10-Q

2

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 0-07674

First Financial Bankshares, Inc.

(Exact name of registrant as specified in its charter)

Texas	75-0944023
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
400 Pine Street, Abilene, Texas	79601
(Address of principal executive offices)	(Zip Code)

(325) 627-7155

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 par value	FFIN	The Nasdaq Global Select Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T(§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2of the Act). Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

Class	Outstanding at May 3, 2024
Common Stock, $0.01 par value per share	142,841,009

TABLE OF CONTENTS

Item		Page
1.	Financial Statements	3
	Consolidated Balance Sheets – Unaudited	4
	Consolidated Statements of Earnings – Unaudited	5
	Consolidated Statements of Comprehensive Earnings (Loss) – Unaudited	6
	Consolidated Statements of Shareholders’ Equity – Unaudited	7
	Consolidated Statements of Cash Flows – Unaudited	8
	Notes to Consolidated Financial Statements – Unaudited	9
2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	40
3.	Quantitative and Qualitative Disclosures About Market Risk	53
4.	Controls and Procedures	54
PART II - OTHER INFORMATION
1.	Legal Proceedings	55
1A.	Risk Factors	55
2.	Unregistered Sales of Equity Securities and Use of Proceeds	55
3.	Defaults Upon Senior Securities	55
4.	Mine Safety Disclosures	55
5.	Other Information	55
6.	Exhibits	56
	Signatures	57

2

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

The consolidated balance sheets of First Financial Bankshares, Inc. and Subsidiaries (the “Company” or “we”) at March 31, 2024 and 2023 (unaudited), and December 31, 2023, and the consolidated statements of earnings, comprehensive earnings (loss) and shareholders’ equity for the three-months ended March 31, 2024 and 2023 (unaudited), and the consolidated statements of cash flows for the three-months ended March 31, 2024 and 2023 (unaudited), and notes to consolidated financial statements (unaudited), follow on pages 4 through 39.

3

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands, except per share amounts)

	March 31,						December 31,
	2024			2023			2023
	(Unaudited)
ASSETS
CASH AND DUE FROM BANKS	$	222,464		$	224,875		$	281,354
FEDERAL FUNDS SOLD		12,300			—			—
INTEREST-BEARING DEMAND DEPOSITS IN BANKS		365,397			221,336			255,237
Total cash and cash equivalents		600,161			446,211			536,591
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of    these securities was $5,217,517, $5,879,040, and $5,243,681 as of     March 31, 2024 and 2023, and December 31, 2023, respectively)		4,658,526			5,298,557			4,732,762
LOANS:
Held-for-investment		7,229,410			6,576,215			7,148,791
Less—allowance for credit losses		(89,562	)		(80,818	)		(88,734	)
Net loans held-for-investment		7,139,848			6,495,397			7,060,057
Held-for-sale ($15,080, $11,766, and $11,077, at fair value at       March 31, 2024 and 2023, and December 31, 2023, respectively)		16,109			11,996			14,253
BANK PREMISES AND EQUIPMENT, net		151,953			153,718			151,788
INTANGIBLE ASSETS, net		314,465			315,306			314,622
OTHER ASSETS		310,096			286,801			295,521
Total assets	$	13,191,158		$	13,007,986		$	13,105,594
LIABILITIES AND SHAREHOLDERS’ EQUITY
NONINTEREST-BEARING DEPOSITS	$	3,348,147		$	3,890,991		$	3,435,586
INTEREST-BEARING DEPOSITS		7,941,661			7,045,427			7,702,714
Total deposits		11,289,808			10,936,418			11,138,300
DIVIDENDS PAYABLE		25,754			24,274			25,712
REPURCHASE AGREEMENTS		307,297			608,299			381,928
BORROWINGS		26,803			24,628			22,153
OTHER LIABILITIES		50,129			41,514			38,601
Total liabilities		11,699,791			11,635,133			11,606,694
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
COMMON STOCK — ($0.01 par value, authorized 200,000,000 shares;    142,817,159, 142,703,531, and 142,716,939 shares issued at    March 31, 2024 and 2023, and December 31, 2023, respectively)		1,428			1,427			1,427
CAPITAL SURPLUS		683,997			679,429			681,246
RETAINED EARNINGS		1,247,169			1,150,246			1,219,525
TREASURY STOCK (shares at cost: 931,427, 927,789 and 930,152 at    March 31, 2024 and 2023, and December 31, 2023, respectively)		(12,120	)		(11,271	)		(11,855	)
DEFERRED COMPENSATION		12,120			11,271			11,855
ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSS), net		(441,227	)		(458,249	)		(403,298	)
Total shareholders’ equity		1,491,367			1,372,853			1,498,900
Total liabilities and shareholders’ equity	$	13,191,158		$	13,007,986		$	13,105,594

See notes to consolidated financial statements.

4

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EARNINGS—(UNAUDITED)

(Dollars in thousands, except per share amounts)

	Three-Months Ended March 31,
	2024		2023
INTEREST INCOME:
Interest and fees on loans	$	117,091	$	89,009
Interest on investment securities:
Taxable		19,952		20,782
Exempt from federal income tax		7,737		10,067
Interest on federal funds sold and interest-bearing demand    deposits in banks		4,715		1,650
Total interest income		149,495		121,508
INTEREST EXPENSE:
Interest on deposits		45,251		21,812
Interest on repurchase agreements and borrowings		4,002		3,410
Total interest expense		49,253		25,222
Net interest income		100,242		96,286
PROVISION FOR CREDIT LOSSES		808		2,781
Net interest income after provision for credit losses		99,434		93,505
NONINTEREST INCOME:
Trust fees		11,379		9,845
Service charges on deposit accounts		6,246		6,036
Debit card fees		4,891		4,936
Credit card fees		631		609
Gain on sale and fees on mortgage loans		3,128		2,974
Net gain on sale of available-for-sale securities		—		12
Net gain on sale of foreclosed assets		—		34
Net gain on sale of other assets		—		930
Interest on loan recoveries		555		346
Other		2,553		2,285
Total noninterest income		29,383		28,007
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits		36,683		31,461
Net occupancy expense		3,470		3,430
Equipment expense		2,237		2,127
FDIC insurance premiums		1,965		1,654
Debit card expense		3,058		3,199
Professional and service fees		2,396		2,365
Printing, stationery and supplies		447		710
Operational and other losses		1,154		931
Software amortization and expense		3,005		2,311
Amortization of intangible assets		157		228
Other		9,368		8,840
Total noninterest expense		63,940		57,256
EARNINGS BEFORE INCOME TAXES		64,877		64,256
INCOME TAX EXPENSE		11,480		11,688
NET EARNINGS	$	53,397	$	52,568
NET EARNINGS PER SHARE, BASIC	$	0.37	$	0.37
NET EARNINGS PER SHARE, DILUTED	$	0.37	$	0.37
DIVIDENDS PER SHARE	$	0.18	$	0.17

See notes to consolidated financial statements.

5

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) —(UNAUDITED)

(Dollars in thousands)

	Three-Months Ended March 31,
	2024			2023
NET EARNINGS	$	53,397		$	52,568
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain (loss) on investment securities available-for-    sale, before income taxes		(48,011	)		97,454
Reclassification adjustment for realized (gains) losses on investment    securities included in net earnings, before income taxes		—			(12	)
Total other items of comprehensive earnings (loss)		(48,011	)		97,442
Income tax benefit (expense) related to:
Change in unrealized gain (loss) on investment securities available-for-    sale		10,082			(20,466	)
Reclassification adjustment for realized gains (losses) on investment    securities included in net earnings		—			3
Total income tax benefit (expense)		10,082			(20,463	)
COMPREHENSIVE EARNINGS (LOSS)	$	15,468		$	129,547

See notes to consolidated financial statements.

6

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(Dollars in thousands, except per share amounts)

	Common Stock				Capital		Retained			Treasury Stock						Deferred		Accumulated Other Comprehensive Earnings			Total Shareholders’
	Shares		Amount		Surplus		Earnings			Shares			Amounts			Compensation		(Loss)			Equity
Balances at December 31, 2022		142,657,871	$	1,427	$	677,593	$	1,121,945			(929,210	)	$	(11,035	)	$	11,035	$	(535,228	)	$	1,265,737
Net earnings (unaudited)		—		—		—		52,568			—			—			—		—			52,568
Stock option exercises/   stock unit conversions/   restricted stock activity    (unaudited)		45,660		—		884		—			—			—			—		—			884
Cash dividends declared,    $0.17 per share (unaudited)		—		—		—		(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)		—		—		—		—			1,421			(236	)		236		—			—
Stock-based compensation expense    (unaudited)		—		—		952		—			—			—			—		—			952
Balances at March 31, 2023 (unaudited)		142,703,531	$	1,427	$	679,429	$	1,150,246			(927,789	)	$	(11,271	)	$	11,271	$	(458,249	)	$	1,372,853
Balances at December 31, 2023		142,716,939	$	1,427	$	681,246	$	1,219,525			(930,152	)	$	(11,855	)	$	11,855	$	(403,298	)	$	1,498,900
Net earnings (unaudited)		—		—		—		53,397			—			—			—		—			53,397
Stock option exercises/   stock unit conversions/   restricted stock activity    (unaudited)		100,220		1		1,622		—			—			—			—		—			1,623
Cash dividends declared,    $0.18 per share (unaudited)		—		—				(25,753	)		—			—			—		—			(25,753	)
Change in unrealized gain    (loss) in investment    securities available-for-sale,    net of related income taxes    (unaudited)		—		—		—		—			—			—			—		(37,929	)		(37,929	)
Shares purchased in    connection with directors’    deferred compensation    plan, net (unaudited)		—		—		—		—			(1,275	)		(265	)		265		—			—
Stock-based compensation expense    (unaudited)		—		—		1,129		—			—			—			—		—			1,129
Balances at March 31, 2024 (unaudited)		142,817,159	$	1,428	$	683,997	$	1,247,169			(931,427	)	$	(12,120	)	$	12,120	$	(441,227	)	$	1,491,367

See notes to consolidated financial statements.

7

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS—(UNAUDITED)

(Dollars in thousands)

	Three-Months Ended March 31,
	2024			2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$	53,397		$	52,568
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		3,221			3,074
Provision for credit losses		808			2,781
Securities premium amortization, net		11,153			13,770
Gain on sale of securities and other assets, net		—			(976	)
Stock-based compensation		1,129			952
Net tax benefit from stock-based compensation		102			93
Change in loans held-for-sale		(1,797	)		48
Change in other assets		(4,245	)		15,851
Change in other liabilities		11,875			7,755
Total adjustments		22,246			43,348
Net cash provided by operating activities		75,643			95,916
CASH FLOWS FROM INVESTING ACTIVITIES:
Activity in available-for-sale securities:
Sales		—			145,948
Maturities		3,644,519			116,922
Purchases		(3,629,507	)		(3,298	)
Net increase in loans held-for-investment		(80,652	)		(133,974	)
Purchases of bank premises, equipment and software		(3,912	)		(6,347	)
Proceeds from sale of bank premises and equipment and other assets		41			2,423
Net cash provided by (used in) investing activities		(69,511	)		121,674
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits		(87,439	)		(170,797	)
Net increase in interest-bearing deposits		238,947			101,708
Net increase (decrease) in repurchase agreements and borrowings		(69,981	)		(9,581	)
Common stock transactions:
Proceeds from stock option exercises/stock unit conversions/restricted stock activity		1,623			884
Dividends paid		(25,712	)		(24,271	)
Net cash provided by (used in) financing activities		57,438			(102,057	)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		63,570			115,533
CASH AND CASH EQUIVALENTS, beginning of period		536,591			330,678
CASH AND CASH EQUIVALENTS, end of period	$	600,161		$	446,211
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	$	51,106		$	22,726
Transfer of loans to other real estate		454			175

See notes to consolidated financial statements.

8

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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, 2024. The Company’s subsidiary bank is First Financial Bank. 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 is located. In addition, the Company also owns First Financial Trust & Asset Management Company, First Financial Insurance Agency, Inc. (inactive), First Technology Services, Inc., FFB Investment Paris Fund, LLC, and FFB Portfolio Management, Inc.

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. On July 25, 2023, the Company's Board of Directors renewed the prior authorization through July 31, 2024. 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. Under the current authorization, the Company has repurchased and retired 101,337 shares (all during September 2023) at an average price of $26.99 per share.

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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. 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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. The adoption of ASU 2021-01 did not have a significant impact on our financial statements.

9

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 became 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.

ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848." ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance provided by ASU 2020-04 and ASU 2021-01, which are discussed above. ASU 2022-06, which was effective upon issuance, defers the sunset date of this prior guidance from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief guidance in Topic 848. The adoption of ASU 2022-06 did not have a significant impact on our financial statements.

ASU 2023-02, "Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method." ASU 2023-02 is intended to improve the accounting and disclosures for investments in tax credit structures. ASU 2023-02 allows entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. Previously, this method was only available for qualifying tax equity investments in low-income housing tax credit structures. ASU 2023-02 has been early adopted by the Company as it relates to the qualifying investments that are generating New Market Tax Credits. The adoption of ASU 2023-02 did not have a significant impact on our financial statements.

ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” ASU 2023-09 requires entities to disclose more detailed information in their reconciliation of their statutory tax rate to their effective tax rate. Public business entities (PBEs) are required to provide this incremental detail in a numerical, tabular format. The ASU also requires entities to disclose more detailed information about income taxes paid, including by jurisdiction; pretax income (or loss) from continuing operations; and income tax expense (or benefit). PBEs will be required to adopt the new requirements in annual reporting periods beginning after December 15, 2024, and interim periods beginning after December 15, 2025. The adoption of ASU 2023-09 is not expected to 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, 2024 or 2023, respectively.

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 if 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

10

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, 2024 and 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023, 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. 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.

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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 based on the risk perceived in concentrations of the loan portfolio, changes in economic conditions, early delinquencies, and factors related to credit administrations, including, among others, underwriting standards, loan-to-value ratios, and borrowers’ risk rating; and (3) individual allowances on loans where borrowers are experiencing financial difficulty or when the Company determines that the foreclosure is probable.

In calculating the allowance for credit losses, most loans are segmented into pools based upon similar characteristics and risk profiles. Common characteristics and risk profiles include the type/purpose of loan, underlying collateral, geographical similarity and historical/expected credit loss patterns. In developing these loan pools for the purposes of modeling expected credit losses, we also analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors. For modeling purposes, our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. We periodically reassess each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. Refer to Note 3 for more details on the Company’s portfolio segments.

The Company applies two methodologies to estimate the allowance on its pooled portfolio segments; discounted cash flows method and weighted average remaining life method. Allowance estimates on the following portfolio segments are calculated using the discounted cash flows method: C&I, Municipal, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE and Residential. Allowance estimates on the following portfolio segments are calculated using the remaining life method: Agriculture, Consumer Auto and Consumer Non-Auto. The models related to these methodologies utilize the Company’s historical default and loss experience adjusted for future economic forecasts. The reasonable and supportable forecast period represents a one-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period, expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include: Texas unemployment rate, Texas house price index and Texas retail sales index. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience.

In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within our loan pools. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk rating of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management’s assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. We reevaluate the fair value of collateral supporting collateral dependent loans on an ongoing basis.

Management qualitatively adjusts model results for risk factors that are not considered within our modeling processes but are nonetheless relevant in assessing the expected credit losses within our loan pools. These qualitative factor (“Q-Factor”) adjustments may increase management’s estimate of expected credit losses based upon the estimated level of risk within the risk factor. The various risk factors 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

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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, 2024 and 2023, and December 31, 2023, the Company’s reserve for unfunded commitments totaled $7,455,000, $10,397,000 and $7,903,000, 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, and is included in other assets in the consolidated balance sheet. 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 ACL. 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 during the three-months ended March 31, 2024 or 2023, 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.

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Accumulated Other Comprehensive Earnings (Loss)

Unrealized net losses on the Company’s available-for-sale securities, net of applicable income taxes, totaled $441,227,000, $458,249,000 and $403,298,000 at March 31, 2024, and 2023, and December 31, 2023, 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, 2024, and 2023, and December 31, 2023, deferred tax assets totaled $122,844,000, $122,947,000 and $110,800,000, 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 three, 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 performance stock units which vest over a three-year period based on Company performance metrics relative to a defined peer group. 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 determined 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 417,000 and 480,000 anti-dilutive shares for the three-months ended March 31, 2024 and 2023, 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, 2024:
Net earnings per share, basic	$	53,397		142,724,674	$	0.37
Effect of stock options and stock grants		—		304,775		—
Net earnings per share, diluted	$	53,397		143,029,449	$	0.37

	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

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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, 2024
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	445,399	$	—	$	(13,231	)	$	432,168
Obligations of states and political subdivisions		1,592,523		570		(139,058	)		1,454,035
Residential mortgage-backed securities		2,685,896		72		(386,691	)		2,299,277
Commercial mortgage-backed securities		381,198		52		(12,344	)		368,906
Corporate bonds and other		112,501		—		(8,361	)		104,140
Total securities available-for-sale	$	5,217,517	$	694	$	(559,685	)	$	4,658,526

	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

	December 31, 2023
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	496,975	$	4	$	(14,745	)	$	482,234
Obligations of states and political subdivisions		1,621,405		934		(125,182	)		1,497,157
Residential mortgage-backed securities		2,716,968		7		(352,883	)		2,364,092
Commercial mortgage-backed securities		295,663		—		(11,339	)		284,324
Corporate bonds and other		112,670		—		(7,715	)		104,955
Total securities available-for-sale	$	5,243,681	$	945	$	(511,864	)	$	4,732,762

The Company did not hold any securities classified as held-to-maturity at March 31, 2024, March 31, 2023, or December 31, 2023.

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, 2024 and 2023, and December 31, 2023, 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, 2024, by contractual and expected maturity, are shown below (dollars in thousands):

	Amortized		Estimated
	Cost Basis		Fair Value
Due within one year	$	343,112	$	337,823
Due after one year through five years		1,374,546		1,288,485
Due after five years through ten years		2,421,721		2,126,343
Due after ten years		1,078,138		905,875
Total	$	5,217,517	$	4,658,526

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The following tables disclose as of March 31, 2024 and 2023, and December 31, 2023, 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, 2024	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	2,438	$	16	$	429,730	$	13,215	$	432,168	$	13,231
Obligations of states and political subdivisions		33,073		114		1,398,108		138,944	$	1,431,181		139,058
Residential mortgage-backed securities		22,586		299		2,261,311		386,392	$	2,283,897		386,691
Commercial mortgage-backed securities		64,721		507		275,924		11,837	$	340,645		12,344
Corporate bonds and other		—		—		104,140		8,361	$	104,140		8,361
Total	$	122,818	$	936	$	4,469,213	$	558,749	$	4,592,031	$	559,685

	Less than 12 Months				12 Months or Longer				Total
March 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
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
December 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	3,477	$	7	$	477,306	$	14,738	$	480,783	$	14,745
Obligations of states and political subdivisions		11,855		34		1,427,975		125,148		1,439,830		125,182
Residential mortgage-backed securities		1,631		1		2,361,089		352,882		2,362,720		352,883
Commercial mortgage-backed securities		—		—		284,324		11,339		284,324		11,339
Corporate bonds and other		—		—		104,955		7,715		104,955		7,715
Total	$	16,963	$	42	$	4,655,649	$	511,822	$	4,672,612	$	511,864

The number of investments in an unrealized loss position totaled 832 at March 31, 2024. 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, 2024 and 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023. 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, 2024, 66.95% of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 56.31% are guaranteed by the Texas Permanent School Fund.

Securities, carried at approximately $2,516,117,000 on March 31, 2024, 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, 2024, there were no sales of investment securities that were classified as available-for-sale. During the three-months ended March 31, 2023, sales of investment securities that were classified as available-for-sale were $145,948,000. There were no gross realized security gains or losses from sales and calls during the first quarter of 2024. Gross realized security gains from sales and calls during the first quarter of 2023 totaled $1,052,000. Gross realized security losses from sales or calls during the first quarter of 2023 totaled $1,040,000.

The specific identification method was used to determine cost in order to compute the realized gains and losses.

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Note 3 – Loans Held-for-Investment and Allowance for Credit Losses

For the periods ended March 31, 2024 and 2023, and December 31, 2023, 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,
	2024			2023			2023
Commercial:
C&I	$	1,191,516		$	954,686		$	1,164,811
Municipal		211,013			221,379			214,850
Total Commercial		1,402,529			1,176,065			1,379,661
Agricultural		87,882			77,017			84,890
Real Estate:
Construction & Development		921,773			921,190			963,158
Farm		311,002			307,706			344,954
Non-Owner Occupied CRE		853,721			737,117			827,969
Owner Occupied CRE		1,032,845			1,043,018			1,037,281
Residential		1,918,573			1,628,841			1,834,593
Total Real Estate		5,037,914			4,637,872			5,007,955
Consumer:
Auto		549,837			537,410			521,859
Non-Auto		151,248			147,851			154,426
Total Consumer		701,085			685,261			676,285
Total Loans		7,229,410			6,576,215			7,148,791
Less: Allowance for credit losses		(89,562	)		(80,818	)		(88,734	)
Loans, net	$	7,139,848		$	6,495,397		$	7,060,057

Outstanding loan balances at March 31, 2024 and 2023, and December 31, 2023, are net of unearned income, including net deferred loan fees.

At March 31, 2024, $5,095,506,000 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, 2024, this available line of credit was $1,984,900,000. At March 31, 2024, there was $781,500,000 used on the line advance for undisbursed commitments (letters of credit) used to secure public funds.

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,
	2024		2023		2023
Nonaccrual loans	$	36,157	$	24,171	$	33,609
Loans still accruing and past due 90 days or more		33		22		1,004
Total nonperforming loans	$	36,190	$	24,193	$	34,613

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The Company had $37,204,000, $24,389,000 and $35,096,000 in nonaccrual, past due 90 days or more and still accruing, and foreclosed assets at March 31, 2024 and 2023, and December 31, 2023, respectively. Nonaccrual loans at March 31, 2024 and 2023, and December 31, 2023, consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Commercial:
C&I	$	3,950	$	5,343	$	4,132
Municipal		—		—		—
Total Commercial		3,950		5,343		4,132
Agricultural		2,043		161		155
Real Estate:
Construction & Development		1,976		773		1,444
Farm		4,597		452		4,804
Non-Owner Occupied CRE		9,243		2,907		8,022
Owner Occupied CRE		5,719		6,823		6,822
Residential		7,815		7,232		7,649
Total Real Estate		29,350		18,187		28,741
Consumer:
Auto		486		398		464
Non-Auto		328		82		117
Total Consumer		814		480		581
Total	$	36,157	$	24,171	$	33,609

No significant additional funds are committed to be advanced in connection with nonaccrual loans as of March 31, 2024.

Summary information on the allowance for credit losses for the three-months ended March 31, 2024 and 2023, are outlined by portfolio segment in the following tables (dollars in thousands):

Three-Months Ended March 31, 2024	C&I			Municipal		Agricultural			Construction & Development			Farm
Beginning balance	$	15,698		$	195	$	1,281		$	28,553		$	2,914
Provision for loan losses		501			—		2,017			(3,709	)		(397	)
Recoveries		111			—		5			—			—
Charge-offs		(204	)		—		(60	)		(33	)		—
Ending balance	$	16,106		$	195	$	3,243		$	24,811		$	2,517

Three-Months Ended March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE			Residential		Auto			Non-Auto			Total
Beginning balance	$	13,425	$	13,813		$	11,654	$	810		$	391		$	88,734
Provision for loan losses		1,536		(1,099	)		1,813		384			210			1,256
Recoveries		7		42			98		112			47			422
Charge-offs		—		—			—		(399	)		(154	)		(850	)
Ending balance	$	14,968	$	12,756		$	13,565	$	907		$	494		$	89,562

Three-Months Ended March 31, 2023	C&I			Municipal		Agricultural			Construction & Development		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 Occupied CRE			Owner Occupied CRE		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

18

Additionally, the Company records a reserve for unfunded commitments in other liabilities, which totaled $7,455,000, $10,397,000 and $7,903,000 at March 31, 2024 and 2023, and December 31, 2023, respectively. The provision for loan losses of $1,256,000 for the three-months ended March 31, 2024 is combined with the reversal of the provision for unfunded commitments of $448,000 and reported in the net aggregate of $808,000 under the provision for credit losses in the consolidated statement of earnings for the three-months ended March 31, 2024.

The $4,707,000 provision for loan losses for the three-months ended March 31, 2023 above is combined with the reversal of provision for unfunded commitments of $1,926,000 and reported in the aggregate of $2,781,000 under the provision for credit losses for the three-months ended March 31, 2023.

The Company’s loans that are individually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of March 31, 2024 and 2023, and December 31, 2023, are summarized in the following tables by loan segment (dollars in thousands):

March 31, 2024	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	756	$	3,194	$	37,504	$	41,454	$	1,541	$	4,170	$	5,711
Municipal		—		—		559		559		—		—		—
Total Commercial		756		3,194		38,063		42,013		1,541		4,170		5,711
Agricultural		713		1,330		4,044		6,087		849		1,881		2,730
Real Estate:
Construction & Development		903		1,073		28,953		30,929		189		2,054		2,243
Farm		—		4,597		1,936		6,533		727		31		758
Non-Owner Occupied CRE		1,850		7,393		22,412		31,655		1,235		1,772		3,007
Owner Occupied CRE		2,827		2,892		35,460		41,179		445		1,793		2,238
Residential		4,404		3,411		31,456		39,271		242		2,014		2,256
Total Real Estate		9,984		19,366		120,217		149,567		2,838		7,664		10,502
Consumer:
Auto		—		486		2,342		2,828		1		4		5
Non-Auto		—		328		764		1,092		72		57		129
Total Consumer		—		814		3,106		3,920		73		61		134
Total	$	11,453	$	24,704	$	165,430	$	201,587	$	5,301	$	13,776	$	19,077

March 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
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

19

December 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	1,322	$	2,810	$	18,633	$	22,765	$	1,363	$	4,495	$	5,858
Municipal		—		—		733		733		—		—		—
Total Commercial		1,322		2,810		19,366		23,498		1,363		4,495		5,858
Agricultural		57		98		1,304		1,459		50		700		750
Real Estate:
Construction & Development		758		686		22,545		23,989		148		2,253		2,401
Farm		—		4,804		1,362		6,166		937		57		994
Non-Owner Occupied CRE		1,919		6,103		29,117		37,139		700		2,984		3,684
Owner Occupied CRE		4,661		2,161		35,746		42,568		232		1,431		1,663
Residential		3,909		3,740		30,257		37,906		360		1,799		2,159
Total Real Estate		11,247		17,494		119,027		147,768		2,377		8,524		10,901
Consumer:
Auto		—		464		2,125		2,589		1		3		4
Non-Auto		—		117		782		899		—		60		60
Total Consumer		—		581		2,907		3,488		1		63		64
Total	$	12,626	$	20,983	$	142,604	$	176,213	$	3,791	$	13,782	$	17,573

The Company’s allowance for loans that are individually evaluated for credit losses and collectively evaluated for credit losses as of March 31, 2024 and 2023, and December 31, 2023, 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, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,711	$	—	$	2,730	$	2,243	$	758
Loans collectively evaluated for credit losses		10,395		195		513		22,568		1,759
Total	$	16,106	$	195	$	3,243	$	24,811	$	2,517

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,007	$	2,238	$	2,256	$	5	$	129	$	19,077
Loans collectively evaluated for credit losses		11,961		10,518		11,309		902		365		70,485
Total	$	14,968	$	12,756	$	13,565	$	907	$	494	$	89,562

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

20

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,858	$	—	$	750	$	2,401	$	994
Loans collectively evaluated for credit losses		9,840		195		531		26,152		1,920
Total	$	15,698	$	195	$	1,281	$	28,553	$	2,914

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,684	$	1,663	$	2,159	$	4	$	60	$	17,573
Loans collectively evaluated for credit losses		9,741		12,150		9,495		806		331		71,161
Total	$	13,425	$	13,813	$	11,654	$	810	$	391	$	88,734

The Company’s recorded investment in loans as of March 31, 2024 and 2023, and December 31, 2023, related to the balance in the allowance for credit losses follows below (dollars in thousands):

March 31, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	41,454	$	559	$	6,087	$	30,929	$	6,533
Loans collectively evaluated for credit losses		1,150,062		210,454		81,795		890,844		304,469
Total	$	1,191,516	$	211,013	$	87,882	$	921,773	$	311,002

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	31,655	$	41,179	$	39,271	$	2,828	$	1,092	$	201,587
Loans collectively evaluated for credit losses		822,066		991,666		1,879,302		547,009		150,156		7,027,823
Total	$	853,721	$	1,032,845	$	1,918,573	$	549,837	$	151,248	$	7,229,410

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	22,765	$	733	$	1,459	$	23,989	$	6,166
Loans collectively evaluated for credit losses		1,142,046		214,117		83,431		939,169		338,788
Total	$	1,164,811	$	214,850	$	84,890	$	963,158	$	344,954

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	37,139	$	42,568	$	37,906	$	2,589	$	899	$	176,213
Loans collectively evaluated for credit losses		790,830		994,713		1,796,687		519,270		153,527		6,972,578
Total	$	827,969	$	1,037,281	$	1,834,593	$	521,859	$	154,426	$	7,148,791

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).

21

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, 2024 (dollars in millions):

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	236	$	551	$	226	$	70	$	32	$	36	$	—	$	1,151
Special mention		6		17		1		—		—		—		—		24
Substandard		2		10		1		1		2		1		—		17
Doubtful		—		—		—		—		—		—		—		—
Total	$	244	$	578	$	228	$	71	$	34	$	37	$	—	$	1,192
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	5	$	20	$	81	$	15	$	10	$	79	$	—	$	210
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		1		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	5	$	20	$	81	$	16	$	10	$	79	$	—	$	211
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	18	$	54	$	6	$	3	$	1	$	—	$	—	$	82
Special mention		—		1		—		—		—		—		—		1
Substandard		3		1		—		—		—		1		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	21	$	56	$	6	$	3	$	1	$	1	$	—	$	88
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

22

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	117	$	438	$	240	$	63	$	19	$	14	$	—	$	891
Special mention		7		6		3		—		—		—		—		16
Substandard		1		7		1		6		—		—		—		15
Doubtful		—		—		—		—		—		—		—		—
Total	$	125	$	451	$	244	$	69	$	19	$	14	$	—	$	922
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	23	$	58	$	101	$	71	$	23	$	29	$	—	$	305
Special mention		—		1		—		—		—		—		—		1
Substandard		—		1		—		—		4		—		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	23	$	60	$	101	$	71	$	27	$	29	$	—	$	311
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	59	$	133	$	244	$	174	$	104	$	108	$	—	$	822
Special mention		—		—		—		1		1		1		—		3
Substandard		—		2		1		3		7		16		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	59	$	135	$	245	$	178	$	112	$	125	$	—	$	854
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	28	$	155	$	305	$	202	$	110	$	190	$	—	$	990
Special mention		—		2		1		8		—		—		—		11
Substandard		—		2		6		5		1		18		—		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	28	$	159	$	312	$	215	$	111	$	208	$	—	$	1,033
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

23

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	130	$	450	$	424	$	302	$	151	$	281	$	141	$	1,879
Special mention		—		1		1		1		1		2		1		7
Substandard		2		7		4		4		2		10		3		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	132	$	458	$	429	$	307	$	154	$	293	$	145	$	1,918
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	91	$	175	$	188	$	64	$	22	$	8	$	—	$	548
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		1		—		—		—		2
Doubtful		—		—		—		—		—		—		—		—
Total	$	91	$	175	$	189	$	65	$	22	$	8	$	—	$	550
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	18	$	59	$	41	$	20	$	3	$	2	$	7	$	150
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	18	$	60	$	41	$	20	$	3	$	2	$	7	$	151
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	725	$	2,093	$	1,856	$	984	$	475	$	747	$	148	$	7,028
Special mention		13		28		6		10		2		3		1		63
Substandard		8		31		14		21		16		46		3		139
Doubtful		—		—		—		—		—		—		—		—
Total	$	746	$	2,152	$	1,876	$	1,015	$	493	$	796	$	152	$	7,230
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

24

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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

25

March 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

26

March 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 December 31, 2023 (dollars in millions):

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	720	$	276	$	73	$	36	$	14	$	23	$	—	$	1,142
Special mention		1		1		—		—		1		—		—		3
Substandard		12		2		2		1		1		2		—		20
Doubtful		—		—		—		—		—		—		—		—
Total	$	733	$	279	$	75	$	37	$	16	$	25	$	—	$	1,165
Year-to-Date Gross Charge-Offs	$	—	$	—	$	1	$	—	$	—	$	—	$	—	$	1

27

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	25	$	83	$	15	$	10	$	1	$	80	$	—	$	214
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	25	$	83	$	16	$	10	$	1	$	80	$	—	$	215
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	63	$	15	$	4	$	1	$	1	$	—	$	—	$	84
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	64	$	15	$	4	$	1	$	1	$	—	$	—	$	85
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	515	$	311	$	78	$	20	$	9	$	6	$	—	$	939
Special mention		8		2		—		—		—		—		—		10
Substandard		9		4		1		—		—		—		—		14
Doubtful		—		—		—		—		—		—		—		—
Total	$	532	$	317	$	79	$	20	$	9	$	6	$	—	$	963
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	101	$	111	$	73	$	24	$	8	$	22	$	—	$	339
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		5		—		1		—		6
Doubtful		—		—		—		—		—		—		—		—
Total	$	101	$	111	$	73	$	29	$	8	$	23	$	—	$	345
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

28

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	167	$	232	$	172	$	106	$	41	$	73	$	—	$	791
Special mention		—		5		1		—		—		2		—		8
Substandard		2		1		2		7		13		4		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	169	$	238	$	175	$	113	$	54	$	79	$	—	$	828
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	154	$	305	$	217	$	114	$	62	$	142	$	—	$	994
Special mention		1		1		4		—		1		1		—		8
Substandard		3		6		4		—		7		15		—		35
Doubtful		—		—		—		—		—		—		—		—
Total	$	158	$	312	$	225	$	114	$	70	$	158	$	—	$	1,037
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	477	$	415	$	313	$	158	$	67	$	229	$	138	$	1,797
Special mention		1		2		2		2		—		3		1		11
Substandard		4		4		3		3		3		7		3		27
Doubtful		—		—		—		—		—		—		—		—
Total	$	482	$	421	$	318	$	163	$	70	$	239	$	142	$	1,835
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	195	$	212	$	74	$	26	$	10	$	2	$	—	$	519
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		1		1		—		—		—		3
Doubtful		—		—		—		—		—		—		—		—
Total	$	195	$	213	$	75	$	27	$	10	$	2	$	—	$	522
Year-to-Date Gross Charge-Offs	$	—	$	1	$	—	$	—	$	—	$	—	$	—	$	1

29

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	71	$	47	$	22	$	4	$	1	$	1	$	7	$	153
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	72	$	47	$	22	$	4	$	1	$	1	$	7	$	154
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	2,488	$	2,007	$	1,041	$	499	$	214	$	578	$	145	$	6,972
Special mention		11		11		7		2		2		6		1		40
Substandard		32		18		14		17		24		29		3		137
Doubtful		—		—		—		—		—		—		—		—
Total	$	2,531	$	2,036	$	1,062	$	518	$	240	$	613	$	149	$	7,149
Year-to-Date Gross Charge-Offs	$	—	$	1	$	1	$	—	$	—	$	—	$	—	$	2

At March 31, 2024 and 2023, and December 31, 2023, the Company’s past due loans are as follows (dollars in thousands):

March 31, 2024	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	6,462	$	250	$	1,594	$	8,306	$	1,183,210	$	1,191,516	$	33
Municipal		25		—		—		25		210,988		211,013		—
Total Commercial		6,487		250		1,594		8,331		1,394,198		1,402,529		33
Agricultural		624		—		71		695		87,187		87,882		—
Real Estate:
Construction & Development		9,277		258		1,347		10,882		910,891		921,773		—
Farm		855		7		95		957		310,045		311,002		—
Non-Owner Occupied CRE		1,840		19		1,374		3,233		850,488		853,721		—
Owner Occupied CRE		3,269		—		70		3,339		1,029,506		1,032,845		—
Residential		13,804		414		2,540		16,758		1,901,815		1,918,573		—
Total Real Estate		29,045		698		5,426		35,169		5,002,745		5,037,914		—
Consumer:
Auto		967		120		—		1,087		548,750		549,837		—
Non-Auto		219		13		—		232		151,016		151,248		—
Total Consumer		1,186		133		—		1,319		699,766		701,085		—
Total	$	37,342	$	1,081	$	7,091	$	45,514	$	7,183,896	$	7,229,410	$	33

30

March 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
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

December 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	8,789	$	1,624	$	1,700	$	12,113	$	1,152,698	$	1,164,811	$	141
Municipal		102		—		—		102		214,748		214,850		—
Total Commercial		8,891		1,624		1,700		12,215		1,367,446		1,379,661		141
Agricultural		850		246		4		1,100		83,790		84,890		—
Real Estate:
Construction & Development		8,887		2,115		1,856		12,858		950,300		963,158		863
Farm		1,024		195		—		1,219		343,735		344,954		—
Non-Owner Occupied CRE		3,565		—		—		3,565		824,404		827,969		—
Owner Occupied CRE		2,818		240		1,823		4,881		1,032,400		1,037,281		—
Residential		12,293		828		2,816		15,937		1,818,656		1,834,593		—
Total Real Estate		28,587		3,378		6,495		38,460		4,969,495		5,007,955		863
Consumer:
Auto		1,482		251		24		1,757		520,102		521,859		—
Non-Auto		341		51		—		392		154,034		154,426		—
Total Consumer		1,823		302		24		2,149		674,136		676,285		—
Total	$	40,151	$	5,550	$	8,223	$	53,924	$	7,094,867	$	7,148,791	$	1,004

* 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 troubled debt restructuring ("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, 2024 and 2023, respectively, loan modifications made to borrowers experiencing financial difficulty was insignificant.

31

Note 4 - Loans Held-for-Sale

Loans held-for-sale totaled $16,109,000, $11,996,000 and $14,253,000 at March 31, 2024 and 2023, and December 31, 2023, respectively. At March 31, 2024 and 2023, and December 31, 2023, $1,029,000, $230,000 and $3,176,000, 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.

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 3 in the fair value disclosures (see Note 9).

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, 2024:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	53,206	$	803	$	—
Forward mortgage-backed securities trades		70,000		—		91

March 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	58,706	$	827	$	—
Forward mortgage-backed securities trades		69,500		—		334

December 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	28,956	$	427	$	—
Forward mortgage-backed securities trades		35,000		—		288

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Note 6 – Borrowings

Borrowings consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Securities sold under agreements with customers to repurchase	$	307,297	$	608,299	$	381,928
Federal funds purchased		5,750		3,575		1,100
Other borrowings		21,053		21,053		21,053
Total	$	334,100	$	632,927	$	404,081

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, 2023, 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, 2024.

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.

Note 7 - Income Taxes

Income tax expense was $11,480,000 for the first quarter of 2024 as compared to $11,688,000 for the same period in 2023. The Company’s effective tax rates on pretax income were 17.70% and 18.19% for the first quarters of 2024 and 2023, 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 $978,000 at March 31, 2024, and $131,000 at March 31, 2023, and $615,000 at December 31, 2023, respectively, 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 to qualifying eligible projects over a sever year period. The Company's equity investments in the CDEs is amortized using the proportional amortization method and related tax credits are allocated to the Company. At March 31, 2024, March 31, 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023, the consolidated balance sheet of the Company included CDE investments in other assets of $25,411,000, $26,553,000, and $25,738,000, respectively.

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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, 2024, the Company had 1,617,290 shares of stock remaining for issuance under the plan. The 2021 Plan supersedes all prior stock option and restricted stock plans with shares previously reserved for issuance under such plans cancelled.

Restricted Stock Units

Under the 2021 Plan, the Company grants restricted stock units under compensation 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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		53,817		$	37.04		39,657		$	47.83
Grants		—			—		—			—
Vesting		—			—		—			—
Forfeited/expired		(599	)		33.89		(2,888	)		47.87
Balance at end of period		53,218		$	37.07		36,769		$	47.83

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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		75,227		$	40.24		47,082		$	48.00
Grants		—			—		—			—
Vesting		(20,532	)		48.91		—			—
Forfeited/expired		(686	)		35.61		(3,456	)		48.04
Balance at end of period		54,009		$	37.00		43,626		$	48.00

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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,
	2024				2023
	Restricted Stock Outstanding		Weighted Average Grant Date Fair Value		Restricted Stock Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		25,190	$	27.79		24,813		$	36.21
Grants		—		—		—			—
Vesting		—		—		(2,872	)		28.25
Forfeited/expired		—		—		(1,105	)		29.70
Balance at end of period		25,190	$	27.79		20,836		$	37.53

The total fair value of restricted stock vested for the three-months ended March 31, 2024 and 2023, was $650,000 and $98,000, respectively.

The Company recorded restricted stock unit, performance-based restricted stock unit and restricted stock award expense for employees of $469,000 and $358,000 for the three-months ended March 31, 2024 and 2023, respectively. The Company recorded director expense related to these restricted stock grants of $175,000 and $150,000, for the three-months ended March 31, 2024 and 2023, respectively.

As of March 31, 2024 and 2023, there were $2,514,000 and $2,576,000, 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 1.14 years and 1.17 years, respectively. At March 31, 2024 and 2023, and December 31, 2023, there was $111,000, $82,000 and $124,000, 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 grants from the 2021 Plan provided that 20% of the options granted vest and are exercisable after one year from the date of grant and the remaining options vest and are exercisable at a rate of 20% each year thereafter and have a 10-year term. Shares are issued under the 2012 Plan and the 2021 Plan from available authorized shares. An analysis of stock option activity for the three-months ended March 31, 2024 is presented in the table and narrative below:​​​​​​​

	Shares			Weighted- Average Ex. Price
Outstanding, December 31, 2023		1,552,249		$	30.45
Granted		—			—
Exercised		(82,614	)		20.77
Cancelled		(21,692	)		36.49
Outstanding, March 31, 2024		1,447,943			30.91
Exercisable, March 31, 2024		813,657		$	25.85

The options outstanding at March 31, 2024 had exercise prices ranging between $16.95 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 $485,000 and $444,000 for the three-months ended March 31, 2024 and 2023, respectively.

As of March 31, 2024, there was $4,723,000 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 1.44 years. The total fair value of shares vested during the three-months ended March 31, 2024 and 2023 was $46,000 and $15,000, respectively.

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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, 2024 and 2023, and the year ended December 31, 2023.

36

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, 2024	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	432,168	$	—		$	—	$	432,168
Obligations of state and political subdivisions		—		1,454,035			—		1,454,035
Corporate bonds		—		99,717			—		99,717
Residential mortgage-backed securities		—		2,299,277			—		2,299,277
Commercial mortgage-backed securities		—		368,906			—		368,906
Other securities		4,423		—			—		4,423
Total	$	436,591	$	4,221,935		$	—	$	4,658,526
Loans held-for-sale	$	—	$	15,080		$	—	$	15,080
IRLCs	$	—	$	—		$	803	$	803
Forward mortgage-backed securities trades	$	—	$	(91	)	$	—	$	(91	)

March 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	488,242	$	—		$	—	$	488,242
Obligations of states 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	)

December 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	482,234	$	—		$	—	$	482,234
Obligations of state and political subdivisions		—		1,497,157			—		1,497,157
Corporate bonds		—		100,471			—		100,471
Residential mortgage-backed securities		—		2,364,092			—		2,364,092
Commercial mortgage-backed securities		—		284,324			—		284,324
Other securities		4,484		—			—		4,484
Total	$	486,718	$	4,246,044		$	—	$	4,732,762
Loans held-for-sale	$	—	$	11,077		$	—	$	11,077
IRLCs	$	—	$	—		$	427	$	427
Forward mortgage-backed securities trades	$	—	$	(288	)	$	—	$	(288	)

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,
	2024		2023		2023
Unpaid principal balance on loans held-for-sale	$	14,701	$	11,416	$	10,757
Net unrealized gains on loans held-for-sale		379		350		320
Loans held-for-sale at fair value	$	15,080	$	11,766	$	11,077

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The following table summarizes the Company’s gains on sale and fees of mortgage loans for the three-months ended March 31, 2024 and 2023 (dollars in thousand):

	Three-Months Ended March 31,
	2024		2023
Realized gain on sale and fees on mortgage loans*	$	2,580	$	2,859
Change in fair value on loans held-for-sale and IRLCs		351		534
Change in forward mortgage-backed securities trades		197		(419	)
Total gain on sale of mortgage loans	$	3,128	$	2,974

* 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, 2024, March 31, 2023, or December 31, 2023. No significant credit losses were recognized on mortgage loans held-for-sale for the three-months ended March 31, 2024 and 2023.

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, 2024 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, 2024 and 2023.

At March 31, 2024 and 2023, and December 31, 2023, other real estate owned totaled $937,000, $175,000, and $483,000, respectively.

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.

38

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,
	2024						2023						2023
	Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Fair Value Hierarchy
Cash and due from banks	$	222,464		$	222,464		$	224,875		$	224,875		$	281,354		$	281,354		Level 1
Federal funds sold		12,300			12,300			—			—			—			—		Level 1
Interest-bearing demand deposits    in banks		365,397			365,397			221,336			221,336			255,237			255,237		Level 1
Available-for-sale securities		4,658,526			4,658,526			5,298,557			5,298,557			4,732,762			4,732,762		Levels 1 and 2
Loans held-for-investment, net of    allowance for credit losses		7,139,847			7,141,043			6,495,397			6,464,027			7,060,057			7,036,722		Level 3
Loans held-for-sale		16,109			16,109			11,996			12,018			14,253			14,378		Level 2
Accrued interest receivable		56,278			56,278			50,658			50,658			58,544			58,544		Level 2
Deposits with stated maturities		938,541			938,459			739,498			736,434			938,980			938,534		Level 2
Deposits with no stated maturities		10,351,267			10,351,267			10,196,920			10,196,920			10,199,320			10,199,320		Level 1
Repurchase Agreements		307,297			307,297			608,299			608,299			381,928			381,928		Level 2
Borrowings		26,803			26,803			24,628			24,628			22,153			22,153		Level 2
Accrued interest payable		8,362			8,362			3,617			3,617			10,215			10,215		Level 2
IRLCs		803			803			827			827			427			427		Level 3
Forward mortgage-backed securities    trades asset (liability)		(91	)		(91	)		(334	)		(334	)		(288	)		(288	)	Level 2

Note 10 - Subsequent Events

Effective April 22, 2024, First Financial Bank, N.A. and First Financial Trust and Asset Management Company, N.A. converted their charters to a Texas state banking association and a Texas chartered trust company, respectively. The Bank is now a Texas banking association chartered and regulated by the Texas Department of Banking and Trust Company is now a Texas trust company chartered and regulated by the Texas Department of Banking. The Bank will continue to be a member bank of the Federal Reserve system and maintain FDIC deposit insurance.

39

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Forward-Looking Statements

This Form 10-Q contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. When used in this Form 10-Q, words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “predict,” “project,” “could,” “may,” or “would” and similar expressions, as they relate to us or our management, identify forward-looking statements. These forward-looking statements are based on information currently available to our management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors, including, but not limited, to those discussed in Part I, Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, under the heading “Risk Factors,” and the following:

•general economic conditions, including our local, state and national real estate markets and employment trends;

•the effects of and changes in trade, monetary and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System (the “Federal Reserve Board”);

•effect of severe weather conditions, including hurricanes, tornadoes, flooding and droughts;

•volatility and disruption in national and international financial and commodity markets;

•government intervention in the U.S. financial system including the effects of recent legislative, tax, accounting and regulatory actions and reforms, including the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), the Jumpstart Our Business Startups Act, the Consumer Financial Protection Bureau (“CFPB”), the Inflation Reduction Act of 2022, the capital ratios of Basel III as adopted by the federal banking authorities and the Tax Cuts and Jobs Act;

•political or social unrest and economic instability;

•the ability of the federal government to address the national economy;

•changes in our competitive environment from other financial institutions and financial service providers;

•the effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board (“PCAOB”), the Financial Accounting Standards Board (“FASB”) and other accounting standard setters;

•effect of a pandemic, epidemic, or highly contagious disease, including the coronavirus (“COVID”), on our Company, the communities where we have our branches, the state of Texas and the United States, related to the economy and overall financial stability, including disruptions to supply channels and labor availability;

•government and regulatory responses to a pandemic, epidemic, or highly contagious disease, including COVID;

•the effect of changes in laws and regulations (including laws and regulations concerning taxes, banking, securities and insurance) with which we and our subsidiaries must comply;

•the costs, effects and results of regulatory examinations, investigations or reviews and the ability to obtain required regulatory approvals;

•changes in the demand for loans, including loans originated for sale in the secondary market;

•fluctuations in the value of collateral securing our loan portfolio and in the level of the allowance for credit losses;

•the accuracy of our estimates of future credit losses;

•the accuracy of our estimates and assumptions regarding the performance of our securities portfolio, including securities with a current unrealized loss;

•inflation, interest rate, market and monetary fluctuations;

•soundness of other financial institutions with which we have transactions;

•changes in consumer spending, borrowing and savings habits;

•changes in commodity prices (e.g., oil and gas, cattle, and wind energy);

•our ability to attract deposits, maintain and/or increase market share;

•changes in our liquidity position; including a result of a reduction in the amount of sources of liquidity we currently have;

•fluctuations in the market value and liquidity of the investment securities we have classified as held-for-sale ("HFS"), including the effects of changes in market interest rates;

•changes in the reliability of our vendors, internal control system or information systems;

•cyber-attacks on our technology information systems, including fraud from our customers and external third-party vendors;

•our ability to attract and retain qualified employees;

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•acquisitions and integration of acquired businesses;

•the possible impairment of goodwill and other intangibles associated with our acquisitions;

•consequences of continued bank mergers and acquisitions in our market area, resulting in fewer but much larger and stronger competitors;

•expansion of operations, including branch openings, new product offerings and expansion into new markets;

•changes in our compensation and benefit plans;

•acts of God or of war or terrorism;

•the impact of changes to the global climate and its effect on our operations and customers;

•potential risk of environmental liability associated with lending activities;

•the rise of Artificial Intelligence as a commonly used resource; and

•our success at managing the risk involved in the foregoing items.

In addition, financial markets and global supply chains may continue to be adversely affected by the current or anticipated impact of military conflict, including the current Russian invasion of Ukraine, the Israel-Palestine conflict and other world events, terrorism or other geopolitical events.

Such forward-looking statements reflect the current views of our management with respect to future events and are subject to these and other risks, uncertainties and assumptions relating to our operations, results of operations, growth strategies and liquidity. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this paragraph. We undertake no obligation to publicly update or otherwise revise any forward-looking statements, whether as a result of new information, future events or otherwise (except as required by law).

Introduction

As a financial holding company, we generate most of our revenue from interest on loans and investments, trust fees, gain on sale of mortgage loans and service charges and fees on deposit accounts. Our primary source of funding for our loans and investments are deposits held by our bank subsidiary, First Financial Bank. Our largest expenses are salaries and related employee benefits. We measure our performance by calculating our return on average assets, return on average equity, regulatory capital ratios, net interest margin and efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax equivalent basis and noninterest income.

The following discussion and analysis of operations and financial condition should be read in conjunction with the financial statements and accompanying footnotes included in Item 1 of this Form 10-Q as well as those included in the Company’s 2023 Annual Report on Form 10-K.

Critical Accounting Policies

We prepare consolidated financial statements based on generally accepted accounting principles (“GAAP”) and customary practices in the banking industry. These policies, in certain areas, require us to make significant estimates and assumptions.

We deem a policy critical if (i) the accounting estimate requires us to make assumptions about matters that are highly uncertain at the time we make the accounting estimate; and (ii) different estimates that reasonably could have been used in the current period, or changes in the accounting estimate that are reasonably likely to occur from period to period, would have a material impact on the financial statements.

We deem our most critical accounting policies to be (i) our allowance for credit losses and our provision for credit losses and (ii) our valuation of financial instruments. We have other significant accounting policies and continue to evaluate the materiality of their impact on our consolidated financial statements, but we believe these other policies either do not generally require us to make estimates and judgments that are difficult or subjective, or it is less likely they would have a material impact on our reported results for a given period. A discussion of (i) our allowance for credit losses and our provision for credit losses and (ii) our valuation of financial instruments is included in Note 1 to our Consolidated Financial Statements beginning on page 9.

Stock Repurchase

On July 27, 2021, the Company's Board of Directors authorized the repurchase of up to 5 million common shares through July 31, 2023. On July 25, 2023, the Company's Board of Directors renewed the prior authorization through July 31, 2024. 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. Under the current authorization, the Company has repurchased and retired 101,337 shares (all during September 2023) at an average price of $26.99 per share.

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Recent Developments

Effective April 22, 2024, First Financial Bank, N.A. and First Financial Trust and Asset Management Company, N.A. converted their charters to a Texas state banking association and a Texas chartered trust company, respectively. The Bank is now a Texas banking association chartered and regulated by the Texas Department of Banking and Trust Company is now a Texas trust company chartered and regulated by the Texas Department of Banking. The Bank will continue to be a member bank of the Federal Reserve system and maintain FDIC deposit insurance.

Results of Operations

Performance Summary. Net earnings for the first quarter of 2024 were $53.40 million compared to earnings of $52.57 million for the first quarter of 2023. Diluted earnings per share was $0.37 for both quarters ended March 31, 2024 and 2023, respectively.

The return on average assets was 1.62% for the first quarter of 2024, as compared to 1.65% for the first quarter of 2023. The return on average equity was 14.43% for the first quarter of 2024 as compared to 16.32% for the first quarter of 2023.

Net Interest Income. Net interest income is the difference between interest income on earning assets and interest expense on liabilities incurred to fund those assets. Our earning assets consist primarily of loans and investment securities. Our liabilities to fund those assets consist primarily of noninterest-bearing and interest-bearing deposits.

Tax-equivalent net interest income was $102.82 million for the first quarter of 2024, as compared to $99.42 million for the same period last year. The increase in 2024 tax equivalent net interest income compared to 2023 was largely attributable to the change in the mix of interest earning assets primarily derived from an increase in average loans offset by a decrease in taxable and tax-exempt investment securities. Additionally, the rates received on loans continued to increase along with the rates paid on deposits and borrowings. Average earning assets were $12.37 billion for the first quarter of 2024, as compared to $12.07 billion during the first quarter of 2023. The increase of $295.97 million in average earning assets in 2024 when compared to 2023 was primarily a result of (i) an increase in loans of $705.09 million, offset by (ii) a decrease in tax-exempt securities of $316.03 million, and (iii) a decrease in taxable investment securities of $295.93 million, when compared to the three-months ended March 31, 2023 average balances. Average interest-bearing liabilities were $8.33 billion for the first quarter of 2024, as compared to $7.71 billion in the same period in 2023. The yield on earning assets increased 76 basis points while the rate paid on interest-bearing liabilities increased 105 basis points for the first quarter of 2024 compared to the first quarter of 2023.

Table 1 allocates the change in tax-equivalent net interest income between the amount of change attributable to volume and to rate.

Table 1 - Changes in Interest Income and Interest Expense (dollars in thousands):

	Three-Months Ended March 31, 2024 Compared to Three-Months Ended March 31, 2023
	Change Attributable to						Total
	Volume			Rate			Change
Short-term investments	$	2,288		$	776		$	3,064
Taxable investment securities		(1,675	)		845			(830	)
Tax-exempt investment securities (1)		(2,301	)		(648	)		(2,949	)
Loans (1) (2)		9,704			18,440			28,144
Interest income		8,016			19,413			27,429
Interest-bearing deposits		2,456			20,982			23,438
Repurchase agreements		(1,371	)		888			(483	)
Borrowings		650			426			1,076
Interest expense		1,735			22,296			24,031
Net interest income	$	6,281		$	(2,883	)	$	3,398

(1)Computed on a tax-equivalent basis assuming a marginal tax rate of 21%.

(2)Nonaccrual loans are included in loans.

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The net interest margin, on a tax equivalent basis, was 3.34% for the first quarters of 2024 and 2023, respectively. We experienced downward pressure on our net interest margin during the past year primarily due to (i) the effects of the Federal Reserve Board's accelerated rate of raising interest rates in 2022 and 2023, which was preceded by the extended period of historically low levels of short-term interest rates, and (ii) the shift in the mix of interest-earning assets and interest-bearing deposits. The Federal Reserve began aggressively increasing interest rates in March 2022 and continuing into 2023 with increases of 25 basis points in February, March, May, and July 2023, respectively, resulting in a target rate range of 5.25% to 5.50% at March 31, 2024.

Loan rates on variable loans have increased as the majority of such loans are indexed to the applicable prime rate (currently 8.50% at March 31, 2024), subject to underlying floors. With the latest increase in the federal funds rate, the majority of variable rate loans have increased (see additional discussion beginning on page 49).

We have approximately $965 million of municipal and related deposits which are indexed to short-term treasury rates which have continued to increase with the changes in the applicable rate index. Average municipal and related deposits totaled $1.55 billion and $1.48 billion for the three-months ended March 31, 2024 and 2023, respectively, with an average rate paid of 3.87% and 2.39%, for the respective three-months then ended.

The net interest margin, which measures tax-equivalent net interest income as a percentage of average earning assets, is illustrated in Table 2.

Table 2 - Average Balances and Average Yields and Rates (dollars in thousands, except percentages):

	Three-Months Ended March 31,
	2024								2023
	Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate
Assets
Short-term investments (1)	$	348,892		$	4,714		5.43	%	$	146,049		$	1,650		4.58	%
Taxable investment securities (2)		3,376,324			19,952		2.36			3,672,257			20,782		2.26
Tax-exempt investment securities (2)(3)		1,434,505			9,794		2.73			1,750,533			12,743		2.91
Loans (3)(4)		7,205,424			117,608		6.56			6,500,332			89,464		5.58
Total earning assets		12,365,145		$	152,068		4.95	%		12,069,171		$	124,639		4.19	%
Cash and due from banks		246,781								242,210
Bank premises and equipment, net		151,316								153,326
Other assets		240,976								228,518
Goodwill and other intangible assets, net		314,549								315,410
Allowance for credit losses		(88,737	)							(76,122	)
Total assets	$	13,230,030							$	12,932,513
Liabilities and Shareholders’ Equity
Interest-bearing deposits	$	7,878,094		$	45,250		2.31	%	$	7,080,518		$	21,812		1.25	%
Repurchase agreements		317,439			2,562		3.25			577,314			3,045		2.14
Borrowings		132,963			1,441		4.36			47,823			365		3.10
Total interest-bearing liabilities		8,328,496		$	49,253		2.38	%		7,705,655		$	25,222		1.33	%
Noninterest-bearing deposits		3,346,757								3,860,472
Other liabilities		66,134								60,028
Total liabilities		11,741,387								11,626,155
Shareholders’ equity		1,488,643								1,306,358
Total liabilities and shareholders’ equity	$	13,230,030							$	12,932,513
Net interest income (tax equivalent)				$	102,815							$	99,417
Rate Analysis:
Interest income/earning assets							4.95	%							4.19	%
Interest expense/earning assets							(1.61	)							(0.85	)
Net interest margin							3.34	%							3.34	%

(1)Short-term investments are comprised of federal funds sold, interest-bearing deposits in banks and interest-bearing time deposits in banks.

(2)Average balances include unrealized gains and losses on available-for-sale securities.

(3)Includes tax equivalent yield adjustment of approximately $2.57 million and $3.13 million in the first quarters of 2024 and 2023, respectively, using an effective tax rate of 21% for both periods.

(4)Includes nonaccrual loans.

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Noninterest Income. Noninterest income for the first quarter of 2024 was $29.38 million compared to $28.01 million in the same quarter of 2023. Trust fees increased to $11.38 million for the first quarter of 2024 compared to $9.85 million for the first quarter of 2023, driven by the increase in market value of trust assets managed to $10.15 billion at March 31, 2024, compared to $9.10 billion at March 31, 2023. Service charges on deposits increased to $6.25 million for the first quarter of 2024 compared with $6.04 million for the first quarter of 2023, driven by the growth of over 2,000 net new accounts opened during the first quarter of 2024. Mortgage related income increased to $3.13 million for the first quarter of 2024 compared to $2.97 million in the first quarter of 2023 due to a slight increase in mortgage loans originated.

Debit card fees are charges that merchants pay to us and other card-issuing banks for processing electronic payment transactions. Debit card fees consist of income from debit card usage, point of sale income for debit card transactions and ATM service fees. Federal Reserve Board rules applicable to financial institutions that have assets of $10 billion or more provide that the maximum permissible interchange fee for an electronic debit transaction is limited to the sum of 21 cents per transaction plus 5 basis points multiplied by the value of the transaction.

Table 3 - Noninterest Income (dollars in thousands):

	Three-Months Ended March 31,
	2024		Increase (Decrease)			2023
Trust fees	$	11,379	$	1,534		$	9,845
Service charges on deposit accounts		6,246		210			6,036
Debit card fees		4,891		(45	)		4,936
Credit card fees		631		22			609
Gain on sale and fees on mortgage loans		3,128		154			2,974
Net gain on sale of available-for-sale securities		—		(12	)		12
Net gain (loss) on sale of foreclosed assets		—		(34	)		34
Net gain (loss) on sale of assets		—		(930	)		930
Interest on loan recoveries		555		209			346
Other:
Check printing fees		11		(9	)		20
Safe deposit rental fees		263		(17	)		280
Credit life fees		227		86			141
Brokerage commissions		393		35			358
Wire transfer fees		438		51			387
Miscellaneous income		1,221		122			1,099
Total other		2,553		268			2,285
Total Noninterest Income	$	29,383	$	1,376		$	28,007

Noninterest Expense. Total noninterest expense for the first quarter of 2024 was $63.94 million, compared to $57.26 million for the same period of 2023. An important measure in determining whether a financial institution effectively manages noninterest expense is the efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax-equivalent basis and noninterest income. Lower ratios indicate better efficiency since more income is generated with a lower noninterest expense total. Our efficiency ratio was 48.37% for the first quarter of 2024 compared to 44.93% for the same quarter in 2023.

Salaries, commissions and employee benefits for the first quarter of 2024 totaled $36.68 million, compared to $31.46 million for the same period in 2023. The net increase was primarily a result of merit-based and market driven pay increases and an increase of $1.65 million in profit sharing expense, an increase of $1.29 million in medical insurance expense and an increase of $1.18 million in officer incentive accruals.

All other categories of noninterest expense for the first quarter of 2024 totaled $27.26 million, compared to $25.80 million in the same quarter a year ago. Noninterest expense, excluding salary related costs, for the three-months ended March 31, 2024 increased largely due to increases in software amortization and FDIC insurance fees. An additional $440 thousand was accrued in the first quarter of 2024 for the FDIC special assessment over the Company's regular accrual.

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Table 4 - Noninterest Expense (dollars in thousands):

	Three-Months Ended March 31,
	2024		Increase (Decrease)			2023
Salaries, commissions and incentives (excluding mortgage)	$	25,256	$	1,926		$	23,330
Mortgage salaries and incentives		1,999		102			1,897
Medical		3,605		1,286			2,319
Profit sharing		1,680		1,650			30
401(k) match expense		989		20			969
Payroll taxes		2,200		86			2,114
Stock based compensation		954		152			802
Total salaries and employee benefits		36,683		5,222			31,461
Net occupancy expense		3,470		40			3,430
Equipment expense		2,237		110			2,127
FDIC insurance premiums		1,965		311			1,654
Debit card expense		3,058		(141	)		3,199
Professional and service fees		2,396		31			2,365
Printing, stationery and supplies		447		(263	)		710
Operational and other losses		1,154		223			931
Software amortization and expense		3,005		694			2,311
Amortization of intangible assets		157		(71	)		228
Other:
Data processing fees		618		123			495
Postage		385		12			373
Advertising		716		123			593
Correspondent bank service charges		240		25			215
Telephone		845		15			830
Public relations and business development		739		(143	)		882
Directors’ fees		699		33			666
Audit and accounting fees		409		(211	)		620
Legal fees and other related costs		262		20			242
Regulatory exam fees		315		4			311
Travel		383		(62	)		445
Courier expense		307		29			278
Other real estate owned		52		52			—
Other miscellaneous expense		3,398		508			2,890
Total other		9,368		528			8,840
Total Noninterest Expense	$	63,940	$	6,684		$	57,256

Balance Sheet Review

Loans. Our portfolio is comprised of loans made to businesses, professionals, individuals, and farm and ranch operations located in the primary trade areas served by our subsidiary bank. As of March 31, 2024, total loans held-for-investment were $7.23 billion, an increase of $80.62 million, as compared to December 31, 2023.

As compared to year-end 2023 balances, total real estate loans increased $29.96 million, total consumer loans increased $24.80 million, total commercial loans increased $22.87 million, and agricultural loans increased $2.99 million. Loans averaged $7.21 billion for the first quarter of 2024, an increase of $705.09 million over the prior year first quarter average balances.

Our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. This segmentation allows for a more precise pooling of loans with similar credit risk characteristics and credit monitor procedures for the Company’s calculation of its allowance for credit losses.

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Table 5 outlines the composition of the Company’s held-for-investment loans by portfolio segment.

Table 5 - Composition of Loans Held-for-Investment (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Commercial:
C&I	$	1,191,516	$	954,686	$	1,164,811
Municipal		211,013		221,379		214,850
Total Commercial		1,402,529		1,176,065		1,379,661
Agricultural		87,882		77,017		84,890
Real Estate:
Construction & Development		921,773		921,190		963,158
Farm		311,002		307,706		344,954
Non-Owner Occupied CRE		853,721		737,117		827,969
Owner Occupied CRE		1,032,845		1,043,018		1,037,281
Residential		1,918,573		1,628,841		1,834,593
Total Real Estate		5,037,914		4,637,872		5,007,955
Consumer:
Auto		549,837		537,410		521,859
Non-Auto		151,248		147,851		154,426
Total Consumer		701,085		685,261		676,285
Total	$	7,229,410	$	6,576,215	$	7,148,791

Loans held-for-sale, consisting of secondary market mortgage loans, totaled $16.11 million, $12.00 million, and $14.25 million at March 31, 2024 and 2023, and December 31, 2023, respectively. At March 31, 2024 and 2023, and December 31, 2023, $1.03 million, $230 thousand and $3.18 million, respectively, are valued using the lower of cost or fair value, and the remaining amounts are valued under the fair value option.

The following tables summarize maturity information of our loan portfolio as of March 31, 2024. The tables also presents the portion of loans that have fixed interest rates or variable interest rates that fluctuate over the life of the loans in accordance with changes in an interest rate index.

Maturity Distribution and Interest Sensitivity of Loans at March 31, 2024 (dollars in thousands):

Total Loans Held-for-Investment:	Due in One Year or Less			After One but Within Five Years			After Five but Within Fifteen Years			After Fifteen Years			Total
Commercial:
C&I	$	449,898		$	627,768		$	88,901		$	24,949		$	1,191,516
Municipal		2,911			55,578			99,154			53,370			211,013
Total Commercial		452,809			683,346			188,055			78,319			1,402,529
Agricultural		68,706			18,439			737			—			87,882
Real Estate:
Construction & Development		386,592			210,092			213,262			111,827			921,773
Farm		23,894			42,564			156,871			87,673			311,002
Non-Owner Occupied CRE		110,964			278,773			338,653			125,331			853,721
Owner Occupied CRE		48,282			295,911			477,463			211,189			1,032,845
Residential		142,525			153,776			751,148			871,124			1,918,573
Total Real Estate		712,257			981,116			1,937,397			1,407,144			5,037,914
Consumer:
Auto		6,864			542,055			918			—			549,837
Non-Auto		32,736			91,640			20,867			6,005			151,248
Total Consumer		39,600			633,695			21,785			6,005			701,085
Total	$	1,273,372		$	2,316,596		$	2,147,974		$	1,491,468		$	7,229,410
% of Total Loans		17.61	%		32.05	%		29.71	%		20.63	%		100.00	%

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Loans with fixed interest rates:	Due in One Year or Less			After One but Within Five Years			After Five but Within Fifteen Years			After Fifteen Years			Total
Commercial:
C&I	$	77,190		$	351,662		$	12,087		$	—		$	440,939
Municipal		2,870			54,735			68,706			8,094			134,405
Total Commercial		80,060			406,397			80,793			8,094			575,344
Agricultural		6,362			12,560			124			—			19,046
Real Estate:
Construction & Development		160,461			153,970			38,129			6,012			358,572
Farm		6,850			30,494			92,427			3,170			132,941
Non-Owner Occupied CRE		36,959			174,635			53,511			4,077			269,182
Owner Occupied CRE		25,670			170,521			30,990			160			227,341
Residential		61,252			120,629			470,402			109,871			762,154
Total Real Estate		291,192			650,249			685,459			123,290			1,750,190
Consumer:
Auto		6,864			542,055			918			—			549,837
Non-Auto		29,317			90,410			20,562			3,243			143,532
Total Consumer		36,181			632,465			21,480			3,243			693,369
Total	$	413,795		$	1,701,671		$	787,856		$	134,627		$	3,037,949
% of Total Loans		5.72	%		23.54	%		10.90	%		1.86	%		42.02	%

Loans with variable interest rates:	Due in One Year or Less			After One but Within Five Years			After Five but Within Fifteen Years			After Fifteen Years			Total
Commercial:
C&I	$	372,708		$	276,106		$	76,814		$	24,949		$	750,577
Municipal		41			843			30,448			45,276			76,608
Total Commercial		372,749			276,949			107,262			70,225			827,185
Agricultural		62,344			5,879			613			—			68,836
Real Estate:
Construction & Development		226,131			56,122			175,133			105,815			563,201
Farm		17,044			12,070			64,444			84,503			178,061
Non-Owner Occupied CRE		74,005			104,138			285,142			121,254			584,539
Owner Occupied CRE		22,612			125,390			446,473			211,029			805,504
Residential		81,273			33,147			280,746			761,253			1,156,419
Total Real Estate		421,065			330,867			1,251,938			1,283,854			3,287,724
Consumer:
Auto		—			—			—			—			—
Non-Auto		3,419			1,230			305			2,762			7,716
Total Consumer		3,419			1,230			305			2,762			7,716
Total	$	859,577		$	614,925		$	1,360,118		$	1,356,841		$	4,191,461
% of Total Loans		11.89	%		8.51	%		18.81	%		18.77	%		57.98	%

Of the $4.19 billion of variable interest rate loans shown above, loans totaling $1.64 billion mature or reprice over the next twelve months. Of this amount, approximately $1.31 billion will reprice immediately upon changes in the underlying index rate (primarily U.S. prime rate) with the remaining $334 million being subject to floors above or ceilings below the current index.

Asset Quality. Our loan portfolio is subject to periodic reviews by our centralized independent loan review group as well as periodic examinations by bank regulatory agencies. Loans are placed on nonaccrual status when, in the judgment of management, the collectability of principal or interest under the original terms becomes doubtful. Nonaccrual, past due 90 days or more and still accruing, and foreclosed assets were $37.20 million at March 31, 2024, as compared to $24.39 million at March 31, 2023 and $35.10 million at December 31, 2023. As a percent of loans held-for-investment and foreclosed assets, these assets were 0.51% at March 31, 2024, 0.37% at March 31, 2023, and 0.49% at December 31, 2023. As a percent of total assets, these assets were 0.28% at March 31, 2024, as compared to 0.19% at March 31, 2023 and 0.27% at December 31, 2023, respectively. We believe the level of these assets to be manageable and are not aware of any material classified credits not properly disclosed as nonperforming at March 31, 2024.

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Table 6 – Nonaccrual, Past Due 90 Days or More and Still Accruing, and Foreclosed Assets (dollars in thousands, except percentages):

	March 31,						December 31,
	2024			2023			2023
Nonaccrual loans	$	36,157		$	24,171		$	33,609
Loans still accruing and past due 90 days or more		33			22			1,004
Total nonperforming loans		36,190			24,193			34,613
Foreclosed assets		1,014			196			483
Total nonperforming assets	$	37,204		$	24,389		$	35,096
As a % of loans held-for-investment and foreclosed assets		0.51	%		0.37	%		0.49	%
As a % of total assets		0.28			0.19			0.27

We record interest payments received on nonaccrual loans as reductions of principal. Prior to the loans being placed on nonaccrual, we recognized interest income on these loans of approximately $913 thousand for the year ended December 31, 2023. If interest on these loans had been recognized on a full accrual basis during the year ended December 31, 2023, such income would have been approximately $3.22 million. Such amounts for the 2024 and 2023 interim periods were not significant.

Allowance for Credit Losses. The allowance for credit losses is the amount we determine as of a specific date to be appropriate to absorb current expected credit losses on existing loans. For a discussion of our methodology, see our accounting policies in Note 1 to the Consolidated Financial Statements (unaudited).

The provision for loan losses of $1.26 million for the three-months ended March 31, 2024 is combined with the reversal of provision for unfunded commitments of $448 thousand and reported in the net aggregate of $808 thousand under the provision for credit losses in the consolidated statements of earnings for the three-months ended March 31, 2024.

The provision for loan losses of $4.71 million for the three-months ended March 31, 2023 is combined with the reversal of provision for unfunded commitments of $1.93 million and reported in the aggregate of $2.78 million under the provision for credit losses in the consolidated statements of earnings for the three-months ended March 31, 2023.

As a percent of average loans, net loan charge-offs were 0.02% for the first quarter of 2024, as compared to net loan recoveries of 0.02% for the first quarter of 2023. The allowance for credit losses as a percent of loans held-for-investment was 1.24% as of March 31, 2024, as compared to 1.23% as of March 31, 2023 and 1.24% as of December 31, 2023, respectively.

Table 7 - Loan Loss Experience and Allowance for Credit Losses (dollars in thousands, except percentages):

	Three-Months Ended March 31,
	2024			2023
Allowance for credit losses at period-end	$	89,562		$	80,818
Loans held-for-investment at period-end		7,229,410			6,576,215
Average loans for period		7,205,424			6,500,332
Net charge-offs (recoveries)/average    loans (annualized)		0.02	%		(0.02	)%
Allowance for loan losses/period-end    loans held-for-investment		1.24	%		1.23	%
Allowance for loan losses/nonaccrual    loans, past due 90 days still accruing    and restructured loans		247.48	%		334.06	%

Interest-Bearing Demand Deposits in Banks. The Company had interest-bearing deposits in banks of $365.40 million at March 31, 2024 compared to $221.34 million at March 31, 2023 and $255.24 million at December 31, 2023, respectively. At March 31, 2024, interest-bearing deposits in banks included $361.98 million maintained at the Federal Reserve Bank of Dallas and $3.42 million on deposit with the FHLB.

Available-for-Sale Securities. At March 31, 2024, securities with a fair value of $4.66 billion were classified as securities available-for-sale. As compared to December 31, 2023, the available-for-sale portfolio at March 31, 2024 reflected (i) a decrease of $50.07 million in U.S. Treasury securities, (ii) a decrease of $43.12 million in obligations of states and political subdivisions, (iv) an increase of $19.77 million in mortgage-backed securities, and (iv) a decrease of $815 thousand in corporate bonds and other securities. Fluctuations in the available-for-sale securities portfolio balances were primarily driven by calls and maturities, and changes in unrealized losses during the first three months of 2024. Our mortgage related securities are backed by GNMA, FNMA or FHLMC or are collateralized by securities backed by these agencies.

See the below table and Note 2 to the Consolidated Financial Statements (unaudited) for additional disclosures relating to the maturities and fair values of the investment portfolio at March 31, 2024 and 2023, and December 31, 2023.

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Table 8 - Maturities and Yields of Available-for-Sale Securities Held at March 31, 2024 (dollars in thousands, except percentages):

	Maturing by Contractual Maturity
	One Year or Less					After One Year Through Five Years					After Five Years Through Ten Years					After Ten Years					Total
Available-for-Sale:	Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield
U.S. Treasury securities	$	223,464		1.93	%	$	208,704		1.80	%	$	—		—	%	$	—		—	%	$	432,168		1.86	%
Obligations of states and    political subdivisions		13,054		4.17			371,610		2.98			732,817		2.44			336,554	2.77				1,454,035		2.67
Corporate bonds and other    securities		4,423		2.95			77,064		2.75			22,653		1.76			—		—			104,140		2.54
Mortgage-backed securities		96,882		2.50			631,107		2.58			1,370,873		2.00			569,321		2.28			2,668,183		2.21
Total	$	337,823		2.19	%	$	1,288,485		2.58	%	$	2,126,343		2.15	%	$	905,875		2.46	%	$	4,658,526		2.33	%

All yields are computed on a tax-equivalent basis assuming a marginal tax rate of 21%. Yields on available-for-sale securities are based on amortized cost. Maturities of mortgage-backed securities are based on contractual maturities and could differ due to prepayments of underlying mortgages. Maturities of other securities are reported at the earlier of maturity date or call date.

As of March 31, 2024, the investment portfolio had an overall tax equivalent yield of 2.33%, a weighted average life of 7.09 years and modified duration of 5.93 years.

Deposits. Deposits held by our subsidiary bank represent our primary source of funding. Total deposits were $11.29 billion as of March 31, 2024, as compared to $10.94 billion as of March 31, 2023 and $11.14 billion as of December 31, 2023.

Table 9 provides a breakdown of average deposits and rates paid over the three month periods ended March 31, 2024 and 2023, respectively.

Table 9 - Composition of Average Deposits (dollars in thousands, except percentages):

	Three-Months Ended March 31,
	2024					2023
	Average Balance		Average Rate			Average Balance		Average Rate
Noninterest-bearing deposits	$	3,346,757	—%			$	3,860,472	—%
Interest-bearing deposits:
Interest-bearing checking		3,884,772		2.10			3,487,828		0.99
Savings and money market accounts		3,059,096		2.17			2,945,372		1.32
Time deposits under $250,000		594,781		3.55			407,687		2.01
Time deposits of $250,000 or more		339,445		3.89			239,631		2.88
Total interest-bearing deposits		7,878,094		2.31	%		7,080,518		1.25	%
Total average deposits	$	11,224,851				$	10,940,990
Total cost of deposits				1.62	%				0.81	%

The estimated amount of uninsured and uncollateralized deposits including related accrued and unpaid interest is approximately $5.28 billion as of March 31, 2024.

Borrowings. Included in borrowings were federal funds purchased, securities sold under repurchase agreements, advances from the FHLB and other borrowings of $334.10 million, $632.93 million and $404.08 million at March 31, 2024 and 2023, and December 31, 2023, respectively. Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds for which we pledge certain securities that have a fair value equal to at least the amount of the short-term borrowings. The average balances of securities sold under repurchase agreements were $317.44 million and $577.31 million for the first quarters of 2024 and 2023, respectively. The average rates paid on securities sold under repurchase agreements were 3.25% and 2.14% for the first quarters of 2024 and 2023, respectively. The average balance of federal funds purchased, advances from the FHLB and other borrowings were $132.96 million and $47.82 million in the first quarters of 2024 and 2023, respectively. The weighted average interest rates paid on these borrowings were 4.36% and 3.10% for the first quarters of 2024 and 2023, respectively.

Interest Rate Risk

Interest rate risk results when the maturity or repricing intervals of interest-earning assets and interest-bearing liabilities are different. Our exposure to interest rate risk is managed primarily through our strategy of selecting the types and terms of interest-earning assets and interest-bearing liabilities that generate favorable earnings while limiting the potential negative effects of changes in market interest rates. We use no off-balance-sheet financial instruments to manage interest rate risk.

Our subsidiary bank has an asset liability management committee that monitors interest rate risk and compliance with investment policies. The subsidiary bank utilizes an earnings simulation model as the primary quantitative tool in measuring the amount of interest rate risk associated with changing market rates. The model quantifies the effects of various interest rate scenarios on projected net interest income and net income over the next

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twelve months. The model measures the impact on net interest income relative to a base case scenario of hypothetical fluctuations in interest rates over the next twelve months. These simulations incorporate assumptions regarding balance sheet growth and mix, pricing and the re-pricing and maturity characteristics of the existing and projected balance sheet.

The following analysis depicts the estimated impact on net interest income of immediate changes in interest rates at the specified levels for the periods presented.

	Percentage change in net interest income:
Change in interest rates:	March 31,		December 31,
(in basis points)	2024	2023	2023
+400	8.69%	3.63%	7.17%
+300	6.46%	2.64%	5.36%
+200	4.57%	2.33%	3.87%
+100	2.43%	1.79%	2.11%
-100	(3.35)%	(2.12)%	(2.72)%
-200	(6.83)%	(4.60)%	(5.54)%
-300	(9.86)%	(7.53)%	(8.70)%
-400	(11.10)%	(7.79)%	(9.65)%

The results for the net interest income simulations as of March 31, 2024 and 2023, and December 31, 2023 resulted in an asset sensitive position. These are good faith estimates and assume that the composition of our interest sensitive assets and liabilities existing at each year-end will remain constant over the relevant twelve-month measurement period and that changes in market interest rates are instantaneous and sustained across the yield curve regardless of duration of pricing characteristics on specific assets or liabilities. Also, this analysis does not contemplate any actions that we might undertake in response to changes in market interest rates. We believe these estimates are not necessarily indicative of what actually could occur in the event of immediate interest rate increases or decreases of this magnitude. As interest-bearing assets and liabilities reprice in different time frames and proportions to market interest rate movements, various assumptions must be made based on historical relationships of these variables in reaching any conclusion. Since these correlations are based on competitive and market conditions, we anticipate that our future results will likely be different from the foregoing estimates, and such differences could be material.

Should we be unable to maintain a reasonable balance of maturities and repricing of our interest-earning assets and our interest-bearing liabilities, we could be required to dispose of our assets in an unfavorable manner or pay a higher than market rate to fund our activities. Our asset liability management committee oversees and monitors this risk.

The fair value of our investment securities classified as available-for-sale totaled $4.66 billion at March 31, 2024. During the three months ended March 31, 2024, the corresponding unrealized loss before taxes on the portfolio of $510.92 million at December 31, 2023, changed to an unrealized loss before taxes of $558.99 million at March 31, 2024, which is recorded net of taxes in accumulated other comprehensive earnings (loss) in shareholders' equity. The unrealized gains or losses, net of taxes, on the portfolio are excluded from the calculation of all regulatory capital ratios. The changes in the fair value were driven by changes in interest rates based on expected actions by the Federal Reserve Board and other market conditions. The overall valuation of the portfolio is most correlated to the 5-year U.S. Treasury rates based on the composition and duration of the portfolio. At March 31, 2024, the 5-year U.S. Treasury rate was 4.22% compared to 3.84% at December 31, 2023, representing a 38 basis point increase during the first three months of 2024. As of March 31, 2024, an increase of 100 basis points in the 5-year U.S. Treasury rate would result in an increase to unrealized losses by approximately $232 million before taxes, while a 100 basis point decrease in the same rate would result in a decrease to unrealized losses by approximately $196 million before taxes. We believe that we have the ability to hold these securities based on our overall liquidity and intent to hold the portfolio.

Capital and Liquidity

Capital. We evaluate capital resources by our ability to maintain adequate regulatory capital ratios to do business in the banking industry. Issues related to capital resources arise primarily when we are growing at an accelerated rate but not retaining a significant amount of our profits or when we experience significant asset quality deterioration.

Total shareholders’ equity was $1.49 billion, or 11.31% of total assets at March 31, 2024, as compared to $1.37 billion, or 10.55% of total assets at March 31, 2023, and $1.50 billion, or 11.44% of total assets at December 31, 2023. Included in shareholders' equity at March 31, 2024, and 2023, and December 31, 2023 were $441.23 million, $458.25 million and $403.30 million, respectively, in unrealized losses on investment securities available-for-sale, net of related income taxes, although such amount is excluded from and does not impact regulatory capital. For the first quarter of 2024, total shareholders’ equity averaged $1.49 billion, or 11.25% of average assets, as compared to $1.31 billion, or 10.10% of average assets, during the same period in 2023.

Banking regulators measure capital adequacy by means of the risk-based capital ratios and the leverage ratio under the Basel III rules and prompt corrective action regulations. The risk-based capital rules provide for the weighting of assets and off-balance-sheet commitments and contingencies according to prescribed risk categories. Regulatory capital is then divided by risk-weighted assets to determine the risk-adjusted capital ratios. The leverage ratio is computed by dividing shareholders’ equity less intangible assets by quarter-to-date average assets less intangible assets.

Beginning in January 2015, under the Basel III rules, the implementation of the capital conservation buffer was effective for the Company starting at the 0.625% level and increasing 0.625% each year thereafter, until it reached 2.50% on January 1, 2019. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure

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to meet the amount of the buffer will result in restrictions on the Company’s ability to make capital distributions, including dividend payments and stock repurchases, and to pay discretionary bonuses to executive officers.

As of March 31, 2024 and 2023, and December 31, 2023, we had a total risk-based capital ratio of 19.70%, 19.79% and 19.62%, a Tier 1 capital to risk-weighted assets ratio of 18.60%, 18.68% and 18.50%, a common equity Tier 1 to risk-weighted assets ratio of 18.60%, 18.68% and 18.50% and a Tier 1 leverage ratio of 12.12%, 11.53% and 12.06%, respectively. The regulatory capital ratios as of March 31, 2024 and 2023, and December 31, 2023 were calculated under Basel III rules.

The regulatory capital ratios of the Company and Bank under the Basel III regulatory capital framework are as follows:

	Actual					Minimum Capital Required-Basel III					Required to be Considered Well- Capitalized
As of March 31, 2024:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	1,729,051		19.70	%	$	921,517		10.50	%	$	877,635		10.00	%
First Financial Bank	$	1,559,420		17.82	%	$	919,106		10.50	%	$	875,339		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,632,034		18.60	%	$	745,990		8.50	%	$	526,581		6.00	%
First Financial Bank	$	1,462,403		16.71	%	$	744,038		8.50	%	$	700,271		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,632,034		18.60	%	$	614,344		7.00	%	$	—	N/A
First Financial Bank	$	1,462,403		16.71	%	$	612,737		7.00	%	$	568,970		6.50	%
Leverage Ratio:
Consolidated	$	1,632,034		12.12	%	$	351,054		4.00	%	$	—	N/A
First Financial Bank	$	1,462,403		10.91	%	$	350,136		4.00	%	$	437,670		5.00	%

	Actual					Minimum Capital Required-Basel III					Required to be Considered Well- Capitalized
As of March 31, 2023:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	1,620,432		19.79	%	$	859,545		10.50	%	$	818,615		10.00	%
First Financial Bank	$	1,495,532		18.31	%	$	857,688		10.50	%	$	816,846		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,529,217		18.68	%	$	695,822		8.50	%	$	491,169		6.00	%
First Financial Bank	$	1,404,316		17.19	%	$	694,319		8.50	%	$	653,477		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,529,217		18.68	%	$	573,030		7.00	%	$	—	N/A
First Financial Bank	$	1,404,316		17.19	%	$	571,792		7.00	%	$	530,950		6.50	%
Leverage Ratio:
Consolidated	$	1,529,217		11.53	%	$	327,446		4.00	%	$	—	N/A
First Financial Bank	$	1,404,316		10.63	%	$	326,738		4.00	%	$	408,423		5.00	%

	Actual					Minimum Capital Required Basel III					Required to be Considered Well- Capitalized
As of December 31, 2023:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	1,697,999		19.62	%	$	908,870		10.50	%	$	865,590		10.00	%
First Financial Bank	$	1,518,365		17.59	%	$	906,541		10.50	%	$	863,372		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,601,361		18.50	%	$	735,752		8.50	%	$	519,354		6.00	%
First Financial Bank	$	1,421,727		16.47	%	$	733,866		8.50	%	$	690,698		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	1,601,361		18.50	%	$	605,913		7.00	%		—	N/A
First Financial Bank	$	1,421,727		16.47	%	$	604,361		7.00	%	$	561,192		6.50	%
Leverage Ratio:
Consolidated	$	1,601,361		12.06	%	$	346,236		4.00	%		—	N/A
First Financial Bank	$	1,421,727		10.75	%	$	345,349		4.00	%	$	431,686		5.00	%

In connection with the adoption of the Basel III regulatory capital framework, our subsidiary bank made the election to continue to exclude accumulated other comprehensive income from available-for-sale securities (“AOCI”) from capital in connection with its quarterly financial filing and, in effect, to retain the AOCI treatment under the prior capital rules.

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Liquidity. Liquidity is our ability to meet cash demands as they arise. Such needs can develop from loan demand, deposit withdrawals or acquisition opportunities. Potential obligations resulting from the issuance of standby letters of credit and commitments to fund future borrowings to our loan customers are other factors affecting our liquidity needs. Many of these obligations and commitments are expected to expire without being drawn upon; therefore, the total commitment amounts do not necessarily represent future cash requirements affecting our liquidity position. The potential need for liquidity arising from these types of financial instruments is represented by the contractual notional amount of the instrument. Asset liquidity is provided by cash and assets which are readily marketable, or which will mature in the near future. Liquid assets include cash, federal funds sold, and short-term investments in time deposits in banks. Liquidity is also provided by access to funding sources, which include core depositors and correspondent banks that maintain accounts with and sell federal funds to our subsidiary bank. Other sources of funds include our ability to borrow from short-term sources, such as purchasing federal funds from correspondent banks, sales of securities under agreements to repurchase and other borrowings (see below) and an unfunded $25.00 million revolving line of credit established with Frost Bank, a nonaffiliated bank, which matures on June 30, 2025 (see next paragraph). Our subsidiary bank also has federal funds purchased lines of credit with two non-affiliated banks totaling $130.00 million. At March 31, 2024, there were no amounts drawn on these lines of credit. Our subsidiary bank also has (i) an available line of credit with the FHLB totaling $1.98 billion at March 31, 2024, secured by portions of our loan portfolio and certain investment securities, and (ii) access to the Federal Reserve Bank of Dallas lending program secured by portions of certain investment securities. At March 31, 2024, there was $781.5 million used on the FHLB line advance for undisbursed commitments (letters of credit) used to secure public funds.

The Company renewed its loan agreement, effective June 30, 2023, with Frost Bank. Under the loan agreement, as renewed and amended, we are permitted to draw up to $25.00 million on a revolving line of credit. Prior to June 30, 2025, interest is paid quarterly at The Wall Street Journal Prime Rate and the line of credit matures June 30, 2025. If a balance exists at June 30, 2025, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at The Wall Street Journal Prime Rate. The line of credit is unsecured. Among other provisions in the credit agreement, we must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require us to maintain certain capital, loan loss reserve, non-performing asset and cash flow coverage ratios. In addition, the credit agreement contains certain operational covenants, which among others, restricts the payment of dividends above 55% of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Since 1995, we have historically declared dividends as a percentage of our consolidated net income in a range of 36% (low) in 2021 and 2020 to 53% (high) in 2003 and 2006. The Company was in compliance with the financial and operational covenants at March 31, 2024. There was no outstanding balance under the line of credit as of March 31, 2024.

In addition, we anticipate that future acquisitions of financial institutions, expansion of branch locations or offerings of new products could also place a demand on our cash resources. Available cash and cash equivalents at our parent company which totaled $129.57 million at March 31, 2024, investment securities which totaled $2.17 million at March 31, 2024 and mature over 6 to 7 years, available dividends from our subsidiaries which totaled $290.26 million at March 31, 2024, utilization of available lines of credit, and future debt or equity offerings are expected to be the source of funding for these potential acquisitions or expansions.

Our liquidity position is continuously monitored and adjustments are made to the balance between sources and uses of funds as deemed appropriate. Liquidity risk management is an important element in our asset/liability management process. We regularly model liquidity stress scenarios to assess potential liquidity outflows or funding problems resulting from economic disruptions, volatility in the financial markets, unexpected credit events or other significant occurrences deemed potentially problematic by management. These scenarios are incorporated into our contingency funding plan, which provides the basis for the identification of our liquidity needs. As of March 31, 2024, management is not aware of any events that are reasonably likely to have a material adverse effect on our liquidity, capital resources or operations. We are monitoring closely the impact to the financial system due to the recent failures of several banks. Given the diversified core deposit base and relatively low loan to deposit ratios maintained at our subsidiary bank, we consider our current liquidity position to be adequate to meet our short-term and long-term liquidity needs. In addition, management is not aware of any regulatory recommendations regarding liquidity that would have a material adverse effect on us.

Off-Balance Sheet (“OBS”)/Reserve for Unfunded Commitments. We are a party to financial instruments with OBS risk in the normal course of business to meet the financing needs of our customers. These financial instruments include unfunded lines of credit, commitments to extend credit and federal funds sold to correspondent banks and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in our consolidated balance sheets. At March 31, 2024, the Company’s reserve for unfunded commitments totaled $7.46 million which is recorded in other liabilities.

Our exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. We generally use the same credit policies in making commitments and conditional obligations as we do for on-balance-sheet instruments.

Unfunded lines of credit and commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, as we deem necessary upon extension of credit, is based on our credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments we issue to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount.

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Table 10 – Commitments as of March 31, 2024 (dollars in thousands):

	Total Notional Amounts Committed
Unfunded lines of credit	$	1,215,592
Unfunded commitments to extend credit		826,437
Standby letters of credit		55,117
Total commercial commitments	$	2,097,146

We believe we have no other OBS arrangements or transactions with unconsolidated, special purpose entities that would expose us to liability that is not reflected on the face of the financial statements. The above table does not include balances related to the Company’s IRLC and forward mortgage-backed security trades. Total commercial commitments were $2.10 billion at March 31, 2024, compared to $1.93 billion at March 31, 2023, and $1.92 billion at December 31, 2023.

Parent Company Funding. Our ability to fund various operating expenses, dividends, and cash acquisitions is generally dependent on our own earnings (without giving effect to our subsidiaries), cash reserves and funds derived from our subsidiaries. These funds historically have been produced by intercompany dividends and management fees that are limited to reimbursement of actual expenses. We anticipate that our recurring cash sources will continue to include dividends and management fees from our subsidiaries. At March 31, 2024, $290.26 million was available for the payment of intercompany dividends by our subsidiaries without the prior approval of regulatory agencies. Our subsidiaries paid aggregate dividends of $12.00 million and $2.50 million for the three-months ended March 31, 2024 and 2023, respectively.

Dividends. Our long-term dividend policy is to pay cash dividends to our shareholders of approximately 35% to 40% of annual net earnings while maintaining adequate capital to support growth. We are also restricted by a loan covenant within our line of credit agreement with Frost Bank to dividend no greater than 55% of net income, as defined in such loan agreement. The cash dividend payout ratios have amounted to 48.23% and 46.16% of net earnings for the first three months of 2024 and 2023, respectively. Given our current capital position, projected earnings and asset growth rates, we do not anticipate any significant change in our current dividend policy.

Our bank subsidiary, which was a national banking association until April 22, 2024, and a member of the Federal Reserve System, was required by federal law to obtain the prior approval of the OCC to declare and pay dividends if the total of all dividends declared in any calendar year would exceed the total of (i) such bank’s net profits (as defined and interpreted by regulation) for that year plus (ii) its retained net profits (as defined and interpreted by regulation) for the preceding two calendar years, less any required transfers to surplus.

To pay dividends, we and our subsidiary bank must maintain adequate capital above regulatory guidelines and comply with the general requirements applicable to a Texas corporation. Generally, a Texas corporation may not pay a dividend to its shareholders if (i) after giving effect to the dividend, the corporation would be insolvent, or (ii) the amount of the dividend would exceed the surplus of the corporation. In addition, if the applicable regulatory authority believes that a bank under its jurisdiction is engaged in or is about to engage in an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), the authority may require, after notice and hearing, that such bank cease and desist from the unsafe practice. The Federal Reserve, the FDIC, Texas Department of Banking, and the OCC have each indicated that paying dividends that deplete a bank’s capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve, Texas Department of Banking, the OCC and the FDIC expect that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Management considers interest rate risk to be a significant market risk for the Company. See “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations — Interest Rate Risk” for disclosure regarding this market risk.

53

Item 4. Controls and Procedures.

As of March 31, 2024, we carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) or 15d-15(e) of the Securities Exchange Act of 1934). Our management, which includes our principal executive officer and our principal financial officer, does not expect that our disclosure controls and procedures will prevent all errors and all fraud.

A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. Our principal executive officer and principal financial officer have concluded, based on our evaluation of our disclosure controls and procedures, that our disclosure controls and procedures were effective at the reasonable assurance level as of March 31, 2024.

Subsequent to our evaluation, there were no significant changes in internal controls over financial reporting or other factors that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

54

PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

From time to time, we and our subsidiaries are parties to lawsuits arising in the ordinary course of our banking business. However, there are no material pending legal proceedings to which we, our subsidiaries, or any of their properties, are currently subject.

Item 1A. Risk Factors.

There has been no material change in the risk factors previously disclosed under Part I, Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Not applicable

Item 3. Defaults Upon Senior Securities.

Not Applicable

Item 4. Mine Safety Disclosures.

Not Applicable

Item 5. Other Information.

Not Applicable

55

Item 6. Exhibits.

3.1	—	Amended and Restated Certificate of Formation (incorporated by reference from Exhibit 3.1 of the Registrant’s Form 10-Q filed July 30, 2019).
3.2	—	Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 of the Registrant’s Form 8-K filed April 3, 2020).
3.3	—	Amendment to the Amended and Restated Bylaws of the Registrant, dated July 27, 2021 (incorporated by reference from Exhibit 3.3 to the Registrant's Form 10-Q filed August 2, 2021).
4.1	—	Specimen certificate of First Financial Common Stock (incorporated by reference from Exhibit 3 of the Registrant’s Amendment No. 1 to Form 8-A filed on Form 8-A/A No. 1 on January 7, 1994).
4.2	—	Description of Registrant’s Securities (incorporated by reference from Exhibit 4.2 of the Registrant’s Form 10-K filed February 23, 2024).
10.1	—	2012 Incentive Stock Option Plan (incorporated by reference from Appendix A of the Registrant’s Definitive Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 filed March 1, 2012).++
10.2	—	2021 Omnibus Stock and Incentive Plan as Amended (incorporated by reference from Exhibit 10 of the Registrant’s Form 8-K filed April 28, 2021).++
10.3	—	Promissory Note, dated June 30, 2023, between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.1 of the Registrant's Form 8-K filed July 7, 2023).
10.4	—	Amended and Restated Loan Agreement, dated June 30, 2023, by and between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.2 of the Registrant's Form 8-K filed July 7, 2023).
10.5	—	2015 Restricted Stock Plan as Amended and Restated April 28, 2020 (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed May 1, 2020).++
10.6	—	Form of Executive Recognition Agreement (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed August 10, 2022).++
10.7	—	First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (incorporated by reference from Exhibit 10.1 of the Registrant's Form 8-K filed July 29, 2022.)++
10.8	—	Confidential Separation and Release Agreement , dated January 9, 2023, by and between the Company and James R. Gordon (incorporated by reference from Exhibit 10.1 of the Registrant's Form 8-K filed January 11, 2023).++
31.1	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Executive Officer of First Financial Bankshares, Inc.*
31.2	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Financial Officer of First Financial Bankshares, Inc.*
32.1	—	Section 1350 Certification of Chief Executive Officer of First Financial Bankshares, Inc.+
32.2	—	Section 1350 Certification of Chief Financial Officer of First Financial Bankshares, Inc.+
101.INS	—	Inline XBRL Instance Document.- the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.*
101.SCH	—	Inline XBRL Taxonomy Extension Schema with Embedded Linkbase Documents.*
104	—	Cover Page Interactive Data File (embedded within the Inline XBRL document)

* Filed herewith

+ Furnished herewith. This Exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

++ Management contract or compensatory plan or arrangement.

56

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	FIRST FINANCIAL BANKSHARES, INC.
Date: May 3, 2024	By:	/s/ F. Scott Dueser
		F. Scott Dueser
		Chairman of the Board, President and Chief Executive Officer
Date: May 3, 2024	By:	/s/ Michelle S. Hickox
		Michelle S. Hickox
		Executive Vice President and
		Chief Financial Officer, Secretary and Treasurer

57

EX-31.1

Exhibit 31.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

I, F. Scott Dueser, Chairman of the Board, President and Chief Executive Officer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-Q of First Financial Bankshares, Inc.;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f), for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 3, 2024

By:	/s/ F. Scott Dueser
	F. Scott Dueser
	Chairman of the Board, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

I, Michelle S. Hickox, Executive Vice President and Chief Financial Officer, Secretary and Treasurer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-Q of First Financial Bankshares, Inc.;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f), for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 3, 2024

By:	/s/ Michelle S. Hickox
	Michelle S. Hickox
	Executive Vice President and Chief
	Financial Officer, Secretary and Treasurer

EX-32.1

Exhibit 32.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended March 31, 2024 of First Financial Bankshares, Inc. (the “Company”).

I, F. Scott Dueser, the Chairman of the Board, President and Chief Executive Officer of the Company, certify that:

1. the Form 10-Q fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 3, 2024

By:	/s/ F. Scott Dueser
	F. Scott Dueser
	Chairman of the Board, President and Chief Executive Officer

Subscribed and sworn to before me this 3rd day of May, 2024.

/s/ Melissa Ann Fenton

Melissa Ann Fenton

Notary Public

My commission expires: October 11, 2024

EX-32.2

Exhibit 32.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended March 31, 2024 of First Financial Bankshares, Inc. (the “Company”).

I, Michelle S. Hickox, the Executive Vice President and Chief Financial Officer, Secretary and Treasurer of the Company, certify that:

1. the Form 10-Q fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 3, 2024

By:	/s/ Michelle S. Hickox
	Michelle S. Hickox
	Executive Vice President and Chief
	Financial Officer, Secretary and Treasurer

Subscribed and sworn to before me this 3rd day of May, 2024.

/s/ Melissa Ann Fenton

Melissa Ann Fenton

Notary Public

My commission expires: October 11, 2024

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 03, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Document Period End Date	Mar. 31, 2024
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		142,841,009

XML

Consolidated Balance Sheets - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
ASSETS
CASH AND DUE FROM BANKS	$ 222,464,000	$ 281,354,000	$ 224,875,000
FEDERAL FUNDS SOLD	12,300,000	0	0
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	365,397,000	255,237,000	221,336,000
Total cash and cash equivalents	600,161,000	536,591,000	446,211,000
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of these securities was $5,217,517, $5,879,040, and $5,243,681 as of March 31, 2024 and 2023, and December 31, 2023, respectively)	4,658,526,000	4,732,762,000	5,298,557,000
LOANS:
Held-for-investment	7,229,410,000	7,148,791,000	6,576,215,000
Less—allowance for credit losses	(89,562,000)	(88,734,000)	(80,818,000)
Net loans held for investment	7,139,848,000	7,060,057,000	6,495,397,000
Held-for-sale ($15,080, $11,766 and $11,077, at fair value at March 31, 2024 and 2023, and December 31, 2023, respectively)	16,109,000	14,253,000	11,996,000
BANK PREMISES AND EQUIPMENT, net	151,953,000	151,788,000	153,718,000
INTANGIBLE ASSETS, net	314,465,000	314,622,000	315,306,000
OTHER ASSETS	310,096,000	295,521,000	286,801,000
Total assets	13,191,158,000	13,105,594,000	13,007,986,000
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	3,348,147,000	3,435,586,000	3,890,991,000
INTEREST-BEARING DEPOSITS	7,941,661,000	7,702,714,000	7,045,427,000
Total deposits	11,289,808,000	11,138,300,000	10,936,418,000
DIVIDENDS PAYABLE	25,754,000	25,712,000	24,274,000
REPURCHASE AGREEMENTS	307,297,000	381,928,000	608,299,000
BORROWINGS	26,803,000	22,153,000	24,628,000
OTHER LIABILITIES	50,129,000	38,601,000	41,514,000
Total liabilities	11,699,791,000	11,606,694,000	11,635,133,000
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
COMMON STOCK - ($0.01 par value, authorized 200,000,000 shares; 142,817,159, 142,703,531, and 142,716,939 shares issued at March 31, 2024 and 2023, and December 31, 2023, respectively)	1,428,000	1,427,000	1,427,000
CAPITAL SURPLUS	683,997,000	681,246,000	679,429,000
RETAINED EARNINGS	1,247,169,000	1,219,525,000	1,150,246,000
TREASURY STOCK (shares at cost: 931,427, 927,789 and 930,152 at March 31, 2024 and 2023, and December 31, 2023, respectively)	(12,120,000)	(11,855,000)	(11,271,000)
DEFERRED COMPENSATION	12,120,000	11,855,000	11,271,000
ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSS), net	(441,227,000)	(403,298,000)	(458,249,000)
Total shareholders' equity	1,491,367,000	1,498,900,000	1,372,853,000
Total liabilities and shareholders' equity	$ 13,191,158,000	$ 13,105,594,000	$ 13,007,986,000

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Statement of Financial Position [Abstract]
Securities, Available-for-sale, Amortized Cost	$ 5,217,517	$ 5,243,681	$ 5,879,040
Loans held-for-sale, fair value	$ 15,080	$ 11,077	$ 11,766
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	142,817,159	142,716,939	142,703,531
Treasury stock, shares	931,427	930,152	927,789

XML

Consolidated Statements of Earnings (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
INTEREST INCOME:
Interest and fees on loans	$ 117,091,000	$ 89,009,000
Interest on investment securities:
Taxable	19,952,000	20,782,000
Exempt from federal income tax	7,737,000	10,067,000
Interest on federal funds sold and interest-bearing demand deposits in banks	4,715,000	1,650,000
Total interest income	149,495,000	121,508,000
INTEREST EXPENSE:
Interest on deposits	45,251,000	21,812,000
Interest on repurchase agreements and borrowings	4,002,000	3,410,000
Total interest expense	49,253,000	25,222,000
Net interest income	100,242,000	96,286,000
Provision for credit losses	808,000	2,781,000
Net interest income after provision for credit losses	99,434,000	93,505,000
NONINTEREST INCOME:
Trust fees	11,379,000	9,845,000
Service charges on deposit accounts	6,246,000	6,036,000
Debit card fees	4,891,000	4,936,000
Credit card fees	631,000	609,000
Gain on sale and fees on mortgage loans	3,128,000	2,974,000
Net gain on sale of available-for-sale securities	0	12,000
Net gain on sale of foreclosed assets	0	34,000
Net gain on sale of other assets	0	930,000
Interest on loan recoveries	555,000	346,000
Other	2,553,000	2,285,000
Total noninterest income	29,383,000	28,007,000
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	36,683,000	31,461,000
Net occupancy expense	3,470,000	3,430,000
Equipment expense	2,237,000	2,127,000
FDIC insurance premiums	1,965,000	1,654,000
Debit card expense	3,058,000	3,199,000
Professional and service fees	2,396,000	2,365,000
Printing, stationery and supplies	447,000	710,000
Operational and other losses	1,154,000	931,000
Software amortization and expense	3,005,000	2,311,000
Amortization of intangible assets	157,000	228,000
Other	9,368,000	8,840,000
Total noninterest expense	63,940,000	57,256,000
EARNINGS BEFORE INCOME TAXES	64,877,000	64,256,000
INCOME TAX EXPENSE	11,480,000	11,688,000
NET EARNINGS	$ 53,397,000	$ 52,568,000
NET EARNINGS PER SHARE, BASIC	$ 0.37	$ 0.37
NET EARNINGS PER SHARE, DILUTED	0.37	0.37
DIVIDENDS PER SHARE	$ 0.18	$ 0.17

XML

Consolidated Statements of Comprehensive Earnings (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 53,397	$ 52,568
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain (loss) on investment securities available-for-sale, before income taxes	(48,011)	97,454
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings, before income taxes	0	(12)
Total other items of comprehensive earnings (loss)	(48,011)	97,442
Income tax benefit (expense) related to:
Change in unrealized gain (loss) on investment securities available-for-sale	10,082	(20,466)
Reclassification adjustment for realized gains (losses) on investment securities included in net earnings	0	3
Total income tax benefit (expense)	10,082	(20,463)
COMPREHENSIVE EARNINGS (LOSS)	$ 15,468	$ 129,547

XML

Consolidated Statements of Shareholders' Equity (Unaudited) - 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, 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)
Net earnings (Unaudited)	52,568			52,568
Stock option exercises (unaudited)	884		884
Stock option exercises, Shares		45,660
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- based compensation expense (unaudited)	952		952
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)
Beginning Balance at Dec. 31, 2023	$ 1,498,900	$ 1,427	681,246	1,219,525	$ (11,855)	11,855	(403,298)
Beginning Balance, Shares at Dec. 31, 2023		142,716,939
Treasury Stock, Beginning Balance, Shares at Dec. 31, 2023	(930,152)				(930,152)
Net earnings (Unaudited)	$ 53,397			53,397
Stock option exercises (unaudited)	1,623		1,622
Stock option exercises, Shares		100,220
Cash dividends declared	(25,753)			(25,753)
Change in unrealized gain (loss) in investment securities available-for-sale, net of related income taxes (unaudited)	(37,929)						(37,929)
Shares purchased in connection with directors' deferred compensation plan, net (unaudited)					$ (265)	265
Shares purchased in connection with directors' deferred compensation plan, net (unaudited), Shares					(1,275)
Stock- based compensation expense (unaudited)	1,129		1,129
Ending Balance at Mar. 31, 2024	$ 1,491,367	$ 1,428	$ 683,997	$ 1,247,169	$ (12,120)	$ 12,120	$ (441,227)
Ending Balance, Shares at Mar. 31, 2024		142,817,159
Treasury Stock, Ending Balance, Shares at Mar. 31, 2024	(931,427)				(931,427)

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Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash dividend per share	$ 0.18	$ 0.17
Retained Earnings [Member]
Cash dividend per share	$ 0.18	$ 0.17

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 53,397	$ 52,568
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	3,221	3,074
Provision for credit losses	808	2,781
Securities premium amortization, net	11,153	13,770
Gain on sale of securities and other assets, net	0	(976)
Stock-based compensation	1,129	952
Net tax benefit from stock-based compensation	102	93
Change in loans held-for-sale	(1,797)	48
Change in other assets	(4,245)	15,851
Change in other liabilities	11,875	7,755
Total adjustments	22,246	43,348
Net cash provided by operating activities	75,643	95,916
Activity in available-for-sale securities:
Sales	0	145,948
Maturities	3,644,519	116,922
Purchases	(3,629,507)	(3,298)
Net increase in loans held-for-investment	(80,652)	(133,974)
Purchases of bank premises, equipment and software	(3,912)	(6,347)
Proceeds from sale of bank premises and equipment and other assets	41	2,423
Net cash provided by (used in) investing activities	(69,511)	121,674
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(87,439)	(170,797)
Net increase in interest-bearing deposits	238,947	101,708
Net increase (decrease) in repurchase agreements and borrowings	(69,981)	(9,581)
Common stock transactions:
Proceeds from stock option exercises/stock unit conversions/restricted stock activity	1,623	884
Dividends paid	(25,712)	(24,271)
Net cash provided by (used in) financing activities	57,438	(102,057)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	63,570	115,533
CASH AND CASH EQUIVALENTS, beginning of period	536,591	330,678
CASH AND CASH EQUIVALENTS, end of period	600,161	446,211
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	51,106	22,726
Transfer of loans to other real estate	$ 454	$ 175

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 1 – Summary of Significant Accounting Policies

Nature of Operations

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, 2024. The Company’s subsidiary bank is First Financial Bank. 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 is located. In addition, the Company also owns First Financial Trust & Asset Management Company, First Financial Insurance Agency, Inc. (inactive), First Technology Services, Inc., FFB Investment Paris Fund, LLC, and FFB Portfolio Management, Inc.

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. On July 25, 2023, the Company's Board of Directors renewed the prior authorization through July 31, 2024. 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. Under the current authorization, the Company has repurchased and retired 101,337 shares (all during September 2023) at an average price of $26.99 per share.

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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. 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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. 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 became 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.

ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848." ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance provided by ASU 2020-04 and ASU 2021-01, which are discussed above. ASU 2022-06, which was effective upon issuance, defers the sunset date of this prior guidance from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief guidance in Topic 848. The adoption of ASU 2022-06 did not have a significant impact on our financial statements.

ASU 2023-02, "Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method." ASU 2023-02 is intended to improve the accounting and disclosures for investments in tax credit structures. ASU 2023-02 allows entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. Previously, this method was only available for qualifying tax equity investments in low-income housing tax credit structures. ASU 2023-02 has been early adopted by the Company as it relates to the qualifying investments that are generating New Market Tax Credits. The adoption of ASU 2023-02 did not have a significant impact on our financial statements.

ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” ASU 2023-09 requires entities to disclose more detailed information in their reconciliation of their statutory tax rate to their effective tax rate. Public business entities (PBEs) are required to provide this incremental detail in a numerical, tabular format. The ASU also requires entities to disclose more detailed information about income taxes paid, including by jurisdiction; pretax income (or loss) from continuing operations; and income tax expense (or benefit). PBEs will be required to adopt the new requirements in annual reporting periods beginning after December 15, 2024, and interim periods beginning after December 15, 2025. The adoption of ASU 2023-09 is not expected to 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, 2024 or 2023, respectively.

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 if 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, 2024 and 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023, 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. 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 based on the risk perceived in concentrations of the loan portfolio, changes in economic conditions, early delinquencies, and factors related to credit administrations, including, among others, underwriting standards, loan-to-value ratios, and borrowers’ risk rating; and (3) individual allowances on loans where borrowers are experiencing financial difficulty or when the Company determines that the foreclosure is probable.

In calculating the allowance for credit losses, most loans are segmented into pools based upon similar characteristics and risk profiles. Common characteristics and risk profiles include the type/purpose of loan, underlying collateral, geographical similarity and historical/expected credit loss patterns. In developing these loan pools for the purposes of modeling expected credit losses, we also analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors. For modeling purposes, our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. We periodically reassess each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. Refer to Note 3 for more details on the Company’s portfolio segments.

The Company applies two methodologies to estimate the allowance on its pooled portfolio segments; discounted cash flows method and weighted average remaining life method. Allowance estimates on the following portfolio segments are calculated using the discounted cash flows method: C&I, Municipal, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE and Residential. Allowance estimates on the following portfolio segments are calculated using the remaining life method: Agriculture, Consumer Auto and Consumer Non-Auto. The models related to these methodologies utilize the Company’s historical default and loss experience adjusted for future economic forecasts. The reasonable and supportable forecast period represents a one-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period, expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include: Texas unemployment rate, Texas house price index and Texas retail sales index. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience.

In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within our loan pools. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk rating of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management’s assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. We reevaluate the fair value of collateral supporting collateral dependent loans on an ongoing basis.

Management qualitatively adjusts model results for risk factors that are not considered within our modeling processes but are nonetheless relevant in assessing the expected credit losses within our loan pools. These qualitative factor (“Q-Factor”) adjustments may increase management’s estimate of expected credit losses based upon the estimated level of risk within the risk factor. The various risk factors 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, 2024 and 2023, and December 31, 2023, the Company’s reserve for unfunded commitments totaled $7,455,000, $10,397,000 and $7,903,000, 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, and is included in other assets in the consolidated balance sheet. 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 ACL. 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 during the three-months ended March 31, 2024 or 2023, 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 $441,227,000, $458,249,000 and $403,298,000 at March 31, 2024, and 2023, and December 31, 2023, 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, 2024, and 2023, and December 31, 2023, deferred tax assets totaled $122,844,000, $122,947,000 and $110,800,000, 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 three, 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 performance stock units which vest over a three-year period based on Company performance metrics relative to a defined peer group. 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 determined 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 417,000 and 480,000 anti-dilutive shares for the three-months ended March 31, 2024 and 2023, 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, 2024:
Net earnings per share, basic	$	53,397		142,724,674	$	0.37
Effect of stock options and stock grants		—		304,775		—
Net earnings per share, diluted	$	53,397		143,029,449	$	0.37

	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

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Securities

3 Months Ended

Mar. 31, 2024

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, 2024
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	445,399	$	—	$	(13,231	)	$	432,168
Obligations of states and political subdivisions		1,592,523		570		(139,058	)		1,454,035
Residential mortgage-backed securities		2,685,896		72		(386,691	)		2,299,277
Commercial mortgage-backed securities		381,198		52		(12,344	)		368,906
Corporate bonds and other		112,501		—		(8,361	)		104,140
Total securities available-for-sale	$	5,217,517	$	694	$	(559,685	)	$	4,658,526

	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

	December 31, 2023
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	496,975	$	4	$	(14,745	)	$	482,234
Obligations of states and political subdivisions		1,621,405		934		(125,182	)		1,497,157
Residential mortgage-backed securities		2,716,968		7		(352,883	)		2,364,092
Commercial mortgage-backed securities		295,663		—		(11,339	)		284,324
Corporate bonds and other		112,670		—		(7,715	)		104,955
Total securities available-for-sale	$	5,243,681	$	945	$	(511,864	)	$	4,732,762

The Company did not hold any securities classified as held-to-maturity at March 31, 2024, March 31, 2023, or December 31, 2023.

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, 2024 and 2023, and December 31, 2023, 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, 2024, by contractual and expected maturity, are shown below (dollars in thousands):

	Amortized		Estimated
	Cost Basis		Fair Value
Due within one year	$	343,112	$	337,823
Due after one year through five years		1,374,546		1,288,485
Due after five years through ten years		2,421,721		2,126,343
Due after ten years		1,078,138		905,875
Total	$	5,217,517	$	4,658,526

The following tables disclose as of March 31, 2024 and 2023, and December 31, 2023, 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, 2024	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	2,438	$	16	$	429,730	$	13,215	$	432,168	$	13,231
Obligations of states and political subdivisions		33,073		114		1,398,108		138,944	$	1,431,181		139,058
Residential mortgage-backed securities		22,586		299		2,261,311		386,392	$	2,283,897		386,691
Commercial mortgage-backed securities		64,721		507		275,924		11,837	$	340,645		12,344
Corporate bonds and other		—		—		104,140		8,361	$	104,140		8,361
Total	$	122,818	$	936	$	4,469,213	$	558,749	$	4,592,031	$	559,685

	Less than 12 Months				12 Months or Longer				Total
March 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
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
December 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	3,477	$	7	$	477,306	$	14,738	$	480,783	$	14,745
Obligations of states and political subdivisions		11,855		34		1,427,975		125,148		1,439,830		125,182
Residential mortgage-backed securities		1,631		1		2,361,089		352,882		2,362,720		352,883
Commercial mortgage-backed securities		—		—		284,324		11,339		284,324		11,339
Corporate bonds and other		—		—		104,955		7,715		104,955		7,715
Total	$	16,963	$	42	$	4,655,649	$	511,822	$	4,672,612	$	511,864

The number of investments in an unrealized loss position totaled 832 at March 31, 2024. 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, 2024 and 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023. 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, 2024, 66.95% of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 56.31% are guaranteed by the Texas Permanent School Fund.

Securities, carried at approximately $2,516,117,000 on March 31, 2024, 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, 2024, there were no sales of investment securities that were classified as available-for-sale. During the three-months ended March 31, 2023, sales of investment securities that were classified as available-for-sale were $145,948,000. There were no gross realized security gains or losses from sales and calls during the first quarter of 2024. Gross realized security gains from sales and calls during the first quarter of 2023 totaled $1,052,000. Gross realized security losses from sales or calls during the first quarter of 2023 totaled $1,040,000.

The specific identification method was used to determine cost in order to compute the realized gains and losses.

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Loans Held for Investment and Allowance for Loan Losses

3 Months Ended

Mar. 31, 2024

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, 2024 and 2023, and December 31, 2023, 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,
	2024			2023			2023
Commercial:
C&I	$	1,191,516		$	954,686		$	1,164,811
Municipal		211,013			221,379			214,850
Total Commercial		1,402,529			1,176,065			1,379,661
Agricultural		87,882			77,017			84,890
Real Estate:
Construction & Development		921,773			921,190			963,158
Farm		311,002			307,706			344,954
Non-Owner Occupied CRE		853,721			737,117			827,969
Owner Occupied CRE		1,032,845			1,043,018			1,037,281
Residential		1,918,573			1,628,841			1,834,593
Total Real Estate		5,037,914			4,637,872			5,007,955
Consumer:
Auto		549,837			537,410			521,859
Non-Auto		151,248			147,851			154,426
Total Consumer		701,085			685,261			676,285
Total Loans		7,229,410			6,576,215			7,148,791
Less: Allowance for credit losses		(89,562	)		(80,818	)		(88,734	)
Loans, net	$	7,139,848		$	6,495,397		$	7,060,057

Outstanding loan balances at March 31, 2024 and 2023, and December 31, 2023, are net of unearned income, including net deferred loan fees.

At March 31, 2024, $5,095,506,000 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, 2024, this available line of credit was $1,984,900,000. At March 31, 2024, there was $781,500,000 used on the line advance for undisbursed commitments (letters of credit) used to secure public funds.

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,
	2024		2023		2023
Nonaccrual loans	$	36,157	$	24,171	$	33,609
Loans still accruing and past due 90 days or more		33		22		1,004
Total nonperforming loans	$	36,190	$	24,193	$	34,613

The Company had $37,204,000, $24,389,000 and $35,096,000 in nonaccrual, past due 90 days or more and still accruing, and foreclosed assets at March 31, 2024 and 2023, and December 31, 2023, respectively. Nonaccrual loans at March 31, 2024 and 2023, and December 31, 2023, consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Commercial:
C&I	$	3,950	$	5,343	$	4,132
Municipal		—		—		—
Total Commercial		3,950		5,343		4,132
Agricultural		2,043		161		155
Real Estate:
Construction & Development		1,976		773		1,444
Farm		4,597		452		4,804
Non-Owner Occupied CRE		9,243		2,907		8,022
Owner Occupied CRE		5,719		6,823		6,822
Residential		7,815		7,232		7,649
Total Real Estate		29,350		18,187		28,741
Consumer:
Auto		486		398		464
Non-Auto		328		82		117
Total Consumer		814		480		581
Total	$	36,157	$	24,171	$	33,609

No significant additional funds are committed to be advanced in connection with nonaccrual loans as of March 31, 2024.

Summary information on the allowance for credit losses for the three-months ended March 31, 2024 and 2023, are outlined by portfolio segment in the following tables (dollars in thousands):

Three-Months Ended March 31, 2024	C&I			Municipal		Agricultural			Construction & Development			Farm
Beginning balance	$	15,698		$	195	$	1,281		$	28,553		$	2,914
Provision for loan losses		501			—		2,017			(3,709	)		(397	)
Recoveries		111			—		5			—			—
Charge-offs		(204	)		—		(60	)		(33	)		—
Ending balance	$	16,106		$	195	$	3,243		$	24,811		$	2,517

Three-Months Ended March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE			Residential		Auto			Non-Auto			Total
Beginning balance	$	13,425	$	13,813		$	11,654	$	810		$	391		$	88,734
Provision for loan losses		1,536		(1,099	)		1,813		384			210			1,256
Recoveries		7		42			98		112			47			422
Charge-offs		—		—			—		(399	)		(154	)		(850	)
Ending balance	$	14,968	$	12,756		$	13,565	$	907		$	494		$	89,562

Three-Months Ended March 31, 2023	C&I			Municipal		Agricultural			Construction & Development		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 Occupied CRE			Owner Occupied CRE		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

Additionally, the Company records a reserve for unfunded commitments in other liabilities, which totaled $7,455,000, $10,397,000 and $7,903,000 at March 31, 2024 and 2023, and December 31, 2023, respectively. The provision for loan losses of $1,256,000 for the three-months ended March 31, 2024 is combined with the reversal of the provision for unfunded commitments of $448,000 and reported in the net aggregate of $808,000 under the provision for credit losses in the consolidated statement of earnings for the three-months ended March 31, 2024.

The $4,707,000 provision for loan losses for the three-months ended March 31, 2023 above is combined with the reversal of provision for unfunded commitments of $1,926,000 and reported in the aggregate of $2,781,000 under the provision for credit losses for the three-months ended March 31, 2023.

The Company’s loans that are individually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of March 31, 2024 and 2023, and December 31, 2023, are summarized in the following tables by loan segment (dollars in thousands):

March 31, 2024	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	756	$	3,194	$	37,504	$	41,454	$	1,541	$	4,170	$	5,711
Municipal		—		—		559		559		—		—		—
Total Commercial		756		3,194		38,063		42,013		1,541		4,170		5,711
Agricultural		713		1,330		4,044		6,087		849		1,881		2,730
Real Estate:
Construction & Development		903		1,073		28,953		30,929		189		2,054		2,243
Farm		—		4,597		1,936		6,533		727		31		758
Non-Owner Occupied CRE		1,850		7,393		22,412		31,655		1,235		1,772		3,007
Owner Occupied CRE		2,827		2,892		35,460		41,179		445		1,793		2,238
Residential		4,404		3,411		31,456		39,271		242		2,014		2,256
Total Real Estate		9,984		19,366		120,217		149,567		2,838		7,664		10,502
Consumer:
Auto		—		486		2,342		2,828		1		4		5
Non-Auto		—		328		764		1,092		72		57		129
Total Consumer		—		814		3,106		3,920		73		61		134
Total	$	11,453	$	24,704	$	165,430	$	201,587	$	5,301	$	13,776	$	19,077

March 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
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

December 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	1,322	$	2,810	$	18,633	$	22,765	$	1,363	$	4,495	$	5,858
Municipal		—		—		733		733		—		—		—
Total Commercial		1,322		2,810		19,366		23,498		1,363		4,495		5,858
Agricultural		57		98		1,304		1,459		50		700		750
Real Estate:
Construction & Development		758		686		22,545		23,989		148		2,253		2,401
Farm		—		4,804		1,362		6,166		937		57		994
Non-Owner Occupied CRE		1,919		6,103		29,117		37,139		700		2,984		3,684
Owner Occupied CRE		4,661		2,161		35,746		42,568		232		1,431		1,663
Residential		3,909		3,740		30,257		37,906		360		1,799		2,159
Total Real Estate		11,247		17,494		119,027		147,768		2,377		8,524		10,901
Consumer:
Auto		—		464		2,125		2,589		1		3		4
Non-Auto		—		117		782		899		—		60		60
Total Consumer		—		581		2,907		3,488		1		63		64
Total	$	12,626	$	20,983	$	142,604	$	176,213	$	3,791	$	13,782	$	17,573

The Company’s allowance for loans that are individually evaluated for credit losses and collectively evaluated for credit losses as of March 31, 2024 and 2023, and December 31, 2023, 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, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,711	$	—	$	2,730	$	2,243	$	758
Loans collectively evaluated for credit losses		10,395		195		513		22,568		1,759
Total	$	16,106	$	195	$	3,243	$	24,811	$	2,517

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,007	$	2,238	$	2,256	$	5	$	129	$	19,077
Loans collectively evaluated for credit losses		11,961		10,518		11,309		902		365		70,485
Total	$	14,968	$	12,756	$	13,565	$	907	$	494	$	89,562

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,858	$	—	$	750	$	2,401	$	994
Loans collectively evaluated for credit losses		9,840		195		531		26,152		1,920
Total	$	15,698	$	195	$	1,281	$	28,553	$	2,914

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,684	$	1,663	$	2,159	$	4	$	60	$	17,573
Loans collectively evaluated for credit losses		9,741		12,150		9,495		806		331		71,161
Total	$	13,425	$	13,813	$	11,654	$	810	$	391	$	88,734

The Company’s recorded investment in loans as of March 31, 2024 and 2023, and December 31, 2023, related to the balance in the allowance for credit losses follows below (dollars in thousands):

March 31, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	41,454	$	559	$	6,087	$	30,929	$	6,533
Loans collectively evaluated for credit losses		1,150,062		210,454		81,795		890,844		304,469
Total	$	1,191,516	$	211,013	$	87,882	$	921,773	$	311,002

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	31,655	$	41,179	$	39,271	$	2,828	$	1,092	$	201,587
Loans collectively evaluated for credit losses		822,066		991,666		1,879,302		547,009		150,156		7,027,823
Total	$	853,721	$	1,032,845	$	1,918,573	$	549,837	$	151,248	$	7,229,410

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	22,765	$	733	$	1,459	$	23,989	$	6,166
Loans collectively evaluated for credit losses		1,142,046		214,117		83,431		939,169		338,788
Total	$	1,164,811	$	214,850	$	84,890	$	963,158	$	344,954

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	37,139	$	42,568	$	37,906	$	2,589	$	899	$	176,213
Loans collectively evaluated for credit losses		790,830		994,713		1,796,687		519,270		153,527		6,972,578
Total	$	827,969	$	1,037,281	$	1,834,593	$	521,859	$	154,426	$	7,148,791

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, 2024 (dollars in millions):

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	236	$	551	$	226	$	70	$	32	$	36	$	—	$	1,151
Special mention		6		17		1		—		—		—		—		24
Substandard		2		10		1		1		2		1		—		17
Doubtful		—		—		—		—		—		—		—		—
Total	$	244	$	578	$	228	$	71	$	34	$	37	$	—	$	1,192
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	5	$	20	$	81	$	15	$	10	$	79	$	—	$	210
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		1		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	5	$	20	$	81	$	16	$	10	$	79	$	—	$	211
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	18	$	54	$	6	$	3	$	1	$	—	$	—	$	82
Special mention		—		1		—		—		—		—		—		1
Substandard		3		1		—		—		—		1		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	21	$	56	$	6	$	3	$	1	$	1	$	—	$	88
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	117	$	438	$	240	$	63	$	19	$	14	$	—	$	891
Special mention		7		6		3		—		—		—		—		16
Substandard		1		7		1		6		—		—		—		15
Doubtful		—		—		—		—		—		—		—		—
Total	$	125	$	451	$	244	$	69	$	19	$	14	$	—	$	922
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	23	$	58	$	101	$	71	$	23	$	29	$	—	$	305
Special mention		—		1		—		—		—		—		—		1
Substandard		—		1		—		—		4		—		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	23	$	60	$	101	$	71	$	27	$	29	$	—	$	311
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	59	$	133	$	244	$	174	$	104	$	108	$	—	$	822
Special mention		—		—		—		1		1		1		—		3
Substandard		—		2		1		3		7		16		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	59	$	135	$	245	$	178	$	112	$	125	$	—	$	854
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	28	$	155	$	305	$	202	$	110	$	190	$	—	$	990
Special mention		—		2		1		8		—		—		—		11
Substandard		—		2		6		5		1		18		—		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	28	$	159	$	312	$	215	$	111	$	208	$	—	$	1,033
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	130	$	450	$	424	$	302	$	151	$	281	$	141	$	1,879
Special mention		—		1		1		1		1		2		1		7
Substandard		2		7		4		4		2		10		3		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	132	$	458	$	429	$	307	$	154	$	293	$	145	$	1,918
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	91	$	175	$	188	$	64	$	22	$	8	$	—	$	548
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		1		—		—		—		2
Doubtful		—		—		—		—		—		—		—		—
Total	$	91	$	175	$	189	$	65	$	22	$	8	$	—	$	550
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	18	$	59	$	41	$	20	$	3	$	2	$	7	$	150
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	18	$	60	$	41	$	20	$	3	$	2	$	7	$	151
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	725	$	2,093	$	1,856	$	984	$	475	$	747	$	148	$	7,028
Special mention		13		28		6		10		2		3		1		63
Substandard		8		31		14		21		16		46		3		139
Doubtful		—		—		—		—		—		—		—		—
Total	$	746	$	2,152	$	1,876	$	1,015	$	493	$	796	$	152	$	7,230
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, 2023 (dollars in millions):

March 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 December 31, 2023 (dollars in millions):

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	720	$	276	$	73	$	36	$	14	$	23	$	—	$	1,142
Special mention		1		1		—		—		1		—		—		3
Substandard		12		2		2		1		1		2		—		20
Doubtful		—		—		—		—		—		—		—		—
Total	$	733	$	279	$	75	$	37	$	16	$	25	$	—	$	1,165
Year-to-Date Gross Charge-Offs	$	—	$	—	$	1	$	—	$	—	$	—	$	—	$	1

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	25	$	83	$	15	$	10	$	1	$	80	$	—	$	214
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	25	$	83	$	16	$	10	$	1	$	80	$	—	$	215
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	63	$	15	$	4	$	1	$	1	$	—	$	—	$	84
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	64	$	15	$	4	$	1	$	1	$	—	$	—	$	85
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	515	$	311	$	78	$	20	$	9	$	6	$	—	$	939
Special mention		8		2		—		—		—		—		—		10
Substandard		9		4		1		—		—		—		—		14
Doubtful		—		—		—		—		—		—		—		—
Total	$	532	$	317	$	79	$	20	$	9	$	6	$	—	$	963
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	101	$	111	$	73	$	24	$	8	$	22	$	—	$	339
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		5		—		1		—		6
Doubtful		—		—		—		—		—		—		—		—
Total	$	101	$	111	$	73	$	29	$	8	$	23	$	—	$	345
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	167	$	232	$	172	$	106	$	41	$	73	$	—	$	791
Special mention		—		5		1		—		—		2		—		8
Substandard		2		1		2		7		13		4		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	169	$	238	$	175	$	113	$	54	$	79	$	—	$	828
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	154	$	305	$	217	$	114	$	62	$	142	$	—	$	994
Special mention		1		1		4		—		1		1		—		8
Substandard		3		6		4		—		7		15		—		35
Doubtful		—		—		—		—		—		—		—		—
Total	$	158	$	312	$	225	$	114	$	70	$	158	$	—	$	1,037
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	477	$	415	$	313	$	158	$	67	$	229	$	138	$	1,797
Special mention		1		2		2		2		—		3		1		11
Substandard		4		4		3		3		3		7		3		27
Doubtful		—		—		—		—		—		—		—		—
Total	$	482	$	421	$	318	$	163	$	70	$	239	$	142	$	1,835
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	195	$	212	$	74	$	26	$	10	$	2	$	—	$	519
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		1		1		—		—		—		3
Doubtful		—		—		—		—		—		—		—		—
Total	$	195	$	213	$	75	$	27	$	10	$	2	$	—	$	522
Year-to-Date Gross Charge-Offs	$	—	$	1	$	—	$	—	$	—	$	—	$	—	$	1

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	71	$	47	$	22	$	4	$	1	$	1	$	7	$	153
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	72	$	47	$	22	$	4	$	1	$	1	$	7	$	154
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	2,488	$	2,007	$	1,041	$	499	$	214	$	578	$	145	$	6,972
Special mention		11		11		7		2		2		6		1		40
Substandard		32		18		14		17		24		29		3		137
Doubtful		—		—		—		—		—		—		—		—
Total	$	2,531	$	2,036	$	1,062	$	518	$	240	$	613	$	149	$	7,149
Year-to-Date Gross Charge-Offs	$	—	$	1	$	1	$	—	$	—	$	—	$	—	$	2

At March 31, 2024 and 2023, and December 31, 2023, the Company’s past due loans are as follows (dollars in thousands):

March 31, 2024	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	6,462	$	250	$	1,594	$	8,306	$	1,183,210	$	1,191,516	$	33
Municipal		25		—		—		25		210,988		211,013		—
Total Commercial		6,487		250		1,594		8,331		1,394,198		1,402,529		33
Agricultural		624		—		71		695		87,187		87,882		—
Real Estate:
Construction & Development		9,277		258		1,347		10,882		910,891		921,773		—
Farm		855		7		95		957		310,045		311,002		—
Non-Owner Occupied CRE		1,840		19		1,374		3,233		850,488		853,721		—
Owner Occupied CRE		3,269		—		70		3,339		1,029,506		1,032,845		—
Residential		13,804		414		2,540		16,758		1,901,815		1,918,573		—
Total Real Estate		29,045		698		5,426		35,169		5,002,745		5,037,914		—
Consumer:
Auto		967		120		—		1,087		548,750		549,837		—
Non-Auto		219		13		—		232		151,016		151,248		—
Total Consumer		1,186		133		—		1,319		699,766		701,085		—
Total	$	37,342	$	1,081	$	7,091	$	45,514	$	7,183,896	$	7,229,410	$	33

March 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
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

December 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	8,789	$	1,624	$	1,700	$	12,113	$	1,152,698	$	1,164,811	$	141
Municipal		102		—		—		102		214,748		214,850		—
Total Commercial		8,891		1,624		1,700		12,215		1,367,446		1,379,661		141
Agricultural		850		246		4		1,100		83,790		84,890		—
Real Estate:
Construction & Development		8,887		2,115		1,856		12,858		950,300		963,158		863
Farm		1,024		195		—		1,219		343,735		344,954		—
Non-Owner Occupied CRE		3,565		—		—		3,565		824,404		827,969		—
Owner Occupied CRE		2,818		240		1,823		4,881		1,032,400		1,037,281		—
Residential		12,293		828		2,816		15,937		1,818,656		1,834,593		—
Total Real Estate		28,587		3,378		6,495		38,460		4,969,495		5,007,955		863
Consumer:
Auto		1,482		251		24		1,757		520,102		521,859		—
Non-Auto		341		51		—		392		154,034		154,426		—
Total Consumer		1,823		302		24		2,149		674,136		676,285		—
Total	$	40,151	$	5,550	$	8,223	$	53,924	$	7,094,867	$	7,148,791	$	1,004

* 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 troubled debt restructuring ("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, 2024 and 2023, respectively, loan modifications made to borrowers experiencing financial difficulty was insignificant.

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Loans Held for Sale

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Loans Held for Sale

Note 4 - Loans Held-for-Sale

Loans held-for-sale totaled $16,109,000, $11,996,000 and $14,253,000 at March 31, 2024 and 2023, and December 31, 2023, respectively. At March 31, 2024 and 2023, and December 31, 2023, $1,029,000, $230,000 and $3,176,000, 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.

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Derivative Financial Instruments

3 Months Ended

Mar. 31, 2024

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 3 in the fair value disclosures (see Note 9).

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, 2024:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	53,206	$	803	$	—
Forward mortgage-backed securities trades		70,000		—		91

March 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	58,706	$	827	$	—
Forward mortgage-backed securities trades		69,500		—		334

December 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	28,956	$	427	$	—
Forward mortgage-backed securities trades		35,000		—		288

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Borrowings

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Borrowings

Note 6 – Borrowings

Borrowings consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Securities sold under agreements with customers to repurchase	$	307,297	$	608,299	$	381,928
Federal funds purchased		5,750		3,575		1,100
Other borrowings		21,053		21,053		21,053
Total	$	334,100	$	632,927	$	404,081

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, 2023, 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, 2024.

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.

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Income Taxes

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

Income Taxes

Note 7 - Income Taxes

Income tax expense was $11,480,000 for the first quarter of 2024 as compared to $11,688,000 for the same period in 2023. The Company’s effective tax rates on pretax income were 17.70% and 18.19% for the first quarters of 2024 and 2023, 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 $978,000 at March 31, 2024, and $131,000 at March 31, 2023, and $615,000 at December 31, 2023, respectively, 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 to qualifying eligible projects over a sever year period. The Company's equity investments in the CDEs is amortized using the proportional amortization method and related tax credits are allocated to the Company. At March 31, 2024, March 31, 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023, the consolidated balance sheet of the Company included CDE investments in other assets of $25,411,000, $26,553,000, and $25,738,000, respectively.

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Stock Based Compensation

3 Months Ended

Mar. 31, 2024

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, 2024, the Company had 1,617,290 shares of stock remaining for issuance under the plan. The 2021 Plan supersedes all prior stock option and restricted stock plans with shares previously reserved for issuance under such plans cancelled.

Restricted Stock Units

Under the 2021 Plan, the Company grants restricted stock units under compensation 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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		53,817		$	37.04		39,657		$	47.83
Grants		—			—		—			—
Vesting		—			—		—			—
Forfeited/expired		(599	)		33.89		(2,888	)		47.87
Balance at end of period		53,218		$	37.07		36,769		$	47.83

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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		75,227		$	40.24		47,082		$	48.00
Grants		—			—		—			—
Vesting		(20,532	)		48.91		—			—
Forfeited/expired		(686	)		35.61		(3,456	)		48.04
Balance at end of period		54,009		$	37.00		43,626		$	48.00

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,
	2024				2023
	Restricted Stock Outstanding		Weighted Average Grant Date Fair Value		Restricted Stock Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		25,190	$	27.79		24,813		$	36.21
Grants		—		—		—			—
Vesting		—		—		(2,872	)		28.25
Forfeited/expired		—		—		(1,105	)		29.70
Balance at end of period		25,190	$	27.79		20,836		$	37.53

The total fair value of restricted stock vested for the three-months ended March 31, 2024 and 2023, was $650,000 and $98,000, respectively.

The Company recorded restricted stock unit, performance-based restricted stock unit and restricted stock award expense for employees of $469,000 and $358,000 for the three-months ended March 31, 2024 and 2023, respectively. The Company recorded director expense related to these restricted stock grants of $175,000 and $150,000, for the three-months ended March 31, 2024 and 2023, respectively.

As of March 31, 2024 and 2023, there were $2,514,000 and $2,576,000, 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 1.14 years and 1.17 years, respectively. At March 31, 2024 and 2023, and December 31, 2023, there was $111,000, $82,000 and $124,000, 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 grants from the 2021 Plan provided that 20% of the options granted vest and are exercisable after one year from the date of grant and the remaining options vest and are exercisable at a rate of 20% each year thereafter and have a 10-year term. Shares are issued under the 2012 Plan and the 2021 Plan from available authorized shares. An analysis of stock option activity for the three-months ended March 31, 2024 is presented in the table and narrative below:​​​​​​​

	Shares			Weighted- Average Ex. Price
Outstanding, December 31, 2023		1,552,249		$	30.45
Granted		—			—
Exercised		(82,614	)		20.77
Cancelled		(21,692	)		36.49
Outstanding, March 31, 2024		1,447,943			30.91
Exercisable, March 31, 2024		813,657		$	25.85

The options outstanding at March 31, 2024 had exercise prices ranging between $16.95 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 $485,000 and $444,000 for the three-months ended March 31, 2024 and 2023, respectively.

As of March 31, 2024, there was $4,723,000 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 1.44 years. The total fair value of shares vested during the three-months ended March 31, 2024 and 2023 was $46,000 and $15,000, respectively.

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Fair Value Disclosures

3 Months Ended

Mar. 31, 2024

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, 2024 and 2023, and the year ended December 31, 2023.

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, 2024	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	432,168	$	—		$	—	$	432,168
Obligations of state and political subdivisions		—		1,454,035			—		1,454,035
Corporate bonds		—		99,717			—		99,717
Residential mortgage-backed securities		—		2,299,277			—		2,299,277
Commercial mortgage-backed securities		—		368,906			—		368,906
Other securities		4,423		—			—		4,423
Total	$	436,591	$	4,221,935		$	—	$	4,658,526
Loans held-for-sale	$	—	$	15,080		$	—	$	15,080
IRLCs	$	—	$	—		$	803	$	803
Forward mortgage-backed securities trades	$	—	$	(91	)	$	—	$	(91	)

March 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	488,242	$	—		$	—	$	488,242
Obligations of states 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	)

December 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	482,234	$	—		$	—	$	482,234
Obligations of state and political subdivisions		—		1,497,157			—		1,497,157
Corporate bonds		—		100,471			—		100,471
Residential mortgage-backed securities		—		2,364,092			—		2,364,092
Commercial mortgage-backed securities		—		284,324			—		284,324
Other securities		4,484		—			—		4,484
Total	$	486,718	$	4,246,044		$	—	$	4,732,762
Loans held-for-sale	$	—	$	11,077		$	—	$	11,077
IRLCs	$	—	$	—		$	427	$	427
Forward mortgage-backed securities trades	$	—	$	(288	)	$	—	$	(288	)

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,
	2024		2023		2023
Unpaid principal balance on loans held-for-sale	$	14,701	$	11,416	$	10,757
Net unrealized gains on loans held-for-sale		379		350		320
Loans held-for-sale at fair value	$	15,080	$	11,766	$	11,077

The following table summarizes the Company’s gains on sale and fees of mortgage loans for the three-months ended March 31, 2024 and 2023 (dollars in thousand):

	Three-Months Ended March 31,
	2024		2023
Realized gain on sale and fees on mortgage loans*	$	2,580	$	2,859
Change in fair value on loans held-for-sale and IRLCs		351		534
Change in forward mortgage-backed securities trades		197		(419	)
Total gain on sale of mortgage loans	$	3,128	$	2,974

* 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, 2024, March 31, 2023, or December 31, 2023. No significant credit losses were recognized on mortgage loans held-for-sale for the three-months ended March 31, 2024 and 2023.

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, 2024 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, 2024 and 2023.

At March 31, 2024 and 2023, and December 31, 2023, other real estate owned totaled $937,000, $175,000, and $483,000, respectively.

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,
	2024						2023						2023
	Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Fair Value Hierarchy
Cash and due from banks	$	222,464		$	222,464		$	224,875		$	224,875		$	281,354		$	281,354		Level 1
Federal funds sold		12,300			12,300			—			—			—			—		Level 1
Interest-bearing demand deposits    in banks		365,397			365,397			221,336			221,336			255,237			255,237		Level 1
Available-for-sale securities		4,658,526			4,658,526			5,298,557			5,298,557			4,732,762			4,732,762		Levels 1 and 2
Loans held-for-investment, net of    allowance for credit losses		7,139,847			7,141,043			6,495,397			6,464,027			7,060,057			7,036,722		Level 3
Loans held-for-sale		16,109			16,109			11,996			12,018			14,253			14,378		Level 2
Accrued interest receivable		56,278			56,278			50,658			50,658			58,544			58,544		Level 2
Deposits with stated maturities		938,541			938,459			739,498			736,434			938,980			938,534		Level 2
Deposits with no stated maturities		10,351,267			10,351,267			10,196,920			10,196,920			10,199,320			10,199,320		Level 1
Repurchase Agreements		307,297			307,297			608,299			608,299			381,928			381,928		Level 2
Borrowings		26,803			26,803			24,628			24,628			22,153			22,153		Level 2
Accrued interest payable		8,362			8,362			3,617			3,617			10,215			10,215		Level 2
IRLCs		803			803			827			827			427			427		Level 3
Forward mortgage-backed securities    trades asset (liability)		(91	)		(91	)		(334	)		(334	)		(288	)		(288	)	Level 2

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Subsequent Event

3 Months Ended

Mar. 31, 2024

Subsequent Events [Abstract]

Subsequent Event

Note 10 - Subsequent Events

Effective April 22, 2024, First Financial Bank, N.A. and First Financial Trust and Asset Management Company, N.A. converted their charters to a Texas state banking association and a Texas chartered trust company, respectively. The Bank is now a Texas banking association chartered and regulated by the Texas Department of Banking and Trust Company is now a Texas trust company chartered and regulated by the Texas Department of Banking. The Bank will continue to be a member bank of the Federal Reserve system and maintain FDIC deposit insurance.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

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, 2024. The Company’s subsidiary bank is First Financial Bank. 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 is located. In addition, the Company also owns First Financial Trust & Asset Management Company, First Financial Insurance Agency, Inc. (inactive), First Technology Services, Inc., FFB Investment Paris Fund, LLC, and FFB Portfolio Management, Inc.

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. On July 25, 2023, the Company's Board of Directors renewed the prior authorization through July 31, 2024. 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. Under the current authorization, the Company has repurchased and retired 101,337 shares (all during September 2023) at an average price of $26.99 per share.

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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. 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 based upon the amendments provided in ASU 2022-06 discussed below, can generally be applied through December 31, 2024. 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 became 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.

ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848." ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance provided by ASU 2020-04 and ASU 2021-01, which are discussed above. ASU 2022-06, which was effective upon issuance, defers the sunset date of this prior guidance from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief guidance in Topic 848. The adoption of ASU 2022-06 did not have a significant impact on our financial statements.

ASU 2023-02, "Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method." ASU 2023-02 is intended to improve the accounting and disclosures for investments in tax credit structures. ASU 2023-02 allows entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. Previously, this method was only available for qualifying tax equity investments in low-income housing tax credit structures. ASU 2023-02 has been early adopted by the Company as it relates to the qualifying investments that are generating New Market Tax Credits. The adoption of ASU 2023-02 did not have a significant impact on our financial statements.

ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” ASU 2023-09 requires entities to disclose more detailed information in their reconciliation of their statutory tax rate to their effective tax rate. Public business entities (PBEs) are required to provide this incremental detail in a numerical, tabular format. The ASU also requires entities to disclose more detailed information about income taxes paid, including by jurisdiction; pretax income (or loss) from continuing operations; and income tax expense (or benefit). PBEs will be required to adopt the new requirements in annual reporting periods beginning after December 15, 2024, and interim periods beginning after December 15, 2025. The adoption of ASU 2023-09 is not expected to 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, 2024 or 2023, respectively.

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 if 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, 2024 and 2023, and December 31, 2023, 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, 2024 and 2023, and December 31, 2023, 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. 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 based on the risk perceived in concentrations of the loan portfolio, changes in economic conditions, early delinquencies, and factors related to credit administrations, including, among others, underwriting standards, loan-to-value ratios, and borrowers’ risk rating; and (3) individual allowances on loans where borrowers are experiencing financial difficulty or when the Company determines that the foreclosure is probable.

In calculating the allowance for credit losses, most loans are segmented into pools based upon similar characteristics and risk profiles. Common characteristics and risk profiles include the type/purpose of loan, underlying collateral, geographical similarity and historical/expected credit loss patterns. In developing these loan pools for the purposes of modeling expected credit losses, we also analyzed the degree of correlation in how loans within each portfolio respond when subjected to varying economic conditions and scenarios as well as other portfolio stress factors. For modeling purposes, our loan portfolio segments include C&I, Municipal, Agricultural, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE, Residential, Consumer Auto and Consumer Non-Auto. We periodically reassess each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. Refer to Note 3 for more details on the Company’s portfolio segments.

The Company applies two methodologies to estimate the allowance on its pooled portfolio segments; discounted cash flows method and weighted average remaining life method. Allowance estimates on the following portfolio segments are calculated using the discounted cash flows method: C&I, Municipal, Construction and Development, Farm, Non-Owner Occupied and Owner Occupied CRE and Residential. Allowance estimates on the following portfolio segments are calculated using the remaining life method: Agriculture, Consumer Auto and Consumer Non-Auto. The models related to these methodologies utilize the Company’s historical default and loss experience adjusted for future economic forecasts. The reasonable and supportable forecast period represents a one-year economic outlook for the applicable economic variables. Following the end of the reasonable and supportable forecast period, expected losses revert back to the historical mean over the next two years on a straight-line basis. Economic variables that have the most significant impact on the allowance include: Texas unemployment rate, Texas house price index and Texas retail sales index. Contractual loan level cash flows within the discounted cash flows methodology are adjusted for the Company’s historical prepayment and curtailment rate experience.

In some cases, management may determine that an individual loan exhibits unique risk characteristics which differentiate the loan from other loans within our loan pools. In such cases, the loans are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. Specific allocations of the allowance for credit losses are determined by analyzing the borrower’s ability to repay amounts owed, collateral deficiencies, the relative risk rating of the loan and economic conditions affecting the borrower’s industry, among other things. A loan is considered to be collateral dependent when, based upon management’s assessment, the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the sale of the collateral. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for estimated selling costs if satisfaction of the loan depends on the sale of the collateral. We reevaluate the fair value of collateral supporting collateral dependent loans on an ongoing basis.

Management qualitatively adjusts model results for risk factors that are not considered within our modeling processes but are nonetheless relevant in assessing the expected credit losses within our loan pools. These qualitative factor (“Q-Factor”) adjustments may increase management’s estimate of expected credit losses based upon the estimated level of risk within the risk factor. The various risk factors 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, 2024 and 2023, and December 31, 2023, the Company’s reserve for unfunded commitments totaled $7,455,000, $10,397,000 and $7,903,000, 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, and is included in other assets in the consolidated balance sheet. 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 ACL. 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 during the three-months ended March 31, 2024 or 2023, 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 $441,227,000, $458,249,000 and $403,298,000 at March 31, 2024, and 2023, and December 31, 2023, 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, 2024, and 2023, and December 31, 2023, deferred tax assets totaled $122,844,000, $122,947,000 and $110,800,000, 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 three, 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 performance stock units which vest over a three-year period based on Company performance metrics relative to a defined peer group. 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 determined 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 417,000 and 480,000 anti-dilutive shares for the three-months ended March 31, 2024 and 2023, 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, 2024:
Net earnings per share, basic	$	53,397		142,724,674	$	0.37
Effect of stock options and stock grants		—		304,775		—
Net earnings per share, diluted	$	53,397		143,029,449	$	0.37

	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

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024:
Net earnings per share, basic	$	53,397		142,724,674	$	0.37
Effect of stock options and stock grants		—		304,775		—
Net earnings per share, diluted	$	53,397		143,029,449	$	0.37

	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

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Securities (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	445,399	$	—	$	(13,231	)	$	432,168
Obligations of states and political subdivisions		1,592,523		570		(139,058	)		1,454,035
Residential mortgage-backed securities		2,685,896		72		(386,691	)		2,299,277
Commercial mortgage-backed securities		381,198		52		(12,344	)		368,906
Corporate bonds and other		112,501		—		(8,361	)		104,140
Total securities available-for-sale	$	5,217,517	$	694	$	(559,685	)	$	4,658,526

	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

	December 31, 2023
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost Basis		Holding Gains		Holding Losses			Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	496,975	$	4	$	(14,745	)	$	482,234
Obligations of states and political subdivisions		1,621,405		934		(125,182	)		1,497,157
Residential mortgage-backed securities		2,716,968		7		(352,883	)		2,364,092
Commercial mortgage-backed securities		295,663		—		(11,339	)		284,324
Corporate bonds and other		112,670		—		(7,715	)		104,955
Total securities available-for-sale	$	5,243,681	$	945	$	(511,864	)	$	4,732,762

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, 2024, by contractual and expected maturity, are shown below (dollars in thousands):

	Amortized		Estimated
	Cost Basis		Fair Value
Due within one year	$	343,112	$	337,823
Due after one year through five years		1,374,546		1,288,485
Due after five years through ten years		2,421,721		2,126,343
Due after ten years		1,078,138		905,875
Total	$	5,217,517	$	4,658,526

Continuous Unrealized-Loss Position of Available-for-Sale Securities

The following tables disclose as of March 31, 2024 and 2023, and December 31, 2023, 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, 2024	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	2,438	$	16	$	429,730	$	13,215	$	432,168	$	13,231
Obligations of states and political subdivisions		33,073		114		1,398,108		138,944	$	1,431,181		139,058
Residential mortgage-backed securities		22,586		299		2,261,311		386,392	$	2,283,897		386,691
Commercial mortgage-backed securities		64,721		507		275,924		11,837	$	340,645		12,344
Corporate bonds and other		—		—		104,140		8,361	$	104,140		8,361
Total	$	122,818	$	936	$	4,469,213	$	558,749	$	4,592,031	$	559,685

	Less than 12 Months				12 Months or Longer				Total
March 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
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
December 31, 2023	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	3,477	$	7	$	477,306	$	14,738	$	480,783	$	14,745
Obligations of states and political subdivisions		11,855		34		1,427,975		125,148		1,439,830		125,182
Residential mortgage-backed securities		1,631		1		2,361,089		352,882		2,362,720		352,883
Commercial mortgage-backed securities		—		—		284,324		11,339		284,324		11,339
Corporate bonds and other		—		—		104,955		7,715		104,955		7,715
Total	$	16,963	$	42	$	4,655,649	$	511,822	$	4,672,612	$	511,864

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Loans Held for Investment and Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2024

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,
	2024			2023			2023
Commercial:
C&I	$	1,191,516		$	954,686		$	1,164,811
Municipal		211,013			221,379			214,850
Total Commercial		1,402,529			1,176,065			1,379,661
Agricultural		87,882			77,017			84,890
Real Estate:
Construction & Development		921,773			921,190			963,158
Farm		311,002			307,706			344,954
Non-Owner Occupied CRE		853,721			737,117			827,969
Owner Occupied CRE		1,032,845			1,043,018			1,037,281
Residential		1,918,573			1,628,841			1,834,593
Total Real Estate		5,037,914			4,637,872			5,007,955
Consumer:
Auto		549,837			537,410			521,859
Non-Auto		151,248			147,851			154,426
Total Consumer		701,085			685,261			676,285
Total Loans		7,229,410			6,576,215			7,148,791
Less: Allowance for credit losses		(89,562	)		(80,818	)		(88,734	)
Loans, net	$	7,139,848		$	6,495,397		$	7,060,057

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,
	2024		2023		2023
Nonaccrual loans	$	36,157	$	24,171	$	33,609
Loans still accruing and past due 90 days or more		33		22		1,004
Total nonperforming loans	$	36,190	$	24,193	$	34,613

Schedule of Non-Accrual Loans

Nonaccrual loans at March 31, 2024 and 2023, and December 31, 2023, consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Commercial:
C&I	$	3,950	$	5,343	$	4,132
Municipal		—		—		—
Total Commercial		3,950		5,343		4,132
Agricultural		2,043		161		155
Real Estate:
Construction & Development		1,976		773		1,444
Farm		4,597		452		4,804
Non-Owner Occupied CRE		9,243		2,907		8,022
Owner Occupied CRE		5,719		6,823		6,822
Residential		7,815		7,232		7,649
Total Real Estate		29,350		18,187		28,741
Consumer:
Auto		486		398		464
Non-Auto		328		82		117
Total Consumer		814		480		581
Total	$	36,157	$	24,171	$	33,609

Changes in Allowance for Loan Losses

Summary information on the allowance for credit losses for the three-months ended March 31, 2024 and 2023, are outlined by portfolio segment in the following tables (dollars in thousands):

Three-Months Ended March 31, 2024	C&I			Municipal		Agricultural			Construction & Development			Farm
Beginning balance	$	15,698		$	195	$	1,281		$	28,553		$	2,914
Provision for loan losses		501			—		2,017			(3,709	)		(397	)
Recoveries		111			—		5			—			—
Charge-offs		(204	)		—		(60	)		(33	)		—
Ending balance	$	16,106		$	195	$	3,243		$	24,811		$	2,517

Three-Months Ended March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE			Residential		Auto			Non-Auto			Total
Beginning balance	$	13,425	$	13,813		$	11,654	$	810		$	391		$	88,734
Provision for loan losses		1,536		(1,099	)		1,813		384			210			1,256
Recoveries		7		42			98		112			47			422
Charge-offs		—		—			—		(399	)		(154	)		(850	)
Ending balance	$	14,968	$	12,756		$	13,565	$	907		$	494		$	89,562

Three-Months Ended March 31, 2023	C&I			Municipal		Agricultural			Construction & Development		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 Occupied CRE			Owner Occupied CRE		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

Schedule of loans that are individually evaluated for credit losses

The Company’s loans that are individually evaluated for credit losses (both collateral and non-collateral dependent) and their related allowances as of March 31, 2024 and 2023, and December 31, 2023, are summarized in the following tables by loan segment (dollars in thousands):

March 31, 2024	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	756	$	3,194	$	37,504	$	41,454	$	1,541	$	4,170	$	5,711
Municipal		—		—		559		559		—		—		—
Total Commercial		756		3,194		38,063		42,013		1,541		4,170		5,711
Agricultural		713		1,330		4,044		6,087		849		1,881		2,730
Real Estate:
Construction & Development		903		1,073		28,953		30,929		189		2,054		2,243
Farm		—		4,597		1,936		6,533		727		31		758
Non-Owner Occupied CRE		1,850		7,393		22,412		31,655		1,235		1,772		3,007
Owner Occupied CRE		2,827		2,892		35,460		41,179		445		1,793		2,238
Residential		4,404		3,411		31,456		39,271		242		2,014		2,256
Total Real Estate		9,984		19,366		120,217		149,567		2,838		7,664		10,502
Consumer:
Auto		—		486		2,342		2,828		1		4		5
Non-Auto		—		328		764		1,092		72		57		129
Total Consumer		—		814		3,106		3,920		73		61		134
Total	$	11,453	$	24,704	$	165,430	$	201,587	$	5,301	$	13,776	$	19,077

March 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
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

December 31, 2023	Collateral Dependent Loans Individually Evaluated for Credit Losses Without an Allowance		Collateral Dependent Loans Individually Evaluated for Credit Losses With an Allowance		Non-Collateral Dependent Loans Individually Evaluated for Credit Losses		Total Loans Individually Evaluated for Credit Losses		Related Allowance on Collateral Dependent Loans		Related Allowance on Non-Collateral Dependent Loans		Total Allowance for Credit Losses on Loans Individually Evaluated for Credit Losses
Commercial:
C&I	$	1,322	$	2,810	$	18,633	$	22,765	$	1,363	$	4,495	$	5,858
Municipal		—		—		733		733		—		—		—
Total Commercial		1,322		2,810		19,366		23,498		1,363		4,495		5,858
Agricultural		57		98		1,304		1,459		50		700		750
Real Estate:
Construction & Development		758		686		22,545		23,989		148		2,253		2,401
Farm		—		4,804		1,362		6,166		937		57		994
Non-Owner Occupied CRE		1,919		6,103		29,117		37,139		700		2,984		3,684
Owner Occupied CRE		4,661		2,161		35,746		42,568		232		1,431		1,663
Residential		3,909		3,740		30,257		37,906		360		1,799		2,159
Total Real Estate		11,247		17,494		119,027		147,768		2,377		8,524		10,901
Consumer:
Auto		—		464		2,125		2,589		1		3		4
Non-Auto		—		117		782		899		—		60		60
Total Consumer		—		581		2,907		3,488		1		63		64
Total	$	12,626	$	20,983	$	142,604	$	176,213	$	3,791	$	13,782	$	17,573

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, 2024 and 2023, and December 31, 2023, 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, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,711	$	—	$	2,730	$	2,243	$	758
Loans collectively evaluated for credit losses		10,395		195		513		22,568		1,759
Total	$	16,106	$	195	$	3,243	$	24,811	$	2,517

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,007	$	2,238	$	2,256	$	5	$	129	$	19,077
Loans collectively evaluated for credit losses		11,961		10,518		11,309		902		365		70,485
Total	$	14,968	$	12,756	$	13,565	$	907	$	494	$	89,562

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	5,858	$	—	$	750	$	2,401	$	994
Loans collectively evaluated for credit losses		9,840		195		531		26,152		1,920
Total	$	15,698	$	195	$	1,281	$	28,553	$	2,914

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	3,684	$	1,663	$	2,159	$	4	$	60	$	17,573
Loans collectively evaluated for credit losses		9,741		12,150		9,495		806		331		71,161
Total	$	13,425	$	13,813	$	11,654	$	810	$	391	$	88,734

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, 2024 and 2023, and December 31, 2023, related to the balance in the allowance for credit losses follows below (dollars in thousands):

March 31, 2024	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	41,454	$	559	$	6,087	$	30,929	$	6,533
Loans collectively evaluated for credit losses		1,150,062		210,454		81,795		890,844		304,469
Total	$	1,191,516	$	211,013	$	87,882	$	921,773	$	311,002

March 31, 2024 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	31,655	$	41,179	$	39,271	$	2,828	$	1,092	$	201,587
Loans collectively evaluated for credit losses		822,066		991,666		1,879,302		547,009		150,156		7,027,823
Total	$	853,721	$	1,032,845	$	1,918,573	$	549,837	$	151,248	$	7,229,410

March 31, 2023	C&I		Municipal		Agricultural		Construction & Development		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 Occupied CRE		Owner Occupied CRE		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

December 31, 2023	C&I		Municipal		Agricultural		Construction & Development		Farm
Loans individually evaluated for credit losses	$	22,765	$	733	$	1,459	$	23,989	$	6,166
Loans collectively evaluated for credit losses		1,142,046		214,117		83,431		939,169		338,788
Total	$	1,164,811	$	214,850	$	84,890	$	963,158	$	344,954

December 31, 2023 (continued)	Non-Owner Occupied CRE		Owner Occupied CRE		Residential		Auto		Non-Auto		Total
Loans individually evaluated for credit losses	$	37,139	$	42,568	$	37,906	$	2,589	$	899	$	176,213
Loans collectively evaluated for credit losses		790,830		994,713		1,796,687		519,270		153,527		6,972,578
Total	$	827,969	$	1,037,281	$	1,834,593	$	521,859	$	154,426	$	7,148,791

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, 2024 (dollars in millions):

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	236	$	551	$	226	$	70	$	32	$	36	$	—	$	1,151
Special mention		6		17		1		—		—		—		—		24
Substandard		2		10		1		1		2		1		—		17
Doubtful		—		—		—		—		—		—		—		—
Total	$	244	$	578	$	228	$	71	$	34	$	37	$	—	$	1,192
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	5	$	20	$	81	$	15	$	10	$	79	$	—	$	210
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		1		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	5	$	20	$	81	$	16	$	10	$	79	$	—	$	211
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	18	$	54	$	6	$	3	$	1	$	—	$	—	$	82
Special mention		—		1		—		—		—		—		—		1
Substandard		3		1		—		—		—		1		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	21	$	56	$	6	$	3	$	1	$	1	$	—	$	88
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	117	$	438	$	240	$	63	$	19	$	14	$	—	$	891
Special mention		7		6		3		—		—		—		—		16
Substandard		1		7		1		6		—		—		—		15
Doubtful		—		—		—		—		—		—		—		—
Total	$	125	$	451	$	244	$	69	$	19	$	14	$	—	$	922
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	23	$	58	$	101	$	71	$	23	$	29	$	—	$	305
Special mention		—		1		—		—		—		—		—		1
Substandard		—		1		—		—		4		—		—		5
Doubtful		—		—		—		—		—		—		—		—
Total	$	23	$	60	$	101	$	71	$	27	$	29	$	—	$	311
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	59	$	133	$	244	$	174	$	104	$	108	$	—	$	822
Special mention		—		—		—		1		1		1		—		3
Substandard		—		2		1		3		7		16		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	59	$	135	$	245	$	178	$	112	$	125	$	—	$	854
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	28	$	155	$	305	$	202	$	110	$	190	$	—	$	990
Special mention		—		2		1		8		—		—		—		11
Substandard		—		2		6		5		1		18		—		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	28	$	159	$	312	$	215	$	111	$	208	$	—	$	1,033
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	130	$	450	$	424	$	302	$	151	$	281	$	141	$	1,879
Special mention		—		1		1		1		1		2		1		7
Substandard		2		7		4		4		2		10		3		32
Doubtful		—		—		—		—		—		—		—		—
Total	$	132	$	458	$	429	$	307	$	154	$	293	$	145	$	1,918
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	91	$	175	$	188	$	64	$	22	$	8	$	—	$	548
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		1		—		—		—		2
Doubtful		—		—		—		—		—		—		—		—
Total	$	91	$	175	$	189	$	65	$	22	$	8	$	—	$	550
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	18	$	59	$	41	$	20	$	3	$	2	$	7	$	150
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	18	$	60	$	41	$	20	$	3	$	2	$	7	$	151
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

March 31,	2024		2023		2022		2021		2020		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	725	$	2,093	$	1,856	$	984	$	475	$	747	$	148	$	7,028
Special mention		13		28		6		10		2		3		1		63
Substandard		8		31		14		21		16		46		3		139
Doubtful		—		—		—		—		—		—		—		—
Total	$	746	$	2,152	$	1,876	$	1,015	$	493	$	796	$	152	$	7,230
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, 2023 (dollars in millions):

March 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 Loans Amortized Cost Basis		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 December 31, 2023 (dollars in millions):

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
C&I
Risk rating:
Pass	$	720	$	276	$	73	$	36	$	14	$	23	$	—	$	1,142
Special mention		1		1		—		—		1		—		—		3
Substandard		12		2		2		1		1		2		—		20
Doubtful		—		—		—		—		—		—		—		—
Total	$	733	$	279	$	75	$	37	$	16	$	25	$	—	$	1,165
Year-to-Date Gross Charge-Offs	$	—	$	—	$	1	$	—	$	—	$	—	$	—	$	1

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Municipal
Risk rating:
Pass	$	25	$	83	$	15	$	10	$	1	$	80	$	—	$	214
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		1		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	25	$	83	$	16	$	10	$	1	$	80	$	—	$	215
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Agricultural
Risk rating:
Pass	$	63	$	15	$	4	$	1	$	1	$	—	$	—	$	84
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	64	$	15	$	4	$	1	$	1	$	—	$	—	$	85
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Construction & Development
Risk rating:
Pass	$	515	$	311	$	78	$	20	$	9	$	6	$	—	$	939
Special mention		8		2		—		—		—		—		—		10
Substandard		9		4		1		—		—		—		—		14
Doubtful		—		—		—		—		—		—		—		—
Total	$	532	$	317	$	79	$	20	$	9	$	6	$	—	$	963
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Farm
Risk rating:
Pass	$	101	$	111	$	73	$	24	$	8	$	22	$	—	$	339
Special mention		—		—		—		—		—		—		—		—
Substandard		—		—		—		5		—		1		—		6
Doubtful		—		—		—		—		—		—		—		—
Total	$	101	$	111	$	73	$	29	$	8	$	23	$	—	$	345
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Owner Occupied CRE
Risk rating:
Pass	$	167	$	232	$	172	$	106	$	41	$	73	$	—	$	791
Special mention		—		5		1		—		—		2		—		8
Substandard		2		1		2		7		13		4		—		29
Doubtful		—		—		—		—		—		—		—		—
Total	$	169	$	238	$	175	$	113	$	54	$	79	$	—	$	828
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Owner Occupied CRE
Risk rating:
Pass	$	154	$	305	$	217	$	114	$	62	$	142	$	—	$	994
Special mention		1		1		4		—		1		1		—		8
Substandard		3		6		4		—		7		15		—		35
Doubtful		—		—		—		—		—		—		—		—
Total	$	158	$	312	$	225	$	114	$	70	$	158	$	—	$	1,037
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Residential
Risk rating:
Pass	$	477	$	415	$	313	$	158	$	67	$	229	$	138	$	1,797
Special mention		1		2		2		2		—		3		1		11
Substandard		4		4		3		3		3		7		3		27
Doubtful		—		—		—		—		—		—		—		—
Total	$	482	$	421	$	318	$	163	$	70	$	239	$	142	$	1,835
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Auto
Risk rating:
Pass	$	195	$	212	$	74	$	26	$	10	$	2	$	—	$	519
Special mention		—		—		—		—		—		—		—		—
Substandard		—		1		1		1		—		—		—		3
Doubtful		—		—		—		—		—		—		—		—
Total	$	195	$	213	$	75	$	27	$	10	$	2	$	—	$	522
Year-to-Date Gross Charge-Offs	$	—	$	1	$	—	$	—	$	—	$	—	$	—	$	1

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Non-Auto
Risk rating:
Pass	$	71	$	47	$	22	$	4	$	1	$	1	$	7	$	153
Special mention		—		—		—		—		—		—		—		—
Substandard		1		—		—		—		—		—		—		1
Doubtful		—		—		—		—		—		—		—		—
Total	$	72	$	47	$	22	$	4	$	1	$	1	$	7	$	154
Year-to-Date Gross Charge-Offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

December 31,	2023		2022		2021		2020		2019		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Risk rating:
Pass	$	2,488	$	2,007	$	1,041	$	499	$	214	$	578	$	145	$	6,972
Special mention		11		11		7		2		2		6		1		40
Substandard		32		18		14		17		24		29		3		137
Doubtful		—		—		—		—		—		—		—		—
Total	$	2,531	$	2,036	$	1,062	$	518	$	240	$	613	$	149	$	7,149
Year-to-Date Gross Charge-Offs	$	—	$	1	$	1	$	—	$	—	$	—	$	—	$	2

Schedule of Past Due Loans

At March 31, 2024 and 2023, and December 31, 2023, the Company’s past due loans are as follows (dollars in thousands):

March 31, 2024	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	6,462	$	250	$	1,594	$	8,306	$	1,183,210	$	1,191,516	$	33
Municipal		25		—		—		25		210,988		211,013		—
Total Commercial		6,487		250		1,594		8,331		1,394,198		1,402,529		33
Agricultural		624		—		71		695		87,187		87,882		—
Real Estate:
Construction & Development		9,277		258		1,347		10,882		910,891		921,773		—
Farm		855		7		95		957		310,045		311,002		—
Non-Owner Occupied CRE		1,840		19		1,374		3,233		850,488		853,721		—
Owner Occupied CRE		3,269		—		70		3,339		1,029,506		1,032,845		—
Residential		13,804		414		2,540		16,758		1,901,815		1,918,573		—
Total Real Estate		29,045		698		5,426		35,169		5,002,745		5,037,914		—
Consumer:
Auto		967		120		—		1,087		548,750		549,837		—
Non-Auto		219		13		—		232		151,016		151,248		—
Total Consumer		1,186		133		—		1,319		699,766		701,085		—
Total	$	37,342	$	1,081	$	7,091	$	45,514	$	7,183,896	$	7,229,410	$	33

March 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
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

December 31, 2023	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial:
C&I	$	8,789	$	1,624	$	1,700	$	12,113	$	1,152,698	$	1,164,811	$	141
Municipal		102		—		—		102		214,748		214,850		—
Total Commercial		8,891		1,624		1,700		12,215		1,367,446		1,379,661		141
Agricultural		850		246		4		1,100		83,790		84,890		—
Real Estate:
Construction & Development		8,887		2,115		1,856		12,858		950,300		963,158		863
Farm		1,024		195		—		1,219		343,735		344,954		—
Non-Owner Occupied CRE		3,565		—		—		3,565		824,404		827,969		—
Owner Occupied CRE		2,818		240		1,823		4,881		1,032,400		1,037,281		—
Residential		12,293		828		2,816		15,937		1,818,656		1,834,593		—
Total Real Estate		28,587		3,378		6,495		38,460		4,969,495		5,007,955		863
Consumer:
Auto		1,482		251		24		1,757		520,102		521,859		—
Non-Auto		341		51		—		392		154,034		154,426		—
Total Consumer		1,823		302		24		2,149		674,136		676,285		—
Total	$	40,151	$	5,550	$	8,223	$	53,924	$	7,094,867	$	7,148,791	$	1,004

* 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.

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Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	53,206	$	803	$	—
Forward mortgage-backed securities trades		70,000		—		91

March 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	58,706	$	827	$	—
Forward mortgage-backed securities trades		69,500		—		334

December 31, 2023:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	28,956	$	427	$	—
Forward mortgage-backed securities trades		35,000		—		288

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Borrowings (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of Borrowings

Borrowings consisted of the following (dollars in thousands):

	March 31,				December 31,
	2024		2023		2023
Securities sold under agreements with customers to repurchase	$	307,297	$	608,299	$	381,928
Federal funds purchased		5,750		3,575		1,100
Other borrowings		21,053		21,053		21,053
Total	$	334,100	$	632,927	$	404,081

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Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		53,817		$	37.04		39,657		$	47.83
Grants		—			—		—			—
Vesting		—			—		—			—
Forfeited/expired		(599	)		33.89		(2,888	)		47.87
Balance at end of period		53,218		$	37.07		36,769		$	47.83

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, 2024 and 2023.

	For the Three-Months Ended March 31,
	2024					2023
	Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value		Performance-Based Restricted Stock Units Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		75,227		$	40.24		47,082		$	48.00
Grants		—			—		—			—
Vesting		(20,532	)		48.91		—			—
Forfeited/expired		(686	)		35.61		(3,456	)		48.04
Balance at end of period		54,009		$	37.00		43,626		$	48.00

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,
	2024				2023
	Restricted Stock Outstanding		Weighted Average Grant Date Fair Value		Restricted Stock Outstanding			Weighted Average Grant Date Fair Value
Balance at beginning of period		25,190	$	27.79		24,813		$	36.21
Grants		—		—		—			—
Vesting		—		—		(2,872	)		28.25
Forfeited/expired		—		—		(1,105	)		29.70
Balance at end of period		25,190	$	27.79		20,836		$	37.53

Schedule of Analysis of Stock Option Activity

An analysis of stock option activity for the three-months ended March 31, 2024 is presented in the table and narrative below:​​​​​​​

	Shares			Weighted- Average Ex. Price
Outstanding, December 31, 2023		1,552,249		$	30.45
Granted		—			—
Exercised		(82,614	)		20.77
Cancelled		(21,692	)		36.49
Outstanding, March 31, 2024		1,447,943			30.91
Exercisable, March 31, 2024		813,657		$	25.85

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Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	432,168	$	—		$	—	$	432,168
Obligations of state and political subdivisions		—		1,454,035			—		1,454,035
Corporate bonds		—		99,717			—		99,717
Residential mortgage-backed securities		—		2,299,277			—		2,299,277
Commercial mortgage-backed securities		—		368,906			—		368,906
Other securities		4,423		—			—		4,423
Total	$	436,591	$	4,221,935		$	—	$	4,658,526
Loans held-for-sale	$	—	$	15,080		$	—	$	15,080
IRLCs	$	—	$	—		$	803	$	803
Forward mortgage-backed securities trades	$	—	$	(91	)	$	—	$	(91	)

March 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	488,242	$	—		$	—	$	488,242
Obligations of states 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	)

December 31, 2023	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	482,234	$	—		$	—	$	482,234
Obligations of state and political subdivisions		—		1,497,157			—		1,497,157
Corporate bonds		—		100,471			—		100,471
Residential mortgage-backed securities		—		2,364,092			—		2,364,092
Commercial mortgage-backed securities		—		284,324			—		284,324
Other securities		4,484		—			—		4,484
Total	$	486,718	$	4,246,044		$	—	$	4,732,762
Loans held-for-sale	$	—	$	11,077		$	—	$	11,077
IRLCs	$	—	$	—		$	427	$	427
Forward mortgage-backed securities trades	$	—	$	(288	)	$	—	$	(288	)

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,
	2024		2023		2023
Unpaid principal balance on loans held-for-sale	$	14,701	$	11,416	$	10,757
Net unrealized gains on loans held-for-sale		379		350		320
Loans held-for-sale at fair value	$	15,080	$	11,766	$	11,077

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, 2024 and 2023 (dollars in thousand):

	Three-Months Ended March 31,
	2024		2023
Realized gain on sale and fees on mortgage loans*	$	2,580	$	2,859
Change in fair value on loans held-for-sale and IRLCs		351		534
Change in forward mortgage-backed securities trades		197		(419	)
Total gain on sale of mortgage loans	$	3,128	$	2,974

* This includes gains on loans held-for-sale carried under the fair value method and lower of cost or market.

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments

The estimated fair values and carrying values of all financial instruments under current authoritative guidance were as follows (dollars in thousands).

	March 31,												December 31,
	2024						2023						2023
	Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Carrying Value			Estimated Fair Value			Fair Value Hierarchy
Cash and due from banks	$	222,464		$	222,464		$	224,875		$	224,875		$	281,354		$	281,354		Level 1
Federal funds sold		12,300			12,300			—			—			—			—		Level 1
Interest-bearing demand deposits    in banks		365,397			365,397			221,336			221,336			255,237			255,237		Level 1
Available-for-sale securities		4,658,526			4,658,526			5,298,557			5,298,557			4,732,762			4,732,762		Levels 1 and 2
Loans held-for-investment, net of    allowance for credit losses		7,139,847			7,141,043			6,495,397			6,464,027			7,060,057			7,036,722		Level 3
Loans held-for-sale		16,109			16,109			11,996			12,018			14,253			14,378		Level 2
Accrued interest receivable		56,278			56,278			50,658			50,658			58,544			58,544		Level 2
Deposits with stated maturities		938,541			938,459			739,498			736,434			938,980			938,534		Level 2
Deposits with no stated maturities		10,351,267			10,351,267			10,196,920			10,196,920			10,199,320			10,199,320		Level 1
Repurchase Agreements		307,297			307,297			608,299			608,299			381,928			381,928		Level 2
Borrowings		26,803			26,803			24,628			24,628			22,153			22,153		Level 2
Accrued interest payable		8,362			8,362			3,617			3,617			10,215			10,215		Level 2
IRLCs		803			803			827			827			427			427		Level 3
Forward mortgage-backed securities    trades asset (liability)		(91	)		(91	)		(334	)		(334	)		(288	)		(288	)	Level 2

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Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	3 Months Ended		7 Months Ended
	Sep. 30, 2023 $ / shares shares	Mar. 31, 2024 USD ($) Location shares	Mar. 31, 2023 USD ($) shares	Jul. 27, 2021 shares	Dec. 31, 2023 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	$ 26.99
Minimum number of days to consider the loans as non-accrual		90 days	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		$ 441,227,000	$ 458,249,000		403,298,000
First financial antidilutive securities excluded from eps computation | shares		417,000	480,000
Shares repurchased under stock repurchase authorization, shares | shares	101,337
Deferred Tax Assets		$ 122,844,000	$ 122,947,000		110,800,000
Commitments to Extend Credit [Member]
Equity, Class of Treasury Stock [Line Items]
Reserve for unfunded commitments		7,455,000	10,397,000		7,903,000
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

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Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net earnings per share, basic, Net Earnings	$ 53,397	$ 52,568
Effect of stock options and stock grants, Net Earnings	0	0
Net earnings per share, diluted, Net Earnings	$ 53,397	$ 52,568
Net earnings per share, basic, Weighted Average Shares	142,724,674	142,665,646
Effect of stock options and stock grants, Weighted Average Shares	304,775	400,365
Net earnings per share, diluted, Weighted Average Shares	143,029,449	143,066,011
Net earnings per share, basic, Per Share Amount	$ 0.37	$ 0.37
Effect of stock options and stock grants, Per Share Amount	0	0
Net earnings per share, diluted, Per Share Amount	$ 0.37	$ 0.37

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Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 USD ($) Investment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 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	12 months	12 months
Number of investment positions | Investment	832
Securities pledged as collateral	$ 2,516,117,000
Sales of investment securities available-for-sale	0	$ 145,948,000
Gross realized gains from security sales	$ 0	1,052,000
Gross realized losses from security sales or calls		1,040,000
Available-for-Sale Securities [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Sales of investment securities available-for-sale		$ 145,948,000
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	56.31%
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	66.95%

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Securities - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	$ 5,217,517	$ 5,243,681	$ 5,879,040
Securities available-for-sale, Gross Unrealized Holding Gains	694	945	1,611
Securities available-for-sale, Gross Unrealized Holding Losses	(559,685)	(511,864)	(582,094)
Available-for-sale securities	4,658,526	4,732,762	5,298,557
U.S. Treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	445,399	496,975	508,692
Securities available-for-sale, Gross Unrealized Holding Gains	0	4	32
Securities available-for-sale, Gross Unrealized Holding Losses	(13,231)	(14,745)	(20,482)
Available-for-sale securities	432,168	482,234	488,242
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	1,592,523	1,621,405	1,935,401
Securities available-for-sale, Gross Unrealized Holding Gains	570	934	1,562
Securities available-for-sale, Gross Unrealized Holding Losses	(139,058)	(125,182)	(163,351)
Available-for-sale securities	1,454,035	1,497,157	1,773,612
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	2,685,896	2,716,968	2,957,314
Securities available-for-sale, Gross Unrealized Holding Gains	72	7	17
Securities available-for-sale, Gross Unrealized Holding Losses	(386,691)	(352,883)	(374,161)
Available-for-sale securities	2,299,277	2,364,092	2,583,170
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	381,198	295,663	364,956
Securities available-for-sale, Gross Unrealized Holding Gains	52	0	0
Securities available-for-sale, Gross Unrealized Holding Losses	(12,344)	(11,339)	(15,020)
Available-for-sale securities	368,906	284,324	349,936
Corporate Bonds and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	112,501	112,670	112,677
Securities available-for-sale, Gross Unrealized Holding Gains	0	0	0
Securities available-for-sale, Gross Unrealized Holding Losses	(8,361)	(7,715)	(9,080)
Available-for-sale securities	$ 104,140	$ 104,955	$ 103,597

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Securities - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Available-for-Sale, Amortized Cost Basis, Due within one year	$ 343,112
Available-for-Sale, Amortized Cost Basis, Due after one year through five years	1,374,546
Available-for-Sale, Amortized Cost Basis, Due after five years through ten years	2,421,721
Available-for-Sale, Amortized Cost Basis, Due after ten years	1,078,138
Available-for-Sale, Amortized Cost Basis, Total	5,217,517	$ 5,243,681	$ 5,879,040
Available-for-Sale, Estimated Fair Value, Due within one year	337,823
Available-for-Sale, Estimated Fair Value, Due after one year through five years	1,288,485
Available-for-Sale, Estimated Fair Value, Due after five years through ten years	2,126,343
Available-for-Sale, Estimated Fair Value, Due after ten years	905,875
Securities available-for-sale, Estimated Fair Value, Total	$ 4,658,526	$ 4,732,762	$ 5,298,557

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Securities - Continuous Unrealized-Loss Position of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 122,818	$ 16,963	$ 616,799
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	936	42	13,693
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	4,469,213	4,655,649	4,499,790
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	558,749	511,822	568,401
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	4,592,031	4,672,612	5,116,589
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	559,685	511,864	582,094
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	2,438	3,477	191,725
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	16	7	4,193
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	429,730	477,306	292,587
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	13,215	14,738	16,289
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	432,168	480,783	484,312
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	13,231	14,745	20,482
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	33,073	11,855	126,532
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	114	34	1,448
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	1,398,108	1,427,975	1,470,950
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	138,944	125,148	161,903
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	1,431,181	1,439,830	1,597,482
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	139,058	125,182	163,351
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	22,586	1,631	91,738
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	299	1	2,937
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	2,261,311	2,361,089	2,489,524
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	386,392	352,882	371,224
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	2,283,897	2,362,720	2,581,262
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	386,691	352,883	374,161
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	64,721	0	164,301
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	507	0	3,948
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	275,924	284,324	185,635
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	11,837	11,339	11,072
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	340,645	284,324	349,936
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	12,344	11,339	15,020
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	0	0	42,503
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss, Total	0	0	1,167
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	104,140	104,955	61,094
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	8,361	7,715	7,913
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	104,140	104,955	103,597
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	$ 8,361	$ 7,715	$ 9,080

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Loans Held for Investment and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 19,077	$ 17,573		$ 16,845
Loans collectively evaluated for credit losses	70,485	71,161		63,973
Total allowance for loan losses	89,562	88,734	$ 89,562	80,818	$ 75,834
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	5,711	5,858		7,523
Loans collectively evaluated for credit losses	10,395	9,840		8,560
Total allowance for loan losses	16,106	15,698		16,083	16,129
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	0	0		0
Loans collectively evaluated for credit losses	195	195		1,067
Total allowance for loan losses	195	195		1,067	1,026
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,243	2,401		2,397
Loans collectively evaluated for credit losses	22,568	26,152		26,230
Total allowance for loan losses	24,811	28,553		28,627	26,443
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	758	994		0
Loans collectively evaluated for credit losses	1,759	1,920		1,937
Total allowance for loan losses	2,517	2,914		1,937	1,957
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	3,007	3,684		2,081
Loans collectively evaluated for credit losses	11,961	9,741		6,970
Total allowance for loan losses	14,968	13,425	14,968	9,051	9,075
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,238	1,663		2,605
Loans collectively evaluated for credit losses	10,518	12,150		9,343
Total allowance for loan losses	12,756	13,813	12,756	11,948	9,928
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,256	2,159		1,663
Loans collectively evaluated for credit losses	11,309	9,495		8,039
Total allowance for loan losses	13,565	11,654	13,565	9,702	9,075
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	5	4		3
Loans collectively evaluated for credit losses	902	806		854
Total allowance for loan losses	907	810	907	857	845
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	129	60		2
Loans collectively evaluated for credit losses	365	331		330
Total allowance for loan losses	494	391	$ 494	332	315
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,730	750		571
Loans collectively evaluated for credit losses	513	531		643
Total allowance for loan losses	$ 3,243	$ 1,281		$ 1,214	$ 1,041

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Loans Held for Investment and Allowance for Loan Losses - Loans Held-for-Investment by Class of Financing Receivables (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 7,229,410	$ 7,148,791		$ 6,576,215
Total Real Estate	36,157	33,609		24,171
Less: Allowance for credit losses	(89,562)	(88,734)	$ (89,562)	(80,818)	$ (75,834)
Net loans held for investment	7,139,848	7,060,057		6,495,397
C&I [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,191,516	1,164,811		954,686
Less: Allowance for credit losses	(16,106)	(15,698)		(16,083)	(16,129)
Municipal [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	211,013	214,850		221,379
Less: Allowance for credit losses	(195)	(195)		(1,067)	(1,026)
Construction & Development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	921,773	963,158		921,190
Less: Allowance for credit losses	(24,811)	(28,553)		(28,627)	(26,443)
Farm [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	311,002	344,954		307,706
Less: Allowance for credit losses	(2,517)	(2,914)		(1,937)	(1,957)
Non-Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	853,721	827,969		737,117
Less: Allowance for credit losses	(14,968)	(13,425)	(14,968)	(9,051)	(9,075)
Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,032,845	1,037,281		1,043,018
Less: Allowance for credit losses	(12,756)	(13,813)	(12,756)	(11,948)	(9,928)
Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,918,573	1,834,593		1,628,841
Less: Allowance for credit losses	(13,565)	(11,654)	(13,565)	(9,702)	(9,075)
Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	549,837	521,859		537,410
Less: Allowance for credit losses	(907)	(810)	(907)	(857)	(845)
Non-Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	151,248	154,426		147,851
Less: Allowance for credit losses	(494)	(391)	$ (494)	(332)	(315)
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,402,529	1,379,661		1,176,065
Commercial [Member] | C&I [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,191,516	1,164,811		954,686
Commercial [Member] | Municipal [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	211,013	214,850		221,379
Agriculture [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	87,882	84,890		77,017
Less: Allowance for credit losses	(3,243)	(1,281)		(1,214)	$ (1,041)
Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	5,037,914	5,007,955		4,637,872
Real Estate [Member] | Construction & Development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	921,773	963,158		921,190
Real Estate [Member] | Farm [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	311,002	344,954		307,706
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	853,721	827,969		737,117
Real Estate [Member] | Owner Occupied CRE [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,032,845	1,037,281		1,043,018
Real Estate [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,918,573	1,834,593		1,628,841
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	701,085	676,285		685,261
Consumer [Member] | Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	549,837	521,859		537,410
Consumer [Member] | Non-Auto [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	$ 151,248	$ 154,426		$ 147,851

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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, 2024	Dec. 31, 2023	Mar. 31, 2023
Receivables [Abstract]
Non-accrual loans	$ 36,157	$ 33,609	$ 24,171
Loans still accruing and past due 90 days or more	33	1,004	22
Total	$ 36,190	$ 34,613	$ 24,193

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Loans Held for Investment and Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets	$ 37,204,000	$ 24,389,000	$ 35,096,000
Additional funds advanced in connection with impaired loans	0
Loans held by subsidiaries subject to blanket liens	5,095,506,000
Available line of credit	1,984,900,000
line of Credit	0
Undisbursed commitments	781,500,000
Reserve for unfunded commitments (Other liabilities)	7,455,000	10,397,000	7,903,000
Total Loans	7,229,410,000	6,576,215,000	$ 7,148,791,000
Provision for Loan and Lease Losses	1,256,000	4,707,000
Unfunded Loan Commitment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	448,000	1,926,000
Reversal of Provision for credit losses	$ 808,000	$ 2,781,000

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Loans Held for Investment and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 36,157	$ 33,609	$ 24,171
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	3,950	4,132	5,343
Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	3,950	4,132	5,343
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	2,043	155	161
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	29,350	28,741	18,187
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,976	1,444	773
Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	4,597	4,804	452
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	9,243	8,022	2,907
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	5,719	6,822	6,823
Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	7,815	7,649	7,232
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	814	581	480
Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	486	464	398
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 328	$ 117	$ 82

XML

Loans Held for Investment and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 88,734,000	$ 75,834,000
Provision for Loan and Lease Losses	1,256,000	4,707,000
Recoveries	422,000	565,000
Charge-offs	(850,000)	(288,000)
Ending balance	89,562,000	80,818,000
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	15,698,000	16,129,000
Provision for Loan and Lease Losses	501,000	(64,000)
Recoveries	111,000	52,000
Charge-offs	(204,000)	(34,000)
Ending balance	16,106,000	16,083,000
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	195,000	1,026,000
Provision for Loan and Lease Losses	(0)	41,000
Recoveries	0	0
Charge-offs	0	0
Ending balance	195,000	1,067,000
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	28,553,000	26,443,000
Provision for Loan and Lease Losses	(3,709,000)	2,084,000
Recoveries	0	100,000
Charge-offs	(33,000)	0
Ending balance	24,811,000	28,627,000
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,914,000	1,957,000
Provision for Loan and Lease Losses	(397,000)	(20,000)
Recoveries	0	0
Charge-offs	0	0
Ending balance	2,517,000	1,937,000
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13,425,000	9,075,000
Provision for Loan and Lease Losses	1,536,000	(49,000)
Recoveries	7,000	25,000
Charge-offs	0	0
Ending balance	14,968,000	9,051,000
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13,813,000	9,928,000
Provision for Loan and Lease Losses	(1,099,000)	2,013,000
Recoveries	42,000	7,000
Charge-offs	0	0
Ending balance	12,756,000	11,948,000
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	11,654,000	9,075,000
Provision for Loan and Lease Losses	1,813,000	624,000
Recoveries	98,000	3,000
Charge-offs	(0)	0
Ending balance	13,565,000	9,702,000
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	810,000	845,000
Provision for Loan and Lease Losses	384,000	70,000
Recoveries	112,000	132,000
Charge-offs	(399,000)	(190,000)
Ending balance	907,000	857,000
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	391,000	315,000
Provision for Loan and Lease Losses	210,000	36,000
Recoveries	47,000	45,000
Charge-offs	(154,000)	(64,000)
Ending balance	494,000	332,000
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,281,000	1,041,000
Provision for Loan and Lease Losses	2,017,000	(28,000)
Recoveries	5,000	201,000
Charge-offs	(60,000)	0
Ending balance	$ 3,243,000	$ 1,214,000

XML

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, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Impaired [Line Items]
Related Allowance	$ 19,077	$ 17,573	$ 16,845
Total Recorded Investment	201,587	176,213	157,056
Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	11,453	12,626	11,867
Recorded Investment With Allowance	24,704	20,983	12,304
Related Allowance	5,301	3,791	4,434
Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	13,776	13,782	12,411
Total Recorded Investment	165,430	142,604	132,885
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	5,711	5,858	7,523
Total Recorded Investment	42,013	23,498	26,391
Commercial [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	3,194	1,322	0
Recorded Investment With Allowance	756	2,810	5,343
Related Allowance	1,541	1,363	3,582
Commercial [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	4,170	4,495	3,941
Total Recorded Investment	38,063	19,366	21,048
Commercial [Member] | C&I [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	5,711	5,858	7,523
Total Recorded Investment	41,454	22,765	25,484
Commercial [Member] | C&I [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	3,194	1,322	0
Recorded Investment With Allowance	756	2,810	5,343
Related Allowance	1,541	1,363	3,582
Commercial [Member] | C&I [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	4,170	4,495	3,941
Total Recorded Investment	37,504	18,633	20,141
Commercial [Member] | Municipal [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	0
Total Recorded Investment	559	733	907
Commercial [Member] | Municipal [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	0
Recorded Investment With Allowance	0
Related Allowance	0
Commercial [Member] | Municipal [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	0
Total Recorded Investment	559	733	907
Commercial [Member] | Farm [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance		937
Agriculture [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,730	750	571
Total Recorded Investment	6,087	1,459	1,073
Agriculture [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	1,330	57	0
Recorded Investment With Allowance	713	98	161
Related Allowance	849	50	86
Agriculture [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,881	700	485
Total Recorded Investment	4,044	1,304	912
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	10,502	10,901	8,746
Total Recorded Investment	149,567	147,768	127,230
Real Estate [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	19,366	11,247	11,867
Recorded Investment With Allowance	9,984	17,494	6,320
Related Allowance	2,838	2,377	765
Real Estate [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	7,664	8,524	7,981
Total Recorded Investment	120,217	119,027	109,043
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,243	2,401	2,397
Total Recorded Investment	30,929	23,989	19,586
Real Estate [Member] | Construction & Development [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	1,073	758	397
Recorded Investment With Allowance	903	686	376
Related Allowance	189	148	57
Real Estate [Member] | Construction & Development [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,054	2,253	2,340
Total Recorded Investment	28,953	22,545	18,813
Real Estate [Member] | Farm [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	758	994	0
Total Recorded Investment	6,533	6,166	1,684
Real Estate [Member] | Farm [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	4,597	0	452
Recorded Investment With Allowance	0	4,804	0
Related Allowance	727		0
Real Estate [Member] | Farm [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	31	57	0
Total Recorded Investment	1,936	1,362	1,232
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	3,007	3,684	2,081
Total Recorded Investment	31,655	37,139	31,464
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	7,393	1,919	2,136
Recorded Investment With Allowance	1,850	6,103	771
Related Allowance	1,235	700	152
Real Estate [Member] | Non-Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,772	2,984	1,929
Total Recorded Investment	22,412	29,117	28,557
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,238	1,663	2,605
Total Recorded Investment	41,179	42,568	38,801
Real Estate [Member] | Owner Occupied CRE [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	2,892	4,661	4,111
Recorded Investment With Allowance	2,827	2,161	2,712
Related Allowance	445	232	297
Real Estate [Member] | Owner Occupied CRE [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	1,793	1,431	2,308
Total Recorded Investment	35,460	35,746	31,978
Real Estate [Member] | Residential [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,256	2,159	1,663
Total Recorded Investment	39,271	37,906	35,695
Real Estate [Member] | Residential [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	3,411	3,909	4,771
Recorded Investment With Allowance	4,404	3,740	2,461
Related Allowance	242	360	259
Real Estate [Member] | Residential [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	2,014	1,799	1,404
Total Recorded Investment	31,456	30,257	28,463
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	134	64	5
Total Recorded Investment	3,920	3,488	2,362
Consumer [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	814
Recorded Investment With Allowance	0	581	480
Related Allowance	73	1	1
Consumer [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	61	63	4
Total Recorded Investment	3,106	2,907	1,882
Consumer [Member] | Auto [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	5	4	3
Total Recorded Investment	2,828	2,589	1,648
Consumer [Member] | Auto [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	486
Recorded Investment With Allowance	0	464	398
Related Allowance	1	1	1
Consumer [Member] | Auto [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	4	3	2
Total Recorded Investment	2,342	2,125	1,250
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	129	60	2
Total Recorded Investment	1,092	899	714
Consumer [Member] | Non-Auto [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	328
Recorded Investment With Allowance	0	117	82
Related Allowance	72
Consumer [Member] | Non-Auto [Member] | Uncollateralized [Member]
Financing Receivable, Impaired [Line Items]
Related Allowance	57	60	2
Total Recorded Investment	$ 764	$ 782	$ 632

XML

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, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 201,587	$ 176,213	$ 157,056
Loans collectively evaluated for credit losses	7,027,823	6,972,578	6,419,159
Total Loans	7,229,410	7,148,791	6,576,215
C&I [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	41,454	22,765	25,484
Loans collectively evaluated for credit losses	1,150,062	1,142,046	929,202
Total Loans	1,191,516	1,164,811	954,686
Municipal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	559	733	907
Loans collectively evaluated for credit losses	210,454	214,117	220,472
Total Loans	211,013	214,850	221,379
Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	30,929	23,989	19,586
Loans collectively evaluated for credit losses	890,844	939,169	901,604
Total Loans	921,773	963,158	921,190
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	6,533	6,166	1,684
Loans collectively evaluated for credit losses	304,469	338,788	306,022
Total Loans	311,002	344,954	307,706
Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	31,655	37,139	31,464
Loans collectively evaluated for credit losses	822,066	790,830	705,653
Total Loans	853,721	827,969	737,117
Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	41,179	42,568	38,801
Loans collectively evaluated for credit losses	991,666	994,713	1,004,217
Total Loans	1,032,845	1,037,281	1,043,018
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	39,271	37,906	35,695
Loans collectively evaluated for credit losses	1,879,302	1,796,687	1,593,146
Total Loans	1,918,573	1,834,593	1,628,841
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,828	2,589	1,648
Loans collectively evaluated for credit losses	547,009	519,270	535,762
Total Loans	549,837	521,859	537,410
Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,092	899	714
Loans collectively evaluated for credit losses	150,156	153,527	147,137
Total Loans	151,248	154,426	147,851
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for credit losses	6,087	1,459	1,073
Loans collectively evaluated for credit losses	81,795	83,431	75,944
Total Loans	87,882	84,890	77,017
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	5,037,914	5,007,955	4,637,872
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	921,773	963,158	921,190
Real Estate [Member] | Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	311,002	344,954	307,706
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	853,721	827,969	737,117
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	1,032,845	1,037,281	1,043,018
Real Estate [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	1,918,573	1,834,593	1,628,841
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	701,085	676,285	685,261
Consumer [Member] | Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	549,837	521,859	537,410
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	$ 151,248	$ 154,426	$ 147,851

XML

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 Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 746	$ 2,531	$ 582
2023	2,152	2,036	2,858
2022	1,876	1,062	1,324
2021	1,015	518	620
2020	493	240	293
Prior	796	613	751
Revolving Loans Amortized Cost Basis	152	149	148
Total	7,230	7,149	6,576
Charge-Off [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		1
2022		1
2021	0
2020	0
Total	0	2
C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	244	733	157
2023	578	279	557
2022	228	75	137
2021	71	37	52
2020	34	16	21
Prior	37	25	31
Total	1,192	1,165	955
C&I [Member] | Charge-Off [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1
Total	0	1
Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	5	25	3
2023	20	83	82
2022	81	16	19
2021	16	10	15
2020	10	1	3
Prior	79	80	99
Total	211	215	221
Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	21	64	16
2023	56	15	52
2022	6	4	5
2021	3	1	2
2020	1	1	1
Prior	1		1
Total	88	85	77
Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	125	532	116
2023	451	317	599
2022	244	79	125
2021	69	20	56
2020	19	9	12
Prior	14	6	13
Total	922	963	921
Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	23	101	12
2023	60	111	144
2022	101	73	82
2021	71	29	31
2020	27	8	11
Prior	29	23	28
Total	311	345	308
Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	59	169	36
2023	135	238	246
2022	245	175	195
2021	178	113	97
2020	112	54	60
Prior	125	79	103
Total	854	828	737
Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	28	158	74
2023	159	312	322
2022	312	225	250
2021	215	114	127
2020	111	70	83
Prior	208	158	187
Total	1,033	1,037	1,043
Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	132	482	96
2023	458	421	485
2022	429	318	360
2021	307	163	186
2020	154	70	80
Prior	293	239	281
Revolving Loans Amortized Cost Basis	145	142	141
Total	1,918	1,835	1,629
Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	91	195	51
2023	175	213	297
2022	189	75	116
2021	65	27	47
2020	22	10	20
Prior	8	2	6
Total	550	522	537
Auto [Member] | Charge-Off [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1
Total	0	1
Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	18		21
2023	60	72	74
2022	41	47	35
2021	20	22	7
2020	3	4	2
Prior	2	1	2
Revolving Loans Amortized Cost Basis	7	7	7
Total	151	154	148
Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	725	2,488	573
2023	2,093	2,007	2,818
2022	1,856	1,041	1,306
2021	984	499	606
2020	475	214	266
Prior	747	578	706
Revolving Loans Amortized Cost Basis	148	145	144
Total	7,028	6,972	6,419
Pass [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	236	720	155
2023	551	276	548
2022	226	73	132
2021	70	36	48
2020	32	14	19
Prior	36	23	28
Total	1,151	1,142	930
Pass [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	5	25	3
2023	20	83	82
2022	81	15	19
2021	15	10	15
2020	10	1	2
Prior	79	80	99
Total	210	214	220
Pass [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	18	63	16
2023	54	15	51
2022	6	4	5
2021	3	1	2
2020	1	1	1
Prior			1
Total	82	84	76
Pass [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	117	515	111
2023	438	311	586
2022	240	78	124
2021	63	20	56
2020	19	9	12
Prior	14	6	13
Total	891	939	902
Pass [Member] | Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	23	101	12
2023	58	111	142
2022	101	73	82
2021	71	24	31
2020	23	8	11
Prior	29	22	28
Total	305	339	306
Pass [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	59	167	36
2023	133	232	244
2022	244	172	192
2021	174	106	96
2020	104	41	47
Prior	108	73	91
Total	822	791	706
Pass [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	28	154	73
2023	155	305	316
2022	305	217	247
2021	202	114	124
2020	110	62	74
Prior	190	142	170
Total	990	994	1,004
Pass [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	130	477	95
2023	450	415	479
2022	424	313	355
2021	302	158	181
2020	151	67	78
Prior	281	229	268
Revolving Loans Amortized Cost Basis	141	138	137
Total	1,879	1,797	1,593
Pass [Member] | Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	91	195	51
2023	175	212	296
2022	188	74	116
2021	64	26	46
2020	22	10	20
Prior	8	2	6
Total	548	519	535
Pass [Member] | Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	18		21
2023	59	71	74
2022	41	47	34
2021	20	22	7
2020	3	4	2
Prior	2	1	2
Revolving Loans Amortized Cost Basis	7	7	7
Total	150	153	147
Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	13	11	4
2023	28	11	17
2022	6	7	6
2021	10	2	6
2020	2	2	19
Prior	3	6	11
Revolving Loans Amortized Cost Basis	1	1	1
Total	63	40	64
Special Mention [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	6	1	1
2023	17	1	3
2022	1	0	1
2021			2
2020	0	1	1
Total	24	3	8
Special Mention [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020			1
Total			1
Special Mention [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1		1
Total	1		1
Special Mention [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	7	8	3
2023	6	2	9
2022	3
Total	16	10	12
Special Mention [Member] | Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1
Total	1
Special Mention [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023		5
2022	0	1	1
2021	1
2020	1		11
Prior	1	2	6
Total	3	8	18
Special Mention [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	1
2023	2	1	3
2022	1	4	1
2021	8	0	2
2020		1	6
Prior		1	1
Total	11	8	13
Special Mention [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024		1
2023	1	2	1
2022	1	2	3
2021	1	2	2
2020	1
Prior	2	3	4
Revolving Loans Amortized Cost Basis	1	1	1
Total	7	11	11
Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	8	32	5
2023	31	18	23
2022	14	14	12
2021	21	17	8
2020	16	24	8
Prior	46	29	34
Revolving Loans Amortized Cost Basis	3	3	3
Total	139	137	93
Substandard [Member] | C&I [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	2	12	1
2023	10	2	6
2022	1	2	4
2021	1	1	2
2020	2	1	1
Prior	1	2	3
Total	17	20	17
Substandard [Member] | Municipal [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1
2021	1
Total	1	1
Substandard [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	3	1
2023	1
Prior	1
Total	5	1
Substandard [Member] | Construction & Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1	9	2
2023	7	4	4
2022	1	1	1
2021	6
Total	15	14	7
Substandard [Member] | Farm [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0
2023	1		2
2022	0
2021	0	5
2020	4
Prior	0	1
Total	5	6	2
Substandard [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	2
2023	2	1	2
2022	1	2	2
2021	3	7	1
2020	7	13	2
Prior	16	4	6
Total	29	29	13
Substandard [Member] | Owner Occupied CRE [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	3	1
2023	2	6	3
2022	6	4	2
2021	5	0	1
2020	1	7	3
Prior	18	15	16
Total	32	35	26
Substandard [Member] | Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024	2	4	1
2023	7	4	5
2022	4	3	2
2021	4	3	3
2020	2	3	2
Prior	10	7	9
Revolving Loans Amortized Cost Basis	3	3	3
Total	32	27	25
Substandard [Member] | Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023		1	1
2022	1	1
2021	1	1	1
Total	2	3	2
Substandard [Member] | Non-Auto [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1	1
2022			1
Total	$ 1	$ 1	$ 1

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 7,230,000	$ 7,149,000	$ 6,576,000
Total Loans		7,229,410	7,148,791	6,576,215
Total 90 Days Past Due Still Accruing		33	1,004	22
C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,192,000	1,165,000	955,000
Total Loans		1,191,516	1,164,811	954,686
Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		211,000	215,000	221,000
Total Loans		211,013	214,850	221,379
Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		922,000	963,000	921,000
Total Loans		921,773	963,158	921,190
Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		311,000	345,000	308,000
Total Loans		311,002	344,954	307,706
Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		854,000	828,000	737,000
Total Loans		853,721	827,969	737,117
Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,033,000	1,037,000	1,043,000
Total Loans		1,032,845	1,037,281	1,043,018
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,918,000	1,835,000	1,629,000
Total Loans		1,918,573	1,834,593	1,628,841
Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		550,000	522,000	537,000
Total Loans		549,837	521,859	537,410
Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		151,000	154,000	148,000
Total Loans		151,248	154,426	147,851
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,402,529	1,379,661	1,176,065
Total 90 Days Past Due Still Accruing		33	141	14
Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,191,516	1,164,811	954,686
Total 90 Days Past Due Still Accruing		33	141	14
Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		211,013	214,850	221,379
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		87,882	84,890	77,017
Total 90 Days Past Due Still Accruing		0
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		5,037,914	5,007,955	4,637,872
Total 90 Days Past Due Still Accruing		0	863	0
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		921,773	963,158	921,190
Total 90 Days Past Due Still Accruing			863
Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		311,002	344,954	307,706
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		853,721	827,969	737,117
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,032,845	1,037,281	1,043,018
Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		1,918,573	1,834,593	1,628,841
Total 90 Days Past Due Still Accruing		0		0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		701,085	676,285	685,261
Total 90 Days Past Due Still Accruing				8
Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		549,837	521,859	537,410
Total 90 Days Past Due Still Accruing				8
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		151,248	154,426	147,851
15-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	37,342	40,151	27,671
15-59 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	6,487	8,891	4,161
15-59 Days Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	6,462	8,789	3,952
15-59 Days Past Due [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	25	102	209
15-59 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	624	850	816
15-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	29,045	28,587	21,875
15-59 Days Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	9,277	8,887	7,058
15-59 Days Past Due [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	855	1,024	264
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	[1]	1,840	3,565	3,183
15-59 Days Past Due [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	3,269	2,818	3,886
15-59 Days Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	13,804	12,293	7,484
15-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	1,186	1,823	819
15-59 Days Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	967	1,482	683
15-59 Days Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	219	341	136
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,081	5,550	1,434
60-89 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		250	1,624	292
60-89 Days Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		250	1,624	292
60-89 Days Past Due [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		0	0
60-89 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		0	246	25
60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		698	3,378	1,076
60-89 Days Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		258	2,115	332
60-89 Days Past Due [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7	195	0
60-89 Days Past Due [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		19	0
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	240	0
60-89 Days Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		414	828	744
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		133	302	41
60-89 Days Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		120	251	41
60-89 Days Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		13	51	0
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7,091	8,223	3,692
Greater than 90 Days [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,594	1,700	1,825
Greater than 90 Days [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,594	1,700	1,825
Greater than 90 Days [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		71	4	24
Greater than 90 Days [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		5,426	6,495	1,834
Greater than 90 Days [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,347	1,856
Greater than 90 Days [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		95		372
Greater than 90 Days [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,374		695
Greater than 90 Days [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		70	1,823
Greater than 90 Days [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,540	2,816	767
Greater than 90 Days [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		0	24	9
Greater than 90 Days [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		0	24	9
Greater than 90 Days [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		0
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		45,514	53,924	32,797
Total Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		8,331	12,215	6,278
Total Past Due [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		8,306	12,113	6,069
Total Past Due [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		25	102	209
Total Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		695	1,100	865
Total Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		35,169	38,460	24,785
Total Past Due [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		10,882	12,858	7,390
Total Past Due [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		957	1,219	636
Total Past Due [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,233	3,565	3,878
Total Past Due [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,339	4,881	3,886
Total Past Due [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		16,758	15,937	8,995
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,319	2,149	869
Total Past Due [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,087	1,757	733
Total Past Due [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		232	392	136
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7,183,896	7,094,867	6,543,418
Current [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,394,198	1,367,446	1,169,787
Current [Member] | Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,183,210	1,152,698	948,617
Current [Member] | Commercial [Member] | Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		210,988	214,748	221,170
Current [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		87,187	83,790	76,152
Current [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		5,002,745	4,969,495	4,613,087
Current [Member] | Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		910,891	950,300	913,800
Current [Member] | Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		310,045	343,735	307,070
Current [Member] | Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		850,488	824,404	733,239
Current [Member] | Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,029,506	1,032,400	1,039,132
Current [Member] | Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,901,815	1,818,656	1,619,846
Current [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		699,766	674,136	684,392
Current [Member] | Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		548,750	520,102	536,677
Current [Member] | Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 151,016	$ 154,034	$ 147,715

[1] The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

XML

Loans Held for Sale - Additional Information (Detail) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Loans Receivables Held For Sale Net [Abstract]
Loans held for sale	$ 16,109,000	$ 14,253,000	$ 11,996,000
Loans held-for-sale at the lower of cost or fair value	$ 1,029,000	$ 3,176,000	$ 230,000

XML

Derivative Financial Instruments - Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
IRLCs [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	$ 53,206	$ 28,956	$ 58,706
Asset Derivative Fair Value	803	427	827
Liability Derivative Fair Value	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	70,000	35,000	69,500
Asset Derivative Fair Value	0	0	0
Liability Derivative Fair Value	$ 91	$ 288	$ 334

XML

Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Debt Disclosure [Abstract]
Securities sold under agreements with customers to repurchase	$ 307,297	$ 381,928	$ 608,299
Federal funds purchased	5,750	1,100	3,575
Other borrowings	21,053	21,053	21,053
Total	26,803	22,153	24,628
Total	$ 334,100	$ 404,081	$ 632,927

XML

Borrowings - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 USD ($)
Line of Credit Facility [Line Items]
Revolving line of credit, permitted	$ 25,000,000
Line of credit	0
Other borrowings	$ 21,053,000
Line of credit, maturity date	Jun. 30, 2023

XML

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Taxes [Line Items]
Federal statutory tax rate	21.00%
Income tax expense	$ 11,480,000	$ 11,688,000
Effective tax rates on pre-tax income	17.70%	18.19%
Initial capital contribution commitment	$ 5,500,000
Initial contribution included in other assets	978,000	$ 131,000	$ 615,000
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	$ 25,411,000	26,553,000	25,738,000
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

XML

Stock Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Apr. 27, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate	20.00%
Duration of options granted, years	10 years
Stock options outstanding, exercise price range, lower	$ 16.95
Stock options outstanding, exercise price range, upper	$ 48.91
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	$ 4,723,000
Weighted-average period of unrecognized compensation cost recognition, years	1 year 5 months 8 days
Total fair value of shares vested	$ 46,000	$ 15,000
Stock compensation expense	485,000	444,000
Dividends Payable	25,754,000	24,274,000	$ 25,712,000
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	1,617,290			2,500,000
2021 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate	20.00%
Other Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends Payable	$ 111,000	82,000	$ 124,000
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	$ 650,000	98,000
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 175,000	150,000
Restricted Stock [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense		358,000
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	20.00%
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	50.00%
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	200.00%
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	0.00%
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	$ 2,514,000	$ 2,576,000
Weighted-average period of unrecognized compensation cost recognition, years	1 year 1 month 20 days	1 year 2 months 1 day
Restricted Stock Units [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 469,000

XML

Stock Based Compensation - Schedule of Changes in Stock Units (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	25,190	24,813
Grants	0	0
Vesting	0	(2,872)
Forfeited/expired	0	(1,105)
Balance at end of period	25,190	20,836
Balance at beginning of period	$ 27.79	$ 36.21
Weighted Average Grant Date Fair Value, Grants	0	0
Weighted Average Grant Date Fair Value, Vesting	0	28.25
Weighted Average Grant Date Fair Value, Forfeited/expired	0	29.7
Balance at end of period	$ 27.79	$ 37.53
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	53,817	39,657
Grants	0	0
Vesting	0	0
Forfeited/expired	(599)	(2,888)
Balance at end of period	53,218	36,769
Balance at beginning of period	$ 37.04	$ 47.83
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	33.89	47.87
Balance at end of period	$ 37.07	$ 47.83
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	75,227	47,082
Grants	0	0
Vesting	(20,532)	0
Forfeited/expired	(686)	(3,456)
Balance at end of period	54,009	43,626
Balance at beginning of period	$ 40.24	$ 48
Weighted Average Grant Date Fair Value, Grants	0	0
Weighted Average Grant Date Fair Value, Vesting	48.91	0
Weighted Average Grant Date Fair Value, Forfeited/expired	35.61	48.04
Balance at end of period	$ 37	$ 48

XML

Stock Based Compensation - Summary of Vested and Unvested Restricted Stock Outstanding (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Balance at beginning of period	25,190	24,813
Grants	0	0
Vesting	0	(2,872)
Forfeited/expired	0	(1,105)
Balance at end of period	25,190	20,836
Balance at beginning of period	$ 27.79	$ 36.21
Grants	0	0
Vesting	0	28.25
Forfeited/expired	0	29.7
Balance at end of period	$ 27.79	$ 37.53

XML

Stock Based Compensation - Schedule of Analysis of Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding, beginning of period, Shares | shares	1,552,249
Shares, Granted | shares	0
Exercised, Shares | shares	(82,614)
Cancelled, Shares | shares	(21,692)
Outstanding, end of period, Shares | shares	1,447,943
Exercisable at end ofperiod, Shares | shares	813,657
Outstanding, beginning of period, Weighted-Average Ex. Price | $ / shares	$ 30.45
Granted, Weighted-Average Ex. Price | $ / shares	0
Exercised, Weighted-Average Ex. Price | $ / shares	20.77
Cancelled, Weighted-Average Ex. Price | $ / shares	36.49
Outstanding, end of period, Weighted-Average Ex. Price | $ / shares	30.91
Exercisable at end of period, Weighted-Average Ex. Price | $ / shares	$ 25.85

XML

Fair Value Disclosures - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) Loans	Mar. 31, 2023 USD ($) Loans	Dec. 31, 2023 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	937,000	175,000	$ 483,000
Real state owned	454,000	175,000
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

XML

Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Available-for-sale investment securities:
Available-for-sale securities	$ 4,658,526,000	$ 4,732,762,000	$ 5,298,557,000
Loans held for sale	16,109,000	14,253,000	11,996,000
U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	432,168,000	482,234,000	488,242,000
Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale securities	1,454,035,000	1,497,157,000	1,773,612,000
Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	2,299,277,000	2,364,092,000	2,583,170,000
Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	368,906,000	284,324,000	349,936,000
IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	803,000	427,000	827,000
Forward mortgage-backed securities trades asset (liability)	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	0	0	0
Forward mortgage-backed securities trades asset (liability)	91,000	288,000	334,000
Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades asset (liability)	(91,000)	(288,000)	(334,000)
Fair Value, Measurements, Recurring [Member]
Available-for-sale investment securities:
Available-for-sale securities	4,658,526,000	4,732,762,000	5,298,557,000
Loans held for sale	15,080,000	11,077,000	11,766,000
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	432,168,000	482,234,000	488,242,000
Fair Value, Measurements, Recurring [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale securities	1,454,035,000	1,497,157,000	1,773,612,000
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	2,299,277,000	2,364,092,000	2,583,170,000
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	368,906,000	284,324,000	349,936,000
Fair Value, Measurements, Recurring [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	803,000	427,000	827,000
Fair Value, Measurements, Recurring [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades asset (liability)	(91,000)	(288,000)	(334,000)
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale securities	99,717,000	100,471,000	99,620,000
Fair Value, Measurements, Recurring [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Available-for-sale securities	4,423,000	4,484,000	3,977,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale securities	436,591,000	486,718,000	492,219,000
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:
Available-for-sale securities	432,168,000	482,234,000	488,242,000
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	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
Forward mortgage-backed securities trades asset (liability)	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Available-for-sale securities	4,423,000	4,484,000	3,977,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale securities	4,221,935,000	4,246,044,000	4,806,338,000
Loans held for sale	15,080,000	11,077,000	11,766,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale securities	1,454,035,000	1,497,157,000	1,773,612,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	2,299,277,000	2,364,092,000	2,583,170,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	368,906,000	284,324,000	349,936,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	0	0	(0)
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades asset (liability)	(91,000)	(288,000)	(334,000)
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale securities	99,717,000	100,471,000	99,620,000
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale securities	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:
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	803,000	427,000	827,000
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
Forward mortgage-backed securities trades asset (liability)	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale securities	0	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member] | Collateralized Securities, Other [Member]
Available-for-sale investment securities:
Available-for-sale securities	$ 0	$ 0	$ 0

XML

Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Fair Value Measurements Loans Held For Sale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 14,701	$ 10,757	$ 11,416
Net unrealized gains on loans held-for-sale	379	320	350
Loans held-for-sale at fair value	$ 15,080	$ 11,077	$ 11,766

XML

Fair Value Disclosures - Schedule of Gain Loss on Sale of Mortgage Loans (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Schedule Of Gain Loss On Sale Of Mortgage Loans [Abstract]
Realized gain on sale and fees on mortgage loans*	[1]	$ 2,580	$ 2,859
Change in fair value on loans held-for-sale and IRLCs		351	534
Change in forward mortgage-backed securities trades		197	(419)
Total gain on sale of mortgage loans		$ 3,128	$ 2,974

[1] This includes gains on loans held-for-sale carried under the fair value method and lower of cost or market.

XML

Fair Value Disclosures - Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 222,464,000	$ 224,875,000	$ 281,354,000
FEDERAL FUNDS SOLD	12,300,000	0	0
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	365,397,000	221,336,000	255,237,000
Available-for-sale securities	4,658,526,000	5,298,557,000	4,732,762,000
Loans held-for-investment, net allowance for credit losses	7,139,848,000	6,495,397,000	7,060,057,000
Loans held for sale	16,109,000	11,996,000	14,253,000
Borrowings	26,803,000	24,628,000	22,153,000
IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
IRLCs	803,000	827,000	427,000
Forward mortgage-backed securities trades asset (liability)	0	0	0
Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
IRLCs	0	0	0
Forward mortgage-backed securities trades asset (liability)	91,000	334,000	288,000
Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward mortgage-backed securities trades asset (liability)	(91,000)	(334,000)	(288,000)
Carrying Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	222,464,000	224,875,000	281,354,000
FEDERAL FUNDS SOLD	12,300,000	0	0
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	365,397,000	221,336,000	255,237,000
Deposits with no stated maturities	10,351,267,000	10,196,920,000	10,199,320,000
Carrying Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	16,109,000	11,996,000	14,253,000
Accrued interest receivable	56,278,000	50,658,000	58,544,000
Deposits with stated maturities	938,541,000	739,498,000	938,980,000
Repurchase Agreements	307,297,000	608,299,000	381,928,000
Borrowings	26,803,000	24,628,000	22,153,000
Accrued interest payable	8,362,000	3,617,000	10,215,000
Carrying Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
IRLCs	803,000	827,000	427,000
Carrying Value [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward mortgage-backed securities trades asset (liability)	(91,000)	(334,000)	(288,000)
Carrying Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	4,658,526,000	5,298,557,000	4,732,762,000
Carrying Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment, net allowance for credit losses	7,139,847,000	6,495,397,000	7,060,057,000
Estimated Fair Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	222,464,000	224,875,000	281,354,000
FEDERAL FUNDS SOLD	12,300,000	0	0
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	365,397,000	221,336,000	255,237,000
Deposits with no stated maturities	10,351,267,000	10,196,920,000	10,199,320,000
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	16,109,000	12,018,000	14,378,000
Accrued interest receivable	56,278,000	50,658,000	58,544,000
Deposits with stated maturities	938,459,000	736,434,000	938,534,000
Repurchase Agreements	307,297,000	608,299,000	381,928,000
Borrowings	26,803,000	24,628,000	22,153,000
Accrued interest payable	8,362,000	3,617,000	10,215,000
Estimated Fair Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
IRLCs	803,000	827,000	427,000
Estimated Fair Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	4,658,526,000	5,298,557,000	4,732,762,000
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment, net allowance for credit losses	$ 7,141,043,000	$ 6,464,027,000	$ 7,036,722,000