First Financial Bankshares (FFIN) 10-Q 3 May 23 2023 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2023	May 03, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Document Period End Date	Mar. 31, 2023
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
Securities Act 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
Trading Symbol	FFIN
Security Exchange Name	NASDAQ
Entity Address, Postal Zip Code	79601
Entity Common Stock, Shares Outstanding		142,731,196

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
ASSETS
CASH AND DUE FROM BANKS	$ 224,875,000	$ 293,286,000	$ 203,187,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	221,336,000	37,392,000	394,566,000
Total cash and cash equivalents	446,211,000	330,678,000	597,753,000
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of these securities was $5,879,040, $6,767,967and $6,152,348 as ofMarch 31, 2023 and 2022, and December 31, 2022, respectively)	5,298,557,000	5,474,359,000	6,502,495,000
LOANS:
Held-for-investment, excluding PPP loans	6,576,060,000	6,441,699,000	5,550,430,000
PPP loans	155,000	169,000	15,739,000
Total loans held-for-investment	6,576,215,000	6,441,868,000	5,566,169,000
Less: Allowance for credit losses	(80,818,000)	(75,834,000)	(66,913,000)
Net loans held for investment	6,495,397,000	6,366,034,000	5,499,256,000
Held-for-sale ($11,766, $22,382 and $10,497at fair value at March 31, 2023 and 2022, and December 31, 2022, respectively)	11,996,000	11,965,000	27,670,000
BANK PREMISES AND EQUIPMENT, net	153,718,000	152,973,000	150,168,000
INTANGIBLE ASSETS, net	315,306,000	315,534,000	316,459,000
OTHER ASSETS	286,801,000	322,523,000	220,399,000
Total assets	13,007,986,000	12,974,066,000	13,314,200,000
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	3,890,991,000	4,061,788,000	3,978,724,000
INTEREST-BEARING DEPOSITS	7,045,427,000	6,943,719,000	7,021,101,000
Total deposits	10,936,418,000	11,005,507,000	10,999,825,000
DIVIDENDS PAYABLE	24,274,000	24,278,000	21,411,000
BORROWINGS	632,927,000	642,507,000	758,595,000
OTHER LIABILITIES	41,514,000	36,037,000	45,620,000
Total liabilities	11,635,133,000	11,708,329,000	11,825,451,000
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
COMMON STOCK - ($0.01 par value, authorized 200,000,000 shares; 142703,531 and 142,704,495,142,532,116 shares issued at , March 31, 2023 and 2022, and December 31, 2022, respectiveley	1,427,000	1,427,000	1,427,000
CAPITAL SURPLUS	679,429,000	677,593,000	680,665,000
RETAINED EARNINGS	1,150,246,000	1,121,945,000	1,016,239,000
TREASURY STOCK (shares at cost: 927,789, 937,847 and 929,210 at March 31, 2023 and 2022, and December 31, 2022, respectively)	(11,271,000)	(11,035,000)	(10,404,000)
DEFERRED COMPENSATION	11,271,000	11,035,000	10,404,000
ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSS), net	(458,249,000)	(535,228,000)	(209,582,000)
Total shareholders' equity	1,372,853,000	1,265,737,000	1,488,749,000
Total liabilities and shareholders' equity	$ 13,007,986,000	$ 12,974,066,000	$ 13,314,200,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Statement of Financial Position [Abstract]
Securities, Available-for-sale, Amortized Cost	$ 5,879,040	$ 6,152,348	$ 6,767,967
Loans held-for-sale, fair value	$ 11,766	$ 10,497	$ 22,382
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Common stock, shares issued	142,703,531	142,657,871	142,704,495
Treasury stock, shares	927,789	929,210	936,847

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
INTEREST INCOME:
Interest and fees on loans	$ 89,009,000	$ 64,499,000
Interest on investment securities:
Taxable	20,782,000	17,823,000
Exempt from federal income tax	10,067,000	14,593,000
Interest on federal funds sold and interest-bearing demand deposits in banks	1,650,000	94,000
Total interest income	121,508,000	97,009,000
INTEREST EXPENSE:
Interest on deposits	21,812,000	1,370,000
Interest on borrowings	3,410,000	200,000
Total interest expense	25,222,000	1,570,000
Net interest income	96,286,000	95,439,000
PROVISION FOR CREDIT LOSSES	2,781,000	4,782,000
Net interest income after provision for credit losses	93,505,000	90,657,000
NONINTEREST INCOME:
Trust fees	9,845,000	9,817,000
Service charges on deposit accounts	6,036,000	5,706,000
Debit card fees	4,936,000	8,926,000
Credit card fees	609,000	602,000
Gain on sale and fees on mortgage loans	2,974,000	6,333,000
Net gain on sale of available-for-sale securities	12,000	31,000
Net gain on sale of foreclosed assets	34,000	1,084,000
Net gain (loss) on sale of other assets	930,000	(10,000)
Interest on loan recoveries	346,000	283,000
Other	2,285,000	2,109,000
Total noninterest income	28,007,000	34,881,000
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	31,461,000	34,138,000
Net occupancy expense	3,430,000	3,225,000
Equipment expense	2,127,000	2,257,000
FDIC insurance premiums	1,654,000	869,000
Debit card expense	3,199,000	2,964,000
Professional and service fees	2,365,000	2,225,000
Printing, stationery and supplies	710,000	540,000
Operational and other losses	931,000	596,000
Software amortization and expense	2,311,000	2,457,000
Amortization of intangible assets	228,000	320,000
Other	8,840,000	9,634,000
Total noninterest expense	57,256,000	59,225,000
EARNINGS BEFORE INCOME TAXES	64,256,000	66,313,000
INCOME TAX EXPENSE	11,688,000	10,341,000
NET EARNINGS	$ 52,568,000	$ 55,972,000
NET EARNINGS PER SHARE, BASIC	$ 0.37	$ 0.39
NET EARNINGS PER SHARE, DILUTED	0.37	0.39
DIVIDENDS PER SHARE	$ 0.17	$ 0.15

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 52,568	$ 55,972
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes	97,454	(390,899)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income taxes	(12)	(31)
Total other items of comprehensive earnings (loss)	97,442	(390,930)
Income tax benefit (expense) related to:
Change in unrealized gain on investment securities available-for-sale	(20,466)	82,088
Reclassification adjustment for realized gains on investment securities included in net earnings	3	7
Total income tax benefit (expense)	(20,463)	82,095
COMPREHENSIVE EARNINGS (LOSS)	$ 129,547	$ (252,863)

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Deferred Compensation [Member]	Accumulated Other Comprehensive Earnings (Loss) [Member]
Beginning Balance at Dec. 31, 2021	$ 1,759,224	$ 1,425	$ 676,871	$ 981,675	$ (10,090)	$ 10,090	$ 99,253
Beginning Balance, Shares at Dec. 31, 2021		142,532,116
Treasury Stock, Beginning Balance, Shares at Dec. 31, 2021					(936,897)
Net earnings (Unaudited)	55,972			55,972
Stock option exercises (unaudited)	2,921	$ 2	2,919
Stock option exercises, Shares		172,751
Restricted stock grant/forfeiture, net (unaudited)	559		559
Restricted stock grant/forfeiture, net (unaudited), Shares		(372)
Cash dividends declared	(21,408)			(21,408)
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes (unaudited)	(308,835)						(308,835)
Shares purchased in connection with directors' deferred compensation plan, net (unaudited)					$ (314)	314
Shares purchased in connection with directors' deferred compensation plan, net (unaudited), Shares					50
Stock option expense (unaudited)	316		316
Ending Balance at Mar. 31, 2022	$ 1,488,749	$ 1,427	680,665	1,016,239	$ (10,404)	10,404	(209,582)
Ending Balance, Shares at Mar. 31, 2022		142,704,495
Treasury Stock, Ending Balance, Shares at Mar. 31, 2022	(936,847)				(936,847)
Beginning Balance at Dec. 31, 2022	$ 1,265,737	$ 1,427	677,593	1,121,945	$ (11,035)	11,035	(535,228)
Beginning Balance, Shares at Dec. 31, 2022		142,657,871
Treasury Stock, Beginning Balance, Shares at Dec. 31, 2022	(929,210)				(929,210)
Net earnings (Unaudited)	$ 52,568			52,568
Stock option exercises (unaudited)	913		913
Stock option exercises, Shares		47,620
Restricted stock grant/forfeiture, net (unaudited)	479		479
Restricted stock grant/forfeiture, net (unaudited), Shares		(1,960)
Cash dividends declared	(24,267)			(24,267)
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes (unaudited)	76,979						76,979
Shares purchased in connection with directors' deferred compensation plan, net (unaudited)					$ (236)	236
Shares purchased in connection with directors' deferred compensation plan, net (unaudited), Shares					1,421
Stock option expense (unaudited)	$ 444		444
Shares repurchased under stock repurchase authorization (unaudited), Shares	244,559
Ending Balance at Mar. 31, 2023	$ 1,372,853	$ 1,427	$ 679,429	$ 1,150,246	$ (11,271)	$ 11,271	$ (458,249)
Ending Balance, Shares at Mar. 31, 2023		142,703,531
Treasury Stock, Ending Balance, Shares at Mar. 31, 2023	(927,789)				(927,789)

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash dividend per share	$ 0.17	$ 0.15
Retained Earnings [Member]
Cash dividend per share	$ 0.17	$ 0.15

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 52,568,000	$ 55,972,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	3,074,000	3,231,000
PROVISION FOR CREDIT LOSSES	2,781,000	4,782,000
Securities premium amortization, net	13,770,000	19,836,000
Discount accretion on purchased loans	0	(373,000)
Gain on sale of securities and other assets, net	(976,000)	(1,074,000)
Change in loans held-for-sale	48,000	9,367,000
Change in other assets	16,774,000	9,434,000
Change in other liabilities	7,848,000	(14,490,000)
Total adjustments	43,319,000	30,713,000
Net cash provided by operating activities	95,887,000	86,685,000
Activity in available-for-sale securities:
Sales	145,948,000	0
Maturities	116,922,000	211,266,000
Purchases	(3,298,000)	(551,559,000)
Net increase in loans held-for-investment	(133,974,000)	(176,350,000)
Purchases of bank premises and equipment	(6,347,000)	(3,193,000)
Proceeds from sale of bank premises and equipment and other assets	2,423,000	0
Net cash provided by (used in) investing activities	121,674,000	(519,836,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(170,797,000)	198,494,000
Net increase in interest-bearing deposits	101,708,000	234,843,000
Net change in borrowings	(9,581,000)	87,443,000
Common stock transactions:
Proceeds from stock option exercises	913,000	2,921,000
Dividends paid	(24,271,000)	(21,385,000)
Net cash provided by (used in) financing activities	(102,028,000)	502,316,000
NET INCREASE IN CASH AND CASH EQUIVALENTS	115,533,000	69,165,000
CASH AND CASH EQUIVALENTS, beginning of period	330,678,000	528,588,000
CASH AND CASH EQUIVALENTS, end of period	446,211,000	597,753,000
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	22,726,000	1,523,000
Transfer of loans to other real estate	175,000	0
Restricted stock grant (forfeiture)	$ 479,000	$ 559,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 – Summary of Significant Accounting Policies Nature of Operations 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 March 31, 2023 . 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 the Company and its subsidiaries, all of which are wholly-owned. All significant 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. 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 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 March 31, 2023, 244,559 shares were repurchased and retired (all during the months of June and July 2022) at an average price of $ 38.61 . The Company did not repurchase any shares during the first quarter of 2023. Other Recently Issued and Effective Authoritative Accounting Guidance 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 ASU 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 the 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 did not have a significant impact on our financial statements. 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 three-months ended March 31, 2023 and 2022. 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 marketplace 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. At March 31, 2023 and 2022, and December 31, 2022 , 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 March 31, 2023 and 2022, and December 31, 2022 , 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. Further information regarding our accounting policies related to past due loans, nonaccrual loans and loans to borrowers experiencing financial difficulty 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 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 Commercial and Industrial (“C&I”), Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied Commercial Real Estate (“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 March 31, 2023 and 2022, and December 31, 2022, the Company’s reserve for unfunded commitments totaled $ 10,397,000 , $ 7,471,000 and $ 12,323,000 , 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/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. There was no impairment recorded for the three-months ended March 31, 2023 or 2022 , respectively. 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 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 Earnings (Loss) Unrealized net losses on the Company’s available-for-sale securities, net of applicable income taxes, totaled $ 458,249,000 , $ 209,582,000 and $ 535,228,000 at March 31, 2023, 2022, and December 31, 2022 , respectively, are included in accumulated other comprehensive earnings (loss) as a separate component of shareholders' equity. 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. As of March 31, 2023, 2022, and December 31, 2022, deferred tax assets totaled $ 122,947,000 , $ 57,278,000 and $ 145,511,000 , respectively, and were included in other assets on the consolidated balance sheets. 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 related to a defined group of peers. For stock option grants, the exercise price is established 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 ultimately expected to vest, reduced for forfeitures based on grant-date fair value. See Note 8 for further information. Advertising Costs Advertising costs are expensed as incurred. Per Share Data Net earnings per share (“EPS”) are computed by dividing net earnings by the weighted average number of common shares outstanding during the period. The Company calculates dilutive EPS assuming all outstanding stock options to purchase common shares and unvested restricted stock shares and units 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 reflected by application of the treasury stock method, whereby the proceeds from the exercised options and unearned compensation for both restricted stock and stock options are assumed to be used to purchase common shares at the average market price during the respective period. There were 480,000 and 212,000 anti-dilutive shares for the three-months ended March 31, 2023 and 2022, respectively, that were excluded from the computation of EPS. The following table reconciles the computation of basic EPS to diluted EPS: Net Weighted Earnings Average Per Share (in thousands) Shares Amount For the three-months ended March 31, 2023: Net earnings per share, basic $

Securities

Securities	3 Months Ended
	Mar. 31, 2023
Cash and Cash Equivalents [Abstract]
Securities	Note 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): March 31, 2023 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities $ 508,692 $ 32 $ ( 20,482 ) $ 488,242 Obligations of states and political subdivisions 1,935,401 1,562 ( 163,351 ) 1,773,612 Residential mortgage-backed securities 2,957,314 17 ( 374,161 ) 2,583,170 Commercial mortgage-backed securities 364,956 — ( 15,020 ) 349,936 Corporate bonds and other 112,677 — ( 9,080 ) 103,597 Total securities available-for-sale $ 5,879,040 $ 1,611 $ ( 582,094 ) $ 5,298,557 March 31, 2022 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities 311,860 - ( 10,516 ) 301,344 Obligations of states and political subdivisions 2,590,308 26,628 ( 87,455 ) 2,529,481 Residential mortgage-backed securities 3,450,006 2,139 ( 186,954 ) 3,265,191 Commercial mortgage-backed securities 341,506 924 ( 4,752 ) 337,678 Corporate bonds and other 74,287 - ( 5,486 ) 68,801 Total securities available-for-sale $ 6,767,967 $ 29,691 $ ( 295,163 ) $ 6,502,495 December 31, 2022 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities $ 508,275 $ 11 $ ( 25,737 ) $ 482,549 Obligations of states 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 The Company did no t hold any securities classified as held-to-maturity at March 31, 2023, March 31, 2022, or December 31, 2022. 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 March 31, 2023 and 2022, and 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 March 31, 2023, by contractual and expected maturity, are shown below (dollars in thousands): Amortized Estimated Cost Basis Fair Value Due within one year $ 267,375 $ 264,338 Due after one year through five years 1,499,938 1,420,069 Due after five years through ten years 3,126,228 2,771,041 Due after ten years 985,499 843,109 Total $ 5,879,040 $ 5,298,557 The following tables disclose as of March 31, 2023 and 2022, and December 31, 2022 , 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 (dollars in thousands): Less than 12 Months 12 Months or Longer Total March 31, 2023 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 191,725 $ 4,193 $ 292,587 $ 16,289 $ 484,312 $ 20,482 Obligations of states and political subdivisions 126,532 1,448 1,470,950 161,903 1,597,482 163,351 Residential mortgage-backed securities 91,738 2,937 2,489,524 371,224 2,581,262 374,161 Commercial mortgage-backed securities 164,301 3,948 185,635 11,072 349,936 15,020 Corporate bonds and other 42,503 1,167 61,094 7,913 103,597 9,080 Total $ 616,799 $ 13,693 $ 4,499,790 $ 568,401 $ 5,116,589 $ 582,094 Less than 12 Months 12 Months or Longer Total March 31, 2022 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 301,344 $ 10,516 $ — $ — $ 301,344 $ 10,516 Obligations of states and political subdivisions 1,518,732 85,015 25,679 2,440 1,544,411 87,455 Residential mortgage-backed securities 2,725,934 163,034 303,344 23,920 3,029,278 186,954 Commercial mortgage-backed securities 202,719 4,752 — — 202,719 4,752 Corporate bonds and other 40,701 2,431 28,100 3,055 68,801 5,486 Total $ 4,789,430 $ 265,748 $ 357,123 $ 29,415 $ 5,146,553 $ 295,163 Less than 12 Months 12 Months or Longer Total December 31, 2022 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 307,012 $ 11,650 $ 173,105 $ 14,087 $ 480,117 $ 25,737 Obligations of states and political subdivisions 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 The number of investments in an unrealized loss position totaled 897 at March 31, 2023. We believe any unrealized losses in the U.S. treasury securities, obligations of state and political subdivisions, residential and commercial mortgage-backed and asset-backed investment securities, and corporate bonds and other at March 31, 2023 and 2022, and December 31, 2022, are due to changes in interest rates and not credit-related events. As such, no allowance for credit losses is required on these securities at March 31, 2023 and 2022, and 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 March 31, 2023, 70.30 % of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 52.94 % are guaranteed by the Texas Permanent School Fund. Securities, carried at approximately $ 3,291,020,000 on March 31, 2023, were pledged as collateral for public or trust fund deposits, repurchase agreements, borrowings and for other purposes required or permitted by law. During the three-months ended March 31, 2023, sales of investment securities that were classified as available-for-sale were $ 145,948,000 . During the three-months ended March 31, 2022, there were no sales of investment securities that were classified as available-for-sale. Gross realized security gains from sales and calls during the first quarter of 2023 and 2022 totaled $ 1,052,000 and $ 33,000 , respectively. Gross realized security losses from sales or calls during the first quarter of 2023 or 2022 totaled $ 1,040,000 and $ 2,000 , respectively. The specific identification method was used to determine cost in order to compute the realized gains and losses.

Loans Held for Investment and A

Loans Held for Investment and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Loans Held for Investment and Allowance for Credit Losses	Note 3 – Loans Held-for-Investment and Allowance for Credit Losses For the periods ended March 31, 2023 and 2022, and December 31, 2022, the following tables 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): March 31, December 31, 2023 2022 2022 Commercial: C&I* $ 954,686 $ 838,049 $ 917,317 Municipal 221,379 191,799 221,090 Total Commercial 1,176,065 1,029,848 1,138,407 Agricultural 77,017 82,883 76,947 Real Estate: Construction & Development 921,190 806,211 959,426 Farm 307,706 225,942 306,322 Non-Owner Occupied CRE 737,117 636,160 732,089 Owner Occupied CRE 1,043,018 881,181 954,400 Residential 1,628,841 1,352,162 1,575,758 Total Real Estate 4,637,872 3,901,656 4,527,995 Consumer: Auto 537,410 419,818 550,635 Non-Auto 147,851 131,964 147,884 Total Consumer 685,261 551,782 698,519 Total Loans 6,576,215 5,566,169 6,441,868 Less: Allowance for credit losses ( 80,818 ) ( 66,913 ) ( 75,834 ) Loans, net $ 6,495,397 $ 5,499,256 $ 6,366,034 * All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees and costs, as disclosed on the face of the consolidated balance sheet. Outstanding loan balances at March 31, 2023 and 2022, and December 31, 2022, are net of unearned income, including net deferred loan fees. At March 31, 2023, $ 4,230,606,000 in loans held by our bank subsidiary were subject to blanket liens as security for a line of credit with the Federal Home Loan Bank of Dallas ("FHLB"). At March 31, 2023, this available line of credit was $ 2,396,844,000 . At March 31, 2023 , there was no balance outstanding under this line of credit. The Company’s nonaccrual loans and loans still accruing and past due 90 days or more are as follows (dollars in thousands): March 31, December 31, 2023 2022 2022 Nonaccrual loans $ 24,171 $ 28,743 $ 24,325 Loans still accruing and past due 90 days or more 22 11 — Total nonperforming loans (1) $ 24,193 $ 28,754 $ 24,325 (1) With the adoption of ASU 2022-02, effective January 1, 2023, troubled debt restructuring ("TDR") accounting has been eliminated. The Company ha d $ 24,389,000 , $ 28,754,000 and $ 24,325,000 in nonaccrual, past due 90 days or more and still accruing, and foreclosed assets at March 31, 2023 and 2022, and December 31, 2022 , respectively. Nonaccrual loans at March 31, 2023 and 2022, and December 31, 2022, consisted of the following (dollars in thousands): March 31, December 31, 2023 2022 2022 Commercial: C&I $ 5,343 $ 4,711 $ 5,057 Municipal — — — Total Commercial 5,343 4,711 5,057 Agricultural 161 4,338 324 Real Estate: Construction & Development 773 594 1,567 Farm 452 1,209 85 Non-Owner Occupied CRE 2,907 2,574 2,321 Owner Occupied CRE 6,823 7,288 7,092 Residential 7,232 7,587 7,419 Total Real Estate 18,187 19,252 18,484 Consumer: Auto 398 402 429 Non-Auto 82 40 31 Total Consumer 480 442 460 Total $ 24,171 $ 28,743 $ 24,325 No significant additional funds are committed to be advanced in connection with nonaccrual loans as of March 31, 2023. Summary information on the allowance for credit losses for the three-months ended March 31, 2023 and 2022, are outlined by portfolio segment in the following tables (dollars in thousands): Three-Months Ended March 31, 2023 C&I Municipal Agricultural Construction Farm Beginning balance $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 Provision for loan losses ( 64 ) 41 ( 28 ) 2,084 ( 20 ) Recoveries 52 — 201 100 — Charge-offs ( 34 ) — — — — Ending balance $ 16,083 $ 1,067 $ 1,214 $ 28,627 $ 1,937 Three-Months Ended March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 Provision for loan losses ( 49 ) 2,013 624 70 36 4,707 Recoveries 25 7 3 132 45 565 Charge-offs — — — ( 190 ) ( 64 ) ( 288 ) Ending balance $ 9,051 $ 11,948 $ 9,702 $ 857 $ 332 $ 80,818 Three-Months Ended March 31, 2022 C&I Municipal Agricultural Construction Farm Beginning balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Provision for loan losses 3,455 1,070 289 360 210 Recoveries 156 — 25 — — Charge-offs ( 154 ) — — ( 100 ) — Ending balance $ 15,737 $ 1,418 $ 1,911 $ 17,887 $ 873 Three-Months Ended March 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 ( 2,278 ) 789 ( 163 ) ( 20 ) 35 3,747 Recoveries 55 7 5 66 46 360 Charge-offs — ( 88 ) ( 146 ) ( 73 ) ( 98 ) ( 659 ) Ending balance $ 8,499 $ 11,536 $ 7,829 $ 869 $ 354 $ 66,913 Additionally, the Company records a reserve for unfunded commitments in other liabilities which totaled $ 10,397,000 , $ 7,471,000 and $ 12,323,000 at March 31, 2023 and 2022, and December 31, 2022, respectively. The provision for loan losses of $ 4,707,000 for the three-months ended March 31, 2023 is combined with the reversal of the provision for unfunded commitments of $ 1,926,000 and reported in the net aggregate of $ 2,781,000 under the provision for credit losses in the consolidated statement of earnings for the three-months ended March 31, 2023. The $ 3,747,000 provision for loan losses for the three-months ended March 31, 2022 above is combined with the provision for unfunded commitments of $ 1,035,000 and reported in the aggregate of $ 4,782,000 under the provision for credit losses for the three-months ended March 31, 2022. The Company’s loans that are ind ividually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of March 31, 2023 and 2022, and December 31, 2022, are summarized in the following tables by loan segment (dollars in thousands): March 31, 2023 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ — $ 5,343 $ 20,141 $ 25,484 $ 3,582 $ 3,941 $ 7,523 Municipal — — 907 907 — — — Total Commercial — 5,343 21,048 26,391 3,582 3,941 7,523 Agricultural — 161 912 1,073 86 485 571 Real Estate: Construction & Development 397 376 18,813 19,586 57 2,340 2,397 Farm 452 — 1,232 1,684 — — — Non-Owner Occupied CRE 2,136 771 28,557 31,464 152 1,929 2,081 Owner Occupied CRE 4,111 2,712 31,978 38,801 297 2,308 2,605 Residential 4,771 2,461 28,463 35,695 259 1,404 1,663 Total Real Estate 11,867 6,320 109,043 127,230 765 7,981 8,746 Consumer: Auto — 398 1,250 1,648 1 2 3 Non-Auto — 82 632 714 — 2 2 Total Consumer — 480 1,882 2,362 1 4 5 Total $ 11,867 $ 12,304 $ 132,885 $ 157,056 $ 4,434 $ 12,411 $ 16,845 March 31, 2022 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ 95 $ 4,616 $ 20,620 $ 25,331 $ 2,525 $ 5,268 $ 7,793 Municipal — — 96 96 — — — Total Commercial 95 4,616 20,716 25,427 2,525 5,268 7,793 Agricultural 2,349 1,989 411 4,749 946 276 1,222 Real Estate: Construction & Development — 594 9,632 10,226 44 1,446 1,490 Farm 1,209 — 1,214 2,423 — — — Non-Owner Occupied CRE 2,463 111 32,705 35,279 10 3,006 3,016 Owner Occupied CRE 6,187 1,101 29,608 36,896 96 3,149 3,245 Residential 4,954 2,633 27,689 35,276 306 1,668 1,974 Total Real Estate 14,813 4,439 100,848 120,100 456 9,269 9,725 Consumer: Auto — 402 1,092 1,494 1 2 3 Non-Auto — 40 350 390 — 1 1 Total Consumer — 442 1,442 1,884 1 3 4 Total $ 17,257 $ 11,486 $ 123,417 $ 152,160 $ 3,928 $ 14,816 $ 18,744 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 2,287 28,564 35,983 229 1,215 1,444 Total Real Estate 12,134 6,349 100,167 118,650 531 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 $ 12,075 $ 126,373 $ 150,698 $ 4,167 $ 10,374 $ 14,541 The Company’s allowance for loans that are individually evaluated for credit losses and collectively evaluated for credit losses as of March 31, 2023 and 2022, and December 31, 2022, are summarized in the following table by loan segment (dollars 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. March 31, 2023 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 7,523 $ — $ 571 $ 2,397 $ — Loans collectively evaluated for credit losses 8,560 1,067 643 26,230 1,937 Total $ 16,083 $ 1,067 $ 1,214 $ 28,627 $ 1,937 March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 2,081 $ 2,605 $ 1,663 $ 3 $ 2 $ 16,845 Loans collectively evaluated for credit losses 6,970 9,343 8,039 854 330 63,973 Total $ 9,051 $ 11,948 $ 9,702 $ 857 $ 332 $ 80,818 March 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 7,793 $ — $ 1,222 $ 1,490 $ — Loans collectively evaluated for credit losses 7,944 1,418 689 16,397 873 Total $ 15,737 $ 1,418 $ 1,911 $ 17,887 $ 873 March 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 3,016 $ 3,245 $ 1,974 $ 3 $ 1 $ 18,744 Loans collectively evaluated for credit losses 5,483 8,291 5,855 866 353 48,169 Total $ 8,499 $ 11,536 $ 7,829 $ 869 $ 354 $ 66,913 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 The Company’s recorded investment in loans as of March 31, 2023 and 2022, and December 31, 2022, related to the balance in the allowance for credit losses follows below (dollars in thousands): March 31, 2023 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 25,484 $ 907 $ 1,073 $ 19,586 $ 1,684 Loans collectively evaluated for credit losses 929,202 220,472 75,944 901,604 306,022 Total $ 954,686 $ 221,379 $ 77,017 $ 921,190 $ 307,706 March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 31,464 $ 38,801 $ 35,695 $ 1,648 $ 714 $ 157,056 Loans collectively evaluated for credit losses 705,653 1,004,217 1,593,146 535,762 147,137 6,419,159 Total $ 737,117 $ 1,043,018 $ 1,628,841 $ 537,410 $ 147,851 $ 6,576,215 March 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 25,331 $ 96 $ 4,749 $ 10,226 $ 2,423 Loans collectively evaluated for credit losses 812,718 191,703 78,134 795,985 223,519 Total $ 838,049 $ 191,799 $ 82,883 $ 806,211 $ 225,942 March 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 35,279 $ 36,896 $ 35,276 $ 1,494 $ 390 $ 152,160 Loans collectively evaluated for credit losses 600,881 844,285 1,316,886 418,324 131,574 5,414,009 Total $ 636,160 $ 881,181 $ 1,352,162 $ 419,818 $ 131,964 $ 5,566,169 December 31, 2022 C&I Municipal Agricultural 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 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 ongoing 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 summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at March 31, 2023 (dollars in millions): March 31, 2023 2022 2021 2020 2019 Prior Revolving Total C&I Risk rating: Pass $ 155 $ 548 $ 132 $ 48 $ 19 $ 28 $ — $ 930 Special mention 1 3 1 2 1 — — 8 Substandard 1 6 4 2 1 3 — 17 Doubtful — — — — — — — — Total $ 157 $ 557 $ 137 $ 52 $ 21 $ 31 $ — $ 955 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Municipal Risk rating: Pass $ 3 $ 82 $ 19 $ 15 $ 2 $ 99 $ — $ 220 Special mention — — — — 1 — — 1 Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 3 $ 82 $ 19 $ 15 $ 3 $ 99 $ — $ 221 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Agricultural Risk rating: Pass $ 16 $ 51 $ 5 $ 2 $ 1 $ 1 $ — $ 76 Special mention — 1 — — — — — 1 Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 16 $ 52 $ 5 $ 2 $ 1 $ 1 $ — $ 77 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Construction & Development Risk rating: Pass $ 111 $ 586 $ 124 $ 56 $ 12 $ 13 $ — $ 902 Special mention 3 9 — — — — — 12 Substandard 2 4 1 — — — — 7 Doubtful — — — — — — — — Total $ 116 $ 599 $ 125 $ 56 $ 12 $ 13 $ — $ 921 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Farm Risk rating: Pass $ 12 $ 142 $ 82 $ 31 $ 11 $ 28 $ — $ 306 Special mention — — — — — — — — Substandard — 2 — — — — — 2 Doubtful — — — — — — — — Total $ 12 $ 144 $ 82 $ 31 $ 11 $ 28 $ — $ 308 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 36 $ 244 $ 192 $ 96 $ 47 $ 91 $ — $ 706 Special mention — — 1 — 11 6 — 18 Substandard — 2 2 1 2 6 — 13 Doubtful — — — — — — — — Total $ 36 $ 246 $ 195 $ 97 $ 60 $ 103 $ — $ 737 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 73 $ 316 $ 247 $ 124 $ 74 $ 170 $ — $ 1,004 Special mention — 3 1 2 6 1 — 13 Substandard 1 3 2 1 3 16 — 26 Doubtful — — — — — — — — Total $ 74 $ 322 $ 250 $ 127 $ 83 $ 187 $ — $ 1,043 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Residential Risk rating: Pass $ 95 $ 479 $ 355 $ 181 $ 78 $ 268 $ 137 $ 1,593 Special mention — 1 3 2 — 4 1 11 Substandard 1 5 2 3 2 9 3 25 Doubtful — — — — — — — — Total $ 96 $ 485 $ 360 $ 186 $ 80 $ 281 $ 141 $ 1,629 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Auto Risk rating: Pass $ 51 $ 296 $ 116 $ 46 $ 20 $ 6 $ — $ 535 Special mention — — — — — — — — Substandard — 1 — 1 — — — 2 Doubtful — — — — — — — — Total $ 51 $ 297 $ 116 $ 47 $ 20 $ 6 $ — $ 537 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Non-Auto Risk rating: Pass $ 21 $ 74 $ 34 $ 7 $ 2 $ 2 $ 7 $ 147 Special mention — — — — — — — — Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 21 $ 74 $ 35 $ 7 $ 2 $ 2 $ 7 $ 148 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Total Loans Risk rating: Pass $ 573 $ 2,818 $ 1,306 $ 606 $ 266 $ 706 $ 144 $ 6,419 Special mention 4 17 6 6 19 11 1 64 Substandard 5 23 12 8 8 34 3 93 Doubtful — — — — — — — — Total $ 582 $ 2,858 $ 1,324 $ 620 $ 293 $ 751 $ 148 $ 6,576 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — The following summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at March 31, 2022 (dollars in millions): March 31, 2022 2021 2020 2019 2018 Prior Revolving Total C&I Risk rating: Pass $ 163 $ 438 $ 121 $ 42 $ 24 $ 26 $ — $ 814 Special mention — 4 — 3 — — — 7 Substandard 3 7 3 2 2 — — 17 Doubtful — — — — — — — — Total $ 166 $ 449 $ 124 $ 47 $ 26 $ 26 $ — $ 838 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Municipal Risk rating: Pass $ 25 $ 33 $ 15 $ 5 $ 21 $ 93 $ — $ 192 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 25 $ 33 $ 15 $ 5 $ 21 $ 93 $ — $ 192 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Agricultural Risk rating: Pass $ 20 $ 47 $ 6 $ 4 $ 1 $ 1 $ — $ 79 Special mention — — — — — — — — Substandard — 4 — — — — — 4 Doubtful — — — — — — — — Total $ 20 $ 51 $ 6 $ 4 $ 1 $ 1 $ — $ 83 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Construction & Development Risk rating: Pass $ 118 $ 524 $ 106 $ 21 $ 13 $ 13 $ — $ 795 Special mention — 2 — — — — — 2 Substandard 1 6 1 1 — — — 9 Doubtful — — — — — — — — Total $ 119 $ 532 $ 107 $ 22 $ 13 $ 13 $ — $ 806 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Farm Risk rating: Pass $ 25 $ 110 $ 39 $ 13 $ 8 $ 28 $ — $ 223 Special mention — — — — — — — — Substandard — — 1 — 1 1 — 3 Doubtful — — — — — — — — Total $ 25 $ 110 $ 40 $ 13 $ 9 $ 29 $ — $ 226 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 52 $ 211 $ 123 $ 62 $ 52 $ 101 $ — $ 601 Special mention — — 1 11 1 8 — 21 Substandard — — 5 3 1 5 — 14 Doubtful — — — — — — — Total $ 52 $ 211 $ 129 $ 76 $ 54 $ 114 $ — $ 636 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 100 $ 258 $ 136 $ 97 $ 88 $ 166 $ — $ 845 Special mention — 1 2 1 — 1 — 5 Substandard 2 4 2 3 9 11 — 31 Doubtful — — — — — — — — Total $ 102 $ 263 $ 140 $ 101 $ 97 $ 178 $ — $ 881 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Residential Risk rating: Pass $ 107 $ 441 $ 208 $ 106 $ 78 $ 266 $ 109 $ 1,315 Special mention — 3 4 — 1 4 1 13 Substandard 1 4 3 2 2 11 1 24 Doubtful — — — — — — — — Total $ 108 $ 448 $ 215 $ 108 $ 81 $ 281 $ 111 $ 1,352 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Auto Risk rating: Pass $ 68 $ 197 $ 89 $ 44 $ 14 $ 6 $ — $ 418 Special mention — — — — — — — — Substandard — — 1 1 — — — 2 Doubtful — — — — — — — — Total $ 68 $ 197 $ 90 $ 45 $ 14 $ 6 $ — $ 420 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Auto Risk rating: Pass $ 26 $ 68 $ 19 $ 6 $ 3 $ 2 $ 7 $ 131 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 26 $ 69 $ 19 $ 6 $ 3 $ 2 $ 7 $ 132 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Total Loans Risk rating: Pass $ 704 $ 2,327 $ 862 $ 400 $ 302 $ 702 $ 116 $ 5,413 Special mention — 10 7 15 2 13 1 48 Substandard 7 26 16 12 15 28 1 105 Doubtful — — — — — — — — Total $ 711 $ 2,363 $ 885 $ 427 $ 319 $ 743 $ 118 $ 5,566 The following summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at December 31, 2022 (dollars 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 At March 31, 2023 and 2022, and December 31, 2022, the Company’s past due loans are as follows (dollars in thousands): March 31, 2023 15-59 60-89 Greater Total Past Current Total Loans 90 Days Commercial: C&I $ 3,952 $ 292 $ 1,825 $ 6,069 $ 948,617 $ 954,686 $ 14 Municipal 209 — — 209 221,170 221,379 — Total Commercial 4,161 292 1,825 6,278 1,169,787 1,176,065 14 Agricultural 816 25 24 865 76,152 77,017 — Real Estate: Construction & Development 7,058 332 — 7,390 913,800 921,190 — Farm 264 — 372 636 307,070 307,706 — Non-Owner Occupied CRE 3,183 — 695 3,878 733,239 737,117 — Owner Occupied CRE 3,886 — — 3,886 1,039,132 1,043,018 — Residential 7,484 744 767 8,995 1,619,846 1,628,841 Total Real Estate 21,875 1,076 1,834 24,785 4,613,087 4,637,872 — Consumer: Auto 683 41 9 733 536,677 537,410 8 Non-Auto 136 — — 136 147,715 147,851 — Total Consumer 819 41 9 869 684,392 685,261 8 Total $ 27,671 $ 1,434 $ 3,692 $ 32,797 $ 6,543,418 $ 6,576,215 $ 22 March 31, 2022 15-59 60-89 Greater Total Past Current Total Loans 90 Days Commercial: C&I $ 8,971 $ 36 $ 1,658 $ 10,665 $ 827,384 $ 838,049 $ — Municipal 153 — — 153 191,646 191,799 — Total Commercial 9,124 36 1,658 10,818 1,019,030 1,029,848 — Agricultural 4,846 — — 4,846 78,037 82,883 — Real Estate: Construction & Development 3,562 — 37 3,599 802,612 806,211 — Farm 7 — 445 452 225,490 225,942 — Non-Owner Occupied CRE 5,066 108 — 5,174 630,986 636,160 — Owner Occupied CRE 2,789 1,028 525 4,342 876,839 881,181 — Residential 6,757 224 250 7,231 1,344,931 1,352,162 — Total Real Estate 18,181 1,360 1,257 20,798 3,880,858 3,901,656 — Consumer: Auto 302 49 20 371 419,447 419,818 8 Non-Auto 125 — 3 128 131,836 131,964 3 Total Consumer 427 49 23 499 551,283 551,782 11 Total $ 32,578 $ 1,445 $ 2,938 $ 36,961 $ 5,529,208 $ 5,566,169 $ 11 December 31, 2022 15-59 60-89 Greater Total Past 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 $ — * 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. Modifications of receivables to debtors experiencing financial difficulty On January 1, 2023, the Company adopted the accounting guidance in ASU 2022-02, which eliminates the recognition and measurement of a TDR. Due to the removal of the TDR designation, the Company evaluates all loan restructurings according to the accounting guidance for loan modifications to determine if the restructuring results in a new loan or a continuation of the existing loan. Loan modifications to borrowers experiencing financial difficulty that result in a direct change in the timing or amount of contractual cash flows include situations where there is principal forgiveness, term extensions, interest rate reduction, and combinations of the listed modifications. Therefore, the disclosures related to loan restructurings are only for modifications that directly affect cash flows. An assessment of whether a borrower is experiencing financial difficulty is made on the date of a modification. Because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance for credit losses due to the measurement methodologies used to estimate the allowance, a change to the allowance for credit losses is generally not recorded upon modification. During the three-months ended March 31, 2023, loan modifications made to borrowers experiencing financial difficulty was insignificant.

Loans Held for Sale

Loans Held for Sale	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Loans Held for Sale	Note 4 - L oans Held-for-Sale Loans held-for-sale totaled $ 11,996,000 , $ 27,670,000 and $ 11,965,000 at March 31, 2023 and 2022, and December 31, 2022, respectively. At March 31, 2023 and 2022, and December 31, 2022, $ 230,000 , $ 5,288,000 and $ 1,468,000 , respectively, are valued at the lower of cost or fair value, and the remaining amounts are valued under the fair value option. 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 9). 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 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	3 Months Ended
	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 5 - Derivative Financial Instruments The Company enters into interest rate lock commitments (“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 9), 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 9). 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 and are reflected in the gain on sale and fees on mortgage loans in the consolidated statement of earnings. The following tables provide the outstanding notional balances and fair values of outstanding derivative positions (dollars in thousands): March 31, 2023: Outstanding Asset Liability IRLCs $ 58,706 $ 827 $ — Forward mortgage-backed securities trades 69,500 — 334 March 31, 2022: Outstanding Asset Liability IRLCs $ 106,806 $ 276 $ — Forward mortgage-backed securities trades 115,000 2,103 — December 31, 2022: Outstanding Asset Liability IRLCs $ 41,664 $ 400 $ — Forward mortgage-backed securities trades 45,000 85 —

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Borrowings	Note 6 – Borrowings Borrowings consisted of the following (dollars in thousands): March 31, December 31, 2023 2022 2022 Securities sold under agreements with customers to repurchase $ 608,299 $ 716,717 $ 618,829 Federal funds purchased 3,575 20,825 2,625 Other borrowings 21,053 21,053 21,053 Total $ 632,927 $ 758,595 $ 642,507 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 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. There was no outstanding balance under the line of credit as of March 31, 2023 and 2022, or December 31, 2022. During 2021, the Company began investing in qualifying Community Development Entities ("CDE") under the federal New Market Tax Credits ("NMTC") program. See Note 7 for further discussion of our activity and related balances on the consolidated balance sheets, including the $ 21,053,000 in other borrowings shown above.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Note 7 - Income Taxes Income tax expense was $ 11,688,000 for the first quarter of 2023 as compared to $ 10,341,000 for the same period in 2022. The Company’s effective tax rates on pretax income were 18.19 % and 15.59 % for the first quarters of 2023 and 2022, respectively. The effective tax rates differ from the statutory federal tax rate of 21 % primarily due to tax exempt interest income earned on certain investment securities and loans, the deductibility of dividends paid to our employee stock ownership plan, excess tax benefits for distributions under our deferred compensation plan and vesting of equity awards, and NMTC benefits. 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 at March 31, 2023 and December 31, 2022, respectively, and $ 55,000 at March 31, 2022, which is included in other assets on the consolidated balance sheet. New Market Tax Credit Investments - 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 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 yield method and related tax credits are allocated to the Company. At March 31, 2023, March 31, 2022, and December 31, 2022, the consolidated balance sheet of the Company included a $ 18,000,000 loan to the investee in loans and the $ 21,053,000 leveraged loan from the investee in other borrowings (see Note 6). At March 31, 2023 and 2022, and December 31, 2022, the consolidated balance sheet of the Company included CDE investments in other assets of $ 26,553,000 , $ 29,000,000 , and $ 26,825,000 , respectively.

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Stock-based Compensation	Note 8 - 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 March 31, 2023, the Company had 1,877,004 shares of stock remaining for issuance under the plan. The 2021 Plan superseded 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 arrangements for the benefit of employees, senior and 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 three-months ended March 31, 2023 and 2022. For the Three-Months Ended March 31, 2023 2022 Restricted Weighted Restricted Weighted Balance at beginning of period 39,657 $ 47.83 22,597 $ 48.91 Grants — — — — Vesting — — — — Forfeited/expired ( 2,888 ) 47.87 — — Balance at end of period 36,769 $ 47.83 22,597 $ 48.91 Performance Stock Units Also under the 2021 Plan, the Company awards performance-based restricted stock units ("PSUs") to employees, senior and executive officers and directors. 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 % each on 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 most probable outcome of the performance condition, adjusted for the 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 three-months ended March 31, 2023 and 2022. For the Three-Months Ended March 31, 2023 2022 Performance-Based Restricted Weighted Performance-Based Restricted Weighted Balance at beginning of period 47,082 $ 48.00 22,597 $ 48.91 Grants — — — — Vesting — — — — Forfeited/expired ( 3,456 ) 48.04 — — Balance at end of period 43,626 $ 48.00 22,597 $ 48.91 Restricted Stock Awards Under the 2021 Plan, the Company grants restricted stock awards under compensation arrangements for the benefit of employees, senior and executive officers and directors. Restricted stock awards are subject to time-based vesting. The total number of restricted stock awards granted represents the maximum number of shares of restricted stock eligible to vest based upon the service conditions set forth in the grant agreements. The following table summarizes information about vested and unvested restricted stock. For the Three-Months Ended March 31, 2023 2022 Restricted Weighted Restricted Weighted Balance at beginning of period 24,813 $ 36.21 46,598 $ 35.75 Grants — — 615 49.60 Vesting ( 2,872 ) 28.25 ( 3,161 ) 32.06 Forfeited/expired ( 1,105 ) 29.70 ( 200 ) 29.70 Balance at end of period 20,836 $ 37.53 43,852 $ 36.24 The total fair value of restricted stock vested for the three-months ended March 31, 2023 and 2022, was $ 98,000 and $ 148,000 , respectively. The Company recorded restricted stock unit, performance-based restricted stock unit and restricted stock award expense for employees of $ 358,000 and $ 426,000 for the three-months ended March 31, 2023 and 2022, respectively. The Company recorded director expense related to these restricted stock grants of $ 150,000 and $ 170,000 , for the three-months ended March 31, 2023 and 2022, respectively. As of March 31, 2023 and 2022, there were $ 2,576,000 and $ 2,436,000 respectively, of total unrecognized compensation cost related to unvested restricted stock, restricted stock units and performance-based restricted stock units which is expected to be recognized over a weighted-average period of 1.17 years and 1.05 years, respectively. At March 31, 2023 and 2022, and December 31, 2022, there was $ 82,000 , $ 59,000 and $ 74,000 , respectively, accrued in other liabilities related to dividends declared to be paid upon vesting. Stock Option Plans Prior to the 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 grant 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 three-months ended March 31, 2023 is presented in the table and narrative below:​​​​​​​ Shares Weighted- Outstanding, December 31, 2022 1,490,413 $ 29.99 Granted — — Exercised ( 47,620 ) 19.03 Cancelled ( 32,255 ) 43.69 Outstanding, March 31, 2023 1,410,538 30.05 Exercisable, March 31, 2023 722,398 $ 22.27 The options outstanding at March 31, 2023 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 Company grants incentive stock options for a fixed number of shares with an exercise price equal to the fair value of the shares at the date of grant to employees. The Company recorded stock option expense totaling $ 444,000 and $ 316,000 for the three-months ended March 31, 2023 and 2022, respectively. As of March 31, 2023, there was $ 4,903,000 of total unrecognized compensation cost related to unvested share-based compensation arrangements granted under the plans. That cost is expected to be recognized over a weighted-average period of 1.89 years. The total fair value of shares vested during the three-months ended March 31, 2023 and 2022 was $ 15,000 and $ 65,000 , respectively.

Fair Value Disclosures

Fair Value Disclosures	3 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Note 9 - 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 prepayment 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 three-months ended March 31, 2023 and 2022, and the year ended December 31, 2022. 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, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands): March 31, 2023 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 488,242 $ — $ — $ 488,242 Obligations of state and political subdivisions — 1,773,612 — 1,773,612 Corporate bonds — 99,620 — 99,620 Residential mortgage-backed securities — 2,583,170 — 2,583,170 Commercial mortgage-backed securities — 349,936 — 349,936 Other securities 3,977 — — 3,977 Total $ 492,219 $ 4,806,338 $ — $ 5,298,557 Loans held-for-sale $ — $ 11,766 $ — $ 11,766 IRLCs $ — $ 827 $ — $ 827 Forward mortgage-backed securities trades $ — $ ( 334 ) $ — $ ( 334 ) March 31, 2022 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 301,344 $ — $ — $ 301,344 Obligations of states and political subdivisions — 2,529,481 — 2,529,481 Corporate bonds — 64,581 — 64,581 Residential mortgage-backed securities — 3,265,191 — 3,265,191 Commercial mortgage-backed securities — 337,678 — 337,678 Other securities 4,220 — — 4,220 Total $ 305,564 $ 6,196,931 $ — $ 6,502,495 Loans held-for-sale $ — $ 22,382 $ — $ 22,382 IRLCs $ — $ 276 $ — $ 276 Forward mortgage-backed securities trades $ — $ 2,103 $ — $ 2,103 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 trades $ — $ 85 $ — $ 85 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 (dollars in thousands): March 31, December 31, 2023 2022 2022 Unpaid principal balance on loans held-for-sale $ 11,416 $ 22,233 $ 10,226 Net unrealized gains on loans held-for-sale 350 149 271 Loans held-for-sale at fair value $ 11,766 $ 22,382 $ 10,497 The following table summarizes the Company’s gains on sale and fees of mortgage loans for the three-months ended March 31, 2023 and 2022 (dollars in thousand): Three-Months Ended 2023 2022 Realized gain on sale and fees on mortgage loans* $ 2,859 $ 5,998 Change in fair value on loans held-for-sale and IRLCs 534 ( 1,915 ) Change in forward mortgage-backed securities trades ( 419 ) 2,250 Total gain on sale of mortgage loans $ 2,974 $ 6,333 * This includes gains 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 March 31, 2023, March 31, 2022, or December 31, 2022 . No significant credit losses were recognized on mortgage loans held-for-sale for the three-months ended March 31, 2023 and 2022. 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 non-recurring basis during the three-months ended March 31, 2023 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 three-months ended March 31, 2023 and 2022. At March 31, 2023, other real estate owned totaled $ 175,000 . At March 31, 2022 and December 31, 2022 , 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 were as follows (dollars in thousands). March 31, December 31, 2023 2022 2022 Carrying Estimated Carrying Estimated Carrying Estimated Fair Value Cash and due from banks $ 224,875 $ 224,875 $ 203,187 $ 203,187 $ 293,286 $ 293,286 Level 1 Interest-bearing demand deposits 221,336 221,336 394,566 394,566 37,392 37,392 Level 1 Available-for-sale securities 5,298,557 5,298,557 6,502,495 6,502,495 5,474,359 5,474,359 Levels 1 Loans held-for-investment, net of 6,495,397 6,464,027 5,499,256 5,522,778 6,366,034 6,372,859 Level 3 Loans held-for-sale 11,996 12,018 27,670 26,985 11,965 11,965 Level 2 Accrued interest receivable 50,658 50,658 48,066 48,066 58,162 58,162 Level 2 Deposits with stated maturities 739,498 736,434 449,130 449,987 524,666 518,811 Level 2 Deposits with no stated maturities 10,196,920 10,196,920 10,550,695 10,550,695 10,480,841 10,480,841 Level 1 Borrowings 632,927 632,927 758,595 758,595 642,507 642,507 Level 2 Accrued interest payable 3,617 3,617 268 268 1,121 1,121 Level 2 IRLCs 827 827 276 276 400 400 Level 2 Forward mortgage-backed securities ( 334 ) ( 334 ) 2,103 2,103 85 85 Level 2

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2023
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 March 31, 2023 . 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 the Company and its subsidiaries, all of which are wholly-owned. All significant 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. 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 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 March 31, 2023, 244,559 shares were repurchased and retired (all during the months of June and July 2022) at an average price of $ 38.61 . The Company did not repurchase any shares during the first quarter of 2023.
Other Recently Issued and Effective Authoritative Accounting Guidance	Other Recently Issued and Effective Authoritative Accounting Guidance 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 ASU 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 the 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 did not have a significant impact on our financial statements.
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 three-months ended March 31, 2023 and 2022. 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 marketplace 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. At March 31, 2023 and 2022, and December 31, 2022 , 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 March 31, 2023 and 2022, and December 31, 2022 , 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. Further information regarding our accounting policies related to past due loans, nonaccrual loans and loans to borrowers experiencing financial difficulty 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 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	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 Commercial and Industrial (“C&I”), Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied Commercial Real Estate (“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 March 31, 2023 and 2022, and December 31, 2022, the Company’s reserve for unfunded commitments totaled $ 10,397,000 , $ 7,471,000 and $ 12,323,000 , 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/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. There was no impairment recorded for the three-months ended March 31, 2023 or 2022 , respectively.
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 Earnings (Loss)	Accumulated Other Comprehensive Earnings (Loss) Unrealized net losses on the Company’s available-for-sale securities, net of applicable income taxes, totaled $ 458,249,000 , $ 209,582,000 and $ 535,228,000 at March 31, 2023, 2022, and December 31, 2022 , respectively, 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. As of March 31, 2023, 2022, and December 31, 2022, deferred tax assets totaled $ 122,947,000 , $ 57,278,000 and $ 145,511,000 , respectively, and were included in other assets on the consolidated balance sheets.
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 related to a defined group of peers. For stock option grants, the exercise price is established 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 ultimately expected to vest, reduced for forfeitures based on grant-date fair value. See Note 8 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 shares outstanding during the period. The Company calculates dilutive EPS assuming all outstanding stock options to purchase common shares and unvested restricted stock shares and units 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 reflected by application of the treasury stock method, whereby the proceeds from the exercised options and unearned compensation for both restricted stock and stock options are assumed to be used to purchase common shares at the average market price during the respective period. There were 480,000 and 212,000 anti-dilutive shares for the three-months ended March 31, 2023 and 2022, respectively, that were excluded from the computation of EPS. The following table reconciles the computation of basic EPS to diluted EPS: Net Weighted Earnings Average Per Share (in thousands) Shares Amount For the three-months ended March 31, 2023: Net earnings per share, basic $ 52,568 142,665,646 $ 0.37 Effect of stock options and stock grants — 400,365 — Net earnings per share, diluted $ 52,568 143,066,011 $ 0.37 Net Weighted Earnings Average Per Share (in thousands) Shares Amount For the three-months ended March 31, 2022: Net earnings per share, basic $ 55,972 142,558,743 $ 0.39 Effect of stock options and stock grants — 743,320 — Net earnings per share, diluted $ 55,972 143,302,063 $ 0.39

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2023
Accounting Policies [Abstract]
Computation of Basic EPS to Dilutive EPS	The following table reconciles the computation of basic EPS to diluted EPS: Net Weighted Earnings Average Per Share (in thousands) Shares Amount For the three-months ended March 31, 2023: Net earnings per share, basic $ 52,568 142,665,646 $ 0.37 Effect of stock options and stock grants — 400,365 — Net earnings per share, diluted $ 52,568 143,066,011 $ 0.37 Net Weighted Earnings Average Per Share (in thousands) Shares Amount For the three-months ended March 31, 2022: Net earnings per share, basic $ 55,972 142,558,743 $ 0.39 Effect of stock options and stock grants — 743,320 — Net earnings per share, diluted $ 55,972 143,302,063 $ 0.39

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2023
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): March 31, 2023 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities $ 508,692 $ 32 $ ( 20,482 ) $ 488,242 Obligations of states and political subdivisions 1,935,401 1,562 ( 163,351 ) 1,773,612 Residential mortgage-backed securities 2,957,314 17 ( 374,161 ) 2,583,170 Commercial mortgage-backed securities 364,956 — ( 15,020 ) 349,936 Corporate bonds and other 112,677 — ( 9,080 ) 103,597 Total securities available-for-sale $ 5,879,040 $ 1,611 $ ( 582,094 ) $ 5,298,557 March 31, 2022 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities 311,860 - ( 10,516 ) 301,344 Obligations of states and political subdivisions 2,590,308 26,628 ( 87,455 ) 2,529,481 Residential mortgage-backed securities 3,450,006 2,139 ( 186,954 ) 3,265,191 Commercial mortgage-backed securities 341,506 924 ( 4,752 ) 337,678 Corporate bonds and other 74,287 - ( 5,486 ) 68,801 Total securities available-for-sale $ 6,767,967 $ 29,691 $ ( 295,163 ) $ 6,502,495 December 31, 2022 Gross Gross Amortized Unrealized Unrealized Estimated Cost Basis Holding Gains Holding Losses Fair Value Securities available-for-sale: U.S. Treasury securities $ 508,275 $ 11 $ ( 25,737 ) $ 482,549 Obligations of states 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
Amortized Cost and Estimated Fair Value of Available-for-Sale Securities	The amortized cost and estimated fair value of available-for-sale securities at March 31, 2023, by contractual and expected maturity, are shown below (dollars in thousands): Amortized Estimated Cost Basis Fair Value Due within one year $ 267,375 $ 264,338 Due after one year through five years 1,499,938 1,420,069 Due after five years through ten years 3,126,228 2,771,041 Due after ten years 985,499 843,109 Total $ 5,879,040 $ 5,298,557
Continuous Unrealized-Loss Position of Available-for-Sale Securities	The following tables disclose as of March 31, 2023 and 2022, and December 31, 2022 , 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 (dollars in thousands): Less than 12 Months 12 Months or Longer Total March 31, 2023 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 191,725 $ 4,193 $ 292,587 $ 16,289 $ 484,312 $ 20,482 Obligations of states and political subdivisions 126,532 1,448 1,470,950 161,903 1,597,482 163,351 Residential mortgage-backed securities 91,738 2,937 2,489,524 371,224 2,581,262 374,161 Commercial mortgage-backed securities 164,301 3,948 185,635 11,072 349,936 15,020 Corporate bonds and other 42,503 1,167 61,094 7,913 103,597 9,080 Total $ 616,799 $ 13,693 $ 4,499,790 $ 568,401 $ 5,116,589 $ 582,094 Less than 12 Months 12 Months or Longer Total March 31, 2022 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 301,344 $ 10,516 $ — $ — $ 301,344 $ 10,516 Obligations of states and political subdivisions 1,518,732 85,015 25,679 2,440 1,544,411 87,455 Residential mortgage-backed securities 2,725,934 163,034 303,344 23,920 3,029,278 186,954 Commercial mortgage-backed securities 202,719 4,752 — — 202,719 4,752 Corporate bonds and other 40,701 2,431 28,100 3,055 68,801 5,486 Total $ 4,789,430 $ 265,748 $ 357,123 $ 29,415 $ 5,146,553 $ 295,163 Less than 12 Months 12 Months or Longer Total December 31, 2022 Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 307,012 $ 11,650 $ 173,105 $ 14,087 $ 480,117 $ 25,737 Obligations of states and political subdivisions 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

Loans Held for Investment and_2

Loans Held for Investment and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Loans Held-for-Investment by Portfolio Segment	Loans held-for-investment by portfolio segment are as follows (dollars in thousands): March 31, December 31, 2023 2022 2022 Commercial: C&I* $ 954,686 $ 838,049 $ 917,317 Municipal 221,379 191,799 221,090 Total Commercial 1,176,065 1,029,848 1,138,407 Agricultural 77,017 82,883 76,947 Real Estate: Construction & Development 921,190 806,211 959,426 Farm 307,706 225,942 306,322 Non-Owner Occupied CRE 737,117 636,160 732,089 Owner Occupied CRE 1,043,018 881,181 954,400 Residential 1,628,841 1,352,162 1,575,758 Total Real Estate 4,637,872 3,901,656 4,527,995 Consumer: Auto 537,410 419,818 550,635 Non-Auto 147,851 131,964 147,884 Total Consumer 685,261 551,782 698,519 Total Loans 6,576,215 5,566,169 6,441,868 Less: Allowance for credit losses ( 80,818 ) ( 66,913 ) ( 75,834 ) Loans, net $ 6,495,397 $ 5,499,256 $ 6,366,034
Non-Accrual Loans and Loans Still Accruing and Past Due 90 Days or More	The Company’s nonaccrual loans and loans still accruing and past due 90 days or more are as follows (dollars in thousands): March 31, December 31, 2023 2022 2022 Nonaccrual loans $ 24,171 $ 28,743 $ 24,325 Loans still accruing and past due 90 days or more 22 11 — Total nonperforming loans (1) $ 24,193 $ 28,754 $ 24,325 (1) With the adoption of ASU 2022-02, effective January 1, 2023, troubled debt restructuring ("TDR") accounting has been eliminated.
Schedule of Non-Accrual Loans	Nonaccrual loans at March 31, 2023 and 2022, and December 31, 2022, consisted of the following (dollars in thousands): March 31, December 31, 2023 2022 2022 Commercial: C&I $ 5,343 $ 4,711 $ 5,057 Municipal — — — Total Commercial 5,343 4,711 5,057 Agricultural 161 4,338 324 Real Estate: Construction & Development 773 594 1,567 Farm 452 1,209 85 Non-Owner Occupied CRE 2,907 2,574 2,321 Owner Occupied CRE 6,823 7,288 7,092 Residential 7,232 7,587 7,419 Total Real Estate 18,187 19,252 18,484 Consumer: Auto 398 402 429 Non-Auto 82 40 31 Total Consumer 480 442 460 Total $ 24,171 $ 28,743 $ 24,325
Changes in Allowance for Loan Losses	Summary information on the allowance for credit losses for the three-months ended March 31, 2023 and 2022, are outlined by portfolio segment in the following tables (dollars in thousands): Three-Months Ended March 31, 2023 C&I Municipal Agricultural Construction Farm Beginning balance $ 16,129 $ 1,026 $ 1,041 $ 26,443 $ 1,957 Provision for loan losses ( 64 ) 41 ( 28 ) 2,084 ( 20 ) Recoveries 52 — 201 100 — Charge-offs ( 34 ) — — — — Ending balance $ 16,083 $ 1,067 $ 1,214 $ 28,627 $ 1,937 Three-Months Ended March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Beginning balance $ 9,075 $ 9,928 $ 9,075 $ 845 $ 315 $ 75,834 Provision for loan losses ( 49 ) 2,013 624 70 36 4,707 Recoveries 25 7 3 132 45 565 Charge-offs — — — ( 190 ) ( 64 ) ( 288 ) Ending balance $ 9,051 $ 11,948 $ 9,702 $ 857 $ 332 $ 80,818 Three-Months Ended March 31, 2022 C&I Municipal Agricultural Construction Farm Beginning balance $ 12,280 $ 348 $ 1,597 $ 17,627 $ 663 Provision for loan losses 3,455 1,070 289 360 210 Recoveries 156 — 25 — — Charge-offs ( 154 ) — — ( 100 ) — Ending balance $ 15,737 $ 1,418 $ 1,911 $ 17,887 $ 873 Three-Months Ended March 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 ( 2,278 ) 789 ( 163 ) ( 20 ) 35 3,747 Recoveries 55 7 5 66 46 360 Charge-offs — ( 88 ) ( 146 ) ( 73 ) ( 98 ) ( 659 ) Ending balance $ 8,499 $ 11,536 $ 7,829 $ 869 $ 354 $ 66,913
Schedule of loans that are individually evaluated for credit losses	The Company’s loans that are ind ividually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of March 31, 2023 and 2022, and December 31, 2022, are summarized in the following tables by loan segment (dollars in thousands): March 31, 2023 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ — $ 5,343 $ 20,141 $ 25,484 $ 3,582 $ 3,941 $ 7,523 Municipal — — 907 907 — — — Total Commercial — 5,343 21,048 26,391 3,582 3,941 7,523 Agricultural — 161 912 1,073 86 485 571 Real Estate: Construction & Development 397 376 18,813 19,586 57 2,340 2,397 Farm 452 — 1,232 1,684 — — — Non-Owner Occupied CRE 2,136 771 28,557 31,464 152 1,929 2,081 Owner Occupied CRE 4,111 2,712 31,978 38,801 297 2,308 2,605 Residential 4,771 2,461 28,463 35,695 259 1,404 1,663 Total Real Estate 11,867 6,320 109,043 127,230 765 7,981 8,746 Consumer: Auto — 398 1,250 1,648 1 2 3 Non-Auto — 82 632 714 — 2 2 Total Consumer — 480 1,882 2,362 1 4 5 Total $ 11,867 $ 12,304 $ 132,885 $ 157,056 $ 4,434 $ 12,411 $ 16,845 March 31, 2022 Collateral Collateral Non-Collateral Total Loans Related Related Total Commercial: C&I $ 95 $ 4,616 $ 20,620 $ 25,331 $ 2,525 $ 5,268 $ 7,793 Municipal — — 96 96 — — — Total Commercial 95 4,616 20,716 25,427 2,525 5,268 7,793 Agricultural 2,349 1,989 411 4,749 946 276 1,222 Real Estate: Construction & Development — 594 9,632 10,226 44 1,446 1,490 Farm 1,209 — 1,214 2,423 — — — Non-Owner Occupied CRE 2,463 111 32,705 35,279 10 3,006 3,016 Owner Occupied CRE 6,187 1,101 29,608 36,896 96 3,149 3,245 Residential 4,954 2,633 27,689 35,276 306 1,668 1,974 Total Real Estate 14,813 4,439 100,848 120,100 456 9,269 9,725 Consumer: Auto — 402 1,092 1,494 1 2 3 Non-Auto — 40 350 390 — 1 1 Total Consumer — 442 1,442 1,884 1 3 4 Total $ 17,257 $ 11,486 $ 123,417 $ 152,160 $ 3,928 $ 14,816 $ 18,744 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 2,287 28,564 35,983 229 1,215 1,444 Total Real Estate 12,134 6,349 100,167 118,650 531 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 $ 12,075 $ 126,373 $ 150,698 $ 4,167 $ 10,374 $ 14,541
Schedule of Allowance for Loan Losses by Portfolio Segment	The Company’s allowance for loans that are individually evaluated for credit losses and collectively evaluated for credit losses as of March 31, 2023 and 2022, and December 31, 2022, are summarized in the following table by loan segment (dollars 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. March 31, 2023 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 7,523 $ — $ 571 $ 2,397 $ — Loans collectively evaluated for credit losses 8,560 1,067 643 26,230 1,937 Total $ 16,083 $ 1,067 $ 1,214 $ 28,627 $ 1,937 March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 2,081 $ 2,605 $ 1,663 $ 3 $ 2 $ 16,845 Loans collectively evaluated for credit losses 6,970 9,343 8,039 854 330 63,973 Total $ 9,051 $ 11,948 $ 9,702 $ 857 $ 332 $ 80,818 March 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 7,793 $ — $ 1,222 $ 1,490 $ — Loans collectively evaluated for credit losses 7,944 1,418 689 16,397 873 Total $ 15,737 $ 1,418 $ 1,911 $ 17,887 $ 873 March 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 3,016 $ 3,245 $ 1,974 $ 3 $ 1 $ 18,744 Loans collectively evaluated for credit losses 5,483 8,291 5,855 866 353 48,169 Total $ 8,499 $ 11,536 $ 7,829 $ 869 $ 354 $ 66,913 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
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 March 31, 2023 and 2022, and December 31, 2022, related to the balance in the allowance for credit losses follows below (dollars in thousands): March 31, 2023 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 25,484 $ 907 $ 1,073 $ 19,586 $ 1,684 Loans collectively evaluated for credit losses 929,202 220,472 75,944 901,604 306,022 Total $ 954,686 $ 221,379 $ 77,017 $ 921,190 $ 307,706 March 31, 2023 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 31,464 $ 38,801 $ 35,695 $ 1,648 $ 714 $ 157,056 Loans collectively evaluated for credit losses 705,653 1,004,217 1,593,146 535,762 147,137 6,419,159 Total $ 737,117 $ 1,043,018 $ 1,628,841 $ 537,410 $ 147,851 $ 6,576,215 March 31, 2022 C&I Municipal Agricultural Construction Farm Loans individually evaluated for credit losses $ 25,331 $ 96 $ 4,749 $ 10,226 $ 2,423 Loans collectively evaluated for credit losses 812,718 191,703 78,134 795,985 223,519 Total $ 838,049 $ 191,799 $ 82,883 $ 806,211 $ 225,942 March 31, 2022 (continued) Non-Owner Owner Residential Auto Non-Auto Total Loans individually evaluated for credit losses $ 35,279 $ 36,896 $ 35,276 $ 1,494 $ 390 $ 152,160 Loans collectively evaluated for credit losses 600,881 844,285 1,316,886 418,324 131,574 5,414,009 Total $ 636,160 $ 881,181 $ 1,352,162 $ 419,818 $ 131,964 $ 5,566,169 December 31, 2022 C&I Municipal Agricultural 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
Schedule of Company's Internal Ratings of its Loans Held-for-Investment, Including The Year of Origination, by Portfolio Segments	The following summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at March 31, 2023 (dollars in millions): March 31, 2023 2022 2021 2020 2019 Prior Revolving Total C&I Risk rating: Pass $ 155 $ 548 $ 132 $ 48 $ 19 $ 28 $ — $ 930 Special mention 1 3 1 2 1 — — 8 Substandard 1 6 4 2 1 3 — 17 Doubtful — — — — — — — — Total $ 157 $ 557 $ 137 $ 52 $ 21 $ 31 $ — $ 955 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Municipal Risk rating: Pass $ 3 $ 82 $ 19 $ 15 $ 2 $ 99 $ — $ 220 Special mention — — — — 1 — — 1 Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 3 $ 82 $ 19 $ 15 $ 3 $ 99 $ — $ 221 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Agricultural Risk rating: Pass $ 16 $ 51 $ 5 $ 2 $ 1 $ 1 $ — $ 76 Special mention — 1 — — — — — 1 Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 16 $ 52 $ 5 $ 2 $ 1 $ 1 $ — $ 77 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Construction & Development Risk rating: Pass $ 111 $ 586 $ 124 $ 56 $ 12 $ 13 $ — $ 902 Special mention 3 9 — — — — — 12 Substandard 2 4 1 — — — — 7 Doubtful — — — — — — — — Total $ 116 $ 599 $ 125 $ 56 $ 12 $ 13 $ — $ 921 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Farm Risk rating: Pass $ 12 $ 142 $ 82 $ 31 $ 11 $ 28 $ — $ 306 Special mention — — — — — — — — Substandard — 2 — — — — — 2 Doubtful — — — — — — — — Total $ 12 $ 144 $ 82 $ 31 $ 11 $ 28 $ — $ 308 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 36 $ 244 $ 192 $ 96 $ 47 $ 91 $ — $ 706 Special mention — — 1 — 11 6 — 18 Substandard — 2 2 1 2 6 — 13 Doubtful — — — — — — — — Total $ 36 $ 246 $ 195 $ 97 $ 60 $ 103 $ — $ 737 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 73 $ 316 $ 247 $ 124 $ 74 $ 170 $ — $ 1,004 Special mention — 3 1 2 6 1 — 13 Substandard 1 3 2 1 3 16 — 26 Doubtful — — — — — — — — Total $ 74 $ 322 $ 250 $ 127 $ 83 $ 187 $ — $ 1,043 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Residential Risk rating: Pass $ 95 $ 479 $ 355 $ 181 $ 78 $ 268 $ 137 $ 1,593 Special mention — 1 3 2 — 4 1 11 Substandard 1 5 2 3 2 9 3 25 Doubtful — — — — — — — — Total $ 96 $ 485 $ 360 $ 186 $ 80 $ 281 $ 141 $ 1,629 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Auto Risk rating: Pass $ 51 $ 296 $ 116 $ 46 $ 20 $ 6 $ — $ 535 Special mention — — — — — — — — Substandard — 1 — 1 — — — 2 Doubtful — — — — — — — — Total $ 51 $ 297 $ 116 $ 47 $ 20 $ 6 $ — $ 537 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Non-Auto Risk rating: Pass $ 21 $ 74 $ 34 $ 7 $ 2 $ 2 $ 7 $ 147 Special mention — — — — — — — — Substandard — — 1 — — — — 1 Doubtful — — — — — — — — Total $ 21 $ 74 $ 35 $ 7 $ 2 $ 2 $ 7 $ 148 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ — March 31, 2023 2022 2021 2020 2019 Prior Revolving Total Total Loans Risk rating: Pass $ 573 $ 2,818 $ 1,306 $ 606 $ 266 $ 706 $ 144 $ 6,419 Special mention 4 17 6 6 19 11 1 64 Substandard 5 23 12 8 8 34 3 93 Doubtful — — — — — — — — Total $ 582 $ 2,858 $ 1,324 $ 620 $ 293 $ 751 $ 148 $ 6,576 Year-to-Date Gross Charge-Offs $ — $ — $ — $ — $ — $ — $ — $ —
Schedule of Internal Ratings of Loans	The following summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at March 31, 2022 (dollars in millions): March 31, 2022 2021 2020 2019 2018 Prior Revolving Total C&I Risk rating: Pass $ 163 $ 438 $ 121 $ 42 $ 24 $ 26 $ — $ 814 Special mention — 4 — 3 — — — 7 Substandard 3 7 3 2 2 — — 17 Doubtful — — — — — — — — Total $ 166 $ 449 $ 124 $ 47 $ 26 $ 26 $ — $ 838 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Municipal Risk rating: Pass $ 25 $ 33 $ 15 $ 5 $ 21 $ 93 $ — $ 192 Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total $ 25 $ 33 $ 15 $ 5 $ 21 $ 93 $ — $ 192 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Agricultural Risk rating: Pass $ 20 $ 47 $ 6 $ 4 $ 1 $ 1 $ — $ 79 Special mention — — — — — — — — Substandard — 4 — — — — — 4 Doubtful — — — — — — — — Total $ 20 $ 51 $ 6 $ 4 $ 1 $ 1 $ — $ 83 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Construction & Development Risk rating: Pass $ 118 $ 524 $ 106 $ 21 $ 13 $ 13 $ — $ 795 Special mention — 2 — — — — — 2 Substandard 1 6 1 1 — — — 9 Doubtful — — — — — — — — Total $ 119 $ 532 $ 107 $ 22 $ 13 $ 13 $ — $ 806 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Farm Risk rating: Pass $ 25 $ 110 $ 39 $ 13 $ 8 $ 28 $ — $ 223 Special mention — — — — — — — — Substandard — — 1 — 1 1 — 3 Doubtful — — — — — — — — Total $ 25 $ 110 $ 40 $ 13 $ 9 $ 29 $ — $ 226 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Owner Occupied CRE Risk rating: Pass $ 52 $ 211 $ 123 $ 62 $ 52 $ 101 $ — $ 601 Special mention — — 1 11 1 8 — 21 Substandard — — 5 3 1 5 — 14 Doubtful — — — — — — — Total $ 52 $ 211 $ 129 $ 76 $ 54 $ 114 $ — $ 636 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Owner Occupied CRE Risk rating: Pass $ 100 $ 258 $ 136 $ 97 $ 88 $ 166 $ — $ 845 Special mention — 1 2 1 — 1 — 5 Substandard 2 4 2 3 9 11 — 31 Doubtful — — — — — — — — Total $ 102 $ 263 $ 140 $ 101 $ 97 $ 178 $ — $ 881 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Residential Risk rating: Pass $ 107 $ 441 $ 208 $ 106 $ 78 $ 266 $ 109 $ 1,315 Special mention — 3 4 — 1 4 1 13 Substandard 1 4 3 2 2 11 1 24 Doubtful — — — — — — — — Total $ 108 $ 448 $ 215 $ 108 $ 81 $ 281 $ 111 $ 1,352 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Auto Risk rating: Pass $ 68 $ 197 $ 89 $ 44 $ 14 $ 6 $ — $ 418 Special mention — — — — — — — — Substandard — — 1 1 — — — 2 Doubtful — — — — — — — — Total $ 68 $ 197 $ 90 $ 45 $ 14 $ 6 $ — $ 420 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Non-Auto Risk rating: Pass $ 26 $ 68 $ 19 $ 6 $ 3 $ 2 $ 7 $ 131 Special mention — — — — — — — — Substandard — 1 — — — — — 1 Doubtful — — — — — — — — Total $ 26 $ 69 $ 19 $ 6 $ 3 $ 2 $ 7 $ 132 March 31, 2022 2021 2020 2019 2018 Prior Revolving Total Total Loans Risk rating: Pass $ 704 $ 2,327 $ 862 $ 400 $ 302 $ 702 $ 116 $ 5,413 Special mention — 10 7 15 2 13 1 48 Substandard 7 26 16 12 15 28 1 105 Doubtful — — — — — — — — Total $ 711 $ 2,363 $ 885 $ 427 $ 319 $ 743 $ 118 $ 5,566 The following summarizes the Company’s internal ratings of its loans held-for-investment, including the year of origination, by portfolio segments, at December 31, 2022 (dollars 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
Schedule of Past Due Loans	At March 31, 2023 and 2022, and December 31, 2022, the Company’s past due loans are as follows (dollars in thousands): March 31, 2023 15-59 60-89 Greater Total Past Current Total Loans 90 Days Commercial: C&I $ 3,952 $ 292 $ 1,825 $ 6,069 $ 948,617 $ 954,686 $ 14 Municipal 209 — — 209 221,170 221,379 — Total Commercial 4,161 292 1,825 6,278 1,169,787 1,176,065 14 Agricultural 816 25 24 865 76,152 77,017 — Real Estate: Construction & Development 7,058 332 — 7,390 913,800 921,190 — Farm 264 — 372 636 307,070 307,706 — Non-Owner Occupied CRE 3,183 — 695 3,878 733,239 737,117 — Owner Occupied CRE 3,886 — — 3,886 1,039,132 1,043,018 — Residential 7,484 744 767 8,995 1,619,846 1,628,841 Total Real Estate 21,875 1,076 1,834 24,785 4,613,087 4,637,872 — Consumer: Auto 683 41 9 733 536,677 537,410 8 Non-Auto 136 — — 136 147,715 147,851 — Total Consumer 819 41 9 869 684,392 685,261 8 Total $ 27,671 $ 1,434 $ 3,692 $ 32,797 $ 6,543,418 $ 6,576,215 $ 22 March 31, 2022 15-59 60-89 Greater Total Past Current Total Loans 90 Days Commercial: C&I $ 8,971 $ 36 $ 1,658 $ 10,665 $ 827,384 $ 838,049 $ — Municipal 153 — — 153 191,646 191,799 — Total Commercial 9,124 36 1,658 10,818 1,019,030 1,029,848 — Agricultural 4,846 — — 4,846 78,037 82,883 — Real Estate: Construction & Development 3,562 — 37 3,599 802,612 806,211 — Farm 7 — 445 452 225,490 225,942 — Non-Owner Occupied CRE 5,066 108 — 5,174 630,986 636,160 — Owner Occupied CRE 2,789 1,028 525 4,342 876,839 881,181 — Residential 6,757 224 250 7,231 1,344,931 1,352,162 — Total Real Estate 18,181 1,360 1,257 20,798 3,880,858 3,901,656 — Consumer: Auto 302 49 20 371 419,447 419,818 8 Non-Auto 125 — 3 128 131,836 131,964 3 Total Consumer 427 49 23 499 551,283 551,782 11 Total $ 32,578 $ 1,445 $ 2,938 $ 36,961 $ 5,529,208 $ 5,566,169 $ 11 December 31, 2022 15-59 60-89 Greater Total Past 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 $ — * 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.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions	The following tables provide the outstanding notional balances and fair values of outstanding derivative positions (dollars in thousands): March 31, 2023: Outstanding Asset Liability IRLCs $ 58,706 $ 827 $ — Forward mortgage-backed securities trades 69,500 — 334 March 31, 2022: Outstanding Asset Liability IRLCs $ 106,806 $ 276 $ — Forward mortgage-backed securities trades 115,000 2,103 — December 31, 2022: Outstanding Asset Liability IRLCs $ 41,664 $ 400 $ — Forward mortgage-backed securities trades 45,000 85 —

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Schedule of Borrowings	Borrowings consisted of the following (dollars in thousands): March 31, December 31, 2023 2022 2022 Securities sold under agreements with customers to repurchase $ 608,299 $ 716,717 $ 618,829 Federal funds purchased 3,575 20,825 2,625 Other borrowings 21,053 21,053 21,053 Total $ 632,927 $ 758,595 $ 642,507

Stock Based Compensation (Table

Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Changes in Restricted Stock Units	The following table summarizes information about the changes in restricted stock units for the three-months ended March 31, 2023 and 2022. For the Three-Months Ended March 31, 2023 2022 Restricted Weighted Restricted Weighted Balance at beginning of period 39,657 $ 47.83 22,597 $ 48.91 Grants — — — — Vesting — — — — Forfeited/expired ( 2,888 ) 47.87 — — Balance at end of period 36,769 $ 47.83 22,597 $ 48.91
Schedule of Changes in Performance Stock Units	The following table summarizes information about the changes in PSUs as of and for the three-months ended March 31, 2023 and 2022. For the Three-Months Ended March 31, 2023 2022 Performance-Based Restricted Weighted Performance-Based Restricted Weighted Balance at beginning of period 47,082 $ 48.00 22,597 $ 48.91 Grants — — — — Vesting — — — — Forfeited/expired ( 3,456 ) 48.04 — — Balance at end of period 43,626 $ 48.00 22,597 $ 48.91
Summary of Vested and Unvested Restricted Stock Outstanding	The following table summarizes information about vested and unvested restricted stock. For the Three-Months Ended March 31, 2023 2022 Restricted Weighted Restricted Weighted Balance at beginning of period 24,813 $ 36.21 46,598 $ 35.75 Grants — — 615 49.60 Vesting ( 2,872 ) 28.25 ( 3,161 ) 32.06 Forfeited/expired ( 1,105 ) 29.70 ( 200 ) 29.70 Balance at end of period 20,836 $ 37.53 43,852 $ 36.24
Schedule of Analysis of Stock Option Activity	An analysis of stock option activity for the three-months ended March 31, 2023 is presented in the table and narrative below:​​​​​​​ Shares Weighted- Outstanding, December 31, 2022 1,490,413 $ 29.99 Granted — — Exercised ( 47,620 ) 19.03 Cancelled ( 32,255 ) 43.69 Outstanding, March 31, 2023 1,410,538 30.05 Exercisable, March 31, 2023 722,398 $ 22.27

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	3 Months Ended
	Mar. 31, 2023
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, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands): March 31, 2023 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 488,242 $ — $ — $ 488,242 Obligations of state and political subdivisions — 1,773,612 — 1,773,612 Corporate bonds — 99,620 — 99,620 Residential mortgage-backed securities — 2,583,170 — 2,583,170 Commercial mortgage-backed securities — 349,936 — 349,936 Other securities 3,977 — — 3,977 Total $ 492,219 $ 4,806,338 $ — $ 5,298,557 Loans held-for-sale $ — $ 11,766 $ — $ 11,766 IRLCs $ — $ 827 $ — $ 827 Forward mortgage-backed securities trades $ — $ ( 334 ) $ — $ ( 334 ) March 31, 2022 Level 1 Level 2 Level 3 Total Fair Available-for-sale investment securities: U.S. Treasury securities $ 301,344 $ — $ — $ 301,344 Obligations of states and political subdivisions — 2,529,481 — 2,529,481 Corporate bonds — 64,581 — 64,581 Residential mortgage-backed securities — 3,265,191 — 3,265,191 Commercial mortgage-backed securities — 337,678 — 337,678 Other securities 4,220 — — 4,220 Total $ 305,564 $ 6,196,931 $ — $ 6,502,495 Loans held-for-sale $ — $ 22,382 $ — $ 22,382 IRLCs $ — $ 276 $ — $ 276 Forward mortgage-backed securities trades $ — $ 2,103 $ — $ 2,103 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 trades $ — $ 85 $ — $ 85
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 (dollars in thousands): March 31, December 31, 2023 2022 2022 Unpaid principal balance on loans held-for-sale $ 11,416 $ 22,233 $ 10,226 Net unrealized gains on loans held-for-sale 350 149 271 Loans held-for-sale at fair value $ 11,766 $ 22,382 $ 10,497
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 three-months ended March 31, 2023 and 2022 (dollars in thousand): Three-Months Ended 2023 2022 Realized gain on sale and fees on mortgage loans* $ 2,859 $ 5,998 Change in fair value on loans held-for-sale and IRLCs 534 ( 1,915 ) Change in forward mortgage-backed securities trades ( 419 ) 2,250 Total gain on sale of mortgage loans $ 2,974 $ 6,333
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 were as follows (dollars in thousands). March 31, December 31, 2023 2022 2022 Carrying Estimated Carrying Estimated Carrying Estimated Fair Value Cash and due from banks $ 224,875 $ 224,875 $ 203,187 $ 203,187 $ 293,286 $ 293,286 Level 1 Interest-bearing demand deposits 221,336 221,336 394,566 394,566 37,392 37,392 Level 1 Available-for-sale securities 5,298,557 5,298,557 6,502,495 6,502,495 5,474,359 5,474,359 Levels 1 Loans held-for-investment, net of 6,495,397 6,464,027 5,499,256 5,522,778 6,366,034 6,372,859 Level 3 Loans held-for-sale 11,996 12,018 27,670 26,985 11,965 11,965 Level 2 Accrued interest receivable 50,658 50,658 48,066 48,066 58,162 58,162 Level 2 Deposits with stated maturities 739,498 736,434 449,130 449,987 524,666 518,811 Level 2 Deposits with no stated maturities 10,196,920 10,196,920 10,550,695 10,550,695 10,480,841 10,480,841 Level 1 Borrowings 632,927 632,927 758,595 758,595 642,507 642,507 Level 2 Accrued interest payable 3,617 3,617 268 268 1,121 1,121 Level 2 IRLCs 827 827 276 276 400 400 Level 2 Forward mortgage-backed securities ( 334 ) ( 334 ) 2,103 2,103 85 85 Level 2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		7 Months Ended
	Mar. 31, 2023 USD ($) Location $ / shares shares	Mar. 31, 2022 USD ($) shares	Jul. 27, 2021 shares	Dec. 31, 2022 USD ($)
Equity, Class of Treasury Stock [Line Items]
Number of locations | Location	79
Minimum number of shares that company is required to repurchase | shares			0
Amount of allowance for credit loss	$ 0	$ 0		$ 0
Shares repurchased and retired average price | $ / shares	$ 38.61
Minimum number of days to consider the loans as non-accrual	90 days
Impairment recorded	$ 0	0
Other identifiable intangible assets, amortized period (years)	7 years
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 losses in available-for-sale securities, included in accumulated other comprehensive income	$ (458,249,000)	(209,582,000)		(535,228,000)
Retained earnings net of tax after transitional charges	$ 1,150,246,000	$ 1,016,239,000		1,121,945,000
First financial antidilutive securities excluded from eps computation | shares	480,000	212,000
Shares repurchased under stock repurchase authorization, shares | shares	244,559
Deferred Tax Assets	$ 122,947,000,000	$ 57,278,000,000		145,511,000,000
Commitments to Extend Credit [Member]
Equity, Class of Treasury Stock [Line Items]
Reserve for unfunded commitments	10,397,000	7,471,000		12,323,000
Held-to-maturity Securities [Member]
Equity, Class of Treasury Stock [Line Items]
Securities held to maturity	$ 0	$ 0		$ 0
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased | shares			5,000,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 52,568	$ 55,972
Effect of stock options and stock grants, Net Earnings	0	0
Net earnings per share, diluted, Net Earnings	$ 52,568	$ 55,972
Net earnings per share, basic, Weighted Average Shares	142,665,646	142,558,743
Effect of stock options and stock grants, Weighted Average Shares	400,365	743,320
Net earnings per share, diluted, Weighted Average Shares	143,066,011	143,302,063
Net earnings per share, basic, Per Share Amount	$ 0.37	$ 0.39
Effect of stock options and stock grants, Per Share Amount	0	0
Net earnings per share, diluted, Per Share Amount	$ 0.37	$ 0.39

Securities - Additional Informa

Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2023 USD ($) Investment	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Interest Bearing Time Deposits In Banks And Securities [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	$ 0	$ 0	$ 0
Interest-bearing time deposits, maturity period, years	12 months
Number of investment positions | Investment	897
Securities pledged as collateral	$ 3,291,020,000
Sales of investment securities available-for-sale	145,948,000	0
Gross realized gains from security sales	1,052,000	33,000
Gross realized losses from security sales or calls	$ 1,040,000	$ 2,000
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	52.94%
Obligations of State and Political Subdivisions [Member] | Texas [Member] | Available-for-Sale Securities [Member] | Geographic Concentration Risk [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Concentration risk, percentage	70.30%

Securities - Summary of Availab

Securities - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	$ 5,879,040	$ 6,152,348	$ 6,767,967
Securities available-for-sale, Gross Unrealized Holding Gains	1,611	1,237	29,691
Securities available-for-sale, Gross Unrealized Holding Losses	(582,094)	(679,226)	(295,163)
Securities available-for-sale, Estimated Fair Value	5,298,557	5,474,359	6,502,495
U.S. Treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	508,692	508,275	311,860
Securities available-for-sale, Gross Unrealized Holding Gains	32	11	0
Securities available-for-sale, Gross Unrealized Holding Losses	(20,482)	(25,737)	(10,516)
Securities available-for-sale, Estimated Fair Value	488,242	482,549	301,344
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	1,935,401	2,104,193	2,590,308
Securities available-for-sale, Gross Unrealized Holding Gains	1,562	1,217	26,628
Securities available-for-sale, Gross Unrealized Holding Losses	(163,351)	(206,799)	(87,455)
Securities available-for-sale, Estimated Fair Value	1,773,612	1,898,611	2,529,481
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	2,957,314	3,034,120	3,450,006
Securities available-for-sale, Gross Unrealized Holding Gains	17	8	2,139
Securities available-for-sale, Gross Unrealized Holding Losses	(374,161)	(417,562)	(186,954)
Securities available-for-sale, Estimated Fair Value	2,583,170	2,616,566	3,265,191
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	364,956	392,914	341,506
Securities available-for-sale, Gross Unrealized Holding Gains	0	1	924
Securities available-for-sale, Gross Unrealized Holding Losses	(15,020)	(18,046)	(4,752)
Securities available-for-sale, Estimated Fair Value	349,936	374,869	337,678
Corporate Bonds and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	112,677	112,846	74,287
Securities available-for-sale, Gross Unrealized Holding Gains	0	0	0
Securities available-for-sale, Gross Unrealized Holding Losses	(9,080)	(11,082)	(5,486)
Securities available-for-sale, Estimated Fair Value	$ 103,597	$ 101,764	$ 68,801

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Available-for-Sale, Amortized Cost Basis, Due within one year	$ 267,375
Available-for-Sale, Amortized Cost Basis, Due after one year through five years	1,499,938
Available-for-Sale, Amortized Cost Basis, Due after five years through ten years	3,126,228
Available-for-Sale, Amortized Cost Basis, Due after ten years	985,499
Available-for-Sale, Amortized Cost Basis, Total	5,879,040	$ 6,152,348	$ 6,767,967
Available-for-Sale, Estimated Fair Value, Due within one year	264,338
Available-for-Sale, Estimated Fair Value, Due after one year through five years	1,420,069
Available-for-Sale, Estimated Fair Value, Due after five years through ten years	2,771,041
Available-for-Sale, Estimated Fair Value, Due after ten years	843,109
Securities available-for-sale, Estimated Fair Value, Total	$ 5,298,557	$ 5,474,359	$ 6,502,495

Securities - Continuous Unreali

Securities - Continuous Unrealized-Loss Position of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 616,799	$ 1,909,674	$ 4,789,430
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	13,693	118,033	265,748
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	4,499,790	3,378,251	357,123
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	568,401	561,193	29,415
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	5,116,589	5,287,925	5,146,553
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	582,094	679,226	295,163
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	191,725	307,012	301,344
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	4,193	11,650	10,516
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	292,587	173,105	0
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	16,289	14,087	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	484,312	480,117	301,344
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	20,482	25,737	10,516
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	126,532	770,469	1,518,732
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	1,448	55,943	85,015
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	1,470,950	946,571	25,679
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	161,903	150,856	2,440
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	1,597,482	1,717,040	1,544,411
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	163,351	206,799	87,455
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	91,738	470,970	2,725,934
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	2,937	37,065	163,034
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	2,489,524	2,143,869	303,344
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	371,224	380,497	23,920
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	2,581,262	2,614,839	3,029,278
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	374,161	417,562	186,954
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	164,301	319,303	202,719
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	3,948	11,677	4,752
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	185,635	54,862	0
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	11,072	6,369	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	349,936	374,165	202,719
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	15,020	18,046	4,752
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	42,503	41,920	40,701
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	1,167	1,698	2,431
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	61,094	59,844	28,100
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	7,913	9,384	3,055
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	103,597	101,764	68,801
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	$ 9,080	$ 11,082	$ 5,486

Loans Held for Investment and_3

Loans Held for Investment and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 16,845	$ 14,541	$ 18,744
Loans collectively evaluated for credit losses	63,973	61,293	48,169
Total allowance for loan losses	80,818	75,834	66,913	$ 63,465
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	7,523	8,398	7,793
Loans collectively evaluated for credit losses	8,560	7,731	7,944
Total allowance for loan losses	16,083	16,129	15,737	12,280
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for credit losses	1,067	1,026	1,418
Total allowance for loan losses	1,067	1,026	1,418	348
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,397	305	1,490
Loans collectively evaluated for credit losses	26,230	26,138	16,397
Total allowance for loan losses	28,627	26,443	17,887	17,627
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses		36	0
Loans collectively evaluated for credit losses	1,937	1,921	873
Total allowance for loan losses	1,937	1,957	873	663
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,081	2,357	3,016
Loans collectively evaluated for credit losses	6,970	6,718	5,483
Total allowance for loan losses	9,051	9,075	8,499	10,722
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,605	1,600	3,245
Loans collectively evaluated for credit losses	9,343	8,328	8,291
Total allowance for loan losses	11,948	9,928	11,536	10,828
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,663	1,444	1,974
Loans collectively evaluated for credit losses	8,039	7,631	5,855
Total allowance for loan losses	9,702	9,075	7,829	8,133
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	3	2	3
Loans collectively evaluated for credit losses	854	843	866
Total allowance for loan losses	857	845	869	896
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2	1	1
Loans collectively evaluated for credit losses	330	314	353
Total allowance for loan losses	332	315	354	371
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	571	398	1,222
Loans collectively evaluated for credit losses	643	643	689
Total allowance for loan losses	$ 1,214	$ 1,041	$ 1,911	$ 1,597

Loans Held for Investment and_4

Loans Held for Investment and Allowance for Loan Losses - Loans Held-for-Investment by Class of Financing Receivables (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022		Mar. 31, 2022		Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 6,576,215	$ 6,441,868		$ 5,566,169
Total Real Estate	24,171	24,325		28,743
Less: Allowance for credit losses	(80,818)	(75,834)		(66,913)		$ (63,465)
Net loans held for investment	6,495,397	6,366,034		5,499,256
C&I [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	954,686	917,317		838,049
Less: Allowance for credit losses	(16,083)	(16,129)		(15,737)		(12,280)
Municipal [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	221,379	221,090		191,799
Less: Allowance for credit losses	(1,067)	(1,026)		(1,418)		(348)
Construction & Development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	921,190	959,426		806,211
Less: Allowance for credit losses	(28,627)	(26,443)		(17,887)		(17,627)
Farm [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	307,706	306,322		225,942
Less: Allowance for credit losses	(1,937)	(1,957)		(873)		(663)
Non-Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	737,117	732,089		636,160
Less: Allowance for credit losses	(9,051)	(9,075)		(8,499)		(10,722)
Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,043,018	954,400		881,181
Less: Allowance for credit losses	(11,948)	(9,928)		(11,536)		(10,828)
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,628,841	1,575,758		1,352,162
Less: Allowance for credit losses	(9,702)	(9,075)		(7,829)		(8,133)
Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	537,410	550,635		419,818
Less: Allowance for credit losses	(857)	(845)		(869)		(896)
Non-Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	147,851	147,884		131,964
Less: Allowance for credit losses	(332)	(315)		(354)		(371)
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,176,065	1,138,407		1,029,848
Commercial [Member] | C&I [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	954,686	917,317	[1]	838,049	[1]
Commercial [Member] | Municipal [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	221,379	221,090		191,799
Agriculture [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	77,017	76,947		82,883
Less: Allowance for credit losses	(1,214)	(1,041)		(1,911)		$ (1,597)
Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	4,637,872	4,527,995		3,901,656
Real Estate [Member] | Construction & Development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	921,190	959,426		806,211
Real Estate [Member] | Farm [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	307,706	306,322		225,942
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	737,117	732,089		636,160
Real Estate [Member] | Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,043,018	954,400		881,181
Real Estate [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,628,841	1,575,758		1,352,162
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	685,261	698,519		551,782
Consumer [Member] | Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	537,410	550,635		419,818
Consumer [Member] | Non-Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 147,851	$ 147,884		$ 131,964
[1] All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees and costs, as disclosed on the face of the consolidated balance sheet.

Loans Held for Investment and_5

Loans Held for Investment and Allowance for Loan Losses - Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Receivables [Abstract]
Non-accrual loans	$ 24,171	$ 24,325	$ 28,743
Loans still accruing and past due 90 days or more	22	0	11
Total	$ 24,193	$ 24,325	$ 28,754

Loans Held for Investment and_6

Loans Held for Investment and Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets	$ 24,389,000	$ 28,754,000	$ 24,325,000
Additional funds advanced in connection with impaired loans	0
Loans held by subsidiaries subject to blanket liens	4,230,606,000
Available line of credit	2,396,844,000
Line of credit	0	0	0
Reserve for unfunded commitments (Other liabilities)	10,397,000	7,471,000	12,323,000
Total Loans	6,576,215,000	5,566,169,000	$ 6,441,868,000
Provision for Loan and Lease Losses	4,707,000	3,747,000
Federal Home Loan Bank Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Line of credit	0
Unfunded Loan Commitment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	1,926,000	1,035,000
Reversal of Provision for credit losses	$ 2,781,000	$ 4,782,000

Loans Held for Investment and_7

Loans Held for Investment and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 24,171	$ 24,325	$ 28,743
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	5,343	5,057	4,711
Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	5,343	5,057	4,711
Commercial [Member] | Muncipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0	0	0
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	161	324	4,338
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	18,187	18,484	19,252
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	773	1,567	594
Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	452	85	1,209
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,907	2,321	2,574
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	6,823	7,092	7,288
Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	7,232	7,419	7,587
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	480	460	442
Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	398	429	402
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 82	$ 31	$ 40

Loans Held for Investment and_8

Loans Held for Investment and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 75,834,000	$ 63,465,000
Provision for Loan and Lease Losses	4,707,000	3,747,000
Recoveries	565,000	360,000
Charge-offs	(288,000)	(659,000)
Ending balance	80,818,000	66,913,000
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	16,129,000	12,280,000
Provision for Loan and Lease Losses	(64,000)	3,455,000
Recoveries	52,000	156,000
Charge-offs	(34,000)	(154,000)
Ending balance	16,083,000	15,737,000
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,026,000	348,000
Provision for Loan and Lease Losses	41,000	1,070,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	1,067,000	1,418,000
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	26,443,000	17,627,000
Provision for Loan and Lease Losses	2,084,000	360,000
Recoveries	100,000	0
Charge-offs	0	(100,000)
Ending balance	28,627,000	17,887,000
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,957,000	663,000
Provision for Loan and Lease Losses	20,000	210,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	1,937,000	873,000
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	9,075,000	10,722,000
Provision for Loan and Lease Losses	(49,000)	(2,278,000)
Recoveries	25,000	55,000
Charge-offs	0	0
Ending balance	9,051,000	8,499,000
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	9,928,000	10,828,000
Provision for Loan and Lease Losses	2,013,000	789,000
Recoveries	7,000	7,000
Charge-offs	0	(88,000)
Ending balance	11,948,000	11,536,000
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	9,075,000	8,133,000
Provision for Loan and Lease Losses	624,000	(163,000)
Recoveries	3,000	5,000
Charge-offs	0	(146,000)
Ending balance	9,702,000	7,829,000
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	845,000	896,000
Provision for Loan and Lease Losses	70,000	(20,000)
Recoveries	132,000	66,000
Charge-offs	(190,000)	(73,000)
Ending balance	857,000	869,000
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	315,000	371,000
Provision for Loan and Lease Losses	36,000	35,000
Recoveries	45,000	46,000
Charge-offs	(64,000)	(98,000)
Ending balance	332,000	354,000
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,041,000	1,597,000
Provision for Loan and Lease Losses	28,000	289,000
Recoveries	201,000	25,000
Charge-offs	0	0
Ending balance	$ 1,214,000	$ 1,911,000

Loans Held for Investment and_9

Loans Held for Investment and Allowance for Loan Losses - Schedule of loans that are individually evaluated for credit losses (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Impaired [Line Items]
Related Allowance	$ 16,845	$ 14,541	$ 18,744
Total Recorded Investment	157,056	150,698	152,160
Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	11,867	12,250	17,257
Recorded Investment With Allowance	12,304	12,075	11,486
Related Allowance	4,434	4,167	3,928
Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	12,411	10,374	14,816
Total Recorded Investment	132,885	126,373	123,417
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	7,523	8,398	7,793
Total Recorded Investment	26,391	29,440	25,427
Commercial [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		0	95
Recorded Investment With Allowance	5,343	5,057	4,616
Related Allowance	3,582	3,513	2,525
Commercial [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	3,941	4,885	5,268
Total Recorded Investment	21,048	24,383	20,716
Commercial [Member] | C&I [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	7,523	8,398	7,793
Total Recorded Investment	25,484	29,382	25,331
Commercial [Member] | C&I [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		0	95
Recorded Investment With Allowance	5,343	5,057	4,616
Related Allowance	3,582	3,513	2,525
Commercial [Member] | C&I [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	3,941	4,885	5,268
Total Recorded Investment	20,141	24,325	20,620
Commercial [Member] | Municipal [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment	907	58	96
Commercial [Member] | Municipal [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment	907	58	96
Commercial [Member] | Farm [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance		2
Agriculture [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	571	398	1,222
Total Recorded Investment	1,073	679	4,749
Agriculture [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance		116	2,349
Recorded Investment With Allowance	161	209	1,989
Related Allowance	86	122	946
Agriculture [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	485	276	276
Total Recorded Investment	912	354	411
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	8,746	5,742	9,725
Total Recorded Investment	127,230	118,650	120,100
Real Estate [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	11,867	12,134	14,813
Recorded Investment With Allowance	6,320	6,349	4,439
Related Allowance	765	531	456
Real Estate [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	7,981	5,211	9,269
Total Recorded Investment	109,043	100,167	100,848
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,397	305	1,490
Total Recorded Investment	19,586	6,440	10,226
Real Estate [Member] | Construction & Development [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	397	577	0
Recorded Investment With Allowance	376	990	594
Related Allowance	57	193	44
Real Estate [Member] | Construction & Development [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,340	112	1,446
Total Recorded Investment	18,813	4,873	9,632
Real Estate [Member] | Farm [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance		36	0
Total Recorded Investment	1,684	1,663	2,423
Real Estate [Member] | Farm [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	452	0	1,209
Recorded Investment With Allowance		85	0
Related Allowance			0
Real Estate [Member] | Farm [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance		34	0
Total Recorded Investment	1,232	1,578	1,214
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,081	2,357	3,016
Total Recorded Investment	31,464	38,358	35,279
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	2,136	2,062	2,463
Recorded Investment With Allowance	771	259	111
Related Allowance	152	16	10
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,929	2,341	3,006
Total Recorded Investment	28,557	36,037	32,705
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,605	1,600	3,245
Total Recorded Investment	38,801	36,206	36,896
Real Estate [Member] | Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	4,111	4,363	6,187
Recorded Investment With Allowance	2,712	2,728	1,101
Related Allowance	297	91	96
Real Estate [Member] | Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,308	1,509	3,149
Total Recorded Investment	31,978	29,115	29,608
Real Estate [Member] | Residential [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,663	1,444	1,974
Total Recorded Investment	35,695	35,983	35,276
Real Estate [Member] | Residential [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	4,771	5,132	4,954
Recorded Investment With Allowance	2,461	2,287	2,633
Related Allowance	259	229	306
Real Estate [Member] | Residential [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,404	1,215	1,668
Total Recorded Investment	28,463	28,564	27,689
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	5	3	4
Total Recorded Investment	2,362	1,929	1,884
Consumer [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With Allowance	480	460	442
Related Allowance	1	1	1
Consumer [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	4	2	3
Total Recorded Investment	1,882	1,469	1,442
Consumer [Member] | Auto [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	3	2	3
Total Recorded Investment	1,648	1,360	1,494
Consumer [Member] | Auto [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With Allowance	398	429	402
Related Allowance	1	1	1
Consumer [Member] | Auto [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2	1	2
Total Recorded Investment	1,250	931	1,092
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2	1	1
Total Recorded Investment	714	569	390
Consumer [Member] | Non-Auto [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With Allowance	82	31	40
Consumer [Member] | Non-Auto [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2	1	1
Total Recorded Investment	$ 632	$ 538	$ 350

Loans Held for Investment an_10

Loans Held for Investment and Allowance for Loan 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	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 157,056	$ 150,698	$ 152,160
Loans collectively evaluated for credit losses	6,419,159	6,291,170	5,414,009
Total Loans	6,576,215	6,441,868	5,566,169
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	25,484	29,382	25,331
Loans collectively evaluated for credit losses	929,202	887,935	812,718
Total Loans	954,686	917,317	838,049
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	907	58	96
Loans collectively evaluated for credit losses	220,472	221,032	191,703
Total Loans	221,379	221,090	191,799
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	19,586	6,440	10,226
Loans collectively evaluated for credit losses	901,604	952,986	795,985
Total Loans	921,190	959,426	806,211
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,684	1,663	2,423
Loans collectively evaluated for credit losses	306,022	304,659	223,519
Total Loans	307,706	306,322	225,942
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	31,464	38,358	35,279
Loans collectively evaluated for credit losses	705,653	693,731	600,881
Total Loans	737,117	732,089	636,160
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	38,801	36,206	36,896
Loans collectively evaluated for credit losses	1,004,217	918,194	844,285
Total Loans	1,043,018	954,400	881,181
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	35,695	35,983	35,276
Loans collectively evaluated for credit losses	1,593,146	1,539,775	1,316,886
Total Loans	1,628,841	1,575,758	1,352,162
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,648	1,360	1,494
Loans collectively evaluated for credit losses	535,762	549,275	418,324
Total Loans	537,410	550,635	419,818
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	714	569	390
Loans collectively evaluated for credit losses	147,137	147,315	131,574
Total Loans	147,851	147,884	131,964
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,073	679	4,749
Loans collectively evaluated for credit losses	75,944	76,268	78,134
Total Loans	77,017	76,947	82,883
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	4,637,872	4,527,995	3,901,656
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	921,190	959,426	806,211
Real Estate [Member] | Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	307,706	306,322	225,942
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	737,117	732,089	636,160
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	1,043,018	954,400	881,181
Real Estate [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	1,628,841	1,575,758	1,352,162
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	685,261	698,519	551,782
Consumer [Member] | Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	537,410	550,635	419,818
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	$ 147,851	$ 147,884	$ 131,964

Loans Held-for-Investment and A

Loans Held-for-Investment and Allowance for Loan Losses - Schedule of Company's Internal Ratings of its Loans Held-for-Investment, Including The Year of Origination, by Portfolio Segments (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 582,000	$ 3,094,000	$ 711,000
2022	2,858,000	1,449,000	2,363,000
2021	1,324,000	650,000	885,000
2020	620,000	312,000	427,000
2019	293,000	220,000	319,000
Prior	751,000	567,000	743,000
Revolving Loans Amortized Cost Basis	148,000	150,000	118,000
Total	6,576,000	6,442,000	5,566,000
C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	157,000	644,000	166,000
2022	557,000	163,000	449,000
2021	137,000	56,000	124,000
2020	52,000	24,000	47,000
2019	21,000	17,000	26,000
Prior	31,000	13,000	26,000
Total	955,000	917,000	838,000
Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,000	79,000	25,000
2022	82,000	19,000	33,000
2021	19,000	15,000	15,000
2020	15,000	4,000	5,000
2019	3,000	20,000	21,000
Prior	99,000	84,000	93,000
Total	221,000	221,000	192,000
Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	16,000	60,000	20,000
2022	52,000	10,000	51,000
2021	5,000	3,000	6,000
2020	2,000	2,000	4,000
2019	1,000	1,000	1,000
Prior	1,000	1,000	1,000
Total	77,000	77,000	83,000
Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	116,000	643,000	119,000
2022	599,000	219,000	532,000
2021	125,000	70,000	107,000
2020	56,000	13,000	22,000
2019	12,000	8,000	13,000
Prior	13,000	7,000	13,000
Total	921,000	960,000	806,000
Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	12,000	148,000	25,000
2022	144,000	85,000	110,000
2021	82,000	32,000	40,000
2020	31,000	11,000	13,000
2019	11,000	8,000	9,000
Prior	28,000	22,000	29,000
Total	308,000	306,000	226,000
Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	36,000	266,000	52,000
2022	246,000	193,000	211,000
2021	195,000	102,000	129,000
2020	97,000	62,000	76,000
2019	60,000	22,000	54,000
Prior	103,000	87,000	114,000
Revolving Loans Amortized Cost Basis	0
Total	737,000	732,000	636,000
Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	74,000	318,000	102,000
2022	322,000	226,000	263,000
2021	250,000	130,000	140,000
2020	127,000	84,000	101,000
2019	83,000	72,000	97,000
Prior	187,000	124,000	178,000
Revolving Loans Amortized Cost Basis	0
Total	1,043,000	954,000	881,000
Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	96,000	520,000	108,000
2022	485,000	361,000	448,000
2021	360,000	177,000	215,000
2020	186,000	84,000	108,000
2019	80,000	65,000	81,000
Prior	281,000	226,000	281,000
Revolving Loans Amortized Cost Basis	141,000	143,000	111,000
Total	1,629,000	1,576,000	1,352,000
Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	51,000	331,000	68,000
2022	297,000	131,000	197,000
2021	116,000	56,000	90,000
2020	47,000	25,000	45,000
2019	20,000	6,000	14,000
Prior	6,000	2,000	6,000
Revolving Loans Amortized Cost Basis	0
Total	537,000	551,000	420,000
Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	21,000	85,000	26,000
2022	74,000	42,000	69,000
2021	35,000	9,000	19,000
2020	7,000	3,000	6,000
2019	2,000	1,000	3,000
Prior	2,000	1,000	2,000
Revolving Loans Amortized Cost Basis	7,000	7,000	7,000
Total	148,000	148,000	132,000
Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	573,000	3,054,000	704,000
2022	2,818,000	1,430,000	2,327,000
2021	1,306,000	637,000	862,000
2020	606,000	285,000	400,000
2019	266,000	208,000	302,000
Prior	706,000	531,000	702,000
Revolving Loans Amortized Cost Basis	144,000	146,000	116,000
Total	6,419,000	6,291,000	5,413,000
Pass [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	155,000	627,000	163,000
2022	548,000	157,000	438,000
2021	132,000	52,000	121,000
2020	48,000	22,000	42,000
2019	19,000	16,000	24,000
Prior	28,000	13,000	26,000
Total	930,000	887,000	814,000
Pass [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,000	79,000	25,000
2022	82,000	19,000	33,000
2021	19,000	15,000	15,000
2020	15,000	4,000	5,000
2019	2,000	20,000	21,000
Prior	99,000	84,000	93,000
Total	220,000	221,000	192,000
Pass [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	16,000	60,000	20,000
2022	51,000	9,000	47,000
2021	5,000	3,000	6,000
2020	2,000	2,000	4,000
2019	1,000	1,000	1,000
Prior	1,000	1,000	1,000
Total	76,000	76,000	79,000
Pass [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	111,000	638,000	118,000
2022	586,000	218,000	524,000
2021	124,000	70,000	106,000
2020	56,000	13,000	21,000
2019	12,000	8,000	13,000
Prior	13,000	7,000	13,000
Total	902,000	954,000	795,000
Pass [Member] | Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	12,000	147,000	25,000
2022	142,000	85,000	110,000
2021	82,000	32,000	39,000
2020	31,000	11,000	13,000
2019	11,000	8,000	8,000
Prior	28,000	21,000	28,000
Total	306,000	304,000	223,000
Pass [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	36,000	258,000	52,000
2022	244,000	191,000	211,000
2021	192,000	100,000	123,000
2020	96,000	49,000	62,000
2019	47,000	21,000	52,000
Prior	91,000	75,000	101,000
Revolving Loans Amortized Cost Basis	0
Total	706,000	694,000	601,000
Pass [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	73,000	316,000	100,000
2022	316,000	224,000	258,000
2021	247,000	128,000	136,000
2020	124,000	74,000	97,000
2019	74,000	63,000	88,000
Prior	170,000	113,000	166,000
Revolving Loans Amortized Cost Basis	0
Total	1,004,000	918,000	845,000
Pass [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	95,000	513,000	107,000
2022	479,000	355,000	441,000
2021	355,000	173,000	208,000
2020	181,000	82,000	106,000
2019	78,000	64,000	78,000
Prior	268,000	214,000	266,000
Revolving Loans Amortized Cost Basis	137,000	139,000	109,000
Total	1,593,000	1,540,000	1,315,000
Pass [Member] | Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	51,000	331,000	68,000
2022	296,000	131,000	197,000
2021	116,000	55,000	89,000
2020	46,000	25,000	44,000
2019	20,000	6,000	14,000
Prior	6,000	2,000	6,000
Revolving Loans Amortized Cost Basis	0
Total	535,000	550,000	418,000
Pass [Member] | Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	21,000	85,000	26,000
2022	74,000	41,000	68,000
2021	34,000	9,000	19,000
2020	7,000	3,000	6,000
2019	2,000	1,000	3,000
Prior	2,000	1,000	2,000
Revolving Loans Amortized Cost Basis	7,000	7,000	7,000
Total	147,000	147,000	131,000
Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	4,000	7,000	0
2022	17,000	5,000	10,000
2021	6,000	6,000	7,000
2020	6,000	20,000	15,000
2019	19,000	0	2,000
Prior	11,000	11,000	13,000
Revolving Loans Amortized Cost Basis	1,000	1,000
Total	64,000	50,000	48,000
Special Mention [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,000	4,000
2022	3,000	1,000	4,000
2021	1,000	2,000
2020	2,000	1,000	3,000
2019	1,000
Total	8,000	8,000	7,000
Special Mention [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	1,000
Total	1,000
Special Mention [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,000
Total	1,000
Special Mention [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,000	1,000
2022	9,000		2,000
Total	12,000	1,000	2,000
Special Mention [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0	1,000
2021	1,000	1,000	1,000
2020	0	11,000	11,000
2019	11,000		1,000
Prior	6,000	7,000	8,000
Revolving Loans Amortized Cost Basis	0
Total	18,000	20,000	21,000
Special Mention [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		1,000
2022	3,000	0	1,000
2021	1,000	1,000	2,000
2020	2,000	8,000	1,000
2019	6,000
Prior	1,000	1,000	1,000
Revolving Loans Amortized Cost Basis	0
Total	13,000	11,000	5,000
Special Mention [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		1,000
2022	1,000	3,000	3,000
2021	3,000	2,000	4,000
2020	2,000
2019	0	0	1,000
Prior	4,000	3,000	4,000
Revolving Loans Amortized Cost Basis	1,000	1,000	1
Total	11,000	10,000	13,000
Special Mention [Member] | Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Total	0
Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	5,000	33,000	7,000
2022	23,000	14,000	26,000
2021	12,000	7,000	16,000
2020	8,000	7,000	12,000
2019	8,000	12,000	15,000
Prior	34,000	25,000	28,000
Revolving Loans Amortized Cost Basis	3,000	3,000	1,000
Total	93,000	101,000	105,000
Substandard [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,000	13,000	3,000
2022	6,000	5,000	7,000
2021	4,000	2,000	3,000
2020	2,000	1,000	2,000
2019	1,000	1,000	2,000
Prior	3,000
Total	17,000	22,000	17,000
Substandard [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,000	4,000
Total		1,000	4,000
Substandard [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,000	4,000	1,000
2022	4,000	1,000	6,000
2021	1,000		1,000
2020			1,000
Total	7,000	5,000	9,000
Substandard [Member] | Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		1,000
2022	2,000		0
2021			1,000
2019			1,000
Prior		1	1,000
Total	2,000	2,000	3,000
Substandard [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		8,000
2022	2,000	1,000
2021	2,000	1,000	5,000
2020	1,000	2,000	3,000
2019	2,000	1,000	1,000
Prior	6,000	5,000	5,000
Revolving Loans Amortized Cost Basis	0
Total	13,000	18,000	14,000
Substandard [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,000	1,000	2,000
2022	3,000	2,000	4,000
2021	2,000	1,000	2,000
2020	1,000	2,000	3,000
2019	3,000	9,000	9,000
Prior	16,000	10,000	11,000
Revolving Loans Amortized Cost Basis	0
Total	26,000	25,000	31,000
Substandard [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,000	6,000	1,000
2022	5,000	3,000	4,000
2021	2,000	2,000	3,000
2020	3,000	2,000	2,000
2019	2,000	1,000	2,000
Prior	9,000	9,000	11,000
Revolving Loans Amortized Cost Basis	3,000	3,000	1,000
Total	25,000	26,000	24,000
Substandard [Member] | Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	1,000
2021	0	1,000	1,000
2020	1,000		1,000
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Total	2,000	1,000	2,000
Substandard [Member] | Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,000	1,000
2021	1,000
Total	$ 1,000	$ 1,000	$ 1,000

Loans Held for Investment an_11

Loans Held for Investment and Allowance for Loan Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022		Mar. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 6,576,000	$ 6,442,000		$ 5,566,000
Total Loans		6,576,215	6,441,868		5,566,169
Total 90 Days Past Due Still Accruing		22	0		11
C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		955,000	917,000		838,000
Total Loans		954,686	917,317		838,049
Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		221,000	221,000		192,000
Total Loans		221,379	221,090		191,799
Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		921,000	960,000		806,000
Total Loans		921,190	959,426		806,211
Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		308,000	306,000		226,000
Total Loans		307,706	306,322		225,942
Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		737,000	732,000		636,000
Total Loans		737,117	732,089		636,160
Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,043,000	954,000		881,000
Total Loans		1,043,018	954,400		881,181
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,629,000	1,576,000		1,352,000
Total Loans		1,628,841	1,575,758		1,352,162
Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		537,000	551,000		420,000
Total Loans		537,410	550,635		419,818
Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		148,000	148,000		132,000
Total Loans		147,851	147,884		131,964
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,176,065	1,138,407		1,029,848
Total 90 Days Past Due Still Accruing		14
Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		954,686	917,317	[1]	838,049	[1]
Total 90 Days Past Due Still Accruing		14
Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		221,379	221,090		191,799
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		77,017	76,947		82,883
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		4,637,872	4,527,995		3,901,656
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		921,190	959,426		806,211
Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		307,706	306,322		225,942
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		737,117	732,089		636,160
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,043,018	954,400		881,181
Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,628,841	1,575,758		1,352,162
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		685,261	698,519		551,782
Total 90 Days Past Due Still Accruing		8			11
Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		537,410	550,635		419,818
Total 90 Days Past Due Still Accruing		8			8
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		147,851	147,884		131,964
Total 90 Days Past Due Still Accruing					3
15-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	27,671	20,806		32,578
15-59 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	4,161	4,000		9,124
15-59 Days Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	3,952	3,924		8,971
15-59 Days Past Due [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	209	76		153
15-59 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	816	243		4,846
15-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	21,875	15,734		18,181
15-59 Days Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	7,058	3,751		3,562
15-59 Days Past Due [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	264	668		7
15-59 Days Past Due [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	3,183	1,444		5,066
15-59 Days Past Due [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	3,886	1,151		2,789
15-59 Days Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	7,484	8,720		6,757
15-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	819	829		427
15-59 Days Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	683	779		302
15-59 Days Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	136	50		125
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,434	1,977		1,445
60-89 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		292	1,080		36
60-89 Days Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		292	297		36
60-89 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		25
60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,076	867		1,360
60-89 Days Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		332
60-89 Days Past Due [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due			0		1,028
60-89 Days Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		744	707		224
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		41	30		49
60-89 Days Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		41	30		49
60-89 Days Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due			0
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,692	2,087		2,938
Greater than 90 Days [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,825	1,646		1,658
Greater than 90 Days [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,825	1,646		1,658
Greater than 90 Days [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		24
Greater than 90 Days [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,834	441		1,257
Greater than 90 Days [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due			175		37
Greater than 90 Days [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		372			445
Greater than 90 Days [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		695
Greater than 90 Days [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due					525
Greater than 90 Days [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		767	266		250
Greater than 90 Days [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9			23
Greater than 90 Days [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9			20
Greater than 90 Days [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due					3
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		32,797	24,870		36,961
Total Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,278	6,726		10,818
Total Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,069	5,867		10,665
Total Past Due [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		209	859		153
Total Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		865	243		4,846
Total Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		24,785	17,042		20,798
Total Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7,390	3,926		3,599
Total Past Due [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		636	668		452
Total Past Due [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,878	1,604		5,174
Total Past Due [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,886	1,151		4,342
Total Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		8,995	9,693		7,231
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		869	859		499
Total Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		733	809		371
Total Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		136	50		128
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,543,418	6,416,998		5,529,208
Current [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,169,787	1,131,681		1,019,030
Current [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		948,617	911,450		827,384
Current [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		221,170	220,231		191,646
Current [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		76,152	76,704		78,037
Current [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		4,613,087	4,510,953		3,880,858
Current [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		913,800	955,500		802,612
Current [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		307,070	305,654		225,490
Current [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		733,239	730,485		630,986
Current [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,039,132	953,249		876,839
Current [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,619,846	1,566,065		1,344,931
Current [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		684,392	697,660		551,283
Current [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		536,677	549,826		419,447
Current [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 147,715	$ 147,834		$ 131,836
[1] All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees and costs, as disclosed on the face of the consolidated balance sheet. 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.

Loans Held for Sale - Additiona

Loans Held for Sale - Additional Information (Detail) - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Loans Receivables Held For Sale Net [Abstract]
Loans held for sale	$ 11,996,000	$ 11,965,000	$ 27,670,000
Loans held-for-sale at the lower of cost or fair value	$ 230,000	$ 1,468,000	$ 5,288,000

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
IRLCs [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	$ 58,706	$ 41,664	$ 106,806
Asset Derivative Fair Value	827	400	276
Liability Derivative Fair Value	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	69,500	45,000	115,000
Asset Derivative Fair Value	0	85	2,103
Liability Derivative Fair Value	$ 334	$ 0	$ 0

Borrowings - Schedule of Borrow

Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Debt Disclosure [Abstract]
Securities sold under agreements with customers to repurchase	$ 608,299	$ 618,829	$ 716,717
Federal funds purchased	3,575	2,625	20,825
Other Borrowings	21,053	21,053	21,053
Total	$ 632,927	$ 642,507	$ 758,595

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Line of Credit Facility [Line Items]
Revolving line of credit, permitted	$ 25,000,000
Line of credit	0	$ 0	$ 0
Other borrowings	$ 21,053,000
Line of credit, maturity date	Jun. 30, 2021
Federal Home Loan Bank Borrowings [Member]
Line of Credit Facility [Line Items]
Line of credit	$ 0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income Taxes [Line Items]
Federal statutory tax rate	21%
Income tax expense	$ 11,688,000	$ 10,341,000
Effective tax rates on pre-tax income	18.19%	15.59%
Initial capital contribution commitment	$ 5,500,000
Initial contribution included in other assets	131,000	$ 55,000	$ 131,000
Leveraged loan, invest in other borrowings	$ 21,053,000
NMTC Investments [Member]
Income Taxes [Line Items]
Tax Benefit Percent of Qualified Investments	0.39
Investment related liabilities	$ 26,553,000	29,000,000	26,825,000
FFB Paris Investment Fund, LLC [Member]
Income Taxes [Line Items]
Loan investment	18,000,000	18,000,000	18,000,000
Leveraged loan, invest in other borrowings	$ 21,053,000	$ 21,053,000	$ 21,053,000

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Apr. 27, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate	20%
Duration of options granted, years	10 years
Stock options outstanding, exercise price range, lower	$ 15.43
Stock options outstanding, exercise price range, upper	$ 48.91
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	$ 4,903,000
Weighted-average period of unrecognized compensation cost recognition, years	1 year 10 months 20 days
Total fair value of shares vested	$ 15,000	$ 65,000
Stock compensation expense	444,000	316,000
Dividends Payable	24,274,000	21,411,000	$ 24,278,000
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
Two Thousand Twenty One Omnibus Stock and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of stock for issuance under the plan	1,877,004			2,500,000
2021 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate	20%
Other Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends Payable	$ 82,000	59,000	$ 74,000
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of shares vested	$ 98,000	148,000
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	150,000	170,000
Restricted Stock [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 358,000	426,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period	2 years
Percentage of option vesting rate	20%
Performance Shares [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 358,000	426,000
Performance Shares [Member] | Executives And Other Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period	3 years
Criteria period	3 years
Average adjusted earnings per share growth percentage	50%
Performance Shares [Member] | Executives And Other Officers [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage	200%
Performance Shares [Member] | Executives And Other Officers [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage	0%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	$ 2,576,000	$ 2,436,000
Weighted-average period of unrecognized compensation cost recognition, years	1 year 2 months 1 day	1 year 18 days
Restricted Stock Units [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 358,000	$ 426,000

Stock Based Compensation - Sche

Stock Based Compensation - Schedule of Changes in Stock Units (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	24,813	46,598
Grants		615
Vesting	(2,872)	(3,161)
Forfeited/expired	(1,105)	(200)
Balance at end of period	20,836	43,852
Balance at beginning of period	$ 36.21	$ 35.75
Weighted Average Grant Date Fair Value, Grants		49.60
Weighted Average Grant Date Fair Value, Vesting	28.25	32.06
Weighted Average Grant Date Fair Value, Forfeited/expired	29.70	29.70
Balance at end of period	$ 37.53	$ 36.24
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	39,657	22,597
Grants	0	0
Vesting	0	0
Forfeited/expired	(2,888)	0
Balance at end of period	36,769	22,597
Balance at beginning of period	$ 47.83	$ 48.91
Weighted Average Grant Date Fair Value, Grants	0	0
Weighted Average Grant Date Fair Value, Vesting	0	0
Weighted Average Grant Date Fair Value, Forfeited/expired	47.87	0
Balance at end of period	$ 47.83	$ 48.91
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	47,082	22,597
Forfeited/expired	(3,456)
Balance at end of period	43,626	22,597
Balance at beginning of period	$ 48	$ 48.91
Weighted Average Grant Date Fair Value, Forfeited/expired	48.04
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	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Payment Arrangement [Abstract]
Balance at beginning of period	24,813	46,598
Grants		615
Vesting	(2,872)	(3,161)
Forfeited/expired	(1,105)	(200)
Balance at end of period	20,836	43,852
Balance at beginning of period	$ 36.21	$ 35.75
Grants		49.60
Vesting	28.25	32.06
Forfeited/expired	29.70	29.70
Balance at end of period	$ 37.53	$ 36.24

Stock Based Compensation - Sc_2

Stock Based Compensation - Schedule of Analysis of Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding, beginning of period, Shares | shares	1,490,413
Exercised, Shares | shares	(47,620)
Cancelled, Shares | shares	(32,255)
Outstanding, end of period, Shares | shares	1,410,538
Exercisable at end ofperiod, Shares | shares	722,398
Outstanding, beginning of period, Weighted-Average Ex. Price | $ / shares	$ 29.99
Exercised, Weighted-Average Ex. Price | $ / shares	19.03
Cancelled, Weighted-Average Ex. Price | $ / shares	43.69
Outstanding, end of period, Weighted-Average Ex. Price | $ / shares	30.05
Exercisable at end of period, Weighted-Average Ex. Price | $ / shares	$ 22.27

Fair Value Disclosures - Additi

Fair Value Disclosures - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) Loans	Mar. 31, 2022 USD ($) Loans	Dec. 31, 2022 USD ($) Loans
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	175,000	0	$ 0
Real state owned	175,000	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real state owned	$ 0	$ 0
Residential Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of loans held-for-sale | Loans	0	0	0
Recognized credit losses	$ 0	$ 0
Minimum [Member] | Measurement Input, Discount Rate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [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] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt discounts, percentage	25

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	$ 5,298,557,000	$ 5,474,359,000	$ 6,502,495,000
Loans held for sale	11,996,000	11,965,000	27,670,000
U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	488,242,000	482,549,000	301,344,000
Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	1,773,612,000	1,898,611,000	2,529,481,000
Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	2,583,170,000	2,616,566,000	3,265,191,000
Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	349,936,000	374,869,000	337,678,000
IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	827,000	400,000	276,000
Liability Derivative Fair Value	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	0	85,000	2,103,000
Liability Derivative Fair Value	334,000	0	0
Fair Value, Measurements, Recurring [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	5,298,557,000	5,474,359,000	6,502,495,000
Loans held for sale	11,766,000	10,497,000	22,382,000
Liability Derivative Fair Value	(334,000)
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	488,242,000	482,549,000	301,344,000
Fair Value, Measurements, Recurring [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	1,773,612,000	1,898,611,000	2,529,481,000
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	2,583,170,000	2,616,566,000	3,265,191,000
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	349,936,000	374,869,000	337,678,000
Fair Value, Measurements, Recurring [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	827,000	400,000	276,000
Fair Value, Measurements, Recurring [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value			2,103,000
Liability Derivative Fair Value		85,000
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	99,620,000	97,850,000	64,581,000
Fair Value, Measurements, Recurring [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	3,977,000	3,914,000	4,220,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	492,219,000	486,463,000	305,564,000
Loans held for sale	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	488,242,000	482,549,000	301,344,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value			0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	3,977,000	3,914,000	4,220,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	4,806,338,000	4,987,896,000	6,196,931,000
Loans held for sale	11,766,000	10,497,000	22,382,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	1,773,612,000	1,898,611,000	2,529,481,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	2,583,170,000	2,616,566,000	3,265,191,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	349,936,000	374,869,000	337,678,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	827,000	400,000	276,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value			2,103,000
Liability Derivative Fair Value	(334,000)	85,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	99,620,000	97,850,000	64,581,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0		0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Loans held for sale	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value			0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Securities available-for-sale, Estimated Fair Value	$ 0	$ 0	$ 0

Fair Value Disclosures - Summar

Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Fair Value Measurements Loans Held For Sale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 11,416	$ 10,226	$ 22,233
Net unrealized gains on loans held-for-sale	350	271	149
Loans held-for-sale at fair value	$ 11,766	$ 10,497	$ 22,382

Fair Value Disclosures - Schedu

Fair Value Disclosures - Schedule of Gain Loss on Sale of Mortgage Loans (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Schedule Of Gain Loss On Sale Of Mortgage Loans [Abstract]
Realized gain on sale and fees on mortgage loans*	[1]	$ 2,859	$ 5,998
Change in fair value on loans held-for-sale and IRLCs		534	(1,915)
Change in forward mortgage-backed securities trades		(419)	2,250
Total gain on sale of mortgage loans		$ 2,974	$ 6,333
[1] This includes gains 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 ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 224,875,000	$ 293,286,000	$ 203,187,000
Interest-Bearing Deposits in Banks and Other Financial Institutions	221,336,000	37,392,000	394,566,000
Securities available-for-sale, Estimated Fair Value	5,298,557,000	5,474,359,000	6,502,495,000
Net loans held for -investment	6,495,397,000	6,366,034,000	5,499,256,000
Loans held for sale	11,996,000	11,965,000	27,670,000
Borrowings	632,927,000	642,507,000	758,595,000
IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	827,000	400,000	276,000
Liability Derivative Fair Value	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	0	85,000	2,103,000
Liability Derivative Fair Value	334,000	0	0
Carrying Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	224,875,000	293,286,000	203,187,000
Interest-Bearing Deposits in Banks and Other Financial Institutions	221,336,000	37,392,000	394,566,000
Deposits with no stated maturities	10,196,920,000	10,480,841,000	10,550,695,000
Carrying Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	11,996,000	11,965,000	27,670,000
Accrued interest receivable	50,658,000	58,162,000	48,066,000
Deposits with stated maturities	739,498,000	524,666,000	449,130,000
Borrowings	632,927,000	642,507,000	758,595,000
Accrued interest payable		1,121,000	268,000
Carrying Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	827,000	400,000	276,000
Carrying Value [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability Derivative Fair Value	(334,000)	85,000	2,103,000
Carrying Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, Estimated Fair Value	5,298,557,000	5,474,359,000	6,502,495,000
Carrying Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net loans held for -investment	6,495,397,000	6,366,034,000	5,499,256,000
Estimated Fair Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	224,875,000	293,286,000	203,187,000
Interest-Bearing Deposits in Banks and Other Financial Institutions	221,336,000	37,392,000	394,566,000
Deposits with no stated maturities	10,196,920,000	10,480,841,000	10,550,695,000
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	12,018,000	11,965,000	26,985,000
Accrued interest receivable	50,658,000	58,162,000	48,066,000
Deposits with stated maturities	736,434,000	518,811,000	449,987,000
Borrowings	632,927,000	642,507,000	758,595,000
Accrued interest payable	3,617,000	1,121,000	268,000
Estimated Fair Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	827,000	400,000	276,000
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liability Derivative Fair Value	(334,000)	85,000	2,103,000
Estimated Fair Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale, Estimated Fair Value	5,298,557,000	5,474,359,000	6,502,495,000
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net loans held for -investment	$ 6,464,027,000	$ 6,372,859,000	$ 5,522,778,000