years 2,949 2,949 268,738 257,762 Less: accumulated depreciation and amortization ( 115,765 ) ( 107,998 ) Total bank premises and equipment $ 152,973 $ 149,764 Depreciation expense for the years ended December 31, 2022, 2021 and 2020 amounted to $ 10,818,000 , $ 10,504,000 and $ 9,865,000 , respectively, and is included in the captions net occupancy expense and equipment expense in the accompanying consolidated statements of earnings. The Company is lessor for portions of its banking premises. Total rental income for all leases included in net occupancy expense is approximately $ 2,665,000 , $ 2,622,000 and $ 2,789,000 , for the years ended December 31, 2022, 2021 and 2020 , respectively.

Deposits and Borrowings

Deposits and Borrowings	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Deposits and Borrowings	7. DEPOSITS AND BORROWINGS: Time deposits of $ 250,000 or more totaled approximately $ 194,536,000 and $ 151,344,000 at December 31, 2022 and 2021, respectively. At December 31, 2022, the scheduled maturities of time deposits (in thousands) were, as follows: Year ending December 31, 2023 460,755 2024 30,742 2025 15,169 2026 9,226 2027 8,774 Thereafter — $ 524,666 Deposits received from related parties at December 31, 2022 and 2021 totaled $ 198,096,000 and $ 229,791,000 , respectively. Borrowings at December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Securities sold under agreements with customers to $ 618,829 $ 625,499 Federal funds purchased 2,625 24,600 Other borrowings 21,053 21,053 Total $ 642,507 $ 671,152 Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds for which the Company pledges certain securities that have a fair value equal to at least the amount of the borrowings. The agreements mature daily and therefore the risk arising from a decline in the fair value of the collateral pledged is minimal. The securities pledged are mortgage-backed securities. These agreements do not include “right of set-off” provisions and therefore the Company does not offset such agreements for financial reporting purposes. The weighted average interest rate on federal funds purchased, securities sold under repurchase agreements and advances from the FHLB was 3.89 % and 0.06 % at December 31, 2022 and 2021, respectively. During 2021, the Company began investing in qualifying Community Development Entities ("CDE") under the federal New Market Tax Credits ("NMTC") program. See Note 9 for further discussion of our activity and related balances on the consolidated balance sheets, including the $ 21,053,000 in other borrowings shown above.

Line of Credit

Line of Credit	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Line of Credit	8. LINE OF CREDIT: The Company renewed its loan agreement, effective June 30, 2021, with Frost Bank. Under the loan agreement, as renewed and amended, we are permitted to draw up to $ 25,000,000 on a revolving line of credit. Prior to June 30, 2023, interest will be paid quarterly at The Wall Street Journal Prime Rate and the line of credit matures June 30, 2023 . If a balance exists at June 30, 2023, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at The Wall Street Journal Prime Rate. The line of credit is unsecured. Among other provisions in the credit agreement, we must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require us to maintain certain capital, loan loss reserve, non-performing asset and cash flow coverage ratios. In addition, the credit agreement contains certain operational covenants, which among others, restricts the payment of dividends above 55 % of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Since 1995, we have historically declared dividends as a percentage of our consolidated net income in a range of 36 % (low) in 2021 and 2020 to 53 % (high) in 2003 and 2006. The Company was in compliance with the financial and operational covenants at December 31, 2022 . There was no outstanding balance under the line of credit as of December 31, 2022 or 2021 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	9. INCOME TAXES: The Company files a consolidated federal income tax return. Income tax expense is comprised of the following (in thousands): Year Ended December 31, 2022 2021 2020 Current federal income tax $ 50,429 $ 40,527 $ 45,133 Current state income tax 175 350 447 Deferred federal income tax expense (benefit) ( 4,205 ) 3,531 ( 5,249 ) Income tax expense $ 46,399 $ 44,408 $ 40,331 Income tax expense, as a percentage of pretax earnings, differs from the statutory federal income tax rate as follows: As a Percent of Pretax Earnings 2022 2021 2020 Statutory federal income tax rate 21.0 % 21.0 % 21.0 % Reductions in tax rate resulting from interest income ( 4.4 ) ( 4.7 ) ( 4.6 ) Other ( 0.1 ) 0.0 0.2 Effective income tax rate 16.5 % 16.3 % 16.6 % The approximate effects of each type of difference that gave rise to the Company’s deferred tax assets and liabilities at December 31, 2022 and 2021 are as follows (in thousands): 2022 2021 Deferred tax assets: Tax basis of loans in excess of financial statement basis $ 19,474 $ 15,607 Recognized for financial reporting purposes but not yet 3,303 2,933 Net unrealized loss on investment securities available-for- 142,276 — Other deferred tax assets 1,038 831 Total deferred tax assets $ 166,091 $ 19,371 Deferred tax liabilities: Financial statement basis of fixed assets in excess of tax $ 6,019 $ 6,178 Intangible asset amortization deductible for tax purposes, 13,866 13,594 Recognized for financial reporting purposes but not yet 644 499 Net unrealized gain on investment securities available-for- — 26,384 Other deferred tax liabilities 51 69 Total deferred tax liabilities $ 20,580 $ 46,724 Net deferred tax asset (liability) $ 145,511 $ ( 27,353 ) At December 31, 2022 and 2021 , management believes that it is more likely than not that all of the deferred tax assets shown above will be realized and therefore no valuation allowance was recorded. Low Income Housing Tax Credit Investments - During 2021, the Company began investing in an affordable housing fund that will invest in real estate projects that qualify for the federal low income housing tax credit (“LIHTC”) program designed to promote private development of low income housing. The investments made by the fund will generate a return to the Company primarily through the realization of LIHTCs, and also through federal tax deductions generated from the ongoing operating losses from the investees of the fund. The Company’s investment in the fund will be amortized through income tax expense using the proportional amortization method as related tax credits are utilized by the Company. The initial capital contribution commitment to the fund was for up to $ 5,500,000 . Contributions were $ 131,000 and $ 55,000 at December 31, 2022 and 2021, respectively, which is included in other assets. New Market Tax Credits - During 2021, the Company began investing in qualifying CDEs under the federal NMTC program. NMTC investments are made through the third-party CDEs which are qualified through the U.S. Department of the Treasury and receive periodic allocation of amounts under the NMTC program. NMTCs are generated from qualified investments by the CDEs utilizing equity investments made by a taxpayer, like the Company. Through these equity investments, the Company will receive the tax benefits from the NMTCs equal to 39 % of the qualified investment from the CDE to qualifying eligible projects over a seven year period. The Company’s equity investments in the CDEs is amortized using the effective yield method a related tax credits are allocated to the Company. At December 31, 2022 and 2021, the consolidated balance sheet of the Company included the $ 18,000,000 loan to the investee in loans and the $ 21,053,000 leveraged loan from the investee in other borrowings (see Note 7). At December 31, 2022 and 2021, the consolidated balance sheet of the Company included CDE investments in other assets of $ 26,825,000 and $ 29,000,000 , respectively. Current authoritative accounting guidance prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of cumulative benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Current authoritative accounting guidance also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties. The Company concluded the tax benefits of positions taken and expected to be taken on its tax returns should be recognized in the financial statements under this guidance. The Company files income tax returns in the U.S. federal jurisdiction and state margin tax returns in the state of Texas. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2018 or Texas state tax examinations by tax authorities for years before 2019. As of December 31, 2022 and 2021 , the Company believes that there are no uncertain tax positions.

Fair Value Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Disclosures	10. FAIR VALUE DISCLOSURES: The authoritative accounting guidance for fair value measurements defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact, and (iv) willing to transact. The authoritative accounting guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the authoritative guidance 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 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 (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities. A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Securities classified as available-for-sale and trading are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include market spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, dealer quotes, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items. See Notes 4 and 5 related to the determination of fair value for loans held-for-sale, IRLCs and forward mortgage-backed securities trades. There were no transfers between Level 2 and Level 3 during the years ended December 31, 2022, 2021 and 2020. The following table summarizes the Company’s available-for-sale securities, loans held-for-sale, and derivatives which are measured at fair value on a recurring basis as of December 31, 2022 and 2021 segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): December 31, 2022 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 482,549 $ — $ — $ 482,549 Obligations of state and political subdivisions — 1,898,611 — 1,898,611 Corporate bonds — 97,850 — 97,850 Residential mortgage-backed securities — 2,616,566 — 2,616,566 Commercial mortgage-backed securities — 374,869 — 374,869 Other securities 3,914 — — 3,914 Total $ 486,463 $ 4,987,896 $ — $ 5,474,359 Loans held-for-sale $ — $ 10,497 $ — $ 10,497 IRLCs $ — $ 400 $ — $ 400 Forward mortgage-backed securities traded $ — $ 85 $ — $ 85 December 31, 2021 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 126,841 $ — $ — $ 126,841 Obligations of state and political subdivisions — 2,753,471 — 2,753,471 Corporate bonds — 63,868 — 63,868 Residential mortgage-backed securities — 3,259,449 — 3,259,449 Commercial mortgage-backed securities — 365,120 — 365,120 Other securities 4,430 — — 4,430 Total $ 131,271 $ 6,441,908 $ — $ 6,573,179 Loans held-for-sale $ — $ 34,122 $ — $ 34,122 IRLCs $ — $ 1,279 $ — $ 1,279 Forward mortgage-backed securities traded $ — $ ( 147 ) $ — $ ( 147 ) The following table summarizes the Company’s loans held-for-sale at fair value and the net unrealized gains as of the balance sheet dates shown below (in thousands): December 31, 2022 2021 Unpaid principal balance on loans held-for-sale $ 10,226 $ 33,200 Net unrealized gains on loans held-for-sale 271 922 Loans held-for-sale at fair value $ 10,497 $ 34,122 The following table summarizes the Company’s gains on sale and fees of mortgage loans for the years ended December 31, 2022, 2021 and 2020 (in thousands): Years ended December 31, 2022 2021 2020 Realized gain on sale and fees on mortgage loans* $ 20,357 $ 37,091 $ 39,378 Change in fair value on loans held-for-sale and IRLCs ( 1,554 ) ( 5,259 ) 5,900 Change in forward mortgage-backed securities trades 232 1,413 ( 1,406 ) Total gain on sale of mortgage loans $ 19,035 $ 33,245 $ 43,872 * This includes gain on loans held-for-sale carried under the fair value method and lower of cost or market. No residential mortgage loans held-for-sale were 90 days or more past due or considered nonaccrual as of December 31, 2022 or 2021 . No significant credit losses were recognized on mortgage loans held-for-sale for the years ended December 31, 2022, 2021 and 2020. Certain non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis include other real estate owned, goodwill and other intangible assets and other non-financial long-lived assets. Non-financial assets measured at fair value on a nonrecurring basis during the years ended December 31, 2022 and 2021 include other real estate owned which, subsequent to their initial transfer to other real estate owned from loans, were re-measured at fair value through a write-down included in gain (loss) on sale of foreclosed assets. During the reported periods, all fair value measurements for foreclosed assets utilized Level 2 inputs based on observable market data, generally third-party appraisals, or Level 3 inputs based on customized discounting criteria. These appraisals are evaluated individually and discounted as necessary due to the age of the appraisal, lack of comparable sales, expected holding periods of property or special use type of the property. Such discounts vary by appraisal based on the above factors but generally range from 5 % to 25 % of the appraised value. Re-evaluation of other real estate owned is performed at least annually as required by regulatory guidelines or more often if particular circumstances arise. There were no other real estate owned properties that were re-measured subsequent to their initial transfer to other real estate owned during the years ended December 31, 2022 and 2021. At December 31, 2022 and 2021 , the Company had no other real estate owned. The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction. The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values. Cash and due from banks, federal funds sold, interest-bearing deposits in banks and accrued interest receivable and payable are liquid in nature and considered Levels 1 or 2 of the fair value hierarchy. Financial instruments with stated maturities have been valued using a present value discounted cash flow with a discount rate approximating current market for similar assets and liabilities and are considered Levels 2 and 3 of the fair value hierarchy. Financial instrument liabilities with no stated maturities have an estimated fair value equal to both the amount payable on demand and the carrying value and are considered Level 1 of the fair value hierarchy. The carrying value and the estimated fair value of the Company’s contractual off-balance-sheet unfunded lines of credit, loan commitments and letters of credit, which are generally priced at market at the time of funding, are not material. The estimated fair values and carrying values of all financial instruments under current authoritative guidance at December 31, 2022 and 2021, were as follows (in thousands): 2022 2021 Carrying Estimated Carrying Estimated Fair Value Value Fair Value Value Fair Value Hierarchy Cash and due from banks $ 293,286 $ 293,286 $ 205,053 $ 205,053 Level 1 Interest-bearing demand deposits in banks 37,392 37,392 323,535 323,535 Level 1 Available-for-sale securities 5,474,359 5,474,359 6,573,179 6,573,179 Levels 1 and 2 Loans held-for-investment, net of allowance for 6,366,034 6,372,859 5,325,507 5,335,791 Level 3 Loans held-for-sale 11,965 11,965 37,810 37,844 Level 2 Accrued interest receivable 58,162 58,162 57,169 57,169 Level 2 Deposits with stated maturities 524,666 518,811 461,415 462,312 Level 2 Deposits with no stated maturities 10,480,841 10,480,841 10,105,073 10,105,073 Level 1 Borrowings 642,507 642,507 671,152 671,152 Level 2 Accrued interest payable 1,121 1,121 221 221 Level 2 IRLCs 400 400 1,279 1,279 Level 2 Forward mortgage-backed securities trades 85 85 ( 147 ) ( 147 ) Level 2

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. COMMITMENTS AND CONTINGENCIES: The Company is engaged in legal actions arising from the normal course of business. In management’s opinion, the Company has adequate legal defenses with respect to these actions, and as of December 31, 2022 the resolution of these matters is not expected to have material adverse effects upon the results of operations or financial condition of the Company. The Company leases a portion of its bank premises and equipment under operating leases. At December 31, 2022, future minimum lease comm itments were: 2023 - $ 1,066,000 , 2024 - $ 664,000 , 2025 - $ 431,000 , 2026 - $ 89,000 and 2027 - $ 60,000 and thereafter - $ 20,000 .

Financial Instruments with Off-

Financial Instruments with Off-Balance-Sheet Risk	12 Months Ended
	Dec. 31, 2022
Text Block [Abstract]
Financial Instruments with Off-Balance-Sheet Risk	12. FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK: We are a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include unfunded lines of credit, commitments to extend credit and federal funds sold to correspondent banks and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. At December 31, 2022, the Company’s reserve for unfunded commitments totaled $ 12,323,000 which is recorded in other liabilities. Our exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. We generally use the same credit policies in making commitments and conditional obligations as we do for on-balance sheet instruments. December 31, 2022 (in thousands) Financial instruments whose contract amounts represent credit risk: Unfunded lines of credit $ 1,103,286 Unfunded commitments to extend credit 916,287 Standby letters of credit 43,698 Total commitments $ 2,063,271 The above table also does not include balances related to the Company’s IRLCs and forward mortgage-backed security trades. Unfunded lines of credit and 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. These 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. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, as we deem necessary upon extension of credit, is based on our credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment and income-producing commercial properties. Standby letters of credit are conditional commitments we issue to guarantee the performance of a customer to a third-party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount. We believe we have no other off-balance sheet arrangements or transactions with unconsolidated, special purpose entities that would expose us to liability that is not reflected on the face of the financial statements.

Concentration of Credit Risk

Concentration of Credit Risk	12 Months Ended
	Dec. 31, 2022
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	13. CONCENTRATION OF CREDIT RISK: The Company grants commercial, retail, agriculture and residential real estate loans to customers primarily in North Central, Southeastern and West Texas. Although the Company has a diversified loan portfolio, a substantial portion of its borrowers’ ability to honor their commitments is dependent upon each local economic sector. In addition, the Company holds mortgage related securities which are guaranteed by GNMA, FNMA or FHLMC or are collateralized by loans backed by these agencies.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Employee Benefit Plans	14. EMPLOYEE BENEFIT PLANS: The Company also provides a 401(k) plan and profit sharing plan, a qualified defined contribution plan, which covers substantially all full-time employees. The 401(k) feature allows employees to contribute a percentage of their base annual salary with a corresponding employer match. The profit sharing feature includes an employee stock ownership feature (“ESOP”). Employees are fully vested to the extent of their contributions and become fully vested in the Company’s profit sharing contributions over a six-year vesting period. The Company matches a maximum of 4 % on employee deferrals of 5 % of their employee compensation. Total expense for this match in 2022, 2021 and 2020 was $ 3,675,000 , $ 3,590,000 and $ 3,374,000 , respectively, and is included in salaries and employee benefits in the statements of earnings. Costs related to the Company’s profit sharing plan totaled approximately $ 4,233,000 , $ 10,134,000 and $ 10,740,000 in 2022, 2021 and 2020, respectively, and are included in salaries and employee benefits in the accompanying consolidated statements of earnings. As of December 31, 2022 and 2021, the profit sharing plan’s ESOP assets included First Financial Bankshares, Inc. common stock of 2,148,460 and 2,183,760 shares valued at approximately $ 73,907,000 and $ 111,022,000 , respectively. The Company has a non-qualified “excess benefit” plan where executives, whose Company contributions to the profit sharing plan and employer match under the 401(k) feature are curtailed due to Internal Revenue Service limitations, received contributions from the Company equal to the amount under qualified plans as if there had been no Internal Revenue Service limitations. This plan used the same contribution formula and vesting requirements as the 401(k) and profit sharing plan. This "Make Whole Plan" was frozen to new participants and contributions effective December 31, 2018. As of December 31, 2022 and 2021, the Make Whole Plan held 114,177 and 116,085 shares, respectively, in trust for the Company’s executives. There were no contributions to this plan during the years ended December 31, 2022, 2021 and 2020. The Company adopted a Supplemental Executive Retirement Plan (“SERP”), effective January 1, 2019, which was amended effective January 1, 2022. The SERP benefits certain key senior executives of the Company who are selected by the Board to participate. The SERP is intended to provide a benefit from the Company upon retirement, death, disability or voluntary or involuntary termination of services (other than “for cause”). Under the SERP, the Company may, but is not required to, make discretionary contributions to the executive’s accounts from time to time. The contributions may be fully vested or subject to vesting conditions imposed by the Board of Directors with respect to the contributions; provided, however, that all unvested amounts credited to an executive’s account will become fully vested upon the executive’s death or disability or upon the occurrence of a change of control (as defined in the SERP). Company contributions to the SERP on behalf of an executive are credited with earnings and losses based on the executive’s investment elections. The investment options under the SERP are currently the same as those offered under the Company’s profit sharing plan, except that Company stock is not an available investment option under the SERP. An executive’s vested account is payable to the participant following his or her termination in a single lump sum or installments, as elected by the participant. The SERP as amended allows selected participants to defer base and incentive compensation as well as the receipt of shares from vested restricted and performance stock units into the plan. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $ 2,172,000 and $ 1,211,000 of SERP balances, respectively. The Company made contributions totaling $ 445,000 , $ 1,163,000 and $ 719,000 to the SERP for the years ended December 31, 2022, 2021 and 2020, subsequent to the respective year ends, for certain executive officers. The Company has a directors’ deferred compensation plan whereby the directors may elect to defer up to 100 % of their directors’ fees. All deferred compensation is invested in the Company’s common stock held in a rabbi trust wherein the funds are used to purchase Company common shares on the open market. The stock is held in nominee name of the trustee, and the principal and earnings of the trust are held separate and apart from other funds of the Company and are used exclusively for the uses and purposes of the deferred compensation agreement. The accounts of the trust have been consolidated in the financial statements of the Company. As of December 31, 2022 and 2021, the rabbi trust held 929,210 and 936,897 shares, respectively, in trust for the Company’s directors and are reflected as treasury shares on the consolidated financial statements. The Company has acquired life insurance policies on certain current and former executives and directors of acquired entities. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $ 33,241,000 and $ 32,404,000 and reported cash value income (net of related insurance premium expenses) of $ 836,000 , $ 814,000 and $ 822,000 in 2022, 2021 and 2020 , respectively.

Dividends from Subsidiaries

Dividends from Subsidiaries	12 Months Ended
	Dec. 31, 2022
Text Block [Abstract]
Dividends from Subsidiaries	15. DIVIDENDS FROM SUBSIDIARIES: At December 31, 2022, $ 437,156,000 was available for the declaration of dividends by the Company’s subsidiaries without the prior approval of regulatory agencies.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Regulatory Matters	16. REGULATORY MATTERS: Banking regulators measure capital adequacy by means of the risk-based capital ratios and the leverage ratio under the Basel III regulatory capital framework and prompt corrective action regulations. The risk-based capital rules provide for the weighting of assets and off-balance-sheet commitments and contingencies according to prescribed risk categories. Regulatory capital is then divided by risk-weighted assets to determine the risk-adjusted capital ratios. The leverage ratio is computed by dividing shareholders’ equity less intangible assets by quarter-to-date average assets less intangible assets. Beginning in January 2015, under the Basel III regulatory capital framework, the implementation of the capital conservation buffer was effective for the Company starting at the 0.625 % level and increased 0.625 % each year thereafter, until it reached 2.50 % on January 1, 2019. As of January 1, 2019, the capital conservation buffer Basel III was fully phased in. 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 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. As of December 31, 2022 and 2021, we had a total risk-based capital ratio of 19.29 % and 20.34 %, a Tier 1 capital to risk-weighted assets ratio of 18.22 % and 19.35 %; a common equity Tier 1 capital to risk-weighted assets ratio of 18.22 % and 19.35 %, and a Tier 1 leverage ratio of 10.96 % and 11.13 %, respectively. The regulatory capital ratios as of December 31, 2022 and 2021 were calculated under Basel III rules. As of December 31, 2022 and 2021, the regulatory capital ratios of the Company and Bank under the Basel III regulatory capital framework are as follows: Actual Minimum Capital Required to be As of December 31, 2022: Amount Ratio Amount Ratio Amount Ratio Total Capital to Risk-Weighted Assets: Consolidated $ 1,586,888 19.29 % $ 863,622 10.50 % $ 822,497 10.00 % First Financial Bank, N.A $ 1,442,902 17.58 % $ 861,860 10.50 % $ 820,819 10.00 % Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,498,731 18.22 % $ 699,122 8.50 % $ 493,498 6.00 % First Financial Bank, N.A $ 1,354,745 16.50 % $ 697,696 8.50 % $ 656,655 8.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,498,731 18.22 % $ 575,748 7.00 % — N/A First Financial Bank, N.A $ 1,354,745 16.50 % $ 574,573 7.00 % $ 533,532 6.50 % Leverage Ratio: Consolidated $ 1,498,731 10.96 % $ 546,983 4.00 % — N/A First Financial Bank, N.A $ 1,354,745 9.95 % $ 544,886 4.00 % $ 681,107 5.00 % Actual Minimum Capital Required to be As of December 31, 2021: Amount Ratio Amount Ratio Amount Ratio Total Capital to Risk-Weighted Assets: Consolidated $ 1,425,907 20.34 % $ 736,003 10.50 % $ 700,955 10.00 % First Financial Bank, N.A $ 1,258,965 17.99 % $ 734,604 10.50 % $ 699,623 10.00 % Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,356,006 19.35 % $ 595,812 8.50 % $ 420,573 6.00 % First Financial Bank, N.A $ 1,189,064 17.00 % $ 594,679 8.50 % $ 559,698 8.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,356,006 19.35 % $ 490,669 7.00 % — N/A First Financial Bank, N.A $ 1,189,064 17.00 % $ 489,736 7.00 % $ 454,755 6.50 % Leverage Ratio: Consolidated $ 1,356,006 11.13 % $ 487,459 4.00 % — N/A First Financial Bank, N.A $ 1,189,064 9.79 % $ 485,926 4.00 % $ 607,407 5.00 % In connection with the adoption of the Basel III regulatory capital framework, our subsidiary bank made the election to continue to exclude accumulated other comprehensive income from available-for-sale securities (“AOCI”) from capital in connection with its quarterly financial filing and, in effect, to retain the AOCI treatment under the prior capital rules. In connection with the First Financial Trust & Asset Management Company, N.A.’s (the “Trust Company”) application to obtain our trust charter, the Trust Company is required to maintain tangible net assets of $ 2,000,000 at all times. As of December 31, 2022, our Trust Company had tangible net assets totaling $ 47,766,000 . Our subsidiary bank may be required at times to maintain reserve balances with the Federal Reserve Bank. At December 31, 2022 and 2021 , there was no subsidiary bank’s reserve balance required, respectively.

Stock Based Compensation

Stock Based Compensation	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock Based Compensation	17. STOCK BASED COMPENSATION: On April 27, 2021, the Company's shareholders approved the 2021 Omnibus Stock and Incentive Plan ("2021 Plan") and reserved 2,500,000 shares of the Company's common stock for issuance under this plan. At December 31, 2022, the Company had 1,877,004 shares of stock available for issuance under the 2021 Plan. The 2021 Plan supersedes all prior stock option and restricted stock plans with shares previously reserved for issuance under such plans cancelled. Restricted Stock Units Under the 2021 Plan, the Company grants restricted stock units under compensation agreements for the benefit of employees, executive officers and directors. Restricted stock unit grants are subject to time-based vesting. The total number of restricted stock units granted represents the maximum number of restricted stock units eligible to vest based upon the service conditions set forth in the grant agreements. The following table summarizes information about the changes in restricted stock units for the years ended December 31, 2022 and 2021, respectively. There was no restricted stock unit activity for the year ended December 31, 2020. For the year ended For the year ended December 31, 2022 December 31, 2021 Restricted Weighted Restricted Weighted Balance at beginning of period 22,597 $ 48.91 — $ — Grants 24,833 47.19 22,597 48.91 Vesting ( 7,425 ) 48.91 — — Forfeited/expired ( 348 ) 48.91 — — Balance at end of period 39,657 $ 47.83 22,597 $ 48.91 Performance Stock Units Also under the 2021 Plan , the Company awards performance-based restricted stock units ("PSUs") to executive officers and other officers and employees. Under the terms of the award, the number of units that will vest and convert to shares of common stock will be based on the extent to which the Company achieves specific performance criteria during the fixed three-year performance period. The number of shares issued upon vesting will range from 0 % to 200 % of the PSUs granted. The PSUs vest at the end of a three-year period based 50 % on each average adjusted earnings per share growth and return on average assets as reported, adjusted for unusual gains/losses, merger expenses, and other items as approved by the compensation committee of the Company's board of directors. Performance for each period is measured relative to other U.S. publicly traded banks with $ 10 billion to $ 50 billion in assets. Compensation expense for the PSUs will be estimated each period based on the fair value of the stock at the grant date and the probable outcome of the performance condition, adjusted for passage of time within the vesting period of the awards. The following table summarizes information about the changes in PSUs as of and for the years ended December 31, 2022 and 2021, respectively. There was no PSU activity during the years ended December 31, 2020. For the year ended For the year ended December 31, 2022 December 31, 2021 Performance-Based Restricted Weighted Performance-Based Restricted Weighted Balance at beginning of period 22,597 $ 48.91 — $ — Grants 24,833 47.19 22,597 48.91 Vesting — — — — Forfeited/expired ( 348 ) 48.91 — — Balance at end of period 47,082 $ 48.00 22,597 $ 48.91 Restricted Stock Awards On April 28, 2015, shareholders of the Company approved the 2015 Restricted Stock Plan (the "2015 Plan") for selected employees, officers, non-employee directors and consultants. On April 27, 2021, the 2015 Plan was superseded by the new 2021 Plan and all shares previously reserved for issuance under the 2015 Plan were cancelled. The following table summarizes information about vested and unvested restricted stock. For the year ended For the year ended For the year ended December 31, 2022 December 31, 2021 December 31, 2020 Restricted Weighted Restricted Weighted Restricted Weighted Balance at beginning of period 46,598 $ 35.75 95,888 $ 29.89 105,309 $ 29.93 Grants 15,425 40.89 12,110 49.58 56,480 29.22 Vesting ( 37,010 ) 37.61 ( 60,011 ) 29.25 ( 65,662 ) 29.39 Forfeited/expired ( 200 ) 29.70 ( 1,389 ) 32.76 ( 239 ) 29.70 Balance at end of period 24,813 $ 36.21 46,598 $ 35.75 95,888 $ 29.89 The total fair value of restricted stock vested was $ 1,861,000 , $ 2,947,000 and $ 1,924,000 for the years ended December 31, 2022, 2021 and 2020, respectively. The Company recorded restricted stock unit, performance-based restricted stock unit and restricted stock award expense for employees of $ 1,887,000 , $ 1,329,000 and $ 1,301,000 , respectively, for the years ended December 31, 2022, 2021 and 2020. The Company recorded director expense related to these restricted stock grants of $ 631,000 , $ 600,000 and $ 635,000 for the years ended December 31, 2022, 2021, and 2020, respectively. As of December 31, 2022 and 2021, there were $ 3,422,000 and $ 3,004,000 , respectively, of total unrecognized compensation cost related to consolidated unvested restricted stock units, performance-based restricted stock units and restricted stock awards, which is expected to be recognized over a weighted-average period of 1.13 years and 1.42 years, respectively. At December 31, 2022 and 2021, there was $ 74,000 and $ 52,000 , respectively, accrued in other liabilities related to dividends declared to be paid upon vesting. Stock Option Plan Prior to approval of the 2021 Plan, the 2012 Incentive Stock Option Plan (the "2012 Plan") provided for the granting of options to employees of the Company at prices not less than market value at the date of the grant. The 2012 Plan provided that options granted vest and are exercisable after two years from the date of grant and vest at a rate of 20 % each year thereafter and have a 10-year term. The most recent grants from the 2021 Plan provided that 20 % of the options granted vest and are exercisable after one year from the date of grant and the remaining options vest and are exercisable at a rate of 20 % each year thereafter and have a 10-year term. Shares are issued under the 2012 Plan and the 2021 Plan from available authorized shares. An analysis of stock option activity for the year ended December 31, 2022 is presented in the table and narrative below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 1,669,976 $ 25.11 Granted 240,583 47.19 Exercised ( 355,692 ) 18.42 Cancelled ( 64,454 ) 31.56 Outstanding, end of year 1,490,413 29.99 5.86 $ 12,519 Exercisable at end of year 770,401 $ 22.12 4.16 $ 10,057 The options outstanding at December 31, 2022 had exercise prices ranging between $ 15.43 and $ 48.91 . Stock options have been adjusted retroactively for the effects of stock dividends and splits. The following table summarizes information concerning outstanding and vested stock options as of December 31, 2022: Exercise Number Remaining Number Vested $ 15.43 68,785 0.8 68,785 $ 16.95 226,781 2.8 226,781 $ 21.18 440,060 4.4 324,440 $ 29.70 306,125 6.5 107,495 $ 34.55 10,950 7.1 1,950 $ 48.91 199,979 8.6 40,950 $ 47.19 237,733 9.6 — The fair value of the options granted during 2022 were estimated using the Black-Scholes options pricing model with the following weighted-average assumptions: risk-f ree interest rate of 2.92 % ; expected dividend yield of 1.44 % ; expected life of 6.02 years; and expected volatility of 28.72 % . The fair value of the options granted during 2021 were estimated using the Black-Scholes options pricing model with the following weighted-average assumptions: risk-free interest rate of 0.76 % ; expected dividend yield of 1.23 % ; expected life of 6.42 years; and expected volatility of 30.11 % . The fair value of options granted during 2020 were estimated using the Black-Scholes options pricing model with the following weighted-average assumptions: risk-free interest rate of 1.83 %; expected dividend yield of 1.62 %; expected life of 6.64 years; and expected volatility of 26.69 %. The weighted-average grant-date fair value of options granted during 2022, 2021 and 2020 was $ 13.30 , $ 12.99 and $ 7.31 , respectively. The total intrinsic value of options exercised during the years ended December 31, 2022, 2021 and 2020, was $ 9,131,000 , $ 9,486,000 and $ 4,052,000 , respectively. The Company recorded stock option expense totaling $ 1,440,000 , $ 1,316,000 and $ 1,377,000 for the years ended December 31, 2022, 2021 and 2020, respectively. As of December 31, 2022 , there was $ 5,407,000 of total unrecognized compensation cost related to non-vested share-based compensation arrangements granted under the plans. That cost is expected to be recognized over a weighted-average period of 1.96 years. The total fair value of shares vested during the years ended December 31, 2022, 2021 and 2020 was $ 1,750,000 , $ 1,648,000 and $ 1,293,000

Condensed Financial Information

Condensed Financial Information - Parent Company	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information - Parent Company	18. CONDENSED FINANCIAL INFORMATION—PARENT COMPANY: Condensed Balance Sheets - December 31, 2022 and 2021 ASSETS 2022 2021 Cash in subsidiary bank (1) $ 50,204 $ 83,547 Cash in unaffiliated banks (1) 2 2 Interest-bearing deposits in subsidiary bank (1) 69,053 68,814 Total cash and cash equivalents 119,259 152,363 Securities available-for-sale, at fair value 2,235 2,489 Investment in and advances to subsidiaries, at equity (1) 1,171,095 1,629,387 Intangible assets 723 723 Other assets 5,355 3,610 Total assets $ 1,298,667 $ 1,788,572 LIABILITIES AND SHAREHOLDERS’ EQUITY Total liabilities $ 32,930 $ 29,348 Shareholders’ equity: Common stock 1,427 1,425 Capital surplus 677,593 676,871 Retained earnings 1,121,945 981,675 Treasury stock ( 11,035 ) ( 10,090 ) Deferred compensation 11,035 10,090 Accumulated other comprehensive earnings ( 535,228 ) 99,253 Total shareholders’ equity 1,265,737 1,759,224 Total liabilities and shareholders’ equity $ 1,298,667 $ 1,788,572 (1) Eliminates in consolidation. Condensed Statements of Earnings - For the Years Ended December 31, 2022, 2021 and 2020 2022 2021 2020 Income: Cash dividends from subsidiaries (1) $ 67,500 $ 96,500 $ 87,500 Excess of earnings over dividends of subsidiaries (1) 174,741 140,441 122,997 Other 62 279 8,368 Total income 242,303 237,220 218,865 Expenses: Salaries and employee benefits 6,541 7,374 13,795 Other operating expenses 4,106 5,262 5,599 Total expense 10,647 12,636 19,394 Earnings before income taxes 231,656 224,584 199,471 Income tax benefit 2,819 2,978 2,563 Net earnings $ 234,475 $ 227,562 $ 202,034 (1) Eliminates in consolidation . Condensed Statements of Cash Flows - For the Years Ended December 31, 2022, 2021 and 2020 2022 2021 2020 Cash flows from operating activities: Net earnings $ 234,475 $ 227,562 $ 202,034 Adjustments to reconcile net earnings to Excess of earnings over dividends of subsidiaries ( 174,741 ) ( 140,441 ) ( 122,997 ) Depreciation and amortization, net 188 189 198 Gain on sale of assets, net — — ( 38 ) Decrease (increase) in other assets 645 ( 693 ) 164 Increase (decrease) in other liabilities 933 2,997 2,083 Other — ( 4 ) 35 Net cash provided by operating activities 61,500 89,610 81,479 Cash flows from investing activities: Maturity of available-for-sale securities — — 3,720 Purchases of bank premises and equipment and software ( 385 ) ( 106 ) — Net cash provided by (used in) investing activities ( 385 ) ( 106 ) 3,720 Cash flows from financing activities: Proceeds from stock option exercises 6,545 5,905 4,717 Cash dividends paid ( 91,315 ) ( 79,712 ) ( 70,318 ) Repurchase of stock ( 9,449 ) — ( 8,008 ) Net cash used in financing activities ( 94,219 ) ( 73,807 ) ( 73,609 ) Net increase in cash and cash equivalents ( 33,104 ) 15,697 11,590 Cash and cash equivalents, beginning of year 152,363 136,666 125,076 Cash and cash equivalents, end of year $ 119,259 $ 152,363 $ 136,666

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2022
Business Combinations [Abstract]
Acquisitions	. ACQUISITIONS TB&T Bancshares, Inc. On September 19, 2019 , we entered into an agreement and plan of reorganization to acquire TB&T Bancshares, Inc. and its wholly-owned bank subsidiary, The Bank & Trust of Bryan/College Station, Texas. On January 1, 2020, the transaction was completed. Pursuant to the agreement, we issued 6,275,574 shares of the Company’s common stock in exchange for all of the outstanding shares of TB&T Bancshares, Inc. In addition, TBT Bancshares, Inc. made a $ 1,920,000 special dividend to its shareholders prior to closing of the transaction. At closing, a wholly-owned subsidiary of the Company merged into TB&T Bancshares, Inc. and immediately thereafter TB&T Bancshares, Inc. was merged into the Company and The Bank & Trust of Bryan/College Station, Texas, was merged into First Financial Bank, N.A., a wholly-owned subsidiary of the Company. The primary purpose of the acquisition was to expand the Company’s market share near the Houston market. Factors that contributed to a purchase price resulting in goodwill include their record of earnings, strong management and board of directors, strong local economic environment and opportunity for growth. The results of operations from this acquisition are included in the consolidated earnings of the Company commencing January 1, 2020. The following table presents the preliminary amounts recorded on the consolidated balance sheet on the acquisition date (dollars in thousands): Fair value of consideration paid: Common stock issued ( 6,275,574 shares) $ 220,273 Fair value of identifiable assets acquired: Cash and cash equivalents $ 61,028 Securities available-for-sale 93,967 Loans 447,702 Identifiable intangible assets 4,798 Other assets 25,377 Total identifiable assets acquired $ 632,872 Fair value of liabilities assumed: Deposits $ 549,125 Other liabilities 5,397 Total liabilities assumed $ 554,522 Fair value of net identifiable assets acquired 78,350 Goodwill resulting from acquisition $ 141,923 Goodwill recorded in the acquisition was accounted for in accordance with the authoritative business combination guidance. Accordingly, goodwill will not be amortized but will be tested for impairment annually. The goodwill recorded is not deductible for federal income tax purposes. The fair value of total loans acquired was $ 447,702,000 at acquisition compared to contractual amounts of $ 455,181,000 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations First Financial Bankshares, Inc. (a Texas corporation) (“Bankshares”, “Company”, “we” or “us”) is a financial holding company which owns all of the capital stock of one bank with 79 locations located in Texas as of December 31, 2022 . The Company’s subsidiary bank is First Financial Bank, N.A. The Company’s primary source of revenue is providing loans and banking services to consumers and commercial customers in the market area in which First Financial Bank, N.A. is located. In addition, the Company also owns First Financial Trust & Asset Management Company, N.A., First Financial Insurance Agency, Inc., First Technology Services, Inc. and FB Investment Paris Fund, LLC.
Basis of Presentation	Basis of Presentation A summary of significant accounting policies of the Company and its subsidiaries applied in the preparation of the accompanying consolidated financial statements follows. The accounting principles followed by the Company and the methods of applying them are in conformity with both United States generally accepted accounting principles (“GAAP”) and prevailing practices of the banking industry. The Company evaluated subsequent events for potential recognition through the date the consolidated financial statements were issued.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The Company’s significant estimates include its allowance for credit losses and its valuation of financial instruments.
Consolidation	Consolidation The accompanying consolidated financial statements include the accounts of Bankshares and its subsidiaries, all of which are wholly-owned. All intercompany accounts and transactions have been eliminated.
Stock Repurchase	Stock Repurchase On July 27, 2021, the Company's Board of Directors authorized the repurchase of up to 5,000,000 common shares through July 31, 2023. Previously, the Company’s Board of Directors had authorized the repurchase of up to 4,000,000 common shares through September 30, 2021. The stock repurchase plan authorizes management to repurchase and retire the stock at such time as repurchases and retirements are considered beneficial to the Company and its stockholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through July 27, 2021, 324,802 shares were repurchased and retired (all during the months of March and April of 2020) at an average price of $ 24.75 under the previous repurchase plan. Subsequent to July 27, 2021 and through December 31, 2022 , 244,559 shares were repurchased and retired (all during the months of June and July of 2022) at an average price of $ 38.61 .
Acquisition	Acquisition On January 1, 2020, the Company acquired 100 % of the outstanding capital stock of TB&T Bancshares, Inc. through the merger of a wholly-owned subsidiary with and into TB&T Bancshares, Inc. Following such merger, TB&T Bancshares, Inc. and its wholly-owned subsidiary, The Bank & Trust of Bryan/College Station, Texas were merged into the Company and First Financial Bank, N.A., respectively. The results of operations of TB&T Bancshares, Inc. subsequent to the acquisition date, are included in the consolidated earnings of the Company. See Note 19 for additional information.
Adoption of New Accounting Standards	Adoption of New Accounting Standards On January 1, 2020, Accounting Standards Update (“ASU”) 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , became effective for the Company. Accounting Standards Codification (“ASC”) Topic 326 (“ASC 326”) replaced the previous “incurred loss” model for measuring credit losses with an expected loss methodology that is referred to as the current expected credit loss (“CECL”) methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to OBS credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). In addition, ASC 326 made changes to the accounting for available-for-sale debt securities. One such change is to require credit losses to be presented as an allowance rather than as a write-down on available-for-sale debt securities management does not intend to sell or believes that it is more likely than not they will be required to sell. On March 27, 2020, the CARES Act was signed by the President of the United States that included an option for entities to delay the implementation of ASC 326 until the earlier of the termination date of the national emergency declaration by the President, or December 31, 2020. Under this option, the Company elected to delay implementation of CECL and calculated and recorded the provision for credit losses through the nine-months ended September 30, 2020 under the incurred loss model. At December 31, 2020, the Company elected to adopt ASC 326, effective as of January 1, 2020, through a transition charge to retained earnings of $ 589,000 ($ 466,000 net of applicable income taxes). This transition adjustment was comprised of a decrease of $ 619,000 in allowance for credit losses and an increase of $ 1,208,000 in the reserve for unfunded commitments. With the adoption of ASC 326, we revised certain accounting policies and implemented certain accounting policy elections which are described below. Prior to January 1, 2020, allowance for credit losses were based on the incurred loss methodology in accordance with accounting policies disclosed in Note 1 of the Consolidated Financial Statements included in the Company’s 2019 Form 10-K. The Company adopted ASC 326 using the modified retrospective method for all financial assets measured at amortized cost, net investment in leases and OBS credit exposures. The Company adopted ASC 326 using the prospective transition approach for securities for which other-than-temporary impairment had been recognized prior to January 1, 2020. As a result, the amortized cost basis remains the same before and after the effective date of ASC 326. The effective interest rate on these debt securities was not changed. We did not have any securities for which OTTI had been recognized as of December 31, 2019. The Company adopted ASC 326 using the prospective transition approach for financial assets purchased with credit deterioration (“PCD”) that were previously classified as purchased credit impaired (“PCI”) and accounted for under ASC 310-30. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. For the periods ended December 31, 2022 and 2021 , amounts related to the Company’s PCD and PCI loans were insignificant and disclosures related to these balances have been omitted.
Investment Securities	Investment Securities Management classifies debt securities as held-to-maturity, available-for-sale, or trading based on its intent. Securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at amortized cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at fair value, with unrealized holding gains and losses (those for which no allowance for credit losses are recorded) reported as a component of other comprehensive income, net of tax. Management determines the appropriate classification of securities at the time of purchase. Interest income includes amortization of purchase premiums and discounts over the period to maturity using a level-yield method, except for premiums on callable securities, which are amortized to their earliest call date. Realized gains and losses are recorded on the sale of securities in noninterest income. The Company has made a policy election to exclude accrued interest from the amortized cost basis of securities and report accrued interest separately in other assets on the consolidated balance sheets. A security is placed on nonaccrual status at the time any principal or interest payments become more than 90 days delinquent or if full collection of interest or principal becomes uncertain. Accrued interest for a security placed on nonaccrual is reversed against interest income. There was no accrued interest related to securities reversed against interest income for the years ended December 31, 2022 or 2021. The Company records its available-for-sale securities portfolio at fair value. Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security. The Company’s investment portfolio currently consists of obligations of state and political subdivisions, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third-party pricing services to value its investment securities, which the Company reviews as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with pricing matrices. The Company validates prices supplied by the independent pricing services by comparison to prices obtained from other third-party sources on a quarterly basis.
Allowance for Credit Losses – Available-for-Sale Securities	Allowance for Credit Losses – Available-for-Sale Securities For available-for-sale securities in an unrealized loss position, we first assess whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, any previously recognized allowances are charged-off and the security’s amortized cost basis is written down to fair value through income as a provision for credit losses. For available-for-sale securities that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Management has made the accounting policy election to exclude accrued interest receivable on available-for-sale securities from the estimate of credit losses. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit losses. Available-for-sale securities are charged-off against the allowance or, in the absence of any allowance, written down through income when deemed uncollectible by management or when either of the aforementioned criteria regarding intent or requirement to sell is met. Prior to the adoption of ASC 326, declines in the fair value of securities below their cost that were deemed to be other-than-temporary were reflected in earnings as realized losses. In estimating other-than-temporary impairment losses prior to January 1, 2020, management considered, among other things, the length of time and the extent to which the fair value had been less than cost, the financial condition and near-term prospects of the issuer and the intent and our ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. At December 31, 2022 and 2021 , no allowance for credit losses - available-for-sale securities was recorded.
Allowance for Credit Losses – Held-to-Maturity Securities	Allowance for Credit Losses – Held-to-Maturity Securities The allowance for credit losses on held-to-maturity securities is a contra-asset valuation account, calculated in accordance with ASC 326, that is deducted from the amortized cost basis of held-to-maturity securities to present management’s best estimate of the net amount expected to be collected. Held-to-maturity securities are charged-off against the allowance when deemed uncollectible by management. Adjustments to the allowance are reported in our income statement as a component of credit loss expense. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type with each type sharing similar risk characteristics and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management has made the accounting policy election to exclude accrued interest receivable on held-to-maturity securities from the estimate of credit losses. At December 31, 2022 and 2021 , the Company held no securities that were classified as held-to-maturity.
Loans Held-for-Investment	Loans Held-for-Investment Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost, net of the allowance for credit losses. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts, fair value hedge accounting adjustments, deferred loan fees and costs. The Company has made a policy election to exclude accrued interest from the amortized cost basis of loans and report accrued interest separately from the related loan balance in other assets on the condensed consolidated balance sheets. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are placed on nonaccrual status when, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, as well as when required by regulatory provisions. In determining whether or not a borrower may be unable to meet payment obligations for each class of loans, we consider the borrower’s debt service capacity through the analysis of current financial information, if available, and/or current information with regards to our collateral position. Regulatory provisions would typically require the placement of a loan on nonaccrual status if 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 full payment of principal and interest is not expected. Loans may be placed on nonaccrual status regardless of whether or not such loans are considered past due. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income on nonaccrual loans is recognized only to the extent that cash payments are received in excess of principal due. A loan may be returned to accrual status when all the principal and interest amounts contractually due are brought current and future principal and interest amounts contractually due are reasonably assured. Prior to the adoption of ASC 326 on January 1, 2020, loans were reported as impaired when, based on then current information and events, it was probable we would be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. Impairment was evaluated in total for smaller-balance loans of a similar nature and on an individual loan basis for other loans. If a loan was impaired, a specific valuation allowance was allocated, if necessary, so that the loan was reported net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment was expected solely from the collateral. Interest payments on impaired loans were typically applied to principal unless collectability of the principal amount was reasonably assured, in which case interest was recognized on a cash basis. Impaired loans, or portions thereof, were charged off when deemed uncollectible. Further information regarding our accounting policies related to past due loans, nonaccrual loans and troubled-debt restructurings is presented in Note 3.
Acquired Loans	Acquired Loans Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value. The allowance for credit losses related to the acquired loan portfolio is not carried over. Upon the adoption of ASC 326, acquired loans are classified into two categories based on the credit risk characteristics of the underlying borrowers as either purchased credit deteriorated (“PCD”) loans, or loans with no evidence of credit deterioration (“non-PCD”). PCD loans are defined as a loan or pool of loans that have experienced more-than-insignificant credit deterioration since the origination date. The Company uses a combination of individual and pooled review approaches to determine if acquired loans are PCD. At acquisition, the Company considers a number of factors to determine if an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. The initial allowance related to PCD loans that share similar risk characteristics is established using a pooled approach. The Company uses either a discounted cash flow or weighted average remaining life method to determine the required level of the allowance. PCD loans that were classified as nonaccrual as of the acquisition date and are collateral dependent are assessed for allowance on an individual basis. For PCD loans, an initial allowance for credit losses is established on the acquisition date. Subsequent to the acquisition date, the initial allowance for credit losses on PCD loans will increase or decrease based on future evaluations, with changes recognized in the provision for credit losses. Non-PCD loans are pooled into segments together with originated loans that share similar risk characteristics and have an allowance established on the acquisition date, which is recognized in the current period provision for credit losses as well as a fair value adjustment to the amortized cost of the loan and accreted into income over the life of the loan. Determining the fair value of the acquired loans involves estimating the principal and interest payment cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life, interest rate profile, market interest rate environment, payment schedules, risk ratings, probability of default and loss given default, and estimated prepayment rates. For PCD loans, the non-credit discount or premium is allocated to individual loans as determined by the difference between the loan’s unpaid principal balance and amortized cost basis. For non-PCD loans, the fair value discount or premium is allocated to individual loans and recognized into interest income on a level yield basis over the remaining expected life of the loan.
Allowance for Credit Losses (ACL) - Loans	Allowance for Credit Losses—Loans The allowance for credit losses (“allowance” or “ACL”) is a contra-asset valuation account, calculated in accordance with ASC 326, that is deducted from the amortized cost basis of loans. The ACL represents an amount which, in management’s judgement, is adequate to absorb the lifetime expected credit losses that may be experienced on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions and prepayment experience. The allowance for credit losses is measured and recorded upon the initial recognition of a financial asset. Determination of the adequacy of the allowance is inherently complex and requires the use of significant and highly subjective estimates. Loans are charged-off against the allowance when deemed uncollectible by management. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Adjustments to the allowance are reported in our income statement as a component of the provision for credit losses. Management has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses. The Company’s methodology for estimating the allowance includes: (1) a collective quantified reserve that reflects the Company’s historical default and loss experience adjusted for expected economic conditions throughout a reasonable and supportable period and the Company’s prepayment and curtailment rates; (2) collective qualitative factors that consider concentrations of the loan portfolio, expected changes to the economic forecasts, large relationships, early delinquencies, and factors related to credit administrations, including, among others, loan-to-value ratios, borrowers’ risk rating and credit score migrations; and (3) individual allowances on loans where borrowers are experiencing financial difficulty or when the Company determines that the foreclosure is probable. In calculating the allowance for credit losses, most loans are segmented into pools based upon similar characteristics and risk profiles. Common characteristics and risk profiles include the type/purpose of loan, underlying collateral, geographical similarity and historical/expected credit loss patterns. In developing these loan pools for the purposes of modeling expected credit losses, we also analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors. For modeling purposes, our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. We periodically reassess 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. Refer to Note 3 for more details on the Company’s portfolio segments. The Company applies two methodologies to estimate the allowance on its pooled portfolio segments; discounted cash flows method and weighted average remaining life method. Allowance estimates on the following portfolio segments are calculated using the discounted cash flows method: C&I, Municipal, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE and Residential. Allowance estimates on the following portfolio segments are calculated using the remaining life method: Agriculture, Consumer Auto and Consumer Non-Auto. The models related to these methodologies utilize the Company’s historical default and loss experience adjusted for future economic forecasts. The reasonable and supportable forecast period represents a one-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include; Texas unemployment rate, Texas house price index and Texas retail sales index. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience. In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within our loan pools. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk rating of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management’s assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. We reevaluate the fair value of collateral supporting collateral dependent loans on an ongoing basis. Management qualitatively adjusts model results for risk factors that are not considered within our modeling processes but are nonetheless relevant in assessing the expected credit losses within our 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. The various risks that may be considered in making Q-Factor adjustments include, among other things, the impact of (i) changes in lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries, (ii) actual and expected changes in national, regional, and local economic and business conditions and developments that affect the collectability of the loan pools, (iii) changes in the nature, volume and size of a loan or the loan pools and in the terms of the underlying loans, (iv) changes in the experience, ability, and depth of our lending management and staff, (v) changes in volume and severity of past due financial assets, the volume of nonaccrual assets, and the volume and severity of adversely classified or graded assets, (vi) changes in the quality of our credit review function, (vii) changes in the value of the underlying collateral for loans that are non-collateral dependent, (viii) the existence, growth, and effect of any concentrations of credit and (ix) other factors such as the regulatory, legal and technological environments; competition; and events such as natural disasters or health pandemics. Management believes it uses relevant information available to make determinations about the allowance and that it has established the existing allowance in accordance with GAAP. However, the determination of the allowance requires significant judgment, and estimates of expected lifetime losses in the loan portfolio can vary significantly from the amounts actually observed. While management uses available information to recognize expected losses, future additions to the allowance may be necessary based on changes in the loans comprising the portfolio, changes in the current and forecasted economic conditions, changes to the interest rate environment which may directly impact prepayment and curtailment rate assumptions, and changes in the financial condition of borrowers.
Allowance for Credit Losses—Off-Balance-Sheet/Reserve for Unfunded Commitments	Allowance for Credit Losses—Off-Balance-Sheet/Reserve for Unfunded Commitments The allowance for credit losses on off-balance-sheet credit exposures is a liability account, calculated in accordance with ASC 326, representing expected credit losses over the contractual period for which we are exposed to credit risk resulting from a contractual obligation to extend credit. These obligations include unfunded lines of credit, commitments to extend credit and federal funds sold to correspondent banks and standby letters of credit. No allowance is recognized if we have the unconditional right to cancel the obligation. The allowance is reported as a component of accrued interest payable and other liabilities in our consolidated balance sheets. Adjustments to the allowance are reported in our income statement as a component of the provision for credit losses. At December 31, 2022 and 2021, the Company’s reserve for unfunded commitments totaled $ 12,323,000 and $ 6,436,000 , respectively, which is included in other liabilities in the consolidated balance sheet.
Other Real Estate	Other Real Estate Other real estate owned is foreclosed property held pending disposition and is initially recorded at fair value, less estimated costs to sell. At foreclosure, if the fair value of the real estate, less estimated costs to sell, is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for credit losses. Any subsequent reduction in value is recognized by a charge to income. Operating and holding expenses of such properties, net of related income, and gains and losses on their disposition are included in net gain (loss) on sale of foreclosed assets as incurred.
Bank Premises and Equipment	Bank Premises and Equipment Bank premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized over the life of the respective lease or the estimated useful lives of the improvements, whichever is shorter.
Business Combinations, Goodwill and Other Intangible Assets	Business Combinations, Goodwill and Other Intangible Assets The Company accounts for all business combinations under the purchase method of accounting. Tangible and intangible assets and liabilities of the acquired entity are recorded at fair value. Intangible assets with finite useful lives represent the future benefit associated with the acquisition of the core deposits and are amortized over seven years , utilizing a method that approximates the expected attrition of the deposits. Goodwill with an indefinite life is not amortized, but rather tested annually for impairment as of June 30 each year and totaled $ 313,481,000 at both December 31, 2022 and 2021 , respectively. There was no impairment recorded for the years ended December 31, 2022, 2021 and 2020. The carrying amount of goodwill arising from acquisitions that qualify as an asset purchase for federal income tax purposes was $ 11,233,000 and $ 13,640,000 at December 31, 2022 and 2021 , respectively, and is deductible for federal income tax purposes.
Securities Sold Under Agreements To Repurchase	Securities Sold Under Agreements To Repurchase Securities sold under agreements to repurchase, which are classified as borrowings, generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of the cash received in connection with the transaction. The Company may be required to provide additional collateral based on the estimated fair value of the underlying securities.
Segment Reporting	Segment Reporting The Company has determined that its banking regions meet the aggregation criteria of the current authoritative accounting guidance since each of its banking regions offer similar products and services, operate in a similar manner, have similar customers and report to the same regulatory authority, and therefore operate one line of business (community banking) located in a single geographic area (Texas).
Statements of Cash Flows	Statements of Cash Flows For purposes of reporting cash flows, cash and cash equivalents includes cash on hand, amounts due from banks, including interest-bearing deposits in banks with original maturity of 90 days or less , and federal funds sold.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Unrealized net gains or losses on the Company’s available-for-sale securities, net of applicable income taxes, totaling $ 535,228,000 of losses at December 31, 2022 and $ 99,253,000 of gains at December 31, 2021 , are included in accumulated other comprehensive earnings (loss) as a separate component of shareholders' equity.
Income Taxes	Income Taxes The Company’s provision for income taxes is based on income before income taxes adjusted for permanent differences between financial reporting and taxable income. Deferred tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws.
Stock Based Compensation	Stock Based Compensation The Company grants stock options for a fixed number of shares to employees with an exercise price equal to the fair value using the Black-Scholes model of the shares at the grant date. The grant date fair value is amortized over the vesting period which generally is five or six years. The Company also grants restricted stock and/or units for a fixed number of shares which generally vests over periods of one to three years and/or performance metrics over a three-year period relative to a defined group of peers. For stock option grants, the exercise price is established based on the closing trading price of the Company's common stock and for restricted grants, the fair value of the grant is also measured based on the closing trading price. No adjustments have been necessary to properly value the grant based on the terms or other conditions of the grants. Expense is recognized based on the fair value of the portion of stock-based payment awards that are ultimately expected to vest, reduced for forfeitures based on grant-date fair value. See Note 17 for further information.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred.
Per Share Data	Per Share Data Net earnings per share (“EPS”) are computed by dividing net earnings by the weighted average number of common stock shares outstanding during the period. The Company calculates diluted EPS assuming all outstanding stock options to purchase common shares and unvested restricted stock shares have been exercised and/or vested at the beginning of the year (or the time of issuance, if later.) The dilutive effect of the outstanding options and restricted stock is determined by application of the treasury stock method, whereby the proceeds from the exercised options and unearned compensation for restricted stock are assumed to be used to purchase common shares at the average market price during the respective year. Anti-dilutive shares for the years ended December 31, 2022 and 2020 were 1,261,000 and 399,300 , respectively, and were excluded from the computation of EPS. There were no such anti-dilutive stock options for the year ended December 31, 2021 . The following table reconciles the computation of basic EPS to diluted EPS: For the Year Ended December 31, 2022: Net Earnings Weighted Per Share Net earnings per share, basic $ 234,475 142,596,252 $ 1.64 Effect of stock options and stock grants — 611,647 - Net earnings per share, diluted $ 234,475 143,207,899 $ 1.64 For the Year Ended December 31, 2021: Net earnings per share, basic $ 227,562 142,291,939 $ 1.60 Effect of stock options and stock grants — 842,281 ( 0.01 ) Net earnings per share, diluted $ 227,562 143,134,220 $ 1.59 For the Year Ended December 31, 2020: Net earnings per share, basic $ 202,034 142,032,420 $ 1.42 Effect of stock options and stock grants — 512,571 — Net earnings per share, diluted $ 202,034 142,544,991 $ 1.42
Other Recently Issued and Effective Authoritative Accounting Guidance	Other Recently Issued and Effective Authoritative Accounting Guidance ASU 2019-12,“Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” ASU 2019-12, simplifies the accounting for income taxes by eliminating certain exceptions related to the approach for intra-period tax aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. ASU 2019-12 is effective for the Company for annual reporting periods after December 15, 2020, and interim periods within. Adoption of ASU 2019-12 did not have a significant impact on the Company's financial statements and related disclosures. ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." ASU 2020-04 provides optional expedients and exceptions for accounting related to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 applies only to contracts, hedging relationships, and other transactions that reference the London Interbank Offered Rate ("LIBOR") or another reference rate expected to be discontinued because of reference rate reform and do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. ASU 2020-04 was effective upon issuance and generally can be applied through December 31, 2022. The adoption of ASU 2020-04 did not have a significant impact on our financial statements. ASU 2021-01, "Reference Rate Reform (Topic 848): Scope." ASU 2021-01 clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. ASU 2021-01 was effective upon issuance and generally can be applied through December 31, 2022. The adoption of 2021-01 did not have a significant impact on our financial statements. ASU 2022-02, "Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in ASC Subtopic 310-40, Receivables - Troubled Debt Restructurings by Creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. ASU 2022-02 will also require that an entity disclose current-period gross charge-offs by year of origination for financial receivables and net investment leases within scope of ASC Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost. ASU 2022-02 will become effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, though early adoption is permitted. The adoption of ASU 2022-02 is not expected to have a significant impact on our financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Computation of Basic EPS to Dilutive EPS	The following table reconciles the computation of basic EPS to diluted EPS: For the Year Ended December 31, 2022: Net Earnings Weighted Per Share Net earnings per share, basic $ 234,475 142,596,252 $ 1.64 Effect of stock options and stock grants — 611,647 - Net earnings per share, diluted $ 234,475 143,207,899 $ 1.64 For the Year Ended December 31, 2021: Net earnings per share, basic $ 227,562 142,291,939 $ 1.60 Effect of stock options and stock grants — 842,281 ( 0.01 ) Net earnings per share, diluted $ 227,562 143,134,220 $ 1.59 For the Year Ended December 31, 2020: Net earnings per share, basic $ 202,034 142,032,420 $ 1.42 Effect of stock options and stock grants — 512,571 — Net earnings per share, diluted $ 202,034 142,544,991 $ 1.42

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Summary of Available-for-Sale Securities	The amortized cost, related gross unrealized gains and losses, allowance for credit losses and the fair value of available-for-sale securities are as follows (dollars in thousands): December 31, 2022 Amortized Gross Gross Estimated Securities available-for-sale: U.S. Treasury securities $ 508,275 $ 11 $ ( 25,737 ) $ 482,549 Obligations of state and political subdivisions 2,104,193 1,217 ( 206,799 ) 1,898,611 Residential mortgage-backed securities 3,034,120 8 ( 417,562 ) 2,616,566 Commercial mortgage-backed securities 392,914 1 ( 18,046 ) 374,869 Corporate bonds and other 112,846 — ( 11,082 ) 101,764 Total securities available-for-sale $ 6,152,348 $ 1,237 $ ( 679,226 ) $ 5,474,359 December 31, 2021 Amortized Gross Gross Estimated Securities available-for-sale: U.S. Treasury securities $ 126,716 $ 125 $ — $ 126,841 Obligations of state and political subdivisions 2,638,369 116,319 ( 1,217 ) 2,753,471 Residential mortgage-backed securities 3,256,746 23,990 ( 21,287 ) 3,259,449 Commercial mortgage-backed securities 356,207 8,914 ( 1 ) 365,120 Corporate bonds and other 69,472 32 ( 1,206 ) 68,298 Total securities available-for-sale $ 6,447,510 $ 149,380 $ ( 23,711 ) $ 6,573,179
Amortized Cost and Estimated Fair Value of Available-for-Sale Securities	The amortized cost and estimated fair value of available-for-sale securities at December 31, 2022, by contractual maturity, are shown below (in thousands): Amortized Estimated Due within one year $ 210,053 $ 207,169 Due after one year through five years 1,741,024 1,632,058 Due after five years through ten years 2,715,108 2,376,526 Due after ten years 1,486,163 1,258,606 Total $ 6,152,348 $ 5,474,359
Continuous Unrealized-Loss Position of Available-for-Sale Securities	The following tables disclose, as of December 31, 2022 and 2021 , the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands): Less than 12 Months 12 Months or Longer Total December 31, 2022 Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury Securities $ 307,012 $ 11,650 $ 173,105 $ 14,087 $ 480,117 $ 25,737 Obligations of state and political 770,469 55,943 946,571 150,856 1,717,040 206,799 Residential mortgage-backed securities 470,970 37,065 2,143,869 380,497 2,614,839 417,562 Commercial mortgage-backed securities 319,303 11,677 54,862 6,369 374,165 18,046 Corporate bonds and other 41,920 1,698 59,844 9,384 101,764 11,082 Total $ 1,909,674 $ 118,033 $ 3,378,251 $ 561,193 $ 5,287,925 $ 679,226 Less than 12 Months 12 Months or Longer Total December 31, 2021 Fair Unrealized Fair Unrealized Fair Unrealized Obligations of state and political $ 163,698 $ 1,096 $ 18,943 $ 122 $ 182,641 $ 1,218 Residential mortgage-backed securities 2,263,010 19,742 54,392 1,544 2,317,402 21,286 Commercial mortgage-backed securities 820 1 — — 820 1 Corporate bonds and other 47,436 635 16,432 571 63,868 1,206 Total $ 2,474,964 $ 21,474 $ 89,767 $ 2,237 $ 2,564,731 $ 23,711

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Loans Held-for-Investment by Portfolio Segment	Loans held-for-investment by portfolio segment are as follows (dollars in thousands): December 31, 2022 2021 Commercial: C&I * $ 917,317 $ 837,075 Municipal 221,090 177,905 Total Commercial 1,138,407 1,014,980 Agricultural 76,947 98,089 Real Estate: Construction & Development 959,426 749,793 Farm 306,322 217,220 Non-Owner Occupied CRE 732,089 623,434 Owner Occupied CRE 954,400 821,653 Residential 1,575,758 1,334,419 Total Real Estate 4,527,995 3,746,519 Consumer: Auto 550,635 405,416 Non-Auto 147,884 123,968 Total Consumer 698,519 529,384 Total Loans 6,441,868 5,388,972 Less: Allowance for credit losses ( 75,834 ) ( 63,465 ) Loans, net $ 6,366,034 $ 5,325,507 * All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet.
Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans	The Company’s nonaccrual loans, loans still accruing and past due 90 days or more and restructured loans are as follows (dollars in thousands): December 31, 2022 2021 Nonaccrual loans $ 24,306 $ 31,652 Loans still accruing and past due 90 days or more — 8 Troubled debt restructured loans* 19 21 Total $ 24,325 $ 31,681 * Troubled debt restructured loans of $ 3,624,000 and $ 6,721,000 , for which interest collection is doubtful, are included in nonaccrual loans as of December 31, 2022 and 2021 , respectively.
Schedule of Non-Accrual Loans	Nonaccrual loans totaled $ 24,306,000 and $ 31,652,000 at December 31, 2022 and 2021, respectively, and consisted of the following (in thousands): December 31, 2022 2021 Commercial: C&I $ 5,057 $ 5,370 Municipal — — Total Commercial 5,057 5,370 Agricultural 324 4,920 Real Estate: Construction & Development 1,567 708 Farm 85 1,173 Non-Owner Occupied CRE 2,321 2,671 Owner Occupied CRE 7,092 7,897 Residential 7,400 8,360 Total Real Estate 18,465 20,809 Consumer: Auto 429 514 Non-Auto 31 39 Total Consumer 460 553 Total $ 24,306 $ 31,652
Changes in Allowance for Loan Losses	Summary information on the allowance for credit losses for the year ended December 31, 2022 and 2021, are outlined by portfolio segment in the following tables (in thousands): Year-ended December 31, 2022 C&I Municipal Agricultural Construction & Farm Beginning balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Provision for loan losses 3,485 678 ( 702 ) 8,916 1,294 Recoveries 953 — 155 — — Charge-offs ( 589 ) — ( 9 ) ( 100 ) — Ending balance $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 Year-ended December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 10,722 $ 10,828 $ 8,133 $ 896 $ 371 $ 63,465 Provision for loan losses ( 2,499 ) ( 1,062 ) 1,014 252 164 11,540 Recoveries 852 699 114 293 215 3,281 Charge-offs — ( 537 ) ( 186 ) ( 596 ) ( 435 ) ( 2,452 ) Ending balance $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 Year-ended December 31, 2021 C&I Municipal Agricultural Construction & Farm Beginning balance $ 13,609 $ 1,552 $ 1,255 $ 13,512 $ 1,876 Provision for loan losses ( 1,879 ) ( 1,204 ) 2,989 4,114 ( 1,323 ) Recoveries 2,150 — 36 1 110 Charge-offs ( 1,600 ) — ( 2,683 ) — — Ending balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Year-ended December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 8,391 $ 12,347 $ 12,601 $ 1,020 $ 371 $ 66,534 Provision for loan losses 1,635 ( 2,109 ) ( 4,471 ) 85 74 ( 2,089 ) Recoveries 702 821 96 401 211 4,528 Charge-offs ( 6 ) ( 231 ) ( 93 ) ( 610 ) ( 285 ) ( 5,508 ) Ending balance 10,722 10,828 8,133 896 371 $ 63,465
Schedule of loans that are individually evaluated for credit losses	The Company’s loans that are individually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of December 31, 2022 and December 31, 2021, are summarized in the following table by loan segment (in thousands): December 31, 2022 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ — $ 5,057 $ 24,325 $ 29,382 $ 3,513 $ 4,885 $ 8,398 Municipal — — 58 58 — — — Total Commercial — 5,057 24,383 29,440 3,513 4,885 8,398 Agricultural 116 209 354 679 122 276 398 Real Estate: Construction & Development 577 990 4,873 6,440 193 112 305 Farm — 85 1,578 1,663 2 34 36 Non-Owner Occupied CRE 2,062 259 36,037 38,358 16 2,341 2,357 Owner Occupied CRE 4,363 2,728 29,115 36,206 91 1,509 1,600 Residential 5,132 2,268 28,583 35,983 229 1,215 1,444 Total Real Estate 12,134 6,330 100,186 118,650 531 5,211 5,742 Consumer: Auto — 429 931 1,360 1 1 2 Non-Auto — 31 538 569 — 1 1 Total Consumer — 460 1,469 1,929 1 2 3 Total $ 12,250 $ 12,056 $ 126,392 $ 150,698 $ 4,167 $ 10,374 $ 14,541 December 31, 2021 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ 749 $ 4,621 $ 19,021 $ 24,391 $ 2,533 $ 4,094 $ 6,627 Municipal — — 109 109 — — — Total Commercial 749 4,621 19,130 24,500 2,533 4,094 6,627 Agricultural 3,026 1,894 478 5,398 1,086 359 1,445 Real Estate: Construction & Development 102 606 4,765 5,473 90 135 225 Farm 997 176 1,969 3,142 — 2 2 Non-Owner Occupied CRE 2,543 128 31,797 34,468 15 4,044 4,059 Owner Occupied CRE 6,548 1,349 40,607 48,504 152 3,329 3,481 Residential 5,990 2,370 29,210 37,570 307 1,719 2,026 Total Real Estate 16,180 4,629 108,348 129,157 564 9,229 9,793 Consumer: Auto — 514 1,161 1,675 1 3 4 Non-Auto — 39 416 455 — 1 1 Total Consumer — 553 1,577 2,130 1 4 5 Total $ 19,955 $ 11,697 $ 129,533 $ 161,185 $ 4,184 $ 13,686 $ 17,870
Schedule of Allowance for Loan Losses by Portfolio Segment	Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. December 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 8,398 $ — $ 398 $ 305 $ 36 Loans collectively evaluated for credit losses 7,731 1,026 643 26,138 1,921 Total $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 2,357 $ 1,600 $ 1,444 $ 2 $ 1 $ 14,541 Loans collectively evaluated for credit losses 6,718 8,328 7,631 843 314 61,293 Total $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 December 31, 2021 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 6,627 $ — $ 1,445 $ 225 $ 2 Loans collectively evaluated for credit losses 5,653 348 152 17,402 661 Total $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 4,059 $ 3,481 $ 2,026 $ 4 $ 1 $ 17,870 Loans collectively evaluated for credit losses 6,663 7,347 6,107 892 370 45,595 Total $ 10,722 $ 10,828 $ 8,133 $ 896 $ 371 $ 63,465
Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology	The Company’s recorded investment in loans as of December 31, 2022 and December 31, 2021, related to the balance in the allowance for credit losses follows below (in thousands). December 31, 2022 C&I Municipal Agriculture Construction & Farm Loans individually evaluated for credit losses $ 29,382 $ 58 $ 679 $ 6,440 $ 1,663 Loans collectively evaluated for credit losses 887,935 221,032 76,268 952,986 304,659 Total $ 917,317 $ 221,090 $ 76,947 $ 959,426 $ 306,322 December 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 38,358 $ 36,206 $ 35,983 $ 1,360 $ 569 $ 150,698 Loans collectively evaluated for credit losses 693,731 918,194 1,539,775 549,275 147,315 6,291,170 Total $ 732,089 $ 954,400 $ 1,575,758 $ 550,635 $ 147,884 $ 6,441,868 December 31, 2021 C&I Municipal Agriculture Construction & Farm Loans individually evaluated for credit losses $ 24,391 $ 109 $ 5,398 $ 5,473 $ 3,142 Loans collectively evaluated for credit losses 812,684 177,796 92,691 744,320 214,078 Total $ 837,075 $ 177,905 $ 98,089 $ 749,793 $ 217,220 December 31, 2021 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 34,468 $ 48,504 $ 37,570 $ 1,675 $ 455 $ 161,185 Loans collectively evaluated for credit losses 588,966 773,149 1,296,849 403,741 123,513 5,227,787 Total $ 623,434 $ 821,653 $ 1,334,419 $ 405,416 $ 123,968 $ 5,388,972
Schedule of Company's Internal Ratings of its Loans Held-for-Investment, Including The Year of Origination, by Portfolio Segments	The following tables summarize the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at December 31, 2022 (in millions): December 31, 2022 2021 2020 2019 2018 Prior Revolving Total C&I Risk rating: Pass $ 627 $ 157 $ 52 $ 22 $ 16 $ 13 $ — $ 887 Special mention 4 1 2 1 — — — 8 Substandard 13 5 2 1 1 — — 22 Doubtful — — — — — — — — Total $ 644 $ 163 $ 56 $ 24 $ 17 $ 13 $ — $ 917 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Municipal Risk rating: Pass $ 79 $ 19 $ 15 $ 4 $ 20 $ 84 $ — $ 221 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 79 $ 19 $ 15 $ 4 $ 20 $ 84 $ — $ 221 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Agricultural Risk rating: Pass $ 60 $ 9 $ 3 $ 2 $ 1 $ 1 $ — $ 76 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 60 $ 10 $ 3 $ 2 $ 1 $ 1 $ — $ 77 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Construction & Development Risk rating: Pass $ 638 $ 218 $ 70 $ 13 $ 8 $ 7 $ — $ 954 Special mention 1 — — — — — — 1 Substandard 4 1 — — — — — 5 Doubtful — — — — — — — — Total $ 643 $ 219 $ 70 $ 13 $ 8 $ 7 $ — $ 960 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Farm Risk rating: Pass $ 147 $ 85 $ 32 $ 11 $ 8 $ 21 $ — $ 304 Special mention — — — — — — — — Substandard 1 — — — — 1 — 2 Doubtful — — — — — — — — Total $ 148 $ 85 $ 32 $ 11 $ 8 $ 22 $ — $ 306 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 258 $ 191 $ 100 $ 49 $ 21 $ 75 $ — $ 694 Special mention — 1 1 11 — 7 — 20 Substandard 8 1 1 2 1 5 — 18 Doubtful — — — — — — — — Total $ 266 $ 193 $ 102 $ 62 $ 22 $ 87 $ — $ 732 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 316 $ 224 $ 128 $ 74 $ 63 $ 113 $ — $ 918 Special mention 1 — 1 8 — 1 — 11 Substandard 1 2 1 2 9 10 — 25 Doubtful — — — — — — — — Total $ 318 $ 226 $ 130 $ 84 $ 72 $ 124 $ — $ 954 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Residential Risk rating: Pass $ 513 $ 355 $ 173 $ 82 $ 64 $ 214 $ 139 $ 1,540 Special mention 1 3 2 — — 3 1 10 Substandard 6 3 2 2 1 9 3 26 Doubtful — — — — — — — — Total $ 520 $ 361 $ 177 $ 84 $ 65 $ 226 $ 143 $ 1,576 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Auto Risk rating: Pass $ 331 $ 131 $ 55 $ 25 $ 6 $ 2 $ — $ 550 Special mention — — — — — — — — Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 331 $ 131 $ 56 $ 25 $ 6 $ 2 $ — $ 551 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Auto Risk rating: Pass $ 85 $ 41 $ 9 $ 3 $ 1 $ 1 $ 7 $ 147 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 85 $ 42 $ 9 $ 3 $ 1 $ 1 $ 7 $ 148 December 31, 2022 2021 2020 2019 2018 Prior Revolving Total Total Loans Risk rating: Pass $ 3,054 $ 1,430 $ 637 $ 285 $ 208 $ 531 $ 146 $ 6,291 Special mention 7 5 6 20 — 11 1 50 Substandard 33 14 7 7 12 25 3 101 Doubtful — — — — — — — — Total $ 3,094 $ 1,449 $ 650 $ 312 $ 220 $ 567 $ 150 $ 6,442 The following tables summarize the Company’s internal ratings of its loans held-for-investment, including the year of origination by portfolio segments, at December 31, 2021 (in millions): December 31, 2021 2020 2019 2018 2017 Prior Revolving Total C&I Risk rating: Pass $ 526 $ 178 $ 52 $ 29 $ 17 $ 11 $ — $ 813 Special mention 4 1 4 — — — — 9 Substandard 7 4 1 3 — — — 15 Doubtful — — — — — — — — Total $ 537 $ 183 $ 57 $ 32 $ 17 $ 11 $ — $ 837 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Municipal Risk rating: Pass $ 39 $ 15 $ 6 $ 22 $ 17 $ 79 $ — $ 178 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 39 $ 15 $ 6 $ 22 $ 17 $ 79 $ — $ 178 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Agricultural Risk rating: Pass $ 69 $ 8 $ 6 $ 6 $ 3 $ 1 $ — $ 93 Special mention — — — — — — — — Substandard 4 1 — — — — — 5 Doubtful — — — — — — — — Total $ 73 $ 9 $ 6 $ 6 $ 3 $ 1 $ — $ 98 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Construction & Development Risk rating: Pass $ 557 $ 134 $ 24 $ 14 $ 7 $ 8 $ — $ 744 Special mention 2 — — — — — — 2 Substandard 2 2 — — — — — 4 Doubtful — — — — — — — — Total $ 561 $ 136 $ 24 $ 14 $ 7 $ 8 $ — $ 750 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Farm Risk rating: Pass $ 117 $ 42 $ 15 $ 10 $ 7 $ 23 $ — $ 214 Special mention — — — — — — — — Substandard 1 1 — 1 — — — 3 Doubtful — — — — — — — — Total $ 118 $ 43 $ 15 $ 11 $ 7 $ 23 $ — $ 217 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 214 $ 128 $ 77 $ 56 $ 31 $ 84 $ — $ 590 Special mention — 1 12 — 7 3 — 23 Substandard — 1 3 1 3 3 — 11 Doubtful — — — — — — — — Total $ 214 $ 130 $ 92 $ 57 $ 41 $ 90 $ — $ 624 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 250 $ 143 $ 114 $ 90 $ 59 $ 117 $ — $ 773 Special mention 2 2 1 — 1 1 — 7 Substandard 8 2 3 13 5 11 — 42 Doubtful — — — — — — — — Total $ 260 $ 147 $ 118 $ 103 $ 65 $ 129 $ — $ 822 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Residential Risk rating: Pass $ 477 $ 230 $ 115 $ 84 $ 68 $ 222 $ 100 $ 1,296 Special mention 3 4 — 1 1 3 1 13 Substandard 3 3 3 2 2 10 2 25 Doubtful — — — — — — — — Total $ 483 $ 237 $ 118 $ 87 $ 71 $ 235 $ 103 $ 1,334 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Auto Risk rating: Pass $ 218 $ 105 $ 54 $ 17 $ 7 $ 2 $ — $ 403 Special mention 1 — — — — — — 1 Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 219 $ 105 $ 55 $ 17 $ 7 $ 2 $ — $ 405 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Non-Auto Risk rating: Pass $ 81 $ 22 $ 8 $ 4 $ 1 $ 1 $ 7 $ 124 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 81 $ 22 $ 8 $ 4 $ 1 $ 1 $ 7 $ 124 December 31, 2021 2020 2019 2018 2017 Prior Revolving Total Total Loans Risk rating: Pass $ 2,548 $ 1,005 $ 471 $ 332 $ 217 $ 548 $ 107 $ 5,228 Special mention 12 8 17 1 9 7 1 55 Substandard 25 14 11 20 10 24 2 106 Doubtful — — — — — — — — Total $ 2,585 $ 1,027 $ 499 $ 353 $ 236 $ 579 $ 110 $ 5,389
Schedule of Past Due Loans	At December 31, 2022 and 2021, the Company’s past due loans are as follows (in thousands): December 31, 2022 15-59 60-89 Greater Total Current Total Loans 90 Days Commercial: C&I $ 3,924 $ 297 $ 1,646 $ 5,867 $ 911,450 $ 917,317 $ — Municipal 76 783 — 859 220,231 221,090 — Total Commercial 4,000 1,080 1,646 6,726 1,131,681 1,138,407 — Agricultural 243 — — 243 76,704 76,947 — Real Estate: Construction & Development 3,751 — 175 3,926 955,500 959,426 — Farm 668 — — 668 305,654 306,322 — Non-Owner Occupied CRE 1,444 160 — 1,604 730,485 732,089 — Owner Occupied CRE 1,151 — — 1,151 953,249 954,400 — Residential 8,720 707 266 9,693 1,566,065 1,575,758 — Total Real Estate 15,734 867 441 17,042 4,510,953 4,527,995 — Consumer: Auto 779 30 — 809 549,826 550,635 — Non-Auto 50 — — 50 147,834 147,884 — Total Consumer 829 30 — 859 697,660 698,519 — Total $ 20,806 $ 1,977 $ 2,087 $ 24,870 $ 6,416,998 $ 6,441,868 $ — December 31, 2021 15-59 60-89 Greater Total Current Total Loans 90 Days Commercial: C&I $ 3,638 $ 34 $ 222 $ 3,894 $ 833,181 $ 837,075 $ 5 Municipal 63 — — 63 177,842 177,905 — Total Commercial 3,701 34 222 3,957 1,011,023 1,014,980 5 Agricultural 181 — — 181 97,908 98,089 — Real Estate: Construction & Development 2,953 39 — 2,992 746,801 749,793 — Farm 600 215 — 815 216,405 217,220 — Non-Owner Occupied CRE 235 — — 235 623,199 623,434 — Owner Occupied CRE 813 — 280 1,093 820,560 821,653 — Residential 4,984 327 410 5,721 1,328,698 1,334,419 — Total Real Estate 9,585 581 690 10,856 3,735,663 3,746,519 — Consumer: Auto 393 26 — 419 404,997 405,416 — Non-Auto 145 24 3 172 123,796 123,968 3 Total Consumer 538 50 3 591 528,793 529,384 3 Total $ 14,005 $ 665 $ 915 $ 15,585 $ 5,373,387 $ 5,388,972 $ 8 * The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.
Schedule of Loans Modified and Considered Troubled Debt Restructurings	The Company’s loans that were modified in the years ended December 31, 2022 and 2021, and considered troubled debt restructurings are as follows (in thousands): Year Ended December 31, 2022 Year Ended December 31, 2021 Pre- Post- Pre- Post- Recorded Recorded Recorded Recorded Number Investment Investment Number Investment Investment Commercial: C&I 1 $ 206 $ 206 4 $ 361 $ 361 Municipal — — — — — — Total Commercial 1 206 206 4 361 361 Agricultural — — — 4 3,988 3,988 Real Estate: Construction & Development — — — 1 200 200 Farm — — — — — — Non-Owner Occupied CRE — — — — — — Owner Occupied CRE 1 1,788 1,788 3 1,047 1,047 Residential 1 129 129 5 519 519 Total Real Estate 2 1,917 1,917 9 1,766 1,766 Consumer: Auto — — — 2 51 51 Non-Auto — — — 1 9 9 Total Consumer — — — 3 60 60 Total 3 $ 2,123 $ 2,123 20 $ 6,175 $ 6,175
Schedule of How Loans Were Modified as Troubled Debt Restructured Loans	The balances below provide information as to how the loans were modified as troubled debt restructured loans during the years ended December 31, 2022 and 2021 (in thousands): Year Ended December 31, 2022 Year Ended December 31, 2021 Adjusted Combined Adjusted Combined Interest Extended Rate and Interest Extended Rate and Rate Maturity Maturity Rate Maturity Maturity Commercial: C&I $ — $ — $ 206 $ — $ 212 $ 149 Municipal — — — — — — Total Commercial — — 206 — 212 149 Agricultural — — — — 68 3,920 Real Estate: Construction & Development — — — — 200 — Farm — — — — — — Non-Owner Occupied CRE — — — — — — Owner Occupied CRE — — 1,788 — — 1,047 Residential — — 129 — 262 257 Total Real Estate — — 1,917 — 462 1,304 Consumer: Auto — — — — — 51 Non-Auto — — — — — 9 Total Consumer — — — — — 60 Total $ — $ — $ 2,123 $ — $ 742 $ 5,433
Analysis of Changes in Loans to Officers, Directors, Principal Shareholders, or Associates of Such Persons	An analysis of the changes in loans to officers, directors, principal shareholders, or associates of such persons for the year ended December 31, 2022 (determined as of each respective year-end) follows (in thousands): Beginning Additional Payments Ending Year Ended December 31, 2022 $ 137,527 $ 233,232 $ 262,992 $ 107,767

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions	These financial instruments are not designated as hedging instruments for accounting purposes. All derivatives are carried at fair value in either other assets or other liabilities, which changes in fair value recorded through earnings in the statement of earnings. The following table provides the outstanding notional balances and fair values of outstanding derivative positions (in thousands): December 31, 2022: Outstanding Asset Liability IRLCs $ 41,664 $ 400 $ — Forward mortgage-backed securities trades 45,000 85 — December 31, 2021: Outstanding Asset Liability IRLCs $ 85,973 $ 1,279 $ — Forward mortgage-backed securities trades 116,000 — 147

Bank Premises and Equipment (Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Summary of Bank Premises and Equipment	The following is a summary of bank premises and equipment (in thousands): Useful Life December 31, 2022 2021 Land — $ 38,703 $ 38,380 Buildings 20 to 40 years 164,371 156,350 Furniture and equipment 3 to 10 years 62,715 60,083 Leasehold improvements Lesser of lease term 5 to 15 years 2,949 2,949 268,738 257,762 Less: accumulated depreciation and amortization ( 115,765 ) ( 107,998 ) Total bank premises and equipment $ 152,973 $ 149,764

Deposits and Borrowings (Tables

Deposits and Borrowings (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Scheduled Maturities of Time Deposits	At December 31, 2022, the scheduled maturities of time deposits (in thousands) were, as follows: Year ending December 31, 2023 460,755 2024 30,742 2025 15,169 2026 9,226 2027 8,774 Thereafter — $ 524,666
Schedule of Borrowings	Borrowings at December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Securities sold under agreements with customers to $ 618,829 $ 625,499 Federal funds purchased 2,625 24,600 Other borrowings 21,053 21,053 Total $ 642,507 $ 671,152

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Tax Expense	The Company files a consolidated federal income tax return. Income tax expense is comprised of the following (in thousands): Year Ended December 31, 2022 2021 2020 Current federal income tax $ 50,429 $ 40,527 $ 45,133 Current state income tax 175 350 447 Deferred federal income tax expense (benefit) ( 4,205 ) 3,531 ( 5,249 ) Income tax expense $ 46,399 $ 44,408 $ 40,331
Percentage of Pretax Earnings, Differs from Statutory Federal Income Tax Rate	Income tax expense, as a percentage of pretax earnings, differs from the statutory federal income tax rate as follows: As a Percent of Pretax Earnings 2022 2021 2020 Statutory federal income tax rate 21.0 % 21.0 % 21.0 % Reductions in tax rate resulting from interest income ( 4.4 ) ( 4.7 ) ( 4.6 ) Other ( 0.1 ) 0.0 0.2 Effective income tax rate 16.5 % 16.3 % 16.6 %
Schedule of Deferred Tax Assets and Liabilities	The approximate effects of each type of difference that gave rise to the Company’s deferred tax assets and liabilities at December 31, 2022 and 2021 are as follows (in thousands): 2022 2021 Deferred tax assets: Tax basis of loans in excess of financial statement basis $ 19,474 $ 15,607 Recognized for financial reporting purposes but not yet 3,303 2,933 Net unrealized loss on investment securities available-for- 142,276 — Other deferred tax assets 1,038 831 Total deferred tax assets $ 166,091 $ 19,371 Deferred tax liabilities: Financial statement basis of fixed assets in excess of tax $ 6,019 $ 6,178 Intangible asset amortization deductible for tax purposes, 13,866 13,594 Recognized for financial reporting purposes but not yet 644 499 Net unrealized gain on investment securities available-for- — 26,384 Other deferred tax liabilities 51 69 Total deferred tax liabilities $ 20,580 $ 46,724 Net deferred tax asset (liability) $ 145,511 $ ( 27,353 )

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s available-for-sale securities, loans held-for-sale, and derivatives which are measured at fair value on a recurring basis as of December 31, 2022 and 2021 segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): December 31, 2022 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 482,549 $ — $ — $ 482,549 Obligations of state and political subdivisions — 1,898,611 — 1,898,611 Corporate bonds — 97,850 — 97,850 Residential mortgage-backed securities — 2,616,566 — 2,616,566 Commercial mortgage-backed securities — 374,869 — 374,869 Other securities 3,914 — — 3,914 Total $ 486,463 $ 4,987,896 $ — $ 5,474,359 Loans held-for-sale $ — $ 10,497 $ — $ 10,497 IRLCs $ — $ 400 $ — $ 400 Forward mortgage-backed securities traded $ — $ 85 $ — $ 85 December 31, 2021 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 126,841 $ — $ — $ 126,841 Obligations of state and political subdivisions — 2,753,471 — 2,753,471 Corporate bonds — 63,868 — 63,868 Residential mortgage-backed securities — 3,259,449 — 3,259,449 Commercial mortgage-backed securities — 365,120 — 365,120 Other securities 4,430 — — 4,430 Total $ 131,271 $ 6,441,908 $ — $ 6,573,179 Loans held-for-sale $ — $ 34,122 $ — $ 34,122 IRLCs $ — $ 1,279 $ — $ 1,279 Forward mortgage-backed securities traded $ — $ ( 147 ) $ — $ ( 147 )
Summary of Loans Held-for-Sale at Fair Value	The following table summarizes the Company’s loans held-for-sale at fair value and the net unrealized gains as of the balance sheet dates shown below (in thousands): December 31, 2022 2021 Unpaid principal balance on loans held-for-sale $ 10,226 $ 33,200 Net unrealized gains on loans held-for-sale 271 922 Loans held-for-sale at fair value $ 10,497 $ 34,122
Summary of Gain Loss on Sale of Mortgage Loans	The following table summarizes the Company’s gains on sale and fees of mortgage loans for the years ended December 31, 2022, 2021 and 2020 (in thousands): Years ended December 31, 2022 2021 2020 Realized gain on sale and fees on mortgage loans* $ 20,357 $ 37,091 $ 39,378 Change in fair value on loans held-for-sale and IRLCs ( 1,554 ) ( 5,259 ) 5,900 Change in forward mortgage-backed securities trades 232 1,413 ( 1,406 ) Total gain on sale of mortgage loans $ 19,035 $ 33,245 $ 43,872 * This includes gain on loans held-for-sale carried under the fair value method and lower of cost or market.
Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments	The estimated fair values and carrying values of all financial instruments under current authoritative guidance at December 31, 2022 and 2021, were as follows (in thousands): 2022 2021 Carrying Estimated Carrying Estimated Fair Value Value Fair Value Value Fair Value Hierarchy Cash and due from banks $ 293,286 $ 293,286 $ 205,053 $ 205,053 Level 1 Interest-bearing demand deposits in banks 37,392 37,392 323,535 323,535 Level 1 Available-for-sale securities 5,474,359 5,474,359 6,573,179 6,573,179 Levels 1 and 2 Loans held-for-investment, net of allowance for 6,366,034 6,372,859 5,325,507 5,335,791 Level 3 Loans held-for-sale 11,965 11,965 37,810 37,844 Level 2 Accrued interest receivable 58,162 58,162 57,169 57,169 Level 2 Deposits with stated maturities 524,666 518,811 461,415 462,312 Level 2 Deposits with no stated maturities 10,480,841 10,480,841 10,105,073 10,105,073 Level 1 Borrowings 642,507 642,507 671,152 671,152 Level 2 Accrued interest payable 1,121 1,121 221 221 Level 2 IRLCs 400 400 1,279 1,279 Level 2 Forward mortgage-backed securities trades 85 85 ( 147 ) ( 147 ) Level 2

Financial Instruments with Of_2

Financial Instruments with Off-Balance-Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2022
Text Block [Abstract]
Schedule of Financial Instruments with Off-Balance-Sheet Risk	We generally use the same credit policies in making commitments and conditional obligations as we do for on-balance sheet instruments. December 31, 2022 (in thousands) Financial instruments whose contract amounts represent credit risk: Unfunded lines of credit $ 1,103,286 Unfunded commitments to extend credit 916,287 Standby letters of credit 43,698 Total commitments $ 2,063,271 The above table also does not include balances related to the Company’s IRLCs and forward mortgage-backed security trades.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Schedule of Regulatory Capital Ratios Under the Basel III Regulatory Capital Framework	As of December 31, 2022 and 2021, the regulatory capital ratios of the Company and Bank under the Basel III regulatory capital framework are as follows: Actual Minimum Capital Required to be As of December 31, 2022: Amount Ratio Amount Ratio Amount Ratio Total Capital to Risk-Weighted Assets: Consolidated $ 1,586,888 19.29 % $ 863,622 10.50 % $ 822,497 10.00 % First Financial Bank, N.A $ 1,442,902 17.58 % $ 861,860 10.50 % $ 820,819 10.00 % Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,498,731 18.22 % $ 699,122 8.50 % $ 493,498 6.00 % First Financial Bank, N.A $ 1,354,745 16.50 % $ 697,696 8.50 % $ 656,655 8.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,498,731 18.22 % $ 575,748 7.00 % — N/A First Financial Bank, N.A $ 1,354,745 16.50 % $ 574,573 7.00 % $ 533,532 6.50 % Leverage Ratio: Consolidated $ 1,498,731 10.96 % $ 546,983 4.00 % — N/A First Financial Bank, N.A $ 1,354,745 9.95 % $ 544,886 4.00 % $ 681,107 5.00 % Actual Minimum Capital Required to be As of December 31, 2021: Amount Ratio Amount Ratio Amount Ratio Total Capital to Risk-Weighted Assets: Consolidated $ 1,425,907 20.34 % $ 736,003 10.50 % $ 700,955 10.00 % First Financial Bank, N.A $ 1,258,965 17.99 % $ 734,604 10.50 % $ 699,623 10.00 % Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,356,006 19.35 % $ 595,812 8.50 % $ 420,573 6.00 % First Financial Bank, N.A $ 1,189,064 17.00 % $ 594,679 8.50 % $ 559,698 8.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets: Consolidated $ 1,356,006 19.35 % $ 490,669 7.00 % — N/A First Financial Bank, N.A $ 1,189,064 17.00 % $ 489,736 7.00 % $ 454,755 6.50 % Leverage Ratio: Consolidated $ 1,356,006 11.13 % $ 487,459 4.00 % — N/A First Financial Bank, N.A $ 1,189,064 9.79 % $ 485,926 4.00 % $ 607,407 5.00 %

Stock Based Compensation (Table

Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Change in Restricted Stock Unit	The following table summarizes information about the changes in restricted stock units for the years ended December 31, 2022 and 2021, respectively. There was no restricted stock unit activity for the year ended December 31, 2020. For the year ended For the year ended December 31, 2022 December 31, 2021 Restricted Weighted Restricted Weighted Balance at beginning of period 22,597 $ 48.91 — $ — Grants 24,833 47.19 22,597 48.91 Vesting ( 7,425 ) 48.91 — — Forfeited/expired ( 348 ) 48.91 — — Balance at end of period 39,657 $ 47.83 22,597 $ 48.91 Performance Stock Units Also under the 2021 Plan
Schedule of Change in Performance Stock Units	The following table summarizes information about the changes in PSUs as of and for the years ended December 31, 2022 and 2021, respectively. There was no PSU activity during the years ended December 31, 2020. For the year ended For the year ended December 31, 2022 December 31, 2021 Performance-Based Restricted Weighted Performance-Based Restricted Weighted Balance at beginning of period 22,597 $ 48.91 — $ — Grants 24,833 47.19 22,597 48.91 Vesting — — — — Forfeited/expired ( 348 ) 48.91 — — Balance at end of period 47,082 $ 48.00 22,597 $ 48.91
Schedule of Analysis of Stock Option Activity	An analysis of stock option activity for the year ended December 31, 2022 is presented in the table and narrative below: Shares Weighted- Weighted- Aggregate Outstanding, beginning of year 1,669,976 $ 25.11 Granted 240,583 47.19 Exercised ( 355,692 ) 18.42 Cancelled ( 64,454 ) 31.56 Outstanding, end of year 1,490,413 29.99 5.86 $ 12,519 Exercisable at end of year 770,401 $ 22.12 4.16 $ 10,057
Schedule of Information Concerning Outstanding and Vested Stock Options	The following table summarizes information concerning outstanding and vested stock options as of December 31, 2022: Exercise Number Remaining Number Vested $ 15.43 68,785 0.8 68,785 $ 16.95 226,781 2.8 226,781 $ 21.18 440,060 4.4 324,440 $ 29.70 306,125 6.5 107,495 $ 34.55 10,950 7.1 1,950 $ 48.91 199,979 8.6 40,950 $ 47.19 237,733 9.6 —
Summary of Vested and Unvested Restricted Stock Outstanding	The following table summarizes information about vested and unvested restricted stock. For the year ended For the year ended For the year ended December 31, 2022 December 31, 2021 December 31, 2020 Restricted Weighted Restricted Weighted Restricted Weighted Balance at beginning of period 46,598 $ 35.75 95,888 $ 29.89 105,309 $ 29.93 Grants 15,425 40.89 12,110 49.58 56,480 29.22 Vesting ( 37,010 ) 37.61 ( 60,011 ) 29.25 ( 65,662 ) 29.39 Forfeited/expired ( 200 ) 29.70 ( 1,389 ) 32.76 ( 239 ) 29.70 Balance at end of period 24,813 $ 36.21 46,598 $ 35.75 95,888 $ 29.89

Condensed Financial Informati_2

Condensed Financial Information - Parent Company (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets - December 31, 2022 and 2021 ASSETS 2022 2021 Cash in subsidiary bank (1) $ 50,204 $ 83,547 Cash in unaffiliated banks (1) 2 2 Interest-bearing deposits in subsidiary bank (1) 69,053 68,814 Total cash and cash equivalents 119,259 152,363 Securities available-for-sale, at fair value 2,235 2,489 Investment in and advances to subsidiaries, at equity (1) 1,171,095 1,629,387 Intangible assets 723 723 Other assets 5,355 3,610 Total assets $ 1,298,667 $ 1,788,572 LIABILITIES AND SHAREHOLDERS’ EQUITY Total liabilities $ 32,930 $ 29,348 Shareholders’ equity: Common stock 1,427 1,425 Capital surplus 677,593 676,871 Retained earnings 1,121,945 981,675 Treasury stock ( 11,035 ) ( 10,090 ) Deferred compensation 11,035 10,090 Accumulated other comprehensive earnings ( 535,228 ) 99,253 Total shareholders’ equity 1,265,737 1,759,224 Total liabilities and shareholders’ equity $ 1,298,667 $ 1,788,572 (1) Eliminates in consolidation.
Condensed Statements of Earnings	Condensed Statements of Earnings - For the Years Ended December 31, 2022, 2021 and 2020 2022 2021 2020 Income: Cash dividends from subsidiaries (1) $ 67,500 $ 96,500 $ 87,500 Excess of earnings over dividends of subsidiaries (1) 174,741 140,441 122,997 Other 62 279 8,368 Total income 242,303 237,220 218,865 Expenses: Salaries and employee benefits 6,541 7,374 13,795 Other operating expenses 4,106 5,262 5,599 Total expense 10,647 12,636 19,394 Earnings before income taxes 231,656 224,584 199,471 Income tax benefit 2,819 2,978 2,563 Net earnings $ 234,475 $ 227,562 $ 202,034 (1) Eliminates in consolidation .
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows - For the Years Ended December 31, 2022, 2021 and 2020 2022 2021 2020 Cash flows from operating activities: Net earnings $ 234,475 $ 227,562 $ 202,034 Adjustments to reconcile net earnings to Excess of earnings over dividends of subsidiaries ( 174,741 ) ( 140,441 ) ( 122,997 ) Depreciation and amortization, net 188 189 198 Gain on sale of assets, net — — ( 38 ) Decrease (increase) in other assets 645 ( 693 ) 164 Increase (decrease) in other liabilities 933 2,997 2,083 Other — ( 4 ) 35 Net cash provided by operating activities 61,500 89,610 81,479 Cash flows from investing activities: Maturity of available-for-sale securities — — 3,720 Purchases of bank premises and equipment and software ( 385 ) ( 106 ) — Net cash provided by (used in) investing activities ( 385 ) ( 106 ) 3,720 Cash flows from financing activities: Proceeds from stock option exercises 6,545 5,905 4,717 Cash dividends paid ( 91,315 ) ( 79,712 ) ( 70,318 ) Repurchase of stock ( 9,449 ) — ( 8,008 ) Net cash used in financing activities ( 94,219 ) ( 73,807 ) ( 73,609 ) Net increase in cash and cash equivalents ( 33,104 ) 15,697 11,590 Cash and cash equivalents, beginning of year 152,363 136,666 125,076 Cash and cash equivalents, end of year $ 119,259 $ 152,363 $ 136,666

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2022
Business Combinations [Abstract]
Schedule of Preliminary Estimated Fair Value Amounts Assigned to Major Asset and Liability Categories at Acquisition Date	The following table presents the preliminary amounts recorded on the consolidated balance sheet on the acquisition date (dollars in thousands): Fair value of consideration paid: Common stock issued ( 6,275,574 shares) $ 220,273 Fair value of identifiable assets acquired: Cash and cash equivalents $ 61,028 Securities available-for-sale 93,967 Loans 447,702 Identifiable intangible assets 4,798 Other assets 25,377 Total identifiable assets acquired $ 632,872 Fair value of liabilities assumed: Deposits $ 549,125 Other liabilities 5,397 Total liabilities assumed $ 554,522 Fair value of net identifiable assets acquired 78,350 Goodwill resulting from acquisition $ 141,923

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	7 Months Ended	12 Months Ended
	Jul. 27, 2021 $ / shares shares	Dec. 31, 2022 USD ($) Location $ / shares shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Sep. 30, 2021 shares	Mar. 27, 2020 USD ($)	Jan. 01, 2020
Equity Class Of Treasury Stock [Line Items]
Number of locations | Location		79
Common Stock, Shares Authorized | shares		200,000,000	200,000,000
Minimum number of shares that company is required to repurchase | shares		0
Retained earnings net of tax after transitional charges		$ 1,121,945,000	$ 981,675,000			$ 466,000
Minimum number of days to consider the loans as non-accrual		90 days
Amount of allowance for credit loss		$ 0	0
Other identifiable intangible assets, amortized period (years)		7 years
Goodwill and intangible assets with indefinite lives		$ 313,481,000	313,481,000
Impairment recorded		0	0	$ 0
Carrying amount of goodwill arising from acquisitions, is deductible for federal income tax purposes		$ 11,233,000	13,640,000
Securities sold under agreements to repurchase maturity range (in days)		one to four days
Interest-bearing time deposits, maturity period (in days)		90 days or less
Unrealized net gains in available-for-sale securities, included in accumulated other comprehensive income		$ (535,228,000)	99,253,000
First financial antidilutive securities excluded from eps computation | shares		1,261,000		399,300
Average Price of share repurchase | $ / shares	$ 24.75	$ 38.61
Commitments to Extend Credit [Member]
Equity Class Of Treasury Stock [Line Items]
Reserve for unfunded commitments		$ 12,323,000	6,436,000
Held-to-maturity Securities [Member]
Equity Class Of Treasury Stock [Line Items]
Securities held to maturity		0	$ 0
Allowance for Credit Losses [Member]
Equity Class Of Treasury Stock [Line Items]
Increase (decrease) in valuation and qualifying accounts and reserves from adjustment		619,000
Reserve for Unfunded Commitments [Member]
Equity Class Of Treasury Stock [Line Items]
Increase (decrease) in valuation and qualifying accounts and reserves from adjustment		$ 1,208,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Equity Class Of Treasury Stock [Line Items]
Retained earnings net of tax after transitional charges						$ 589,000
Commercial Bancshares Inc and Commercial State Bank [Member]
Equity Class Of Treasury Stock [Line Items]
Percentage of common stock acquired							100%
Common Stock [Member]
Equity Class Of Treasury Stock [Line Items]
Shares repurchased under stock repurchase authorization, shares | shares	324,802	244,559
Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased | shares	5,000,000				4,000,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 234,475	$ 227,562	$ 202,034
Effect of stock options and stock grants, Net Earnings	0	0	0
Net earnings per share, diluted, Net Earnings	$ 234,475	$ 227,562	$ 202,034
Net earnings per share, basic, Weighted Average Shares	142,596,252	142,291,939	142,032,420
Effect of stock options and stock grants, Weighted Average Shares	611,647	842,281	512,571
Net earnings per share, diluted, Weighted Average Shares	143,207,899	143,134,220	142,544,991
NET EARNINGS PER SHARE, BASIC	$ 1.64	$ 1.60	$ 1.42
Effect of stock options and stock grants, Per Share Amount	0	(0.01)
Net earnings per share, diluted, Per Share Amount	$ 1.64	$ 1.59	$ 1.42

Securities - Summary of Availab

Securities - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	$ 6,152,348	$ 6,447,510
Securities available-for-sale, Gross Unrealized Holding Gains	1,237	149,380
Securities available-for-sale, Gross Unrealized Holding Losses	(679,226)	(23,711)
Securities available-for-sale, at fair value	5,474,359	6,573,179
U.S. Treasury securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	508,275	126,716
Securities available-for-sale, Gross Unrealized Holding Gains	11	125
Securities available-for-sale, Gross Unrealized Holding Losses	(25,737)
Securities available-for-sale, at fair value	482,549	126,841
Obligations of State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	2,104,193	2,638,369
Securities available-for-sale, Gross Unrealized Holding Gains	1,217	116,319
Securities available-for-sale, Gross Unrealized Holding Losses	(206,799)	(1,217)
Securities available-for-sale, at fair value	1,898,611	2,753,471
Residential Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	3,034,120	3,256,746
Securities available-for-sale, Gross Unrealized Holding Gains	8	23,990
Securities available-for-sale, Gross Unrealized Holding Losses	(417,562)	(21,287)
Securities available-for-sale, at fair value	2,616,566	3,259,449
Commercial Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	392,914	356,207
Securities available-for-sale, Gross Unrealized Holding Gains	1	8,914
Securities available-for-sale, Gross Unrealized Holding Losses	(18,046)	(1)
Securities available-for-sale, at fair value	374,869	365,120
Corporate Bonds and Other [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	112,846	69,472
Securities available-for-sale, Gross Unrealized Holding Gains	0	32
Securities available-for-sale, Gross Unrealized Holding Losses	(11,082)	(1,206)
Securities available-for-sale, at fair value	$ 101,764	$ 68,298

Securities - Additional Informa

Securities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($) Investment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Interest Bearing Time Deposits In Banks And Securities [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	$ 0	$ 0
Interest-bearing time deposits, maturity period, years		12 months
Number of investment positions | Investment	1,004
Securities pledged as collateral	$ 4,070,454,000	$ 3,644,626,000
Sales of investment securities available-for-sale	479,273,000	10,631,000	$ 263,042,000
Gross realized gains from security sales or calls	6,618,000	$ 815,000	3,637,000
Gross realized losses from security sales or calls	$ 4,474,000		$ 4,000
Obligations of State and Political Subdivisions [Member] | Texas [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Percentage of securities guaranteed by Texas Permanent School Fund	54.77%	53.94%
Obligations of State and Political Subdivisions [Member] | Texas [Member] | Geographic Concentration Risk [Member] | Available-for-Sale Securities [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Concentration risk, percentage	71.86%	72.72%

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Available-for-Sale, Amortized Cost Basis, Due within one year	$ 210,053
Available-for-Sale, Amortized Cost Basis, Due after one year through five years	1,741,024
Available-for-Sale, Amortized Cost Basis, Due after five years through ten years	2,715,108
Available-for-Sale, Amortized Cost Basis, Due after ten years	1,486,163
Available-for-Sale, Amortized Cost Basis, Total	6,152,348	$ 6,447,510
Available-for-Sale, Estimated Fair Value, Due within one year	207,169
Available-for-Sale, Estimated Fair Value, Due after one year through five years	1,632,058
Available-for-Sale, Estimated Fair Value, Due after five years through ten years	2,376,526
Available-for-Sale, Estimated Fair Value, Due after ten years	1,258,606
Securities available-for-sale, Estimated Fair Value, Total	$ 5,474,359	$ 6,573,179

Securities - Continuous Unreali

Securities - Continuous Unrealized-Loss Position of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 1,909,674	$ 2,474,964
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	118,033	21,474
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	3,378,251	89,767
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	561,193	2,237
Available-for-sale securities, continuous unrealized loss position, Fair Value	5,287,925	2,564,731
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	679,226	23,711
U.S. Treasury securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	307,012
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	11,650
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	173,105
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	14,087
Available-for-sale securities, continuous unrealized loss position, Fair Value	480,117
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	25,737
Obligations of State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	770,469	163,698
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	55,943	1,096
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	946,571	18,943
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	150,856	122
Available-for-sale securities, continuous unrealized loss position, Fair Value	1,717,040	182,641
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	206,799	1,218
Residential Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	470,970	2,263,010
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	37,065	19,742
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	2,143,869	54,392
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	380,497	1,544
Available-for-sale securities, continuous unrealized loss position, Fair Value	2,614,839	2,317,402
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	417,562	21,286
Commercial Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	319,303	820
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	11,677	1
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	54,862	0
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	6,369	0
Available-for-sale securities, continuous unrealized loss position, Fair Value	374,165	820
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	18,046	1
Corporate bonds and Other [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	41,920	47,436
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	1,698	635
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	59,844	16,432
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	9,384	571
Available-for-sale securities, continuous unrealized loss position, Fair Value	101,764	63,868
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	$ 11,082	$ 1,206

Loans And Allowance For Credi_3

Loans And Allowance For Credit Losses - Loans Held-for-Investment by Portfolio Segment (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		$ 6,441,868	$ 5,388,972
Less - allowance for credit losses		(75,834)	(63,465)	$ (66,534)
Net loans held – for -investment		6,366,034	5,325,507
Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,138,407	1,014,980
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		76,947	98,089
Less - allowance for credit losses		(1,041)	(1,597)	(1,255)
Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		4,527,995	3,746,519
Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		698,519	529,384
C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		917,317	837,075
Less - allowance for credit losses		(16,129)	(12,280)	(13,609)
C&I [Member] | Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans	[1]	917,317	837,075
Muncipal [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		221,090	177,905
Less - allowance for credit losses		(1,026)	(348)	(1,552)
Muncipal [Member] | Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		221,090	177,905
Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		959,426	749,793
Less - allowance for credit losses		(26,443)	(17,627)	(13,512)
Construction & Development [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		959,426	749,793
Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		306,322	217,220
Less - allowance for credit losses		(1,957)	(663)	(1,876)
Farm [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		306,322	217,220
Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		732,089	623,434
Less - allowance for credit losses		(9,075)	(10,722)	(8,391)
Non - Owner Occupied CRE [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		732,089	623,434
Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		954,400	821,653
Less - allowance for credit losses		(9,928)	(10,828)	(12,347)
Owner Occupied CRE [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		954,400	821,653
Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,575,758	1,334,419
Less - allowance for credit losses		(9,075)	(8,133)	(12,601)
Residential [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,575,758	1,334,419
Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		550,635	405,416
Less - allowance for credit losses		(845)	(896)	(1,020)
Auto [Member] | Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		550,635	405,416
Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		147,884	123,968
Less - allowance for credit losses		(315)	(371)	$ (371)
Non - Auto [Member] | Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		$ 147,884	$ 123,968
[1] All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet.

Loans And Allowance For Credi_4

Loans And Allowance For Credit Losses - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
Loans held by subsidiaries subject to blanket liens	$ 4,154,241,000
Line of credit	0	$ 0
Nonaccrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets	24,325,000	34,158,000
Nonaccrual loans	24,306,000	31,652,000
Interest income recognized on impaired loans	1,607,000	2,122,000	$ 1,006,000
Additional funds advanced in connection with impaired loans	0
Unfunded loan commitments	12,323,000
Provision for loan losses	$ 11,540,000	(2,089,000)
Default for purposes of this disclosure is a troubled debt restructured loan	90 days
Commitments to lend additional funds to borrowers with loan that have been modified as TDRs	$ 0
Total Loans	6,441,868,000	5,388,972,000
Reserve for unfunded commitments (Other liabilities)	12,323,000	6,436,000
Reversal of Provision for credit losses		2,089,000
Available line of credit	2,341,985,000
Federal Home Loan Bank Borrowings [Member]
Accounts Notes And Loans Receivable [Line Items]
Line of credit	0
Residentials Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	459,000
Unfunded Loan Commitment [Member]
Accounts Notes And Loans Receivable [Line Items]
Unfunded loan commitments	$ 5,887,000	$ 950,000

Loans And Allowance For Credi_5

Loans And Allowance For Credit Losses - Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Detail) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Nonaccrual loans		$ 24,306,000	$ 31,652,000
Total 90 Days Past Due Still Accruing		0	8,000
Troubled debt restructured loans*	[1]	19,000	21,000
Total		$ 24,325,000	$ 31,681,000
[1] Troubled debt restructured loans of $ 3,624,000 and $ 6,721,000 , for which interest collection is doubtful, are included in nonaccrual loans as of December 31, 2022 and 2021 , respectively.

Loans And Allowance For Credi_6

Loans And Allowance For Credit Losses- Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Parenthetical) (Detail) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Loans And Leases Receivable Disclosure [Line Items]
Troubled debt restructured loans*	[1]	$ 19,000	$ 21,000
Doubtful [Member]
Loans And Leases Receivable Disclosure [Line Items]
Troubled debt restructured loans*		$ 3,624,000	$ 6,721,000
[1] Troubled debt restructured loans of $ 3,624,000 and $ 6,721,000 , for which interest collection is doubtful, are included in nonaccrual loans as of December 31, 2022 and 2021 , respectively.

Loans And Allowance For Credi_7

Loans And Allowance For Credit Losses - Schedule of Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 24,306	$ 31,652
Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	5,057	5,370
Commercial [Member] | C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	5,057	5,370
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	324	4,920
Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	18,465	20,809
Real Estate [Member] | Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	1,567	708
Real Estate [Member] | Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	85	1,173
Real Estate [Member] | Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	2,321	2,671
Real Estate [Member] | Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	7,092	7,897
Real Estate [Member] | Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	7,400	8,360
Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	460	553
Consumer [Member] | Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	429	514
Consumer [Member] | Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 31	$ 39

Loan And Allowance For Credit L

Loan And Allowance For Credit Losses - Changes in Allowance for Loan Losses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	$ 63,465,000	$ 66,534,000
Provision for loan losses	11,540,000	(2,089,000)
Recoveries	3,281,000	4,528,000
Charge-offs	2,452,000	(5,508,000)
Ending balance	75,834,000	63,465,000
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	1,597,000	1,255,000
Provision for loan losses	(702,000)	2,989,000
Recoveries	155,000	36,000
Charge-offs	9,000	(2,683,000)
Ending balance	1,041,000	1,597,000
C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	12,280,000	13,609,000
Provision for loan losses	3,485,000	(1,879,000)
Recoveries	953,000	2,150,000
Charge-offs	589,000	(1,600,000)
Ending balance	16,129,000	12,280,000
Muncipal [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	348,000	1,552,000
Provision for loan losses	678,000	(1,204,000)
Ending balance	1,026,000	348,000
Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	17,627,000	13,512,000
Provision for loan losses	8,916,000	4,114,000
Recoveries		1,000
Charge-offs	100,000
Ending balance	26,443,000	17,627,000
Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	663,000	1,876,000
Provision for loan losses	1,294,000	(1,323,000)
Recoveries		110,000
Ending balance	1,957,000	663,000
Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	10,722,000	8,391,000
Provision for loan losses	(2,499,000)	1,635,000
Recoveries	852,000	702,000
Charge-offs		(6,000)
Ending balance	9,075,000	10,722,000
Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	10,828,000	12,347,000
Provision for loan losses	(1,062,000)	(2,109,000)
Recoveries	699,000	821,000
Charge-offs	537,000	(231,000)
Ending balance	9,928,000	10,828,000
Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	8,133,000	12,601,000
Provision for loan losses	1,014,000	(4,471,000)
Recoveries	114,000	96,000
Charge-offs	186,000	(93,000)
Ending balance	9,075,000	8,133,000
Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	896,000	1,020,000
Provision for loan losses	252,000	85,000
Recoveries	293,000	401,000
Charge-offs	596,000	(610,000)
Ending balance	845,000	896,000
Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Beginning balance	371,000	371,000
Provision for loan losses	164,000	74,000
Recoveries	215,000	211,000
Charge-offs	435,000	(285,000)
Ending balance	$ 315,000	$ 371,000

Loans And Allowance For Credi_8

Loans And Allowance For Credit Losses - Schedule of loans that are individually evaluated for credit losses (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Impaired [Line Items]
Related Allowance	$ 14,541	$ 17,870
Total Recorded Investment	150,698	161,185
Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	12,250	19,955
Recorded Investment With Allowance	12,056	11,697
Related Allowance	4,167	4,184
Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	10,374	13,686
Total Recorded Investment	126,392	129,533
Commercial [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	8,398	6,627
Total Recorded Investment	29,440	24,500
Commercial [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0	749
Recorded Investment With Allowance	5,057	4,621
Related Allowance	3,513	2,533
Commercial [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	4,885	4,094
Total Recorded Investment	24,383	19,130
Commercial [Member] | C&I [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	8,398	6,627
Total Recorded Investment	29,382	24,391
Commercial [Member] | C&I [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0	749
Recorded Investment With Allowance	5,057	4,621
Related Allowance	3,513	2,533
Commercial [Member] | C&I [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	4,885	4,094
Total Recorded Investment	24,325	19,021
Commercial [Member] | Municipal [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	0	0
Total Recorded Investment	58	109
Commercial [Member] | Municipal [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0
Recorded Investment With Allowance	0
Related Allowance	0	0
Commercial [Member] | Municipal [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	0	0
Total Recorded Investment	58	109
Agricultural [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	398	1,445
Total Recorded Investment	679	5,398
Agricultural [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	116	3,026
Recorded Investment With Allowance	209	1,894
Related Allowance	122	1,086
Agricultural [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	276	359
Total Recorded Investment	354	478
Real Estate [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	5,742	9,793
Total Recorded Investment	118,650	129,157
Real Estate [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	12,134	16,180
Recorded Investment With Allowance	6,330	4,629
Related Allowance	531	564
Real Estate [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	5,211	9,229
Total Recorded Investment	100,186	108,348
Real Estate [Member] | Construction & Development [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	305	225
Total Recorded Investment	6,440	5,473
Real Estate [Member] | Construction & Development [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	577	102
Recorded Investment With Allowance	990	606
Related Allowance	193	90
Real Estate [Member] | Construction & Development [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	112	135
Total Recorded Investment	4,873	4,765
Real Estate [Member] | Farm [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	36	2
Total Recorded Investment	1,663	3,142
Real Estate [Member] | Farm [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0	997
Recorded Investment With Allowance	85	176
Related Allowance	2	0
Real Estate [Member] | Farm [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	34	2
Total Recorded Investment	1,578	1,969
Real Estate [Member] | Non - Owner Occupied CRE [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	2,357	4,059
Total Recorded Investment	38,358	34,468
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	2,062	2,543
Recorded Investment With Allowance	259	128
Related Allowance	16	15
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	2,341	4,044
Total Recorded Investment	36,037	31,797
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1,600	3,481
Total Recorded Investment	36,206	48,504
Real Estate [Member] | Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	4,363	6,548
Recorded Investment With Allowance	2,728	1,349
Related Allowance	91	152
Real Estate [Member] | Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1,509	3,329
Total Recorded Investment	29,115	40,607
Real Estate [Member] | Residential [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1,444	2,026
Total Recorded Investment	35,983	37,570
Real Estate [Member] | Residential [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	5,132	5,990
Recorded Investment With Allowance	2,268	2,370
Related Allowance	229	307
Real Estate [Member] | Residential [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1,215	1,719
Total Recorded Investment	28,583	29,210
Consumer [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	3	5
Total Recorded Investment	1,929	2,130
Consumer [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0
Recorded Investment With Allowance	460	553
Related Allowance	1	1
Consumer [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	2	4
Total Recorded Investment	1,469	1,577
Consumer [Member] | Auto [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	2	4
Total Recorded Investment	1,360	1,675
Consumer [Member] | Auto [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0
Recorded Investment With Allowance	429	514
Related Allowance	1	1
Consumer [Member] | Auto [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1	3
Total Recorded Investment	931	1,161
Consumer [Member] | Non - Auto [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1	1
Total Recorded Investment	569	455
Consumer [Member] | Non - Auto [Member] | Collateral Pledged [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment With No Allowance	0
Recorded Investment With Allowance	31	39
Related Allowance	0	0
Consumer [Member] | Non - Auto [Member] | Uncollateralized [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	1	1
Total Recorded Investment	$ 538	$ 416

Loan And Allowance For Credit_2

Loan And Allowance For Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 14,541	$ 17,870
Loans collectively evaluated for credit losses	61,293	45,595
Total allowance for loan losses	75,834	63,465	$ 66,534
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	398	1,445
Loans collectively evaluated for credit losses	643	152
Total allowance for loan losses	1,041	1,597	1,255
C&I [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	8,398	6,627
Loans collectively evaluated for credit losses	7,731	5,653
Total allowance for loan losses	16,129	12,280	13,609
Muncipal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	0	0
Loans collectively evaluated for credit losses	1,026	348
Total allowance for loan losses	1,026	348	1,552
Construction & Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	305	225
Loans collectively evaluated for credit losses	26,138	17,402
Total allowance for loan losses	26,443	17,627	13,512
Farm [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	36	2
Loans collectively evaluated for credit losses	1,921	661
Total allowance for loan losses	1,957	663	1,876
Non - Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,357	4,059
Loans collectively evaluated for credit losses	6,718	6,663
Total allowance for loan losses	9,075	10,722	8,391
Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,600	3,481
Loans collectively evaluated for credit losses	8,328	7,347
Total allowance for loan losses	9,928	10,828	12,347
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,444	2,026
Loans collectively evaluated for credit losses	7,631	6,107
Total allowance for loan losses	9,075	8,133	12,601
Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	2	4
Loans collectively evaluated for credit losses	843	892
Total allowance for loan losses	845	896	1,020
Non - Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1	1
Loans collectively evaluated for credit losses	314	370
Total allowance for loan losses	$ 315	$ 371	$ 371

Loan And Allowance For Credit_3

Loan And Allowance For Credit Losses - Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		$ 150,698	$ 161,185
Loans collectively evaluated for credit losses		6,291,170	5,227,787
Total Loans		6,441,868	5,388,972
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		679	5,398
Loans collectively evaluated for credit losses		76,268	92,691
Total Loans		76,947	98,089
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		1,138,407	1,014,980
Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		4,527,995	3,746,519
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		698,519	529,384
C&I [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		29,382	24,391
Loans collectively evaluated for credit losses		887,935	812,684
Total Loans		917,317	837,075
C&I [Member] | Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	[1]	917,317	837,075
Muncipal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		58	109
Loans collectively evaluated for credit losses		221,032	177,796
Total Loans		221,090	177,905
Muncipal [Member] | Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		221,090	177,905
Construction & Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		6,440	5,473
Loans collectively evaluated for credit losses		952,986	744,320
Total Loans		959,426	749,793
Construction & Development [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		959,426	749,793
Farm [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		1,663	3,142
Loans collectively evaluated for credit losses		304,659	214,078
Total Loans		306,322	217,220
Farm [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		306,322	217,220
Non - Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		38,358	34,468
Loans collectively evaluated for credit losses		693,731	588,966
Total Loans		732,089	623,434
Non - Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		732,089	623,434
Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		36,206	48,504
Loans collectively evaluated for credit losses		918,194	773,149
Total Loans		954,400	821,653
Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		954,400	821,653
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		35,983	37,570
Loans collectively evaluated for credit losses		1,539,775	1,296,849
Total Loans		1,575,758	1,334,419
Residential [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		1,575,758	1,334,419
Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		1,360	1,675
Loans collectively evaluated for credit losses		549,275	403,741
Total Loans		550,635	405,416
Auto [Member] | Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		550,635	405,416
Non - Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses		569	455
Loans collectively evaluated for credit losses		147,315	123,513
Total Loans		147,884	123,968
Non - Auto [Member] | Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans		$ 147,884	$ 123,968
[1] All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet.

Loans And Allowance For Credi_9

Loans And Allowance For Credit Losses - Schedule of Company's Internal Ratings of its Loans Held-for-Investment, Including The Year of Origination, by Portfolio Segments (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
2022-2021	$ 3,094	$ 2,585
2021-2020	1,449	1,027
2020-2019	650	499
2019-2018	312	353
2018-2017	220	236
Prior	567	579
Revolving Loans Amort Cost Basis	150	110
Total Past Due	6,442	5,389
Agricultural [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	60	73
2021-2020	10	9
2020-2019	2	6
2019-2018	3	6
2018-2017	1	3
Prior	1	1
Total Past Due	77	98
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	3,054	2,548
2021-2020	1,430	1,005
2020-2019	637	471
2019-2018	285	332
2018-2017	208	217
Prior	531	548
Revolving Loans Amort Cost Basis	146	107
Total Past Due	6,291	5,228
Pass [Member] | Agricultural [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	60	69
2021-2020	9	8
2020-2019	2	6
2019-2018	3	6
2018-2017	1	3
Prior	1	1
Total Past Due	76	93
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	7	12
2021-2020	5	8
2020-2019	6	17
2019-2018	20	1
2018-2017		9
Prior	11	7
Revolving Loans Amort Cost Basis	1	1
Total Past Due	50	55
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	33	25
2021-2020	14	14
2020-2019	7	11
2019-2018	7	20
2018-2017	12	10
Prior	25	24
Revolving Loans Amort Cost Basis	3	2
Total Past Due	101	106
Substandard [Member] | Agricultural [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	0	4
2021-2020	1	1
Total Past Due	1	5
C&I [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	644	537
2021-2020	163	183
2020-2019	56	57
2019-2018	24	32
2018-2017	17	17
Prior	13	11
Total Past Due	917	837
C&I [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	627	526
2021-2020	157	178
2020-2019	52	52
2019-2018	22	29
2018-2017	16	17
Prior	13	11
Total Past Due	887	813
C&I [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	4	4
2021-2020	1	1
2020-2019	2	4
2019-2018	1
2018-2017	0
Total Past Due	8	9
C&I [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	13	7
2021-2020	5	4
2020-2019	2	1
2019-2018	1	3
2018-2017	1
Total Past Due	22	15
Muncipal [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	79	39
2021-2020	19	15
2020-2019	15	6
2019-2018	4	22
2018-2017	20	17
Prior	84	79
Total Past Due	221	178
Muncipal [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	79	39
2021-2020	19	15
2020-2019	15	6
2019-2018	4	22
2018-2017	20	17
Prior	84	79
Total Past Due	221	178
Construction & Development [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	643	561
2021-2020	219	136
2020-2019	70	24
2019-2018	13	14
2018-2017	8	7
Prior	7	8
Total Past Due	960	750
Construction & Development [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	638	557
2021-2020	218	134
2020-2019	70	24
2019-2018	13	14
2018-2017	8	7
Prior	7	8
Total Past Due	954	744
Construction & Development [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	1	2
2021-2020	0
Total Past Due	1	2
Construction & Development [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	4	2
2021-2020	1	2
Total Past Due	5	4
Farm [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	148	118
2021-2020	85	43
2020-2019	32	15
2019-2018	11	11
2018-2017	8	7
Prior	22	23
Total Past Due	306	217
Farm [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	147	117
2021-2020	85	42
2020-2019	32	15
2019-2018	11	10
2018-2017	8	7
Prior	21	23
Total Past Due	304	214
Farm [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	1	1
2021-2020	0	1
2019-2018	0	1
Prior	1
Total Past Due	2	3
Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	266	214
2021-2020	193	130
2020-2019	102	92
2019-2018	62	57
2018-2017	22	41
Prior	87	90
Total Past Due	732	624
Non - Owner Occupied CRE [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	258	214
2021-2020	191	128
2020-2019	100	77
2019-2018	49	56
2018-2017	21	31
Prior	75	84
Total Past Due	694	590
Non - Owner Occupied CRE [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	0
2021-2020	1	1
2020-2019	1	12
2019-2018	11	0
2018-2017	0	7
Prior	7	3
Total Past Due	20	23
Non - Owner Occupied CRE [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	8
2021-2020	1	1
2020-2019	1	3
2019-2018	2	1
2018-2017	1	3
Prior	5	3
Total Past Due	18	11
Owner Occupied CRE [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	318	260
2021-2020	226	147
2020-2019	130	118
2019-2018	84	103
2018-2017	72	65
Prior	124	129
Total Past Due	954	822
Owner Occupied CRE [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	316	250
2021-2020	224	143
2020-2019	128	114
2019-2018	74	90
2018-2017	63	59
Prior	113	117
Total Past Due	918	773
Owner Occupied CRE [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	1	2
2021-2020	0	2
2020-2019	1	1
2019-2018	8
2018-2017	0	1
Prior	1	1
Total Past Due	11	7
Owner Occupied CRE [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	1	8
2021-2020	2	2
2020-2019	1	3
2019-2018	2	13
2018-2017	9	5
Prior	10	11
Total Past Due	25	42
Residential [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	520	483
2021-2020	361	237
2020-2019	177	118
2019-2018	84	87
2018-2017	65	71
Prior	226	235
Revolving Loans Amort Cost Basis	143	103
Total Past Due	1,576	1,334
Residential [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	513	477
2021-2020	355	230
2020-2019	173	115
2019-2018	82	84
2018-2017	64	68
Prior	214	222
Revolving Loans Amort Cost Basis	139	100
Total Past Due	1,540	1,296
Residential [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	1	3
2021-2020	3	4
2020-2019	2
2019-2018	0	1
2018-2017	0	1
Prior	3	3
Revolving Loans Amort Cost Basis	1	1
Total Past Due	10	13
Residential [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	6	3
2021-2020	3	3
2020-2019	2	3
2019-2018	2	2
2018-2017	1	2
Prior	9	10
Revolving Loans Amort Cost Basis	3	2
Total Past Due	26	25
Auto [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	331	219
2021-2020	131	105
2020-2019	56	55
2019-2018	25	17
2018-2017	6	7
Prior	2	2
Total Past Due	551	405
Auto [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	331	218
2021-2020	131	105
2020-2019	55	54
2019-2018	25	17
2018-2017	6	7
Prior	2	2
Total Past Due	550	403
Auto [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	0	1
2020-2019	0
Total Past Due	0	1
Auto [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2020-2019	1	1
Total Past Due	1	1
Non - Auto [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	85	81
2021-2020	42	22
2020-2019	9	8
2019-2018	3	4
2018-2017	1	1
Prior	1	1
Revolving Loans Amort Cost Basis	7	7
Total Past Due	148	124
Non - Auto [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
2022-2021	85	81
2021-2020	41	22
2020-2019	9	8
2019-2018	3	4
2018-2017	1	1
Prior	1	1
Revolving Loans Amort Cost Basis	7	7
Total Past Due	147	$ 124
Non - Auto [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
2021-2020	1
Total Past Due	$ 1

Loans And Allowance For Cred_10

Loans And Allowance For Credit Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 6,442,000	$ 5,389,000
Total Loans		6,441,868	5,388,972
Total 90 Days Past Due Still Accruing		0	8
Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	20,806	14,005
Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,977	665
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,087	915
Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		24,870	15,585
Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,416,998	5,373,387
C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		917,000	837,000
Total Loans		917,317	837,075
Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		221,000	178,000
Total Loans		221,090	177,905
Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		960,000	750,000
Total Loans		959,426	749,793
Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		306,000	217,000
Total Loans		306,322	217,220
Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		732,000	624,000
Total Loans		732,089	623,434
Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		954,000	822,000
Total Loans		954,400	821,653
Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,576,000	1,334,000
Total Loans		1,575,758	1,334,419
Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		551,000	405,000
Total Loans		550,635	405,416
Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		148,000	124,000
Total Loans		147,884	123,968
Commercial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,138,407	1,014,980
Total 90 Days Past Due Still Accruing			5
Commercial [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	4,000
Total Loans	[1]		3,701
Commercial [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,080	34
Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,646	222
Commercial [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,726	3,957
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,131,681	1,011,023
Commercial [Member] | C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans	[2]	917,317	837,075
Total 90 Days Past Due Still Accruing			5
Commercial [Member] | C&I [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	3,924	3,638
Commercial [Member] | C&I [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		297	34
Commercial [Member] | C&I [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,646	222
Commercial [Member] | C&I [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		5,867	3,894
Commercial [Member] | C&I [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		911,450	833,181
Commercial [Member] | Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		221,090	177,905
Commercial [Member] | Muncipal [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	76	63
Commercial [Member] | Muncipal [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		783
Commercial [Member] | Muncipal [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		859	63
Commercial [Member] | Muncipal [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		220,231	177,842
Agricultural [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		77,000	98,000
Total Loans		76,947	98,089
Agricultural [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	243	181
Agricultural [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		243	181
Agricultural [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		76,704	97,908
Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		4,527,995	3,746,519
Real Estate [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	15,734	9,585
Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		867	581
Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		441	690
Real Estate [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		17,042	10,856
Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,510,953	3,735,663
Real Estate [Member] | Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		959,426	749,793
Real Estate [Member] | Construction & Development [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	3,751	2,953
Real Estate [Member] | Construction & Development [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			39
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		175
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			2,992
Total Loans		3,926
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		955,500	746,801
Real Estate [Member] | Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		306,322	217,220
Real Estate [Member] | Farm [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	668	600
Real Estate [Member] | Farm [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			215
Real Estate [Member] | Farm [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		668	815
Real Estate [Member] | Farm [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		305,654	216,405
Real Estate [Member] | Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		732,089	623,434
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	1,444	235
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		160
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,604	235
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		730,485	623,199
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		954,400	821,653
Real Estate [Member] | Owner Occupied CRE [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]		813
Total Loans	[1]	1,151
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			280
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,151	1,093
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		953,249	820,560
Real Estate [Member] | Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,575,758	1,334,419
Real Estate [Member] | Residential [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	8,720	4,984
Real Estate [Member] | Residential [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		707	327
Real Estate [Member] | Residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		266	410
Real Estate [Member] | Residential [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		9,693	5,721
Real Estate [Member] | Residential [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,566,065	1,328,698
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		698,519	529,384
Total 90 Days Past Due Still Accruing			3
Consumer [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	829	538
Consumer [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		30	50
Consumer [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			3
Consumer [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		859	591
Consumer [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		697,660	528,793
Consumer [Member] | Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		550,635	405,416
Consumer [Member] | Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	779	393
Consumer [Member] | Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		30	26
Consumer [Member] | Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		809	419
Consumer [Member] | Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		549,826	404,997
Consumer [Member] | Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		147,884	123,968
Total 90 Days Past Due Still Accruing			3
Consumer [Member] | Non - Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	50	145
Consumer [Member] | Non - Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			24
Consumer [Member] | Non - Auto [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			3
Consumer [Member] | Non - Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		50	172
Consumer [Member] | Non - Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 147,834	$ 123,796
[1] The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due. All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet.

Loans And Allowance For Cred_11

Loans And Allowance For Credit Losses - Schedule of Loans Modified and Considered Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) Securityloan	Dec. 31, 2021 USD ($) Restructuredloan
Financing Receivable Modifications [Line Items]
Number	3	20
Pre- Modification Recorded Investments	$ 2,123	$ 6,175
Post- Modification Recorded Investment	$ 2,123	$ 6,175
Commercial [Member]
Financing Receivable Modifications [Line Items]
Number	1	4
Pre- Modification Recorded Investments	$ 206	$ 361
Post- Modification Recorded Investment	$ 206	$ 361
Agricultural [Member]
Financing Receivable Modifications [Line Items]
Number | Restructuredloan		4
Pre- Modification Recorded Investments		$ 3,988
Post- Modification Recorded Investment		$ 3,988
Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number	2	9
Pre- Modification Recorded Investments	$ 1,917	$ 1,766
Post- Modification Recorded Investment	$ 1,917	$ 1,766
Consumer [Member]
Financing Receivable Modifications [Line Items]
Number | Restructuredloan		3
Pre- Modification Recorded Investments		$ 60
Post- Modification Recorded Investment		$ 60
C&I [Member] | Commercial [Member]
Financing Receivable Modifications [Line Items]
Number	1	4
Pre- Modification Recorded Investments	$ 206	$ 361
Post- Modification Recorded Investment	$ 206	$ 361
Construction & Development [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number | Restructuredloan		1
Pre- Modification Recorded Investments		$ 200
Post- Modification Recorded Investment		$ 200
Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number	1	3
Pre- Modification Recorded Investments	$ 1,788	$ 1,047
Post- Modification Recorded Investment	$ 1,788	$ 1,047
Residential [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Number	1	5
Pre- Modification Recorded Investments	$ 129	$ 519
Post- Modification Recorded Investment	$ 129	$ 519
Auto [Member] | Consumer [Member]
Financing Receivable Modifications [Line Items]
Number | Restructuredloan		2
Pre- Modification Recorded Investments		$ 51
Post- Modification Recorded Investment		$ 51
Non - Auto [Member] | Consumer [Member]
Financing Receivable Modifications [Line Items]
Number | Restructuredloan		1
Pre- Modification Recorded Investments		$ 9
Post- Modification Recorded Investment		$ 9

Loans And Allowance For Cred_12

Loans And Allowance For Credit Losses - Schedule of How Loans Were Modified as Troubled Debt Restructured Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	$ 2,123	$ 6,175
Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		742
Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	2,123	5,433
Commercial [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	206	361
Commercial [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		212
Commercial [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	206	149
Agricultural [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		3,988
Agricultural [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		68
Agricultural [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		3,920
Real Estate [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	1,917	1,766
Real Estate [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		462
Real Estate [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	1,917	1,304
Consumer [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		60
Consumer [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		60
C&I [Member] | Commercial [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	206	361
C&I [Member] | Commercial [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		212
C&I [Member] | Commercial [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	206	149
Construction & Development [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		200
Construction & Development [Member] | Real Estate [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		200
Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	1,788	1,047
Owner Occupied CRE [Member] | Real Estate [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	1,788	1,047
Residential [Member] | Real Estate [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	129	519
Residential [Member] | Real Estate [Member] | Extended Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		262
Residential [Member] | Real Estate [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments	$ 129	257
Auto [Member] | Consumer [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		51
Auto [Member] | Consumer [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		51
Non - Auto [Member] | Consumer [Member]
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		9
Non - Auto [Member] | Consumer [Member] | Combined Rate And Maturity
Financing Receivable Modifications [Line Items]
Pre- Modification Recorded Investments		$ 9

Loans And Allowance For Cred_13

Loans And Allowance For Credit Losses - Analysis of Changes in Loans to Officers, Directors, Principal Shareholders, or Associates of Such Persons (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Receivables [Abstract]
Beginning Balance	$ 137,527
Additional Loans	233,232
Payments	262,992
Ending Balance	$ 107,767

Loans Held for Sale - Additiona

Loans Held for Sale - Additional Information (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Loans Receivables Held For Sale Net [Abstract]
Loans held-for-sale	$ 11,965,000	$ 37,810,000
Loans held-for-sale at the lower of cost or fair value	$ 1,468,000	$ 3,688,000

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
IRLCs [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	$ 41,664	$ 85,973
Asset Derivative Fair Value	400	1,279
Liability Derivative Fair Value	0	0
Forward Mortgage-Backed Securities Trades [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	45,000	116,000
Asset Derivative Fair Value	85	0
Liability Derivative Fair Value	$ 0	$ 147

Bank Premises and Equipment - S

Bank Premises and Equipment - Summary of Bank Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Gross	$ 268,738	$ 257,762
Less: accumulated depreciation and amortization	(115,765)	(107,998)
Total Bank Premises and Equipment	152,973	149,764
Land [Member]
Property Plant And Equipment [Line Items]
Land	38,703	38,380
Buildings [Member]
Property Plant And Equipment [Line Items]
Buildings	$ 164,371	156,350
Buildings [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	20 years
Buildings [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	40 years
Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Furniture and equipment	$ 62,715	60,083
Furniture and Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	3 years
Furniture and Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	10 years
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Leasehold improvements	$ 2,949	$ 2,949
Leasehold Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Useful Life in years	15 years

Bank Premises and Equipment - A

Bank Premises and Equipment - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 10,818,000	$ 10,504,000	$ 9,865,000
Rental income for leases included in net occupancy expense	$ 2,665,000	$ 2,622,000	$ 2,789,000

Deposits and Borrowings - Addit

Deposits and Borrowings - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Time deposit threshold amount	$ 250,000
Time deposits of $250,000 or more totaled	194,536,000	$ 151,344,000
Deposits received from related parties	198,096,000	229,791,000
Other borrowings	$ 21,053,000	$ 21,053,000
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	3.89%	0.06%

Deposits and Borrowings - Sched

Deposits and Borrowings - Scheduled Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Deposits [Abstract]
2023	$ 460,755
2024	30,742
2025	15,169
2026	9,226
2027	8,774
Thereafter	0
Time Deposits	$ 524,666

Deposits and Borrowings - Sch_2

Deposits and Borrowings - Schedule of Borrowings (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Securities sold under agreements with customers to repurchase.	$ 618,829,000	$ 625,499,000
Federal funds purchased	2,625,000	24,600,000
Other borrowings	21,053,000	21,053,000
Total	$ 642,507,000	$ 671,152,000

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Line Of Credit Facility [Line Items]
Revolving line of credit, permitted	$ 25,000,000
Line of credit, maturity date	Jun. 30, 2023
Term facility payable (in years)	five
Percentage of restricted dividend payments	55%
Line of credit	$ 0	$ 0
Minimum [Member]
Line Of Credit Facility [Line Items]
Percentage of stock dividend declared		36%
Maximum [Member]
Line Of Credit Facility [Line Items]
Percentage of stock dividend declared			53%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Federal statutory tax rate	21%	21%	21%
Deferred tax amounts, valuation allowance recorded	$ 0	$ 0
Uncertain tax positions	0	0
Initial capital contribution commitment	5,500,000
Initial contribution included in other assets	$ 131,000	55,000
NMTC investments [Member]
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act, Measurement Period Adjustment, Increase (Decrease) in Effective Tax Rate	39%
Investments in other assets	$ 26,825,000	$ 29,000,000
FFB Paris Investment Fund, LLC [Member]
Income Tax Contingency [Line Items]
Loan investment	18,000,000
Leveraged loan, invest in other borrowings	$ 21,053,000

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Current federal income tax	$ 50,429	$ 40,527	$ 45,133
Current state income tax	175	350	447
Deferred federal income tax (expense) benefit	(4,205)	3,531	(5,249)
Income tax expense	$ 46,399	$ 44,408	$ 40,331

Income Taxes - Percentage of Pr

Income Taxes - Percentage of Pretax Earnings, Differs from Statutory Federal Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21%	21%	21%
Reductions in tax rate resulting from interest income exempt from federal income tax	(4.40%)	(4.70%)	(4.60%)
Other	(0.10%)	0%	0.20%
Effective income tax rate	16.50%	16.30%	16.60%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Tax basis of loans in excess of financial statement basis	$ 19,474	$ 15,607
Recognized for financial reporting purposes but not yet for tax purposes: Deferred compensation	3,303	2,933
Net unrealized loss on investment securities available-for-sale	142,276	0
Other deferred tax assets	1,038	831
Total deferred tax assets	166,091	19,371
Deferred tax liabilities:
Financial statement basis of fixed assets in excess of tax basis	6,019	6,178
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes	13,866	13,594
Recognized for financial reporting purposes but not yet for tax purposes - accretion on investment securities	644	499
Net unrealized gain on investment securities available-for- sale	0	26,384
Other deferred tax liabilities	51	69
Total deferred tax liabilities	20,580	46,724
Net deferred tax asset (liability)	$ (145,511)	$ (27,353)

Fair Value Disclosures - Additi

Fair Value Disclosures - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) Loans	Dec. 31, 2021 USD ($) Loans	Dec. 31, 2020 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets transfer between Level 2 and Level 3	$ 0	$ 0	$ 0
Other real estate owned, total	$ 0	$ 0
Minimum [Member] | Measurement Input, Discount Rate [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt discounts, percentage	5
Maximum [Member] | Measurement Input, Discount Rate [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt discounts, percentage	25
Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Number of loans held-for-sale | Loans | Loans	0	0
Recognized credit losses	$ 0	$ 0	$ 0

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	$ 5,474,359,000	$ 6,573,179,000
Loans held-for-sale	(11,965,000)	(37,810,000)
Obligations of State and Political Subdivisions [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	1,898,611,000	2,753,471,000
Residential Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	2,616,566,000	3,259,449,000
Commercial Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	374,869,000	365,120,000
IRLCs [Member]
Activity in available-for-sale securities and other investments:
Asset Derivative Fair Value	400,000	1,279,000
Liability Derivative Fair Value	0	0
Forward Mortgage-Backed Securities Trades [Member]
Activity in available-for-sale securities and other investments:
Asset Derivative Fair Value	85,000	0
Liability Derivative Fair Value	0	147,000
U.S. Treasury securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	482,549,000	126,841,000
Fair Value, Measurements, Recurring [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	5,474,359,000	6,573,179,000
Loans held-for-sale	(10,497,000)	(34,122,000)
Fair Value, Measurements, Recurring [Member] | Obligations of State and Political Subdivisions [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	1,898,611,000	2,753,471,000
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	2,616,566,000	3,259,449,000
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	374,869,000	365,120,000
Fair Value, Measurements, Recurring [Member] | IRLCs [Member]
Activity in available-for-sale securities and other investments:
Asset Derivative Fair Value	400,000	1,279,000
Fair Value, Measurements, Recurring [Member] | Forward Mortgage-Backed Securities Trades [Member]
Activity in available-for-sale securities and other investments:
Loans held-for-sale	(85,000)
Liability Derivative Fair Value		(147,000)
Fair Value, Measurements, Recurring [Member] | U.S. Treasury securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	482,549,000	126,841,000
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	97,850,000	63,868,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	486,463,000	131,271,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | U.S. Treasury securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	482,549,000	126,841,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	4,987,896,000	6,441,908,000
Loans held-for-sale	(10,497,000)	(34,122,000)
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	1,898,611,000	2,753,471,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	2,616,566,000	3,259,449,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	374,869,000	365,120,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Activity in available-for-sale securities and other investments:
Asset Derivative Fair Value	400,000	1,279,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Activity in available-for-sale securities and other investments:
Loans held-for-sale	(85,000)
Liability Derivative Fair Value		(147,000)
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Corporate Bonds [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	97,850,000	63,868,000
Other Securities [Member] | Fair Value, Measurements, Recurring [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	3,914,000	4,430,000
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Activity in available-for-sale securities and other investments:
Securities available-for-sale, at fair value	$ 3,914,000	$ 4,430,000

Fair Value Disclosures - Summar

Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fairvaluemeasurementsloansheldforsale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 10,226	$ 33,200
Net unrealized gains on loans held-for-sale	271	922
Loans held-for-sale at fair value	$ 10,497	$ 34,122

Fair Value Disclosures - Schedu

Fair Value Disclosures - Schedule of Gain Loss on Sale of Mortgage Loans (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Scheduleofgainlossonsaleofmortgageloans [Abstract]
Realized gain on sale and fees on mortgage loans*	[1]	$ 20,357	$ 37,091	$ 39,378
Change in fair value on loans held-for-sale and IRLCs		1,554	(5,259)	5,900
Change in forward mortgage-backed securities trades		232	1,413	(1,406)
Total gain on sale of mortgage loans		$ 19,035	$ 33,245	$ 43,872
[1] * This includes gain on loans held-for-sale carried under the fair value method and lower of cost or market.

Fair Value Disclosures - Sche_2

Fair Value Disclosures - Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
CASH AND DUE FROM BANKS	$ 293,286,000	$ 205,053,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	37,392,000	323,535,000
Securities available-for-sale, at fair value	5,474,359,000	6,573,179,000
Loans held-for-investment, net of allowance for credit losses	6,366,034,000	5,325,507,000
Loans held-for-sale	11,965,000	37,810,000
Deposits with stated maturities	524,666,000
BORROWINGS	642,507,000	671,152,000
IRLCs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Asset Derivative Fair Value	400,000	1,279,000
Liability Derivative Fair Value	0	0
Forward Mortgage-Backed Securities Trades [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Asset Derivative Fair Value	85,000	0
Liability Derivative Fair Value	0	147,000
Level 1 Inputs [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
CASH AND DUE FROM BANKS	293,286,000	205,053,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	37,392,000	323,535,000
Deposits with no stated maturities	10,480,841,000	10,105,073,000
Level 1 Inputs [Member] | Estimated Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
CASH AND DUE FROM BANKS	293,286,000	205,053,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	37,392,000	323,535,000
Deposits with no stated maturities	10,480,841,000	10,105,073,000
Levels 1 and 2 Inputs [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	5,474,359,000	6,573,179,000
Levels 1 and 2 Inputs [Member] | Estimated Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available-for-sale, at fair value	5,474,359,000	6,573,179,000
Level 3 Inputs [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans held-for-investment, net of allowance for credit losses	6,366,034,000	5,325,507,000
Level 3 Inputs [Member] | Estimated Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans held-for-investment, net of allowance for credit losses	6,372,859,000	5,335,791,000
Level 2 Inputs [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans held-for-sale	11,965,000	37,810,000
Accrued interest receivable	58,162,000	57,169,000
Deposits with stated maturities	524,666,000	461,415,000
BORROWINGS	642,507,000	671,152,000
Accrued interest payable	1,121,000	221,000
Level 2 Inputs [Member] | Carrying Value [Member] | IRLCs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Asset Derivative Fair Value	400,000	1,279,000
Level 2 Inputs [Member] | Carrying Value [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Liability Derivative Fair Value	85,000	(147,000)
Level 2 Inputs [Member] | Estimated Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans held-for-sale	11,965,000	37,844,000
Accrued interest receivable	58,162,000	57,169,000
Deposits with stated maturities	518,811,000	462,312,000
BORROWINGS	642,507,000	671,152,000
Accrued interest payable	1,121,000	221,000
Level 2 Inputs [Member] | Estimated Fair Value [Member] | IRLCs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Asset Derivative Fair Value	400,000	1,279,000
Level 2 Inputs [Member] | Estimated Fair Value [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Liability Derivative Fair Value	$ 85,000	$ (147,000)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Dec. 31, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease commitments, 2023	$ 1,066,000
Future minimum lease commitments, 2024	664,000
Future minimum lease commitments, 2025	431,000
Future minimum lease commitments, 2026	89,000
Future minimum lease commitments, 2027	60,000
Future minimum lease commitments, thereafter	$ 20,000

Financial Instruments with Of_3

Financial Instruments with Off-Balance-Sheet Risk - Additional Information (Detail)	Dec. 31, 2022 USD ($)
Risks and Uncertainties [Abstract]
Unfunded loan commitments	$ 12,323,000

Financial Instruments with Of_4

Financial Instruments with Off-Balance-Sheet Risk - Schedule of Financial Instruments with Off-Balance-sheet Risk (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 2,063,271
Unfunded Lines of Credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	1,103,286
Commitments to Extend Credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	916,287
Standby Letters of Credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 43,698

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Vesting period	6 years
Employee deferrals	4%
Employee compensation	5%
Defined contribution plan cost	$ 4,233,000	$ 10,134,000	$ 10,740,000
Common Stock, Shares, Issued	142,657,871	142,532,116
Common stock	$ 1,427,000	$ 1,425,000
Directors' fees	100%
Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Other Assets Value	$ 33,241,000	32,404,000
Cash value included in Other Assets	$ 836,000	$ 814,000	822,000
Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan shares held in Trust for Employees	929,210	936,897
Make Whole Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0	0
Make Whole Plan [Member] | Executive [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan shares held in Trust for Employees	114,177	116,085
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Available for Sale Securities And Other Assets	$ 2,172,000	$ 1,211,000
Supplemental Executive Retirement Plan [Member] | Certain Executive Officers [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 445,000	$ 1,163,000	719,000
Profit Sharing Plan's Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Common Stock, Shares, Issued	2,148,460	2,183,760
Common stock	$ 73,907,000	$ 111,022,000
Safe Harbor 401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan cost	$ 3,675,000	$ 3,590,000	$ 3,374,000

Dividends from Subsidiaries - A

Dividends from Subsidiaries - Additional Information (Detail)	Dec. 31, 2022 USD ($)
Equity [Abstract]
Amount available for the declaration of dividends by subsidiary banks without prior approval of regulatory agencies	$ 437,156,000

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Periodic increase of capital conservation buffer	0.625%
Total risk-based capital ratio, Actual Ratio	0.1929	0.2034
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio	0.1822	0.1935
Common Tier1 Capital (to Risk-Weighted Assets), Actual Ratio	0.1822	0.1935
Tier1 Leverage ratio, Actual Ratio	0.1096	0.1113
Required tangible net assets	$ 2,000,000
Tangible net assets, total	47,766,000
Subsidiary bank's reserve balance	$ 0	$ 0
Minimum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer	0.625%
Maximum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer	2.50%

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Regulatory Capital Ratios Under the Basel III Regulatory Capital Framework (Detail) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Actual Ratio	0.1929	0.2034
Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1822	0.1935
Common Equity Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1822	0.1935
Leverage Ratio, Actual Ratio	0.1096	0.1113
Consolidated [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Actual Amount	$ 1,586,888	$ 1,425,907
Tier1 Capital to Risk-Weighted Assets, Actual Amount	1,498,731	1,356,006
Common Equity Tier1 Capital to Risk-Weighted Assets, Actual Amount	1,498,731	1,356,006
Leverage Ratio, Actual Amount	$ 1,498,731	$ 1,356,006
Total Capital to Risk-Weighted Assets, Actual Ratio	0.1929	0.2034
Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1822	0.1935
Common Equity Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1822	0.1935
Leverage Ratio, Actual Ratio	0.1096	0.1113
Consolidated [Member] | Minimum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized, Amount	$ 822,497	$ 700,955
Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized, Amount	$ 493,498	$ 420,573
Total Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized , Ratio	0.1000	0.1000
Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized , Ratio	0.0600	0.0600
Consolidated [Member] | Minimum [Member] | Basel III Fully Phased-In [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Minimum Capital Required	$ 863,622	$ 736,003
Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	699,122	595,812
Common Equity Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	575,748	490,669
Leverage Ratio, Minimum Capital Required	$ 546,983	$ 487,459
Total Capital to Risk-Weighted Assets, Minimum Capital Required	0.1050	0.1050
Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	0.0850	0.0850
Common Equity Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required, Ratio	0.0700	0.0700
Leverage Ratio, Minimum Capital Required, Ratio	0.0400	0.0400
Parent Company [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Actual Amount	$ 1,442,902	$ 1,258,965
Tier1 Capital to Risk-Weighted Assets, Actual Amount	1,354,745	1,189,064
Common Equity Tier1 Capital to Risk-Weighted Assets, Actual Amount	1,354,745	1,189,064
Leverage Ratio, Actual Amount	$ 1,354,745	$ 1,189,064
Total Capital to Risk-Weighted Assets, Actual Ratio	0.1758	0.1799
Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1650	0.1700
Common Equity Tier1 Capital to Risk-Weighted Assets, Actual Ratio	0.1650	0.1700
Leverage Ratio, Actual Ratio	0.0995	0.0979
Parent Company [Member] | Minimum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized, Amount	$ 820,819	$ 699,623
Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized, Amount	656,655	559,698
Common Equity Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized, Amount	533,532	454,755
Leverage Ratio, Required To Be Considered Well Capitalized, Amount	$ 681,107	$ 607,407
Total Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized , Ratio	0.1000	0.1000
Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized , Ratio	0.0800	0.0800
Common Equity Tier1 Capital to Risk-Weighted Assets, Required To Be Considered Well Capitalized , Ratio	0.0650	0.0650
Leverage Ratio, Required To Be Considered Well Capitalized , Ratio	0.0500	0.0500
Parent Company [Member] | Minimum [Member] | Basel III Fully Phased-In [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital to Risk-Weighted Assets, Minimum Capital Required	$ 861,860	$ 734,604
Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	697,696	594,679
Common Equity Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	574,573	489,736
Leverage Ratio, Minimum Capital Required	$ 544,886	$ 485,926
Total Capital to Risk-Weighted Assets, Minimum Capital Required	0.1050	0.1050
Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required	0.0850	0.0850
Common Equity Tier1 Capital to Risk-Weighted Assets, Minimum Capital Required, Ratio	0.0700	0.0700
Leverage Ratio, Minimum Capital Required, Ratio	0.0400	0.0400

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 27, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	6 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit	$ 15.43
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit	$ 48.91
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	Black-Scholes options pricing model
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	2.92%	0.76%	1.83%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	1.44%	1.23%	1.62%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	6 years 7 days	6 years 5 months 1 day	6 years 7 months 20 days
Percentage of Option Vesting Rate	20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate	28.72%	30.11%	26.69%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 13.30	$ 12.99	$ 7.31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 9,131,000	$ 9,486,000	$ 4,052,000
Share-based Payment Arrangement, Expense	1,440,000	1,316,000	1,377,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 5,407,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 11 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 1,750,000	1,648,000	1,293,000
DIVIDENDS PAYABLE	24,278,000	21,388,000
Other Liabilities [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
DIVIDENDS PAYABLE	$ 74,000	52,000
Two Thousand Twenty One Omnibus Stock and Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	1,877,004			2,500,000
Two Thousand Twenty One Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of Option Vesting Rate	20%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Measurement Amount In Assets	$ 50,000,000,000
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance Measurement Amount In Assets	$ 10,000,000,000
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	2 years
Percentage of Option Vesting Rate	20%
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 3,422,000	$ 3,004,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 1 month 17 days	1 year 5 months 1 day
Restricted Stock Units [Member] | Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 1,887,000	$ 1,329,000	1,301,000
Restricted Stock Units [Member] | Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	631,000	600,000	635,000
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 1,861,000	$ 2,947,000	$ 1,924,000
Performance Shares [Member] | Executives And Other Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement , Award Requisite Service Period	3 years
Vesting period	3 years
Share Based Compensation, Number of Shares Average Adjusted Earnings Per Share Growth Percentage	50%
Performance Shares [Member] | Maximum [Member] | Executives And Other Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation, Number Of Shares Issued Upon Vesting Based On Core Return Percentage	200%
Performance Shares [Member] | Minimum [Member] | Executives And Other Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation, Number Of Shares Issued Upon Vesting Based On Core Return Percentage	0%

Stock Based Compensation - Sche

Stock Based Compensation - Schedule of Changes in Restricted Stock Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance at beginning of period	46,598	95,888	105,309
Grants	15,425	12,110	56,480
Vesting	(37,010)	(60,011)	(65,662)
Forfeited/expired	(200)	(1,389)	(239)
Balance at end of period	24,813	46,598	95,888
Balance at beginning of period	$ 35.75	$ 29.89	$ 29.93
Grants	40.89	49.58	29.22
Vesting	37.61	29.25	29.39
Forfeited/expired	29.70	32.76	29.70
Balance at end of period	$ 36.21	$ 35.75	$ 29.89
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance at beginning of period	22,597	0
Grants	24,833	22,597
Vesting	(7,425)	0
Forfeited/expired	(348)	0
Balance at end of period	39,657	22,597	0
Balance at beginning of period	$ 48.91	$ 0
Grants	47.19	48.91
Vesting	48.91	0
Forfeited/expired	48.91	0
Balance at end of period	$ 47.83	$ 48.91	$ 0
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance at beginning of period	22,597
Grants	24,833	22,597
Vesting	0
Forfeited/expired	(348)
Balance at end of period	47,082	22,597
Balance at beginning of period	$ 48.91
Grants	47.19	$ 48.91
Vesting	0
Forfeited/expired	48.91
Balance at end of period	$ 48	$ 48.91

Stock Based Compensation - Summ

Stock Based Compensation - Summary of Vested and Unvested Restricted Stock Outstanding (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Balance at beginning of period	46,598	95,888	105,309
Grants	15,425	12,110	56,480
Vesting	(37,010)	(60,011)	(65,662)
Forfeited/expired	(200)	(1,389)	(239)
Balance at end of period	24,813	46,598	95,888
Balance at beginning of period	$ 35.75	$ 29.89	$ 29.93
Grants	40.89	49.58	29.22
Vesting	37.61	29.25	29.39
Forfeited/expired	29.70	32.76	29.70
Balance at end of period	$ 36.21	$ 35.75	$ 29.89

Stock Based Compensation - Sc_2

Stock Based Compensation - Schedule of Analysis of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding, beginning of year | shares	1,669,976
Granted | shares	240,583
Exercised | shares	(355,692)
Cancelled | shares	(64,454)
Outstanding, end of year | shares	1,490,413
Exercisable at end of year | shares	770,401
Outstanding, beginning of year | $ / shares	$ 25.11
Granted | $ / shares	47.19
Exercised | $ / shares	18.42
Cancelled | $ / shares	31.56
Outstanding, end of year | $ / shares	29.99
Exercisable at end of year | $ / shares	$ 22.12
Outstanding, end of year	5 years 10 months 9 days
Exercisable at end of year	4 years 1 month 28 days
Outstanding, end of year | $	$ 12,519
Exercisable at end of year | $	$ 10,057

Stock Based Compensation - Sc_3

Stock Based Compensation - Schedule of Information Concerning Outstanding and Vested Stock Options (Detail)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Exercise Price $15.43 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 15.43
Number Outstanding	68,785
Remaining Contracted Life (Years)	9 months 18 days
Number Vested	68,785
Exercise Price $16.95 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 16.95
Number Outstanding	226,781
Remaining Contracted Life (Years)	2 years 9 months 18 days
Number Vested	226,781
Exercise Price $21.18 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 21.18
Number Outstanding	440,060
Remaining Contracted Life (Years)	4 years 4 months 24 days
Number Vested	324,440
Exercise Price $29.70 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 29.70
Number Outstanding	306,125
Remaining Contracted Life (Years)	6 years 6 months
Number Vested	107,495
Exercise Price $34.55 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 34.55
Number Outstanding	10,950
Remaining Contracted Life (Years)	7 years 1 month 6 days
Number Vested	1,950
Exercise Price $48.91 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 48.91
Number Outstanding	199,979
Remaining Contracted Life (Years)	8 years 7 months 6 days
Number Vested	40,950
Exercise Price $47.19 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price | $ / shares	$ 47.19
Number Outstanding	237,733
Remaining Contracted Life (Years)	9 years 7 months 6 days
Number Vested	0

Condensed Financial Informati_3

Condensed Financial Information - Parent Company - Condensed Balance Sheets (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 27, 2020	Dec. 31, 2019
ASSETS
Interest-bearing deposits in subsidiary bank		$ 37,392,000	$ 323,535,000
Total cash and cash equivalents		330,678,000	528,588,000	$ 729,084,000		$ 282,604,000
Securities available-for-sale, at fair value		5,474,359,000	6,573,179,000
Other assets		322,523,000	170,834,000
Total assets		12,974,066,000	13,102,461,000
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities		11,708,329,000	11,343,237,000
SHAREHOLDERS’ EQUITY:
Common stock		1,427,000	1,425,000
Capital surplus		677,593,000	676,871,000
Retained earnings		1,121,945,000	981,675,000		$ 466,000
Accumulated other comprehensive earnings		(535,228,000)	99,253,000
Total shareholders’ equity		1,265,737,000	1,759,224,000	1,678,190,000		1,227,197,000
Total liabilities and shareholders’ equity		12,974,066,000	13,102,461,000
Subsidiary Bank [Member]
ASSETS
Cash in banks	[1]	50,204,000	83,547,000
Interest-bearing deposits in subsidiary bank	[1]	69,053,000	68,814,000
Unaffiliated Banks [Member]
ASSETS
Cash in banks	[1]	2,000	2,000
Parent Company [Member]
ASSETS
Total cash and cash equivalents		119,259,000	152,363,000	$ 136,666,000		$ 125,076,000
Securities available-for-sale, at fair value		2,235,000	2,489,000
Investment in and advances to subsidiaries, at equity	[1]	1,171,095,000	1,629,387,000
Intangible assets		723,000	723,000
Other assets		5,355,000	3,610,000
Total assets		1,298,667,000	1,788,572,000
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities		32,930,000	29,348,000
SHAREHOLDERS’ EQUITY:
Common stock		1,427,000	1,425,000
Capital surplus		677,593,000	676,871,000
Retained earnings		1,121,945,000	981,675,000
Treasury stock		(11,035,000)	(10,090,000)
Deferred compensation		11,035,000	10,090,000
Accumulated other comprehensive earnings		(535,228,000)	99,253,000
Total shareholders’ equity		1,265,737,000	1,759,224,000
Total liabilities and shareholders’ equity		$ 1,298,667,000	$ 1,788,572,000
[1] Eliminates in consolidation.

Condensed Financial Informati_4

Condensed Financial Information - Parent Company - Condensed Statements of Earnings (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income:
Total interest income		$ 432,854	$ 376,405	$ 364,128
Expenses:
Salaries, commissions and employee benefits		134,133	142,042	135,123
EARNINGS BEFORE INCOME TAXES		280,874	271,970	242,365
Income tax benefit		(46,399)	(44,408)	(40,331)
NET EARNINGS		234,475	227,562	202,034
Parent Company [Member]
Income:
Cash dividends from subsidiaries	[1]	67,500	96,500	87,500
Excess of earnings over dividends of subsidiaries	[1]	174,741	140,441	122,997
Other		62	279	8,368
Total interest income		242,303	237,220	218,865
Expenses:
Salaries, commissions and employee benefits		6,541	7,374	13,795
Other operating expenses		4,106	5,262	5,599
Total expense		10,647	12,636	19,394
EARNINGS BEFORE INCOME TAXES		231,656	224,584	199,471
Income tax benefit		(2,819)	2,978	2,563
NET EARNINGS		$ 234,475	$ 227,562	$ 202,034
[1] Eliminates in consolidation

Condensed Financial Informati_5

Condensed Financial Information - Parent Company - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net earnings		$ 234,475	$ 227,562	$ 202,034
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		12,762	13,061	12,793
Gain on sale of assets, net		(4,115)	(1,217)	(4,001)
Decrease (increase) in other assets		907	(11,308)	(23,233)
Increase (decrease) in other liabilities		(27,801)	12,697	24,122
Cash flows from investing activities:
Maturity of available-for-sale securities		4,132,928	8,495,614	6,075,017
Purchases of bank premises and equipment and software		(15,784)	(19,205)	(16,450)
Cash flows from financing activities:
Cash dividends paid		(91,315)	(79,712)	(70,318)
Repurchase of stock		(9,449)	0	(8,008)
Net increase in cash and cash equivalents		(197,910)	(200,496)	446,480
CASH AND CASH EQUIVALENTS, beginning of year		528,588	729,084	282,604
CASH AND CASH EQUIVALENTS, end of year		330,678	528,588	729,084
Parent Company [Member]
Cash flows from operating activities:
Net earnings		234,475	227,562	202,034
Adjustments to reconcile net earnings to net cash provided by operating activities:
Excess of earnings over dividends of subsidiaries (1)	[1]	(174,741)	(140,441)	(122,997)
Depreciation and amortization		188	189	198
Gain on sale of assets, net			0	(38)
Decrease (increase) in other assets		645	(693)	164
Increase (decrease) in other liabilities		933	2,997	2,083
Other			(4)	35
Net cash provided by operating activities		61,500	89,610	81,479
Cash flows from investing activities:
Maturity of available-for-sale securities			0	3,720
Purchases of bank premises and equipment and software		(385)	(106)
Net cash provided by (used in) investing activities		(385)	(106)	3,720
Cash flows from financing activities:
Proceeds from stock option exercises		6,545	5,905	4,717
Cash dividends paid		(91,315)	(79,712)	(70,318)
Repurchase of stock		(9,449)	0	(8,008)
Net cash used in financing activities		(94,219)	(73,807)	(73,609)
Net increase in cash and cash equivalents		(33,104)	15,697	11,590
CASH AND CASH EQUIVALENTS, beginning of year		152,363	136,666	125,076
CASH AND CASH EQUIVALENTS, end of year		$ 119,259	$ 152,363	$ 136,666
[1] Eliminates in consolidation

Cash Flow Information - Supplem

Cash Flow Information - Supplemental Information on Cash Flows and Noncash Transactions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplemental cash flow information:
Interest paid	$ 30,540	$ 6,198	$ 14,494
Federal income taxes paid	45,430	39,528	44,381
Schedule of noncash investing and financing activities:
Investment securities purchased but not settled	0	0	14,641
Restricted stock granted to officers and directors	$ 2,188	$ 1,316	$ 672

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2022
Commercial Bancshares, Inc [Member]
Business Acquisition [Line Items]
Business acquisition, agreement date		Sep. 19, 2019
Payment for all outstanding shares of acquired entity by shares	6,275,574
Business acquisition, special dividend	$ 1,920,000
TB&T Bancshares, Inc. and The Bank & Trust of Bryan College Station, Texas [Member]
Business Acquisition [Line Items]
Payment for all outstanding shares of acquired entity by shares	6,275,574
Loans	$ 447,702,000
Total loans of contractual amounts	$ 455,181,000

Acquisitions - Schedule of Amou

Acquisitions - Schedule of Amounts Recorded on Consolidated Balance Sheet on Acquisition Date (Detail) $ in Thousands	Jan. 01, 2020 USD ($)
TB&T Bancshares, Inc. and The Bank & Trust of Bryan College Station, Texas [Member]
Business Acquisition [Line Items]
Common stock issued (6,275,574 shares)	$ 220,273

Acquisitions - Schedule of Am_2

Acquisitions - Schedule of Amounts Recorded on Consolidated Balance Sheet on Acquisition Date (Detail) (Parenthentical)	Jan. 01, 2020 shares
TB&T Bancshares, Inc. and The Bank & Trust of Bryan College Station, Texas [Member]
Business Acquisition [Line Items]
Common stock issued	6,275,574

Acquisitions - Schedule of Prel

Acquisitions - Schedule of Preliminary Estimated Fair Value Amounts Assigned to Major Asset and Liability Categories at Acquisition Date (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020
Business Acquisition [Line Items]
Goodwill and intangible assets with indefinite lives	$ 313,481,000	$ 313,481,000
TB&T Bancshares, Inc. and The Bank & Trust of Bryan College Station, Texas [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			$ 61,028,000
Securities available-for-sale			93,967,000
Loans			447,702,000
Identifiable intangible assets			4,798,000
Other assets			25,377,000
Total identifiable assets acquired			632,872,000
Deposits			549,125,000
Other liabilities			5,397,000
Total liabilities assumed			554,522,000
Fair value of net identifiable assets acquired			78,350,000
Goodwill and intangible assets with indefinite lives			$ 141,923,000