10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________________________________

FORM 10-Q

_______________________________________________

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

FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2023

OR

£ 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: 001-38280

_______________________________________________

Stellar Bancorp, Inc.

(Exact name of registrant as specified in its charter)

_______________________________________________

Texas	20-8339782
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

9 Greenway Plaza, Suite 110

Houston, Texas 77046

(Address of principal executive offices, including zip code)

(713) 210-7600

(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, par value, $0.01 per share	STEL	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

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 S  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 S  No £

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

Large accelerated filer	£	Accelerated filer	S
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 Rule 12b-2 of the Exchange Act). Yes £ No S

As of November 2, 2023, the registrant had 53,262,213 shares common stock, $0.01 par value per share, outstanding.

Table of Contents

STELLAR BANCORP, INC.

INDEX TO FORM 10-Q

September 30, 2023

PART I—FINANCIAL INFORMATION
Item 1.	Interim Consolidated Financial Statements	3
	Consolidated Balance Sheets (unaudited)	3
	Consolidated Statements of Income (unaudited)	4
	Consolidated Statements of Comprehensive Income (unaudited)	5
	Consolidated Statements of Changes in Shareholders' Equity (unaudited)	6
	Consolidated Statements of Cash Flows (unaudited)	7
	Condensed Notes to Interim Consolidated Financial Statements (unaudited)	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	58
Item 4.	Controls and Procedures	59
PART II—OTHER INFORMATION
Item 1.	Legal Proceedings	59
Item 1A.	Risk Factors	59
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	60
Item 3.	Defaults upon Senior Securities	60
Item 4.	Mine Safety Disclosures	60
Item 5.	Other Information	60
Item 6.	Exhibits	61
Signatures		62

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PART I—FINANCIAL INFORMATION

ITEM 1. INTERIM CONSOLIDATED FINANCIAL STATEMENTS

STELLAR BANCORP, INC.

CONSOLIDATED BALANCE SHEETS

(Unaudited)

	September 30, 2023		December 31, 2022
	(In thousands, except shares and par value)
ASSETS
Cash and due from banks	$	94,970	$	67,063
Interest-bearing deposits at other financial institutions	207,302		304,642
Total cash and cash equivalents	302,272		371,705
Available for sale securities, at fair value	1,414,952		1,807,586
Loans held for investment	8,004,528		7,754,751
Less: allowance for credit losses on loans	(93,575)		(93,180)
Loans, net	7,910,953		7,661,571
Accrued interest receivable	43,536		44,743
Premises and equipment, net	119,332		126,803
Federal Home Loan Bank stock	29,022		15,058
Bank-owned life insurance	104,699		103,094
Goodwill	497,318		497,260
Core deposit intangibles, net	122,944		143,525
Other assets	120,432		129,092
TOTAL ASSETS	$	10,665,460	$	10,900,437
LIABILITIES AND SHAREHOLDERS’ EQUITY
LIABILITIES:
Deposits:
Noninterest-bearing	$	3,656,288	$	4,230,169
Interest-bearing
Demand	1,397,492		1,591,828
Money market and savings	2,128,950		2,575,923
Certificates and other time	1,503,891		869,712
Total interest-bearing deposits	5,030,333		5,037,463
Total deposits	8,686,621		9,267,632
Accrued interest payable	7,612		2,098
Borrowed funds	323,981		63,925
Subordinated debt	109,665		109,367
Other liabilities	76,735		74,239
Total liabilities	9,204,614		9,517,261
COMMITMENTS AND CONTINGENCIES (See Note 14)
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.01 par value; 10,000,000 shares authorized; no shares issued or outstanding at September 30, 2023 and December 31, 2022	—		—
Common stock, $0.01 par value; 140,000,000 shares authorized; 53,321,541 shares issued and outstanding at September 30, 2023 and 52,954,985 shares issued and outstanding at December 31, 2022	533		530
Capital surplus	1,231,686		1,222,761
Retained earnings	385,600		303,146
Accumulated other comprehensive loss	(156,973)		(143,261)
Total shareholders’ equity	1,460,846		1,383,176
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	10,665,460	$	10,900,437

See condensed notes to interim consolidated financial statements.

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STELLAR BANCORP, INC.

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Dollars in thousands, except per share data)
INTEREST INCOME:
Loans, including fees	$	138,948	$	58,025	$	398,608	$	164,230
Securities:
Taxable	9,493		6,655		28,872		17,294
Tax-exempt	437		2,594		2,135		7,676
Deposits in other financial institutions	2,391		608		9,027		1,825
Total interest income	151,269		67,882		438,642		191,025
INTEREST EXPENSE:
Demand, money market and savings deposits	23,557		3,527		62,302		6,733
Certificates and other time deposits	13,282		1,664		26,211		5,742
Borrowed funds	5,801		499		13,653		799
Subordinated debt	1,908		1,502		5,647		4,407
Total interest expense	44,548		7,192		107,813		17,681
NET INTEREST INCOME	106,721		60,690		330,829		173,344
Provision for credit losses	2,315		1,962		7,896		5,919
Net interest income after provision for credit losses	104,406		58,728		322,933		167,425
NONINTEREST INCOME:
Nonsufficient funds and overdraft charges	291		145		1,115		387
Service charges on deposit accounts	1,329		527		3,429		1,614
Gain on sale of assets	—		42		192		25
Bank-owned life insurance income	551		135		1,605		610
Debit card and ATM income	935		869		4,454		2,568
Other	1,589		1,277		6,881		4,513
Total noninterest income	4,695		2,995		17,676		9,717
NONINTEREST EXPENSE:
Salaries and employee benefits	39,495		22,013		116,570		66,605
Net occupancy and equipment	4,455		2,129		12,360		6,554
Depreciation	1,952		1,003		5,629		3,048
Data processing and software amortization	4,798		2,541		14,526		7,561
Professional fees	997		485		4,088		1,285
Regulatory assessments and FDIC insurance	1,814		1,134		5,863		3,651
Amortization of intangibles	6,876		750		20,636		2,252
Communications	663		359		2,053		1,063
Advertising	877		385		2,623		1,330
Acquisition and merger-related expenses	3,421		10,551		12,483		12,669
Other	5,400		2,681		15,722		10,434
Total noninterest expense	70,748		44,031		212,553		116,452
INCOME BEFORE INCOME TAXES	38,353		17,692		128,056		60,690
Provision for income taxes	7,445		3,406		24,825		11,310
NET INCOME	$	30,908	$	14,286	$	103,231	$	49,380
EARNINGS PER SHARE:
Basic	$	0.58	$	0.51	$	1.94	$	1.72
Diluted	$	0.58	$	0.50	$	1.94	$	1.71
DIVIDENDS PER SHARE	$	0.13	$	0.10	$	0.39	$	0.30

See condensed notes to interim consolidated financial statements.

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STELLAR BANCORP, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(In thousands)
Net income	$	30,908	$	14,286	$	103,231	$	49,380
Other comprehensive loss:
Unrealized loss on securities:
Change in unrealized holding loss on available for sale securities during the period	(31,638)		(60,618)		(17,390)		(229,887)
Reclassification of gain realized on securities	—		(42)		(234)		(25)
Total other comprehensive loss	(31,638)		(60,660)		(17,624)		(229,912)
Deferred tax benefit related to other comprehensive loss	6,669		12,739		3,912		48,282
Other comprehensive loss, net of tax	(24,969)		(47,921)		(13,712)		(181,630)
Comprehensive income (loss)	$	5,939	$	(33,635)	$	89,519	$	(132,250)

See condensed notes to interim consolidated financial statements.

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STELLAR BANCORP, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

(Unaudited)

	Common Stock			Capital Surplus		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total Shareholders’ Equity
	Shares	Amount
	(Dollars in thousands, except per share data)
BALANCE AT JUNE 30, 2022	28,586,426	$	286	$	524,033	$	296,477	$	(115,467)	$	705,329
Net income	—	—		—		14,286		—		14,286
Other comprehensive loss	—	—		—		—		(47,921)		(47,921)
Cash dividends declared, $0.10 per share	—	—		—		(2,788)		—		(2,788)
Common stock issued in connection     with the exercise of stock options and     restricted stock awards	31,823	—		343		—		—		343
Repurchase of common stock	(481,638)	(5)		(13,911)						(13,916)
Stock-based compensation expense	—	—		969		—		—		969
BALANCE AT SEPTEMBER 30, 2022	28,136,611	$	281	$	511,434	$	307,975	$	(163,388)	$	656,302
BALANCE AT JUNE 30, 2023	53,302,734	$	533	$	1,228,532	$	361,619	$	(132,004)	$	1,458,680
Net income	—	—		—		30,908		—		30,908
Other comprehensive loss	—	—		—		—		(24,969)		(24,969)
Cash dividends declared, $0.13 per share	—	—		—		(6,927)		—		(6,927)
Common stock issued in connection with the exercise of stock options and restricted stock awards	18,807	—		342		—		—		342
Stock-based compensation expense	—	—		2,812		—		—		2,812
BALANCE AT SEPTEMBER 30, 2023	53,321,541	$	533	$	1,231,686	$	385,600	$	(156,973)	$	1,460,846
BALANCE AT DECEMBER 31, 2021	28,845,903	$	289	$	530,845	$	267,092	$	18,242	$	816,468
Net income	—	—		—		49,380		—		49,380
Other comprehensive loss	—	—		—		—		(181,630)		(181,630)
Cash dividends declared $0.30 per share	—	—		—		(8,497)		—		(8,497)
Common stock issued in connection with the exercise of stock options and restricted stock awards	122,619	1		1,327		—		—		1,328
Repurchase of common stock	(831,911)	(9)		(23,597)		—		—		(23,606)
Stock-based compensation expense	—	—		2,859		—		—		2,859
BALANCE AT SEPTEMBER 30, 2022	28,136,611	$	281	$	511,434	$	307,975	$	(163,388)	$	656,302
BALANCE AT DECEMBER 31, 2022	52,954,985	$	530	$	1,222,761	$	303,146	$	(143,261)	$	1,383,176
Net income	—	—		—		103,231		—		103,231
Other comprehensive loss	—	—		—		—		(13,712)		(13,712)
Cash dividends declared $0.39 per share	—	—		—		(20,777)		—		(20,777)
Common stock issued in connection with the exercise of stock options and restricted stock awards	366,556	3		690		—		—		693
Stock-based compensation expense	—	—		8,235		—		—		8,235
BALANCE AT SEPTEMBER 30, 2023	53,321,541	$	533	$	1,231,686	$	385,600	$	(156,973)	$	1,460,846

See condensed notes to interim consolidated financial statements.

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STELLAR BANCORP, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
	(In thousands)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	103,231	$	49,380
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and core deposit intangibles amortization	26,265		5,300
Provision for credit losses	7,896		5,919
Deferred income tax benefit	11,617		(954)
Net amortization of premium on investments	5,098		7,903
Excess tax benefit from stock-based compensation	(70)		(312)
Bank-owned life insurance income	(1,605)		(610)
Net accretion of discount on loans	(35,065)		(165)
Net amortization of discount on subordinated debt	88		87
Net accretion of discount on certificates of deposit	(21)		(45)
Net gain on sale of assets	(192)		(25)
Federal Home Loan Bank stock dividends	(799)		(64)
Stock-based compensation expense	8,235		2,859
Net change in operating leases	3,055		2,178
Increase in accrued interest receivable and other assets	(165)		(1,415)
Increase in accrued interest payable and other liabilities	9,319		4,082
Net cash provided by operating activities	136,887		74,118
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities and principal paydowns of available for sale securities	685,707		2,320,157
Proceeds from sales and calls of available for sale securities	320,691		12,056
Purchase of available for sale securities	(633,287)		(2,414,630)
Net change in total loans	(223,256)		(371,904)
Purchase of bank premises and equipment	(5,621)		(668)
Proceeds from sale of bank premises, equipment and other real estate	3,685		—
Net purchase of Federal Home Loan Bank stock	(13,165)		(7,421)
Net cash provided by (used in) investing activities	134,754		(462,410)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (decrease) increase in noninterest-bearing deposits	(573,881)		222,754
Net decrease in interest-bearing deposits	(7,109)		(609,629)
Net change in short-term other borrowed funds	260,000		167,000
Dividends paid to common shareholders	(20,777)		(8,497)
Proceeds from the issuance of common stock and stock option exercises	693		1,328
Repurchase of common stock	—		(23,606)
Net cash used in financing activities	(341,074)		(250,650)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(69,433)		(638,942)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	371,705		757,509
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	302,272	$	118,567
SUPPLEMENTAL CASH FLOW INFORMATION:
Income taxes paid	$	7,500	$	10,550
Interest paid	102,299		16,761
Cash paid for operating lease liabilities	3,372		2,559
SUPPLEMENTAL NONCASH DISCLOSURE:
Branch assets transferred to assets held for sale	$	3,819	$	2,137

See condensed notes to interim consolidated financial statements.

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STELLAR BANCORP, INC.

CONDENSED NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS

September 30, 2023

(Unaudited)

1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES

Nature of Operations-Stellar Bancorp, Inc. (“Stellar”) through its wholly-owned subsidiary, Stellar Bank, (the “Bank”), and together with Stellar, collectively referred to herein as “we,” “us,” “our” and the “Company”), provides a diversified range of commercial banking services primarily to small- to medium-sized businesses. Stellar derives substantially all of its revenues and income from the operation of the Bank.

    We refer to the Houston-The Woodlands-Sugar Land metropolitan statistical area (“MSA”), as the Houston region (“Houston

region”) and the Beaumont-Port Arthur MSA, as the Beaumont region (“Beaumont region”). The Company is focused on delivering a

wide variety of relationship-driven commercial banking products and community-oriented services tailored to meet the needs of small-to medium-sized businesses, professionals and individuals through its 55 banking centers with 38 banking centers in the Houston

region, 16 banking centers in the Beaumont region and one banking center in Dallas, Texas, which we collectively refer to as our

markets.

Basis of Presentation-The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and in accordance with guidance provided by the Securities and Exchange Commission (“SEC”). Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis, and all such adjustments are of a normal recurring nature. Transactions between Stellar and the Bank have been eliminated. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

Merger of Equals-The merger of equals (the “Merger”) between Allegiance Bancshares, Inc. (“Allegiance”) and CBTX, Inc. (“CBTX”), was effective on October 1, 2022, with CBTX as the surviving corporation that was renamed Stellar Bancorp, Inc. At the effective time of the Merger, each outstanding share of Allegiance common stock, par value of $1.00 per share, was converted into the right to receive 1.4184 shares of common stock of the Company. Immediately following the Merger, CommunityBank of Texas, N.A. (“CommunityBank”), a national banking association and a wholly-owned subsidiary of CBTX, merged with and into Allegiance Bank, a wholly owned subsidiary of Allegiance, with Allegiance Bank as the surviving bank. Allegiance Bank changed its name to Stellar Bank on February 18, 2023 in connection with the operational conversion.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Allegiance was the accounting acquirer and CBTX was the legal acquirer and the accounting acquiree. Accordingly, the historical financial statements of Allegiance became the historical financial statements of the combined company for all periods prior to October 1, 2022 (the “Merger Date”). In addition, the assets and liabilities of CBTX have been recorded at their estimated fair values and added to those of Allegiance as of October 1, 2022. The determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events that are subjective.

The Company’s results of operations for the three and nine months ended September 30, 2022 reflect Allegiance's historical results and do not include the historical results of CBTX. The Merger had a significant impact on all aspects of the Company’s financial statements, and financial results for periods after the Merger are not comparable to financial results for periods prior to the Merger. The number of shares issued and outstanding, earnings per share, capital surplus, dividends paid and all references to share quantities of the Company have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of

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Allegiance common stock in the Merger. See Note 2 – Acquisitions in the accompanying notes to the consolidated financial statements for the impact of the Merger.

Significant Accounting and Reporting Policies

The Company’s significant accounting and reporting policies can be found in Note 1 of the Company’s annual financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Adoption of New Accounting Standards

ASU 2022-02, "Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." became effective for the Company for the first quarter of 2023 and did not have a significant impact on the Company’s financial statements. ASU 2022-02 eliminates the troubled debt restructuring ("TDR") accounting model for creditors that have already adopted Topic 326, which is commonly referred to as the current expected credit loss model. In lieu of the TDR accounting model, the Company applies the general loan modification guidance in Subtopic 310-20 to all loan modifications, including modifications made for borrowers experiencing financial difficulty on a prospective basis. Under the general loan modification guidance, a modification is treated as a new loan only if the following two conditions are met: (1) the terms of the new loan are at least as favorable to the lender as the terms for comparable loans to other customers with similar collection risks; and (2) modifications to the terms of the original loan are more than minor. If either condition is not met, the modification is accounted for as the continuation of the old loan with any effect of the modification treated as a prospective adjustment to the loan’s effective interest rate.

2. ACQUISITIONS

Merger of Equals

As described in Note 1 – Nature of Operations and Summary of Significant Accounting and Reporting Policies, the Merger was completed on October 1, 2022.

Allegiance merged with and into CBTX with the surviving corporation renamed Stellar Bancorp, Inc. At the effective date of the Merger, each outstanding share of Allegiance common stock was converted into the right to receive 1.4184 shares of common stock of the Company.

The Company issued 28.1 million shares of its common stock to Allegiance shareholders in connection with the Merger, which represented 54.0% of the voting interests in the Company upon completion of the Merger. In accordance with FASB ASC 805-40-30-2, the purchase price in a reverse acquisition is determined based on the number of equity interests the legal acquiree would have had to issue to give the owners of the legal acquirer the same percentage equity interest in the combined entity that results from the reverse acquisition.

The table below summarizes the ownership of the combined company following the Merger, for each shareholder group, using shares of CBTX and Allegiance common stock outstanding at September 30, 2022 and Allegiance’s closing price on September 30, 2022 (shares in thousands).

	Stellar Bancorp, Inc. Ownership
	Number of CBTX Outstanding Shares	Percentage Ownership
CBTX shareholders	24,015	46.0	%
Allegiance shareholders	28,137	54.0	%
Total	52,152	100.0	%

The Merger was accounted for as a reverse merger using the acquisition method of accounting, which means that for accounting and financial reporting purposes, Allegiance was deemed to have acquired CBTX in the Merger, even though CBTX was the legal acquirer. Accordingly, Allegiance's historical financial statements are the historical financial statements of the combined company for all periods prior to October 1, 2022.

Total acquisition and merger-related expenses recognized for the three months ended September 30, 2023 and 2022 were $3.4 million and $10.6 million, respectively, and $12.5 million and $12.7 million for the nine months ended September 30, 2023 and 2022, respectively.

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3. GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of the Company’s goodwill and core deposit intangible assets were as follows:

	Goodwill		Core Deposit Intangibles		Servicing Assets
	(In thousands)
Balance as of December 31, 2021	$	223,642	$	14,658	$	—
Acquired intangibles	273,618		138,150		329
Amortization	—		(9,283)		(20)
Balance as of December 31, 2022	497,260		143,525		309
Amortization	—		(20,581)		(55)
Measurement period adjustment	58		—		—
Decrease due to payoff of serviced loans	—		—		(27)
Balance as of September 30, 2023	$	497,318	$	122,944	$	227

Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired recorded on the acquisition date of an entity. During the measurement period, the Company may record subsequent adjustments to goodwill for provisional amounts recorded at the acquisition date. During the third quarter of 2023, the Company completed the final tax returns related to CBTX's business and operations through September 30, 2022. After completion of these tax returns, the Company increased income tax balances and goodwill in the amount of $58 thousand which finalized all purchase accounting adjustments for the Merger.

Goodwill is subject to impairment testing, which must be conducted at least annually or upon the occurrence of a triggering event. Various factors, such as the Company’s results of operations, the trading price of the Company’s common stock relative to the book value per share, macroeconomic conditions and conditions in the banking sector, inform whether a triggering event for an interim goodwill impairment test has occurred. Goodwill is recorded and evaluated for impairment at its reporting unit, the Company. The Company's policy is to test goodwill for impairment annually as of October 1st, or on an interim basis if an event triggering an impairment assessment is determined to have occurred.

Testing of goodwill impairment comprises a two-step process. First, the Company performs a qualitative assessment to evaluate relevant events or circumstances to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company determines that it is more likely than not that an impairment has occurred, it proceeds to the quantitative impairment test, whereby it calculates the fair value of the reporting unit and compares it with its carrying amount, including goodwill. In its performance of impairment testing, the Company has the unconditional option to proceed directly to the quantitative impairment test, bypassing the qualitative assessment. If the carrying amount of the reporting unit exceeds the fair value, the amount by which the carrying amount exceeds fair value, up to the carrying value of goodwill, is recorded through earnings as an impairment charge. If the results of the qualitative assessment indicate that it is not more likely than not that an impairment has occurred, or if the quantitative impairment test results in a fair value of the reporting unit that is greater than the carrying amount, then no impairment charge is recorded.

During the nine months ended September 30, 2023, economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering event requiring an interim goodwill impairment quantitative analysis for the third quarter 2023. As a result, the Company performed a qualitative assessment and quantitative impairment test on its only reporting unit as of September 30, 2023 and determined that there was no impairment as the fair value exceeded the carrying amount of the Company. If the Company had deemed intangible assets to be impaired, a non-cash charge for the amount of such impairment would be recorded through earnings and would have no impact on tangible capital or our regulatory capital.

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The estimated aggregate future amortization expense for core deposit intangible assets remaining as of September 30, 2023 is as follows (in thousands):

Remaining 2023	$	6,232
2024	24,166
2025	21,528
2026	18,896
Thereafter	52,122
Total	$	122,944

4. SECURITIES

The amortized cost and fair value of investment securities were as follows:

	September 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	409,152	$	129	$	(15,873)	$	393,408
Municipal securities	258,901		545		(40,330)		219,116
Agency mortgage-backed pass-through securities	378,573		22		(50,401)		328,194
Agency collateralized mortgage obligations	444,234		—		(78,356)		365,878
Corporate bonds and other	122,812		29		(14,485)		108,356
Total	$	1,613,672	$	725	$	(199,445)	$	1,414,952

	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	433,417	$	90	$	(19,227)	$	414,280
Municipal securities	580,076		4,319		(43,826)		540,569
Agency mortgage-backed pass-through securities	370,471		362		(42,032)		328,801
Agency collateralized mortgage obligations	461,760		—		(67,630)		394,130
Corporate bonds and other	143,192		2		(13,388)		129,806
Total	$	1,988,916	$	4,773	$	(186,103)	$	1,807,586

As of September 30, 2023, no allowance for credit losses has been recognized on available for sale securities in an unrealized loss position as management does not believe any of the securities are impaired due to reasons of credit quality. This belief is based upon our analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors related to our available for sale securities and in consideration of our historical credit loss experience and internal forecasts. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. Furthermore, management does not have the intent to sell any of the securities classified as available for sale in the table above and believes that it is more likely than not that we will not have to sell any such securities before a recovery of cost. The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline.

The amortized cost and fair value of investment securities at September 30, 2023, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations at any time with or without call or prepayment penalties.

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	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	77,562	$	77,026
Due after one year through five years	185,518		174,016
Due after five years through ten years	141,625		125,892
Due after ten years	386,160		343,946
Subtotal	790,865		720,880
Agency mortgage-backed pass-through securities     and collateralized mortgage obligations	822,807		694,072
Total	$	1,613,672	$	1,414,952

Securities with unrealized losses segregated by length of time such securities have been in a continuous loss position are as follows:

	September 30, 2023
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	111,573	$	(3,328)	$	261,872	$	(12,545)	$	373,445	$	(15,873)
Municipal securities	18,062		(640)		166,011		(39,690)		184,073		(40,330)
Agency mortgage-backed     pass-through securities	79,012		(3,829)		248,186		(46,572)		327,197		(50,401)
Agency collateralized mortgage     obligations	13,881		(168)		351,996		(78,188)		365,878		(78,356)
Corporate bonds and other	11,314		(1,249)		81,556		(13,236)		92,870		(14,485)
Total	$	233,842	$	(9,214)	$	1,109,621	$	(190,231)	$	1,343,463	$	(199,445)

	December 31, 2022
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	99,732	$	(1,427)	$	305,256	$	(17,800)	$	404,988	$	(19,227)
Municipal securities	228,192		(14,473)		134,640		(29,353)		362,832		(43,826)
Agency mortgage-backed      pass-through securities	95,291		(7,612)		199,836		(34,420)		295,127		(42,032)
Agency collateralized mortgage      obligations	117,147		(14,426)		276,925		(53,204)		394,072		(67,630)
Corporate bonds and other	72,913		(5,704)		49,893		(7,684)		122,806		(13,388)
Total	$	613,275	$	(43,642)	$	966,550	$	(142,461)	$	1,579,825	$	(186,103)

During the nine months ended September 30, 2023, the Company had sales and calls of securities of $320.5 million of securities recording gross gains of $234 thousand. During the nine months ended September 30, 2022, the Company sold $12.1 million of securities recording a gross gain of $42 thousand on the sale of those securities. At September 30, 2023 and December 31, 2022, the Company did not own securities of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of consolidated shareholders’ equity at such respective dates.

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The carrying value of pledged securities was $711.8 million at September 30, 2023 and $978.9 million at December 31, 2022. The majority of the securities in each case were pledged to collateralize public fund deposits.

5. LOANS AND ALLOWANCE FOR CREDIT LOSSES

The loan portfolio balances, net of unearned income and fees, consist of various types of loans primarily made to borrowers located within Texas and are segregated by class of loan as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Commercial and industrial	$	1,474,600	$	1,455,795
Paycheck Protection Program (PPP)	5,968		13,226
Real estate:
Commercial real estate (including multi-family residential)	4,076,606		3,931,480
Commercial real estate construction and land development	1,078,265		1,037,678
1-4 family residential (including home equity)	1,024,945		1,000,956
Residential construction	289,553		268,150
Consumer and other	54,591		47,466
Total loans	8,004,528		7,754,751
Allowance for credit losses on loans	(93,575)		(93,180)
Loans, net	$	7,910,953	$	7,661,571

Nonaccrual and Past Due Loans

An aging analysis of the recorded investment in past due loans, segregated by class of loans, is included below. The Company defines recorded investment as the outstanding loan balances including net deferred loan fees, and excluding accrued interest receivable of $36.4 million and $34.1 million as of September 30, 2023 and December 31, 2022, respectively, due to immateriality.

	September 30, 2023
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	3,535	$	—	$	3,535	$	14,971	$	1,456,094	$	1,474,600
Paycheck Protection Program (PPP)	85		—		85		20		5,863		5,968
Real estate:
Commercial real estate (including      multi-family residential)	19,649		—		19,649		13,563		4,043,394		4,076,606
Commercial real estate construction     and land development	4,405		—		4,405		170		1,073,690		1,078,265
1-4 family residential (including     home equity)	4,742		—		4,742		8,442		1,011,761		1,024,945
Residential construction	3,389		—		3,389		635		285,529		289,553
Consumer and other	215		—		215		490		53,886		54,591
Total loans	$	36,020	$	—	$	36,020	$	38,291	$	7,930,217	$	8,004,528

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	December 31, 2022
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	1,591	$	—	$	1,591	$	25,297	$	1,428,907	$	1,455,795
Paycheck Protection Program (PPP)	517		—		517		105		12,604		13,226
Real estate:
Commercial real estate (including     multi-family residential)	3,222		—		3,222		9,970		3,918,288		3,931,480
Commercial real estate construction     and land development	851		—		851		—		1,036,827		1,037,678
1-4 family residential (including     home equity)	3,385		—		3,385		9,404		988,167		1,000,956
Residential construction	—		—		—		—		268,150		268,150
Consumer and other	192		—		192		272		47,002		47,466
Total loans	$	9,758	$	—	$	9,758	$	45,048	$	7,699,945	$	7,754,751

Credit Quality Indicators

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt. The Company utilizes a risk rating matrix to assign a risk rating to each of its loans. Loans are rated on a scale of 10 to 90. Risk ratings are updated on an ongoing basis and are subject to change by continuous loan monitoring processes including lending management monitoring, executive management and board committee oversight, and independent credit review. As part of the ongoing monitoring of the credit quality of the Company’s loan portfolio and methodology for calculating the allowance for credit losses, management assigns and tracks certain risk ratings to be used as credit quality indicators including trends related to (1) the weighted-average risk grade of loans, (2) the level of classified loans, (3) the delinquency status of loans, (4) nonperforming loans and (5) the general economic conditions in the our markets. Individual bankers, under the oversight of credit administration, review updated financial information for all pass grade commercial loans to reassess the risk grade on at least an annual basis. When a loan reaches a set of internally designated criteria, including Substandard or higher, a special assets officer will be involved in the monitoring of the loan on an on-going basis.

The following is a general description of the risk ratings used by the Company:

Pass—Credits in this category contain an acceptable amount of risk.

Special Mention—Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Substandard—Loans classified as substandard have well-defined weaknesses on a continuing basis and are inadequately protected by the current net worth and paying capacity of the borrower, declining collateral values, or a continuing downturn in their industry which is reducing their profits to below zero and having a significantly negative impact on their cash flow. These loans so classified are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Doubtful—Loans classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full on the basis of currently existing facts, conditions and values, highly questionable and improbable.

Loss—Loans classified as loss are to be charged-off or charged-down when payment is acknowledged to be uncertain or when the timing or value of payments cannot be determined. “Loss” is not intended to imply that the loan or some portion of it will never be paid, nor does it in any way imply that there has been a forgiveness of debt.

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The following table presents risk ratings by category and the gross charge-offs by primary loan type and year of origination or renewal. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of September 30, 2023 and December 31, 2022:

	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans		Total		Total
	2023		2022		2021		2020		2019		Prior
	(In thousands)
Commercial and industrial
Pass	$	249,626	$	299,874	$	194,032	$	47,217	$	31,150	$	23,062	$	528,399	$	63,180	$	1,436,540	$	1,400,191
Special Mention	2,786		403		508		438		861		—		3,054		102		8,152		18,982
Substandard	1,250		3,925		9,303		1,140		12,131		281		1,057		771		29,858		36,568
Doubtful	—		50		—		—		—		—		—		—		50		54
Total commercial and industrial     loans	$	253,662	$	304,252	$	203,843	$	48,795	$	44,142	$	23,343	$	532,510	$	64,053	$	1,474,600	$	1,455,795
Current period gross charge-offs	$	—	$	130	$	4,264	$	456	$	129	$	—	$	4,143	$	531	$	9,653
Paycheck Protection Program (PPP)
Pass	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Special Mention	—		—		—		—		—		—		—		—		—		—
Substandard	—		—		—		—		—		—		—		—		—		—
Doubtful	—		—		—		—		—		—		—		—		—		—
Total PPP loans	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate     (including multi-family residential)
Pass	$	366,601	$	1,327,957	$	863,078	$	467,867	$	348,105	$	480,980	$	128,848	$	11,052	$	3,994,488	$	3,844,951
Special Mention	934		508		7,756		8,409		1,716		12,414		305		—		32,042		18,183
Substandard	3,906		5,050		16,003		6,832		5,009		12,890		286		100		50,076		68,346
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     (including multi-family     residential) loans	$	371,441	$	1,333,515	$	886,837	$	483,108	354830		$	506,284	$	129,439	$	11,152	$	4,076,606	$	3,931,480
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate construction     and land development
Pass	$	211,096	$	518,943	$	227,438	$	29,351	$	9,689	$	6,189	$	58,463	$	693	$	1,061,862	$	1,025,141
Special Mention	—		2,222		2,062		139		—		202		—		—		4,625		832
Substandard	22		1,016		10,406		88		80		17		—		149		11,778		11,705
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     construction and land development	$	211,118	$	522,181	$	239,906	$	29,578	$	9,769	$	6,408	$	58,463	$	842	$	1,078,265	$	1,037,678
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

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	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans
	2023		2022		2021		2020		2019		Prior						Total		Total
	(In thousands)
1-4 family residential (including     home equity)
Pass	$	132,680	$	252,160	$	224,562	$	116,514	$	72,701	$	90,921	$	94,320	$	10,248	$	994,106	$	969,396
Special Mention	499		569		—		1,996		333		195		98		—		3,690		3,714
Substandard	1,940		2,399		3,103		1,468		3,893		4,493		7,071		2,782		27,149		27,846
Doubtful	—		—		—		—		—		—		—		—		—		—
Total 1-4 family residential     (including home equity)	$	135,119	$	255,128	$	227,665	$	119,978	$	76,927	$	95,609	$	101,489	$	13,030	$	1,024,945	$	1,000,956
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	23	$	—	$	—	$	23
Residential construction
Pass	$	116,508	$	136,500	$	6,341	$	4,117	$	658	$	499	$	21,710	$	—	$	286,333	$	266,943
Special Mention	—		634		—		—		—		—		—		—		634		421
Substandard	—		635		1,951		—		—		—		—		—		2,586		786
Doubtful	—		—		—		—		—		—		—		—		—		—
Total residential construction	$	116,508	$	137,769	$	8,292	$	4,117	$	658	$	499	$	21,710	$	—	$	289,553	$	268,150
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Consumer and other
Pass	$	23,489	$	9,146	$	4,130	$	2,005	$	676	$	465	$	13,192	$	901	$	54,004	$	47,062
Special Mention	—		26		—		—		—		—		45		—		71		43
Substandard	—		312		35		—		56		5		4		104		516		361
Doubtful	—		—		—		—		—		—		—		—		—		—
Total consumer and other	$	23,489	$	9,484	$	4,165	$	2,005	$	732	$	470	$	13,241	$	1,005	$	54,591	$	47,466
Current period gross charge-offs	$	—	$	44	$	—	$	—	$	—	$	—	$	1	$	—	$	45
Total loans
Pass	$	1,100,000	$	2,544,580	$	1,522,799	$	669,821	$	462,979	$	602,116	$	844,932	$	86,074	$	7,833,301	$	7,566,910
Special Mention	4,219		4,362		10,326		10,982		2,910		12,811		3,502		102		49,214		42,175
Substandard	7,118		13,337		40,801		9,528		21,169		17,686		8,418		3,906		121,963		145,612
Doubtful	—		50		—		—		—		—		—		—		50		54
Total loans	$	1,111,337	$	2,562,329	$	1,573,926	$	690,331	$	487,058	$	632,613	$	856,852	$	90,082	$	8,004,528	$	7,754,751
Current period gross charge-offs	$	—	$	174	$	4,264	$	456	$	129	$	23	$	4,144	$	531	$	9,721

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The following table presents the activity in the allowance for credit losses on loans by portfolio type for the three and nine months ended September 30, 2023 and 2022:

	Commercial and industrial		Paycheck Protection Program (PPP)		Commercial real estate (including multi-family residential)		Commercial real estate construction and land development		1-4 family residential (including home equity)		Residential construction		Consumer and other		Total
	(In thousands)
Allowance for credit losses on     loans:
Three Months Ended
Balance June 30, 2023	$	38,505	$	—	$	38,963	$	14,500	$	4,757	$	3,080	$	390	$	100,195
Provision for credit losses on loans	2,173		—		58		(791)		34		(221)		243		1,496
Charge-offs	(8,169)		—		—		—		—		—		(7)		(8,176)
Recoveries	55		—		2		—		—		—		3		60
Net charge-offs	(8,114)		—		2		—		—		—		(4)		(8,116)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Nine Months Ended
Balance December 31, 2022	$	41,236	$	—	$	32,970	$	14,121	$	2,709	$	1,796	$	348	$	93,180
Provision for credit losses on loans	(143)		—		6,037		(412)		2,096		1,063		298		8,939
Charge-offs	(9,653)		—		—		—		(23)		—		(45)		(9,721)
Recoveries	1,124		—		16		—		9		—		28		1,177
Net charge-offs	(8,529)		—		16		—		(14)		—		(17)		(8,544)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Three Months Ended
Balance June 30, 2022	$	16,701	$	—	$	24,000	$	7,399	$	1,036	$	1,048	$	58	$	50,242
Provision for credit losses on loans	(1,091)		—		1,606		952		(9)		188		14		1,660
Charge-offs	(2)		—		(56)		—		—		—		(17)		(75)
Recoveries	319		—		—		—		—		—		1		320
Net recoveries	317		—		(56)		—		—		—		(16)		245
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147
Nine Months Ended
Balance December 31, 2021	$	16,629	$	—	$	23,143	$	6,263	$	847	$	975	$	83	$	47,940
Provision for credit losses on loans	(464)		—		2,740		2,096		180		261		37		4,850
Charge-offs	(958)		—		(383)		(63)		—		—		(65)		(1,469)
Recoveries	720		—		50		55		—		—		1		826
Net charge-offs	(238)		—		(333)		(8)		—		—		(64)		(643)
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147

Allowance for Credit Losses on Unfunded Commitments

In addition to the allowance for credit losses on loans, the Company has established an allowance for credit losses on unfunded commitments, classified in other liabilities and adjusted as a provision for credit loss expense. The allowance represents estimates of expected credit losses over the contractual period in which there is exposure to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on the commitments expected to fund. The estimate of commitments expected to fund is informed by historical analysis looking at utilization rates. The expected credit loss rates applied to the commitments expected to fund is informed by the general valuation allowance utilized for outstanding balances with the same underlying assumptions and drivers. The allowance for credit losses on unfunded commitments as of September 30, 2023 and December 31, 2022 was $10.9 million and $12.0 million, respectively. This reserve is maintained at a level management believes to be sufficient to absorb losses arising from unfunded loan commitments. The Company recorded an $818 thousand provision on unfunded commitments during the three months ended September 30, 2023 compared to $302 thousand for the three months ended September 30, 2022 and recorded a $1.0 million reversal of provision on unfunded commitments for the nine months ended September 30, 2023 compared to a provision of $1.1 million for the nine months ended September 30, 2022.

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Collateral dependent loans are secured by real estate assets, accounts receivable, inventory and equipment. For a collateral dependent loan, the Company’s evaluation process includes a valuation by appraisal or other collateral analysis adjusted for selling costs, when appropriate. This valuation is compared to the remaining outstanding principal balance of the loan. If a loss is determined to be probable, the loss is included in the allowance for credit losses on loans as a specific allocation.

The following tables present the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses as of September 30, 2023 and December 31, 2022:

	September 30, 2023
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	7,476	$	—	$	7,476
Real estate:
Commercial real estate (including multi-family residential)	3,411		—		—		3,411
Commercial real estate construction and land development			—		—		—
1-4 family residential (including home equity)	—		—		—		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	3,411	$	7,476	$	—	$	10,887

	December 31, 2022
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	18,411	$	30	$	18,441
Real estate:
Commercial real estate (including multi-family residential)	1,612		—		—		1,612
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	3,478		—		—		3,478
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	5,090	$	18,411	$	30	$	23,531

The following tables present additional information regarding nonaccrual loans. No interest income was recognized on nonaccrual loans as of September 30, 2023 and December 31, 2022.

	September 30, 2023
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	10,337	$	4,634	$	14,971
Paycheck Protection Program (PPP)	20		—		20
Real estate:
Commercial real estate (including multi-family residential)	10,820		2,743		13,563
Commercial real estate construction and land development	170		—		170
1-4 family residential (including home equity)	6,849		1,593		8,442
Residential construction	635		—		635
Consumer and other	81		409		490
Total loans	$	28,912	$	9,379	$	38,291

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	December 31, 2022
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	2,776	$	22,521	$	25,297
Paycheck Protection Program (PPP)	105		—		105
Real estate:
Commercial real estate (including multi-family residential)	8,704		1,266		9,970
Commercial real estate construction and land development	—		—		—
1-4 family residential (including home equity)	4,856		4,548		9,404
Residential construction	—		—		—
Consumer and other	94		178		272
Total loans	$	16,535	$	28,513	$	45,048

Loan Modifications and Troubled Debt Restructurings

Effective January 1, 2023, under ASU 2022-02, loan modifications are reported if concessions have been granted to borrowers that are experiencing financial difficulty. Information on these loan modifications originated after the effective date is presented according to the new accounting guidance. Reporting periods prior to the adoption of ASU 2022-02 present information on troubled debt restructurings ("TDRs") under the previous disclosure requirements. The percentage of loans modified comprised less than 1% of their respective classes of loan portfolios at September 30, 2023.

The following tables present information regarding loans that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

		Three Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Real estate:
Commercial real estate (including     multi-family residential)		—		1,890		—		—		—		—		1,890
Commercial real estate construction and land development		—				—		—		—		—		—
1-4 family residential (including home equity)		—		322		99		—		—		71		492
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		—		—		—		—		—		—
Total		$	—	$	2,212	$	—	$	—	$	—	$	71	$	2,382

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		Nine Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	89	$	2,185	$	—	$	—	$	—	$	260	$	2,534
Real estate:
Commercial real estate (including multi-family residential)		—		2,670		—		—		—		1,703		4,373
Commercial real estate construction and land development		—		6,850		—		—		—		—		6,850
1-4 family residential (including home equity)		—		1,037		99		—		—		71		1,207
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		94		—		—		—		—		94
Total		$	89	$	12,836	$	99	$	—	$	—	$	2,034	$	15,058

The following table summarizes, by loan portfolio, the financial effect of the Company's loan modifications for the three and nine months ended September 30, 2023:

	Three Months Ended September 30, 2023			Nine Months Ended September 30, 2023
	Weighted Average Interest Rate Reduction		Weighted Average Term Extension	Weighted Average Interest Rate Reduction		Weighted Average Term Extension
			(months)			(months)
Commercial and industrial	—	%	—	2.0	%	12
Real estate:
Commercial real estate (including multi-family residential)	—	%	6	—	%	9
Commercial real estate construction and land development	—	%	—	—	%	12
1-4 family residential (including home equity)	1.5	%	24	1.5	%	16
Residential construction	—	%	—	—	%	—
Consumer and other	—	%	—	—	%	7

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The following table summarizes loans that had a payment default within the past twelve months that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

	Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness
	(In thousands)
Commercial and industrial	$	89	$	670	$	—	$	—
Real estate:
Commercial real estate (including multi-family residential)	—		—		—		—
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	—		715		99		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
	$	89	$	1,385	$	99	$	—

The following table presents information regarding loans modified in a troubled debt restructuring during the three and nine months ended September 30, 2022:

	Three Months Ended September 30, 2022					Nine Months Ended September 30, 2022
	Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment		Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Commercial and industrial	1	$	224	$	224	4	$	768	$	768
Real estate:
Commercial real estate (including multi-family residential)	—	—		—		4	1,207		1,207
Consumer and other	1	45		45		1	45		45
Total	2	$	269	$	269	9	$	2,020	$	2,020

Troubled debt restructurings resulted in no charge-offs during the nine months ended September 30, 2022. There were no loans modified under a trouble debt restructuring during the previous twelve-month period that subsequently defaulted during the nine-month period ended September 30, 2022. Default is determined to at 90 or more days past due. The trouble debt restructurings related to extending the amortization periods of the loans. The Company did not grant principal reductions on any restructured loans during the nine months ended September 30, 2022. There were no commitments to lend additional amounts to borrowers with trouble debt restructured loans for the three and nine months ended September 30, 2022.

6. LEASES

Lease payments over the expected term are discounted using the Company’s incremental borrowing rate for borrowings of similar terms. Generally, the Company cannot be reasonably certain about whether or not it will renew a lease until such time as the lease is within the last two years of the existing lease term. When the Company is reasonably certain that a renewal option will be exercised, it measures/remeasures the right-of-use asset and related lease liability using the lease payments specified for the renewal period or, if such amounts are unspecified, the Company generally assumes an increase (evaluated on a case-by-case basis in light of prevailing market conditions) in the lease payment over the final period of the existing lease term.

There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the nine months ended September 30, 2023 and 2022.

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At September 30, 2023, the Company had 31 leases consisting of branch locations and office space. On the September 30, 2023 balance sheet, the right-of-use asset is classified within premises and equipment and the lease liability is included in other liabilities. The Company also owns certain office facilities which it leases to outside parties under operating lessor leases; however, such leases are not significant. All leases were classified as operating leases. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term.

Certain leases include options to renew, with renewal terms that can extend the lease term from one to five years. Lease assets and liabilities include related options that are reasonably certain of being exercised. The depreciable life of leased assets are limited by the expected lease term.

Supplemental lease information at the dates indicated is as follows:

	September 30, 2023			December 31, 2022
	(Dollars in thousands)
Balance Sheet:
Operating lease right of use asset classified as premises and equipment	$	20,483		$	23,538
Operating lease liability classified as other liabilities	$	20,225		$	23,136
Weighted average lease term, in years	7.91			8.18
Weighted average discount rate	4.14		%	4.00		%

Lease costs for the dates indicated is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(In thousands)
Income Statement:
Operating lease cost	$	1,885	$	836	$	5,280	$	2,559
Short-term lease cost	8		—		21		—
Total operating lease costs	$	1,893	$	836	$	5,301	$	2,559

A maturity analysis of the Company’s lease liabilities is as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Lease payments due:
Within one year	$	1,171	$	4,634
After one but within two years	4,137		4,121
After two but within three years	3,681		3,684
After three but within four years	3,125		3,132
After four but within five years	2,914		2,918
After five years	9,279		9,303
Total lease payments	24,307		27,792
Less: discount on cash flows	4,082		4,656
Total lease liability	$	20,225	$	23,136

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7. FAIR VALUE

The Company uses fair value measurements to record fair value adjustments to certain assets and to determine fair value disclosures. Fair value represents the exchange price that would be received from selling an asset or paid to transfer a liability, otherwise known as an “exit price,” in the principal or most advantageous market available to the entity in an orderly transaction between market participants on the measurement date.

Fair Value Hierarchy

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company groups financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

•Level 1—Quoted prices for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

•Level 2—Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

•Level 3—Significant unobservable inputs that reflect management’s judgment and assumptions that market participants would use in pricing an asset or liability that are supported by little or no market activity.

The carrying amounts and estimated fair values of financial instruments that are reported on the balance sheet are as follows:

	September 30, 2023
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	302,272	$	302,272	$	—	$	—	$	302,272
Available for sale securities	1,414,952		—		1,414,952		—		1,414,952
Loans held for investment, net of allowance	7,910,953		—		—		7,615,073		7,615,073
Accrued interest receivable	43,536		176		6,947		36,413		43,536
Financial liabilities
Deposits	$	8,686,621	$	—	$	8,677,026	$	—	$	8,677,026
Accrued interest payable	7,612		—		7,612		—		7,612
Borrowed funds	323,981		—		323,998		—		323,998
Subordinated debt	109,665		—		107,469		—		107,469

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	December 31, 2022
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	371,705	$	371,705	$	—	$	—	$	371,705
Available for sale securities	1,807,586		—		1,807,586		—		1,807,586
Loans held for investment, net of allowance	7,661,571		—		—		7,555,602		7,555,602
Accrued interest receivable	44,743		25		10,585		34,133		44,743
Financial liabilities
Deposits	$	9,267,632	$	—	$	9,256,141	$	—	$	9,256,141
Accrued interest payable	2,098		—		2,098		—		2,098
Borrowed funds	63,925		—		63,999		—		63,999
Subordinated debt	109,367		—		107,910		—		107,910

The following tables present fair values for assets and liabilities measured at fair value on a recurring basis. There were no liabilities measured at fair value on a recurring basis as of September 30, 2023.

	September 30, 2023
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	393,408	$	—	$	393,408
Municipal securities	—		219,116		—		219,116
Agency mortgage-backed pass-through securities	—		328,194		—		328,194
Agency collateralized mortgage obligations	—		365,878		—		365,878
Corporate bonds and other	—		108,356		—		108,356
Interest rate swaps	—		—		10,218		10,218
Credit risk participation agreements	—		—		10		10
Total fair value of financial assets	$	—	$	1,414,952	$	10,228	$	1,425,180
Financial liabilities
Interest rate swaps	$	—	$	—	$	10,218	$	10,218
Total fair value of financial liabilities	$	—	$	—	$	10,218	$	10,218

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	December 31, 2022
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	414,280	$	—	$	414,280
Municipal securities	—		540,569		—		540,569
Agency mortgage-backed pass-through securities	—		328,801		—		328,801
Agency collateralized mortgage obligations	—		394,130		—		394,130
Corporate bonds and other	—		129,806		—		129,806
Interest rate swaps	—		—		9,263		9,263
Credit risk participation agreements	—		—		27		27
Total fair value of financial assets	$	—	$	1,807,586	$	9,290	$	1,816,876
Financial liabilities
Interest rate swaps	$	—	$	—	$	9,263	$	9,263
Total fair value of financial liabilities	$	—	$	—	$	9,263	$	9,263

There were no transfers between levels during the nine months ended September 30, 2023 or 2022.

Assets measured at fair value on a nonrecurring basis are summarized in the table below. There were no liabilities measured at fair value on a nonrecurring basis at September 30, 2023 and December 31, 2022.

	September 30, 2023
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	13,830
Commercial real estate (including multi-family residential)	—		—		7,706
Commercial real estate construction and land development	—		—		6,654
1-4 family residential (including home equity)	—		—		2,776
Consumer and other	—		—		88
Branch assets held for sale	5,852		—		—
	$	5,852	$	—	$	31,054

	December 31, 2022
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	21,948
Commercial real estate (including multi-family residential)	—		—		11,566
1-4 family residential (including home equity)	—		—		2,883
Branch assets held for sale	5,165		—		—
	$	5,165	$	—	$	36,397

Branch assets held for sale include banking centers that have closed and are for sale.

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8. DEPOSITS

Time deposits that met or exceeded the Federal Deposit Insurance Corporation ("FDIC") insurance limit of $250,000 thousand at September 30, 2023 and December 31, 2022 were $560.2 million and $432.9 million, respectively.

Scheduled maturities of time deposits for the next five years are as follows (in thousands):

Within one year	$	1,399,265
After one but within two years	85,040
Over three years	19,586
Total	$	1,503,891

The Company had $579.0 million and $72.5 million of brokered deposits as of September 30, 2023 and December 31, 2022, respectively. There were no concentrations of deposits with any one depositor at September 30, 2023 and December 31, 2022.

9. DERIVATIVE INSTRUMENTS

Financial derivatives are reported at fair value in other assets or other liabilities. The accounting for changes in the fair value of a derivative depends on whether it has been designated and qualifies as part of a hedging relationship.

Derivatives not designated as hedges

The Company has outstanding interest rate swap contracts with certain customers and equal and offsetting interest rate swaps with other financial institutions entered into at the same time. These interest rate swap contracts are not designated as hedging instruments for mitigating interest rate risk. The objective of the transactions is to allow customers to effectively convert a variable rate loan to a fixed rate.

In connection with each swap transaction, the Company agreed to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agreed to pay a third-party financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. Because the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts are designed to offset each other and do not significantly impact the Company’s operating results except in certain situations where there is a significant deterioration in the customer’s credit worthiness or that of the counterparties. At September 30, 2023, management determined there was no such deterioration.

At September 30, 2023 and December 31, 2022, the Company had 15 and 14 interest rate swap agreements outstanding with borrowers and financial institutions, respectively. These derivative instruments are not designated as accounting hedges and changes in the net fair value are recognized in other noninterest income. Fair value amounts are included in other assets and other liabilities.

At September 30, 2023 and December 31, 2022, the Company had three credit risk participation agreements with another financial institution that are associated with interest rate swaps related to loans for which the Company is the lead agent bank and the other financial institution provides credit protection to the Company should the borrower fail to perform under the terms of the interest rate swap agreements. The fair value of the agreements is determined based on the market value of the underlying interest rate swaps adjusted for credit spreads and recovery rates.

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Derivative instruments not designated as hedges outstanding as of September 30, 2023 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	110,946	$	9,758	3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Financial institutions	Other assets	4,940		460		4.99%	U.S. Prime	4.21
Customers	Other liabilities	4,940		(460)		4.99%	U.S. Prime	4.21
Customers	Other liabilities	110,946		(9,758)		3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Credit risk participations:
Financial institutions	Other assets	20,958		10		3.50% - 5.40%	SOFR CME 1M + 2.50%	7.58

Derivative instruments not designated as hedges outstanding as of December 31, 2022 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	109,242	$	8,856	3.25% - 5.58%	SOFR CME 1M + 2.50% - 3.00%	5.49
Financial institutions	Other assets	5,029		407		4.99%	U.S. Prime	4.96
Customers	Other liabilities	5,029		(407)		4.99%	U.S. Prime	4.96
Customers	Other liabilities	109,242		(8,856)		3.25% - 5.58%	SOFR CME 1M + 2.50%	5.49
Credit risk participations:
Financial institutions	Other assets	13,028		2		3.50%	LIBOR 1M + 2.50%	7.24
Financial institutions	Other assets	8,485		25		5.35% - 5.40%	SOFR CME 1M + 2.50%	9.97

10. BORROWINGS AND BORROWING CAPACITY

The Company has an available line of credit with the Federal Home Loan Bank (“FHLB”) of Dallas, which allows the Company to borrow on a collateralized basis. FHLB advances are used to manage liquidity as needed. The advances are secured by a blanket lien on certain loans. Maturing advances are replaced by drawing on available cash, making additional borrowings or through increased customer deposits. At September 30, 2023, the Company had a total borrowing capacity with the FHLB of $3.82 billion, of which $2.28 billion was available and $1.54 billion was outstanding in/through FHLB advances and letters of credit. There were $324.0 million of FHLB short-term advances outstanding at September 30, 2023 at a weighted-average rate of 5.62%. Letters of credit were $1.22 billion at September 30, 2023, of which $50.8 million will expire during the remaining months of 2023, $72.8 million will expire in 2024, $494.5 million will expire in 2025, $57.3 million will expire in 2026, $448.0 million will expire in 2027, $40.0 million will expire in 2028, $27.0 million will expire in 2029 and $30.0 million will expire in 2031.

On December 13, 2022, the Company entered into a loan agreement with another financial institution, or the Loan Agreement, that provides for a $75.0 million revolving line of credit. At September 30, 2023, there were no outstanding borrowings on this line of credit and the Company did not draw on this line of credit during 2023 or 2022. The Company can make draws on the line

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of credit for a period of 24 months, which began on December 13, 2022, after which the Company will not be permitted to make further draws. Interest accrues on outstanding borrowings at a per annum rate equal to the prime rate quoted by The Wall Street Journal and with a floor rate of 3.50% calculated in accordance with the terms of the revolving promissory note and payable quarterly through the first 24 months. The entire outstanding balance and unpaid interest is payable in full on December 13, 2024.

The Company may prepay the principal amount of the line of credit without premium or penalty. The obligations of the Company under the Loan Agreement are secured by a pledge of all the issued and outstanding shares of capital stock of Stellar Bank.

Covenants made under the Loan Agreement include, among other things, while there any obligations outstanding under Loan Agreement, the Company shall maintain a cash flow to debt service (as defined in the Loan Agreement) of not less than 1.25, the Bank’s Texas Ratio (as defined in the Loan Agreement) not to exceed 25.0%, and the Bank shall maintain a Tier 1 Leverage Ratio (as defined under the Loan Agreement) of at least 7.0% and restrictions on the ability of the Company and its subsidiaries to incur certain additional debt. As of September 30, 2023, the Company believes it was in compliance with all such debt covenants and had not been made aware of any noncompliance by the lender.

11. SUBORDINATED DEBT

Junior Subordinated Debentures

In connection with the acquisition of F&M Bancshares, Inc., the Company assumed Farmers & Merchants Capital Trust II and Farmers & Merchants Capital Trust III. Each of these trusts is a capital or statutory business trust organized for the sole purpose of issuing trust securities and investing the proceeds in the Company’s junior subordinated debentures. The preferred trust securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common securities of each trust are wholly owned by the Company. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of payment to all of the Company’s present and future senior indebtedness. The Company has fully and unconditionally guaranteed each trust’s obligations under the trust securities issued by such trust to the extent not paid or made by such trust, provided such trust has funds available for such obligations. The junior subordinated debentures are included in Tier 1 capital under current regulatory guidelines and interpretations. Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and common securities will also be deferred.

A summary of pertinent information related to the Company’s issues of junior subordinated debentures outstanding at September 30, 2023 is set forth in the table below:

Description	Issuance Date	Trust Preferred Securities Outstanding		Interest Rate	Junior Subordinated Debt Owed to Trusts		Maturity Date(1)
(Dollars in thousands)
Farmers & Merchants Capital Trust II	November 13, 2003	$	7,500	3-Month SOFR + 3.26%	$	7,732	November 8, 2033
Farmers & Merchants Capital Trust III	June 30, 2005	3,500		3-Month SOFR + 2.06%	3,609		July 7, 2035
					$	11,341

(1) All debentures are currently callable.

Subordinated Notes

In December 2017, the Bank completed the issuance, through a private placement, of $40.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Bank Notes") due December 15, 2027. As of December 15, 2022, the Bank Notes bore a floating rate of interest equal to 3-Month LIBOR plus 3.03%, which transitioned to 3-Month SOFR plus a comparable spread adjustment immediately after June 30, 2023, until the Bank Notes mature on December 15, 2027, or such earlier redemption date, payable quarterly in arrears. The Bank Notes are redeemable by the Bank, in whole or in part, on or after December 15, 2022 or, in whole but not in part, upon the occurrence of certain specified tax events, capital events or investment company events. Any redemption will be at a redemption price equal to 100% of the principal amount of Bank Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Bank Notes are not subject to redemption at the

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option of the holders. The Bank Notes are eligible for Tier 2 capital treatment, however, during the last five years of the instrument, the amount eligible must be reduced by 20% of the original amount annually and that no amount of the instrument is eligible for inclusion in Tier 2 capital when the remaining maturity of the instrument is less than one year. As the Bank Notes were within five years of maturity, only 80% of the notes are eligible for Tier 2 capital treatment at September 30, 2023.

In September 2019, the Company completed the issuance of $60.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Company Notes") due October 1, 2029. The Company Notes bear a fixed interest rate of 4.70% per annum until (but excluding) October 1, 2024, payable semi-annually in arrears on April 1 and October 1, commencing on April 1, 2020. Thereafter, from October 1, 2024 through the maturity date, October 1, 2029, or earlier redemption date, the Company Notes will bear interest at a floating rate equal to the then-current 3-Month SOFR, plus 3.13%, which transitioned from LIBOR immediately after June 30, 2023, for each quarterly interest period, payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year. Any redemption will be at a redemption price equal to 100% of the principal amount of Company Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Company Notes are not subject to redemption at the option of the holders.

12. INCOME TAXES

The amount of the Company’s federal and state income tax expense is influenced by the amount of pre-tax income, the amount of tax-exempt income and the amount of other nondeductible items.

	Three Months Ended						Nine Months Ended
	September 30, 2023			September 30, 2022			September 30, 2023			September 30, 2022
Income tax expense	$	7,445		$	3,406		$	24,825		$	11,310
Effective income tax rate	19.4		%	19.3		%	19.4		%	18.6		%

Interest and penalties related to tax positions are recognized in the period in which they begin accruing or when the entity claims the position that does not meet the minimum statutory thresholds. The Company does not have any uncertain tax positions and does not have any interest or penalties recorded in the income statement for the three or nine months ended September 30, 2023.

13. STOCK BASED COMPENSATION

In connection with the closing of the Merger on October 1, 2022, the 2022 Omnibus Incentive Plan (the “2022 Plan”) approved by the Company’s shareholders at the special meeting of shareholders on May 23, 2022 became effective. Under the 2022 Plan, the Company is authorized to issue a maximum aggregate of 2,000,000 shares of common stock. All restricted stock and performance share awards outstanding at September 30, 2023 were issued under the 2022 Plan. At September 30, 2023, there were 1,017,319 shares reserved and available for issuance under the 2022 Plan.

The Company accounts for stock based employee compensation plans using the fair value-based method of accounting. The Company recognized total stock based compensation expense of $2.8 million and $969 thousand for the three months ended September 30, 2023 and 2022, respectively, and $8.2 million and $2.9 million for the nine months ended September 30, 2023 and 2022, respectively.

Stock Options

Stock options outstanding at September 30, 2023, were issued prior to the Merger under three equity compensation plans (1) the Allegiance 2015 Stock Awards and Incentive Plan, (2) the Allegiance 2019 Amended and Restated Stock Awards and Incentive Plan and (3) the CBTX 2014 Stock Option Plan. No additional shares may be issued under these compensation plans.

No options to purchase Company stock were granted during the nine months ended September 30, 2023. Options are exercisable for up to 10 years from the date of the grant and, dependent on the terms of the applicable award agreement generally vest three to four years after the date of grant. The fair value of stock options granted is estimated at the date of grant using the Black-Scholes option-pricing model.

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A summary of the activity in the stock option plans during the nine months ended September 30, 2023 is set forth below:

	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(Shares in thousands)			(In years)	(Dollars in thousands)
Options outstanding, January 1, 2023	368	$	17.89	2.72	$	4,256
Options granted	—	—
Options exercised	(49)	14.19
Options forfeited	(36)	20.67
Options outstanding, September 30, 2023	283	$	18.18	2.17	$	1,036
Options vested and exercisable, September 30, 2023	283	$	18.18	2.17	$	1,036

Restricted Stock Awards

The fair value of the Company’s restricted stock awards is estimated based on the market value of the Company’s common stock at the date of grant, which is the closing price of the Company’s common stock on the day before the grant date. The shares of restricted stock granted during 2023 generally vest over a period of two or three years from the date of grant and the Company accounts for shares of restricted stock by recording the fair value of the grant on the award date as compensation expense over the vesting period.

Shares of restricted stock are considered outstanding at the date of issuance as the grantee becomes the record owner of the restricted stock and has voting, dividend and other shareholder rights. The shares of restricted stock are non-transferable and subject to forfeiture until the restricted stock awards vest and any dividends with respect to the restricted stock awards are subject to the same restrictions, including the risk of forfeiture.

A summary of the activity of the nonvested shares of restricted stock during the nine months ended September 30, 2023 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
	(Shares in thousands)
Nonvested share awards outstanding, January 1, 2023	501	$	32.84
Share awards granted	262	25.67
Share awards vested	(14)	25.99
Unvested share awards forfeited or cancelled	(64)	31.03
Nonvested share awards outstanding, September 30, 2023	685	30.41

As of September 30, 2023, there was $13.1 million of total unrecognized compensation cost related to the restricted stock awards which is expected to be recognized over a weighted-average period of 1.70 years.

Performance Share Awards ("PSAs")

PSAs are generally earned subject to certain performance goals being met after the two-year performance period and will be settled in shares of Company common stock following a one-year service period. There were 119,845 PSAs awarded during the nine months ended September 30, 2023. The grant date fair value of the PSAs is based on the probable outcome of the applicable performance conditions and is calculated at target based on a combination of the closing market price of our common stock on the grant date and a Monte Carlo simulated fair value in accordance with ASC 718. At September 30, 2023, there was $2.0 million of unrecognized compensation expense related to the PSAs, which is expected to be recognized over a weighted-average period of 2.0 years.

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14. OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES

In the normal course of business, the Company enters into various transactions, which, in accordance with accounting principles generally accepted in the United States, are not included in the Company’s consolidated balance sheets. The Company enters into these transactions to meet the financing needs of its customers. These transactions include commitments to extend credit and standby and commercial letters of credit, which involve to varying degrees elements of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company uses the same credit policies in making commitments and conditional obligations as it does for on balance sheet instruments.

The contractual amounts of financial instruments with off-balance sheet risk are as follows:

	September 30, 2023				December 31, 2022
	Fixed Rate		Variable Rate		Fixed Rate		Variable Rate
	(In thousands)
Commitments to extend credit(1)	$	432,498	$	1,454,648	$	673,098	$	1,686,627
Standby letters of credit	14,507		23,249		10,310		25,190
Total	$	447,005	$	1,477,897	$	683,408	$	1,711,817

1)    At September 30, 2023 and December 31, 2022, the Company had FHLB Letters of Credit in the amount of $1.22 billion and $1.08 billion, respectively, pledged as collateral for public and other deposits of state and local government agencies. For more information on FHLB borrowings, see Note 10 – Borrowings and Borrowing Capacity.

Commitments to Extend Credit

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being fully drawn upon, the total commitment amounts disclosed do not necessarily represent future cash funding requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The Company minimizes its exposure to loss under these commitments by subjecting them to credit approval and monitoring procedures. Management assesses the credit risk associated with certain commitments to extend credit in determining the level of the allowance for credit losses. The amount and type of collateral, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the customer.

Commitments to make loans are generally made for an approval period of 120 days or fewer. As of September 30, 2023, the fixed rate loan commitments had interest rates ranging from 1.70% to 13.50% with a weighted average maturity and rate of 2.46 years and 6.28%, respectively.

Standby Letters of Credit

Standby letters of credit are written conditional commitments issued by the Company to guarantee the performance of a customer to a third party. In the event of nonperformance by the customer, the Company has the rights to the underlying collateral. The credit risk to the Company in issuing letters of credit is substantially similar to that involved in extending loan facilities to its customers. The Company’s policy for obtaining collateral, and the nature of such collateral, is substantially similar to that involved in making commitments to extend credit.

Litigation

The Company is subject to claims and lawsuits which arise primarily in the ordinary course of business. Based on information presently available and advice received from legal counsel representing the Company, it is the opinion of management that the disposition or ultimate determination of such claims and lawsuits will not have a material adverse effect on the financial position or results of operations of the Company.

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15. REGULATORY CAPITAL MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Capital adequacy guidelines, and for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities and certain off balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk weightings and other factors. Failure to meet minimum capital requirements can cause regulators to initiate actions that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. The final rules implementing Basel Committee on Banking Supervision's capital guideline for U.S. Banks (Basel III Rules) were fully phased in when the capital conservation buffer reached 2.5%. Management believes as of September 30, 2023 and December 31, 2022, the Company and the Bank met all capital adequacy requirements to which they were then subject.

Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If less than well capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required.

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The following is a summary of the Company’s and the Bank’s actual and required capital ratios as of September 30, 2023 and December 31, 2022:

	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required Plus Capital Conservation Buffer				To Be Categorized As Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
STELLAR BANCORP, INC.
(Consolidated)
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,201,404	13.42	%	$	716,402	8.00	%	$	940,278	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	997,556		11.14	%	402,976		4.50	%	626,852		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	1,007,454		11.25	%	537,302		6.00	%	761,177		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	1,007,454		9.82	%	410,344		4.00	%	410,344		4.00	%	N/A		N/A
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,092,618	12.39	%	$	705,765	8.00	%	$	926,317	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	885,652		10.04	%	396,993		4.50	%	617,545		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	895,520		10.15	%	529,324		6.00	%	749,876		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	895,520		8.55	%	418,720		4.00	%	418,720		4.00	%	N/A		N/A
STELLAR BANK
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,174,693	13.13	%	$	715,650	8.00	%	$	939,290	10.50	%	$	894,562	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	1,040,743		11.63	%	402,553		4.50	%	626,193		7.00	%	581,465		6.50	%
Tier 1 Capital (to risk-weighted     assets)	1,040,743		11.63	%	536,737		6.00	%	760,378		8.50	%	715,650		8.00	%
Tier 1 Leverage (to average tangible     assets)	1,040,743		10.15	%	409,957		4.00	%	409,957		4.00	%	512,446		5.00	%
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,059,313	12.02	%	$	705,120	8.00	%	$	925,470	10.50	%	$	881,400	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	921,714		10.46	%	396,630		4.50	%	616,980		7.00	%	572,910		6.50	%
Tier 1 Capital (to risk-weighted     assets)	921,714		10.46	%	528,840		6.00	%	749,190		8.50	%	705,120		8.00	%
Tier 1 Leverage (to average tangible     assets)	921,714		8.81	%	418,388		4.00	%	418,388		4.00	%	522,984		5.00	%

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16. EARNINGS PER COMMON SHARE

Diluted earnings per common share is computed using the weighted-average number of common shares determined for the basic earnings per common share computation plus the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock using the treasury stock method. Outstanding stock options issued by the Company represent the only dilutive effect reflected in diluted weighted average shares. Restricted shares and performance share awards are considered outstanding at the date of grant, accounted for as participating securities and included in basic and diluted weighted average common shares outstanding.

	Three Months Ended September 30,								Nine Months Ended September 30,
	2023				2022				2023				2022
	Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount
	(Amounts in thousands, except per share data)
Net income attributable to shareholders	$	30,908			$	14,286			$	103,231			$	49,380
Basic:
Weighted average shares outstanding	53,313		$	0.58	28,286		$	0.51	53,211		$	1.94	28,679		$	1.72
Diluted:
Add incremental shares for:
Dilutive effect of stock option exercises and performance share units	67				244				89				222
Total	53,380		$	0.58	28,530		$	0.50	53,300		$	1.94	28,901		$	1.71

There were 28,372 and no antidilutive shares as of September 30, 2023 and 2022, respectively.

The basic and diluted weighted average number of shares issued and earnings per share have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of Allegiance common stock in the Merger.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Except where the context otherwise requires or where otherwise indicated in this Quarterly Report on Form 10-Q, the term “Stellar” refers to Stellar Bancorp, Inc., the terms “we,” “us,” “our,” “Company” and “our business” refer to Stellar Bancorp, Inc. and our wholly owned banking subsidiary, Stellar Bank, a Texas banking association.

Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward‑looking statements. These forward‑looking statements reflect the Company’s current views with respect to, among other things, future events and the Company’s financial performance. These statements are often, but not always, made through the use of words or phrases such as “may,” “should,” “could,” “predict,” “potential,” “believe,” “will likely result,” “expect,” “continue,” “will,” “anticipate,” “seek,” “estimate,” “intend,” “plan,” “projection,” “would” and “outlook,” or the negative version of those words or other comparable words or phrases of a future or forward‑looking nature. These forward‑looking statements are not historical facts, and are based on current expectations, estimates and projections about the Company’s industry, management’s beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond the Company’s control. Accordingly, the Company cautions that any such forward‑looking statements are not guarantees of future performance and are subject to risks, assumptions and uncertainties that are difficult to predict. Although the Company believes that the expectations reflected in these forward‑looking statements are reasonable as of the date made, actual results may prove to be materially different from the results expressed or implied by the forward‑looking statements.

There are or will be important factors that could cause the Company’s actual results to differ materially from those indicated in these forward‑looking statements, including, but not limited to, the risks described in “Part I— Item 1A.—Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 and the following:

•disruptions to the economy and the U.S. banking system caused by recent bank failures;

•risks associated with uninsured deposits and responsive measures by federal or state governments or banking regulators, including increases in our deposit insurance assessments and other actions of the Board of Governors of the Federal Reserve System, Federal Deposit Insurance Corporation and Texas Department of Banking and legislative and regulatory actions and reforms;

•the effects of and changes in trade and monetary and fiscal policies and laws, including the interest rate policies of the Federal Reserve Board;

•inflation, interest rate, capital and securities markets and monetary fluctuations;

•changes in the interest rate environment, the value of Stellar’s assets and obligations and the availability of capital and liquidity;

•general competitive, economic, political and market conditions and other factors that may affect future results of the Company including changes in asset quality and credit risk; the inability to sustain revenue and earnings growth;

•local, regional, national and international economic conditions and the impact they may have on the Company and our customers and the Company’s assessment of that impact;

•the inability to sustain revenue and earnings growth;

•impairment of the Company's goodwill or other intangible assets;

•the composition of the Company’s loan portfolio and the concentration of loans in commercial real estate and commercial real estate construction;

•the geographic concentration of the Company’s markets;

•the accuracy and sufficiency of the assumptions and estimates the Company makes in establishing reserves for potential loan losses and other estimates;

•the amount of nonperforming and classified assets that the Company holds and the time and effort necessary to resolve nonperforming assets;

•deterioration of asset quality;

•customer borrowing, repayment, investment and deposit practices;

•the Company’s ability to maintain important deposit customer relationships;

•changes in the value of collateral securing the Company’s loans;

•the risk that the expected cost savings and any revenue synergies from the Merger may not be fully realized or may take longer than anticipated to be realized;

•the amount of the costs, fees, expenses and charges related to the Merger;

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•reputational risk and the reaction of our customers, suppliers, employees or other business partners to the Merger;

•natural disasters and adverse weather on the Company’s market area;

•the potential impact of climate change;

•the impact of pandemics, epidemics or any other health-related crisis;

•acts of terrorism, an outbreak of hostilities, such as the conflicts in Ukraine or the Middle East, or other international or domestic calamities;

•the Company’s ability to maintain effective internal control over financial reporting;

•the cost and effects of cyber incidents or other failures, interruptions or security breaches of the Company's systems or those of the Company's customers or third-party providers;

•the failure of certain third- or fourth-party vendors to perform;

•the impact, extent and timing of technological changes;

•the institution and outcome of litigation and other legal proceedings against the Company or to which it may become subject;

•the costs, effects and results of regulatory examinations, investigations, or reviews or the ability to obtain required regulatory approvals or meet conditions associated with the same;

•changes in the laws, rules, regulations, interpretations or policies relating to financial institution, accounting, tax, trade, monetary and fiscal matters;

•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, the Financial Accounting Standards Board and other accounting standard setters; and

•other risks, uncertainties, and factors that are discussed from time to time in the Company’s reports and documents filed with the SEC.

The foregoing factors should not be construed as exhaustive and should be read together with the other cautionary statements included in this Quarterly Report on Form 10-Q. If one or more events related to these or other risks or uncertainties materialize, or if the Company’s underlying assumptions prove to be incorrect, actual results may differ materially from what is anticipated. Undue reliance should not be placed on any such forward‑looking statements. Any forward‑looking statement speaks only as of the date made, and the Company does not undertake any obligation to publicly update or review any forward‑looking statement, whether as a result of new information, future developments or otherwise. New factors emerge from time to time, and it is not possible to predict which will arise. In addition, the Company cannot assess the impact of each factor on its business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward‑looking statements.

Overview

We generate most of our income from interest income on loans, interest income from investments in securities and service charges on customer accounts. We incur interest expense on deposits and other borrowed funds and noninterest expenses such as salaries and employee benefits and occupancy expenses. Net interest income is the difference between interest income on earning assets such as loans and securities and interest expense on liabilities such as deposits and borrowings that are used to fund those assets. Net interest income is our largest source of revenue. To evaluate net interest income, we measure and monitor (1) yields on our loans and other interest-earning assets, (2) the interest expenses of our deposits and other funding sources, (3) our net interest spread and (4) our net interest margin. Net interest spread is the difference between rates earned on interest-earning assets and rates paid on interest-bearing liabilities. Net interest margin is calculated as net interest income divided by average interest-earning assets. Because noninterest-bearing sources of funds, such as noninterest-bearing deposits and shareholders’ equity, also fund interest-earning assets, net interest margin includes the benefit of these noninterest-bearing sources.

Our net interest income is affected by changes in the amount and mix of interest-earning assets and interest-bearing liabilities, referred to as a “volume change.” Periodic changes in the volume and types of loans in our loan portfolio are affected by, among other factors, economic and competitive conditions in Texas and specifically in our markets, as well as developments affecting the real estate, technology, financial services, insurance, transportation, manufacturing and energy sectors within our markets and throughout the state of Texas.

Our net interest income is also affected by changes in yields earned on interest-earning assets and rates paid on interest-bearing deposits and borrowed funds, referred to as a “rate change.” Fluctuations in market interest rates are driven by many factors, including governmental monetary policies, inflation, deflation, macroeconomic developments, changes in unemployment, the money supply, political and international conditions and conditions in domestic and foreign financial markets.

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Merger of Equals

Allegiance Bancshares, Inc. (“Allegiance”) merged with and into CBTX, Inc. (“CBTX”) with the surviving corporation renamed Stellar Bancorp, Inc. At the effective time of the Merger, each outstanding share of Allegiance common stock, par value of $1.00 per share, was converted into the right to receive 1.4184 shares of common stock of the Company. Immediately following the Merger, CommunityBank merged with and into Allegiance Bank with Allegiance Bank as the surviving bank. Allegiance Bank changed its name to Stellar Bank on February 18, 2023 in connection with the operational conversion. After the Merger, Stellar became one of the largest banks based in Houston, Texas.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Allegiance was the accounting acquirer and CBTX was the legal acquirer and the accounting acquiree. Accordingly, the historical financial statements of Allegiance became the historical financial statements of the combined company. In addition, the assets and liabilities of CBTX have been recorded at their estimated fair values and added to those of Allegiance as of October 1, 2022. The determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events. During the third quarter of 2023, the Company completed the final tax returns related to CBTX's business and operations through September 30, 2022. After completion of these tax returns, the Company increased income tax balances and goodwill in the amount of $58 thousand which finalized all purchase accounting adjustments for the Merger.

The Company’s results of operations for the three and nine months ended September 30, 2022 reflect Allegiance results, while the results for the three and nine months ended September 30, 2023 set forth the results of operations for the Company. The Merger had a significant impact on all aspects of the Company’s financial statements, and financial results for periods after the Merger are not comparable to financial results for periods prior to the Merger. The number of shares issued and outstanding, earnings per share, additional paid-in capital, dividends paid and all references to share quantities of the Company prior to the Merger have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of Allegiance common stock in the Merger. See Note 2 – Acquisitions in the accompanying notes to the consolidated financial statements for the impact of the Merger.

Critical Accounting Policies

Certain of our accounting estimates are important to the portrayal of our financial condition, since they require management to make difficult, complex or subjective judgments, some of which may relate to matters that are inherently uncertain. Estimates are susceptible to material changes as a result of changes in facts and circumstances. Facts and circumstances that could affect these judgments include, but are not limited to, changes in interest rates, changes in the performance of the economy and changes in the financial condition of borrowers. Management believes that determining the allowance for credit losses is its most critical accounting estimate. Our accounting policies are discussed in detail in Note 1 – Nature of Operations and Summary of Significant Accounting and Reporting Policies in our Annual Report on Form 10-K for the year ended December 31, 2022.

Allowance for Credit Losses

The allowance for credit losses is a valuation account which represents management’s best estimate of lifetime expected losses based on reasonable and supportable forecasts, historical loss experience, and other qualitative considerations. The Company bases its estimates of credit losses on three primary components: (1) estimates of expected losses that exist in various segments of performing loans over the remaining life of the loan portfolio using a reasonable and supportable economic forecast, (2) specifically identified losses in individually analyzed credits which are collateral-dependent, which generally include loans internally graded as impaired and purchased credit deteriorated (“PCD”) loans and (3) qualitative factors related to economic conditions, portfolio concentrations, regulatory policy updates, and other relevant factors that address estimates of expected losses not fully addressed based upon management’s judgment of portfolio conditions. One of the most significant judgments used in determining the allowance for credit losses is the reasonable and supportable economic forecast. Estimating the timing and amounts of future losses is subject to significant management judgment as these projected cash flows rely upon the estimates discussed above and factors that are reflective of current or future expected conditions. The processes we use to estimate expected credit losses, calculate our allowance for credit losses and measure the fair value of financial instruments, as well as the processes used to estimate the effects of changing interest rates and other measures of our financial condition and results of operations, depend upon the use of analytical and forecasting models and tools. These models and tools reflect assumptions made by management. Volatility in certain credit metrics and differences between expected and actual outcomes are to be expected. Customers may not repay their loans according to the original terms, and the collateral securing the payment of those loans may be insufficient to pay any remaining loan balance.

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The allowance for credit losses includes the allowance for credit losses on loans, which is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on loans, and the allowance for credit losses on unfunded commitments reported in other liabilities. The amount of the allowance for credit losses is affected by the following: (1) charge-offs of loans that decrease the allowance, (2) subsequent recoveries on loans previously charged off that increase the allowance and (3) provisions for (or reversal of) credit losses charged to income that increase or decrease the allowance. Management considers the policies related to the allowance for credit losses as the most critical to the financial statement presentation. The total allowance for credit losses includes activity related to allowances calculated in accordance with Accounting Standards Codification (“ASC”) 326 – Measurement of Credit Losses on Financial Instruments.

In addition, various regulatory agencies, as an integral part of the examination process, periodically review the allowance for credit losses. Such agencies may require the Bank to recognize adjustments to the allowance based on their judgments of the information available to them at the time of their examination.

The allowance for credit losses could be affected by significant downturns in circumstances relating to loan quality and economic conditions and as such may not be sufficient to cover expected losses in the loan portfolio which could necessitate additional provisions or a reduction in the allowance for credit losses if our assumption prove to be incorrect. Unanticipated changes and events could have a significant impact on the financial performance of borrowers and their ability to perform as agreed. We may experience significant credit losses if borrowers experience financial difficulties, which could have a material adverse effect on our operating results.

The provision for credit losses for the three and nine months ended September 30, 2023 and 2022, primarily resulted from considerations of a less favorable outlook in the current and forecasted macroeconomic variables such as interest rates, GDP and unemployment as a result of the potential slowdown of economic activity impacted by the policies of the Board of Governors of the Federal Reserve System, among other factors.

Fair value of loans acquired in a business combination

In conjunction with the Merger, the Company recorded $273.6 million of goodwill, based on the fair value of acquired assets and liabilities of CBTX. The fair value often involved third-party estimates utilizing input assumptions by management which may be complex or uncertain. The fair value of acquired loans is based on a discounted cash flow methodology that considers factors such as type of loan and related collateral, and requires management’s judgement on estimates about discount rates, expected future cash flows, market conditions and other future events.

For purchased financial loans with credit deterioration, PCD loans, an estimate of expected credit losses was made for loans with similar risk characteristics and was added to the purchase price to establish the initial amortized cost basis of the PCD loans. Any difference between the unpaid principal balance and the amortized cost basis is considered to relate to noncredit factors and results in a discount or premium. Discounts and premiums are recognized through interest income on a level-yield method over the life of the loans. For acquired loans not deemed PCD at acquisition, the differences between the initial fair value and the unpaid principal balance are recognized as interest income on a level-yield basis over the lives of the related loans.

Management relied on economic forecasts, internal valuations, or other relevant factors which were available at the time of the Merger in the determination of the assumptions used to calculate the fair value of the acquired loans. The estimates about discount rates, expected future cash flows, market conditions and other future events are subjective and may differ from estimates. The estimate of fair values on acquired loans contributed to the recorded goodwill from the Merger. In future income statement periods, interest income on loans will include the amortization and accretion of any premiums and discounts resulting from the fair value of acquired loans. Additionally, the provision for credit losses on acquired individually analyzed PCD loans may be impacted due to changes in the assumptions used to calculated expected cash flows.

Merger

The acquisition method of accounting requires that assets acquired and liabilities assumed in business combinations are recorded at their fair values. This often involves estimates based on third-party or internal valuations based on discounted cash flow analyses or other valuation techniques, which are inherently subjective. Business combinations also typically result in goodwill, which is subject to ongoing periodic impairment tests based on the fair values of the reporting units to which the goodwill relates. The amortization of intangible assets with definite useful lives is based upon the estimated economic benefits to be received, which is also subjective. Provisional estimates of fair values may be adjusted for a period of up to one year from the acquisition date if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the

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measurement of the amounts recognized as of that date. Adjustments recorded during this period are recognized in the current reporting period.

Management uses various valuation methodologies to estimate the fair value of these assets and liabilities, and often involves a significant degree of judgment, particularly when liquid markets do not exist for the particular item being valued. Examples of such items include loans, deposits, identifiable intangible assets and certain other assets and liabilities. Management uses significant estimates and assumptions to value such items, including projected cash flows, repayment rates, default rates and losses assuming default, discount rates, and realizable collateral values. The allowance for credit losses on PCD loans is recognized within business combination accounting. The allowance for credit losses for non-purchased credit deteriorated (“non-PCD”) assets is recognized as provision expense in the same reporting period as the business combination. The valuation of other identifiable intangible assets, including core deposit intangibles and other intangibles, requires assumptions such as projected attrition rates, expected revenue and costs, discount rates and other forward-looking factors. The purchase date valuations and any subsequent adjustments also determine the amount of goodwill recognized in connection with the business combination. Our estimates of the fair value of assets acquired and liabilities assumed are based upon assumptions that we believe to be reasonable, and whenever necessary, include assistance from independent third-party appraisal and valuation firms.

Goodwill

Goodwill represents the excess of the consideration paid over the fair value of the net assets acquired in a business

combination. During the measurement period, the Company may record subsequent adjustments to goodwill for provisional amounts recorded at the acquisition date. During the third quarter of 2023, the Company completed the final tax returns related to CBTX's business and operations through September 30, 2022. After completion of these tax returns, the Company increased income tax balances and goodwill in the amount of $58 thousand which finalized all purchase accounting adjustments for the Merger.

Goodwill is subject to impairment testing, which must be conducted at least annually or upon the occurrence of a triggering event. Goodwill is recorded and evaluated for impairment at its reporting unit, the Company. The Company's policy is to test goodwill for impairment annually as of October 1st, or on an interim basis if an event triggering an impairment assessment is determined to have occurred. Various factors, such as the Company’s results of operations, the trading price of the Company’s common stock relative to the book value per share, macroeconomic conditions and conditions in the banking sector, inform whether a triggering event for an interim goodwill impairment test has occurred. The impairment test compares the estimated fair value of each reporting unit with its net book value. If the unit’s fair value is less than its carrying value, an estimate of the implied fair value of the goodwill is compared to the goodwill’s carrying value and any impairment recognized.

During the nine months ended September 30, 2023, economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering event requiring an interim goodwill impairment quantitative analysis for third quarter 2023. The Company engaged an independent third-party service provider to assist management with the determination of the fair value of the Company as of September 30, 2023. A combination of a risk-weighted income valuation methodology, comprising a discounted cash flow analysis and a market valuation methodology, comprising the guideline public company method, was employed.

In performing the discount cash flow analysis, the Company utilized multi-year cash projections that rely on internal forecasts of loan and deposit growth, bond mix, financing composition, market pricing of securities, credit performance, forward interest rates, future returns driven by net interest margin, fee generation and expense incurrence, industry and economic trends, and other relevant considerations.

The discount rate was calculated as the cost of equity capital using the modified capital asset pricing model, which includes variables including the risk-free interest rate, beta, equity risk premium, size premium, and company-specific risk premium.

The market approach considers a combination of price to book value and price to earnings, adjusted based on companies similar to the reporting unit and adjusted for selected multiples, along with a control premium based on a review of transactions in the banking industry in order to calculate the indicated value of the Company's equity on a control, marketable basis. The analysis resulted in the Company's fair value exceeding its carrying value resulting in no impairment charge for the period.

Significant judgment is necessary in the determination of the fair value of a reporting unit. Future events could cause the Company to conclude that the Company’s goodwill has become impaired, which would result in recording an impairment loss. Any resulting impairment loss could have a material adverse impact on the Company’s financial condition and results of operations. Management will continue evaluating the economic conditions at future reporting periods for triggering events.

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See Note 3 – Goodwill and Other Intangible Assets to the consolidated financial statements for additional information on the Company’s goodwill balances and Note 2 – Acquisitions to the consolidated financial statements for goodwill and intangibles recorded in related to the Merger.

Recently Issued Accounting Pronouncements

We have evaluated new accounting pronouncements that have recently been issued. Refer to Note 1 of the Company’s consolidated financial statements for a discussion of recent accounting pronouncements that have been adopted by the Company or that will require enhanced disclosures in the Company’s financial statements in future periods.

Results of Operations

Net income was $30.9 million, or $0.58 per diluted share, for the third quarter 2023 compared to $14.3 million, or $0.50 per diluted share, for the third quarter 2022. The increase in net income was primarily due to a $46.0 million increase in net interest income and a $1.7 million increase in noninterest income, partially offset by a $26.7 million increase in noninterest expense and a $4.0 million increase in the provision for income taxes, all primarily resulting from the Merger. Acquisition and merger-related expenses totaled $3.4 million for the third quarter of 2023 compared $10.6 million for the third quarter of 2022.

Annualized returns on average assets, returns on average equity and efficiency ratios were 1.14%, 8.34% and 63.50%, for the three months ended September 30, 2023, compared to 0.84%, 7.90% and 69.18%, for the three months ended September 30, 2022. The efficiency ratio is calculated by dividing total noninterest expense by the sum of net interest income plus noninterest income, excluding net gains and losses on the sale of loans, securities and assets. Additionally, taxes and provision for loan losses are not part of the efficiency ratio calculation.

Net income was $103.2 million, or $1.94 per diluted share, for the nine months ended September 30, 2023 compared to $49.4 million, or $1.71 per diluted share, for the nine months ended September 30, 2022. The increase in net income was primarily due to a $157.5 million increase in net interest income and a $8.0 million increase in noninterest income, partially offset by a $96.1 million increase in noninterest expense, a $2.0 million increase in the provision for credit losses and a $13.5 million increase in the provision for income taxes, all primarily resulting from the Merger. Acquisition and merger-related expenses totaled $12.5 million for the nine months ended September 30, 2023 compared to $12.7 million for the nine months ended September 30, 2022.

Annualized returns on average assets, returns on average equity and efficiency ratios were 1.28%, 9.52% and 61.02%, for the nine months ended September 30, 2023, compared to 0.94%, 8.74% and 63.62%, for the nine months ended September 30, 2022.

Net Interest Income

Three months ended September 30, 2023 compared with three months ended September 30, 2022. Net interest income before the provision for credit losses for the three months ended September 30, 2023 was $106.7 million compared with $60.7 million for the three months ended September 30, 2022, an increase of $46.0 million, or 75.8%, primarily due to the increase in average interest-earning assets and interest-bearing liabilities as a result of the Merger.

Interest income was $151.3 million for the three months ended September 30, 2023, an increase of $83.4 million, or 122.8%, compared with $67.9 million for the three months ended September 30, 2022, primarily due to the Merger as average interest-earning assets balances increased along with increased rates, higher-yielding loans and purchase accounting adjustments. Average interest-earning assets increased $3.37 billion, or 53.3%, for the three months ended September 30, 2023 compared with the three months ended September 30, 2022, primarily due to the increase in loans as a result of the Merger. Average loans to average interest earning assets increased to 82.9% for the three months ended September 30, 2023 compared to 70.4% for the same period in the prior year. Additionally, interest income from purchase accounting adjustments was $12.4 million for the three months ended September 30, 2023.

Interest expense was $44.5 million for the three months ended September 30, 2023, an increase of $37.4 million, or 519.4%, compared with $7.2 million for the three months ended September 30, 2022. This increase was primarily due to higher funding costs on interest-bearing deposits due to higher interest rates and an increase in average interest-bearing liabilities. The cost of average interest-bearing liabilities increased to 3.22% for the three months ended September 30, 2023 compared to 0.81% for the same period in 2022. Average interest-bearing liabilities increased $1.95 billion for the three months ended September 30, 2023 compared to the three months ended September 30, 2022, primarily due to the Merger.

Tax equivalent net interest margin, defined as net interest income adjusted for tax-free income divided by average interest-earning assets, for the three months ended September 30, 2023 was 4.37%, an increase of 52 basis points compared to 3.85% for the three months ended September 30, 2022. The increase in the net interest margin on a tax equivalent basis was primarily due to the

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Merger and an increase in the average yield on interest-earning assets partially offset by increased funding costs. The average yield on interest-earning assets of 6.19% and the average rate paid on interest-bearing liabilities of 3.22% for the third quarter of 2023 increased by 193 basis points and 241 basis points, respectively, over the same period in 2022. Tax equivalent adjustments to net interest margin are the result of increasing income from tax-free securities and loans by an amount equal to the taxes that would have been paid if the income were fully taxable based on a 21% federal tax rate for the three months ended September 30, 2023 and 2022, thus making tax-exempt yields comparable to taxable asset yields.

The following table presents, for the periods indicated, the total dollar amount of average balances, interest income from average interest-earning assets and the annualized resultant yields, as well as the interest expense on average interest-bearing liabilities, expressed in both dollars and rates. Any nonaccruing loans have been included in the table as loans carrying a zero yield.

	Three Months Ended September 30,
	2023						2022
	Average Balance		Interest Earned/ Interest Paid		Average Yield/ Rate		Average Balance		Interest Earned/ Interest Paid		Average Yield/ Rate
	(Dollars in thousands)
Assets
Interest-earning Assets:
Loans	$	8,043,706	$	138,948	6.85	%	$	4,456,174	$	58,025	5.17	%
Securities	1,471,916		9,930		2.68	%	1,709,470		9,249		2.15	%
Deposits in other financial institutions	181,931		2,391		5.21	%	160,340		608		1.50	%
Total interest-earning assets	9,697,553		$	151,269	6.19	%	6,325,984		$	67,882	4.26	%
Allowance for credit losses on loans	(99,892)						(50,609)
Noninterest-earning assets	1,143,634						442,511
Total assets	$	10,741,295					$	6,717,886
Liabilities and Shareholders' Equity
Interest-bearing Liabilities:
Interest-bearing demand deposits	$	1,400,508	$	10,415	2.95	%	$	978,531	$	2,380	0.96	%
Money market and savings deposits	2,166,610		13,142		2.41	%	1,500,083		1,147		0.30	%
Certificates and other time deposits	1,400,367		13,282		3.76	%	877,231		1,664		0.75	%
Borrowed funds	411,212		5,801		5.60	%	68,752		499		2.88	%
Subordinated debt	109,608		1,908		6.91	%	109,177		1,502		5.46	%
Total interest-bearing liabilities	5,488,305		$	44,548	3.22	%	3,533,774		$	7,192	0.81	%
Noninterest-Bearing Liabilities:
Noninterest-bearing demand deposits	3,695,592						2,424,884
Other liabilities	86,389						41,792
Total liabilities	9,270,286						6,000,450
Shareholders' equity	1,471,009						717,436
Total liabilities and shareholders' equity	$	10,741,295					$	6,717,886
Net interest rate spread					2.97	%					3.45	%
Net interest income and margin(1)			$	106,721	4.37	%			$	60,690	3.81	%
Net interest income and margin (tax equivalent)(2)			$	106,919	4.37	%			$	61,418	3.85	%
Cost of funds					1.92	%					0.48	%
Cost of deposits					1.69	%					0.36	%

(1)The net interest margin is equal to annualized net interest income divided by average interest-earning assets.

(2)Tax-equivalent adjustments have been computed using a federal income tax rate of 21% for the three months ended September 30, 2023 and 2022.

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Nine months ended September 30, 2023 compared with nine months ended September 30, 2022. Net interest income before the provision for credit losses for the nine months ended September 30, 2023 was $330.8 million, compared with $173.3 million for the nine months ended September 30, 2022, an increase of $157.5 million, or 90.9%, primarily due to the increase in average interest-earning assets and interest-bearing liabilities as a result of the Merger.

Interest income was $438.6 million for the nine months ended September 30, 2023, an increase of $247.6 million, or 129.6%, compared with $191.0 million for the nine months ended September 30, 2022, primarily due to the Merger as average interest-earning assets balances increased along with increased rates and an increase in higher-yielding loans. Average interest-earning assets increased $3.13 billion, or 47.4%, for the nine months ended September 30, 2023 compared with the nine months ended September 30, 2022, primarily due to the Merger. Average loans to average interest earning assets increased to 81.7% for the nine months ended September 30, 2023 compared to 65.6% for the same period in the prior year. Additionally, interest income from purchase accounting adjustments was $35.1 million for the nine months ended September 30, 2023.

Interest expense was $107.8 million for the nine months ended September 30, 2023, an increase of $90.1 million, or 509.8%, compared with $17.7 million for the nine months ended September 30, 2022. This increase was primarily due to higher funding costs on interest-bearing deposits due to higher interest rates and an increase in average interest-bearing liabilities. The cost of average interest-bearing liabilities increased to 268 basis points for the nine months ended September 30, 2023 compared to 62 basis points for the same period in 2022. Average interest-bearing liabilities increased $1.55 billion, or 40.5%, for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022 primarily due to the Merger.

Tax equivalent net interest margin, defined as net interest income adjusted for tax-free income divided by average interest-earning assets, for the nine months ended September 30, 2023 was 4.55%, an increase of 100 basis points compared to 3.55% for the nine months ended September 30, 2022. The increase in the net interest margin on a tax equivalent basis was primarily due to the Merger and an increase in the average yield on interest-earning assets partially offset by increased funding costs. The average yield on interest-earning assets of 6.02% and the average rate paid on interest-bearing liabilities of 2.68% for the nine months ended September 30, 2023 increased by 215 basis points and 206 basis points, respectively, over the same period in 2022. Tax equivalent adjustments to net interest margin are the result of increasing income from tax-free securities and loans by an amount equal to the taxes that would have been paid if the income were fully taxable based on a 21% federal tax rate for the nine months ended September 30, 2023 and 2022, thus making tax-exempt yields comparable to taxable asset yields.

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The following table presents, for the periods indicated, the total dollar amount of average balances, interest income from average interest-earning assets and the annualized resultant yields, as well as the interest expense on average interest-bearing liabilities, expressed in both dollars and rates. Any nonaccruing loans have been included in the table as loans carrying a zero yield.

	Nine Months Ended September 30,
	2023						2022
	Average Balance		Interest Earned/ Interest Paid		Average Yield/ Rate		Average Balance		Interest Earned/ Interest Paid		Average Yield/ Rate
	(Dollars in thousands)
Assets
Loans	$	7,957,911	$	398,608	6.70	%	$	4,331,288	$	164,230	5.07	%
Securities	1,525,808		31,007		2.72	%	1,774,149		24,970		1.88	%
Deposits in other financial institutions	251,475		9,027		4.80	%	498,456		1,825		0.49	%
Total interest-earning assets	9,735,194		$	438,642	6.02	%	6,603,893		$	191,025	3.87	%
Allowance for credit losses on loans	(96,570)						(49,422)
Noninterest-earning assets	1,148,847						441,767
Total assets	$	10,787,471					$	6,996,238
Liabilities and Shareholders' Equity
Interest-bearing Liabilities:
Interest-bearing demand deposits	$	1,478,547	$	28,141	2.54	%	$	1,031,006	$	3,856	0.50	%
Money market and savings deposits	2,291,588		34,161		1.99	%	1,549,969		2,877		0.25	%
Certificates and other time deposits	1,164,572		26,211		3.01	%	1,069,011		5,742		0.72	%
Borrowed funds	333,220		13,653		5.48	%	69,492		799		1.54	%
Subordinated debt	109,508		5,647		6.89	%	109,046		4,407		5.40	%
Total interest-bearing liabilities	5,377,435		$	107,813	2.68	%	3,828,524		$	17,681	0.62	%
Noninterest-Bearing Liabilities:
Noninterest-bearing demand deposits	3,878,760						2,373,489
Other liabilities	81,894						39,123
Total liabilities	9,338,089						6,241,136
Shareholders' equity	1,449,382						755,102
Total liabilities and shareholders' equity	$	10,787,471					$	6,996,238
Net interest rate spread					3.34	%					3.25	%
Net interest income and margin(1)			$	330,829	4.54	%			$	173,344	3.51	%
Net interest income and margin (tax equivalent)(2)			$	331,549	4.55	%			$	175,578	3.55	%
Cost of funds					1.56	%					0.38	%
Cost of deposits					1.34	%					0.28	%

(1)The net interest margin is equal to annualized net interest income divided by average interest-earning assets.

(2)Tax-equivalent adjustments have been computed using a federal income tax rate of 21% for the nine months ended September 30, 2023 and 2022.

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The following table presents information regarding the dollar amount of changes in interest income and interest expense for the periods indicated for each major component of interest-earnings assets and interest-bearing liabilities and distinguishes between the changes attributable to changes in volume and changes in interest rates. For purposes of this table, changes attributable to both rate and volume that cannot be segregated have been allocated to rate.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023 vs. 2022						2023 vs. 2022
	Increase (Decrease) Due to Change in						Increase (Decrease) Due to Change in
	Volume		Rate		Total		Volume		Rate		Total
	(In thousands)
Interest-earning Assets:
Loans	$	46,750	$	34,173	$	80,923	$	137,664	$	96,714	$	234,378
Securities	(1,287)		1,968		681		(3,492)		9,529		6,037
Deposits in other financial institutions	82		1,701		1,783		(905)		8,107		7,202
Total increase in interest income	45,545		37,842		83,387		133,267		114,350		247,617
Interest-bearing Liabilities:
Interest-bearing demand deposits	1,021		7,014		8,035		1,674		22,611		24,285
Money market and savings deposits	504		11,491		11,995		1,387		29,897		31,284
Certificates and other time deposits	989		10,629		11,618		515		19,954		20,469
Borrowed funds	2,486		2,816		5,302		3,038		9,816		12,854
Subordinated debt	6		400		406		19		1,221		1,240
Total increase in interest expense	5,006		32,350		37,356		6,633		83,499		90,132
Increase in net interest income	$	40,539	$	5,492	$	46,031	$	126,634	$	30,851	$	157,485

Provision for Credit Losses

Our allowance for credit losses is established through charges to income in the form of the provision in order to bring our allowance for credit losses for various types of financial instruments including loans, unfunded commitments and securities to a level deemed appropriate by management. We recorded a provision for credit losses of $2.3 million and $2.0 million for the three months ended September 30, 2023 and 2022, respectively, and a $7.9 million and $5.9 million provision for credit losses for the nine months ended September 30, 2023 and 2022, respectively. The provision for credit losses for the three and nine months ended September 30, 2023 and 2022, primarily resulted from considerations of a less favorable outlook in the current and forecasted macroeconomic variables such as interest rates, GDP and unemployment as a result of the potential slowdown of economic activity by the FED's tightening policy to control inflation, among other things.

We recorded net charge-offs of $8.1 million for the three months ended September 30, 2023 compared to net recoveries of $245 thousand during the three months ended September 30, 2022. Net charge-offs of $8.5 million were recorded for the nine months ended September 30, 2023 compared to net charge-offs of $643 thousand for the nine months ended September 30, 2022. The increase in charge-offs during 2023 was primarily due to a single commercial and industrial loan relationship that was placed on nonaccrual status at December 31, 2022 and had an allowance for credit losses of $5.1 million at June 30, 2023. During the third quarter 2023, the borrower’s financial condition further deteriorated, which prompted the charge-off of $8.0 million on the loan relationship.

Noninterest Income

Our primary sources of noninterest income are debit card and ATM income, service charges on deposit accounts, income earned on bank-owned life insurance and nonsufficient funds ("NSF") and overdraft charges. Noninterest income does not include loan origination fees which are recognized over the life of the related loan as an adjustment to yield using the interest method.

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Three months ended September 30, 2023 compared with three months ended September 30, 2022. Noninterest income totaled $4.7 million for the three months ended September 30, 2023 compared with $3.0 million for the same period in 2022, an increase of $1.7 million, or 56.8%, primarily due to increased debt card and ATM income and service charges due to increased scale as a result of the Merger partially offset by the impact of the Durbin Amendment of the Dodd-Frank Wall Street Reform and Consumer Protection Act ("Durbin Amendment") along with a decision made by the Company to no longer charge NSF fees.

Nine months ended September 30, 2023 compared with nine months ended September 30, 2022. Noninterest income totaled $17.7 million for the nine months ended September 30, 2023 compared with $9.7 million for the same period in 2022, an increase of $8.0 million, or 81.9%, primarily due to increased debt card and ATM income and service charges due to increased scale as a result of the Merger partially offset by the impact of the Durbin Amendment along with a decision made by the Company to no longer charge NSF fees.

The following table presents, for the periods indicated, the major categories of noninterest income:

	Three Months Ended September 30,				Increase (Decrease)		Nine Months Ended September 30,				Increase (Decrease)
	2023		2022				2023		2022
	(In thousands)
Nonsufficient funds and overdraft charges	$	291	$	145	$	146	$	1,115	$	387	$	728
Service charges on deposit accounts	1,329		527		802		3,429		1,614		1,815
Gain (loss) on sale of assets	—		42		(42)		192		25		167
Bank-owned life insurance income	551		135		416		1,605		610		995
Debit card and ATM income	935		869		66		4,454		2,568		1,886
Other(1)	1,589		1,277		312		6,881		4,513		2,368
Total noninterest income	$	4,695	$	2,995	$	1,700	$	17,676	$	9,717	$	7,959

(1)Other includes wire transfer and letter of credit fees, among other items.

Noninterest Expense

Three months ended September 30, 2023 compared with three months ended September 30, 2022. Noninterest expense was $70.7 million for the three months ended September 30, 2023 compared to $44.0 million for the three months ended September 30, 2022, an increase of $26.7 million, or 60.7%, primarily due to increased salaries and employee benefits, amortization of intangibles, data processing and software amortization, net occupancy and equipment and acquisition and merger-related costs.

Nine months ended September 30, 2023 compared with nine months ended September 30, 2022. Noninterest expense was $212.6 million for the nine months ended September 30, 2023 compared to $116.5 million for the nine months ended September 30, 2022, an increase of $96.1 million, or 82.5%, primarily due to increased salaries and employee benefits, amortization of intangibles, data processing and software amortization and net occupancy and equipment.

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The following table presents, for the periods indicated, the major categories of noninterest expense:

	Three Months Ended September 30,				Increase (Decrease)		Nine Months Ended September 30,				Increase (Decrease)
	2023		2022				2023		2022
	(In thousands)
Salaries and employee benefits(1)	$	39,495	$	22,013	$	17,482	$	116,570	$	66,605	$	49,965
Net occupancy and equipment	4,455		2,129		2,326		12,360		6,554		5,806
Depreciation	1,952		1,003		949		5,629		3,048		2,581
Data processing and software amortization	4,798		2,541		2,257		14,526		7,561		6,965
Professional fees	997		485		512		4,088		1,285		2,803
Regulatory assessments and FDIC insurance	1,814		1,134		680		5,863		3,651		2,212
Amortization of intangibles	6,876		750		6,126		20,636		2,252		18,384
Communications	663		359		304		2,053		1,063		990
Advertising	877		385		492		2,623		1,330		1,293
Acquisition and merger-related expenses	3,421		10,551		(7,130)		12,483		12,669		(186)
Other	5,400		2,681		2,719		15,722		10,434		5,288
Total noninterest expense	$	70,748	$	44,031	$	26,717	$	212,553	$	116,452	$	96,101

(1)Total salaries and employee benefits includes $2.8 million and $969 thousand for the three months ended September 30, 2023 and 2022 and $8.2 million and $2.9 million for the nine months ended September 30, 2023 and 2022, respectively, of stock based compensation expense.

Salaries and employee benefits. Salaries and benefits increased $17.5 million, or 79.4%, for the three months ended September 30, 2023 and $50.0 million, or 75.0% for the nine months ended September 30, 2023, compared to the same periods in 2022 primarily due to the Merger.

Acquisition and merger-related expenses. Acquisition and merger-related expenses of $3.4 million and $12.5 million incurred during the three and nine months ended September 30, 2023, respectively, were primarily related to compensation and legal and advisory fees associated with the Merger.

Amortization of intangibles. Amortization of intangibles increased $6.1 million for the three months ended September 30, 2023 and $18.4 million for the nine months ended September 30, 2023 compared to the same periods in 2022 due the $138.2 million core deposit intangible created as a result of the Merger.

Efficiency Ratio

The efficiency ratio is a supplemental financial measure utilized in management’s internal evaluation of our performance. We calculate our efficiency ratio by dividing total noninterest expense by the sum of net interest income and noninterest income, excluding net gains and losses on the sale of loans, securities and assets. Additionally, taxes and provision for credit losses are not part of this calculation. An increase in the efficiency ratio indicates that more resources are being utilized to generate the same volume of income, while a decrease would indicate a more efficient allocation of resources. Our efficiency ratio was 63.50% for the three months ended September 30, 2023 compared to 69.18% for the three months ended September 30, 2022 and 61.02% for the nine months ended September 30, 2023 compared to 63.62% for the nine months ended September 30, 2022, respectively.

We monitor the efficiency ratio in comparison with changes in our total assets and loans, and we believe that maintaining or reducing the efficiency ratio during periods of growth demonstrates the scalability of our operating platform. We expect to continue to benefit from our scalable platform in future periods as we continue to monitor overhead expenses necessary to support our growth.

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Income Taxes

The amount of federal and state income tax expense is influenced by the amount of pre-tax income, tax-exempt income and other nondeductible expenses. Income tax expense increased $4.0 million for the three months ended September 30, 2023 and $13.5 million for the nine months ended September 30, 2023 compared with the same periods in 2022 primarily due to the increase in pre-tax net income. Our effective tax rate was 19.4% and 19.3% for the three months ended September 30, 2023 and 2022 and 19.4% and 18.6% for the nine months ended September 30, 2023 and 2022, respectively.

Financial Condition

Loan Portfolio

At September 30, 2023, total loans were $8.00 billion, an increase of $249.8 million, or 3.2%, compared with December 31, 2022, primarily due to organic growth within our loan portfolio during the nine months ended September 30, 2023. Total loans as a percentage of deposits were 92.1% and 83.7% as of September 30, 2023 and December 31, 2022, respectively. Total loans as a percentage of assets were 75.1% and 71.1% as of September 30, 2023 and December 31, 2022, respectively.

The following table summarizes our loan portfolio by type of loan as of the dates indicated:

	September 30, 2023				December 31, 2022
	Amount		Percent		Amount		Percent
	(Dollars in thousands)
Commercial and industrial	$	1,474,600	18.4	%	$	1,455,795	18.8	%
Paycheck Protection Program (PPP)	5,968		0.1	%	13,226		0.2	%
Real estate:
Commercial real estate (including multi-family residential)	4,076,606		50.9	%	3,931,480		50.7	%
Commercial real estate construction and land development	1,078,265		13.5	%	1,037,678		13.4	%
1-4 family residential (including home equity)	1,024,945		12.8	%	1,000,956		12.9	%
Residential construction	289,553		3.6	%	268,150		3.4	%
Consumer and other	54,591		0.7	%	47,466		0.6	%
Total loans	8,004,528		100.0	%	7,754,751		100.0	%
Allowance for credit losses on loans	(93,575)				(93,180)
Loans, net	$	7,910,953			$	7,661,571

Our lending activities originate from the efforts of our bankers with an emphasis on lending to individuals, professionals, small- to medium-sized businesses and commercial companies generally located in our markets. Our strategy for credit risk management generally includes well-defined, centralized credit policies, uniform underwriting criteria and ongoing risk monitoring and review processes for credit exposures. The strategy generally emphasizes regular credit examinations and management reviews of loans. We have certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. We maintain an independent loan review department that reviews and validates the credit risk program on a periodic basis. In addition, an independent third-party loan review is performed on a periodic basis during the year. Results of these reviews are presented to management and the risk committee of the Board of Directors. The loan review process complements and reinforces the risk identification and assessment decisions made by bankers and credit personnel and contained in our policies and procedures.

The principal categories of our loan portfolio are discussed below:

Commercial and Industrial. We make commercial and industrial loans in our market area that are underwritten on the basis of the borrower’s ability to service the debt from income. In general, commercial loans involve more credit risk than residential mortgage loans and commercial mortgage loans and therefore typically yield a higher return. The increased risk in commercial loans derives from the expectation that commercial and industrial loans generally are serviced principally from the operations of the business, which may not be successful and from the type of collateral securing these loans. As a result, commercial and industrial loans require more extensive underwriting and servicing than other types of loans. Our commercial and industrial loan portfolio increased by $18.8 million, or 1.3%, to $1.47 billion as of September 30, 2023 from $1.46 billion as of December 31, 2022.

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Paycheck Protection Program (PPP). The balance of PPP loans decreased $7.3 million to $6.0 million as of September 30, 2023 from $13.2 million as of December 31, 2022 due to loan forgiveness.

Commercial Real Estate (Including Multi-Family Residential). We make loans collateralized by owner-occupied, nonowner-occupied and multi-family real estate to finance the purchase or ownership of real estate. As of September 30, 2023 and December 31, 2022, 46.4% and 45.3%, respectively, of our commercial real estate loans were owner-occupied. Our commercial real estate loan portfolio increased $145.1 million, or 3.7%, to $4.08 billion as of September 30, 2023 from $3.93 billion as of December 31, 2022, primarily as a result of organic loan growth. Included in our commercial real estate portfolio are multi-family residential loans. Our multi-family loans as of September 30, 2023 decreased to $453.3 million from $471.6 million as of December 31, 2022. We had 233 multi-family loans with an average loan size of $2.1 million as of September 30, 2023.

As of September 30, 2023, the Company’s commercial real estate (including multi-family residential) loan portfolio included $313.7 million of multifamily community development loans with associated tax credits, which fund Texas-based projects to promote affordable housing, compared to $287.3 million as of December 31, 2022.

Commercial Real Estate Construction and Land Development. We make commercial real estate construction and land development loans to fund commercial construction, land acquisition and real estate development construction. Construction loans involve additional risks as they often involve the disbursement of funds with the repayment dependent on the ultimate success of the project’s completion. Sources of repayment for these loans may be pre-committed permanent financing or sale of the developed property. The loans in this portfolio are monitored closely by management. Due to uncertainties inherent in estimating construction costs, the market value of the completed project and the effects of governmental regulation on real property, it can be difficult to accurately evaluate the total funds required to complete a project and the related loan to value ratio. As a result of these uncertainties, construction lending often includes the disbursement of substantial funds with repayment dependent, in part, on the success of the ultimate project rather than the ability of a borrower or guarantor to repay the loan. As of September 30, 2023 and December 31, 2022, 29.6% and 18.2%, respectively, of our commercial real estate construction and land development loans were owner-occupied. Commercial real estate construction and land development loans increased $40.6 million, or 3.9%, to $1.08 billion as of September 30, 2023 compared to $1.04 billion as of December 31, 2022.

As of September 30, 2023, the Company’s commercial real estate construction and land development portfolio included $157.3 million of construction and development loans to support multifamily community development loans with associated tax credits, which fund Texas-based projects to promote affordable housing, compared to $79.7 million as of December 31, 2022.

1-4 Family Residential (Including Home Equity). Our residential real estate loans include the origination of 1-4 family residential mortgage loans (including home equity and home improvement loans and home equity lines of credit) collateralized by owner-occupied residential properties located in our market areas. Our residential real estate portfolio (including home equity) increased $24.0 million, or 2.4%, to $1.02 billion as of September 30, 2023 from $1.00 billion as of December 31, 2022.

Residential Construction. We make residential construction loans to home builders and individuals to fund the construction of single-family residences with the understanding that such loans will be repaid from the proceeds of the sale of the homes by builders or with the proceeds of a mortgage loan. These loans are secured by the real property being built and are made based on our assessment of the value of the property on an as-completed basis. Our residential construction loans portfolio increased $21.4 million, or 8.0%, to $289.6 million as of September 30, 2023 from $268.2 million as of December 31, 2022.

Consumer and Other. Our consumer and other loan portfolio is made up of loans made to individuals for personal purposes and deferred fees and costs on all loan types. Generally, consumer loans entail greater risk than residential real estate loans because they may be unsecured or if secured the value of the collateral, such as an automobile or boat, may be more difficult to assess and more likely to decrease in value than real estate. In such cases, any repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment for the outstanding loan balance. The remaining deficiency often does not warrant further substantial collection efforts against the borrower beyond obtaining a deficiency judgment. In addition, consumer loan collections are dependent on the borrower’s continuing financial stability, and thus are more likely to be adversely affected by job loss, divorce, illness or personal bankruptcy. Furthermore, the application of various federal and state laws may limit the amount which can be recovered on such loans. Our consumer and other loan portfolio increased $7.1 million, or 15.0%, to $54.6 million as of September 30, 2023 from $47.5 million as of December 31, 2022.

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Asset Quality

We have procedures in place to assist us in maintaining the overall quality of our loan portfolio. We have established underwriting guidelines to be followed by our officers and monitor our delinquency levels for any negative or adverse trends.

Nonperforming Assets

Nonperforming assets totaled $38.3 million, or 0.48% of total assets, at September 30, 2023 compared to $45.0 million, or 0.41% of total assets, at December 31, 2022. The following table presents information regarding nonperforming assets as of the dates indicated.

	September 30, 2023			December 31, 2022
	(Dollars in thousands)
Nonaccrual loans:
Commercial and industrial	$	14,971		$	25,297
Paycheck Protection Program (PPP)	20			105
Real estate:
Commercial real estate (including multi-family residential)	13,563			9,970
Commercial real estate construction and land development	170			—
1-4 family residential (including home equity)	8,442			9,404
Residential construction	635			—
Consumer and other	490			272
Total nonaccrual loans	38,291			45,048
Accruing loans 90 or more days past due	—			—
Total nonperforming loans	38,291			45,048
Other real estate	—			—
Total nonperforming assets	$	38,291		$	45,048
Modified/restructured loans(1)	$	13,321		$	35,425
Nonperforming assets to total assets	0.36		%	0.41		%
Nonperforming loans to total loans	0.48		%	0.58		%

(1)On January 1, 2023, the Company adopted ASU 2022-02, which replaced the troubled debt restructuring classification with a modified loan classification that is assessed in a different manner. Modified/restructured loans represent the balance at the end of the respective period for those loans that are not already presented as a nonperforming loan.

Nonaccrual loans consisted of 111 separate credits at September 30, 2023 compared to 96 separate credits at December 31, 2022.

Allowance for Credit Losses

The allowance for credit losses is a valuation allowance that is established through charges to earnings in the form of a provision for (or reversal of) credit losses calculated in accordance with ASC 326, that is deducted from the amortized cost basis of certain assets to present the net amount expected to be collected. The amount of each allowance account represents management’s best estimate of current expected credit losses on these financial instruments considering available information, from internal and external sources, relevant to assessing exposure to credit loss over the contractual term of the instrument. Relevant available information includes historical credit loss experience, current conditions and reasonable and supportable forecasts. While historical credit loss experience provides the basis for the estimation of expected credit losses, adjustments to historical loss information may be made for differences in current portfolio-specific risk characteristics, environmental conditions or other relevant factors. While management utilizes its best judgment and information available, the ultimate adequacy of our allowance accounts is dependent upon a variety of factors beyond our control, including the performance of our portfolios, the economy, changes in interest rates and the view of the regulatory authorities toward classification of assets. For additional information regarding critical accounting estimates and policies, refer to “Critical Accounting Estimates” in this section, Note 1 – Nature of Operations and Significant Accounting and Reporting Policies and Note 5 – Loans and Allowance for Credit Losses in the accompanying notes to the consolidated financial statements.

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Allowance for Credit Losses on Loans

The allowance for credit losses on loans represents management’s estimates of current expected credit losses in the Company’s loan portfolio. Pools of loans with similar risk characteristics are collectively evaluated, while loans that no longer share risk characteristics with loan pools are evaluated individually.

At September 30, 2023, our allowance for credit losses on loans was $93.6 million, or 1.17% of total loans, compared with $93.2 million, or 1.20% of total loans, as of December 31, 2022. The increase in the allowance for credit losses on loans during the first nine months of 2023 primarily resulted from changes to the qualitative factors within the allowance for credit losses model, among other things. The following table presents, as of and for the periods indicated, an analysis of the allowance for loan losses and other related data:

	September 30,
	2023			2022
	(Dollars in thousands)
Average loans outstanding	$	7,957,911		$	4,331,288
Gross loans outstanding at end of period	8,004,528			4,591,912
Allowance for credit losses on loans at beginning of period	93,180			47,940
Provision for credit losses on loans	8,939			4,850
Charge-offs:
Commercial and industrial loans	(9,653)			(958)
Real estate:
Commercial real estate (including multi-family residential)	—			(383)
Commercial real estate construction and land development	—			(63)
1-4 family residential (including home equity)	(23)			—
Consumer and other	(45)			(65)
Total charge-offs for all loan types	(9,721)			(1,469)
Recoveries:
Commercial and industrial loans	1,124			720
Real estate:
Commercial real estate (including multi-family residential)	16			50
Commercial real estate construction and land development	—			55
1-4 family residential (including home equity)	9			—
Consumer and other	28			1
Total recoveries for all loan types	1,177			826
Net charge-offs	(8,544)			(643)
Allowance for credit losses on loans at end of period	$	93,575		$	52,147
Allowance for credit losses on loans to total loans	1.17		%	1.14		%
Net charge-offs to average loans(1)	0.14		%	0.02		%
Allowance for credit losses on loans to nonperforming loans	244.38		%	241.97		%

(1)Interim periods annualized.

Allowance for Credit Losses on Unfunded Commitments

The allowance for credit losses on unfunded commitments estimates current expected credit losses over the contractual period in which there is exposure to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by us. The allowance for credit losses on unfunded commitments is a liability account reported as a component of other liabilities in our consolidated balance sheets and is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on the commitments expected to fund. The estimate of commitments expected to fund is affected by historical analysis looking at utilization rates. The expected credit loss rates applied to the commitments expected to fund are affected by the general valuation allowance utilized for outstanding balances with the same

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underlying assumptions and drivers. At September 30, 2023, our allowance for credit losses on unfunded commitments was $10.9 million compared to $12.0 million at December 31, 2022.

Available for Sale Securities

We use our securities portfolio to provide a source of liquidity, to provide an appropriate return on funds invested, to manage interest rate risk and to meet pledging and regulatory capital requirements. As of September 30, 2023, the carrying amount of investment securities totaled $1.41 billion, a decrease of $392.6 million, or 21.7%, compared with $1.81 billion as of December 31, 2022. Securities represented 13.3% and 16.6% of total assets as of September 30, 2023 and December 31, 2022, respectively.

All of the securities in our securities portfolio are classified as available for sale. Securities classified as available for sale are measured at fair value in the financial statements with unrealized gains and losses reported, net of tax, as accumulated comprehensive income or loss until realized. Interest earned on securities is included in interest income. The following table summarizes the amortized cost and fair value of the securities in our securities portfolio as of the dates shown:

	September 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	409,152	$	129	$	(15,873)	$	393,408
Municipal securities	258,901		545		(40,330)		219,116
Agency mortgage-backed pass-through securities	378,573		22		(50,401)		328,194
Agency collateralized mortgage obligations	444,234		—		(78,356)		365,878
Corporate bonds and other	122,812		29		(14,485)		108,356
Total	$	1,613,672	$	725	$	(199,445)	$	1,414,952

	December 31, 2022
	Amortized  Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	433,417	$	90	$	(19,227)	$	414,280
Municipal securities	580,076		4,319		(43,826)		540,569
Agency mortgage-backed pass-through securities	370,471		362		(42,032)		328,801
Agency collateralized mortgage obligations	461,760		—		(67,630)		394,130
Corporate bonds and other	143,192		2		(13,388)		129,806
Total	$	1,988,916	$	4,773	$	(186,103)	$	1,807,586

Investment securities classified as available for sale or held to maturity are evaluated for expected credit losses under ASC Topic 326, “Financial Instruments – Credit Losses.” See Note 4 – Securities in the accompanying notes to the consolidated financial statements for additional information. Management does not have the intent to sell any of these securities and believes that it is more likely than not that the Company will not have to sell any such securities before a recovery of cost. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, as of September 30, 2023, management believes that the unrealized losses detailed in the previous table are due to noncredit-related factors, including changes in interest rates and other market conditions, and therefore, no losses have been recognized in the Company’s consolidated statements of income

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The following table summarizes the contractual maturity of securities and their weighted average yields as of the dates indicated. The contractual maturity of a mortgage-backed security is the date at which the last underlying mortgage matures. Available for sale securities are shown at amortized cost. For purposes of the table below, municipal securities are calculated on a tax equivalent basis.

	September 30, 2023
	Within One Year				After One Year but Within Five Years				After Five Years but Within Ten Years				After Ten Years				Total
	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Total		Yield
	(Dollars in thousands)
Available for Sale
U.S. government and agency securities	$	76,493	0.55	%	$	178,697	0.92	%	$	8,191	4.82	%	$	145,771	4.83	%	$	409,152	2.47	%
Municipal securities	—		0.00	%	3,821		4.46	%	70,471		2.82	%	184,609		2.79	%	258,901		2.81	%
Agency mortgage-backed pass-through securities	635		2.35	%	14,555		3.93	%	13,012		4.26	%	350,371		3.04	%	378,573		3.12	%
Agency collateralized mortgage obligations	—		0.00	%	17,230		2.80	%	7,916		2.68	%	419,088		1.55	%	444,234		1.62	%
Corporate bonds and other	1,070		7.37	%	3,000		6.20	%	62,963		5.17	%	55,779		2.94	%	122,812		5.07	%
Total	$	78,198	0.65	%	$	217,303	1.42	%	$	162,553	4.11	%	$	1,155,618	2.78	%	$	1,613,672	2.63	%

	December 31, 2022
	Within One Year				After One Year but Within Five Years				After Five Years but Within Ten Years				After Ten Years				Total
	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Total		Yield
	(Dollars in thousands)
Available for Sale
U.S. government and agency securities	$	76,438	0.54	%	$	173,380	0.92	%	$	16,081	4.96	%	$	167,518	4.92	%	$	433,417	2.55	%
Municipal securities	—		0.00	%	21,195		3.45	%	93,313		2.93	%	465,568		3.39	%	580,076		3.31	%
Agency mortgage-backed pass-through securities	1		3.21	%	14,112		4.02	%	11,201		4.53	%	345,157		2.94	%	370,471		3.03	%
Agency collateralized mortgage obligations	—		0.00	%	17,291		2.80	%	8,008		2.70	%	436,461		1.78	%	461,760		1.83	%
Corporate bonds and other	1,050		1.25	%	4,000		6.20	%	64,176		4.64	%	73,966		2.68	%	143,192		3.66	%
Total	$	77,489	0.55	%	$	229,978	1.58	%	$	192,779	3.75	%	$	1,488,670	2.95	%	$	1,988,916	2.78	%

The contractual maturity of mortgage-backed securities and collateralized mortgage obligations is not a reliable indicator of their expected life because borrowers may have the right to prepay their obligations. Mortgage-backed securities and collateralized mortgage obligations are typically issued with stated principal amounts and are backed by pools of mortgage loans with varying maturities. The term of the underlying mortgages and loans may vary significantly due to the ability of a borrower to prepay and, in particular, monthly pay downs on mortgage-backed securities tend to cause the average life of the securities to be much different than the stated contractual maturity. During a period of increasing interest rates, fixed rate mortgage-backed securities do not tend to experience heavy prepayments of principal and, consequently, the average life of this security will be lengthened. If interest rates begin to fall, prepayments may increase, thereby shortening the estimated life of this security.

As of September 30, 2023 and December 31, 2022, we did not own securities of any one issuer (other than the U.S. government and its agencies or sponsored entities) for which the aggregate adjusted cost exceeded 10% of our consolidated shareholders’ equity.

The average yield of our securities portfolio was 2.72% during the nine months ended September 30, 2023 compared with 1.88% for the nine months ended September 30, 2022. The increase in average yield during 2023 compared to the same period in 2022 was primarily due to the mix of higher-yielding securities within the portfolio.

Goodwill and Core Deposit Intangibles

Our goodwill was $497.3 million as of both September 30, 2023 and December 31, 2022. Goodwill resulting from business combinations represents the excess of the consideration paid over the fair value of the net assets acquired. Goodwill is assessed

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annually for impairment and on an interim basis if an event occurs or circumstances change that would indicate that the carrying amount of the asset may not be recoverable.

Our core deposit intangibles, net, as of September 30, 2023 was $122.9 million and $143.5 million as of December 31, 2022. Core deposit intangibles are amortized using the straight-line or an accelerated method over the estimated useful life of seven to ten years.

Deposits

Our lending and investing activities are primarily funded by deposits. We offer a variety of deposit accounts having a wide range of interest rates and terms including demand, savings, money market and certificates and other time accounts. We rely primarily on convenient locations, personalized service and our customer relationships to attract and retain these deposits. We seek customers that will engage in both a lending and deposit relationship with us.

Total deposits at September 30, 2023 were $8.69 billion, a decrease of $581.0 million, or 6.3%, compared with $9.27 billion at December 31, 2022 primarily driven by seasonality, industry-wide pressures and the maintenance of pricing discipline in an intensely competitive market for deposits. Noninterest-bearing deposits at September 30, 2023 were $3.66 billion, a decrease of $573.9 million, or 13.6%, compared with $4.23 billion at December 31, 2022. Interest-bearing deposits at September 30, 2023 were $5.03 billion, a decrease of $7.1 million, or 0.1%, compared with $5.04 billion at December 31, 2022. Estimated uninsured deposits totaled $4.73 billion and estimated uninsured deposits net of collateralized deposits of $865.7 million were $3.86 billion, or 44.5%, of total deposits at September 30, 2023.

The following table sets forth the amount of time deposits that met or exceeded the FDIC insurance limit of $250 thousand by time remaining until maturity:

	September 30, 2023
	(In thousands)
Three months or less	$	174,313
Over three months through six months	208,390
Over six months through 12 months	136,494
Over 12 months	40,987
Total	$	560,184

Borrowings

We have an available line of credit with the Federal Home Loan Bank ("FHLB") of Dallas, which allows us to borrow on a collateralized basis. FHLB advances are used to manage liquidity. The advances are secured by a blanket lien on certain loans. Maturing advances are replaced by drawing on available cash, making additional borrowings or through increased customer deposits. At September 30, 2023, we had a total borrowing capacity of $3.82 billion, of which $2.28 billion was available and $1.54 billion was outstanding in/through FHLB advances and letters of credit. There were $324.0 million of FHLB short-term advances outstanding at September 30, 2023 at a weighted-average rate of 5.62%. Letters of credit were $1.22 billion at September 30, 2023, of which $50.8 million will expire during the remaining months of 2023, $72.8 million will expire in 2024, $494.5 million will expire in 2025, $57.3 million will expire in 2026, $448.0 million will expire in 2027, $40.0 million will expire in 2028, $27.0 million will expire in 2029 and $30.0 million will expire in 2031.

Junior Subordinated Debentures

In connection with the acquisition of F&M Bancshares, Inc., the Company assumed Farmers & Merchants Capital Trust II and Farmers & Merchants Capital Trust III. Each of these trusts is a capital or statutory business trust organized for the sole purpose of issuing trust securities and investing the proceeds in the Company’s junior subordinated debentures. The preferred trust securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common securities of each trust are wholly owned by the Company. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of payment to all of the Company’s present and future senior indebtedness. The Company has fully and unconditionally guaranteed each trust’s obligations under the trust securities issued by such trust to the extent not paid or made by such trust, provided

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such trust has funds available for such obligations. The junior subordinated debentures are included in Tier 1 capital under current regulatory guidelines and interpretations. Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and common securities will also be deferred.

A summary of pertinent information related to the Company’s issues of junior subordinated debentures outstanding at September 30, 2023 is set forth in the table below:

Description	Issuance Date	Trust Preferred Securities Outstanding		Interest Rate	Junior Subordinated Debt Owed to Trusts		Maturity Date(1)
(Dollars in thousands)
Farmers & Merchants Capital Trust II	November 13, 2003	$	7,500	3-Month SOFR + 3.26%	$	7,732	November 8, 2033
Farmers & Merchants Capital Trust III	June 30, 2005	3,500		3-Month SOFR + 2.06%	3,609		July 7, 2035
					$	11,341

(1) All debentures are currently callable.

Subordinated Notes

In December 2017, the Bank completed the issuance, through a private placement, of $40.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Bank Notes") due December 15, 2027. As of December 15, 2022, the Bank Notes bore a floating rate of interest equal to 3-Month LIBOR plus 3.03%, which transitioned to 3-Month SOFR plus a comparable spread adjustment immediately after June 30, 2023, until the Bank Notes mature on December 15, 2027, or such earlier redemption date, payable quarterly in arrears. The Bank Notes are redeemable by the Bank, in whole or in part, on or after December 15, 2022 or, in whole but not in part, upon the occurrence of certain specified tax events, capital events or investment company events. Any redemption will be at a redemption price equal to 100% of the principal amount of Bank Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Bank Notes are not subject to redemption at the option of the holders. The Bank Notes are eligible for Tier 2 capital treatment, however, during the last five years of the instrument, the amount eligible must be reduced by 20% of the original amount annually and that no amount of the instrument is eligible for inclusion in Tier 2 capital when the remaining maturity of the instrument is less than one year. As the Bank Notes were within five years of maturity, only 80% of the notes are eligible for Tier 2 capital treatment at September 30, 2023.

In September 2019, the Company completed the issuance of $60.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Company Notes") due October 1, 2029. The Company Notes bear a fixed interest rate of 4.70% per annum until (but excluding) October 1, 2024, payable semi-annually in arrears on April 1 and October 1, commencing on April 1, 2020. Thereafter, from October 1, 2024 through the maturity date, October 1, 2029, or earlier redemption date, the Company Notes will bear interest at a floating rate equal to the then-current 3-Month SOFR, plus 3.13%, which transitioned from LIBOR immediately after June 30, 2023, for each quarterly interest period, payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year. Any redemption will be at a redemption price equal to 100% of the principal amount of Company Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Company Notes are not subject to redemption at the option of the holders.

Credit Agreement

On December 13, 2022, the Company entered into a loan agreement with another financial institution, or the Loan Agreement, that provides for a $75.0 million revolving line of credit. At September 30, 2023, there were no outstanding borrowings on this line of credit and the Company did not draw on this line of credit during 2023 or 2022. The Company can make draws on the line of credit for a period of 24 months, which began on December 13, 2022, after which the Company will not be permitted to make further draws. Interest accrues on outstanding borrowings at a per annum rate equal to the prime rate quoted by The Wall Street Journal and with a floor rate of 3.50% calculated in accordance with the terms of the revolving promissory note and payable quarterly through the first 24 months. The entire outstanding balance and unpaid interest is payable in full on December 13, 2024.

The Company may prepay the principal amount of the line of credit without premium or penalty. The obligations of the Company under the Loan Agreement are secured by a pledge of all the issued and outstanding shares of capital stock of Stellar Bank.

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Covenants made under the Loan Agreement include, among other things, while there any obligations outstanding under Loan Agreement, the Company shall maintain a cash flow to debt service (as defined in the Loan Agreement) of not less than 1.25, the Bank’s Texas Ratio (as defined in the Loan Agreement) not to exceed 25.0%, the Bank shall maintain a Tier 1 Leverage Ratio (as defined under the Loan Agreement) of at least 7.0% and restrictions on the ability of the Company and its subsidiaries to incur certain additional debt. As of September 30, 2023, we believe we were in compliance with all such debt covenants and had not been made aware of any noncompliance by the lender.

Off-Balance Sheet Items

In the normal course of business, we enter into various transactions, which, in accordance with accounting principles generally accepted in the United States, are not included in our consolidated balance sheets. We enter into these transactions to meet the financing needs of our customers. These transactions include commitments to extend credit and standby and commercial letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized in our consolidated balance sheets.

Commitments to Extend Credit. We enter into contractual commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Substantially all of our commitments to extend credit are contingent upon customers maintaining specific credit standards at the time of loan funding. We minimize our exposure to loss under these commitments by subjecting them to credit approval and monitoring procedures. The amount and type of collateral obtained, if considered necessary by us, upon extension of credit, is based on management’s credit evaluation of the customer. Management assesses the credit risk associated with certain commitments to extend credit in determining the level of the allowance for credit losses.

Standby Letters of Credit. Standby letters of credit are conditional commitments issued by us to guarantee the performance of a customer to a third party. If the customer does not perform in accordance with the terms of the agreement with the third party, we would be required to fund the commitment and we would have the rights to the underlying collateral. The maximum potential amount of future payments we could be required to make is represented by the contractual amount of the commitment. Our policies generally require that standby letter of credit arrangements contain security and debt covenants similar to those contained in loan agreements.

As of September 30, 2023 and December 31, 2022, we had outstanding $1.89 billion and $2.36 billion, respectively, in commitments to extend credit and $37.8 million and $35.5 million in commitments associated with outstanding letters of credit for those same periods. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the total outstanding may not necessarily reflect the actual future cash funding requirements.

Liquidity and Capital Resources

Liquidity

Liquidity is the measure of our ability to meet the cash flow requirements of depositors and borrowers, while at the same time meeting our operating, capital, strategic cash flow needs and to maintain reserve requirements to operate on an ongoing basis and manage unexpected events, all at a reasonable cost. During the nine months ended September 30, 2023 and the year ended December 31, 2022, our liquidity needs have been primarily met by deposits, borrowed funds, security and loan maturities and amortizing investment and loan portfolios. The Bank has access to purchased funds from correspondent banks, the Federal Reserve discount window and advances from the FHLB, on a collateralized basis, are available under a security and pledge agreement to take advantage of investment opportunities.

Liquidity risk management is an important element in our asset/liability management process. Our liquidity position is continuously monitored and adjustments are made to the balance between sources and uses of funds as deemed appropriate. 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 problematic by management. Liquidity stress scenarios are incorporated into our contingency funding plan, which provides the basis for the identification of our liquidity needs.

Our largest source of funds is deposits and our largest use of funds is loans. Average deposits increased $2.79 billion, or 46.3%, and average loans increased $3.63 billion, or 83.7%, for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Estimated uninsured deposits totaled $4.73 billion and our estimated uninsured deposits net of collateralized deposits of $865.7 million were $3.86 billion, or 44.5%, of total deposits at September 30, 2023. Our average deposit account size was $86 thousand at September 30, 2023. We predominantly invest excess deposits in Federal Reserve Bank of Dallas balances, securities, interest-bearing deposits at other banks or other short-term liquid investments until the funds are needed to fund

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loan growth. Our securities portfolio had a weighted average life of 7.5 years and 8.3 years at September 30, 2023 and December 31, 2022, respectively.

Total immediate contingent funding sources, including unrestricted cash, available-for-sale securities that are not pledged and total available borrowing capacity was $4.11 billion, or 47.3%, of total deposits at September 30, 2023. Including policy-driven capacity for brokered deposits, the Bank would have been able to add approximately $1.16 billion to its contingent sources of liquidity, bringing total contingent funding sources to approximately $5.27 billion, or 60.6%, of deposits at September 30, 2023.

As of September 30, 2023 and December 31, 2022, the Company had no exposure to future cash requirements associated with known uncertainties or capital expenditures of a material nature.

Capital Resources

Capital management consists of providing equity to support our current and future operations. We are subject to capital adequacy requirements imposed by the Federal Reserve, and the Bank is subject to capital adequacy requirements imposed by the FDIC. Both the Federal Reserve and the FDIC have adopted risk-based capital requirements for assessing bank holding company and bank capital adequacy. These standards define capital and establish minimum capital requirements in relation to assets and off-balance sheet exposure, adjusted for credit risk. The risk-based capital standards currently in effect are designed to make regulatory capital requirements more sensitive to differences in risk profiles among bank holding companies and banks, to account for off-balance sheet exposure and to minimize disincentives for holding liquid assets. Assets and off-balance sheet items are assigned to broad risk categories, each with appropriate relative risk weights. The resulting capital ratios represent capital as a percentage of total risk-weighted assets and off-balance sheet items.

Under current guidelines, the minimum ratio of total capital to risk-weighted assets (which are primarily the credit risk equivalents of balance sheet assets and certain off-balance sheet items such as standby letters of credit) is 8.0%. At least half of total capital must be composed of Tier 1 capital, which includes common shareholders’ equity (including retained earnings), less goodwill, other disallowed intangible assets, and disallowed deferred tax assets, among other items. The Federal Reserve also has adopted a minimum leverage ratio, requiring Tier 1 capital of at least 4.0% of average quarterly total consolidated assets, net of goodwill and certain other intangible assets, for all but the most highly rated bank holding companies. The federal banking agencies have also established risk-based and leverage capital guidelines that FDIC-insured depository institutions are required to meet. These regulations are generally similar to those established by the Federal Reserve for bank holding companies.

Under the Federal Deposit Insurance Act, the federal bank regulatory agencies must take “prompt corrective action” against undercapitalized U.S. depository institutions. U.S. depository institutions are assigned one of five capital categories: “well-capitalized,” “adequately capitalized,” “undercapitalized,” “significantly undercapitalized” and “critically undercapitalized,” and are subjected to different regulation corresponding to the capital category within which the institution falls. A depository institution is deemed to be “well-capitalized” if the banking institution has a total risk-based capital ratio of 10.0% or greater, a Tier 1 risk-based capital ratio of 8.0% or greater, a common equity Tier 1 capital ratio of 6.5% and a leverage ratio of 5.0% or greater, and the institution is not subject to an order, written agreement, capital directive or prompt corrective action directive to meet and maintain a specific level for any capital measure. Under certain circumstances, a well-capitalized, adequately capitalized or undercapitalized institution may be treated as if the institution were in the next lower capital category.

Failure to meet capital guidelines could subject the institution to a variety of enforcement remedies by federal bank regulatory agencies, including: termination of deposit insurance by the FDIC, restrictions on certain business activities and appointment of the FDIC as conservator or receiver.

As of September 30, 2023 and December 31, 2022, the Bank was well-capitalized. Total shareholders' equity was $1.46 billion at September 30, 2023 compared with $1.38 billion at December 31, 2022, an increase of $77.7 million. This increase was primarily due to net income of $103.2 million partially offset by the $0.39 per common share dividend paid for the nine months ended September 30, 2023.

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The following table provides a comparison of our leverage and risk-weighted capital ratios as of the dates indicated to the minimum and well-capitalized regulatory standards, as well as with the capital conservation buffer:

	Actual Ratio		Minimum Required For Capital Adequacy Purposes		Minimum Required Plus Capital Conservation Buffer		To Be Categorized As Well-Capitalized Under Prompt Corrective Action Provisions
Stellar Bancorp, Inc. (Consolidated)
September 30, 2023
Total Capital (to risk-weighted assets)	13.42	%	8.00	%	10.50	%	N/A
Common Equity Tier 1 capital (to risk-weighted assets)	11.14	%	4.50	%	7.00	%	N/A
Tier 1 Capital (to risk-weighted assets)	11.25	%	6.00	%	8.50	%	N/A
Tier 1 Leverage (to average tangible assets)	9.82	%	4.00	%	4.00	%	N/A
December 31, 2022
Total Capital (to risk-weighted assets)	12.39	%	8.00	%	10.50	%	N/A
Common Equity Tier 1 capital (to risk-weighted assets)	10.04	%	4.50	%	7.00	%	N/A
Tier 1 Capital (to risk-weighted assets)	10.15	%	6.00	%	8.50	%	N/A
Tier 1 Leverage (to average tangible assets)	8.55	%	4.00	%	4.00	%	N/A
Stellar Bank
September 30, 2023
Total Capital (to risk-weighted assets)	13.13	%	8.00	%	10.50	%	10.00	%
Common Equity Tier 1 capital (to risk-weighted assets)	11.63	%	4.50	%	7.00	%	6.50	%
Tier 1 Capital (to risk-weighted assets)	11.63	%	6.00	%	8.50	%	8.00	%
Tier 1 Leverage (to average tangible assets)	10.15	%	4.00	%	4.00	%	5.00	%
December 31, 2022
Total Capital (to risk-weighted assets)	12.02	%	8.00	%	10.50	%	10.00	%
Common Equity Tier 1 capital (to risk-weighted assets)	10.46	%	4.50	%	7.00	%	6.50	%
Tier 1 Capital (to risk-weighted assets)	10.46	%	6.00	%	8.50	%	8.00	%
Tier 1 Leverage (to average tangible assets)	8.81	%	4.00	%	4.00	%	5.00	%

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Asset/Liability Management and Interest Rate Risk

Our asset liability and interest rate risk policy provides management with the guidelines for effective balance sheet management. We have established a measurement system for monitoring our net interest rate sensitivity position. We manage our sensitivity position within our established guidelines.

As a financial institution, a component of the market risk that we face is interest rate volatility. Fluctuations in interest rates will ultimately impact both the level of income and expense recorded on most of our assets and liabilities, and the market value of all interest-earning assets and interest-bearing liabilities, other than those which have a short term to maturity. Interest rate risk is the potential for economic losses due to future interest rate changes. These economic losses can be reflected as a loss of future net interest income and/or a loss of current fair market values. The objective is to measure the effect on net interest income and to adjust the balance sheet to minimize the inherent risk while at the same time maximizing income.

Based upon the nature of our operations, we are not subject to foreign exchange rate or commodity price risk. We do not own any trading assets. We manage our exposure to interest rates by structuring our balance sheet in the ordinary course of a community banking business. The Company enters into interest rate swaps as an accommodation to customers.

Our exposure to interest rate risk is managed by the Balance Sheet Risk Committee of the Board (“BSRC”). The BSRC formulates strategies based on appropriate levels of interest rate risk. In determining the appropriate level of interest rate risk, the BSRC considers the impact on earnings and capital of the current outlook on interest rates, potential changes in interest rates, regional economies, liquidity, business strategies and other factors. The BSRC meets regularly to review, among other things, the sensitivity of assets and liabilities to interest rate changes, the book and market values of assets and liabilities, unrealized gains and losses, purchase and sale activities, commitments to originate loans and the maturities of investments and borrowings. Additionally, the BSRC reviews liquidity, cash flow flexibility, maturities of deposits and consumer and commercial deposit activity.

We use an interest rate risk simulation model and shock analysis to test the interest rate sensitivity of net interest income and the balance sheet, respectively. All instruments on the balance sheet are modeled at the instrument level, incorporating all relevant attributes such as next reset date, reset frequency and call dates, as well as prepayment assumptions for loans and securities and decay rates for nonmaturity deposits. Assumptions based on past experience are incorporated into the model for nonmaturity deposit account decay rates. The assumptions used are inherently uncertain and, as a result, the model cannot precisely measure future net interest income or precisely predict the impact of fluctuations in market interest rates on net interest income. Actual results will differ from the model’s simulated results due to timing, magnitude and frequency of interest rate changes as well as changes in market conditions and the application and timing of various management strategies.

We utilize static balance sheet rate shocks to estimate the potential impact on net interest income of changes in interest rates under various rate scenarios. This analysis estimates a percentage of change in the metric from the stable rate base scenario versus alternative scenarios of rising and falling market interest rates by instantaneously shocking a static balance sheet.

The following table summarizes the simulated change in net interest income over a 12-month horizon and the economic value of equity as of the dates indicated:

Change in Interest Rates (Basis Points)	Percent Change in Net Interest Income		Percent Change in Economic Value of Equity
	September 30, 2023	December 31, 2022	September 30, 2023	December 31, 2022
+300	(3.7)%	0.5%	(6.1)%	(2.9)%
+200	(2.7)%	0.5%	(3.5)%	(0.7)%
+100	(1.3)%	0.4%	(1.3)%	0.6%
Base	0.0%	0.0%	0.0%	0.0%
-100	0.5%	(2.0)%	(0.3)%	(3.2)%
-200	0.4%	(7.5)%	(3.5)%	(9.4)%

These results are primarily due to the size of our cash position, the size and duration of our loan and securities portfolio, the duration of our borrowings and the expected behavior of demand, money market and savings deposits during such rate fluctuations. During the nine months ended September 30, 2023, changes in our overall interest rate profile were driven by the decrease in noninterest bearing deposits and certain interest bearing deposits, increases in certificates of deposits and borrowed funds, an increase in loans and decreases in securities and cash and cash equivalents.

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LIBOR Transition

The Company’s transition away from LIBOR has been completed.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures. As of the end of the period covered by this Quarterly Report on Form 10-Q, the Company carried out an evaluation, under the supervision and with the participation of its management, including its Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of its disclosure controls and procedures. In designing and evaluating the disclosure controls and procedures, management recognizes that controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management was required to apply judgment in evaluating its controls and procedures. Based on this evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) were effective as of the end of the period covered by this Quarterly Report on Form 10-Q. See Exhibits 31.1 and 31.2 for the Certification statements issued by the Company’s Chief Executive Officer and Chief Financial Officer, respectively.

Changes in internal control over financial reporting. There were no changes in the Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter ended September 30, 2023 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we are subject to claims and litigation arising in the ordinary course of business. In the opinion of management, we are not party to any legal proceedings the resolution of which we believe would have a material adverse effect on our business, prospects, financial condition, liquidity, results of operation, cash flows or capital levels. However, one or more unfavorable outcomes in any claim or litigation against us could have a material adverse effect for the period in which such claim or litigation is resolved. In addition, regardless of their merits or their ultimate outcomes, such matters are costly, divert management’s attention and may materially adversely affect our reputation, even if resolved in our favor. We intend to defend ourselves vigorously against any future claims or litigation.

ITEM 1A. RISK FACTORS

Adverse developments affecting the financial services industry, such as recent bank failures or concerns involving liquidity, and the soundness of other financial institutions may have a material effect on the Company’s operations.

Recent events relating to the failures of certain banking entities in the first quarter of 2023, including Silicon Valley Bank, Signature Bank and First Republic Bank have caused significant volatility in the trading prices of stocks of publicly traded bank holding companies and general uncertainty and concern regarding the liquidity and financial strength of the banking sector as a whole. In the future, events such as these bank failures could have an adverse effect on our financial condition and results of operations and cause volatility in our stock price.

Financial services institutions are interrelated as a result of trading, clearing, counterparty, or other relationships. Stellar has exposure to many different industries and counterparties, and routinely executes transactions with counterparties in the financial services industry, including commercial banks, brokers and dealers, investment banks, and other institutional clients. Many of these transactions expose Stellar to credit risk and losses in the event of a default by a counterparty or client. Any such losses could have a material adverse effect on Stellar’s financial condition and results of operations.

In response to these failures and the resulting market reaction, the Secretary of the Treasury approved actions enabling the FDIC to complete its resolutions of the failed banks in a manner that fully protects depositors by utilizing the Deposit Insurance Fund, including the use of bridge banks to assume all of the deposit obligations of the failed banks, while leaving unsecured lenders and equity holders of such institutions exposed to losses. In addition, the Federal Reserve Bank announced it would make available additional funding to eligible depository institutions under a Bank Term Funding Program to help assure banks have the ability to meet the needs of all their depositors. In an effort to strengthen public confidence in the banking system and protect depositors, regulators announced that any losses to the Deposit Insurance Fund to support uninsured depositors will be recovered by a special

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assessment on banks, as required by law, which could increase the cost of our FDIC insurance assessments and may adversely affect our earnings. However, it is uncertain whether these steps by the government will be sufficient to calm the financial markets, reduce the risk of significant depositor withdrawals at other institutions and thereby reduce the risk of additional bank failures. As a result of this uncertainty, we face the potential for reputational risk, deposit outflows, increased costs and competition for liquidity, and increased credit risk which, individually or in the aggregate, could have a material adverse effect on our business, financial condition and results of operations.

There have been no material changes in the risk factors previously disclosed by the Company. Investors should carefully consider the risks described in “Part I—Item 1A.—Risk Factors” in the Company’s Annual Reports on Form 10-K for the year ended December 31, 2022 and the Company’s other SEC filings.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

In 2022, the Company’s Board of Directors authorized a share repurchase program, or the 2022 Repurchase Program, under which the Company may repurchase up to $40.0 million of the Company’s common stock starting September 22, 2022 through September 30, 2023. During the second quarter of 2023, the Company's Board of Directors authorized the expansion of its existing share repurchase program to provide that the Company may repurchase up to $60 million of the Company’s common stock through May 31, 2024.

Repurchases under the Company’s share repurchase program may be made from time to time at the Company’s discretion in open market transactions, through block trades, in privately negotiated transactions, and pursuant to any trading plan that may be adopted by the Company’s management in accordance with Rule 10b5-1 of the Exchange Act or otherwise. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements, market conditions, and other corporate liquidity requirements and priorities. The repurchase program does not obligate the Company to acquire a specific dollar amount or number of shares and may be modified, suspended or discontinued at any time.

There were no repurchases by the Company during the three months ended September 30, 2023. The number of shares that may be repurchased under the plan was 2,814,258, which was computed based on the closing share price of the Company's common stock as of September 30, 2023.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number	Description
3.1	Second Amended and Restated Certificate of Formation of Stellar Bancorp, Inc. (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on October 3, 2022)
3.2	Bylaws of Stellar Bancorp, Inc. (incorporated herein by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed on October 3, 2022)
31.1*	Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended
31.2*	Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended
32.1**	Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2**	Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document.
101.SCH*	Inline XBRL Taxonomy Extension Schema Document
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

*    Filed with this Quarterly Report on Form 10-Q.

**    Furnished with this Quarterly Report on Form 10-Q.

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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.

	Stellar Bancorp, Inc. (Registrant)
Date: November 3, 2023	/s/ Robert R. Franklin, Jr.
	Robert R. Franklin, Jr.
	Chief Executive Officer
Date: November 3, 2023	/s/ Paul P. Egge
	Paul P. Egge
	Chief Financial Officer

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EX-31.1

Exhibit 31.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER PURSUANT TO RULE 13a-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Robert R. Franklin, Jr., certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Stellar Bancorp, Inc.;

2.Based on my knowledge, this 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 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 officers 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(s) 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: November 3, 2023

/s/ Robert R. Franklin, Jr.

Robert R. Franklin, Jr.

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Paul P. Egge, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Stellar Bancorp, Inc.;

2.Based on my knowledge, this 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 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 officers 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(s) 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: November 3, 2023

/s/ Paul P. Egge

Paul P. Egge
Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 (AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002)

In connection with the Quarterly Report of Stellar Bancorp, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert R. Franklin, Jr., Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and operating results of the Company as of the dates and for the periods expressed in the Report.

IN WITNESS WHEREOF, the undersigned has executed this Certificate, effective as of November 3, 2023.

/s/ Robert R. Franklin, Jr.

Robert R. Franklin, Jr.

Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 (AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002)

In connection with the Quarterly Report of Stellar Bancorp, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Paul P. Egge, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and operating results of the Company as of the dates and for the periods expressed in the Report.

IN WITNESS WHEREOF, the undersigned has executed this Certificate, effective as of November 3, 2023.

/s/ Paul P. Egge

Paul P. Egge
Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Nov. 02, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-38280
Entity Registrant Name	Stellar Bancorp, Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	20-8339782
Entity Address, Address Line One	9 Greenway Plaza
Entity Address, Address Line Two	Suite 110
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77046
City Area Code	713
Local Phone Number	210-7600
Title of 12(b) Security	Common Stock, par value, $0.01 per share
Trading Symbol	STEL
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		53,262,213
Entity Central Index Key	0001473844
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks	$ 94,970	$ 67,063
Interest-bearing deposits at other financial institutions	207,302	304,642
Total cash and cash equivalents	302,272	371,705
Available for sale securities, at fair value	1,414,952	1,807,586
Loans held for investment	8,004,528	7,754,751
Less: allowance for credit losses on loans	(93,575)	(93,180)
Loans, net	7,910,953	7,661,571
Accrued interest receivable	43,536	44,743
Premises and equipment, net	119,332	126,803
Federal Home Loan Bank stock	29,022	15,058
Bank-owned life insurance	104,699	103,094
Goodwill	497,318	497,260
Core deposit intangibles, net	122,944	143,525
Other assets	120,432	129,092
TOTAL ASSETS	10,665,460	10,900,437
Deposits:
Noninterest-bearing	3,656,288	4,230,169
Interest-bearing
Demand	1,397,492	1,591,828
Money market and savings	2,128,950	2,575,923
Certificates and other time	1,503,891	869,712
Total interest-bearing deposits	5,030,333	5,037,463
Total deposits	8,686,621	9,267,632
Accrued interest payable	7,612	2,098
Borrowed funds	323,981	63,925
Subordinated debt	109,665	109,367
Other liabilities	76,735	74,239
Total liabilities	9,204,614	9,517,261
COMMITMENTS AND CONTINGENCIES (See Note 14)
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.01 par value; 10,000,000 shares authorized; no shares issued or outstanding at September 30, 2023 and December 31, 2022	0	0
Common stock, $0.01 par value; 140,000,000 shares authorized; 53,321,541 shares issued and outstanding at September 30, 2023 and 52,954,985 shares issued and outstanding at December 31, 2022	533	530
Capital surplus	1,231,686	1,222,761
Retained earnings	385,600	303,146
Accumulated other comprehensive loss	(156,973)	(143,261)
Total shareholders’ equity	1,460,846	1,383,176
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 10,665,460	$ 10,900,437

XML

CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	140,000,000	140,000,000
Common stock, shares issued (in shares)	53,321,541	52,954,985
Common stock, shares outstanding (in shares)	53,321,541	52,954,985

XML

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
INTEREST INCOME:
Loans, including fees	$ 138,948	$ 58,025	$ 398,608	$ 164,230
Securities:
Taxable	9,493	6,655	28,872	17,294
Tax-exempt	437	2,594	2,135	7,676
Deposits in other financial institutions	2,391	608	9,027	1,825
Total interest income	151,269	67,882	438,642	191,025
INTEREST EXPENSE:
Demand, money market and savings deposits	23,557	3,527	62,302	6,733
Certificates and other time deposits	13,282	1,664	26,211	5,742
Borrowed funds	5,801	499	13,653	799
Subordinated debt	1,908	1,502	5,647	4,407
Total interest expense	44,548	7,192	107,813	17,681
NET INTEREST INCOME	106,721	60,690	330,829	173,344
Provision for credit losses	2,315	1,962	7,896	5,919
Net interest income after provision for credit losses	104,406	58,728	322,933	167,425
NONINTEREST INCOME:
Gain on sale of assets	0	42	192	25
Bank-owned life insurance income	551	135	1,605	610
Debit card and ATM income	935	869	4,454	2,568
Other	1,589	1,277	6,881	4,513
Total noninterest income	4,695	2,995	17,676	9,717
NONINTEREST EXPENSE:
Salaries and employee benefits	39,495	22,013	116,570	66,605
Net occupancy and equipment	4,455	2,129	12,360	6,554
Depreciation	1,952	1,003	5,629	3,048
Data processing and software amortization	4,798	2,541	14,526	7,561
Professional fees	997	485	4,088	1,285
Regulatory assessments and FDIC insurance	1,814	1,134	5,863	3,651
Amortization of intangibles	6,876	750	20,636	2,252
Communications	663	359	2,053	1,063
Advertising	877	385	2,623	1,330
Acquisition and merger-related expenses	3,421	10,551	12,483	12,669
Other	5,400	2,681	15,722	10,434
Total noninterest expense	70,748	44,031	212,553	116,452
INCOME BEFORE INCOME TAXES	38,353	17,692	128,056	60,690
Provision for income taxes	7,445	3,406	24,825	11,310
NET INCOME	$ 30,908	$ 14,286	$ 103,231	$ 49,380
EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.58	$ 0.51	$ 1.94	$ 1.72
Diluted (in dollars per share)	0.58	0.50	1.94	1.71
DIVIDENDS PER SHARE (in dollars per share)	$ 0.13	$ 0.10	$ 0.39	$ 0.30
Nonsufficient funds and overdraft charges
NONINTEREST INCOME:
Revenue from contract with customer	$ 291	$ 145	$ 1,115	$ 387
Service charges on deposit accounts
NONINTEREST INCOME:
Revenue from contract with customer	$ 1,329	$ 527	$ 3,429	$ 1,614

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 30,908	$ 14,286	$ 103,231	$ 49,380
Unrealized loss on securities:
Change in unrealized holding loss on available for sale securities during the period	(31,638)	(60,618)	(17,390)	(229,887)
Reclassification of gain realized on securities	0	(42)	(234)	(25)
Total other comprehensive loss	(31,638)	(60,660)	(17,624)	(229,912)
Deferred tax benefit related to other comprehensive loss	6,669	12,739	3,912	48,282
Other comprehensive loss, net of tax	(24,969)	(47,921)	(13,712)	(181,630)
Comprehensive income (loss)	$ 5,939	$ (33,635)	$ 89,519	$ (132,250)

XML

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2021		28,845,903
Balance at Dec. 31, 2021	$ 816,468	$ 289	$ 530,845	$ 267,092	$ 18,242
Net income	49,380			49,380
Other comprehensive loss	(181,630)				(181,630)
Cash dividends declared	(8,497)			(8,497)
Common stock issued in connection with the exercise of stock options and restricted stock awards (in shares)		122,619
Common stock issued in connection with the exercise of stock options and restricted stock awards	1,328	$ 1	1,327
Repurchase of common stock (in shares)		(831,911)
Repurchase of common stock	(23,606)	$ (9)	(23,597)
Stock-based compensation expense	2,859		2,859
Balance (in shares) at Sep. 30, 2022		28,136,611
Balance at Sep. 30, 2022	656,302	$ 281	511,434	307,975	(163,388)
Balance (in shares) at Jun. 30, 2022		28,586,426
Balance at Jun. 30, 2022	705,329	$ 286	524,033	296,477	(115,467)
Net income	14,286			14,286
Other comprehensive loss	(47,921)				(47,921)
Cash dividends declared	(2,788)			(2,788)
Common stock issued in connection with the exercise of stock options and restricted stock awards (in shares)		31,823
Common stock issued in connection with the exercise of stock options and restricted stock awards	343		343
Repurchase of common stock (in shares)		(481,638)
Repurchase of common stock	(13,916)	$ (5)	(13,911)
Stock-based compensation expense	969		969
Balance (in shares) at Sep. 30, 2022		28,136,611
Balance at Sep. 30, 2022	656,302	$ 281	511,434	307,975	(163,388)
Balance (in shares) at Dec. 31, 2022		52,954,985
Balance at Dec. 31, 2022	1,383,176	$ 530	1,222,761	303,146	(143,261)
Net income	103,231			103,231
Other comprehensive loss	(13,712)				(13,712)
Cash dividends declared	(20,777)			(20,777)
Common stock issued in connection with the exercise of stock options and restricted stock awards (in shares)		366,556
Common stock issued in connection with the exercise of stock options and restricted stock awards	693	$ 3	690
Stock-based compensation expense	8,235		8,235
Balance (in shares) at Sep. 30, 2023		53,321,541
Balance at Sep. 30, 2023	1,460,846	$ 533	1,231,686	385,600	(156,973)
Balance (in shares) at Jun. 30, 2023		53,302,734
Balance at Jun. 30, 2023	1,458,680	$ 533	1,228,532	361,619	(132,004)
Net income	30,908			30,908
Other comprehensive loss	(24,969)				(24,969)
Cash dividends declared	(6,927)			(6,927)
Common stock issued in connection with the exercise of stock options and restricted stock awards (in shares)		18,807
Common stock issued in connection with the exercise of stock options and restricted stock awards	342		342
Stock-based compensation expense	2,812		2,812
Balance (in shares) at Sep. 30, 2023		53,321,541
Balance at Sep. 30, 2023	$ 1,460,846	$ 533	$ 1,231,686	$ 385,600	$ (156,973)

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Per share amount of cash dividends declared (in dollars per share)	$ 0.13	$ 0.10	$ 0.39	$ 0.30

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 103,231	$ 49,380
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and core deposit intangibles amortization	26,265	5,300
Provision for credit losses	7,896	5,919
Deferred income tax benefit	11,617	(954)
Net amortization of premium on investments	5,098	7,903
Excess tax benefit from stock-based compensation	(70)	(312)
Bank-owned life insurance income	(1,605)	(610)
Net accretion of discount on loans	(35,065)	(165)
Net amortization of discount on subordinated debt	88	87
Net accretion of discount on certificates of deposit	(21)	(45)
Net gain on sale of assets	(192)	(25)
Federal Home Loan Bank stock dividends	(799)	(64)
Stock-based compensation expense	8,235	2,859
Net change in operating leases	3,055	2,178
Increase in accrued interest receivable and other assets	(165)	(1,415)
Increase in accrued interest payable and other liabilities	9,319	4,082
Net cash provided by operating activities	136,887	74,118
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities and principal paydowns of available for sale securities	685,707	2,320,157
Proceeds from sales and calls of available for sale securities	320,691	12,056
Purchase of available for sale securities	(633,287)	(2,414,630)
Net change in total loans	(223,256)	(371,904)
Purchase of bank premises and equipment	(5,621)	(668)
Proceeds from sale of bank premises, equipment and other real estate	3,685	0
Net purchase of Federal Home Loan Bank stock	(13,165)	(7,421)
Net cash provided by (used in) investing activities	134,754	(462,410)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (decrease) increase in noninterest-bearing deposits	(573,881)	222,754
Net decrease in interest-bearing deposits	(7,109)	(609,629)
Net change in short-term other borrowed funds	260,000	167,000
Dividends paid to common shareholders	(20,777)	(8,497)
Proceeds from the issuance of common stock and stock option exercises	693	1,328
Repurchase of common stock	0	(23,606)
Net cash used in financing activities	(341,074)	(250,650)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(69,433)	(638,942)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	371,705	757,509
CASH AND CASH EQUIVALENTS, END OF PERIOD	302,272	118,567
SUPPLEMENTAL CASH FLOW INFORMATION:
Income taxes paid	7,500	10,550
Interest paid	102,299	16,761
Cash paid for operating lease liabilities	3,372	2,559
SUPPLEMENTAL NONCASH DISCLOSURE:
Branch assets transferred to assets held for sale	$ 3,819	$ 2,137

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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES

Nature of Operations-Stellar Bancorp, Inc. (“Stellar”) through its wholly-owned subsidiary, Stellar Bank, (the “Bank”), and together with Stellar, collectively referred to herein as “we,” “us,” “our” and the “Company”), provides a diversified range of commercial banking services primarily to small- to medium-sized businesses. Stellar derives substantially all of its revenues and income from the operation of the Bank.

    We refer to the Houston-The Woodlands-Sugar Land metropolitan statistical area (“MSA”), as the Houston region (“Houston

region”) and the Beaumont-Port Arthur MSA, as the Beaumont region (“Beaumont region”). The Company is focused on delivering a

wide variety of relationship-driven commercial banking products and community-oriented services tailored to meet the needs of small-to medium-sized businesses, professionals and individuals through its 55 banking centers with 38 banking centers in the Houston

region, 16 banking centers in the Beaumont region and one banking center in Dallas, Texas, which we collectively refer to as our

markets.

Basis of Presentation-The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and in accordance with guidance provided by the Securities and Exchange Commission (“SEC”). Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis, and all such adjustments are of a normal recurring nature. Transactions between Stellar and the Bank have been eliminated. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

Merger of Equals-The merger of equals (the “Merger”) between Allegiance Bancshares, Inc. (“Allegiance”) and CBTX, Inc. (“CBTX”), was effective on October 1, 2022, with CBTX as the surviving corporation that was renamed Stellar Bancorp, Inc. At the effective time of the Merger, each outstanding share of Allegiance common stock, par value of $1.00 per share, was converted into the right to receive 1.4184 shares of common stock of the Company. Immediately following the Merger, CommunityBank of Texas, N.A. (“CommunityBank”), a national banking association and a wholly-owned subsidiary of CBTX, merged with and into Allegiance Bank, a wholly owned subsidiary of Allegiance, with Allegiance Bank as the surviving bank. Allegiance Bank changed its name to Stellar Bank on February 18, 2023 in connection with the operational conversion.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Allegiance was the accounting acquirer and CBTX was the legal acquirer and the accounting acquiree. Accordingly, the historical financial statements of Allegiance became the historical financial statements of the combined company for all periods prior to October 1, 2022 (the “Merger Date”). In addition, the assets and liabilities of CBTX have been recorded at their estimated fair values and added to those of Allegiance as of October 1, 2022. The determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events that are subjective.

The Company’s results of operations for the three and nine months ended September 30, 2022 reflect Allegiance's historical results and do not include the historical results of CBTX. The Merger had a significant impact on all aspects of the Company’s financial statements, and financial results for periods after the Merger are not comparable to financial results for periods prior to the Merger. The number of shares issued and outstanding, earnings per share, capital surplus, dividends paid and all references to share quantities of the Company have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of

Allegiance common stock in the Merger. See Note 2 – Acquisitions in the accompanying notes to the consolidated financial statements for the impact of the Merger.

Significant Accounting and Reporting Policies

The Company’s significant accounting and reporting policies can be found in Note 1 of the Company’s annual financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Adoption of New Accounting Standards

ASU 2022-02, "Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." became effective for the Company for the first quarter of 2023 and did not have a significant impact on the Company’s financial statements. ASU 2022-02 eliminates the troubled debt restructuring ("TDR") accounting model for creditors that have already adopted Topic 326, which is commonly referred to as the current expected credit loss model. In lieu of the TDR accounting model, the Company applies the general loan modification guidance in Subtopic 310-20 to all loan modifications, including modifications made for borrowers experiencing financial difficulty on a prospective basis. Under the general loan modification guidance, a modification is treated as a new loan only if the following two conditions are met: (1) the terms of the new loan are at least as favorable to the lender as the terms for comparable loans to other customers with similar collection risks; and (2) modifications to the terms of the original loan are more than minor. If either condition is not met, the modification is accounted for as the continuation of the old loan with any effect of the modification treated as a prospective adjustment to the loan’s effective interest rate.

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ACQUISITIONS

9 Months Ended

Sep. 30, 2023

Business Combination and Asset Acquisition [Abstract]

ACQUISITIONS

ACQUISITIONS

Merger of Equals

As described in Note 1 – Nature of Operations and Summary of Significant Accounting and Reporting Policies, the Merger was completed on October 1, 2022.

Allegiance merged with and into CBTX with the surviving corporation renamed Stellar Bancorp, Inc. At the effective date of the Merger, each outstanding share of Allegiance common stock was converted into the right to receive 1.4184 shares of common stock of the Company.

The Company issued 28.1 million shares of its common stock to Allegiance shareholders in connection with the Merger, which represented 54.0% of the voting interests in the Company upon completion of the Merger. In accordance with FASB ASC 805-40-30-2, the purchase price in a reverse acquisition is determined based on the number of equity interests the legal acquiree would have had to issue to give the owners of the legal acquirer the same percentage equity interest in the combined entity that results from the reverse acquisition.

The table below summarizes the ownership of the combined company following the Merger, for each shareholder group, using shares of CBTX and Allegiance common stock outstanding at September 30, 2022 and Allegiance’s closing price on September 30, 2022 (shares in thousands).

	Stellar Bancorp, Inc. Ownership
	Number of CBTX Outstanding Shares	Percentage Ownership
CBTX shareholders	24,015	46.0	%
Allegiance shareholders	28,137	54.0	%
Total	52,152	100.0	%

The Merger was accounted for as a reverse merger using the acquisition method of accounting, which means that for accounting and financial reporting purposes, Allegiance was deemed to have acquired CBTX in the Merger, even though CBTX was the legal acquirer. Accordingly, Allegiance's historical financial statements are the historical financial statements of the combined company for all periods prior to October 1, 2022.

Total acquisition and merger-related expenses recognized for the three months ended September 30, 2023 and 2022 were $3.4 million and $10.6 million, respectively, and $12.5 million and $12.7 million for the nine months ended September 30, 2023 and 2022, respectively.

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GOODWILL AND OTHER INTANGIBLE ASSETS

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of the Company’s goodwill and core deposit intangible assets were as follows:

	Goodwill		Core Deposit Intangibles		Servicing Assets
	(In thousands)
Balance as of December 31, 2021	$	223,642	$	14,658	$	—
Acquired intangibles	273,618		138,150		329
Amortization	—		(9,283)		(20)
Balance as of December 31, 2022	497,260		143,525		309
Amortization	—		(20,581)		(55)
Measurement period adjustment	58		—		—
Decrease due to payoff of serviced loans	—		—		(27)
Balance as of September 30, 2023	$	497,318	$	122,944	$	227

Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired recorded on the acquisition date of an entity. During the measurement period, the Company may record subsequent adjustments to goodwill for provisional amounts recorded at the acquisition date. During the third quarter of 2023, the Company completed the final tax returns related to CBTX's business and operations through September 30, 2022. After completion of these tax returns, the Company increased income tax balances and goodwill in the amount of $58 thousand which finalized all purchase accounting adjustments for the Merger.

Goodwill is subject to impairment testing, which must be conducted at least annually or upon the occurrence of a triggering event. Various factors, such as the Company’s results of operations, the trading price of the Company’s common stock relative to the book value per share, macroeconomic conditions and conditions in the banking sector, inform whether a triggering event for an interim goodwill impairment test has occurred. Goodwill is recorded and evaluated for impairment at its reporting unit, the Company. The Company's policy is to test goodwill for impairment annually as of October 1st, or on an interim basis if an event triggering an impairment assessment is determined to have occurred.

Testing of goodwill impairment comprises a two-step process. First, the Company performs a qualitative assessment to evaluate relevant events or circumstances to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company determines that it is more likely than not that an impairment has occurred, it proceeds to the quantitative impairment test, whereby it calculates the fair value of the reporting unit and compares it with its carrying amount, including goodwill. In its performance of impairment testing, the Company has the unconditional option to proceed directly to the quantitative impairment test, bypassing the qualitative assessment. If the carrying amount of the reporting unit exceeds the fair value, the amount by which the carrying amount exceeds fair value, up to the carrying value of goodwill, is recorded through earnings as an impairment charge. If the results of the qualitative assessment indicate that it is not more likely than not that an impairment has occurred, or if the quantitative impairment test results in a fair value of the reporting unit that is greater than the carrying amount, then no impairment charge is recorded.

During the nine months ended September 30, 2023, economic uncertainty and market volatility resulting from the rising interest rate environment and the recent banking crisis resulted in a decrease in the Company's stock price and market capitalization. Management believed such decrease was a triggering event requiring an interim goodwill impairment quantitative analysis for the third quarter 2023. As a result, the Company performed a qualitative assessment and quantitative impairment test on its only reporting unit as of September 30, 2023 and determined that there was no impairment as the fair value exceeded the carrying amount of the Company. If the Company had deemed intangible assets to be impaired, a non-cash charge for the amount of such impairment would be recorded through earnings and would have no impact on tangible capital or our regulatory capital.

The estimated aggregate future amortization expense for core deposit intangible assets remaining as of September 30, 2023 is as follows (in thousands):

Remaining 2023	$	6,232
2024	24,166
2025	21,528
2026	18,896
Thereafter	52,122
Total	$	122,944

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SECURITIES

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

SECURITIES

SECURITIES

The amortized cost and fair value of investment securities were as follows:

	September 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	409,152	$	129	$	(15,873)	$	393,408
Municipal securities	258,901		545		(40,330)		219,116
Agency mortgage-backed pass-through securities	378,573		22		(50,401)		328,194
Agency collateralized mortgage obligations	444,234		—		(78,356)		365,878
Corporate bonds and other	122,812		29		(14,485)		108,356
Total	$	1,613,672	$	725	$	(199,445)	$	1,414,952

	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	433,417	$	90	$	(19,227)	$	414,280
Municipal securities	580,076		4,319		(43,826)		540,569
Agency mortgage-backed pass-through securities	370,471		362		(42,032)		328,801
Agency collateralized mortgage obligations	461,760		—		(67,630)		394,130
Corporate bonds and other	143,192		2		(13,388)		129,806
Total	$	1,988,916	$	4,773	$	(186,103)	$	1,807,586

As of September 30, 2023, no allowance for credit losses has been recognized on available for sale securities in an unrealized loss position as management does not believe any of the securities are impaired due to reasons of credit quality. This belief is based upon our analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors related to our available for sale securities and in consideration of our historical credit loss experience and internal forecasts. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. Furthermore, management does not have the intent to sell any of the securities classified as available for sale in the table above and believes that it is more likely than not that we will not have to sell any such securities before a recovery of cost. The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline.

The amortized cost and fair value of investment securities at September 30, 2023, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations at any time with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	77,562	$	77,026
Due after one year through five years	185,518		174,016
Due after five years through ten years	141,625		125,892
Due after ten years	386,160		343,946
Subtotal	790,865		720,880
Agency mortgage-backed pass-through securities     and collateralized mortgage obligations	822,807		694,072
Total	$	1,613,672	$	1,414,952

Securities with unrealized losses segregated by length of time such securities have been in a continuous loss position are as follows:

	September 30, 2023
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	111,573	$	(3,328)	$	261,872	$	(12,545)	$	373,445	$	(15,873)
Municipal securities	18,062		(640)		166,011		(39,690)		184,073		(40,330)
Agency mortgage-backed     pass-through securities	79,012		(3,829)		248,186		(46,572)		327,197		(50,401)
Agency collateralized mortgage     obligations	13,881		(168)		351,996		(78,188)		365,878		(78,356)
Corporate bonds and other	11,314		(1,249)		81,556		(13,236)		92,870		(14,485)
Total	$	233,842	$	(9,214)	$	1,109,621	$	(190,231)	$	1,343,463	$	(199,445)

	December 31, 2022
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	99,732	$	(1,427)	$	305,256	$	(17,800)	$	404,988	$	(19,227)
Municipal securities	228,192		(14,473)		134,640		(29,353)		362,832		(43,826)
Agency mortgage-backed      pass-through securities	95,291		(7,612)		199,836		(34,420)		295,127		(42,032)
Agency collateralized mortgage      obligations	117,147		(14,426)		276,925		(53,204)		394,072		(67,630)
Corporate bonds and other	72,913		(5,704)		49,893		(7,684)		122,806		(13,388)
Total	$	613,275	$	(43,642)	$	966,550	$	(142,461)	$	1,579,825	$	(186,103)

During the nine months ended September 30, 2023, the Company had sales and calls of securities of $320.5 million of securities recording gross gains of $234 thousand. During the nine months ended September 30, 2022, the Company sold $12.1 million of securities recording a gross gain of $42 thousand on the sale of those securities. At September 30, 2023 and December 31, 2022, the Company did not own securities of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of consolidated shareholders’ equity at such respective dates.

The carrying value of pledged securities was $711.8 million at September 30, 2023 and $978.9 million at December 31, 2022. The majority of the securities in each case were pledged to collateralize public fund deposits.

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LOANS AND ALLOWANCE FOR CREDIT LOSSES

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

LOANS AND ALLOWANCE FOR CREDIT LOSSES

LOANS AND ALLOWANCE FOR CREDIT LOSSES

The loan portfolio balances, net of unearned income and fees, consist of various types of loans primarily made to borrowers located within Texas and are segregated by class of loan as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Commercial and industrial	$	1,474,600	$	1,455,795
Paycheck Protection Program (PPP)	5,968		13,226
Real estate:
Commercial real estate (including multi-family residential)	4,076,606		3,931,480
Commercial real estate construction and land development	1,078,265		1,037,678
1-4 family residential (including home equity)	1,024,945		1,000,956
Residential construction	289,553		268,150
Consumer and other	54,591		47,466
Total loans	8,004,528		7,754,751
Allowance for credit losses on loans	(93,575)		(93,180)
Loans, net	$	7,910,953	$	7,661,571

Nonaccrual and Past Due Loans

An aging analysis of the recorded investment in past due loans, segregated by class of loans, is included below. The Company defines recorded investment as the outstanding loan balances including net deferred loan fees, and excluding accrued interest receivable of $36.4 million and $34.1 million as of September 30, 2023 and December 31, 2022, respectively, due to immateriality.

	September 30, 2023
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	3,535	$	—	$	3,535	$	14,971	$	1,456,094	$	1,474,600
Paycheck Protection Program (PPP)	85		—		85		20		5,863		5,968
Real estate:
Commercial real estate (including      multi-family residential)	19,649		—		19,649		13,563		4,043,394		4,076,606
Commercial real estate construction     and land development	4,405		—		4,405		170		1,073,690		1,078,265
1-4 family residential (including     home equity)	4,742		—		4,742		8,442		1,011,761		1,024,945
Residential construction	3,389		—		3,389		635		285,529		289,553
Consumer and other	215		—		215		490		53,886		54,591
Total loans	$	36,020	$	—	$	36,020	$	38,291	$	7,930,217	$	8,004,528

	December 31, 2022
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	1,591	$	—	$	1,591	$	25,297	$	1,428,907	$	1,455,795
Paycheck Protection Program (PPP)	517		—		517		105		12,604		13,226
Real estate:
Commercial real estate (including     multi-family residential)	3,222		—		3,222		9,970		3,918,288		3,931,480
Commercial real estate construction     and land development	851		—		851		—		1,036,827		1,037,678
1-4 family residential (including     home equity)	3,385		—		3,385		9,404		988,167		1,000,956
Residential construction	—		—		—		—		268,150		268,150
Consumer and other	192		—		192		272		47,002		47,466
Total loans	$	9,758	$	—	$	9,758	$	45,048	$	7,699,945	$	7,754,751

Credit Quality Indicators

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt. The Company utilizes a risk rating matrix to assign a risk rating to each of its loans. Loans are rated on a scale of 10 to 90. Risk ratings are updated on an ongoing basis and are subject to change by continuous loan monitoring processes including lending management monitoring, executive management and board committee oversight, and independent credit review. As part of the ongoing monitoring of the credit quality of the Company’s loan portfolio and methodology for calculating the allowance for credit losses, management assigns and tracks certain risk ratings to be used as credit quality indicators including trends related to (1) the weighted-average risk grade of loans, (2) the level of classified loans, (3) the delinquency status of loans, (4) nonperforming loans and (5) the general economic conditions in the our markets. Individual bankers, under the oversight of credit administration, review updated financial information for all pass grade commercial loans to reassess the risk grade on at least an annual basis. When a loan reaches a set of internally designated criteria, including Substandard or higher, a special assets officer will be involved in the monitoring of the loan on an on-going basis.

The following is a general description of the risk ratings used by the Company:

Pass—Credits in this category contain an acceptable amount of risk.

Special Mention—Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Substandard—Loans classified as substandard have well-defined weaknesses on a continuing basis and are inadequately protected by the current net worth and paying capacity of the borrower, declining collateral values, or a continuing downturn in their industry which is reducing their profits to below zero and having a significantly negative impact on their cash flow. These loans so classified are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Doubtful—Loans classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full on the basis of currently existing facts, conditions and values, highly questionable and improbable.

Loss—Loans classified as loss are to be charged-off or charged-down when payment is acknowledged to be uncertain or when the timing or value of payments cannot be determined. “Loss” is not intended to imply that the loan or some portion of it will never be paid, nor does it in any way imply that there has been a forgiveness of debt.

The following table presents risk ratings by category and the gross charge-offs by primary loan type and year of origination or renewal. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of September 30, 2023 and December 31, 2022:

	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans		Total		Total
	2023		2022		2021		2020		2019		Prior
	(In thousands)
Commercial and industrial
Pass	$	249,626	$	299,874	$	194,032	$	47,217	$	31,150	$	23,062	$	528,399	$	63,180	$	1,436,540	$	1,400,191
Special Mention	2,786		403		508		438		861		—		3,054		102		8,152		18,982
Substandard	1,250		3,925		9,303		1,140		12,131		281		1,057		771		29,858		36,568
Doubtful	—		50		—		—		—		—		—		—		50		54
Total commercial and industrial     loans	$	253,662	$	304,252	$	203,843	$	48,795	$	44,142	$	23,343	$	532,510	$	64,053	$	1,474,600	$	1,455,795
Current period gross charge-offs	$	—	$	130	$	4,264	$	456	$	129	$	—	$	4,143	$	531	$	9,653
Paycheck Protection Program (PPP)
Pass	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Special Mention	—		—		—		—		—		—		—		—		—		—
Substandard	—		—		—		—		—		—		—		—		—		—
Doubtful	—		—		—		—		—		—		—		—		—		—
Total PPP loans	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate     (including multi-family residential)
Pass	$	366,601	$	1,327,957	$	863,078	$	467,867	$	348,105	$	480,980	$	128,848	$	11,052	$	3,994,488	$	3,844,951
Special Mention	934		508		7,756		8,409		1,716		12,414		305		—		32,042		18,183
Substandard	3,906		5,050		16,003		6,832		5,009		12,890		286		100		50,076		68,346
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     (including multi-family     residential) loans	$	371,441	$	1,333,515	$	886,837	$	483,108	354830		$	506,284	$	129,439	$	11,152	$	4,076,606	$	3,931,480
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate construction     and land development
Pass	$	211,096	$	518,943	$	227,438	$	29,351	$	9,689	$	6,189	$	58,463	$	693	$	1,061,862	$	1,025,141
Special Mention	—		2,222		2,062		139		—		202		—		—		4,625		832
Substandard	22		1,016		10,406		88		80		17		—		149		11,778		11,705
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     construction and land development	$	211,118	$	522,181	$	239,906	$	29,578	$	9,769	$	6,408	$	58,463	$	842	$	1,078,265	$	1,037,678
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans
	2023		2022		2021		2020		2019		Prior						Total		Total
	(In thousands)
1-4 family residential (including     home equity)
Pass	$	132,680	$	252,160	$	224,562	$	116,514	$	72,701	$	90,921	$	94,320	$	10,248	$	994,106	$	969,396
Special Mention	499		569		—		1,996		333		195		98		—		3,690		3,714
Substandard	1,940		2,399		3,103		1,468		3,893		4,493		7,071		2,782		27,149		27,846
Doubtful	—		—		—		—		—		—		—		—		—		—
Total 1-4 family residential     (including home equity)	$	135,119	$	255,128	$	227,665	$	119,978	$	76,927	$	95,609	$	101,489	$	13,030	$	1,024,945	$	1,000,956
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	23	$	—	$	—	$	23
Residential construction
Pass	$	116,508	$	136,500	$	6,341	$	4,117	$	658	$	499	$	21,710	$	—	$	286,333	$	266,943
Special Mention	—		634		—		—		—		—		—		—		634		421
Substandard	—		635		1,951		—		—		—		—		—		2,586		786
Doubtful	—		—		—		—		—		—		—		—		—		—
Total residential construction	$	116,508	$	137,769	$	8,292	$	4,117	$	658	$	499	$	21,710	$	—	$	289,553	$	268,150
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Consumer and other
Pass	$	23,489	$	9,146	$	4,130	$	2,005	$	676	$	465	$	13,192	$	901	$	54,004	$	47,062
Special Mention	—		26		—		—		—		—		45		—		71		43
Substandard	—		312		35		—		56		5		4		104		516		361
Doubtful	—		—		—		—		—		—		—		—		—		—
Total consumer and other	$	23,489	$	9,484	$	4,165	$	2,005	$	732	$	470	$	13,241	$	1,005	$	54,591	$	47,466
Current period gross charge-offs	$	—	$	44	$	—	$	—	$	—	$	—	$	1	$	—	$	45
Total loans
Pass	$	1,100,000	$	2,544,580	$	1,522,799	$	669,821	$	462,979	$	602,116	$	844,932	$	86,074	$	7,833,301	$	7,566,910
Special Mention	4,219		4,362		10,326		10,982		2,910		12,811		3,502		102		49,214		42,175
Substandard	7,118		13,337		40,801		9,528		21,169		17,686		8,418		3,906		121,963		145,612
Doubtful	—		50		—		—		—		—		—		—		50		54
Total loans	$	1,111,337	$	2,562,329	$	1,573,926	$	690,331	$	487,058	$	632,613	$	856,852	$	90,082	$	8,004,528	$	7,754,751
Current period gross charge-offs	$	—	$	174	$	4,264	$	456	$	129	$	23	$	4,144	$	531	$	9,721

The following table presents the activity in the allowance for credit losses on loans by portfolio type for the three and nine months ended September 30, 2023 and 2022:

	Commercial and industrial		Paycheck Protection Program (PPP)		Commercial real estate (including multi-family residential)		Commercial real estate construction and land development		1-4 family residential (including home equity)		Residential construction		Consumer and other		Total
	(In thousands)
Allowance for credit losses on     loans:
Three Months Ended
Balance June 30, 2023	$	38,505	$	—	$	38,963	$	14,500	$	4,757	$	3,080	$	390	$	100,195
Provision for credit losses on loans	2,173		—		58		(791)		34		(221)		243		1,496
Charge-offs	(8,169)		—		—		—		—		—		(7)		(8,176)
Recoveries	55		—		2		—		—		—		3		60
Net charge-offs	(8,114)		—		2		—		—		—		(4)		(8,116)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Nine Months Ended
Balance December 31, 2022	$	41,236	$	—	$	32,970	$	14,121	$	2,709	$	1,796	$	348	$	93,180
Provision for credit losses on loans	(143)		—		6,037		(412)		2,096		1,063		298		8,939
Charge-offs	(9,653)		—		—		—		(23)		—		(45)		(9,721)
Recoveries	1,124		—		16		—		9		—		28		1,177
Net charge-offs	(8,529)		—		16		—		(14)		—		(17)		(8,544)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Three Months Ended
Balance June 30, 2022	$	16,701	$	—	$	24,000	$	7,399	$	1,036	$	1,048	$	58	$	50,242
Provision for credit losses on loans	(1,091)		—		1,606		952		(9)		188		14		1,660
Charge-offs	(2)		—		(56)		—		—		—		(17)		(75)
Recoveries	319		—		—		—		—		—		1		320
Net recoveries	317		—		(56)		—		—		—		(16)		245
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147
Nine Months Ended
Balance December 31, 2021	$	16,629	$	—	$	23,143	$	6,263	$	847	$	975	$	83	$	47,940
Provision for credit losses on loans	(464)		—		2,740		2,096		180		261		37		4,850
Charge-offs	(958)		—		(383)		(63)		—		—		(65)		(1,469)
Recoveries	720		—		50		55		—		—		1		826
Net charge-offs	(238)		—		(333)		(8)		—		—		(64)		(643)
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147

Allowance for Credit Losses on Unfunded Commitments

In addition to the allowance for credit losses on loans, the Company has established an allowance for credit losses on unfunded commitments, classified in other liabilities and adjusted as a provision for credit loss expense. The allowance represents estimates of expected credit losses over the contractual period in which there is exposure to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on the commitments expected to fund. The estimate of commitments expected to fund is informed by historical analysis looking at utilization rates. The expected credit loss rates applied to the commitments expected to fund is informed by the general valuation allowance utilized for outstanding balances with the same underlying assumptions and drivers. The allowance for credit losses on unfunded commitments as of September 30, 2023 and December 31, 2022 was $10.9 million and $12.0 million, respectively. This reserve is maintained at a level management believes to be sufficient to absorb losses arising from unfunded loan commitments. The Company recorded an $818 thousand provision on unfunded commitments during the three months ended September 30, 2023 compared to $302 thousand for the three months ended September 30, 2022 and recorded a $1.0 million reversal of provision on unfunded commitments for the nine months ended September 30, 2023 compared to a provision of $1.1 million for the nine months ended September 30, 2022.

Collateral dependent loans are secured by real estate assets, accounts receivable, inventory and equipment. For a collateral dependent loan, the Company’s evaluation process includes a valuation by appraisal or other collateral analysis adjusted for selling costs, when appropriate. This valuation is compared to the remaining outstanding principal balance of the loan. If a loss is determined to be probable, the loss is included in the allowance for credit losses on loans as a specific allocation.

The following tables present the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses as of September 30, 2023 and December 31, 2022:

	September 30, 2023
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	7,476	$	—	$	7,476
Real estate:
Commercial real estate (including multi-family residential)	3,411		—		—		3,411
Commercial real estate construction and land development			—		—		—
1-4 family residential (including home equity)	—		—		—		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	3,411	$	7,476	$	—	$	10,887

	December 31, 2022
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	18,411	$	30	$	18,441
Real estate:
Commercial real estate (including multi-family residential)	1,612		—		—		1,612
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	3,478		—		—		3,478
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	5,090	$	18,411	$	30	$	23,531

The following tables present additional information regarding nonaccrual loans. No interest income was recognized on nonaccrual loans as of September 30, 2023 and December 31, 2022.

	September 30, 2023
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	10,337	$	4,634	$	14,971
Paycheck Protection Program (PPP)	20		—		20
Real estate:
Commercial real estate (including multi-family residential)	10,820		2,743		13,563
Commercial real estate construction and land development	170		—		170
1-4 family residential (including home equity)	6,849		1,593		8,442
Residential construction	635		—		635
Consumer and other	81		409		490
Total loans	$	28,912	$	9,379	$	38,291

	December 31, 2022
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	2,776	$	22,521	$	25,297
Paycheck Protection Program (PPP)	105		—		105
Real estate:
Commercial real estate (including multi-family residential)	8,704		1,266		9,970
Commercial real estate construction and land development	—		—		—
1-4 family residential (including home equity)	4,856		4,548		9,404
Residential construction	—		—		—
Consumer and other	94		178		272
Total loans	$	16,535	$	28,513	$	45,048

Loan Modifications and Troubled Debt Restructurings

Effective January 1, 2023, under ASU 2022-02, loan modifications are reported if concessions have been granted to borrowers that are experiencing financial difficulty. Information on these loan modifications originated after the effective date is presented according to the new accounting guidance. Reporting periods prior to the adoption of ASU 2022-02 present information on troubled debt restructurings ("TDRs") under the previous disclosure requirements. The percentage of loans modified comprised less than 1% of their respective classes of loan portfolios at September 30, 2023.

The following tables present information regarding loans that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

		Three Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Real estate:
Commercial real estate (including     multi-family residential)		—		1,890		—		—		—		—		1,890
Commercial real estate construction and land development		—				—		—		—		—		—
1-4 family residential (including home equity)		—		322		99		—		—		71		492
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		—		—		—		—		—		—
Total		$	—	$	2,212	$	—	$	—	$	—	$	71	$	2,382

		Nine Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	89	$	2,185	$	—	$	—	$	—	$	260	$	2,534
Real estate:
Commercial real estate (including multi-family residential)		—		2,670		—		—		—		1,703		4,373
Commercial real estate construction and land development		—		6,850		—		—		—		—		6,850
1-4 family residential (including home equity)		—		1,037		99		—		—		71		1,207
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		94		—		—		—		—		94
Total		$	89	$	12,836	$	99	$	—	$	—	$	2,034	$	15,058

The following table summarizes, by loan portfolio, the financial effect of the Company's loan modifications for the three and nine months ended September 30, 2023:

	Three Months Ended September 30, 2023			Nine Months Ended September 30, 2023
	Weighted Average Interest Rate Reduction		Weighted Average Term Extension	Weighted Average Interest Rate Reduction		Weighted Average Term Extension
			(months)			(months)
Commercial and industrial	—	%	—	2.0	%	12
Real estate:
Commercial real estate (including multi-family residential)	—	%	6	—	%	9
Commercial real estate construction and land development	—	%	—	—	%	12
1-4 family residential (including home equity)	1.5	%	24	1.5	%	16
Residential construction	—	%	—	—	%	—
Consumer and other	—	%	—	—	%	7

The following table summarizes loans that had a payment default within the past twelve months that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

	Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness
	(In thousands)
Commercial and industrial	$	89	$	670	$	—	$	—
Real estate:
Commercial real estate (including multi-family residential)	—		—		—		—
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	—		715		99		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
	$	89	$	1,385	$	99	$	—

The following table presents information regarding loans modified in a troubled debt restructuring during the three and nine months ended September 30, 2022:

	Three Months Ended September 30, 2022					Nine Months Ended September 30, 2022
	Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment		Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Commercial and industrial	1	$	224	$	224	4	$	768	$	768
Real estate:
Commercial real estate (including multi-family residential)	—	—		—		4	1,207		1,207
Consumer and other	1	45		45		1	45		45
Total	2	$	269	$	269	9	$	2,020	$	2,020

Troubled debt restructurings resulted in no charge-offs during the nine months ended September 30, 2022. There were no loans modified under a trouble debt restructuring during the previous twelve-month period that subsequently defaulted during the nine-month period ended September 30, 2022. Default is determined to at 90 or more days past due. The trouble debt restructurings related to extending the amortization periods of the loans. The Company did not grant principal reductions on any restructured loans during the nine months ended September 30, 2022. There were no commitments to lend additional amounts to borrowers with trouble debt restructured loans for the three and nine months ended September 30, 2022.

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LEASES

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

LEASES

LEASES

Lease payments over the expected term are discounted using the Company’s incremental borrowing rate for borrowings of similar terms. Generally, the Company cannot be reasonably certain about whether or not it will renew a lease until such time as the lease is within the last two years of the existing lease term. When the Company is reasonably certain that a renewal option will be exercised, it measures/remeasures the right-of-use asset and related lease liability using the lease payments specified for the renewal period or, if such amounts are unspecified, the Company generally assumes an increase (evaluated on a case-by-case basis in light of prevailing market conditions) in the lease payment over the final period of the existing lease term.

There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the nine months ended September 30, 2023 and 2022.

At September 30, 2023, the Company had 31 leases consisting of branch locations and office space. On the September 30, 2023 balance sheet, the right-of-use asset is classified within premises and equipment and the lease liability is included in other liabilities. The Company also owns certain office facilities which it leases to outside parties under operating lessor leases; however, such leases are not significant. All leases were classified as operating leases. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term.

Certain leases include options to renew, with renewal terms that can extend the lease term from one to five years. Lease assets and liabilities include related options that are reasonably certain of being exercised. The depreciable life of leased assets are limited by the expected lease term.

Supplemental lease information at the dates indicated is as follows:

	September 30, 2023			December 31, 2022
	(Dollars in thousands)
Balance Sheet:
Operating lease right of use asset classified as premises and equipment	$	20,483		$	23,538
Operating lease liability classified as other liabilities	$	20,225		$	23,136
Weighted average lease term, in years	7.91			8.18
Weighted average discount rate	4.14		%	4.00		%

Lease costs for the dates indicated is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(In thousands)
Income Statement:
Operating lease cost	$	1,885	$	836	$	5,280	$	2,559
Short-term lease cost	8		—		21		—
Total operating lease costs	$	1,893	$	836	$	5,301	$	2,559

A maturity analysis of the Company’s lease liabilities is as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Lease payments due:
Within one year	$	1,171	$	4,634
After one but within two years	4,137		4,121
After two but within three years	3,681		3,684
After three but within four years	3,125		3,132
After four but within five years	2,914		2,918
After five years	9,279		9,303
Total lease payments	24,307		27,792
Less: discount on cash flows	4,082		4,656
Total lease liability	$	20,225	$	23,136

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FAIR VALUE

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

FAIR VALUE

FAIR VALUE

The Company uses fair value measurements to record fair value adjustments to certain assets and to determine fair value disclosures. Fair value represents the exchange price that would be received from selling an asset or paid to transfer a liability, otherwise known as an “exit price,” in the principal or most advantageous market available to the entity in an orderly transaction between market participants on the measurement date.

Fair Value Hierarchy

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company groups financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:

•Level 1—Quoted prices for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

•Level 2—Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

•Level 3—Significant unobservable inputs that reflect management’s judgment and assumptions that market participants would use in pricing an asset or liability that are supported by little or no market activity.

The carrying amounts and estimated fair values of financial instruments that are reported on the balance sheet are as follows:

	September 30, 2023
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	302,272	$	302,272	$	—	$	—	$	302,272
Available for sale securities	1,414,952		—		1,414,952		—		1,414,952
Loans held for investment, net of allowance	7,910,953		—		—		7,615,073		7,615,073
Accrued interest receivable	43,536		176		6,947		36,413		43,536
Financial liabilities
Deposits	$	8,686,621	$	—	$	8,677,026	$	—	$	8,677,026
Accrued interest payable	7,612		—		7,612		—		7,612
Borrowed funds	323,981		—		323,998		—		323,998
Subordinated debt	109,665		—		107,469		—		107,469

	December 31, 2022
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	371,705	$	371,705	$	—	$	—	$	371,705
Available for sale securities	1,807,586		—		1,807,586		—		1,807,586
Loans held for investment, net of allowance	7,661,571		—		—		7,555,602		7,555,602
Accrued interest receivable	44,743		25		10,585		34,133		44,743
Financial liabilities
Deposits	$	9,267,632	$	—	$	9,256,141	$	—	$	9,256,141
Accrued interest payable	2,098		—		2,098		—		2,098
Borrowed funds	63,925		—		63,999		—		63,999
Subordinated debt	109,367		—		107,910		—		107,910

The following tables present fair values for assets and liabilities measured at fair value on a recurring basis. There were no liabilities measured at fair value on a recurring basis as of September 30, 2023.

	September 30, 2023
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	393,408	$	—	$	393,408
Municipal securities	—		219,116		—		219,116
Agency mortgage-backed pass-through securities	—		328,194		—		328,194
Agency collateralized mortgage obligations	—		365,878		—		365,878
Corporate bonds and other	—		108,356		—		108,356
Interest rate swaps	—		—		10,218		10,218
Credit risk participation agreements	—		—		10		10
Total fair value of financial assets	$	—	$	1,414,952	$	10,228	$	1,425,180
Financial liabilities
Interest rate swaps	$	—	$	—	$	10,218	$	10,218
Total fair value of financial liabilities	$	—	$	—	$	10,218	$	10,218

	December 31, 2022
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	414,280	$	—	$	414,280
Municipal securities	—		540,569		—		540,569
Agency mortgage-backed pass-through securities	—		328,801		—		328,801
Agency collateralized mortgage obligations	—		394,130		—		394,130
Corporate bonds and other	—		129,806		—		129,806
Interest rate swaps	—		—		9,263		9,263
Credit risk participation agreements	—		—		27		27
Total fair value of financial assets	$	—	$	1,807,586	$	9,290	$	1,816,876
Financial liabilities
Interest rate swaps	$	—	$	—	$	9,263	$	9,263
Total fair value of financial liabilities	$	—	$	—	$	9,263	$	9,263

There were no transfers between levels during the nine months ended September 30, 2023 or 2022.

Assets measured at fair value on a nonrecurring basis are summarized in the table below. There were no liabilities measured at fair value on a nonrecurring basis at September 30, 2023 and December 31, 2022.

	September 30, 2023
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	13,830
Commercial real estate (including multi-family residential)	—		—		7,706
Commercial real estate construction and land development	—		—		6,654
1-4 family residential (including home equity)	—		—		2,776
Consumer and other	—		—		88
Branch assets held for sale	5,852		—		—
	$	5,852	$	—	$	31,054

	December 31, 2022
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	21,948
Commercial real estate (including multi-family residential)	—		—		11,566
1-4 family residential (including home equity)	—		—		2,883
Branch assets held for sale	5,165		—		—
	$	5,165	$	—	$	36,397

Branch assets held for sale include banking centers that have closed and are for sale.

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DEPOSITS

9 Months Ended

Sep. 30, 2023

Deposit Liabilities [Abstract]

DEPOSITS

DEPOSITS

Time deposits that met or exceeded the Federal Deposit Insurance Corporation ("FDIC") insurance limit of $250,000 thousand at September 30, 2023 and December 31, 2022 were $560.2 million and $432.9 million, respectively.

Scheduled maturities of time deposits for the next five years are as follows (in thousands):

Within one year	$	1,399,265
After one but within two years	85,040
Over three years	19,586
Total	$	1,503,891

The Company had $579.0 million and $72.5 million of brokered deposits as of September 30, 2023 and December 31, 2022, respectively. There were no concentrations of deposits with any one depositor at September 30, 2023 and December 31, 2022.

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DERIVATIVE INSTRUMENTS

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS

Financial derivatives are reported at fair value in other assets or other liabilities. The accounting for changes in the fair value of a derivative depends on whether it has been designated and qualifies as part of a hedging relationship.

Derivatives not designated as hedges

The Company has outstanding interest rate swap contracts with certain customers and equal and offsetting interest rate swaps with other financial institutions entered into at the same time. These interest rate swap contracts are not designated as hedging instruments for mitigating interest rate risk. The objective of the transactions is to allow customers to effectively convert a variable rate loan to a fixed rate.

In connection with each swap transaction, the Company agreed to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agreed to pay a third-party financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. Because the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts are designed to offset each other and do not significantly impact the Company’s operating results except in certain situations where there is a significant deterioration in the customer’s credit worthiness or that of the counterparties. At September 30, 2023, management determined there was no such deterioration.

At September 30, 2023 and December 31, 2022, the Company had 15 and 14 interest rate swap agreements outstanding with borrowers and financial institutions, respectively. These derivative instruments are not designated as accounting hedges and changes in the net fair value are recognized in other noninterest income. Fair value amounts are included in other assets and other liabilities.

At September 30, 2023 and December 31, 2022, the Company had three credit risk participation agreements with another financial institution that are associated with interest rate swaps related to loans for which the Company is the lead agent bank and the other financial institution provides credit protection to the Company should the borrower fail to perform under the terms of the interest rate swap agreements. The fair value of the agreements is determined based on the market value of the underlying interest rate swaps adjusted for credit spreads and recovery rates.

Derivative instruments not designated as hedges outstanding as of September 30, 2023 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	110,946	$	9,758	3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Financial institutions	Other assets	4,940		460		4.99%	U.S. Prime	4.21
Customers	Other liabilities	4,940		(460)		4.99%	U.S. Prime	4.21
Customers	Other liabilities	110,946		(9,758)		3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Credit risk participations:
Financial institutions	Other assets	20,958		10		3.50% - 5.40%	SOFR CME 1M + 2.50%	7.58

Derivative instruments not designated as hedges outstanding as of December 31, 2022 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	109,242	$	8,856	3.25% - 5.58%	SOFR CME 1M + 2.50% - 3.00%	5.49
Financial institutions	Other assets	5,029		407		4.99%	U.S. Prime	4.96
Customers	Other liabilities	5,029		(407)		4.99%	U.S. Prime	4.96
Customers	Other liabilities	109,242		(8,856)		3.25% - 5.58%	SOFR CME 1M + 2.50%	5.49
Credit risk participations:
Financial institutions	Other assets	13,028		2		3.50%	LIBOR 1M + 2.50%	7.24
Financial institutions	Other assets	8,485		25		5.35% - 5.40%	SOFR CME 1M + 2.50%	9.97

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BORROWINGS AND BORROWING CAPACITY

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

BORROWINGS AND BORROWING CAPACITY

BORROWINGS AND BORROWING CAPACITY

The Company has an available line of credit with the Federal Home Loan Bank (“FHLB”) of Dallas, which allows the Company to borrow on a collateralized basis. FHLB advances are used to manage liquidity as needed. The advances are secured by a blanket lien on certain loans. Maturing advances are replaced by drawing on available cash, making additional borrowings or through increased customer deposits. At September 30, 2023, the Company had a total borrowing capacity with the FHLB of $3.82 billion, of which $2.28 billion was available and $1.54 billion was outstanding in/through FHLB advances and letters of credit. There were $324.0 million of FHLB short-term advances outstanding at September 30, 2023 at a weighted-average rate of 5.62%. Letters of credit were $1.22 billion at September 30, 2023, of which $50.8 million will expire during the remaining months of 2023, $72.8 million will expire in 2024, $494.5 million will expire in 2025, $57.3 million will expire in 2026, $448.0 million will expire in 2027, $40.0 million will expire in 2028, $27.0 million will expire in 2029 and $30.0 million will expire in 2031.

On December 13, 2022, the Company entered into a loan agreement with another financial institution, or the Loan Agreement, that provides for a $75.0 million revolving line of credit. At September 30, 2023, there were no outstanding borrowings on this line of credit and the Company did not draw on this line of credit during 2023 or 2022. The Company can make draws on the line

of credit for a period of 24 months, which began on December 13, 2022, after which the Company will not be permitted to make further draws. Interest accrues on outstanding borrowings at a per annum rate equal to the prime rate quoted by The Wall Street Journal and with a floor rate of 3.50% calculated in accordance with the terms of the revolving promissory note and payable quarterly through the first 24 months. The entire outstanding balance and unpaid interest is payable in full on December 13, 2024.

The Company may prepay the principal amount of the line of credit without premium or penalty. The obligations of the Company under the Loan Agreement are secured by a pledge of all the issued and outstanding shares of capital stock of Stellar Bank.

Covenants made under the Loan Agreement include, among other things, while there any obligations outstanding under Loan Agreement, the Company shall maintain a cash flow to debt service (as defined in the Loan Agreement) of not less than 1.25, the Bank’s Texas Ratio (as defined in the Loan Agreement) not to exceed 25.0%, and the Bank shall maintain a Tier 1 Leverage Ratio (as defined under the Loan Agreement) of at least 7.0% and restrictions on the ability of the Company and its subsidiaries to incur certain additional debt. As of September 30, 2023, the Company believes it was in compliance with all such debt covenants and had not been made aware of any noncompliance by the lender.

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SUBORDINATED DEBT

9 Months Ended

Sep. 30, 2023

Subordinated Borrowings [Abstract]

SUBORDINATED DEBT

SUBORDINATED DEBT

Junior Subordinated Debentures

In connection with the acquisition of F&M Bancshares, Inc., the Company assumed Farmers & Merchants Capital Trust II and Farmers & Merchants Capital Trust III. Each of these trusts is a capital or statutory business trust organized for the sole purpose of issuing trust securities and investing the proceeds in the Company’s junior subordinated debentures. The preferred trust securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common securities of each trust are wholly owned by the Company. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of payment to all of the Company’s present and future senior indebtedness. The Company has fully and unconditionally guaranteed each trust’s obligations under the trust securities issued by such trust to the extent not paid or made by such trust, provided such trust has funds available for such obligations. The junior subordinated debentures are included in Tier 1 capital under current regulatory guidelines and interpretations. Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and common securities will also be deferred.

A summary of pertinent information related to the Company’s issues of junior subordinated debentures outstanding at September 30, 2023 is set forth in the table below:

Description	Issuance Date	Trust Preferred Securities Outstanding		Interest Rate	Junior Subordinated Debt Owed to Trusts		Maturity Date(1)
(Dollars in thousands)
Farmers & Merchants Capital Trust II	November 13, 2003	$	7,500	3-Month SOFR + 3.26%	$	7,732	November 8, 2033
Farmers & Merchants Capital Trust III	June 30, 2005	3,500		3-Month SOFR + 2.06%	3,609		July 7, 2035
					$	11,341

(1) All debentures are currently callable.

Subordinated Notes

In December 2017, the Bank completed the issuance, through a private placement, of $40.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Bank Notes") due December 15, 2027. As of December 15, 2022, the Bank Notes bore a floating rate of interest equal to 3-Month LIBOR plus 3.03%, which transitioned to 3-Month SOFR plus a comparable spread adjustment immediately after June 30, 2023, until the Bank Notes mature on December 15, 2027, or such earlier redemption date, payable quarterly in arrears. The Bank Notes are redeemable by the Bank, in whole or in part, on or after December 15, 2022 or, in whole but not in part, upon the occurrence of certain specified tax events, capital events or investment company events. Any redemption will be at a redemption price equal to 100% of the principal amount of Bank Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Bank Notes are not subject to redemption at the

option of the holders. The Bank Notes are eligible for Tier 2 capital treatment, however, during the last five years of the instrument, the amount eligible must be reduced by 20% of the original amount annually and that no amount of the instrument is eligible for inclusion in Tier 2 capital when the remaining maturity of the instrument is less than one year. As the Bank Notes were within five years of maturity, only 80% of the notes are eligible for Tier 2 capital treatment at September 30, 2023.

In September 2019, the Company completed the issuance of $60.0 million aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Company Notes") due October 1, 2029. The Company Notes bear a fixed interest rate of 4.70% per annum until (but excluding) October 1, 2024, payable semi-annually in arrears on April 1 and October 1, commencing on April 1, 2020. Thereafter, from October 1, 2024 through the maturity date, October 1, 2029, or earlier redemption date, the Company Notes will bear interest at a floating rate equal to the then-current 3-Month SOFR, plus 3.13%, which transitioned from LIBOR immediately after June 30, 2023, for each quarterly interest period, payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year. Any redemption will be at a redemption price equal to 100% of the principal amount of Company Notes being redeemed, plus accrued and unpaid interest, and will be subject to, and require, prior regulatory approval. The Company Notes are not subject to redemption at the option of the holders.

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INCOME TAXES

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The amount of the Company’s federal and state income tax expense is influenced by the amount of pre-tax income, the amount of tax-exempt income and the amount of other nondeductible items.

	Three Months Ended						Nine Months Ended
	September 30, 2023			September 30, 2022			September 30, 2023			September 30, 2022
Income tax expense	$	7,445		$	3,406		$	24,825		$	11,310
Effective income tax rate	19.4		%	19.3		%	19.4		%	18.6		%

Interest and penalties related to tax positions are recognized in the period in which they begin accruing or when the entity claims the position that does not meet the minimum statutory thresholds. The Company does not have any uncertain tax positions and does not have any interest or penalties recorded in the income statement for the three or nine months ended September 30, 2023.

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STOCK BASED COMPENSATION

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

STOCK BASED COMPENSATION

STOCK BASED COMPENSATION

In connection with the closing of the Merger on October 1, 2022, the 2022 Omnibus Incentive Plan (the “2022 Plan”) approved by the Company’s shareholders at the special meeting of shareholders on May 23, 2022 became effective. Under the 2022 Plan, the Company is authorized to issue a maximum aggregate of 2,000,000 shares of common stock. All restricted stock and performance share awards outstanding at September 30, 2023 were issued under the 2022 Plan. At September 30, 2023, there were 1,017,319 shares reserved and available for issuance under the 2022 Plan.

The Company accounts for stock based employee compensation plans using the fair value-based method of accounting. The Company recognized total stock based compensation expense of $2.8 million and $969 thousand for the three months ended September 30, 2023 and 2022, respectively, and $8.2 million and $2.9 million for the nine months ended September 30, 2023 and 2022, respectively.

Stock Options

Stock options outstanding at September 30, 2023, were issued prior to the Merger under three equity compensation plans (1) the Allegiance 2015 Stock Awards and Incentive Plan, (2) the Allegiance 2019 Amended and Restated Stock Awards and Incentive Plan and (3) the CBTX 2014 Stock Option Plan. No additional shares may be issued under these compensation plans.

No options to purchase Company stock were granted during the nine months ended September 30, 2023. Options are exercisable for up to 10 years from the date of the grant and, dependent on the terms of the applicable award agreement generally vest three to four years after the date of grant. The fair value of stock options granted is estimated at the date of grant using the Black-Scholes option-pricing model.

A summary of the activity in the stock option plans during the nine months ended September 30, 2023 is set forth below:

	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(Shares in thousands)			(In years)	(Dollars in thousands)
Options outstanding, January 1, 2023	368	$	17.89	2.72	$	4,256
Options granted	—	—
Options exercised	(49)	14.19
Options forfeited	(36)	20.67
Options outstanding, September 30, 2023	283	$	18.18	2.17	$	1,036
Options vested and exercisable, September 30, 2023	283	$	18.18	2.17	$	1,036

Restricted Stock Awards

The fair value of the Company’s restricted stock awards is estimated based on the market value of the Company’s common stock at the date of grant, which is the closing price of the Company’s common stock on the day before the grant date. The shares of restricted stock granted during 2023 generally vest over a period of two or three years from the date of grant and the Company accounts for shares of restricted stock by recording the fair value of the grant on the award date as compensation expense over the vesting period.

Shares of restricted stock are considered outstanding at the date of issuance as the grantee becomes the record owner of the restricted stock and has voting, dividend and other shareholder rights. The shares of restricted stock are non-transferable and subject to forfeiture until the restricted stock awards vest and any dividends with respect to the restricted stock awards are subject to the same restrictions, including the risk of forfeiture.

A summary of the activity of the nonvested shares of restricted stock during the nine months ended September 30, 2023 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
	(Shares in thousands)
Nonvested share awards outstanding, January 1, 2023	501	$	32.84
Share awards granted	262	25.67
Share awards vested	(14)	25.99
Unvested share awards forfeited or cancelled	(64)	31.03
Nonvested share awards outstanding, September 30, 2023	685	30.41

As of September 30, 2023, there was $13.1 million of total unrecognized compensation cost related to the restricted stock awards which is expected to be recognized over a weighted-average period of 1.70 years.

Performance Share Awards ("PSAs")

PSAs are generally earned subject to certain performance goals being met after the two-year performance period and will be settled in shares of Company common stock following a one-year service period. There were 119,845 PSAs awarded during the nine months ended September 30, 2023. The grant date fair value of the PSAs is based on the probable outcome of the applicable performance conditions and is calculated at target based on a combination of the closing market price of our common stock on the grant date and a Monte Carlo simulated fair value in accordance with ASC 718. At September 30, 2023, there was $2.0 million of unrecognized compensation expense related to the PSAs, which is expected to be recognized over a weighted-average period of 2.0 years.

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OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES

OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES

In the normal course of business, the Company enters into various transactions, which, in accordance with accounting principles generally accepted in the United States, are not included in the Company’s consolidated balance sheets. The Company enters into these transactions to meet the financing needs of its customers. These transactions include commitments to extend credit and standby and commercial letters of credit, which involve to varying degrees elements of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company uses the same credit policies in making commitments and conditional obligations as it does for on balance sheet instruments.

The contractual amounts of financial instruments with off-balance sheet risk are as follows:

	September 30, 2023				December 31, 2022
	Fixed Rate		Variable Rate		Fixed Rate		Variable Rate
	(In thousands)
Commitments to extend credit(1)	$	432,498	$	1,454,648	$	673,098	$	1,686,627
Standby letters of credit	14,507		23,249		10,310		25,190
Total	$	447,005	$	1,477,897	$	683,408	$	1,711,817

1)    At September 30, 2023 and December 31, 2022, the Company had FHLB Letters of Credit in the amount of $1.22 billion and $1.08 billion, respectively, pledged as collateral for public and other deposits of state and local government agencies. For more information on FHLB borrowings, see Note 10 – Borrowings and Borrowing Capacity.

Commitments to Extend Credit

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being fully drawn upon, the total commitment amounts disclosed do not necessarily represent future cash funding requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The Company minimizes its exposure to loss under these commitments by subjecting them to credit approval and monitoring procedures. Management assesses the credit risk associated with certain commitments to extend credit in determining the level of the allowance for credit losses. The amount and type of collateral, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the customer.

Commitments to make loans are generally made for an approval period of 120 days or fewer. As of September 30, 2023, the fixed rate loan commitments had interest rates ranging from 1.70% to 13.50% with a weighted average maturity and rate of 2.46 years and 6.28%, respectively.

Standby Letters of Credit

Standby letters of credit are written conditional commitments issued by the Company to guarantee the performance of a customer to a third party. In the event of nonperformance by the customer, the Company has the rights to the underlying collateral. The credit risk to the Company in issuing letters of credit is substantially similar to that involved in extending loan facilities to its customers. The Company’s policy for obtaining collateral, and the nature of such collateral, is substantially similar to that involved in making commitments to extend credit.

Litigation

The Company is subject to claims and lawsuits which arise primarily in the ordinary course of business. Based on information presently available and advice received from legal counsel representing the Company, it is the opinion of management that the disposition or ultimate determination of such claims and lawsuits will not have a material adverse effect on the financial position or results of operations of the Company.

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REGULATORY CAPITAL MATTERS

9 Months Ended

Sep. 30, 2023

Regulatory Capital Matters [Abstract]

REGULATORY CAPITAL MATTERS

REGULATORY CAPITAL MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Capital adequacy guidelines, and for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities and certain off balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk weightings and other factors. Failure to meet minimum capital requirements can cause regulators to initiate actions that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. The final rules implementing Basel Committee on Banking Supervision's capital guideline for U.S. Banks (Basel III Rules) were fully phased in when the capital conservation buffer reached 2.5%. Management believes as of September 30, 2023 and December 31, 2022, the Company and the Bank met all capital adequacy requirements to which they were then subject.

Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If less than well capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required.

The following is a summary of the Company’s and the Bank’s actual and required capital ratios as of September 30, 2023 and December 31, 2022:

	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required Plus Capital Conservation Buffer				To Be Categorized As Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
STELLAR BANCORP, INC.
(Consolidated)
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,201,404	13.42	%	$	716,402	8.00	%	$	940,278	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	997,556		11.14	%	402,976		4.50	%	626,852		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	1,007,454		11.25	%	537,302		6.00	%	761,177		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	1,007,454		9.82	%	410,344		4.00	%	410,344		4.00	%	N/A		N/A
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,092,618	12.39	%	$	705,765	8.00	%	$	926,317	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	885,652		10.04	%	396,993		4.50	%	617,545		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	895,520		10.15	%	529,324		6.00	%	749,876		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	895,520		8.55	%	418,720		4.00	%	418,720		4.00	%	N/A		N/A
STELLAR BANK
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,174,693	13.13	%	$	715,650	8.00	%	$	939,290	10.50	%	$	894,562	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	1,040,743		11.63	%	402,553		4.50	%	626,193		7.00	%	581,465		6.50	%
Tier 1 Capital (to risk-weighted     assets)	1,040,743		11.63	%	536,737		6.00	%	760,378		8.50	%	715,650		8.00	%
Tier 1 Leverage (to average tangible     assets)	1,040,743		10.15	%	409,957		4.00	%	409,957		4.00	%	512,446		5.00	%
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,059,313	12.02	%	$	705,120	8.00	%	$	925,470	10.50	%	$	881,400	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	921,714		10.46	%	396,630		4.50	%	616,980		7.00	%	572,910		6.50	%
Tier 1 Capital (to risk-weighted     assets)	921,714		10.46	%	528,840		6.00	%	749,190		8.50	%	705,120		8.00	%
Tier 1 Leverage (to average tangible     assets)	921,714		8.81	%	418,388		4.00	%	418,388		4.00	%	522,984		5.00	%

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EARNINGS PER COMMON SHARE

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE

Diluted earnings per common share is computed using the weighted-average number of common shares determined for the basic earnings per common share computation plus the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock using the treasury stock method. Outstanding stock options issued by the Company represent the only dilutive effect reflected in diluted weighted average shares. Restricted shares and performance share awards are considered outstanding at the date of grant, accounted for as participating securities and included in basic and diluted weighted average common shares outstanding.

	Three Months Ended September 30,								Nine Months Ended September 30,
	2023				2022				2023				2022
	Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount
	(Amounts in thousands, except per share data)
Net income attributable to shareholders	$	30,908			$	14,286			$	103,231			$	49,380
Basic:
Weighted average shares outstanding	53,313		$	0.58	28,286		$	0.51	53,211		$	1.94	28,679		$	1.72
Diluted:
Add incremental shares for:
Dilutive effect of stock option exercises and performance share units	67				244				89				222
Total	53,380		$	0.58	28,530		$	0.50	53,300		$	1.94	28,901		$	1.71

There were 28,372 and no antidilutive shares as of September 30, 2023 and 2022, respectively.

The basic and diluted weighted average number of shares issued and earnings per share have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of Allegiance common stock in the Merger.

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 30,908	$ 14,286	$ 103,231	$ 49,380

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Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation-The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and in accordance with guidance provided by the Securities and Exchange Commission (“SEC”). Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis, and all such adjustments are of a normal recurring nature. Transactions between Stellar and the Bank have been eliminated. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

Merger of Equals-The merger of equals (the “Merger”) between Allegiance Bancshares, Inc. (“Allegiance”) and CBTX, Inc. (“CBTX”), was effective on October 1, 2022, with CBTX as the surviving corporation that was renamed Stellar Bancorp, Inc. At the effective time of the Merger, each outstanding share of Allegiance common stock, par value of $1.00 per share, was converted into the right to receive 1.4184 shares of common stock of the Company. Immediately following the Merger, CommunityBank of Texas, N.A. (“CommunityBank”), a national banking association and a wholly-owned subsidiary of CBTX, merged with and into Allegiance Bank, a wholly owned subsidiary of Allegiance, with Allegiance Bank as the surviving bank. Allegiance Bank changed its name to Stellar Bank on February 18, 2023 in connection with the operational conversion.

The Merger constituted a business combination and was accounted for as a reverse merger using the acquisition method of accounting. As a result, Allegiance was the accounting acquirer and CBTX was the legal acquirer and the accounting acquiree. Accordingly, the historical financial statements of Allegiance became the historical financial statements of the combined company for all periods prior to October 1, 2022 (the “Merger Date”). In addition, the assets and liabilities of CBTX have been recorded at their estimated fair values and added to those of Allegiance as of October 1, 2022. The determination of fair value required management to make estimates about discount rates, expected future cash flows, market conditions and other future events that are subjective.

The Company’s results of operations for the three and nine months ended September 30, 2022 reflect Allegiance's historical results and do not include the historical results of CBTX. The Merger had a significant impact on all aspects of the Company’s financial statements, and financial results for periods after the Merger are not comparable to financial results for periods prior to the Merger. The number of shares issued and outstanding, earnings per share, capital surplus, dividends paid and all references to share quantities of the Company have been retrospectively adjusted to reflect the equivalent number of shares issued to holders of

Allegiance common stock in the Merger. See Note 2 – Acquisitions in the accompanying notes to the consolidated financial statements for the impact of the Merger.

Adoption of New Accounting Standards

Adoption of New Accounting StandardsASU 2022-02, "Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." became effective for the Company for the first quarter of 2023 and did not have a significant impact on the Company’s financial statements. ASU 2022-02 eliminates the troubled debt restructuring ("TDR") accounting model for creditors that have already adopted Topic 326, which is commonly referred to as the current expected credit loss model. In lieu of the TDR accounting model, the Company applies the general loan modification guidance in Subtopic 310-20 to all loan modifications, including modifications made for borrowers experiencing financial difficulty on a prospective basis. Under the general loan modification guidance, a modification is treated as a new loan only if the following two conditions are met: (1) the terms of the new loan are at least as favorable to the lender as the terms for comparable loans to other customers with similar collection risks; and (2) modifications to the terms of the original loan are more than minor. If either condition is not met, the modification is accounted for as the continuation of the old loan with any effect of the modification treated as a prospective adjustment to the loan’s effective interest rate.

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ACQUISITIONS (Tables)

9 Months Ended

Sep. 30, 2023

Business Combination and Asset Acquisition [Abstract]

Schedule of Business Acquisitions, by Acquisition

The table below summarizes the ownership of the combined company following the Merger, for each shareholder group, using shares of CBTX and Allegiance common stock outstanding at September 30, 2022 and Allegiance’s closing price on September 30, 2022 (shares in thousands).

	Stellar Bancorp, Inc. Ownership
	Number of CBTX Outstanding Shares	Percentage Ownership
CBTX shareholders	24,015	46.0	%
Allegiance shareholders	28,137	54.0	%
Total	52,152	100.0	%

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

Changes in the carrying amount of the Company’s goodwill and core deposit intangible assets were as follows:

	Goodwill		Core Deposit Intangibles		Servicing Assets
	(In thousands)
Balance as of December 31, 2021	$	223,642	$	14,658	$	—
Acquired intangibles	273,618		138,150		329
Amortization	—		(9,283)		(20)
Balance as of December 31, 2022	497,260		143,525		309
Amortization	—		(20,581)		(55)
Measurement period adjustment	58		—		—
Decrease due to payoff of serviced loans	—		—		(27)
Balance as of September 30, 2023	$	497,318	$	122,944	$	227

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated aggregate future amortization expense for core deposit intangible assets remaining as of September 30, 2023 is as follows (in thousands):

Remaining 2023	$	6,232
2024	24,166
2025	21,528
2026	18,896
Thereafter	52,122
Total	$	122,944

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SECURITIES (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities

The amortized cost and fair value of investment securities were as follows:

	September 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	409,152	$	129	$	(15,873)	$	393,408
Municipal securities	258,901		545		(40,330)		219,116
Agency mortgage-backed pass-through securities	378,573		22		(50,401)		328,194
Agency collateralized mortgage obligations	444,234		—		(78,356)		365,878
Corporate bonds and other	122,812		29		(14,485)		108,356
Total	$	1,613,672	$	725	$	(199,445)	$	1,414,952

	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Available for Sale
U.S. government and agency securities	$	433,417	$	90	$	(19,227)	$	414,280
Municipal securities	580,076		4,319		(43,826)		540,569
Agency mortgage-backed pass-through securities	370,471		362		(42,032)		328,801
Agency collateralized mortgage obligations	461,760		—		(67,630)		394,130
Corporate bonds and other	143,192		2		(13,388)		129,806
Total	$	1,988,916	$	4,773	$	(186,103)	$	1,807,586

Investments Classified by Contractual Maturity Date

The amortized cost and fair value of investment securities at September 30, 2023, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations at any time with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	77,562	$	77,026
Due after one year through five years	185,518		174,016
Due after five years through ten years	141,625		125,892
Due after ten years	386,160		343,946
Subtotal	790,865		720,880
Agency mortgage-backed pass-through securities     and collateralized mortgage obligations	822,807		694,072
Total	$	1,613,672	$	1,414,952

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

Securities with unrealized losses segregated by length of time such securities have been in a continuous loss position are as follows:

	September 30, 2023
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	111,573	$	(3,328)	$	261,872	$	(12,545)	$	373,445	$	(15,873)
Municipal securities	18,062		(640)		166,011		(39,690)		184,073		(40,330)
Agency mortgage-backed     pass-through securities	79,012		(3,829)		248,186		(46,572)		327,197		(50,401)
Agency collateralized mortgage     obligations	13,881		(168)		351,996		(78,188)		365,878		(78,356)
Corporate bonds and other	11,314		(1,249)		81,556		(13,236)		92,870		(14,485)
Total	$	233,842	$	(9,214)	$	1,109,621	$	(190,231)	$	1,343,463	$	(199,445)

	December 31, 2022
	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In thousands)
Available for Sale
U.S. government and agency     securities	$	99,732	$	(1,427)	$	305,256	$	(17,800)	$	404,988	$	(19,227)
Municipal securities	228,192		(14,473)		134,640		(29,353)		362,832		(43,826)
Agency mortgage-backed      pass-through securities	95,291		(7,612)		199,836		(34,420)		295,127		(42,032)
Agency collateralized mortgage      obligations	117,147		(14,426)		276,925		(53,204)		394,072		(67,630)
Corporate bonds and other	72,913		(5,704)		49,893		(7,684)		122,806		(13,388)
Total	$	613,275	$	(43,642)	$	966,550	$	(142,461)	$	1,579,825	$	(186,103)

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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)

9 Months Ended

Sep. 30, 2023

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

The loan portfolio balances, net of unearned income and fees, consist of various types of loans primarily made to borrowers located within Texas and are segregated by class of loan as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Commercial and industrial	$	1,474,600	$	1,455,795
Paycheck Protection Program (PPP)	5,968		13,226
Real estate:
Commercial real estate (including multi-family residential)	4,076,606		3,931,480
Commercial real estate construction and land development	1,078,265		1,037,678
1-4 family residential (including home equity)	1,024,945		1,000,956
Residential construction	289,553		268,150
Consumer and other	54,591		47,466
Total loans	8,004,528		7,754,751
Allowance for credit losses on loans	(93,575)		(93,180)
Loans, net	$	7,910,953	$	7,661,571

Financing Receivable Credit Quality Indicators

The following table presents risk ratings by category and the gross charge-offs by primary loan type and year of origination or renewal. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of September 30, 2023 and December 31, 2022:

	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans		Total		Total
	2023		2022		2021		2020		2019		Prior
	(In thousands)
Commercial and industrial
Pass	$	249,626	$	299,874	$	194,032	$	47,217	$	31,150	$	23,062	$	528,399	$	63,180	$	1,436,540	$	1,400,191
Special Mention	2,786		403		508		438		861		—		3,054		102		8,152		18,982
Substandard	1,250		3,925		9,303		1,140		12,131		281		1,057		771		29,858		36,568
Doubtful	—		50		—		—		—		—		—		—		50		54
Total commercial and industrial     loans	$	253,662	$	304,252	$	203,843	$	48,795	$	44,142	$	23,343	$	532,510	$	64,053	$	1,474,600	$	1,455,795
Current period gross charge-offs	$	—	$	130	$	4,264	$	456	$	129	$	—	$	4,143	$	531	$	9,653
Paycheck Protection Program (PPP)
Pass	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Special Mention	—		—		—		—		—		—		—		—		—		—
Substandard	—		—		—		—		—		—		—		—		—		—
Doubtful	—		—		—		—		—		—		—		—		—		—
Total PPP loans	$	—	$	—	$	3,218	$	2,750	$	—	$	—	$	—	$	—	$	5,968	$	13,226
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate     (including multi-family residential)
Pass	$	366,601	$	1,327,957	$	863,078	$	467,867	$	348,105	$	480,980	$	128,848	$	11,052	$	3,994,488	$	3,844,951
Special Mention	934		508		7,756		8,409		1,716		12,414		305		—		32,042		18,183
Substandard	3,906		5,050		16,003		6,832		5,009		12,890		286		100		50,076		68,346
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     (including multi-family     residential) loans	$	371,441	$	1,333,515	$	886,837	$	483,108	354830		$	506,284	$	129,439	$	11,152	$	4,076,606	$	3,931,480
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate construction     and land development
Pass	$	211,096	$	518,943	$	227,438	$	29,351	$	9,689	$	6,189	$	58,463	$	693	$	1,061,862	$	1,025,141
Special Mention	—		2,222		2,062		139		—		202		—		—		4,625		832
Substandard	22		1,016		10,406		88		80		17		—		149		11,778		11,705
Doubtful	—		—		—		—		—		—		—		—		—		—
Total commercial real estate     construction and land development	$	211,118	$	522,181	$	239,906	$	29,578	$	9,769	$	6,408	$	58,463	$	842	$	1,078,265	$	1,037,678
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—

	September 30, 2023																		December 31, 2022
	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans		Revolving Loans Converted to Term Loans
	2023		2022		2021		2020		2019		Prior						Total		Total
	(In thousands)
1-4 family residential (including     home equity)
Pass	$	132,680	$	252,160	$	224,562	$	116,514	$	72,701	$	90,921	$	94,320	$	10,248	$	994,106	$	969,396
Special Mention	499		569		—		1,996		333		195		98		—		3,690		3,714
Substandard	1,940		2,399		3,103		1,468		3,893		4,493		7,071		2,782		27,149		27,846
Doubtful	—		—		—		—		—		—		—		—		—		—
Total 1-4 family residential     (including home equity)	$	135,119	$	255,128	$	227,665	$	119,978	$	76,927	$	95,609	$	101,489	$	13,030	$	1,024,945	$	1,000,956
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	23	$	—	$	—	$	23
Residential construction
Pass	$	116,508	$	136,500	$	6,341	$	4,117	$	658	$	499	$	21,710	$	—	$	286,333	$	266,943
Special Mention	—		634		—		—		—		—		—		—		634		421
Substandard	—		635		1,951		—		—		—		—		—		2,586		786
Doubtful	—		—		—		—		—		—		—		—		—		—
Total residential construction	$	116,508	$	137,769	$	8,292	$	4,117	$	658	$	499	$	21,710	$	—	$	289,553	$	268,150
Current period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Consumer and other
Pass	$	23,489	$	9,146	$	4,130	$	2,005	$	676	$	465	$	13,192	$	901	$	54,004	$	47,062
Special Mention	—		26		—		—		—		—		45		—		71		43
Substandard	—		312		35		—		56		5		4		104		516		361
Doubtful	—		—		—		—		—		—		—		—		—		—
Total consumer and other	$	23,489	$	9,484	$	4,165	$	2,005	$	732	$	470	$	13,241	$	1,005	$	54,591	$	47,466
Current period gross charge-offs	$	—	$	44	$	—	$	—	$	—	$	—	$	1	$	—	$	45
Total loans
Pass	$	1,100,000	$	2,544,580	$	1,522,799	$	669,821	$	462,979	$	602,116	$	844,932	$	86,074	$	7,833,301	$	7,566,910
Special Mention	4,219		4,362		10,326		10,982		2,910		12,811		3,502		102		49,214		42,175
Substandard	7,118		13,337		40,801		9,528		21,169		17,686		8,418		3,906		121,963		145,612
Doubtful	—		50		—		—		—		—		—		—		50		54
Total loans	$	1,111,337	$	2,562,329	$	1,573,926	$	690,331	$	487,058	$	632,613	$	856,852	$	90,082	$	8,004,528	$	7,754,751
Current period gross charge-offs	$	—	$	174	$	4,264	$	456	$	129	$	23	$	4,144	$	531	$	9,721

Past Due Financing Receivables

An aging analysis of the recorded investment in past due loans, segregated by class of loans, is included below. The Company defines recorded investment as the outstanding loan balances including net deferred loan fees, and excluding accrued interest receivable of $36.4 million and $34.1 million as of September 30, 2023 and December 31, 2022, respectively, due to immateriality.

	September 30, 2023
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	3,535	$	—	$	3,535	$	14,971	$	1,456,094	$	1,474,600
Paycheck Protection Program (PPP)	85		—		85		20		5,863		5,968
Real estate:
Commercial real estate (including      multi-family residential)	19,649		—		19,649		13,563		4,043,394		4,076,606
Commercial real estate construction     and land development	4,405		—		4,405		170		1,073,690		1,078,265
1-4 family residential (including     home equity)	4,742		—		4,742		8,442		1,011,761		1,024,945
Residential construction	3,389		—		3,389		635		285,529		289,553
Consumer and other	215		—		215		490		53,886		54,591
Total loans	$	36,020	$	—	$	36,020	$	38,291	$	7,930,217	$	8,004,528

	December 31, 2022
	Loans Past Due and Still Accruing						Nonaccrual Loans		Current Loans		Total Loans
	30-89 Days		90 or More Days		Total Past Due Loans
	(In thousands)
Commercial and industrial	$	1,591	$	—	$	1,591	$	25,297	$	1,428,907	$	1,455,795
Paycheck Protection Program (PPP)	517		—		517		105		12,604		13,226
Real estate:
Commercial real estate (including     multi-family residential)	3,222		—		3,222		9,970		3,918,288		3,931,480
Commercial real estate construction     and land development	851		—		851		—		1,036,827		1,037,678
1-4 family residential (including     home equity)	3,385		—		3,385		9,404		988,167		1,000,956
Residential construction	—		—		—		—		268,150		268,150
Consumer and other	192		—		192		272		47,002		47,466
Total loans	$	9,758	$	—	$	9,758	$	45,048	$	7,699,945	$	7,754,751

Allowance for Credit Losses on Financing Receivables

The following table presents the activity in the allowance for credit losses on loans by portfolio type for the three and nine months ended September 30, 2023 and 2022:

	Commercial and industrial		Paycheck Protection Program (PPP)		Commercial real estate (including multi-family residential)		Commercial real estate construction and land development		1-4 family residential (including home equity)		Residential construction		Consumer and other		Total
	(In thousands)
Allowance for credit losses on     loans:
Three Months Ended
Balance June 30, 2023	$	38,505	$	—	$	38,963	$	14,500	$	4,757	$	3,080	$	390	$	100,195
Provision for credit losses on loans	2,173		—		58		(791)		34		(221)		243		1,496
Charge-offs	(8,169)		—		—		—		—		—		(7)		(8,176)
Recoveries	55		—		2		—		—		—		3		60
Net charge-offs	(8,114)		—		2		—		—		—		(4)		(8,116)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Nine Months Ended
Balance December 31, 2022	$	41,236	$	—	$	32,970	$	14,121	$	2,709	$	1,796	$	348	$	93,180
Provision for credit losses on loans	(143)		—		6,037		(412)		2,096		1,063		298		8,939
Charge-offs	(9,653)		—		—		—		(23)		—		(45)		(9,721)
Recoveries	1,124		—		16		—		9		—		28		1,177
Net charge-offs	(8,529)		—		16		—		(14)		—		(17)		(8,544)
Balance September 30, 2023	$	32,564	$	—	$	39,023	$	13,709	$	4,791	$	2,859	$	629	$	93,575
Three Months Ended
Balance June 30, 2022	$	16,701	$	—	$	24,000	$	7,399	$	1,036	$	1,048	$	58	$	50,242
Provision for credit losses on loans	(1,091)		—		1,606		952		(9)		188		14		1,660
Charge-offs	(2)		—		(56)		—		—		—		(17)		(75)
Recoveries	319		—		—		—		—		—		1		320
Net recoveries	317		—		(56)		—		—		—		(16)		245
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147
Nine Months Ended
Balance December 31, 2021	$	16,629	$	—	$	23,143	$	6,263	$	847	$	975	$	83	$	47,940
Provision for credit losses on loans	(464)		—		2,740		2,096		180		261		37		4,850
Charge-offs	(958)		—		(383)		(63)		—		—		(65)		(1,469)
Recoveries	720		—		50		55		—		—		1		826
Net charge-offs	(238)		—		(333)		(8)		—		—		(64)		(643)
Balance September 30, 2022	$	15,927	$	—	$	25,550	$	8,351	$	1,027	$	1,236	$	56	$	52,147

Summary of Amortized Cost Basis of Collateral Dependent Loans Individually Evaluated to Determine Expected Credit Losses

The following tables present the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses as of September 30, 2023 and December 31, 2022:

	September 30, 2023
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	7,476	$	—	$	7,476
Real estate:
Commercial real estate (including multi-family residential)	3,411		—		—		3,411
Commercial real estate construction and land development			—		—		—
1-4 family residential (including home equity)	—		—		—		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	3,411	$	7,476	$	—	$	10,887

	December 31, 2022
	Real Estate		Business Assets		Other		Total
	(In thousands)
Commercial and industrial	$	—	$	18,411	$	30	$	18,441
Real estate:
Commercial real estate (including multi-family residential)	1,612		—		—		1,612
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	3,478		—		—		3,478
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
Total	$	5,090	$	18,411	$	30	$	23,531

Summary of Nonaccrual Loans

The following tables present additional information regarding nonaccrual loans. No interest income was recognized on nonaccrual loans as of September 30, 2023 and December 31, 2022.

	September 30, 2023
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	10,337	$	4,634	$	14,971
Paycheck Protection Program (PPP)	20		—		20
Real estate:
Commercial real estate (including multi-family residential)	10,820		2,743		13,563
Commercial real estate construction and land development	170		—		170
1-4 family residential (including home equity)	6,849		1,593		8,442
Residential construction	635		—		635
Consumer and other	81		409		490
Total loans	$	28,912	$	9,379	$	38,291

	December 31, 2022
	Nonaccrual Loans with No Related Allowance		Nonaccrual Loans with Related Allowance		Total Nonaccrual Loans
	(In thousands)
Commercial and industrial	$	2,776	$	22,521	$	25,297
Paycheck Protection Program (PPP)	105		—		105
Real estate:
Commercial real estate (including multi-family residential)	8,704		1,266		9,970
Commercial real estate construction and land development	—		—		—
1-4 family residential (including home equity)	4,856		4,548		9,404
Residential construction	—		—		—
Consumer and other	94		178		272
Total loans	$	16,535	$	28,513	$	45,048

Troubled Debt Restructurings on Financing Receivables

The following tables present information regarding loans that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

		Three Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Real estate:
Commercial real estate (including     multi-family residential)		—		1,890		—		—		—		—		1,890
Commercial real estate construction and land development		—				—		—		—		—		—
1-4 family residential (including home equity)		—		322		99		—		—		71		492
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		—		—		—		—		—		—
Total		$	—	$	2,212	$	—	$	—	$	—	$	71	$	2,382

		Nine Months Ended September 30, 2023
		Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness		Combination Term Extension and Principal Forgiveness		Combination Term Extension and Payment Delay		Total
	(In thousands)
Commercial and industrial		$	89	$	2,185	$	—	$	—	$	—	$	260	$	2,534
Real estate:
Commercial real estate (including multi-family residential)		—		2,670		—		—		—		1,703		4,373
Commercial real estate construction and land development		—		6,850		—		—		—		—		6,850
1-4 family residential (including home equity)		—		1,037		99		—		—		71		1,207
Residential construction		—		—		—		—		—		—		—
Consumer and other		—		94		—		—		—		—		94
Total		$	89	$	12,836	$	99	$	—	$	—	$	2,034	$	15,058

The following table summarizes, by loan portfolio, the financial effect of the Company's loan modifications for the three and nine months ended September 30, 2023:

	Three Months Ended September 30, 2023			Nine Months Ended September 30, 2023
	Weighted Average Interest Rate Reduction		Weighted Average Term Extension	Weighted Average Interest Rate Reduction		Weighted Average Term Extension
			(months)			(months)
Commercial and industrial	—	%	—	2.0	%	12
Real estate:
Commercial real estate (including multi-family residential)	—	%	6	—	%	9
Commercial real estate construction and land development	—	%	—	—	%	12
1-4 family residential (including home equity)	1.5	%	24	1.5	%	16
Residential construction	—	%	—	—	%	—
Consumer and other	—	%	—	—	%	7

The following table summarizes loans that had a payment default within the past twelve months that were modified due to the borrowers experiencing financial difficulty during the three and nine months ended September 30, 2023:

	Interest Rate Reduction		Term Extension		Payment Delay		Principal forgiveness
	(In thousands)
Commercial and industrial	$	89	$	670	$	—	$	—
Real estate:
Commercial real estate (including multi-family residential)	—		—		—		—
Commercial real estate construction and land development	—		—		—		—
1-4 family residential (including home equity)	—		715		99		—
Residential construction	—		—		—		—
Consumer and other	—		—		—		—
	$	89	$	1,385	$	99	$	—

The following table presents information regarding loans modified in a troubled debt restructuring during the three and nine months ended September 30, 2022:

	Three Months Ended September 30, 2022					Nine Months Ended September 30, 2022
	Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment		Number of Contracts	Pre-modifications of Outstanding Recorded Investment		Post-modifications of Outstanding Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Commercial and industrial	1	$	224	$	224	4	$	768	$	768
Real estate:
Commercial real estate (including multi-family residential)	—	—		—		4	1,207		1,207
Consumer and other	1	45		45		1	45		45
Total	2	$	269	$	269	9	$	2,020	$	2,020

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LEASES (Tables)

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Supplemental Lease Information

Supplemental lease information at the dates indicated is as follows:

	September 30, 2023			December 31, 2022
	(Dollars in thousands)
Balance Sheet:
Operating lease right of use asset classified as premises and equipment	$	20,483		$	23,538
Operating lease liability classified as other liabilities	$	20,225		$	23,136
Weighted average lease term, in years	7.91			8.18
Weighted average discount rate	4.14		%	4.00		%

Summary of Lease Costs

Lease costs for the dates indicated is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(In thousands)
Income Statement:
Operating lease cost	$	1,885	$	836	$	5,280	$	2,559
Short-term lease cost	8		—		21		—
Total operating lease costs	$	1,893	$	836	$	5,301	$	2,559

Maturity Analysis of Lease Liabilities

A maturity analysis of the Company’s lease liabilities is as follows:

	September 30, 2023		December 31, 2022
	(In thousands)
Lease payments due:
Within one year	$	1,171	$	4,634
After one but within two years	4,137		4,121
After two but within three years	3,681		3,684
After three but within four years	3,125		3,132
After four but within five years	2,914		2,918
After five years	9,279		9,303
Total lease payments	24,307		27,792
Less: discount on cash flows	4,082		4,656
Total lease liability	$	20,225	$	23,136

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FAIR VALUE (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

The carrying amounts and estimated fair values of financial instruments that are reported on the balance sheet are as follows:

	September 30, 2023
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	302,272	$	302,272	$	—	$	—	$	302,272
Available for sale securities	1,414,952		—		1,414,952		—		1,414,952
Loans held for investment, net of allowance	7,910,953		—		—		7,615,073		7,615,073
Accrued interest receivable	43,536		176		6,947		36,413		43,536
Financial liabilities
Deposits	$	8,686,621	$	—	$	8,677,026	$	—	$	8,677,026
Accrued interest payable	7,612		—		7,612		—		7,612
Borrowed funds	323,981		—		323,998		—		323,998
Subordinated debt	109,665		—		107,469		—		107,469

	December 31, 2022
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Cash and cash equivalents	$	371,705	$	371,705	$	—	$	—	$	371,705
Available for sale securities	1,807,586		—		1,807,586		—		1,807,586
Loans held for investment, net of allowance	7,661,571		—		—		7,555,602		7,555,602
Accrued interest receivable	44,743		25		10,585		34,133		44,743
Financial liabilities
Deposits	$	9,267,632	$	—	$	9,256,141	$	—	$	9,256,141
Accrued interest payable	2,098		—		2,098		—		2,098
Borrowed funds	63,925		—		63,999		—		63,999
Subordinated debt	109,367		—		107,910		—		107,910

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables present fair values for assets and liabilities measured at fair value on a recurring basis. There were no liabilities measured at fair value on a recurring basis as of September 30, 2023.

	September 30, 2023
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	393,408	$	—	$	393,408
Municipal securities	—		219,116		—		219,116
Agency mortgage-backed pass-through securities	—		328,194		—		328,194
Agency collateralized mortgage obligations	—		365,878		—		365,878
Corporate bonds and other	—		108,356		—		108,356
Interest rate swaps	—		—		10,218		10,218
Credit risk participation agreements	—		—		10		10
Total fair value of financial assets	$	—	$	1,414,952	$	10,228	$	1,425,180
Financial liabilities
Interest rate swaps	$	—	$	—	$	10,218	$	10,218
Total fair value of financial liabilities	$	—	$	—	$	10,218	$	10,218

	December 31, 2022
	Level 1		Level 2		Level 3		Total
	(In thousands)
Financial assets
Available for sale securities:
U.S. government and agency securities	$	—	$	414,280	$	—	$	414,280
Municipal securities	—		540,569		—		540,569
Agency mortgage-backed pass-through securities	—		328,801		—		328,801
Agency collateralized mortgage obligations	—		394,130		—		394,130
Corporate bonds and other	—		129,806		—		129,806
Interest rate swaps	—		—		9,263		9,263
Credit risk participation agreements	—		—		27		27
Total fair value of financial assets	$	—	$	1,807,586	$	9,290	$	1,816,876
Financial liabilities
Interest rate swaps	$	—	$	—	$	9,263	$	9,263
Total fair value of financial liabilities	$	—	$	—	$	9,263	$	9,263

Fair Value Measurements, Nonrecurring

Assets measured at fair value on a nonrecurring basis are summarized in the table below. There were no liabilities measured at fair value on a nonrecurring basis at September 30, 2023 and December 31, 2022.

	September 30, 2023
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	13,830
Commercial real estate (including multi-family residential)	—		—		7,706
Commercial real estate construction and land development	—		—		6,654
1-4 family residential (including home equity)	—		—		2,776
Consumer and other	—		—		88
Branch assets held for sale	5,852		—		—
	$	5,852	$	—	$	31,054

	December 31, 2022
	Level 1		Level 2		Level 3
	(In thousands)
Loans:
Commercial and industrial	$	—	$	—	$	21,948
Commercial real estate (including multi-family residential)	—		—		11,566
1-4 family residential (including home equity)	—		—		2,883
Branch assets held for sale	5,165		—		—
	$	5,165	$	—	$	36,397

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DEPOSITS (Tables)

9 Months Ended

Sep. 30, 2023

Deposit Liabilities [Abstract]

Schedule of Maturities of Time Deposits

Scheduled maturities of time deposits for the next five years are as follows (in thousands):

Within one year	$	1,399,265
After one but within two years	85,040
Over three years	19,586
Total	$	1,503,891

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DERIVATIVE INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives Not Designated as Hedging Instruments

Derivative instruments not designated as hedges outstanding as of September 30, 2023 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	110,946	$	9,758	3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Financial institutions	Other assets	4,940		460		4.99%	U.S. Prime	4.21
Customers	Other liabilities	4,940		(460)		4.99%	U.S. Prime	4.21
Customers	Other liabilities	110,946		(9,758)		3.25% - 6.25%	SOFR CME 1M + 2.50% - 3.00%	4.74
Credit risk participations:
Financial institutions	Other assets	20,958		10		3.50% - 5.40%	SOFR CME 1M + 2.50%	7.58

Derivative instruments not designated as hedges outstanding as of December 31, 2022 were as follows (dollars in thousands):

								Weighted
								Average
		Notional		Fair				Maturity
	Classification	Amounts		Value		Fixed Rate	Floating Rate	(Years)
Interest rate swaps:
Financial institutions	Other assets	$	109,242	$	8,856	3.25% - 5.58%	SOFR CME 1M + 2.50% - 3.00%	5.49
Financial institutions	Other assets	5,029		407		4.99%	U.S. Prime	4.96
Customers	Other liabilities	5,029		(407)		4.99%	U.S. Prime	4.96
Customers	Other liabilities	109,242		(8,856)		3.25% - 5.58%	SOFR CME 1M + 2.50%	5.49
Credit risk participations:
Financial institutions	Other assets	13,028		2		3.50%	LIBOR 1M + 2.50%	7.24
Financial institutions	Other assets	8,485		25		5.35% - 5.40%	SOFR CME 1M + 2.50%	9.97

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SUBORDINATED DEBT (Tables)

9 Months Ended

Sep. 30, 2023

Subordinated Borrowings [Abstract]

Schedule of Subordinated Borrowing

A summary of pertinent information related to the Company’s issues of junior subordinated debentures outstanding at September 30, 2023 is set forth in the table below:

Description	Issuance Date	Trust Preferred Securities Outstanding		Interest Rate	Junior Subordinated Debt Owed to Trusts		Maturity Date(1)
(Dollars in thousands)
Farmers & Merchants Capital Trust II	November 13, 2003	$	7,500	3-Month SOFR + 3.26%	$	7,732	November 8, 2033
Farmers & Merchants Capital Trust III	June 30, 2005	3,500		3-Month SOFR + 2.06%	3,609		July 7, 2035
					$	11,341

(1) All debentures are currently callable.

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INCOME TAXES (Tables)

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The amount of the Company’s federal and state income tax expense is influenced by the amount of pre-tax income, the amount of tax-exempt income and the amount of other nondeductible items.

	Three Months Ended						Nine Months Ended
	September 30, 2023			September 30, 2022			September 30, 2023			September 30, 2022
Income tax expense	$	7,445		$	3,406		$	24,825		$	11,310
Effective income tax rate	19.4		%	19.3		%	19.4		%	18.6		%

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STOCK BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of the activity in the stock option plans during the nine months ended September 30, 2023 is set forth below:

	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(Shares in thousands)			(In years)	(Dollars in thousands)
Options outstanding, January 1, 2023	368	$	17.89	2.72	$	4,256
Options granted	—	—
Options exercised	(49)	14.19
Options forfeited	(36)	20.67
Options outstanding, September 30, 2023	283	$	18.18	2.17	$	1,036
Options vested and exercisable, September 30, 2023	283	$	18.18	2.17	$	1,036

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of the activity of the nonvested shares of restricted stock during the nine months ended September 30, 2023 is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
	(Shares in thousands)
Nonvested share awards outstanding, January 1, 2023	501	$	32.84
Share awards granted	262	25.67
Share awards vested	(14)	25.99
Unvested share awards forfeited or cancelled	(64)	31.03
Nonvested share awards outstanding, September 30, 2023	685	30.41

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OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES (Tables)

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of Fair Value, Off-balance Sheet Risks

The contractual amounts of financial instruments with off-balance sheet risk are as follows:

	September 30, 2023				December 31, 2022
	Fixed Rate		Variable Rate		Fixed Rate		Variable Rate
	(In thousands)
Commitments to extend credit(1)	$	432,498	$	1,454,648	$	673,098	$	1,686,627
Standby letters of credit	14,507		23,249		10,310		25,190
Total	$	447,005	$	1,477,897	$	683,408	$	1,711,817

1)    At September 30, 2023 and December 31, 2022, the Company had FHLB Letters of Credit in the amount of $1.22 billion and $1.08 billion, respectively, pledged as collateral for public and other deposits of state and local government agencies. For more information on FHLB borrowings, see Note 10 – Borrowings and Borrowing Capacity.

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REGULATORY CAPITAL MATTERS (Tables)

9 Months Ended

Sep. 30, 2023

Regulatory Capital Matters [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following is a summary of the Company’s and the Bank’s actual and required capital ratios as of September 30, 2023 and December 31, 2022:

	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required Plus Capital Conservation Buffer				To Be Categorized As Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
STELLAR BANCORP, INC.
(Consolidated)
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,201,404	13.42	%	$	716,402	8.00	%	$	940,278	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	997,556		11.14	%	402,976		4.50	%	626,852		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	1,007,454		11.25	%	537,302		6.00	%	761,177		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	1,007,454		9.82	%	410,344		4.00	%	410,344		4.00	%	N/A		N/A
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,092,618	12.39	%	$	705,765	8.00	%	$	926,317	10.50	%	N/A		N/A
Common Equity Tier 1 Capital (to     risk-weighted assets)	885,652		10.04	%	396,993		4.50	%	617,545		7.00	%	N/A		N/A
Tier 1 Capital (to risk-weighted     assets)	895,520		10.15	%	529,324		6.00	%	749,876		8.50	%	N/A		N/A
Tier 1 Leverage (to average tangible     assets)	895,520		8.55	%	418,720		4.00	%	418,720		4.00	%	N/A		N/A
STELLAR BANK
September 30, 2023
Total Capital (to risk-weighted     assets)	$	1,174,693	13.13	%	$	715,650	8.00	%	$	939,290	10.50	%	$	894,562	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	1,040,743		11.63	%	402,553		4.50	%	626,193		7.00	%	581,465		6.50	%
Tier 1 Capital (to risk-weighted     assets)	1,040,743		11.63	%	536,737		6.00	%	760,378		8.50	%	715,650		8.00	%
Tier 1 Leverage (to average tangible     assets)	1,040,743		10.15	%	409,957		4.00	%	409,957		4.00	%	512,446		5.00	%
December 31, 2022
Total Capital (to risk-weighted     assets)	$	1,059,313	12.02	%	$	705,120	8.00	%	$	925,470	10.50	%	$	881,400	10.00	%
Common Equity Tier 1 Capital (to     risk-weighted assets)	921,714		10.46	%	396,630		4.50	%	616,980		7.00	%	572,910		6.50	%
Tier 1 Capital (to risk-weighted     assets)	921,714		10.46	%	528,840		6.00	%	749,190		8.50	%	705,120		8.00	%
Tier 1 Leverage (to average tangible     assets)	921,714		8.81	%	418,388		4.00	%	418,388		4.00	%	522,984		5.00	%

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EARNINGS PER COMMON SHARE (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three Months Ended September 30,								Nine Months Ended September 30,
	2023				2022				2023				2022
	Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount		Amount		Per Share Amount
	(Amounts in thousands, except per share data)
Net income attributable to shareholders	$	30,908			$	14,286			$	103,231			$	49,380
Basic:
Weighted average shares outstanding	53,313		$	0.58	28,286		$	0.51	53,211		$	1.94	28,679		$	1.72
Diluted:
Add incremental shares for:
Dilutive effect of stock option exercises and performance share units	67				244				89				222
Total	53,380		$	0.58	28,530		$	0.50	53,300		$	1.94	28,901		$	1.71

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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES (Details)	Oct. 01, 2022 $ / shares shares	Sep. 30, 2023 office $ / shares	Dec. 31, 2022 $ / shares
New Accounting Pronouncement Early Adoption [Line Items]
Number of offices in which entity operates		55
Common stock, par value (in dollars per share) | $ / shares	$ 1.00	$ 0.01	$ 0.01
Merger, shares consideration received (in shares) | shares	1.4184
Houston Metropolitan
New Accounting Pronouncement Early Adoption [Line Items]
Number of offices in which entity operates		38
Beaumont
New Accounting Pronouncement Early Adoption [Line Items]
Number of offices in which entity operates		16
Dallas
New Accounting Pronouncement Early Adoption [Line Items]
Number of offices in which entity operates		1

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ACQUISITIONS - Schedule of Hypothetical Shares Issued In Merger (Details) - CBTX - CBTX	Sep. 30, 2022 shares
Business Acquisition [Line Items]
Number of shares issued in acquisition (in shares)	52,152,000
Percentage Ownership	100.00%
CBTX shareholders
Business Acquisition [Line Items]
Number of shares issued in acquisition (in shares)	24,015,000
Percentage Ownership	46.00%
Allegiance shareholders
Business Acquisition [Line Items]
Number of shares issued in acquisition (in shares)	28,137,000
Percentage Ownership	54.00%

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ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 01, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Merger, shares consideration received (in shares)	1.4184
Acquisition and merger-related expenses		$ 3,421	$ 10,551	$ 12,483	$ 12,669
CBTX
Business Acquisition [Line Items]
Acquisition and merger-related expenses		$ 3,400	$ 10,600	$ 12,500	$ 12,700
CBTX | Allegiance shareholders
Business Acquisition [Line Items]
Number of shares issued in acquisition (in shares)	28,100,000
Percentage ownership	54.00%

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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill and Intangibles (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill
Balance, beginning		$ 497,260,000		$ 497,260,000	$ 223,642,000
Acquired intangibles		273,618,000
Measurement period adjustment				58,000
Balance, ending	$ 497,318,000			497,318,000
Intangible Assets
Balance, beginning		143,525,000		143,525,000
Amortization	(6,876,000)		$ (750,000)	(20,636,000)	(2,252,000)
Balance, ending	122,944,000			122,944,000
Core Deposit Intangibles
Intangible Assets
Balance, beginning		143,525,000		143,525,000	14,658,000
Acquired intangibles		138,150,000
Amortization		(9,283,000)		(20,581,000)
Measurement period adjustment				0
Balance, ending	122,944,000			122,944,000
Servicing Assets
Intangible Assets
Balance, beginning		309,000		309,000	$ 0
Acquired intangibles		329,000
Amortization		$ (20,000)		(55,000)
Measurement period adjustment				0
Decrease due to payoff of serviced loans				(27,000)
Balance, ending	$ 227,000			$ 227,000

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Measurement period adjustment	$ 58

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GOODWILL AND OTHER INTANGIBLE ASSETS - Estimated Aggregate Future Amortization Expense for Core Deposit Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining 2023	$ 6,232
2024	24,166
2025	21,528
2026	18,896
Thereafter	52,122
Total	$ 122,944	$ 143,525

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SECURITIES - Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,613,672	$ 1,988,916
Gross Unrealized Gains	725	4,773
Gross Unrealized Losses	(199,445)	(186,103)
Fair Value	1,414,952	1,807,586
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	409,152	433,417
Gross Unrealized Gains	129	90
Gross Unrealized Losses	(15,873)	(19,227)
Fair Value	393,408	414,280
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	258,901	580,076
Gross Unrealized Gains	545	4,319
Gross Unrealized Losses	(40,330)	(43,826)
Fair Value	219,116	540,569
Agency mortgage-backed pass-through securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	378,573	370,471
Gross Unrealized Gains	22	362
Gross Unrealized Losses	(50,401)	(42,032)
Fair Value	328,194	328,801
Agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	444,234	461,760
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(78,356)	(67,630)
Fair Value	365,878	394,130
Corporate bonds and other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	122,812	143,192
Gross Unrealized Gains	29	2
Gross Unrealized Losses	(14,485)	(13,388)
Fair Value	$ 108,356	$ 129,806

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SECURITIES - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 77,562
Due after one year through five years	185,518
Due after five years through ten years	141,625
Due after ten years	386,160
Subtotal	790,865
Agency mortgage-backed pass-through securities and collateralized mortgage obligations	822,807
Amortized Cost	1,613,672	$ 1,988,916
Fair Value
Due in one year or less	77,026
Due after one year through five years	174,016
Due after five years through ten years	125,892
Due after ten years	343,946
Subtotal	720,880
Agency mortgage-backed pass-through securities and collateralized mortgage obligations	694,072
Fair Value	$ 1,414,952	$ 1,807,586

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SECURITIES - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of available for sale securities	$ 320,500,000	$ 12,100,000
Realized gains	234,000	$ 42,000
Security owned and pledged as collateral, associated liabilities, fair value	$ 711,800,000		$ 978,900,000

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SECURITIES - Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	$ 233,842	$ 613,275
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(9,214)	(43,642)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	1,109,621	966,550
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(190,231)	(142,461)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	1,343,463	1,579,825
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	(199,445)	(186,103)
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	111,573	99,732
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(3,328)	(1,427)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	261,872	305,256
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(12,545)	(17,800)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	373,445	404,988
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	(15,873)	(19,227)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	18,062	228,192
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(640)	(14,473)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	166,011	134,640
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(39,690)	(29,353)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	184,073	362,832
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	(40,330)	(43,826)
Agency mortgage-backed pass-through securities
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	79,012	95,291
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(3,829)	(7,612)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	248,186	199,836
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(46,572)	(34,420)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	327,197	295,127
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	(50,401)	(42,032)
Agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	13,881	117,147
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(168)	(14,426)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	351,996	276,925
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(78,188)	(53,204)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	365,878	394,072
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	(78,356)	(67,630)
Corporate bonds and other
Debt Securities, Available-for-sale [Line Items]
Securities in a Continuous Unrealized Loss Position, Less than 12 months, Estimated Fair Value	11,314	72,913
Securities in a Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(1,249)	(5,704)
Securities in a Continuous Unrealized Loss Position, More than 12 Months, Estimated Fair Value	81,556	49,893
Securities in a Continuous Unrealized Loss Position, More than 12 Months Unrealized Losses	(13,236)	(7,684)
Securities in a Continuous Unrealized Loss Position, Total Estimated Fair Value	92,870	122,806
Securities in a Continuous Unrealized Loss Position, Total Unrealized Losses	$ (14,485)	$ (13,388)

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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	$ 8,004,528		$ 7,754,751
Allowance for credit losses on loans	(93,575)	$ (100,195)	(93,180)	$ (52,147)	$ (50,242)	$ (47,940)
Loans, net	7,910,953		7,661,571
Commercial and industrial
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	1,474,600		1,455,795
Allowance for credit losses on loans	(32,564)	(38,505)	(41,236)	(15,927)	(16,701)	(16,629)
Paycheck Protection Program (PPP)
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	5,968		13,226
Allowance for credit losses on loans	0	0	0	0	0	0
Real estate: | Commercial real estate (including multi-family residential)
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	4,076,606		3,931,480
Allowance for credit losses on loans	(39,023)	(38,963)	(32,970)	(25,550)	(24,000)	(23,143)
Real estate: | Commercial real estate construction and land development
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	1,078,265		1,037,678
Allowance for credit losses on loans	(13,709)	(14,500)	(14,121)	(8,351)	(7,399)	(6,263)
Real estate: | 1-4 family residential (including home equity)
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	1,024,945		1,000,956
Allowance for credit losses on loans	(4,791)	(4,757)	(2,709)	(1,027)	(1,036)	(847)
Real estate: | Residential construction
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	289,553		268,150
Allowance for credit losses on loans	(2,859)	(3,080)	(1,796)	(1,236)	(1,048)	(975)
Consumer and other
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	54,591		47,466
Allowance for credit losses on loans	$ (629)	$ (390)	$ (348)	$ (56)	$ (58)	$ (83)

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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Accrued interest receivable	$ 36,400,000		$ 36,400,000		$ 34,100,000
Less: allowance for credit losses on loans	93,575,000	$ 52,147,000	93,575,000	$ 52,147,000	93,180,000	$ 100,195,000	$ 50,242,000	$ 47,940,000
Provision (reversal) for credit losses on loans	1,496,000	1,660,000	8,939,000	4,850,000
Non accrual loans interest income			$ 0		0
Concessions granted, percent to loan portfolio (less than)			1.00%
Unfunded Loan Commitment
Financing Receivable Allowance For Credit Losses [Line Items]
Less: allowance for credit losses on loans	10,900,000		$ 10,900,000		$ 12,000,000
Provision (reversal) for credit losses on loans	$ 818,000	$ 302,000	$ 1,000,000	$ 1,100,000

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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Aging Analysis of the Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 8,004,528	$ 7,754,751
Nonaccrual Loans	38,291	45,048
30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	36,020	9,758
90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	36,020	9,758
Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	7,930,217	7,699,945
Commercial and industrial
Accounts Notes And Loans Receivable [Line Items]
Loans	1,474,600	1,455,795
Nonaccrual Loans	14,971	25,297
Commercial and industrial | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	3,535	1,591
Commercial and industrial | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Commercial and industrial | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	3,535	1,591
Commercial and industrial | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	1,456,094	1,428,907
Paycheck Protection Program (PPP)
Accounts Notes And Loans Receivable [Line Items]
Loans	5,968	13,226
Nonaccrual Loans	20	105
Paycheck Protection Program (PPP) | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	85	517
Paycheck Protection Program (PPP) | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Paycheck Protection Program (PPP) | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	85	517
Paycheck Protection Program (PPP) | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	5,863	12,604
Real estate: | Commercial real estate (including multi-family residential)
Accounts Notes And Loans Receivable [Line Items]
Loans	4,076,606	3,931,480
Nonaccrual Loans	13,563	9,970
Real estate: | Commercial real estate (including multi-family residential) | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	19,649	3,222
Real estate: | Commercial real estate (including multi-family residential) | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Real estate: | Commercial real estate (including multi-family residential) | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	19,649	3,222
Real estate: | Commercial real estate (including multi-family residential) | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	4,043,394	3,918,288
Real estate: | Commercial real estate construction and land development
Accounts Notes And Loans Receivable [Line Items]
Loans	1,078,265	1,037,678
Nonaccrual Loans	170	0
Real estate: | Commercial real estate construction and land development | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	4,405	851
Real estate: | Commercial real estate construction and land development | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Real estate: | Commercial real estate construction and land development | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	4,405	851
Real estate: | Commercial real estate construction and land development | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	1,073,690	1,036,827
Real estate: | 1-4 family residential (including home equity)
Accounts Notes And Loans Receivable [Line Items]
Loans	1,024,945	1,000,956
Nonaccrual Loans	8,442	9,404
Real estate: | 1-4 family residential (including home equity) | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	4,742	3,385
Real estate: | 1-4 family residential (including home equity) | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Real estate: | 1-4 family residential (including home equity) | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	4,742	3,385
Real estate: | 1-4 family residential (including home equity) | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	1,011,761	988,167
Real estate: | Residential construction
Accounts Notes And Loans Receivable [Line Items]
Loans	289,553	268,150
Nonaccrual Loans	635	0
Real estate: | Residential construction | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	3,389	0
Real estate: | Residential construction | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Real estate: | Residential construction | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	3,389	0
Real estate: | Residential construction | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	285,529	268,150
Consumer and other
Accounts Notes And Loans Receivable [Line Items]
Loans	54,591	47,466
Nonaccrual Loans	490	272
Consumer and other | 30-89 Days
Accounts Notes And Loans Receivable [Line Items]
Loans	215	192
Consumer and other | 90 or More Days
Accounts Notes And Loans Receivable [Line Items]
Loans	0	0
Consumer and other | Total Past Due Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	215	192
Consumer and other | Current Loans
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 53,886	$ 47,002

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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk Ratings by Category of Loans (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	$ 1,111,337,000
Term Loans Amortized Cost Basis by Origination Year, 2022	2,562,329,000
Term Loans Amortized Cost Basis by Origination Year, 2021	1,573,926,000
Term Loans Amortized Cost Basis by Origination Year, 2020	690,331,000
Term Loans Amortized Cost Basis by Origination Year, 2019	487,058,000
Term Loans Amortized Cost Basis by Origination Year, prior	632,613,000
Revolving Loans	856,852,000
Revolving Loans Converted to Term Loans	90,082,000
Total loans	8,004,528,000	$ 7,754,751,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	174,000
Origination Year, 2021	4,264,000
Origination Year, 2020	456,000
Origination Year, 2019	129,000
Origination Year, Prior	23,000
Revolving Loans	4,144,000
Revolving Loans Converted to Term Loans	531,000
Current-period gross charge-offs, Total	9,721,000
Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	1,100,000,000
Term Loans Amortized Cost Basis by Origination Year, 2022	2,544,580,000
Term Loans Amortized Cost Basis by Origination Year, 2021	1,522,799,000
Term Loans Amortized Cost Basis by Origination Year, 2020	669,821,000
Term Loans Amortized Cost Basis by Origination Year, 2019	462,979,000
Term Loans Amortized Cost Basis by Origination Year, prior	602,116,000
Revolving Loans	844,932,000
Revolving Loans Converted to Term Loans	86,074,000
Total loans	7,833,301,000	7,566,910,000
Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	4,219,000
Term Loans Amortized Cost Basis by Origination Year, 2022	4,362,000
Term Loans Amortized Cost Basis by Origination Year, 2021	10,326,000
Term Loans Amortized Cost Basis by Origination Year, 2020	10,982,000
Term Loans Amortized Cost Basis by Origination Year, 2019	2,910,000
Term Loans Amortized Cost Basis by Origination Year, prior	12,811,000
Revolving Loans	3,502,000
Revolving Loans Converted to Term Loans	102,000
Total loans	49,214,000	42,175,000
Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	7,118,000
Term Loans Amortized Cost Basis by Origination Year, 2022	13,337,000
Term Loans Amortized Cost Basis by Origination Year, 2021	40,801,000
Term Loans Amortized Cost Basis by Origination Year, 2020	9,528,000
Term Loans Amortized Cost Basis by Origination Year, 2019	21,169,000
Term Loans Amortized Cost Basis by Origination Year, prior	17,686,000
Revolving Loans	8,418,000
Revolving Loans Converted to Term Loans	3,906,000
Total loans	121,963,000	145,612,000
Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	50,000
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	50,000	54,000
Commercial and industrial
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	253,662,000
Term Loans Amortized Cost Basis by Origination Year, 2022	304,252,000
Term Loans Amortized Cost Basis by Origination Year, 2021	203,843,000
Term Loans Amortized Cost Basis by Origination Year, 2020	48,795,000
Term Loans Amortized Cost Basis by Origination Year, 2019	44,142,000
Term Loans Amortized Cost Basis by Origination Year, prior	23,343,000
Revolving Loans	532,510,000
Revolving Loans Converted to Term Loans	64,053,000
Total loans	1,474,600,000	1,455,795,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	130,000
Origination Year, 2021	4,264,000
Origination Year, 2020	456,000
Origination Year, 2019	129,000
Origination Year, Prior	0
Revolving Loans	4,143,000
Revolving Loans Converted to Term Loans	531,000
Current-period gross charge-offs, Total	9,653,000
Commercial and industrial | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	249,626,000
Term Loans Amortized Cost Basis by Origination Year, 2022	299,874,000
Term Loans Amortized Cost Basis by Origination Year, 2021	194,032,000
Term Loans Amortized Cost Basis by Origination Year, 2020	47,217,000
Term Loans Amortized Cost Basis by Origination Year, 2019	31,150,000
Term Loans Amortized Cost Basis by Origination Year, prior	23,062,000
Revolving Loans	528,399,000
Revolving Loans Converted to Term Loans	63,180,000
Total loans	1,436,540,000	1,400,191,000
Commercial and industrial | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	2,786,000
Term Loans Amortized Cost Basis by Origination Year, 2022	403,000
Term Loans Amortized Cost Basis by Origination Year, 2021	508,000
Term Loans Amortized Cost Basis by Origination Year, 2020	438,000
Term Loans Amortized Cost Basis by Origination Year, 2019	861,000
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	3,054,000
Revolving Loans Converted to Term Loans	102,000
Total loans	8,152,000	18,982,000
Commercial and industrial | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	1,250,000
Term Loans Amortized Cost Basis by Origination Year, 2022	3,925,000
Term Loans Amortized Cost Basis by Origination Year, 2021	9,303,000
Term Loans Amortized Cost Basis by Origination Year, 2020	1,140,000
Term Loans Amortized Cost Basis by Origination Year, 2019	12,131,000
Term Loans Amortized Cost Basis by Origination Year, prior	281,000
Revolving Loans	1,057,000
Revolving Loans Converted to Term Loans	771,000
Total loans	29,858,000	36,568,000
Commercial and industrial | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	50,000
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	50,000	54,000
Paycheck Protection Program (PPP)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	3,218,000
Term Loans Amortized Cost Basis by Origination Year, 2020	2,750,000
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	5,968,000	13,226,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Paycheck Protection Program (PPP) | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	3,218,000
Term Loans Amortized Cost Basis by Origination Year, 2020	2,750,000
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	5,968,000	13,226,000
Paycheck Protection Program (PPP) | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Paycheck Protection Program (PPP) | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Paycheck Protection Program (PPP) | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: | Commercial real estate (including multi-family residential)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	371,441,000
Term Loans Amortized Cost Basis by Origination Year, 2022	1,333,515,000
Term Loans Amortized Cost Basis by Origination Year, 2021	886,837,000
Term Loans Amortized Cost Basis by Origination Year, 2020	483,108,000
Term Loans Amortized Cost Basis by Origination Year, 2019	354,830,000
Term Loans Amortized Cost Basis by Origination Year, prior	506,284,000
Revolving Loans	129,439,000
Revolving Loans Converted to Term Loans	11,152,000
Total loans	4,076,606,000	3,931,480,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Real estate: | Commercial real estate (including multi-family residential) | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	366,601,000
Term Loans Amortized Cost Basis by Origination Year, 2022	1,327,957,000
Term Loans Amortized Cost Basis by Origination Year, 2021	863,078,000
Term Loans Amortized Cost Basis by Origination Year, 2020	467,867,000
Term Loans Amortized Cost Basis by Origination Year, 2019	348,105,000
Term Loans Amortized Cost Basis by Origination Year, prior	480,980,000
Revolving Loans	128,848,000
Revolving Loans Converted to Term Loans	11,052,000
Total loans	3,994,488,000	3,844,951,000
Real estate: | Commercial real estate (including multi-family residential) | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	934,000
Term Loans Amortized Cost Basis by Origination Year, 2022	508,000
Term Loans Amortized Cost Basis by Origination Year, 2021	7,756,000
Term Loans Amortized Cost Basis by Origination Year, 2020	8,409,000
Term Loans Amortized Cost Basis by Origination Year, 2019	1,716,000
Term Loans Amortized Cost Basis by Origination Year, prior	12,414,000
Revolving Loans	305,000
Revolving Loans Converted to Term Loans	0
Total loans	32,042,000	18,183,000
Real estate: | Commercial real estate (including multi-family residential) | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	3,906,000
Term Loans Amortized Cost Basis by Origination Year, 2022	5,050,000
Term Loans Amortized Cost Basis by Origination Year, 2021	16,003,000
Term Loans Amortized Cost Basis by Origination Year, 2020	6,832,000
Term Loans Amortized Cost Basis by Origination Year, 2019	5,009,000
Term Loans Amortized Cost Basis by Origination Year, prior	12,890,000
Revolving Loans	286,000
Revolving Loans Converted to Term Loans	100,000
Total loans	50,076,000	68,346,000
Real estate: | Commercial real estate (including multi-family residential) | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: | Commercial real estate construction and land development
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	211,118,000
Term Loans Amortized Cost Basis by Origination Year, 2022	522,181,000
Term Loans Amortized Cost Basis by Origination Year, 2021	239,906,000
Term Loans Amortized Cost Basis by Origination Year, 2020	29,578,000
Term Loans Amortized Cost Basis by Origination Year, 2019	9,769,000
Term Loans Amortized Cost Basis by Origination Year, prior	6,408,000
Revolving Loans	58,463,000
Revolving Loans Converted to Term Loans	842,000
Total loans	1,078,265,000	1,037,678,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Real estate: | Commercial real estate construction and land development | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	211,096,000
Term Loans Amortized Cost Basis by Origination Year, 2022	518,943,000
Term Loans Amortized Cost Basis by Origination Year, 2021	227,438,000
Term Loans Amortized Cost Basis by Origination Year, 2020	29,351,000
Term Loans Amortized Cost Basis by Origination Year, 2019	9,689,000
Term Loans Amortized Cost Basis by Origination Year, prior	6,189,000
Revolving Loans	58,463,000
Revolving Loans Converted to Term Loans	693,000
Total loans	1,061,862,000	1,025,141,000
Real estate: | Commercial real estate construction and land development | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	2,222,000
Term Loans Amortized Cost Basis by Origination Year, 2021	2,062,000
Term Loans Amortized Cost Basis by Origination Year, 2020	139,000
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	202,000
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	4,625,000	832,000
Real estate: | Commercial real estate construction and land development | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	22,000
Term Loans Amortized Cost Basis by Origination Year, 2022	1,016,000
Term Loans Amortized Cost Basis by Origination Year, 2021	10,406,000
Term Loans Amortized Cost Basis by Origination Year, 2020	88,000
Term Loans Amortized Cost Basis by Origination Year, 2019	80,000
Term Loans Amortized Cost Basis by Origination Year, prior	17,000
Revolving Loans	0
Revolving Loans Converted to Term Loans	149,000
Total loans	11,778,000	11,705,000
Real estate: | Commercial real estate construction and land development | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: | 1-4 family residential (including home equity)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	135,119,000
Term Loans Amortized Cost Basis by Origination Year, 2022	255,128,000
Term Loans Amortized Cost Basis by Origination Year, 2021	227,665,000
Term Loans Amortized Cost Basis by Origination Year, 2020	119,978,000
Term Loans Amortized Cost Basis by Origination Year, 2019	76,927,000
Term Loans Amortized Cost Basis by Origination Year, prior	95,609,000
Revolving Loans	101,489,000
Revolving Loans Converted to Term Loans	13,030,000
Total loans	1,024,945,000	1,000,956,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	23,000
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	23,000
Real estate: | 1-4 family residential (including home equity) | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	132,680,000
Term Loans Amortized Cost Basis by Origination Year, 2022	252,160,000
Term Loans Amortized Cost Basis by Origination Year, 2021	224,562,000
Term Loans Amortized Cost Basis by Origination Year, 2020	116,514,000
Term Loans Amortized Cost Basis by Origination Year, 2019	72,701,000
Term Loans Amortized Cost Basis by Origination Year, prior	90,921,000
Revolving Loans	94,320,000
Revolving Loans Converted to Term Loans	10,248,000
Total loans	994,106,000	969,396,000
Real estate: | 1-4 family residential (including home equity) | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	499,000
Term Loans Amortized Cost Basis by Origination Year, 2022	569,000
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	1,996,000
Term Loans Amortized Cost Basis by Origination Year, 2019	333,000
Term Loans Amortized Cost Basis by Origination Year, prior	195,000
Revolving Loans	98,000
Revolving Loans Converted to Term Loans	0
Total loans	3,690,000	3,714,000
Real estate: | 1-4 family residential (including home equity) | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	1,940,000
Term Loans Amortized Cost Basis by Origination Year, 2022	2,399,000
Term Loans Amortized Cost Basis by Origination Year, 2021	3,103,000
Term Loans Amortized Cost Basis by Origination Year, 2020	1,468,000
Term Loans Amortized Cost Basis by Origination Year, 2019	3,893,000
Term Loans Amortized Cost Basis by Origination Year, prior	4,493,000
Revolving Loans	7,071,000
Revolving Loans Converted to Term Loans	2,782,000
Total loans	27,149,000	27,846,000
Real estate: | 1-4 family residential (including home equity) | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: | Residential construction
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	116,508,000
Term Loans Amortized Cost Basis by Origination Year, 2022	137,769,000
Term Loans Amortized Cost Basis by Origination Year, 2021	8,292,000
Term Loans Amortized Cost Basis by Origination Year, 2020	4,117,000
Term Loans Amortized Cost Basis by Origination Year, 2019	658,000
Term Loans Amortized Cost Basis by Origination Year, prior	499,000
Revolving Loans	21,710,000
Revolving Loans Converted to Term Loans	0
Total loans	289,553,000	268,150,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Real estate: | Residential construction | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	116,508,000
Term Loans Amortized Cost Basis by Origination Year, 2022	136,500,000
Term Loans Amortized Cost Basis by Origination Year, 2021	6,341,000
Term Loans Amortized Cost Basis by Origination Year, 2020	4,117,000
Term Loans Amortized Cost Basis by Origination Year, 2019	658,000
Term Loans Amortized Cost Basis by Origination Year, prior	499,000
Revolving Loans	21,710,000
Revolving Loans Converted to Term Loans	0
Total loans	286,333,000	266,943,000
Real estate: | Residential construction | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	634,000
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	634,000	421,000
Real estate: | Residential construction | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	635,000
Term Loans Amortized Cost Basis by Origination Year, 2021	1,951,000
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	2,586,000	786,000
Real estate: | Residential construction | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Consumer and other
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	23,489,000
Term Loans Amortized Cost Basis by Origination Year, 2022	9,484,000
Term Loans Amortized Cost Basis by Origination Year, 2021	4,165,000
Term Loans Amortized Cost Basis by Origination Year, 2020	2,005,000
Term Loans Amortized Cost Basis by Origination Year, 2019	732,000
Term Loans Amortized Cost Basis by Origination Year, prior	470,000
Revolving Loans	13,241,000
Revolving Loans Converted to Term Loans	1,005,000
Total loans	54,591,000	47,466,000
Current period gross charge-offs
Origination Year, 2023	0
Origination Year, 2022	44,000
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, 2019	0
Origination Year, Prior	0
Revolving Loans	1,000
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	45,000
Consumer and other | Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	23,489,000
Term Loans Amortized Cost Basis by Origination Year, 2022	9,146,000
Term Loans Amortized Cost Basis by Origination Year, 2021	4,130,000
Term Loans Amortized Cost Basis by Origination Year, 2020	2,005,000
Term Loans Amortized Cost Basis by Origination Year, 2019	676,000
Term Loans Amortized Cost Basis by Origination Year, prior	465,000
Revolving Loans	13,192,000
Revolving Loans Converted to Term Loans	901,000
Total loans	54,004,000	47,062,000
Consumer and other | Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	26,000
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	45,000
Revolving Loans Converted to Term Loans	0
Total loans	71,000	43,000
Consumer and other | Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	312,000
Term Loans Amortized Cost Basis by Origination Year, 2021	35,000
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	56,000
Term Loans Amortized Cost Basis by Origination Year, prior	5,000
Revolving Loans	4,000
Revolving Loans Converted to Term Loans	104,000
Total loans	516,000	361,000
Consumer and other | Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Term Loans Amortized Cost Basis by Origination Year, 2023	0
Term Loans Amortized Cost Basis by Origination Year, 2022	0
Term Loans Amortized Cost Basis by Origination Year, 2021	0
Term Loans Amortized Cost Basis by Origination Year, 2020	0
Term Loans Amortized Cost Basis by Origination Year, 2019	0
Term Loans Amortized Cost Basis by Origination Year, prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	$ 0	$ 0

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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for credit losses on loans:
Balance, beginning of period	$ 100,195	$ 50,242	$ 93,180	$ 47,940
Provision for credit losses on loans	1,496	1,660	8,939	4,850
Charge-offs	(8,176)	(75)	(9,721)	(1,469)
Recoveries	60	320	1,177	826
Net charge-offs	(8,116)	245	(8,544)	(643)
Balance, end of period	93,575	52,147	93,575	52,147
Commercial and industrial
Allowance for credit losses on loans:
Balance, beginning of period	38,505	16,701	41,236	16,629
Provision for credit losses on loans	2,173	(1,091)	(143)	(464)
Charge-offs	(8,169)	(2)	(9,653)	(958)
Recoveries	55	319	1,124	720
Net charge-offs	(8,114)	317	(8,529)	(238)
Balance, end of period	32,564	15,927	32,564	15,927
Paycheck Protection Program (PPP)
Allowance for credit losses on loans:
Balance, beginning of period	0	0	0	0
Provision for credit losses on loans	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net charge-offs	0	0	0	0
Balance, end of period	0	0	0	0
Real estate: | Commercial real estate (including multi-family residential)
Allowance for credit losses on loans:
Balance, beginning of period	38,963	24,000	32,970	23,143
Provision for credit losses on loans	58	1,606	6,037	2,740
Charge-offs	0	(56)	0	(383)
Recoveries	2	0	16	50
Net charge-offs	2	(56)	16	(333)
Balance, end of period	39,023	25,550	39,023	25,550
Real estate: | Commercial real estate construction and land development
Allowance for credit losses on loans:
Balance, beginning of period	14,500	7,399	14,121	6,263
Provision for credit losses on loans	(791)	952	(412)	2,096
Charge-offs	0	0	0	(63)
Recoveries	0	0	0	55
Net charge-offs	0	0	0	(8)
Balance, end of period	13,709	8,351	13,709	8,351
Real estate: | 1-4 family residential (including home equity)
Allowance for credit losses on loans:
Balance, beginning of period	4,757	1,036	2,709	847
Provision for credit losses on loans	34	(9)	2,096	180
Charge-offs	0	0	(23)	0
Recoveries	0	0	9	0
Net charge-offs	0	0	(14)	0
Balance, end of period	4,791	1,027	4,791	1,027
Real estate: | Residential construction
Allowance for credit losses on loans:
Balance, beginning of period	3,080	1,048	1,796	975
Provision for credit losses on loans	(221)	188	1,063	261
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net charge-offs	0	0	0	0
Balance, end of period	2,859	1,236	2,859	1,236
Consumer and other
Allowance for credit losses on loans:
Balance, beginning of period	390	58	348	83
Provision for credit losses on loans	243	14	298	37
Charge-offs	(7)	(17)	(45)	(65)
Recoveries	3	1	28	1
Net charge-offs	(4)	(16)	(17)	(64)
Balance, end of period	$ 629	$ 56	$ 629	$ 56

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Amortized Cost Basis of Collateral Dependent Loans Individually Evaluated to Determine Expected Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	$ 10,887	$ 23,531
Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	3,411	5,090
Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	7,476	18,411
Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	30
Commercial and industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	7,476	18,441
Commercial and industrial | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Commercial and industrial | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	7,476	18,411
Commercial and industrial | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	30
Real estate: | Commercial real estate (including multi-family residential)
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	3,411	1,612
Real estate: | Commercial real estate (including multi-family residential) | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	3,411	1,612
Real estate: | Commercial real estate (including multi-family residential) | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Commercial real estate (including multi-family residential) | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Commercial real estate construction and land development
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Commercial real estate construction and land development | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses		0
Real estate: | Commercial real estate construction and land development | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Commercial real estate construction and land development | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | 1-4 family residential (including home equity)
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	3,478
Real estate: | 1-4 family residential (including home equity) | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	3,478
Real estate: | 1-4 family residential (including home equity) | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | 1-4 family residential (including home equity) | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Residential construction
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Residential construction | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Residential construction | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Real estate: | Residential construction | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Consumer and other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Consumer and other | Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Consumer and other | Business Assets
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	0	0
Consumer and other | Other
Financing Receivable Allowance For Credit Losses [Line Items]
Finance receivables allowance of credit losses	$ 0	$ 0

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	$ 28,912	$ 16,535
Nonaccrual Loans with Related Allowance	9,379	28,513
Total Nonaccrual Loans	38,291	45,048
Commercial and industrial
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	10,337	2,776
Nonaccrual Loans with Related Allowance	4,634	22,521
Total Nonaccrual Loans	14,971	25,297
Paycheck Protection Program (PPP)
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	20	105
Nonaccrual Loans with Related Allowance	0	0
Total Nonaccrual Loans	20	105
Real estate: | Commercial real estate (including multi-family residential)
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	10,820	8,704
Nonaccrual Loans with Related Allowance	2,743	1,266
Total Nonaccrual Loans	13,563	9,970
Real estate: | Commercial real estate construction and land development
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	170	0
Nonaccrual Loans with Related Allowance	0	0
Total Nonaccrual Loans	170	0
Real estate: | 1-4 family residential (including home equity)
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	6,849	4,856
Nonaccrual Loans with Related Allowance	1,593	4,548
Total Nonaccrual Loans	8,442	9,404
Real estate: | Residential construction
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	635	0
Nonaccrual Loans with Related Allowance	0	0
Total Nonaccrual Loans	635	0
Consumer and other
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans with No Related Allowance	81	94
Nonaccrual Loans with Related Allowance	409	178
Total Nonaccrual Loans	$ 490	$ 272

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans Modified Borrowers Experiencing Financial Difficulty (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	$ 2,382,000	$ 15,058,000
Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	89,000
Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	2,212,000	12,836,000
Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	99,000
Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	71,000	2,034,000
Commercial and industrial
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	2,534,000
Commercial and industrial | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	89,000
Commercial and industrial | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	2,185,000
Commercial and industrial | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Commercial and industrial | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Commercial and industrial | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Commercial and industrial | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	260,000
Real estate: | Commercial real estate (including multi-family residential)
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	1,890,000	4,373,000
Real estate: | Commercial real estate (including multi-family residential) | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate (including multi-family residential) | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	1,890,000	2,670,000
Real estate: | Commercial real estate (including multi-family residential) | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate (including multi-family residential) | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate (including multi-family residential) | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate (including multi-family residential) | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	1,703,000
Real estate: | Commercial real estate construction and land development
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	6,850,000
Real estate: | Commercial real estate construction and land development | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate construction and land development | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period		6,850,000
Real estate: | Commercial real estate construction and land development | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate construction and land development | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate construction and land development | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Commercial real estate construction and land development | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | 1-4 family residential (including home equity)
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	492,000	1,207,000
Real estate: | 1-4 family residential (including home equity) | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | 1-4 family residential (including home equity) | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	322,000	1,037,000
Real estate: | 1-4 family residential (including home equity) | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	99,000	99,000
Real estate: | 1-4 family residential (including home equity) | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | 1-4 family residential (including home equity) | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | 1-4 family residential (including home equity) | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	71,000	71,000
Real estate: | Residential construction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Real estate: | Residential construction | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Consumer and other
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	94,000
Consumer and other | Interest Rate Reduction
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Consumer and other | Term Extension
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	94,000
Consumer and other | Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Consumer and other | Principal forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Consumer and other | Combination Term Extension and Principal Forgiveness
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	0	0
Consumer and other | Combination Term Extension and Payment Delay
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, modified period	$ 0	$ 0

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Financial Effects of Loans Modified (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.00%	2.00%
Weighted Average Term Extension		12 months
Real estate: | Commercial real estate (including multi-family residential)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Term Extension	6 months	9 months
Real estate: | Commercial real estate construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Term Extension		12 months
Real estate: | 1-4 family residential (including home equity)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	1.50%	1.50%
Weighted Average Term Extension	24 months	16 years
Real estate: | Residential construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Term Extension		7 months

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans with Payment Default, Modified (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2023 USD ($)
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	$ 89
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	1,385
Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	99
Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Commercial and industrial | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	89
Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	670
Commercial and industrial | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Commercial and industrial | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate (including multi-family residential) | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate (including multi-family residential) | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate (including multi-family residential) | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate (including multi-family residential) | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate construction and land development | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate construction and land development | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate construction and land development | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Commercial real estate construction and land development | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | 1-4 family residential (including home equity) | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | 1-4 family residential (including home equity) | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	715
Real estate: | 1-4 family residential (including home equity) | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	99
Real estate: | 1-4 family residential (including home equity) | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Residential construction | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Residential construction | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Residential construction | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Real estate: | Residential construction | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Consumer and other | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Consumer and other | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Consumer and other | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	0
Consumer and other | Principal forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis, subsequent default loans	$ 0

XML

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) contract	Sep. 30, 2022 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	9
Pre-modifications of Outstanding Recorded Investment	$ 269	$ 2,020
Post-modifications of Outstanding Recorded Investment	$ 269	$ 2,020
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	4
Pre-modifications of Outstanding Recorded Investment	$ 224	$ 768
Post-modifications of Outstanding Recorded Investment	$ 224	$ 768
Real estate: | Commercial real estate (including multi-family residential)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	4
Pre-modifications of Outstanding Recorded Investment	$ 0	$ 1,207
Post-modifications of Outstanding Recorded Investment	$ 0	$ 1,207
Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	1
Pre-modifications of Outstanding Recorded Investment	$ 45	$ 45
Post-modifications of Outstanding Recorded Investment	$ 45	$ 45

XML

LEASES - Narrative (Details)	9 Months Ended
	Sep. 30, 2023 lease
Lessee Lease Description [Line Items]
Number of leased branch locations and office space along with equipment	31
Minimum
Lessee Lease Description [Line Items]
Operating lease renewal term	1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease renewal term	5 years

XML

LEASES - Supplemental Lease Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Balance Sheet:
Operating lease right of use asset classified as premises and equipment	$ 20,483	$ 23,538
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating lease liability classified as other liabilities	$ 20,225	$ 23,136
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Weighted average lease term, in years	7 years 10 months 28 days	8 years 2 months 4 days
Weighted average discount rate	4.14%	4.00%

XML

LEASES - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement:
Operating lease cost	$ 1,885	$ 836	$ 5,280	$ 2,559
Short-term lease cost	8	0	21	0
Total operating lease costs	$ 1,893	$ 836	$ 5,301	$ 2,559

XML

LEASES - Maturity Analysis of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Lease payments due:
Within one year	$ 1,171	$ 4,634
After one but within two years	4,137	4,121
After two but within three years	3,681	3,684
After three but within four years	3,125	3,132
After four but within five years	2,914	2,918
After five years	9,279	9,303
Total lease payments	24,307	27,792
Less: discount on cash flows	4,082	4,656
Operating lease liability classified as other liabilities	$ 20,225	$ 23,136

XML

FAIR VALUE - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	$ 1,414,952	$ 1,807,586
Accrued interest receivable	36,400	34,100
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	302,272	371,705
Available for sale securities	1,414,952	1,807,586
Loans held for investment, net of allowance	7,910,953	7,661,571
Accrued interest receivable	43,536	44,743
Deposits	8,686,621	9,267,632
Accrued interest payable	7,612	2,098
Borrowed funds	323,981	63,925
Subordinated debt	109,665	109,367
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	302,272	371,705
Available for sale securities	1,414,952	1,807,586
Loans held for investment, net of allowance	7,615,073	7,555,602
Accrued interest receivable	43,536	44,743
Deposits	8,677,026	9,256,141
Accrued interest payable	7,612	2,098
Borrowed funds	323,998	63,999
Subordinated debt	107,469	107,910
Estimated Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	302,272	371,705
Available for sale securities	0	0
Loans held for investment, net of allowance	0	0
Accrued interest receivable	176	25
Deposits	0	0
Accrued interest payable	0	0
Borrowed funds	0	0
Subordinated debt	0	0
Estimated Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Available for sale securities	1,414,952	1,807,586
Loans held for investment, net of allowance	0	0
Accrued interest receivable	6,947	10,585
Deposits	8,677,026	9,256,141
Accrued interest payable	7,612	2,098
Borrowed funds	323,998	63,999
Subordinated debt	107,469	107,910
Estimated Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Available for sale securities	0	0
Loans held for investment, net of allowance	7,615,073	7,555,602
Accrued interest receivable	36,413	34,133
Deposits	0	0
Accrued interest payable	0	0
Borrowed funds	0	0
Subordinated debt	$ 0	$ 0

XML

FAIR VALUE - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between levels	$ 0	$ 0
Financial liabilities	10,218,000		$ 9,263,000
Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial liabilities	$ 0		$ 0

XML

FAIR VALUE - Fair Values for Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,414,952	$ 1,807,586
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	393,408	414,280
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	219,116	540,569
Agency mortgage-backed pass-through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	328,194	328,801
Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	365,878	394,130
Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	108,356	129,806
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		1,816,876
Assets and liabilities are measured at fair value, nonrecurring basis	1,425,180
Financial liabilities	10,218	9,263
Recurring Basis | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	10,218	9,263
Recurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		0
Assets and liabilities are measured at fair value, nonrecurring basis	0
Financial liabilities	0	0
Recurring Basis | Level 1 | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Recurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		1,807,586
Assets and liabilities are measured at fair value, nonrecurring basis	1,414,952
Financial liabilities	0	0
Recurring Basis | Level 2 | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Recurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value		9,290
Assets and liabilities are measured at fair value, nonrecurring basis	10,228
Financial liabilities	10,218	9,263
Recurring Basis | Level 3 | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	10,218	9,263
Recurring Basis | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	393,408	414,280
Recurring Basis | U.S. government and agency securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | U.S. government and agency securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	393,408	414,280
Recurring Basis | U.S. government and agency securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	219,116	540,569
Recurring Basis | Municipal securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Municipal securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	219,116	540,569
Recurring Basis | Municipal securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Agency mortgage-backed pass-through securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	328,194	328,801
Recurring Basis | Agency mortgage-backed pass-through securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Agency mortgage-backed pass-through securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	328,194	328,801
Recurring Basis | Agency mortgage-backed pass-through securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	365,878	394,130
Recurring Basis | Agency collateralized mortgage obligations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Agency collateralized mortgage obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	365,878	394,130
Recurring Basis | Agency collateralized mortgage obligations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	108,356	129,806
Recurring Basis | Corporate bonds and other | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Corporate bonds and other | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	108,356	129,806
Recurring Basis | Corporate bonds and other | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	10,218	9,263
Recurring Basis | Interest Rate Swap [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Interest Rate Swap [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Interest Rate Swap [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	10,218	9,263
Recurring Basis | Credit Risk Participation Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	10	27
Recurring Basis | Credit Risk Participation Agreement | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Credit Risk Participation Agreement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Recurring Basis | Credit Risk Participation Agreement | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 10	$ 27

XML

FAIR VALUE - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring Basis - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Branch assets held for sale	$ 5,852	$ 5,165
Assets and liabilities are measured at fair value, nonrecurring basis	5,852	5,165
Level 1 | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 1 | Commercial real estate (including multi-family residential) | Commercial real estate (including multi-family residential)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 1 | Commercial real estate (including multi-family residential) | Commercial real estate construction and land development
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0
Level 1 | Commercial real estate (including multi-family residential) | 1-4 family residential (including home equity)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 1 | Commercial real estate (including multi-family residential) | Consumer and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Branch assets held for sale	0	0
Assets and liabilities are measured at fair value, nonrecurring basis	0	0
Level 2 | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 2 | Commercial real estate (including multi-family residential) | Commercial real estate (including multi-family residential)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 2 | Commercial real estate (including multi-family residential) | Commercial real estate construction and land development
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0
Level 2 | Commercial real estate (including multi-family residential) | 1-4 family residential (including home equity)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0	0
Level 2 | Commercial real estate (including multi-family residential) | Consumer and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Branch assets held for sale	0	0
Assets and liabilities are measured at fair value, nonrecurring basis	31,054	36,397
Level 3 | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	13,830	21,948
Level 3 | Commercial real estate (including multi-family residential) | Commercial real estate (including multi-family residential)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	7,706	11,566
Level 3 | Commercial real estate (including multi-family residential) | Commercial real estate construction and land development
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	6,654
Level 3 | Commercial real estate (including multi-family residential) | 1-4 family residential (including home equity)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	2,776	$ 2,883
Level 3 | Commercial real estate (including multi-family residential) | Consumer and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans:	$ 88

XML

DEPOSITS - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Deposit Liabilities [Abstract]
Time deposits, at or above FDIC insurance limit	$ 560.2	$ 432.9
Brokered deposits	$ 579.0	$ 72.5

XML

DEPOSITS - Time Deposits by Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Deposit Liabilities [Abstract]
Within one year	$ 1,399,265
After one but within two years	85,040
Over three years	19,586
Total	$ 1,503,891	$ 869,712

XML

DERIVATIVE INSTRUMENTS - Narrative (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2023 interest_rate_swap creditAgreement	Dec. 31, 2022 interest_rate_swap creditAgreement
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of interest rate swap agreements outstanding | interest_rate_swap	15	14
Number of credit risk participation agreements | creditAgreement	3	3

XML

DERIVATIVE INSTRUMENTS - Effect of Cash Flow Hedge Relationship on Statement of Comprehensive Income (Detail) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Interest Rate Swap With Financial Institutions One | Other assets
Derivative Instruments Gain Loss [Line Items]
Notional Amount		$ 110,946	$ 109,242
Fair Value, Asset		$ 9,758	$ 8,856
Weighted Average Maturity (Years)	5 years 5 months 26 days	4 years 8 months 26 days
Interest Rate Swap With Financial Institutions One | Other assets | Minimum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate		3.25%	3.25%
Interest Rate Swap With Financial Institutions One | Other assets | Minimum | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate		2.50%	2.50%
Interest Rate Swap With Financial Institutions One | Other assets | Maximum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate			5.58%
Interest Rate Swap With Financial Institutions One | Other assets | Maximum | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate		3.00%	3.00%
Interest Rate Swap With Financial Institutions Two | Other assets
Derivative Instruments Gain Loss [Line Items]
Notional Amount		$ 4,940	$ 5,029
Fair Value, Asset		$ 460	$ 407
Fixed Rate		4.99%	4.99%
Weighted Average Maturity (Years)	4 years 11 months 15 days	4 years 2 months 15 days
Interest Rate Swaps With Customers | Other liabilities
Derivative Instruments Gain Loss [Line Items]
Notional Amount		$ 4,940	$ 5,029
Fair Value, Liability		$ (460)	$ (407)
Fixed Rate		4.99%	4.99%
Weighted Average Maturity (Years)	4 years 11 months 15 days	4 years 2 months 15 days
Interest Rate Swaps With Customers Two | Other assets | Minimum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate			3.25%
Interest Rate Swaps With Customers Two | Other assets | Maximum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate			5.58%
Interest Rate Swaps With Customers Two | Other liabilities
Derivative Instruments Gain Loss [Line Items]
Notional Amount		$ 110,946	$ 109,242
Fair Value, Liability		$ (9,758)	$ (8,856)
Weighted Average Maturity (Years)	5 years 5 months 26 days	4 years 8 months 26 days
Interest Rate Swaps With Customers Two | Other liabilities | Minimum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate		3.25%
Interest Rate Swaps With Customers Two | Other liabilities | Minimum | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate		2.50%	2.50%
Interest Rate Swaps With Customers Two | Other liabilities | Maximum | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate		3.00%
Credit Risk Participation Agreement | Other assets
Derivative Instruments Gain Loss [Line Items]
Notional Amount		$ 20,958	$ 13,028
Fair Value, Asset		$ 10	$ 2
Fixed Rate			3.50%
Weighted Average Maturity (Years)	7 years 2 months 26 days	7 years 6 months 29 days
Credit Risk Participation Agreement | Other assets | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate		2.50%
Credit Risk Participation Agreement | Other assets | LIBOR
Derivative Instruments Gain Loss [Line Items]
Floating Rate			2.50%
Credit Risk Participation Agreement | Other assets | Minimum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate		3.50%
Credit Risk Participation Agreement | Other assets | Maximum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate		5.40%
Credit Risk Participation Agreement Two | Other assets
Derivative Instruments Gain Loss [Line Items]
Notional Amount			$ 8,485
Fair Value, Asset			$ 25
Weighted Average Maturity (Years)	9 years 11 months 19 days
Credit Risk Participation Agreement Two | Other assets | SOFR
Derivative Instruments Gain Loss [Line Items]
Floating Rate			2.50%
Credit Risk Participation Agreement Two | Other assets | Minimum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate			5.35%
Credit Risk Participation Agreement Two | Other assets | Maximum
Derivative Instruments Gain Loss [Line Items]
Fixed Rate			5.40%

XML

BORROWINGS AND BORROWING CAPACITY (Details) - USD ($)	Dec. 13, 2022	Sep. 30, 2023
Frost Agreement | Line of Credit | Revolving Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000
Letters of credit, outstanding amount		$ 0
Period to draw	24 months
Interest payment period	24 months
Debt service ratio	1.25
Texas ratio	0.250
Leverage ratio	0.070
Federal Home Loan Bank of Dallas
Debt Instrument [Line Items]
Maximum borrowing capacity		3,820,000,000
Remaining borrowing capacity		2,280,000,000
Outstanding amount		1,540,000,000
Letters of credit, outstanding amount		$ 1,220,000,000
Federal Home Loan Bank of Dallas | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Weighted average interest rate		5.62%
Federal Home Loan Bank of Dallas | Expire in 2023
Debt Instrument [Line Items]
Letters of credit, outstanding amount		$ 50,800,000
Federal Home Loan Bank of Dallas | Expire in 2024
Debt Instrument [Line Items]
Letters of credit, outstanding amount		72,800,000
Federal Home Loan Bank of Dallas | Expire In 2025
Debt Instrument [Line Items]
Letters of credit, outstanding amount		494,500,000
Federal Home Loan Bank of Dallas | Expire In 2026
Debt Instrument [Line Items]
Letters of credit, outstanding amount		57,300,000
Federal Home Loan Bank of Dallas | Expire In 2027
Debt Instrument [Line Items]
Letters of credit, outstanding amount		448,000,000
Federal Home Loan Bank of Dallas | Expires In 2028
Debt Instrument [Line Items]
Letters of credit, outstanding amount		40,000,000
Federal Home Loan Bank of Dallas | Expire In 2029
Debt Instrument [Line Items]
Letters of credit, outstanding amount		27,000,000
Federal Home Loan Bank of Dallas | Expire In 2030
Debt Instrument [Line Items]
Letters of credit, outstanding amount		30,000,000
Federal Home Loan Bank of Dallas | Weighted Average | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Federal Home Loan Bank, advances, interest rate	3.50%
Federal Home Loan Bank of Dallas | Short-term Debt
Debt Instrument [Line Items]
Federal Home Loan Bank, advances		$ 324,000,000

XML

SUBORDINATED DEBT - Narrative (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Sep. 30, 2019	Dec. 31, 2017	Sep. 30, 2023
Subordinated Notes | Fixed-to-Floating Rate Subordinated Notes
Subordinated Borrowing [Line Items]
Debt instrument, face amount	$ 60.0	$ 40.0
Redemption price	100.00%	100.00%
Stated percentage	4.70%
Subordinated Notes | Fixed-to-Floating Rate Subordinated Notes | LIBOR
Subordinated Borrowing [Line Items]
Basis spread on variable rate	3.13%	3.03%
F&M Bancshares. Inc. | Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Debentures, period over which company may defer interest payments			5 years

XML

SUBORDINATED DEBT - Summary of Pertinent Information Related to Junior Subordinated Debentures (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Subordinated Borrowing [Line Items]
Junior Subordinated Debenture Owed to Trust	$ 11,341
Junior Subordinated Debt | Farmers & Merchants Capital Trust II
Subordinated Borrowing [Line Items]
Trust Preferred Securities Outstanding	7,500
Junior Subordinated Debenture Owed to Trust	$ 7,732
Junior Subordinated Debt | Farmers & Merchants Capital Trust II | SOFR
Subordinated Borrowing [Line Items]
Interest Rate	3.26%
Junior Subordinated Debt | Farmers & Merchants Capital Trust III
Subordinated Borrowing [Line Items]
Trust Preferred Securities Outstanding	$ 3,500
Junior Subordinated Debenture Owed to Trust	$ 3,609
Junior Subordinated Debt | Farmers & Merchants Capital Trust III | SOFR
Subordinated Borrowing [Line Items]
Interest Rate	2.06%

XML

INCOME TAXES (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 7,445,000	$ 3,406,000	$ 24,825,000	$ 11,310,000
Effective income tax rate reconciliation	19.40%	19.30%	19.40%	18.60%
Unrecognized tax benefits, income tax penalties and interest expense			$ 0

XML

STOCK BASED COMPENSATION - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) compensationPlan shares	Sep. 30, 2022 USD ($)	Oct. 01, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)					2,000,000
Shares reserved for issuance (in shares)	1,017,319		1,017,319
Share-based compensation expense | $	$ 2,800	$ 969	$ 8,200	$ 2,900
Number of compensation plans | compensationPlan			3
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $	13,100		$ 13,100
Weighted average period over which unrecognized compensation			1 year 8 months 12 days
Share awards granted (in shares)			262,000
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			2 years
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			2 years
Weighted average period over which unrecognized compensation			2 years
Service period			1 year
Share awards granted (in shares)			119,845
Unrecognized compensation expense | $	$ 2,000		$ 2,000

XML

STOCK BASED COMPENSATION - Stock Option Plans Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Number of Options
Options outstanding, beginning balance (in shares)	368,000
Options granted (in shares)	0
Options exercised (in shares)	(49,000)
Options forfeited (in shares)	(36,000)
Options outstanding, ending balance (in shares)	283,000	368,000
Number of options vested and exercisable (in shares)	283,000
Weighted Average Exercise Price
Options outstanding, beginning balance (in dollars per share)	$ 17.89
Options granted (in dollars per share)	0
Options exercised (in dollars per share)	14.19
Options forfeited (in dollars per share)	20.67
Options outstanding, ending balance (in dollars per share)	18.18	$ 17.89
Weighted Average Exercise Price, Options vested and exercisable (in dollars per share)	$ 18.18
Weighted Average Remaining Contractual Term, Options outstanding	2 years 2 months 1 day	2 years 8 months 19 days
Weighted Average Remaining Contractual Term, Options vested and exercisable	2 years 2 months 1 day
Aggregate Intrinsic Value, Options outstanding	$ 1,036	$ 4,256
Aggregate Intrinsic Value, Options vested and exercisable	$ 1,036

XML

STOCK BASED COMPENSATION - Summary of Restricted Stock Activity (Details) - Restricted Stock shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Number of Shares
Nonvested share awards outstanding, beginning balance (in shares) | shares	501
Share awards granted (in shares) | shares	262
Share awards vested (in shares) | shares	(14)
Unvested share awards forfeited or cancelled (in shares) | shares	(64)
Nonvested share awards outstanding, ending balance (in shares) | shares	685
Weighted Average Grant Date Fair Value
Nonvested share awards outstanding, beginning balance (in dollars per share) | $ / shares	$ 32.84
Share awards granted (in dollars per share) | $ / shares	25.67
Share awards vested (in dollars per share) | $ / shares	25.99
Unvested share awards forfeited or cancelled (in dollars per share) | $ / shares	31.03
Nonvested share awards outstanding, ending balance (in dollars per share) | $ / shares	$ 30.41

XML

OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES - Contractual Amounts of Financial Instruments With Off-balance Sheet Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	$ 447,005	$ 683,408
Variable Rate	1,477,897	1,711,817
Commitments to Extend Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	432,498	673,098
Variable Rate	1,454,648	1,686,627
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed Rate	14,507	10,310
Variable Rate	23,249	25,190
Short-term Debt | Federal Home Loan Bank of Dallas
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
FHLB pledged collateral	$ 1,220,000	$ 1,080,000

XML

OFF-BALANCE SHEET ARRANGEMENTS, COMMITMENTS AND CONTINGENCIES - Narrative (Details)	9 Months Ended
	Sep. 30, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to make loans, period	120 days
Off-balance-sheet fixed rate loan commitments, weighted average maturity	2 years 5 months 15 days
Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet fixed rate loan commitments, interest rate	1.70%
Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet fixed rate loan commitments, interest rate	13.50%
Weighted Average
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet fixed rate loan commitments, interest rate	6.28%

XML

REGULATORY CAPITAL MATTERS - Narrative (Details)	Sep. 30, 2023	Dec. 31, 2022
Regulatory Capital Matters [Abstract]
Capital conservation buffer	2.50%	2.50%

XML

REGULATORY CAPITAL MATTERS - Actual and Required Capital (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Total Capital
Capital	$ 1,201,404	$ 1,092,618
Capital to Risk Weighted Assets	0.1342	0.1239
Capital Required for Capital Adequacy	$ 716,402	$ 705,765
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Plus Capital Conservation Buffer	$ 940,278	$ 926,317
Plus Capital Conservation Buffer to Risk Weighted Assets	0.1050	0.1050
Common Equity Tier 1 Capital
Common Equity Tier 1 Risk Based Capital	$ 997,556	$ 885,652
Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	0.1114	0.1004
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy	$ 402,976	$ 396,993
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0450	0.0450
Plus Common Equity Tier 1 Risk Based Capital	$ 626,852	$ 617,545
Plus Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	0.0700	0.0700
Tier 1 Capital
Tier 1 Risk Based Capital	$ 1,007,454	$ 895,520
Tier 1 Risk Based Capital to Risk Weighted Assets	0.1125	0.1015
Tier 1 Risk Based Capital Required for Capital Adequacy	$ 537,302	$ 529,324
Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Plus Tier 1 Risk Based Capital	$ 761,177	$ 749,876
Plus Tier 1 Risk Based Capital to Risk Weighted Assets	0.0850	0.0850
Tier 1 Capital
Tier 1 Leverage Capital	$ 1,007,454	$ 895,520
Tier 1 Leverage Capital to Average Assets	0.0982	0.0855
Tier 1 Leverage Capital Required for Capital Adequacy	$ 410,344	$ 418,720
Tier 1 Leverage Capital Required for Capital Adequacy to Average Assets	0.0400	0.0400
Plus Tier 1 Leverage Capital	$ 410,344	$ 418,720
Plus Tier 1 Leverage Capital to Average Assets	0.0400	0.0400
Allegiance Bank
Total Capital
Capital	$ 1,174,693	$ 1,059,313
Capital to Risk Weighted Assets	0.1313	0.1202
Capital Required for Capital Adequacy	$ 715,650	$ 705,120
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Plus Capital Conservation Buffer	$ 939,290	$ 925,470
Plus Capital Conservation Buffer to Risk Weighted Assets	0.1050	0.1050
Capital Required to be Well Capitalized	$ 894,562	$ 881,400
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Common Equity Tier 1 Capital
Common Equity Tier 1 Risk Based Capital	$ 1,040,743	$ 921,714
Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	0.1163	0.1046
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy	$ 402,553	$ 396,630
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0450	0.0450
Plus Common Equity Tier 1 Risk Based Capital	$ 626,193	$ 616,980
Plus Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	0.0700	0.0700
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized	$ 581,465	$ 572,910
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0650	0.0650
Tier 1 Capital
Tier 1 Risk Based Capital	$ 1,040,743	$ 921,714
Tier 1 Risk Based Capital to Risk Weighted Assets	0.1163	0.1046
Tier 1 Risk Based Capital Required for Capital Adequacy	$ 536,737	$ 528,840
Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Plus Tier 1 Risk Based Capital	$ 760,378	$ 749,190
Plus Tier 1 Risk Based Capital to Risk Weighted Assets	0.0850	0.0850
Tier 1 Risk Based Capital Required to be Well Capitalized	$ 715,650	$ 705,120
Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0800	0.0800
Tier 1 Capital
Tier 1 Leverage Capital	$ 1,040,743	$ 921,714
Tier 1 Leverage Capital to Average Assets	0.1015	0.0881
Tier 1 Leverage Capital Required for Capital Adequacy	$ 409,957	$ 418,388
Tier 1 Leverage Capital Required for Capital Adequacy to Average Assets	0.0400	0.0400
Plus Tier 1 Leverage Capital	$ 409,957	$ 418,388
Plus Tier 1 Leverage Capital to Average Assets	0.0400	0.0400
Tier 1 Leverage Capital Required to be Well Capitalized	$ 512,446	$ 522,984
Tier 1 Leverage Capital Required to be Well Capitalized to Average Assets	0.0500	0.0500

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EARNINGS PER COMMON SHARE - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to shareholders	$ 30,908	$ 14,286	$ 103,231	$ 49,380
Basic:
Weighted average shares outstanding (in shares)	53,313	28,286	53,211	28,679
Weighted average shares outstanding (in dollars per share)	$ 0.58	$ 0.51	$ 1.94	$ 1.72
Add incremental shares for:
Dilutive effect of stock option exercises and performance share units (in shares)	67	244	89	222
Total (in shares)	53,380	28,530	53,300	28,901
Total (in dollars per share)	$ 0.58	$ 0.50	$ 1.94	$ 1.71

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EARNINGS PER COMMON SHARE - Narrative (Details) - shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	28,372	0