Southside Bancshares (SBSI) 10-Q 28 Oct 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 27, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	000-12247
Entity Registrant Name	SOUTHSIDE BANCSHARES, INC.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	75-1848732
Entity Address, Address Line One	1201 S. Beckham Avenue,
Entity Address, City or Town	Tyler,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75701
City Area Code	903
Local Phone Number	531-7111
Title of 12(b) Security	Common Stock, $1.25 par value
Trading Symbol	SBSI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,105,020
Entity Central Index Key	0000705432
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS (UN

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($)		Sep. 30, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks		$ 110,620,000	$ 91,120,000
Interest earning deposits		3,476,000	110,633,000
Federal funds sold		81,031,000	0
Total cash and cash equivalents		195,127,000	201,753,000
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,424,562,000	2,764,325,000
Securities HTM (estimated fair value of $943,322 and $95,235, respectively)		1,151,205,000	90,780,000
FHLB stock, at cost		12,887,000	14,375,000
Equity investments		11,052,000	11,841,000
Loans held for sale		421,000	1,684,000
Loans:
Loans		4,063,495,000	3,645,162,000
Less: Allowance for loan losses		(36,506,000)	(35,273,000)
Net loans		4,026,989,000	3,609,889,000
Premises and equipment, net		142,653,000	142,509,000
Operating lease ROU assets		15,610,000	15,073,000
Goodwill		201,116,000	201,116,000
Other intangible assets, net		5,137,000	6,895,000
Interest receivable		32,914,000	39,145,000
Deferred tax asset, net		45,991,000	0
Unsettled Issuances of Brokered CDs		28,481,000	0
BOLI		133,394,000	131,232,000
Other assets		26,208,000	28,985,000
Total assets		7,453,747,000	7,259,602,000
Deposits:
Noninterest bearing		1,759,959,000	1,644,775,000
Interest bearing		4,421,200,000	4,077,552,000
Total deposits		6,181,159,000	5,722,327,000
Other borrowings		74,721,000	23,219,000
FHLB borrowings		243,531,000	344,038,000
Subordinated notes, net of unamortized debt issuance costs	[1]	98,639,000	98,534,000
Trust preferred subordinated debentures, net of unamortized debt issuance costs		60,264,000	60,260,000
Deferred tax liability, net		0	17,808,000
Unsettled trades to purchase securities		0	18,995,000
Operating lease liabilities		17,337,000	16,676,000
Other liabilities		70,460,000	45,573,000
Total liabilities		6,746,111,000	6,347,430,000
Off-balance-sheet arrangements, commitments and contingencies (Note 12)
Shareholders’ equity:
Common stock:  ($1.25 par value, 80,000,000 shares authorized, 37,991,729 shares issued at September 30, 2022 and 37,968,969 shares issued at December 31, 2021)		47,490,000	47,461,000
Paid-in capital		783,803,000	780,501,000
Retained earnings		224,142,000	179,813,000
Treasury stock: (shares at cost, 5,864,774 at September 30, 2022 and 5,616,917 at December 31, 2021)		(167,109,000)	(155,308,000)
AOCI		(180,690,000)	59,705,000
Total shareholders’ equity		707,636,000	912,172,000
Total liabilities and shareholders’ equity		$ 7,453,747,000	$ 7,259,602,000
[1]This debt consists of subordinated notes with a remaining maturity greater than one year that qualify under the risk-based capital guidelines as Tier 2 capital, subject to certain limitations.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale [Abstract]
Securities AFS, at estimated fair value	$ 1,592,891	$ 2,655,594
Held-to-maturity Securities, Other Disclosure Items [Abstract]
Securities held-to-maturity, fair value	$ 943,322	$ 95,235
Shareholders' equity:
Common Stock, Par or Stated Value Per Share	$ 1.25	$ 1.25
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	37,991,729	37,968,969
Treasury Stock, Shares	5,864,774	5,616,917

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income:
Loans	$ 45,257	$ 37,034	$ 118,489	$ 108,792
Taxable investment securities	4,896	3,853	14,136	9,097
Tax-exempt investment securities	11,482	9,649	32,306	27,787
MBS	4,770	4,405	12,025	15,140
FHLB stock and equity investments	101	111	291	355
Other interest earning assets	374	24	606	56
Total interest income	66,880	55,076	177,853	161,227
Interest expense:
Deposits	7,887	2,234	15,388	7,170
FHLB borrowings	1,078	1,865	1,668	5,590
Subordinated notes	1,004	2,417	3,002	7,235
Trust preferred subordinated debentures	669	345	1,496	1,045
Other borrowings	727	9	800	31
Total interest expense	11,365	6,870	22,354	21,071
Net interest income	55,515	48,206	155,499	140,156
Provision for (reversal of) credit losses	1,494	(5,071)	1,155	(13,543)
Net interest income after provision for credit losses	54,021	53,277	154,344	153,699
Noninterest income:
Deposit services	6,241	6,779	19,365	19,513
Net gain (loss) on sale of securities AFS	(99)	1,381	(3,819)	3,399
Gain on sale of loans	109	299	495	1,285
Trust fees	1,407	1,494	4,421	4,373
BOLI	720	637	2,131	1,908
Brokerage services	701	846	2,608	2,476
Other	1,190	1,333	4,890	4,371
Total noninterest income	10,269	12,769	30,091	37,325
Noninterest expense:
Salaries and employee benefits	21,368	19,777	61,666	59,825
Net occupancy	3,847	3,532	11,157	10,698
Advertising, travel & entertainment	789	579	2,242	1,491
ATM expense	317	311	954	821
Professional fees	1,412	1,135	3,486	3,166
Software and data processing	1,736	1,503	5,106	4,221
Communications	497	552	1,509	1,689
FDIC insurance	485	454	1,434	1,343
Amortization of intangibles	550	695	1,758	2,191
Loss on redemption of subordinated notes	0	1,118	0	1,118
Other	2,463	2,107	7,453	7,133
Total noninterest expense	33,464	31,763	96,765	93,696
Income before income tax expense	30,826	34,283	87,670	97,328
Income tax expense	3,875	4,977	10,318	12,614
Net income	$ 26,951	$ 29,306	$ 77,352	$ 84,714
Earnings per common share - basic (in dollars per share)	$ 0.84	$ 0.90	$ 2.40	$ 2.60
Earnings per common share - diluted (in dollars per share)	0.84	0.90	2.39	2.59
Cash dividends paid per common share (in dollars per share)	$ 0.34	$ 0.33	$ 1.02	$ 0.98

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 26,951	$ 29,306	$ 77,352	$ 84,714
Securities AFS and transferred securities:
Change in unrealized holding gain (loss) on AFS securities during the period	(61,354)	(27,714)	(256,778)	(43,527)
Change in net unrealized loss on securities transferred from AFS to HTM	(6,367)	0	(97,871)	0
Reclassification adjustment for amortization related to AFS and HTM debt securities	1,396	312	2,949	1,118
Reclassification adjustment for net (gain) loss on sale of AFS securities, included in net income	99	(1,381)	3,819	(3,399)
Derivatives:
Change in net unrealized gain (loss) on effective cash flow hedge interest rate swap derivatives	15,226	377	42,819	8,296
Reclassification adjustment of net (gain) loss related to derivatives designated as cash flow hedges	(1,572)	1,617	94	4,784
Pension plans:
Amortization of net actuarial loss, included in net periodic benefit cost	224	316	671	948
Other comprehensive income (loss), before tax	(52,348)	(26,473)	(304,297)	(31,780)
Income tax (expense) benefit related to items of other comprehensive income (loss)	10,993	5,560	63,902	6,674
Other comprehensive income (loss), net of tax	(41,355)	(20,913)	(240,395)	(25,106)
Comprehensive income (loss)	$ (14,404)	$ 8,393	$ (163,043)	$ 59,608

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Paid In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance, net of tax at Dec. 31, 2020	$ 875,297	$ 47,419	$ 771,511	$ 111,208	$ (123,921)	$ 69,080
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	34,091			34,091
Other comprehensive income (loss)	(29,494)					(29,494)
Issuance of common stock for dividend reinvestment plan	332	11	321
Purchase of common stock	(15,213)				(15,213)
Stock compensation expense	674		674
Net issuance of common stock under employee stock plans	3,386		2,309	(41)	1,118
Cash dividends paid on common stock	(10,476)			(10,476)
Ending balance, net of tax at Mar. 31, 2021	858,597	47,430	774,815	134,782	(138,016)	39,586
Beginning balance, net of tax at Dec. 31, 2020	875,297	47,419	771,511	111,208	(123,921)	69,080
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	84,714
Other comprehensive income (loss)	(25,106)
Ending balance, net of tax at Sep. 30, 2021	877,866	47,450	778,600	163,809	(155,967)	43,974
Beginning balance, net of tax at Mar. 31, 2021	858,597	47,430	774,815	134,782	(138,016)	39,586
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,317			21,317
Other comprehensive income (loss)	25,301					25,301
Issuance of common stock for dividend reinvestment plan	330	9	321
Purchase of common stock	(3,497)				(3,497)
Stock compensation expense	686		686
Net issuance of common stock under employee stock plans	2,441		1,591	(47)	897
Cash dividends paid on common stock	(10,775)			(10,775)
Ending balance, net of tax at Jun. 30, 2021	894,400	47,439	777,413	145,277	(140,616)	64,887
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,306			29,306
Other comprehensive income (loss)	(20,913)					(20,913)
Issuance of common stock for dividend reinvestment plan	324	11	313
Purchase of common stock	(15,438)				(15,438)
Stock compensation expense	829		829
Net issuance of common stock under employee stock plans	64		45	(68)	87
Cash dividends paid on common stock	(10,706)			(10,706)
Ending balance, net of tax at Sep. 30, 2021	877,866	47,450	778,600	163,809	(155,967)	43,974
Beginning balance, net of tax at Dec. 31, 2021	912,172	47,461	780,501	179,813	(155,308)	59,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,996			24,996
Other comprehensive income (loss)	(139,976)					(139,976)
Issuance of common stock for dividend reinvestment plan	322	10	312
Purchase of common stock	(3,358)				(3,358)
Stock compensation expense	819		819
Net issuance of common stock under employee stock plans	269		182	(67)	154
Cash dividends paid on common stock	(11,003)			(11,003)
Ending balance, net of tax at Mar. 31, 2022	784,241	47,471	781,814	193,739	(158,512)	(80,271)
Beginning balance, net of tax at Dec. 31, 2021	912,172	47,461	780,501	179,813	(155,308)	59,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,352
Other comprehensive income (loss)	(240,395)
Ending balance, net of tax at Sep. 30, 2022	707,636	47,490	783,803	224,142	(167,109)	(180,690)
Beginning balance, net of tax at Mar. 31, 2022	784,241	47,471	781,814	193,739	(158,512)	(80,271)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	25,405			25,405
Other comprehensive income (loss)	(59,064)					(59,064)
Issuance of common stock for dividend reinvestment plan	313	10	303
Purchase of common stock	(8,842)				(8,842)
Stock compensation expense	847		847
Net issuance of common stock under employee stock plans	(212)		(453)	(67)	308
Cash dividends paid on common stock	(10,906)			(10,906)
Ending balance, net of tax at Jun. 30, 2022	731,782	47,481	782,511	208,171	(167,046)	(139,335)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,951			26,951
Other comprehensive income (loss)	(41,355)					(41,355)
Issuance of common stock for dividend reinvestment plan	278	9	269
Purchase of common stock	(309)				(309)
Stock compensation expense	760		760
Net issuance of common stock under employee stock plans	448		263	(61)	246
Cash dividends paid on common stock	(10,919)			(10,919)
Ending balance, net of tax at Sep. 30, 2022	$ 707,636	$ 47,490	$ 783,803	$ 224,142	$ (167,109)	$ (180,690)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Issuance of common stock for dividend reinvestment plan (in shares)	7,372	7,717	7,671	8,631	7,780	8,918
Common stock purchased (in shares)	8,613	223,901	82,285	420,204	90,884	427,396
Net issuance of common stock under employee stock plans (in shares)	20,229	30,162	16,551	9,426	99,217	126,260
Cash dividends paid on common stock (in dollars per share)	$ 0.34	$ 0.34	$ 0.34	$ 0.33	$ 0.33	$ 0.32

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
OPERATING ACTIVITIES:
Net income	$ 77,352	$ 84,714
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and net amortization	8,332	8,634
Securities premium amortization (discount accretion), net	13,861	17,709
Loan (discount accretion) premium amortization, net	(267)	(649)
Provision for (reversal of) credit losses	1,155	(13,543)
Stock compensation expense	2,426	2,189
Deferred tax expense (benefit)	103	3,612
Net (gain) loss on sale of AFS securities	3,819	(3,399)
Loss on impairment of investments	38	0
Net loss on premises and equipment	435	315
Gross proceeds from sales of loans held for sale	20,195	36,961
Gross originations of loans held for sale	(18,932)	(34,397)
Net (gain) loss on OREO	(12)	(180)
Loss on redemption of subordinated notes	0	1,118
Net change in:
Interest receivable	6,231	9,611
Other assets	76,432	(2,803)
Interest payable	925	(1,223)
Other liabilities	16,271	19,981
Net cash provided by (used in) operating activities	208,364	128,650
Securities AFS:
Purchases	(697,393)	(569,807)
Sales	460,765	104,728
Maturities, calls and principal repayments	98,046	243,507
Securities HTM:
Purchases	(1,632)	0
Maturities, calls and principal repayments	11,020	16,602
Proceeds from redemption of FHLB stock and equity investments	26,623	19,240
Purchases of FHLB stock and equity investments	(24,346)	(21,113)
Net loan paydowns (originations)	(418,546)	9,314
Purchases of premises and equipment	(8,370)	(6,491)
Purchases of BOLI	0	(13,000)
Proceeds from sales of premises and equipment	1,365	1,853
Net proceeds from sales of OREO	34	797
Proceeds from sales of repossessed assets	47	247
Net cash provided by (used in) investing activities	(552,387)	(214,123)
FINANCING ACTIVITIES:
Net change in deposits	430,321	399,303
Net change in other borrowings	51,502	(2,448)
Proceeds from FHLB borrowings	2,501,000	11,648,180
Repayment of FHLB borrowings	(2,601,507)	(11,821,503)
Net proceeds from issuance of subordinated notes	0	(95)
Redemption of subordinated notes	0	(100,011)
Proceeds from stock option exercises	912	6,108
Cash paid to tax authority related to tax withholding on share-based awards	(407)	(217)
Purchase of common stock	(12,509)	(34,148)
Proceeds from the issuance of common stock for dividend reinvestment plan	913	986
Cash dividends paid	(32,828)	(31,957)
Net cash provided by (used in) financing activities	337,397	64,198
Net increase (decrease) in cash and cash equivalents	(6,626)	(21,275)
Cash and cash equivalents at beginning of period	201,753	108,408
Cash and cash equivalents at end of period	195,127	87,133
SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION:
Interest paid	21,428	22,295
Income taxes paid	8,200	8,750
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Loans transferred to other repossessed assets and real estate through foreclosure	266	740
Transfer of AFS to HTM securities	1,166,550	0
Unsettled trades to purchase securities	0	4,433
Unsettled issuances of brokered CDs	$ 28,481	$ 0

Summary of Significant Accounti

Summary of Significant Accounting and Reporting Policies	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies Basis of Presentation In this report, the words “the Company,” “we,” “us,” and “our” refer to the combined entities of Southside Bancshares, Inc. and its subsidiaries, including Southside Bank. The words “Southside” and “Southside Bancshares” refer to Southside Bancshares, Inc. The words “Southside Bank” and “the Bank” refer to Southside Bank. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, not all information required by GAAP for complete financial statements is included in these interim statements. In the opinion of management, all adjustments necessary for a fair presentation of such financial statements have been included. Such adjustments consisted only of normal recurring items. The preparation of these consolidated financial statements in accordance with GAAP requires the use of management’s estimates. These estimates are subjective in nature and involve matters of judgment. Actual amounts could differ from these estimates. Interim results are not necessarily indicative of results for a full year. These financial statements should be read in conjunction with the financial statements and notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2021. Accounting Changes and Reclassifications Certain prior period amounts may be reclassified to conform to current year presentation. Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide relief for companies preparing for discontinuation of interest rates based on LIBOR. The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued. ASU 2020-04 also provides for a one-time sale and/or transfer to AFS or trading to be made for HTM debt securities that both reference an eligible reference rate and were classified as HTM before January 1, 2020. ASU 2020-04 was effective for all entities as of March 12, 2020 and through December 31, 2022. Companies can apply the ASU as of the beginning of the interim period that includes March 12, 2020 or any date thereafter. The guidance requires companies to apply the guidance prospectively to contract modifications and hedging relationships while the one-time election to sell and/or transfer debt securities classified as HTM may be made any time after March 12, 2020. Additionally, in January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope,” which provided additional clarification that certain optional expedients and exceptions noted above apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. We established an officer level committee to guide our transition from LIBOR in October 2019 and are transitioning to alternative rates consistent with industry timelines. We continue to evaluate our LIBOR exposure, and note that we have the option to have certain of our interest rate swaps fall back to an adjusted SOFR index. Additionally, we anticipate the trust preferred subordinated debentures will transition to a SOFR index once the Federal Reserve completes the relevant rule. We have identified our products that utilize LIBOR and have implemented enhanced fallback language to facilitate the transition to alternative reference rates. We are evaluating existing systems and have begun offering alternative rates. We are no longer offering LIBOR indexed rates on newly originated loans. ASU 2020-04 and ASU 2021-01 are not expected to have a material impact on our consolidated financial statements. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminates the accounting guidance for TDRs, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance to determine whether a modification results in a new loan or a continuation of an existing loan. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost. ASU 2022-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022 for companies that have adopted CECL, which we adopted on January 1, 2020. Early adoption is permitted. The guidance should be applied prospectively with the option to use a modified retrospective transition method for the recognition

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Earnings per share on a basic and diluted basis are calculated as follows (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Basic and Diluted Earnings: Net income $ 26,951 $ 29,306 $ 77,352 $ 84,714 Basic weighted-average shares outstanding 32,112 32,465 32,195 32,641 Add: Stock awards 109 91 146 118 Diluted weighted-average shares outstanding 32,221 32,556 32,341 32,759 Basic earnings per share: Net income $ 0.84 $ 0.90 $ 2.40 $ 2.60 Diluted earnings per share: Net income $ 0.84 $ 0.90 $ 2.39 $ 2.59 For the three months ended September 30, 2022, there were approximately 22,000 anti-dilutive shares. For the nine months ended September 30, 2022, there were no anti-dilutive shares. For the three and nine months ended September 30, 2021, there were approximately 462,000 and 288,000 anti-dilutive shares, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The changes in accumulated other comprehensive income (loss) by component are as follows (in thousands): Three Months Ended September 30, 2022 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ (137,792) $ 21,857 $ (23,400) $ (139,335) Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (67,721) 15,226 — (52,495) Reclassification adjustments included in net income 1,495 (1,572) 224 147 Income tax (expense) benefit 13,908 (2,868) (47) 10,993 Net current-period other comprehensive income (loss), net of tax (52,318) 10,786 177 (41,355) Ending balance, net of tax $ (190,110) $ 32,643 $ (23,223) $ (180,690) Nine Months Ended September 30, 2022 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 84,716 $ (1,257) $ (23,754) $ 59,705 Other comprehensive income (loss): Other comprehensive (loss) income before reclassifications (354,649) 42,819 — (311,830) Reclassification adjustments included in net income 6,768 94 671 7,533 Income tax (expense) benefit 73,055 (9,013) (140) 63,902 Net current-period other comprehensive income (loss), net of tax (274,826) 33,900 531 (240,395) Ending balance, net of tax $ (190,110) $ 32,643 $ (23,223) $ (180,690) Three Months Ended September 30, 2021 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 102,628 $ (8,334) $ (29,407) $ 64,887 Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (27,714) 377 — (27,337) Reclassification adjustments included in net income (1,069) 1,617 316 864 Income tax (expense) benefit 6,045 (418) (67) 5,560 Net current-period other comprehensive income (loss), net of tax (22,738) 1,576 249 (20,913) Ending balance, net of tax $ 79,890 $ (6,758) $ (29,158) $ 43,974 Nine Months Ended September 30, 2021 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 116,078 $ (17,091) $ (29,907) $ 69,080 Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (43,527) 8,296 — (35,231) Reclassification adjustments included in net income (2,281) 4,784 948 3,451 Income tax (expense) benefit 9,620 (2,747) (199) 6,674 Net current-period other comprehensive income (loss), net of tax (36,188) 10,333 749 (25,106) Ending balance, net of tax $ 79,890 $ (6,758) $ (29,158) $ 43,974 The reclassification adjustments out of accumulated other comprehensive income (loss) included in net income are presented below (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Unrealized gains and losses on securities transferred: Amortization of unrealized gains and losses (1) $ (1,396) $ (312) $ (2,949) $ (1,118) Tax benefit 293 66 619 235 Net of tax (1,103) (246) (2,330) (883) Unrealized gains and losses on available for sale securities: Realized net gain (loss) on sale of securities (2) (99) 1,381 (3,819) 3,399 Tax (expense) benefit 21 (290) 802 (714) Net of tax (78) 1,091 (3,017) 2,685 Derivatives: Realized net gain (loss) on interest rate swap derivatives (3) 1,572 (1,617) (94) (4,784) Tax benefit (330) 340 20 1,005 Net of tax 1,242 (1,277) (74) (3,779) Amortization of pension plan: Net actuarial loss (4) (224) (316) (671) (948) Tax benefit 47 67 140 199 Net of tax (177) (249) (531) (749) Total reclassifications for the period, net of tax $ (116) $ (681) $ (5,952) $ (2,726) (1) Included in interest income on the consolidated statements of income. (2) Listed as net gain (loss) on sale of securities AFS on the consolidated statements of income. (3) Included in interest expense for FHLB borrowings and deposits on the consolidated statements of income. (4) These AOCI components are included in the computation of net periodic pension cost (income) presented in “Note 8 – Employee Benefit Plans.”

Securities

Securities	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Debt securities The amortized cost, gross unrealized gains and losses and estimated fair value of investment and mortgage-backed AFS and HTM securities as of September 30, 2022 and December 31, 2021 are reflected in the tables below (in thousands): September 30, 2022 Amortized Gross Unrealized Gross Unrealized Estimated AVAILABLE FOR SALE Cost Gains Losses Fair Value Investment securities: State and political subdivisions $ 1,186,010 $ 26 $ 147,704 $ 1,038,332 Corporate bonds and other 60,144 67 2,794 57,417 MBS: (1) Residential 337,189 263 17,084 320,368 Commercial 9,548 — 1,103 8,445 Total $ 1,592,891 $ 356 $ 168,685 $ 1,424,562 HELD TO MATURITY Investment securities: State and political subdivisions $ 918,216 $ — $ 190,841 $ 727,375 Corporate bonds and other 95,458 — 6,077 89,381 MBS: (1) Residential 94,539 22 8,383 86,178 Commercial 42,992 — 2,604 40,388 Total $ 1,151,205 $ 22 $ 207,905 $ 943,322 December 31, 2021 Amortized Gross Unrealized Gross Unrealized Estimated AVAILABLE FOR SALE Cost Gains Losses Fair Value Investment securities: U.S. Treasury $ 58,084 $ 843 $ 50 $ 58,877 State and political subdivisions 1,962,257 93,893 4,214 2,051,936 Corporate bonds and other 133,333 2,408 209 135,532 MBS: (1) Residential 411,727 14,895 272 426,350 Commercial 90,193 1,642 205 91,630 Total $ 2,655,594 $ 113,681 $ 4,950 $ 2,764,325 HELD TO MATURITY Investment securities: State and political subdivisions $ 788 $ 3 $ — $ 791 MBS: (1) Residential 38,644 2,103 — 40,747 Commercial 51,348 2,349 — 53,697 Total $ 90,780 $ 4,455 $ — $ 95,235 (1) All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs. From time to time, we transfer securities from AFS to HTM due to overall balance sheet strategies. We transferred securities from AFS to HTM with an estimated fair value of $1.07 billion during the nine months ended September 30, 2022. There were no securities transferred from AFS to HTM during the year ended December 31, 2021. The remaining net unamortized, unrealized loss on the transferred securities included in AOCI in the accompanying balance sheets totaled $96.2 million ($76.0 million, net of tax) at September 30, 2022 and $1.5 million ($1.2 million, net of tax) at December 31, 2021. Any net unrealized gain or loss on the transferred securities included in AOCI at the time of transfer will be amortized over the remaining life of the underlying security as an adjustment to the yield on those securities. Securities transferred with losses included in AOCI continue to be included in management’s assessment for impairment for each individual security. We transferred these securities due to overall balance sheet strategies, and our management has the current intent and ability to hold these securities until maturity. Investment securities and MBS with carrying values of $1.58 billion and $1.61 billion were pledged as of September 30, 2022 and December 31, 2021, respectively, to collateralize FHLB borrowings, borrowings from the FRDW, repurchase agreements and public fund deposits, for potential liquidity needs or other purposes as required by law. The following tables present the fair value and unrealized losses on AFS and HTM investment securities and MBS, if applicable, for which an allowance for credit losses has not been recorded as of September 30, 2022 and December 31, 2021, segregated by major security type and length of time in a continuous loss position (in thousands): September 30, 2022 Less Than 12 Months More Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss AVAILABLE FOR SALE Investment securities: State and political subdivisions $ 1,026,787 $ 146,634 $ 3,862 $ 1,070 $ 1,030,649 $ 147,704 Corporate bonds and other 53,381 2,794 — — 53,381 2,794 MBS: Residential 307,521 17,084 — — 307,521 17,084 Commercial 5,666 344 2,779 759 8,445 1,103 Total $ 1,393,355 $ 166,856 $ 6,641 $ 1,829 $ 1,399,996 $ 168,685 HELD TO MATURITY Investment securities: State and political subdivisions $ 644,238 $ 161,326 $ 83,137 $ 29,515 $ 727,375 $ 190,841 Corporate bonds and other 87,630 5,939 1,751 138 89,381 6,077 MBS: Residential 81,422 7,809 3,935 574 85,357 8,383 Commercial 40,388 2,604 — — 40,388 2,604 Total $ 853,678 $ 177,678 $ 88,823 $ 30,227 $ 942,501 $ 207,905 December 31, 2021 Less Than 12 Months More Than 12 Months Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized AVAILABLE FOR SALE Investment securities: U.S. Treasury $ 9,947 $ 50 $ — $ — $ 9,947 $ 50 State and political subdivisions 260,509 3,622 7,608 592 268,117 4,214 Corporate bonds and other 35,597 209 — — 35,597 209 MBS: Residential 1,225 3 5,168 269 6,393 272 Commercial 4,274 7 4,674 198 8,948 205 Total $ 311,552 $ 3,891 $ 17,450 $ 1,059 $ 329,002 $ 4,950 For those AFS debt securities in an unrealized loss position where management (i) has the intent to sell or (ii) where it will more-likely-than-not be required to sell the security before the recovery of its amortized cost basis, we recognize the loss in earnings. For those AFS debt securities in an unrealized loss position that do not meet either of these criteria, management assesses whether the decline in fair value has resulted from credit-related factors, using both qualitative and quantitative criteria. Determining the allowance under the credit loss method requires the use of a discounted cash flow method to assess the credit losses. Any credit-related impairment will be recognized in allowance for credit losses on the balance sheet with a corresponding adjustment to earnings. Noncredit-related temporary impairment, the portion of the impairment relating to factors other than credit (such as changes in market interest rates), is recognized in other comprehensive income, net of tax. As of September 30, 2022 and December 31, 2021, we did not have an allowance for credit losses on our AFS securities, based on our consideration of the qualitative factors associated with each security type in our AFS portfolio. The unrealized losses on our investment and MBS are due to changes in interest rates and spreads and other market conditions. At September 30, 2022, we had 811 AFS debt securities in an unrealized loss position. Our state and political subdivisions are highly rated municipal securities with a long history of no credit losses. Our AFS MBS are highly rated securities which are either explicitly or implicitly backed by the U.S. Government through its agencies which are highly rated by major ratings agencies and also have a long history of no credit losses. Our corporate bonds and other investment securities consist of highly rated investment grade bonds. We assess the likelihood of default and the potential amount of default when assessing our HTM securities for credit losses. We utilize term structures and, due to no prior loss exposure on our state and political subdivision securities or our corporate securities, we currently apply a third-party average loss given default rate to model these securities. Due to a relatively small number of HTM securities in our portfolio as of September 30, 2022 and 2021, we elected to use the specific identification method to model these securities which aligns with our third-party fair value measurement process. The model determined any expected credit loss over the life of these securities to be insignificant. Management further evaluated the remote expectation of loss along with the qualitative factors associated with these securities and concluded that, due to the securities being highly rated municipals and investment grade corporates with a long history of no credit losses, no credit loss should be recognized for these securities for the three and nine months ended September 30, 2022 or 2021. The accrued interest receivable on our debt securities is excluded from the credit loss estimate and is included in interest receivable on our consolidated balance sheets. As of September 30, 2022, accrued interest receivable on AFS and HTM debt securities totaled $11.8 million and $6.3 million, respectively. As of December 31, 2021, accrued interest receivable on AFS and HTM debt securities totaled $25.6 million and $244,000, respectively. No HTM debt securities were past-due or on nonaccrual status as of September 30, 2022 or December 31, 2021. The following table reflects interest income recognized on securities for the periods presented (in thousands): Three Months Ended 2022 2021 U.S. Treasury $ 44 $ 182 State and political subdivisions 14,666 12,223 Corporate bonds and other 1,668 1,097 MBS 4,770 4,405 Total interest income on securities $ 21,148 $ 17,907 Nine Months Ended 2022 2021 U.S. Treasury $ 271 $ 388 State and political subdivisions 41,786 33,568 Corporate bonds and other 4,385 2,928 MBS 12,025 15,140 Total interest income on securities $ 58,467 $ 52,024 There was a $3.8 million net realized loss from the sale of AFS securities for the nine months ended September 30, 2022, which consisted of $4.4 million in realized losses and $584,000 in realized gains. There was a $3.4 million net realized gain from the sale of AFS securities for the nine months ended September 30, 2021, which consisted of $3.5 million in realized gains and $71,000 in realized losses. There were no sales from the HTM portfolio during the nine months ended September 30, 2022 or 2021. We calculate realized gains and losses on sales of securities under the specific identification method. Expected maturities on our securities may differ from contractual maturities because issuers may have the right to call or prepay obligations. MBS are presented in total by category since MBS are typically issued with stated principal amounts and are backed by pools of mortgages that have loans with varying maturities. The characteristics of the underlying pool of mortgages, such as fixed-rate or adjustable-rate, as well as prepayment risk, are passed on to the security holder. The term of a mortgage-backed pass-through security thus approximates the term of the underlying mortgages and can vary significantly due to prepayments. The amortized cost and estimated fair value of AFS and HTM securities at September 30, 2022, are presented below by contractual maturity (in thousands): September 30, 2022 Amortized Cost Fair Value AVAILABLE FOR SALE Investment securities: Due in one year or less $ 528 $ 529 Due after one year through five years 21,668 21,154 Due after five years through ten years 96,779 93,415 Due after ten years 1,127,179 980,651 1,246,154 1,095,749 MBS: 346,737 328,813 Total $ 1,592,891 $ 1,424,562 September 30, 2022 Amortized Cost Fair Value HELD TO MATURITY Investment securities: Due in one year or less $ 125 $ 123 Due after one year through five years 1,039 1,016 Due after five years through ten years 100,463 94,140 Due after ten years 912,047 721,477 1,013,674 816,756 MBS: 137,531 126,566 Total $ 1,151,205 $ 943,322 Equity Investments Equity investments on our consolidated balance sheets include Community Reinvestment Act funds with a readily determinable fair value as well as equity investments without readily determinable fair values. At September 30, 2022 and December 31, 2021, we had equity investments recorded in our consolidated balance sheets of $11.1 million and $11.8 million, respectively. Any realized and unrealized gains and losses on equity investments are reported in income. Equity investments without readily determinable fair values are recorded at cost less impairment, if any. The following is a summary of unrealized and realized gains and losses on equity investments recognized in other noninterest income in the consolidated statements of income during the periods presented (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Net gains (losses) recognized during the period on equity investments $ (230) $ (28) $ (696) $ (118) Less: Net gains recognized during the period on equity investments sold during the period — — — — Unrealized gains (losses) recognized during the reporting period on equity investments held at the reporting date $ (230) $ (28) $ (696) $ (118) Equity investments are assessed quarterly for other-than-temporary impairment. Based upon that evaluation, management does not consider any of our equity investments to be other-than-temporarily impaired at September 30, 2022. FHLB Stock Our FHLB stock, which has limited marketability, is carried at cost and is assessed quarterly for other-than-temporary impairment. Based upon evaluation by management at September 30, 2022, our FHLB stock was not impaired and thus was not considered to be other-than-temporarily impaired.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2022
Receivables [Abstract]
Loans and Allowance for Loan Losses	Loans and Allowance for Loan Losses Loans in the accompanying consolidated balance sheets are classified as follows (in thousands): September 30, 2022 December 31, 2021 Real estate loans: Construction $ 554,345 $ 447,860 1-4 family residential 646,692 651,140 Commercial 1,901,921 1,598,172 Commercial loans 433,538 418,998 Municipal loans 449,219 443,078 Loans to individuals 77,780 85,914 Total loans 4,063,495 3,645,162 Less: Allowance for loan losses 36,506 35,273 Net loans $ 4,026,989 $ 3,609,889 Paycheck Protection Program Loans In April 2020, we began originating loans to qualified small businesses under the PPP administered by the SBA under the provisions of the CARES Act. Loans covered by the PPP may be eligible for loan forgiveness for certain costs incurred related to payroll, group health care benefit costs and qualifying mortgage, rent and utility payments. The remaining loan balance after forgiveness of any amount is still fully guaranteed by the SBA. On December 27, 2020, the Economic Aid Act was signed into law. This second coronavirus relief package granted additional funds for a new round of PPP loans. Additionally, it expanded the eligibility for loans and allowed certain businesses to request a second loan. In return for processing and booking a PPP loan, the SBA paid lenders a processing fee tiered by the size of the loan. These loans are included in commercial loans with an amortized cost basis at September 30, 2022 and December 31, 2021 of $306,000 and $31.0 million, respectively. Construction Real Estate Loans Our construction loans are collateralized by property located primarily in or near the market areas we serve. A number of our construction loans will be owner occupied upon completion. Construction loans for non-owner occupied projects are financed, but these typically have cash flows from leases with tenants, secondary sources of repayment, and in some cases, additional collateral. Our construction loans have both adjustable and fixed interest rates during the construction period. Construction loans to individuals are typically priced and made with the intention of granting the permanent loan on the completed property. Commercial construction loans are subject to underwriting standards similar to that of the commercial portfolio. Owner occupied 1-4 family residential construction loans are subject to the underwriting standards of the permanent loan. 1-4 Family Residential Real Estate Loans Residential loan originations are generated by our loan officers, in-house origination staff, marketing efforts, present customers, walk-in customers and referrals from real estate agents and builders. We focus our lending efforts primarily on the origination of loans secured by first mortgages on owner occupied 1-4 family residences. Substantially all of our 1-4 family residential originations are secured by properties located in or near our market areas. Our 1-4 family residential loans generally have maturities ranging from 15 to 30 years. These loans are typically fully amortizing with monthly payments sufficient to repay the total amount of the loan. Our 1-4 family residential loans are made at both fixed and adjustable interest rates. Underwriting for 1-4 family residential loans includes debt-to-income analysis, credit history analysis, appraised value and down payment considerations. Changes in the market value of real estate can affect the potential losses in the residential portfolio. Commercial Real Estate Loans Commercial real estate loans as of September 30, 2022 consisted of $1.57 billion of owner and non-owner occupied real estate, $307.1 million of loans secured by multi-family properties and $24.8 million of loans secured by farmland. Commercial real estate loans primarily include loans collateralized by retail, commercial office buildings, multi-family residential buildings, medical facilities and offices, senior living, assisted living and skilled nursing facilities, warehouse facilities, hotels and churches. In determining whether to originate commercial real estate loans, we generally consider such factors as the financial condition of the borrower and the debt service coverage of the property. Commercial real estate loans are made at both fixed and adjustable interest rates for terms generally up to 20 years. Commercial Loans Our commercial loans are diversified loan types including short-term working capital loans for inventory and accounts receivable and short- and medium-term loans for equipment or other business capital expansion. In our commercial loan underwriting, we assess the creditworthiness, ability to repay and the value and liquidity of the collateral being offered. Terms of commercial loans are generally commensurate with the useful life of the collateral offered. Municipal Loans We make loans to municipalities and school districts primarily throughout the state of Texas, with a small percentage originating outside of the state. The majority of the loans to municipalities and school districts have tax or revenue pledges and in some cases are additionally supported by collateral. Municipal loans made without a direct pledge of taxes or revenues are usually made based on some type of collateral that represents an essential service. Lending money directly to these municipalities allows us to earn a higher yield than we could if we purchased municipal securities for similar durations. Loans to Individuals Substantially all originations of our loans to individuals are made to consumers in our market areas. The majority of loans to individuals are collateralized by titled equipment, which are primarily automobiles. Loan terms vary according to the type and value of collateral, length of contract and creditworthiness of the borrower. The underwriting standards we employ for consumer loans include an application, a determination of the applicant’s payment history on other debts, with the greatest weight being given to payment history with us and an assessment of the borrower’s ability to meet existing obligations and payments on the proposed loan. Although creditworthiness of the applicant is a primary consideration, the underwriting process also includes a comparison of the value of the collateral, if any, in relation to the proposed loan amount. Most of our loans to individuals are collateralized, which management believes assists in limiting our exposure. Credit Quality Indicators We categorize loans into risk categories on an ongoing basis based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information and current economic trends, among other factors. We use the following definitions for risk ratings: • Pass (Rating 1 – 4) – This rating is assigned to all satisfactory loans. This category, by definition, consists of acceptable credit. Credit and collateral exceptions should not be present, although their presence would not necessarily prohibit a loan from being rated Pass, if deficiencies are in the process of correction. These loans are not included in the Watch List. • Pass Watch (Rating 5) – These loans require some degree of special treatment, but not due to credit quality. This category does not include loans specially mentioned or adversely classified; however, particular attention is warranted to characteristics such as: ▪ A lack of, or abnormally extended payment program; ▪ A heavy degree of concentration of collateral without sufficient margin; ▪ A vulnerability to competition through lesser or extensive financial leverage; and ▪ A dependence on a single or few customers or sources of supply and materials without suitable substitutes or alternatives. • Special Mention (Rating 6) – A Special Mention loan has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in our credit position at some future date. Special Mention loans are not adversely classified and do not expose us to sufficient risk to warrant adverse classification. • Substandard (Rating 7) – Substandard loans are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. • Doubtful (Rating 8) – Loans classified as Doubtful have all the weaknesses inherent in those classified Substandard with the added characteristic that the weaknesses make collection or liquidation, in full, on the basis of currently known facts, conditions and values, highly questionable and improbable. The following tables set forth the amortized cost basis by class of financing receivable and credit quality indicator for the periods presented (in thousands): September 30, 2022 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total 2022 2021 2020 2019 2018 Prior Construction real estate: Pass $ 127,074 $ 200,310 $ 40,301 $ 9,256 $ 1,918 $ 6,813 $ 165,829 $ 551,501 Pass watch — — — — — — — — Special mention 1,830 305 — — — — — 2,135 Substandard — — — 389 45 229 — 663 Doubtful — 46 — — — — — 46 Total construction real estate $ 128,904 $ 200,661 $ 40,301 $ 9,645 $ 1,963 $ 7,042 $ 165,829 $ 554,345 1-4 family residential real estate: Pass $ 91,723 $ 127,248 $ 112,796 $ 68,045 $ 37,349 $ 202,116 $ 2,190 $ 641,467 Pass watch — — — — — — — — Special mention — — 80 — 1,414 — — 1,494 Substandard 4 — 396 160 184 2,531 42 3,317 Doubtful — — — — 178 236 — 414 Total 1-4 family residential real estate $ 91,727 $ 127,248 $ 113,272 $ 68,205 $ 39,125 $ 204,883 $ 2,232 $ 646,692 Commercial real estate: Pass $ 664,538 $ 579,040 $ 170,699 $ 138,748 $ 56,168 $ 241,718 $ 11,944 $ 1,862,855 Pass watch — 9,434 — — — 1,771 — 11,205 Special mention — — 1,844 333 116 1,898 — 4,191 Substandard 596 — 285 14,699 263 7,620 — 23,463 Doubtful — — — 78 — 129 — 207 Total commercial real estate $ 665,134 $ 588,474 $ 172,828 $ 153,858 $ 56,547 $ 253,136 $ 11,944 $ 1,901,921 Commercial loans: Pass $ 105,247 $ 76,210 $ 20,852 $ 9,369 $ 5,792 $ 3,680 $ 164,967 $ 386,117 Pass watch 217 6 — 247 — — 27,452 27,922 Special mention — 5,183 34 — 307 — 12,742 18,266 Substandard — 16 72 122 37 9 74 330 Doubtful 68 328 17 195 240 55 — 903 Total commercial loans $ 105,532 $ 81,743 $ 20,975 $ 9,933 $ 6,376 $ 3,744 $ 205,235 $ 433,538 Municipal loans: Pass $ 49,215 $ 75,567 $ 58,288 $ 56,151 $ 26,141 $ 183,857 $ — $ 449,219 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total municipal loans $ 49,215 $ 75,567 $ 58,288 $ 56,151 $ 26,141 $ 183,857 $ — $ 449,219 Loans to individuals: Pass $ 25,795 $ 24,290 $ 15,004 $ 6,515 $ 1,994 $ 1,285 $ 2,838 $ 77,721 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — 1 — 10 40 4 1 56 Doubtful — — — — — 3 — 3 Total loans to individuals $ 25,795 $ 24,291 $ 15,004 $ 6,525 $ 2,034 $ 1,292 $ 2,839 $ 77,780 Total loans $ 1,066,307 $ 1,097,984 $ 420,668 $ 304,317 $ 132,186 $ 653,954 $ 388,079 $ 4,063,495 December 31, 2021 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total 2021 2020 2019 2018 2017 Prior Construction real estate: Pass $ 179,521 $ 82,862 $ 38,788 $ 5,666 $ 2,126 $ 6,080 $ 132,592 $ 447,635 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — 175 — 175 Doubtful — — — 50 — — — 50 Total construction real estate $ 179,521 $ 82,862 $ 38,788 $ 5,716 $ 2,126 $ 6,255 $ 132,592 $ 447,860 1-4 family residential real estate: Pass $ 141,058 $ 129,681 $ 81,607 $ 47,566 $ 34,236 $ 209,470 $ 2,238 $ 645,856 Pass watch — — — — — 777 — 777 Special mention — 82 — — — — — 82 Substandard 57 403 55 — 295 3,257 88 4,155 Doubtful — — — — — 270 — 270 Total 1-4 family residential real estate $ 141,115 $ 130,166 $ 81,662 $ 47,566 $ 34,531 $ 213,774 $ 2,326 $ 651,140 Commercial real estate: Pass $ 648,002 $ 207,370 $ 209,923 $ 114,788 $ 143,350 $ 209,368 $ 7,566 $ 1,540,367 Pass watch 21,669 — 2,163 3,074 374 — — 27,280 Special mention — 2,062 2,217 119 163 1,877 — 6,438 Substandard 3,299 667 10,830 1,480 — 7,691 — 23,967 Doubtful — — — — — 120 — 120 Total commercial real estate $ 672,970 $ 210,099 $ 225,133 $ 119,461 $ 143,887 $ 219,056 $ 7,566 $ 1,598,172 Commercial loans: Pass $ 140,628 $ 51,866 $ 24,688 $ 13,204 $ 2,516 $ 4,062 $ 178,263 $ 415,227 Pass watch — — 280 22 — — — 302 Special mention — 57 78 363 — 157 — 655 Substandard — 283 296 174 16 — 1,457 2,226 Doubtful 7 26 124 359 — 72 — 588 Total commercial loans $ 140,635 $ 52,232 $ 25,466 $ 14,122 $ 2,532 $ 4,291 $ 179,720 $ 418,998 Municipal loans: Pass $ 80,167 $ 64,803 $ 61,348 $ 29,168 $ 56,274 $ 151,318 $ — $ 443,078 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total municipal loans $ 80,167 $ 64,803 $ 61,348 $ 29,168 $ 56,274 $ 151,318 $ — $ 443,078 Loans to individuals: Pass $ 40,252 $ 24,028 $ 11,813 $ 4,121 $ 1,684 $ 849 $ 3,052 $ 85,799 Pass watch — — — — — — — — Special mention — — — 36 — — — 36 Substandard — 1 24 4 23 10 2 64 Doubtful — — 1 7 3 4 — 15 Total loans to individuals $ 40,252 $ 24,029 $ 11,838 $ 4,168 $ 1,710 $ 863 $ 3,054 $ 85,914 Total loans $ 1,254,660 $ 564,191 $ 444,235 $ 220,201 $ 241,060 $ 595,557 $ 325,258 $ 3,645,162 Watchlisted loans reported as 2022 originations as of September 30, 2022 and watchlisted loans reported as 2021 originations as of December 31, 2021 were, for the majority, first originated in various years prior to 2022 and 2021, respectively, but were renewed in the respective year. The following tables present the aging of the amortized cost basis in past due loans by class of loans (in thousands): September 30, 2022 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Past Due Total Past Due Current Total Real estate loans: Construction $ 160 $ 410 $ 46 $ 616 $ 553,729 $ 554,345 1-4 family residential 1,367 547 516 2,430 644,262 646,692 Commercial 243 422 — 665 1,901,256 1,901,921 Commercial loans 1,094 794 434 2,322 431,216 433,538 Municipal loans — — — — 449,219 449,219 Loans to individuals 208 — — 208 77,572 77,780 Total $ 3,072 $ 2,173 $ 996 $ 6,241 $ 4,057,254 $ 4,063,495 December 31, 2021 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Real estate loans: Construction $ 82 $ 58 $ — $ 140 $ 447,720 $ 447,860 1-4 family residential 3,226 606 227 4,059 647,081 651,140 Commercial 1,191 — 99 1,290 1,596,882 1,598,172 Commercial loans 1,523 251 537 2,311 416,687 418,998 Municipal loans 170 — — 170 442,908 443,078 Loans to individuals 315 41 8 364 85,550 85,914 Total $ 6,507 $ 956 $ 871 $ 8,334 $ 3,636,828 $ 3,645,162 The following table sets forth the amortized cost basis of nonperforming assets for the periods presented (in thousands): September 30, 2022 December 31, 2021 Nonaccrual loans: Real estate loans: Construction $ 77 $ 57 1-4 family residential 1,183 969 Commercial 696 668 Commercial loans 1,071 815 Loans to individuals 12 27 Total nonaccrual loans (1) 3,039 2,536 Accruing loans past due more than 90 days — — TDR loans 8,481 9,073 OREO 162 — Repossessed assets 35 — Total nonperforming assets $ 11,717 $ 11,609 (1) Includes $950,000 and $1.1 million of TDR loans as of September 30, 2022 and December 31, 2021, respectively. We reversed $10,000 and $33,000 of interest income on nonaccrual loans during the three and nine months ended September 30, 2022, and $5,000 and $13,000 for the three and nine months ended September 30, 2021, respectively. We had $1.0 million and $1.2 million of loans on nonaccrual for which there was no related allowance for credit losses as of September 30, 2022 and December 31, 2021, respectively. Collateral-dependent loans are loans that we expect the repayment to be provided substantially through the operation or sale of the collateral of the loan and we have determined that the borrower is experiencing financial difficulty. In such cases, expected credit losses are based on the fair value of the collateral at the measurement date, adjusted for selling costs. As of September 30, 2022 and December 31, 2021, we had $8.7 million and $8.5 million, respectively, of collateral-dependent loans, secured mainly by real estate and equipment. There have been no significant changes to the collateral that secures the collateral-dependent assets. Foreclosed assets include OREO and repossessed assets. For 1-4 family residential real estate properties, a loan is recognized as a foreclosed property once legal title to the real estate property has been received upon completion of foreclosure or the borrower has conveyed all interest in the residential property through a deed in lieu of foreclosure. There were $171,000 and $21,000 loans secured by 1-4 family residential properties for which formal foreclosure proceedings were in process as of September 30, 2022 and December 31, 2021, respectively. Troubled Debt Restructurings The restructuring of a loan is considered a TDR if both (i) the borrower is experiencing financial difficulties and (ii) the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, restructuring amortization schedules and other actions intended to minimize potential losses. We may provide a combination of concessions which may include an extension of the amortization period, interest rate reduction and/or converting the loan to interest-only for a limited period of time. The following tables set forth the recorded balance of loans considered to be TDRs that were restructured and the type of concession by class of loans during the periods presented (dollars in thousands): Nine Months Ended September 30, 2022 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 307 $ 307 4 Commercial loans — — 5 5 1 Loans to individuals — — 9 9 2 Total $ — $ — $ 321 $ 321 7 Three Months Ended September 30, 2021 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 219 $ 219 3 Commercial — — 453 453 1 Total $ — $ — $ 672 $ 672 4 Nine Months Ended September 30, 2021 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 344 $ 344 5 Commercial — — 453 453 1 Commercial loans — 16 94 110 3 Total $ — $ 16 $ 891 $ 907 9 There were no TDRs restructured during the three months ended September 30, 2022. Interest continues to be charged on principal balances outstanding during the extended term. Therefore, the financial effects of the recorded investment of loans restructured as TDRs during the nine months ended September 30, 2022 and 2021 were not significant. On an ongoing basis, the performance of the TDRs is monitored for subsequent payment default. Payment default for TDRs is recognized when the borrower is 90 days or more past due. As of September 30, 2022 and 2021, the amount of TDRs in default was not significant. Payment defaults for TDRs did not significantly impact the determination of the allowance for loan losses in the periods presented. At September 30, 2022 and 2021, there were no commitments to lend additional funds to borrowers whose terms had been modified in TDRs. Allowance for Loan Losses The following tables detail activity in the allowance for loan losses by portfolio segment for the periods presented (in thousands): Three Months Ended September 30, 2022 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 3,399 $ 2,024 $ 27,221 $ 2,558 $ 46 $ 201 $ 35,449 Loans charged-off — (66) — (192) — (428) (686) Recoveries of loans charged-off — 4 — 139 — 306 449 Net loans (charged-off) recovered — (62) — (53) — (122) (237) Provision for (reversal of) loan losses 136 44 1,273 (272) (2) 115 1,294 Balance at end of period $ 3,535 $ 2,006 $ 28,494 $ 2,233 $ 44 $ 194 $ 36,506 Nine Months Ended September 30, 2022 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 3,787 $ 1,866 $ 26,980 $ 2,397 $ 47 $ 196 $ 35,273 Loans charged-off — (66) — (369) — (1,285) (1,720) Recoveries of loans charged-off 1 96 81 469 — 858 1,505 Net loans (charged-off) recovered 1 30 81 100 — (427) (215) Provision for (reversal of) loan losses (253) 110 1,433 (264) (3) 425 1,448 Balance at end of period $ 3,535 $ 2,006 $ 28,494 $ 2,233 $ 44 $ 194 $ 36,506 Three Months Ended September 30, 2021 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 8,018 $ 2,520 $ 28,930 $ 3,097 $ 47 $ 301 $ 42,913 Loans charged-off — (35) — (508) — (397) (940) Recoveries of loans charged-off 1 4 12 74 — 346 437 Net loans (charged-off) recovered 1 (31) 12 (434) — (51) (503) Provision for (reversal of) loan losses (3,036) (543) (684) (103) (1) (21) (4,388) Balance at end of period $ 4,983 $ 1,946 $ 28,258 $ 2,560 $ 46 $ 229 $ 38,022 Nine Months Ended September 30, 2021 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 6,490 $ 2,270 $ 35,709 $ 4,107 $ 46 $ 384 $ 49,006 Loans charged-off — (136) — (943) — (1,183) (2,262) Recoveries of loans charged-off 2 71 13 535 — 904 1,525 Net loans (charged-off) recovered 2 (65) 13 (408) — (279) (737) Provision for (reversal of) loan losses (1,509) (259) (7,464) (1,139) — 124 (10,247) Balance at end of period $ 4,983 $ 1,946 $ 28,258 $ 2,560 $ 46 $ 229 $ 38,022 The accrued interest receivable on our loan receivables is excluded from the allowance for credit loss estimate and is included in interest receivable on our consolidated balance sheets. As of September 30, 2022 and December 31, 2021, the accrued interest on our loan portfolio was $14.8 million and $13.3 million, respectively.

Borrowing Arrangements

Borrowing Arrangements	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Borrowing Arrangements	Borrowing Arrangements Information related to borrowings is provided in the table below (dollars in thousands): September 30, 2022 December 31, 2021 Other borrowings: Balance at end of period $ 74,721 $ 23,219 Average amount outstanding during the period (1) 62,814 22,257 Maximum amount outstanding during the period (2) 248,592 24,549 Weighted average interest rate during the period (3) 1.7 % 0.2 % Interest rate at end of period (4) 2.1 % 0.2 % FHLB borrowings: Balance at end of period $ 243,531 $ 344,038 Average amount outstanding during the period (1) 117,724 665,384 Maximum amount outstanding during the period (2) 423,645 723,584 Weighted average interest rate during the period (3) 1.9 % 1.1 % Interest rate at end of period (5) 3.1 % 1.3 % (1) The average amount outstanding during the period was computed by dividing the total daily outstanding principal balances by the number of days in the period. (2) The maximum amount outstanding at any month-end during the period. (3) The weighted average interest rate during the period was computed by dividing the actual interest expense (annualized for interim periods) by the average amount outstanding during the period. The weighted average interest rate on the FHLB borrowings includes the effect of interest rate swaps. (4) Stated rate. (5) As of December 31, 2021, the interest rate on the FHLB borrowings includes the effect of interest rate swaps. Maturities of the obligations associated with our borrowing arrangements based on scheduled repayments at September 30, 2022 are as follows (in thousands): Payments Due by Period Less than 1-2 Years 2-3 Years 3-4 Years 4-5 Years Thereafter Total Other borrowings $ 72,021 $ 2,700 $ — $ — $ — $ — $ 74,721 FHLB borrowings 240,702 733 764 582 401 349 243,531 Total obligations $ 312,723 $ 3,433 $ 764 $ 582 $ 401 $ 349 $ 318,252 Other borrowings may include federal funds purchased, repurchase agreements and borrowings from the FRDW. Southside Bank has three unsecured lines of credit for the purchase of overnight federal funds at prevailing rates with Frost Bank, TIB – The Independent Bankers Bank and Comerica Bank for $40.0 million, $15.0 million and $7.5 million, respectively. There were no federal funds purchased at September 30, 2022 or December 31, 2021. To provide more liquidity in response to the economic impact of the COVID-19 pandemic, the Federal Reserve took steps to encourage broader use of the discount window. At September 30, 2022, the amount of additional funding the Bank could obtain from the FRDW, collateralized by securities, was approximately $505.8 million. There were $34.0 million in borrowings from the FRDW at September 30, 2022. There were no borrowings from the FRDW at December 31, 2021. Southside Bank has a $5.0 million line of credit with Frost Bank to be used to issue letters of credit, and at September 30, 2022, the line had one outstanding letter of credit for $155,000. Southside Bank currently has no outstanding letters of credit from FHLB held as collateral for its public fund deposits. Southside Bank enters into sales of securities under repurchase agreements. These repurchase agreements totaled $40.7 million at September 30, 2022 and $23.2 million at December 31, 2021, and had maturities of less than 1.4 years. Repurchase agreements are secured by investment and MBS securities and are stated at the amount of cash received in connection with the transaction.

Long-term Debt

Long-term Debt	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt Information related to our long-term debt is summarized as follows for the periods presented (in thousands): September 30, 2022 December 31, 2021 Subordinated notes: (1) 3.875% Subordinated notes, net of unamortized debt issuance costs (2) $ 98,639 $ 98,534 Total Subordinated notes 98,639 98,534 Trust preferred subordinated debentures: (3) Southside Statutory Trust III, net of unamortized debt issuance costs (4) 20,572 20,568 Southside Statutory Trust IV 23,196 23,196 Southside Statutory Trust V 12,887 12,887 Magnolia Trust Company I 3,609 3,609 Total Trust preferred subordinated debentures 60,264 60,260 Total Long-term debt $ 158,903 $ 158,794 (1) This debt consists of subordinated notes with a remaining maturity greater than one year that qualify under the risk-based capital guidelines as Tier 2 capital, subject to certain limitations. (2) The unamortized discount and debt issuance costs reflected in the carrying amount of the subordinated notes totaled approximately $1.4 million at September 30, 2022 and $1.5 million at December 31, 2021. (3) This debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations. (4) The unamortized debt issuance costs reflected in the carrying amount of the Southside Statutory Trust III junior subordinated debentures totaled $47,000 at September 30, 2022 and $51,000 at December 31, 2021. As of September 30, 2022, the details of the subordinated notes and the trust preferred subordinated debentures are summarized below (dollars in thousands): Date Issued Amount Issued Fixed or Floating Rate Interest Rate Maturity Date 3.875% Subordinated Notes November 6, 2020 $ 100,000 Fixed-to-Floating 3.875% November 15, 2030 Southside Statutory Trust III September 4, 2003 $ 20,619 Floating 3 month LIBOR + 2.94% September 4, 2033 Southside Statutory Trust IV August 8, 2007 $ 23,196 Floating 3 month LIBOR + 1.30% October 30, 2037 Southside Statutory Trust V August 10, 2007 $ 12,887 Floating 3 month LIBOR + 2.25% September 15, 2037 Magnolia Trust Company I (1) May 20, 2005 $ 3,609 Floating 3 month LIBOR + 1.80% November 23, 2035 (1) On October 10, 2007, as part of an acquisition we assumed $3.6 million of floating rate junior subordinated debentures issued in 2005 to Magnolia Trust Company I.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Employee Benefit Plans	Employee Benefit Plans The components of net periodic benefit cost (income) related to our employee benefit plans are as follows (in thousands): Three Months Ended September 30, Retirement Plan Acquired Retirement Plan Restoration 2022 2021 2022 2021 2022 2021 Interest cost $ 685 $ 642 $ 25 $ 23 $ 144 $ 130 Expected return on assets (1,461) (1,355) (58) (53) — — Net loss amortization 160 251 — 1 64 64 Net periodic benefit cost (income) $ (616) $ (462) $ (33) $ (29) $ 208 $ 194 Nine Months Ended September 30, Defined Benefit Defined Benefit Restoration 2022 2021 2022 2021 2022 2021 Interest cost $ 2,056 $ 1,927 $ 76 $ 69 $ 433 $ 390 Expected return on assets (4,384) (4,065) (174) (158) — — Net loss amortization 480 752 — 4 191 192 Net periodic benefit cost (income) $ (1,848) $ (1,386) $ (98) $ (85) $ 624 $ 582 At June 30, 2021, we updated our expected long-term rate of return on plan assets for the Retirement Plan and the Acquired Retirement Plan from 6.50% to 6.125%. This assumption is reviewed, at a minimum, on an annual basis. The noncash adjustment to the employee benefit plan liabilities, consisting of changes in net loss, was $671,000 and $948,000 for the nine months ended September 30, 2022 and 2021, respectively.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	Derivative Financial Instruments and Hedging Activities Our hedging policy allows the use of interest rate derivative instruments to manage our exposure to interest rate risk or hedge specified assets and liabilities. These instruments may include interest rate swaps and interest rate caps and floors. All derivative instruments are carried on the balance sheet at their estimated fair value and are recorded in other assets or other liabilities, as appropriate. Derivative instruments may be designated as cash flow hedges of variable rate assets or liabilities, cash flow hedges of forecasted transactions, fair value hedges of a recognized asset or liability or as non-hedging instruments. Gains and losses on derivative instruments designated as cash flow hedges are recorded in AOCI to the extent they are effective. If the hedge is effective, the amount recorded in other comprehensive income is reclassified to earnings in the same periods that the hedged cash flows impact earnings. The ineffective portion of changes in fair value is reported in current earnings. Gains and losses on derivative instruments designated as fair value hedges, as well as the change in fair value on the hedged item, are recorded in interest income in the consolidated statements of income. Gains and losses due to changes in fair value of the interest rate swap agreements completely offset changes in the fair value of the hedged portion of the hedged item. For derivative instruments not designated as hedging instruments, the gain or loss is recognized in current earnings during the period of change. We have entered into certain interest rate swap contracts on specific variable rate agreements and fixed rate short-term pay agreements with third-parties. These interest rate swap contracts were designated as hedging instruments in cash flow hedges under ASC Topic 815. The objective of the interest rate swap contracts is to manage the expected future cash flows on $575.0 million of Bank liabilities. The cash flows from the swap contracts are expected to be effective in hedging the variability in future cash flows attributable to fluctuations in the underlying LIBOR interest rate. During the second and third quarters of 2022, we entered into partial term fair value hedges, as allowed under ASU 2017-12, for certain of our fixed rate callable AFS municipal securities. The instruments are designated as fair value hedges as the changes in the fair value of the interest rate swap are expected to offset changes in the fair value of the hedged item attributable to changes in the SOFR swap rate, the designated benchmark interest rate. As of September 30, 2022, hedged securities with a carrying amount of $708.9 million are included in our AFS securities portfolio in our consolidated balance sheets. These derivative contracts involve the receipt of floating rate interest from a counterparty in exchange for us making fixed-rate payments over the life of the agreement, without the exchange of the underlying notional value. The change in the fair value of these hedging instruments is recorded in AOCI and is subsequently reclassified into earnings in the period that the hedged transactions affects earnings. In accordance with ASC Topic 815, if a hedging item is terminated prior to maturity for a cash settlement, the existing gain or loss within AOCI will continue to be reclassified into earnings during the period or periods in which the hedged forecasted transaction affects earnings unless it is probable the forecasted transaction will not occur by the end of the originally specified time period. These transactions are reevaluated on a monthly basis to determine if the hedged forecasted transactions are still probable of occurring. If at a subsequent evaluation, it is determined that the transactions will not occur, any related gains or losses recorded in AOCI are immediately recognized in earnings. From time to time, we may enter into certain interest rate swaps, cap and floor contracts that are not designated as hedging instruments. These interest rate derivative contracts relate to transactions in which we enter into an interest rate swap, cap or floor with a customer while concurrently entering into an offsetting interest rate swap, cap or floor with a third party financial institution. We agree to pay interest to the customer on a notional amount at a variable rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, we agree 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. These interest rate derivative contracts allow our customers to effectively convert a variable rate loan to a fixed rate loan. The changes in the fair value of the underlying derivative contracts primarily offset each other and do not significantly impact our results of operations. We recognized swap fee income associated with these derivative contracts immediately based upon the difference in the bid/ask spread of the underlying transactions with the customer and the third party financial institution. The swap fee income is included in other noninterest income in our consolidated statements of income. At September 30, 2022, net derivative asset included $81.0 million of cash collateral received from counterparties under master netting agreements. At December 31, 2021, net derivative liabilities included $12.8 million, of cash collateral held by counterparties subject to master netting agreements. The notional amounts of the derivative instruments represent the contractual cash flows pertaining to the underlying agreements. These amounts are not exchanged and are not reflected in the consolidated balance sheets. The fair value of the interest rate swaps are presented at net in other assets and other liabilities and in the net change in each of these financial statement line items in the accompanying consolidated statements of cash flows when a right of offset exists, based on transactions with a single counterparty that are subject to a legally enforceable master netting agreement. The following tables present the notional and estimated fair value amount of derivative positions outstanding (in thousands): September 30, 2022 December 31, 2021 Estimated Fair Value Estimated Fair Value Notional (1) Asset Derivative Liability Derivative Notional (1) Asset Derivative Liability Derivative Derivatives designated as hedging instruments Interest rate contracts: Swaps-Cash Flow Hedge-Financial institution counterparties $ 575,000 $ 41,320 $ — $ 605,000 $ 4,274 $ 5,866 Swaps-Fair Value Hedge-Financial institution counterparties 742,675 23,956 18 — — — Derivatives designated as non-hedging instruments Interest rate contracts: Swaps-Financial institution counterparties 229,199 22,804 — 214,379 545 13,412 Swaps-Customer counterparties 229,199 — 22,804 214,379 13,412 545 Gross derivatives 88,080 22,822 18,231 19,823 Offsetting derivative assets/liabilities (18) (18) (4,819) (4,819) Cash collateral received/posted (81,030) — — (12,810) Net derivatives included in the consolidated balance sheets (2) $ 7,032 $ 22,804 $ 13,412 $ 2,194 (1) Notional amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets. (2) Net derivative assets are included in other assets and net derivative liabilities are included in other liabilities on the consolidated balance sheets. Included in the fair value of net derivative assets and net derivative liabilities are credit valuation adjustments reflecting counterparty credit risk and our credit risk. We had $7.0 million credit exposure related to interest rate swaps with financial institutions and none related to interest rate swaps with customers at September 30, 2022. We had no credit exposure related to interest rate swaps with financial institutions and $13.4 million related to interest rate swaps with customers at December 31, 2021. The credit risk associated with customer transactions is partially mitigated as these are generally secured by the non-cash collateral securing the underlying transaction being hedged. The summarized expected weighted average remaining maturity of the notional amount of interest rate swaps and the weighted average interest rates associated with the amounts expected to be received or paid on interest rate swap agreements are presented below (dollars in thousands). Variable rates received on fixed pay swaps are based on one-month or three-month LIBOR or overnight SOFR rates in effect at September 30, 2022 and December 31, 2021: September 30, 2022 December 31, 2021 Weighted Average Weighted Average Notional Amount Remaining Maturity Receive Rate Pay Rate Notional Amount Remaining Maturity Receive Rate Pay Swaps-Cash Flow hedge Financial institution counterparties $ 575,000 2.6 2.94 % 1.13 % $ 605,000 3.2 0.13 % 1.10 % Swaps-Fair Value hedge Financial institution counterparties 742,675 6.5 2.58 % 3.21 % — — — — Swaps-Non-hedging Financial institution counterparties 229,199 9.1 3.37 % 2.68 % 214,379 10.3 0.47 % 2.42 % Customer counterparties 229,199 9.1 2.68 % 3.37 % 214,379 10.3 2.42 % 0.47 %

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement Fair value is the price that would be received upon the sale of an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants. A fair value measurement assumes the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact. Valuation techniques including the market approach, the income approach and/or the cost approach are utilized to determine fair value. Inputs to valuation techniques refer to the assumptions market participants would use in pricing the asset or liability. Valuation policies and procedures are determined by our investment department and reported to our ALCO for review. An entity must consider all aspects of nonperforming risk, including the entity’s own credit standing, when measuring fair value of a liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. A fair value hierarchy for valuation inputs gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs - Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. Certain financial assets are measured at fair value in accordance with GAAP. Adjustments to the fair value of these assets usually result from the application of fair value accounting or write-downs of individual assets. A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. Securities AFS and Equity Investments with readily determinable fair values – U.S. Treasury securities and equity investments with readily determinable fair values are reported at fair value utilizing Level 1 inputs. Other securities classified as AFS are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from independent pricing services and obtain an understanding of the pricing methodologies used by these independent pricing services. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things, as stated in the pricing methodologies of the independent pricing services. We review and validate the prices supplied by the independent pricing services for reasonableness by comparison to prices obtained from, in some cases, two additional third-party sources. For securities where prices are outside a reasonable range, we further review those securities, based on internal ALCO approved procedures, to determine what a reasonable fair value measurement is for those securities, given available data. Derivatives – Derivatives are reported at fair value utilizing Level 2 inputs. We obtain fair value measurements from two sources including an independent pricing service and the counterparty to the derivatives designated as hedges. The fair value measurements consider observable data that may include dealer quotes, market spreads, the U.S. Treasury yield curve, live trading levels, trade execution data, credit information and the derivatives’ terms and conditions, among other things. We review the prices supplied by the sources for reasonableness. In addition, we obtain a basic understanding of their underlying pricing methodology. We validate prices supplied by the sources by comparison to one another. Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a recurring basis include reporting units measured at fair value and tested for goodwill impairment. Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, which means that the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Financial assets and financial liabilities measured at fair value on a nonrecurring basis included foreclosed assets and collateral-dependent loans at September 30, 2022 and December 31, 2021. Foreclosed Assets – Foreclosed assets are initially recorded at fair value less costs to sell. The fair value measurements of foreclosed assets can include Level 2 measurement inputs such as real estate appraisals and comparable real estate sales information, in conjunction with Level 3 measurement inputs such as cash flow projections, qualitative adjustments and sales cost estimates. As a result, the categorization of foreclosed assets is Level 3 of the fair value hierarchy. In connection with the measurement and initial recognition of certain foreclosed assets, we may recognize charge-offs through the allowance for credit losses. Collateral-Dependent Loans – Certain loans may be reported at the fair value of the underlying collateral if repayment is expected substantially from the operation or sale of the collateral. Collateral values are estimated using Level 3 inputs based on customized discounting criteria or appraisals. At September 30, 2022 and December 31, 2021, the impact of the fair value of collateral-dependent loans was reflected in our allowance for loan losses. The fair value estimate of financial instruments for which quoted market prices are unavailable is dependent upon the assumptions used. Consequently, those estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instruments. Accordingly, the aggregate fair value amounts presented in the fair value tables do not necessarily represent their underlying value. The following tables summarize assets measured at fair value on a recurring and nonrecurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at the End of the Reporting Period Using September 30, 2022 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring fair value measurements Investment securities: State and political subdivisions $ 1,038,332 $ — $ 1,038,332 $ — Corporate bonds and other 57,417 — 57,417 — MBS: (1) Residential 320,368 — 320,368 — Commercial 8,445 — 8,445 — Equity investments: Equity investments 5,224 5,224 — — Derivative assets: Interest rate swaps 88,080 — 88,080 — Total asset recurring fair value measurements $ 1,517,866 $ 5,224 $ 1,512,642 $ — Derivative liabilities: Interest rate swaps $ 22,822 $ — $ 22,822 $ — Total liability recurring fair value measurements $ 22,822 $ — $ 22,822 $ — Nonrecurring fair value measurements Foreclosed assets $ 197 $ — $ — $ 197 Collateral-dependent loans (2) 8,224 — — 8,224 Total asset nonrecurring fair value measurements $ 8,421 $ — $ — $ 8,421 Fair Value Measurements at the End of the Reporting Period Using December 31, 2021 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring fair value measurements Investment securities: U.S. Treasury $ 58,877 $ 58,877 $ — $ — State and political subdivisions 2,051,936 — 2,051,936 — Corporate bonds and other 135,532 — 135,532 — MBS: (1) Residential 426,350 — 426,350 — Commercial 91,630 — 91,630 — Equity investments: Equity investments 5,920 5,920 — — Derivative assets: Interest rate swaps 18,231 — 18,231 — Total asset recurring fair value measurements $ 2,788,476 $ 64,797 $ 2,723,679 $ — Derivative liabilities: Interest rate swaps $ 19,823 $ — $ 19,823 $ — Total liability recurring fair value measurements $ 19,823 $ — $ 19,823 $ — Nonrecurring fair value measurements Collateral-dependent loans (2) $ 8,458 $ — $ — $ 8,458 Total asset nonrecurring fair value measurements $ 8,458 $ — $ — $ 8,458 (1) All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs. (2) Consists of individually evaluated loans. Loans for which the fair value of the collateral and commercial real estate fair value of the properties is less than cost basis are presented net of allowance. Losses on these loans represent charge-offs which are netted against the allowance for loan losses. Disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, is required when it is practicable to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other estimation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Such techniques and assumptions, as they apply to individual categories of our financial instruments, are as follows: Cash and cash equivalents – The carrying amount for cash and cash equivalents is a reasonable estimate of those assets’ fair value. Investment and MBS HTM – Fair values for these securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices for similar securities or estimates from independent pricing services. FHLB stock – The carrying amount of FHLB stock is a reasonable estimate of the fair value of those assets. Equity investments – The carrying value of equity investments without readily determinable fair values are measured at cost less impairment, if any, adjusted for observable price changes for an identical or similar investment of the same issuer. This carrying value is a reasonable estimate of the fair value of those assets. Loans receivable – We estimate the fair value of our loan portfolio to an exit price notion with adjustments for liquidity, credit and prepayment factors. Nonperforming loans continue to be estimated using discounted cash flow analyses or the underlying value of the collateral where applicable. Loans held for sale – The fair value of loans held for sale is determined based on expected proceeds, which are based on sales contracts and commitments. Deposit liabilities – The fair value of demand deposits, savings accounts and certain money market deposits is the amount on demand at the reporting date, which is the carrying value. Fair values for fixed rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered for deposits of similar remaining maturities. Other borrowings – Federal funds purchased generally have original terms to maturity of one day and repurchase agreements generally have terms of less than one year, and therefore both are considered short-term borrowings. Consequently, their carrying value is a reasonable estimate of fair value. FHLB borrowings – The fair value of these borrowings is estimated by discounting the future cash flows using rates at which borrowings would be made to borrowers with similar credit ratings and for the same remaining maturities. Subordinated notes – The fair value of the subordinated notes is estimated by discounting future cash flows using estimated rates at which long-term debt would be made to borrowers with similar credit ratings and for the remaining maturities. Trust preferred subordinated debentures – The fair value of the long-term debt is estimated by discounting future cash flows using estimated rates at which long-term debt would be made to borrowers with similar credit ratings and for the remaining maturities. The following tables present our financial assets and financial liabilities measured on a nonrecurring basis at both their respective carrying amounts and estimated fair value (in thousands): Estimated Fair Value September 30, 2022 Carrying Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 195,127 $ 195,127 $ 195,127 $ — $ — Investment securities: HTM, at carrying value 1,013,674 816,756 — 816,756 — MBS: HTM, at carrying value 137,531 126,566 — 126,566 — FHLB stock, at cost 12,887 12,887 — 12,887 — Equity investments 5,828 5,828 — 5,828 — Loans, net of allowance for loan losses 4,026,989 3,793,430 — — 3,793,430 Loans held for sale 421 421 — 421 — Financial liabilities: Deposits $ 6,181,159 $ 6,126,861 $ — $ 6,126,861 $ — Other borrowings 74,721 74,721 — 74,721 — FHLB borrowings 243,531 243,512 — 243,512 — Subordinated notes, net of unamortized debt issuance costs 98,639 89,214 — 89,214 — Trust preferred subordinated debentures, net of unamortized debt issuance costs 60,264 57,598 — 57,598 — Estimated Fair Value December 31, 2021 Carrying Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 201,753 $ 201,753 $ 201,753 $ — $ — Investment securities: HTM, at carrying value 788 791 — 791 — Mortgage-backed securities: HTM, at carrying value 89,992 94,444 — 94,444 — FHLB stock, at cost 14,375 14,375 — 14,375 — Equity investments 5,921 5,921 — 5,921 — Loans, net of allowance for loan losses 3,609,889 3,748,116 — — 3,748,116 Loans held for sale 1,684 1,684 — 1,684 — Financial liabilities: Deposits $ 5,722,327 $ 5,721,694 $ — $ 5,721,694 $ — Other borrowings 23,219 23,219 — 23,219 — FHLB borrowings 344,038 346,604 — 346,604 — Subordinated notes, net of unamortized debt issuance costs 98,534 98,642 — 98,642 — Trust preferred subordinated debentures, net of unamortized debt issuance costs 60,260 48,480 — 48,480 —

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax expense included in the accompanying consolidated statements of income consists of the following (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Current income tax expense $ 4,415 $ 3,387 $ 10,215 $ 9,002 Deferred income tax expense (benefit) (540) 1,590 103 3,612 Income tax expense $ 3,875 $ 4,977 $ 10,318 $ 12,614 The net deferred tax asset totaled $46.0 million at September 30, 2022 as compared to a net deferred tax liability of $17.8 million at December 31, 2021. The increase in the net deferred tax asset is primarily the result of an increase in unrealized losses in the AFS securities portfolio. No valuation allowance was recorded at September 30, 2022 or December 31, 2021, as management believes it is more likely than not that all of the deferred tax asset items will be realized in future years. Unrecognized tax benefits were not material at September 30, 2022 or December 31, 2021.

Off-Balance-Sheet Arrangements,

Off-Balance-Sheet Arrangements, Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Off-Balance-Sheet Arrangements, Commitments and Contingencies	Off-Balance-Sheet Arrangements, Commitments and Contingencies Financial Instruments with Off-Balance-Sheet Risk . In the normal course of business, we are a party to certain financial instruments with off-balance-sheet risk to meet the financing needs of our customers. These off-balance-sheet instruments include commitments to extend credit and standby letters of credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount reflected in the financial statements. The contract or notional amounts of these instruments reflect the extent of involvement and exposure to credit loss that we have in these particular classes of financial instruments. The allowance for credit losses on these off-balance-sheet credit exposures is calculated using the same methodology as loans including a conversion or usage factor to anticipate ultimate exposure and expected losses and is included in other liabilities on our consolidated balance sheets. Allowance for off-balance-sheet credit exposures were as follows (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Balance at beginning of period $ 1,891 $ 3,773 $ 2,384 $ 6,386 Provision for (reversal of) off-balance-sheet credit exposures 200 (683) (293) (3,296) Balance at end of period $ 2,091 $ 3,090 $ 2,091 $ 3,090 Contractual commitments to extend credit are agreements to lend to a customer provided the terms established in the contract are met. Commitments to extend credit generally have fixed expiration dates and may require the payment of fees. Since some commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in commitments to extend credit and similarly do not necessarily represent future cash obligations. Financial instruments with off-balance-sheet risk were as follows (in thousands): September 30, 2022 December 31, 2021 Commitments to extend credit $ 1,223,284 $ 1,053,002 Standby letters of credit 14,719 12,708 Total $ 1,238,003 $ 1,065,710 We apply the same credit policies in making commitments to extend credit and standby letters of credit as we do for on-balance-sheet instruments. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary, upon extension of credit is based on management’s credit evaluation of the borrower. Collateral held varies but may include cash or cash equivalents, negotiable instruments, real estate, accounts receivable, inventory, oil, gas and mineral interests, property, plant and equipment. Leases . During both the three and nine months ended September 30, 2022, there were $1.5 million operating lease ROU assets obtained in exchange for new operating lease liabilities. During the three and nine months ended September 30, 2021, there were $240,000 and $1.3 million, respectively, of operating lease ROU assets obtained in exchange for new operating lease liabilities, primarily due to one lease that commenced in January 2021 with an initial ROU asset of $1.1 million. Securities . In the normal course of business we buy and sell securities. At September 30, 2022, there were no unsettled trades to purchase securities and no unsettled trades to sell securities. At December 31, 2021, there were $19.0 million unsettled trades to purchase securities and no unsettled trades to sell securities. Deposits . There were $28.5 million unsettled issuances of brokered CDs at September 30, 2022. There were no unsettled issuances of brokered CDs at December 31, 2021. Litigation . We are involved with various litigation in the normal course of business. Management, after consulting with our legal counsel, believes that any liability resulting from litigation will not have a material effect on our financial position, results of operations or liquidity.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsSubsequent to September 30, 2022, on October 27, 2022, we purchased 21,935 shares of common stock at an average price of $33.37 pursuant to the Stock Repurchase Plan.Subsequent to September 30, 2022, on October 4, 2022, we transferred municipal securities and corporate bonds with fair values of approximately $118.9 million and $56.9 million, respectively, to HTM. All transfers from AFS to HTM were at the fair market value on the date of transfer. There was no impact to the income statement as a result of these transfers.

Summary of Significant Accoun_2

Summary of Significant Accounting and Reporting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation In this report, the words “the Company,” “we,” “us,” and “our” refer to the combined entities of Southside Bancshares, Inc. and its subsidiaries, including Southside Bank. The words “Southside” and “Southside Bancshares” refer to Southside Bancshares, Inc. The words “Southside Bank” and “the Bank” refer to Southside Bank. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, not all information required by GAAP for complete financial statements is included in these interim statements. In the opinion of management, all adjustments necessary for a fair presentation of such financial statements have been included. Such adjustments consisted only of normal recurring items. The preparation of these consolidated financial statements in accordance with GAAP requires the use of management’s estimates. These estimates are subjective in nature and involve matters of judgment. Actual amounts could differ from these estimates.
Reclassifications	Certain prior period amounts may be reclassified to conform to current year presentation.
Accounting Changes and Reclassifications and Accounting Pronouncements	Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide relief for companies preparing for discontinuation of interest rates based on LIBOR. The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued. ASU 2020-04 also provides for a one-time sale and/or transfer to AFS or trading to be made for HTM debt securities that both reference an eligible reference rate and were classified as HTM before January 1, 2020. ASU 2020-04 was effective for all entities as of March 12, 2020 and through December 31, 2022. Companies can apply the ASU as of the beginning of the interim period that includes March 12, 2020 or any date thereafter. The guidance requires companies to apply the guidance prospectively to contract modifications and hedging relationships while the one-time election to sell and/or transfer debt securities classified as HTM may be made any time after March 12, 2020. Additionally, in January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope,” which provided additional clarification that certain optional expedients and exceptions noted above apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. We established an officer level committee to guide our transition from LIBOR in October 2019 and are transitioning to alternative rates consistent with industry timelines. We continue to evaluate our LIBOR exposure, and note that we have the option to have certain of our interest rate swaps fall back to an adjusted SOFR index. Additionally, we anticipate the trust preferred subordinated debentures will transition to a SOFR index once the Federal Reserve completes the relevant rule. We have identified our products that utilize LIBOR and have implemented enhanced fallback language to facilitate the transition to alternative reference rates. We are evaluating existing systems and have begun offering alternative rates. We are no longer offering LIBOR indexed rates on newly originated loans. ASU 2020-04 and ASU 2021-01 are not expected to have a material impact on our consolidated financial statements. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminates the accounting guidance for TDRs, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance to determine whether a modification results in a new loan or a continuation of an existing loan. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost. ASU 2022-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022 for companies that have adopted CECL, which we adopted on January 1, 2020. Early adoption is permitted. The guidance should be applied prospectively with the option to use a modified retrospective transition method for the recognition

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Earnings Per Share [Abstract]
Earnings per share on a basic and diluted basis	Earnings per share on a basic and diluted basis are calculated as follows (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Basic and Diluted Earnings: Net income $ 26,951 $ 29,306 $ 77,352 $ 84,714 Basic weighted-average shares outstanding 32,112 32,465 32,195 32,641 Add: Stock awards 109 91 146 118 Diluted weighted-average shares outstanding 32,221 32,556 32,341 32,759 Basic earnings per share: Net income $ 0.84 $ 0.90 $ 2.40 $ 2.60 Diluted earnings per share: Net income $ 0.84 $ 0.90 $ 2.39 $ 2.59

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of accumulated other comprehensive income (loss) by component	The changes in accumulated other comprehensive income (loss) by component are as follows (in thousands): Three Months Ended September 30, 2022 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ (137,792) $ 21,857 $ (23,400) $ (139,335) Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (67,721) 15,226 — (52,495) Reclassification adjustments included in net income 1,495 (1,572) 224 147 Income tax (expense) benefit 13,908 (2,868) (47) 10,993 Net current-period other comprehensive income (loss), net of tax (52,318) 10,786 177 (41,355) Ending balance, net of tax $ (190,110) $ 32,643 $ (23,223) $ (180,690) Nine Months Ended September 30, 2022 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 84,716 $ (1,257) $ (23,754) $ 59,705 Other comprehensive income (loss): Other comprehensive (loss) income before reclassifications (354,649) 42,819 — (311,830) Reclassification adjustments included in net income 6,768 94 671 7,533 Income tax (expense) benefit 73,055 (9,013) (140) 63,902 Net current-period other comprehensive income (loss), net of tax (274,826) 33,900 531 (240,395) Ending balance, net of tax $ (190,110) $ 32,643 $ (23,223) $ (180,690) Three Months Ended September 30, 2021 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 102,628 $ (8,334) $ (29,407) $ 64,887 Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (27,714) 377 — (27,337) Reclassification adjustments included in net income (1,069) 1,617 316 864 Income tax (expense) benefit 6,045 (418) (67) 5,560 Net current-period other comprehensive income (loss), net of tax (22,738) 1,576 249 (20,913) Ending balance, net of tax $ 79,890 $ (6,758) $ (29,158) $ 43,974 Nine Months Ended September 30, 2021 Unrealized Gains (Losses) on Securities Unrealized Gains (Losses) on Derivatives Retirement Plans Total Beginning balance, net of tax $ 116,078 $ (17,091) $ (29,907) $ 69,080 Other comprehensive income (loss): Other comprehensive income (loss) before reclassifications (43,527) 8,296 — (35,231) Reclassification adjustments included in net income (2,281) 4,784 948 3,451 Income tax (expense) benefit 9,620 (2,747) (199) 6,674 Net current-period other comprehensive income (loss), net of tax (36,188) 10,333 749 (25,106) Ending balance, net of tax $ 79,890 $ (6,758) $ (29,158) $ 43,974
Reclassifications out of accumulated other comprehensive income	The reclassification adjustments out of accumulated other comprehensive income (loss) included in net income are presented below (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Unrealized gains and losses on securities transferred: Amortization of unrealized gains and losses (1) $ (1,396) $ (312) $ (2,949) $ (1,118) Tax benefit 293 66 619 235 Net of tax (1,103) (246) (2,330) (883) Unrealized gains and losses on available for sale securities: Realized net gain (loss) on sale of securities (2) (99) 1,381 (3,819) 3,399 Tax (expense) benefit 21 (290) 802 (714) Net of tax (78) 1,091 (3,017) 2,685 Derivatives: Realized net gain (loss) on interest rate swap derivatives (3) 1,572 (1,617) (94) (4,784) Tax benefit (330) 340 20 1,005 Net of tax 1,242 (1,277) (74) (3,779) Amortization of pension plan: Net actuarial loss (4) (224) (316) (671) (948) Tax benefit 47 67 140 199 Net of tax (177) (249) (531) (749) Total reclassifications for the period, net of tax $ (116) $ (681) $ (5,952) $ (2,726) (1) Included in interest income on the consolidated statements of income. (2) Listed as net gain (loss) on sale of securities AFS on the consolidated statements of income. (3) Included in interest expense for FHLB borrowings and deposits on the consolidated statements of income. (4) These AOCI components are included in the computation of net periodic pension cost (income) presented in “Note 8 – Employee Benefit Plans.”

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Amortized cost and estimated fair value of investment and mortgage-backed securities	The amortized cost, gross unrealized gains and losses and estimated fair value of investment and mortgage-backed AFS and HTM securities as of September 30, 2022 and December 31, 2021 are reflected in the tables below (in thousands): September 30, 2022 Amortized Gross Unrealized Gross Unrealized Estimated AVAILABLE FOR SALE Cost Gains Losses Fair Value Investment securities: State and political subdivisions $ 1,186,010 $ 26 $ 147,704 $ 1,038,332 Corporate bonds and other 60,144 67 2,794 57,417 MBS: (1) Residential 337,189 263 17,084 320,368 Commercial 9,548 — 1,103 8,445 Total $ 1,592,891 $ 356 $ 168,685 $ 1,424,562 HELD TO MATURITY Investment securities: State and political subdivisions $ 918,216 $ — $ 190,841 $ 727,375 Corporate bonds and other 95,458 — 6,077 89,381 MBS: (1) Residential 94,539 22 8,383 86,178 Commercial 42,992 — 2,604 40,388 Total $ 1,151,205 $ 22 $ 207,905 $ 943,322 December 31, 2021 Amortized Gross Unrealized Gross Unrealized Estimated AVAILABLE FOR SALE Cost Gains Losses Fair Value Investment securities: U.S. Treasury $ 58,084 $ 843 $ 50 $ 58,877 State and political subdivisions 1,962,257 93,893 4,214 2,051,936 Corporate bonds and other 133,333 2,408 209 135,532 MBS: (1) Residential 411,727 14,895 272 426,350 Commercial 90,193 1,642 205 91,630 Total $ 2,655,594 $ 113,681 $ 4,950 $ 2,764,325 HELD TO MATURITY Investment securities: State and political subdivisions $ 788 $ 3 $ — $ 791 MBS: (1) Residential 38,644 2,103 — 40,747 Commercial 51,348 2,349 — 53,697 Total $ 90,780 $ 4,455 $ — $ 95,235 (1) All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs.
Unrealized loss on securities	The following tables present the fair value and unrealized losses on AFS and HTM investment securities and MBS, if applicable, for which an allowance for credit losses has not been recorded as of September 30, 2022 and December 31, 2021, segregated by major security type and length of time in a continuous loss position (in thousands): September 30, 2022 Less Than 12 Months More Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss AVAILABLE FOR SALE Investment securities: State and political subdivisions $ 1,026,787 $ 146,634 $ 3,862 $ 1,070 $ 1,030,649 $ 147,704 Corporate bonds and other 53,381 2,794 — — 53,381 2,794 MBS: Residential 307,521 17,084 — — 307,521 17,084 Commercial 5,666 344 2,779 759 8,445 1,103 Total $ 1,393,355 $ 166,856 $ 6,641 $ 1,829 $ 1,399,996 $ 168,685 HELD TO MATURITY Investment securities: State and political subdivisions $ 644,238 $ 161,326 $ 83,137 $ 29,515 $ 727,375 $ 190,841 Corporate bonds and other 87,630 5,939 1,751 138 89,381 6,077 MBS: Residential 81,422 7,809 3,935 574 85,357 8,383 Commercial 40,388 2,604 — — 40,388 2,604 Total $ 853,678 $ 177,678 $ 88,823 $ 30,227 $ 942,501 $ 207,905 December 31, 2021 Less Than 12 Months More Than 12 Months Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized AVAILABLE FOR SALE Investment securities: U.S. Treasury $ 9,947 $ 50 $ — $ — $ 9,947 $ 50 State and political subdivisions 260,509 3,622 7,608 592 268,117 4,214 Corporate bonds and other 35,597 209 — — 35,597 209 MBS: Residential 1,225 3 5,168 269 6,393 272 Commercial 4,274 7 4,674 198 8,948 205 Total $ 311,552 $ 3,891 $ 17,450 $ 1,059 $ 329,002 $ 4,950
Interest income recognized on securities	The following table reflects interest income recognized on securities for the periods presented (in thousands): Three Months Ended 2022 2021 U.S. Treasury $ 44 $ 182 State and political subdivisions 14,666 12,223 Corporate bonds and other 1,668 1,097 MBS 4,770 4,405 Total interest income on securities $ 21,148 $ 17,907 Nine Months Ended 2022 2021 U.S. Treasury $ 271 $ 388 State and political subdivisions 41,786 33,568 Corporate bonds and other 4,385 2,928 MBS 12,025 15,140 Total interest income on securities $ 58,467 $ 52,024
Amortized cost, carrying value and fair value of securities presented by contractual maturity	The amortized cost and estimated fair value of AFS and HTM securities at September 30, 2022, are presented below by contractual maturity (in thousands): September 30, 2022 Amortized Cost Fair Value AVAILABLE FOR SALE Investment securities: Due in one year or less $ 528 $ 529 Due after one year through five years 21,668 21,154 Due after five years through ten years 96,779 93,415 Due after ten years 1,127,179 980,651 1,246,154 1,095,749 MBS: 346,737 328,813 Total $ 1,592,891 $ 1,424,562 September 30, 2022 Amortized Cost Fair Value HELD TO MATURITY Investment securities: Due in one year or less $ 125 $ 123 Due after one year through five years 1,039 1,016 Due after five years through ten years 100,463 94,140 Due after ten years 912,047 721,477 1,013,674 816,756 MBS: 137,531 126,566 Total $ 1,151,205 $ 943,322
Unrealized and realized gains (losses) recognized in net income on equity investments	The following is a summary of unrealized and realized gains and losses on equity investments recognized in other noninterest income in the consolidated statements of income during the periods presented (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Net gains (losses) recognized during the period on equity investments $ (230) $ (28) $ (696) $ (118) Less: Net gains recognized during the period on equity investments sold during the period — — — — Unrealized gains (losses) recognized during the reporting period on equity investments held at the reporting date $ (230) $ (28) $ (696) $ (118)

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2022
Receivables [Abstract]
Loans by Portfolio Segment	Loans in the accompanying consolidated balance sheets are classified as follows (in thousands): September 30, 2022 December 31, 2021 Real estate loans: Construction $ 554,345 $ 447,860 1-4 family residential 646,692 651,140 Commercial 1,901,921 1,598,172 Commercial loans 433,538 418,998 Municipal loans 449,219 443,078 Loans to individuals 77,780 85,914 Total loans 4,063,495 3,645,162 Less: Allowance for loan losses 36,506 35,273 Net loans $ 4,026,989 $ 3,609,889
Summary of loans by credit quality indicators and origination year	The following tables set forth the amortized cost basis by class of financing receivable and credit quality indicator for the periods presented (in thousands): September 30, 2022 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total 2022 2021 2020 2019 2018 Prior Construction real estate: Pass $ 127,074 $ 200,310 $ 40,301 $ 9,256 $ 1,918 $ 6,813 $ 165,829 $ 551,501 Pass watch — — — — — — — — Special mention 1,830 305 — — — — — 2,135 Substandard — — — 389 45 229 — 663 Doubtful — 46 — — — — — 46 Total construction real estate $ 128,904 $ 200,661 $ 40,301 $ 9,645 $ 1,963 $ 7,042 $ 165,829 $ 554,345 1-4 family residential real estate: Pass $ 91,723 $ 127,248 $ 112,796 $ 68,045 $ 37,349 $ 202,116 $ 2,190 $ 641,467 Pass watch — — — — — — — — Special mention — — 80 — 1,414 — — 1,494 Substandard 4 — 396 160 184 2,531 42 3,317 Doubtful — — — — 178 236 — 414 Total 1-4 family residential real estate $ 91,727 $ 127,248 $ 113,272 $ 68,205 $ 39,125 $ 204,883 $ 2,232 $ 646,692 Commercial real estate: Pass $ 664,538 $ 579,040 $ 170,699 $ 138,748 $ 56,168 $ 241,718 $ 11,944 $ 1,862,855 Pass watch — 9,434 — — — 1,771 — 11,205 Special mention — — 1,844 333 116 1,898 — 4,191 Substandard 596 — 285 14,699 263 7,620 — 23,463 Doubtful — — — 78 — 129 — 207 Total commercial real estate $ 665,134 $ 588,474 $ 172,828 $ 153,858 $ 56,547 $ 253,136 $ 11,944 $ 1,901,921 Commercial loans: Pass $ 105,247 $ 76,210 $ 20,852 $ 9,369 $ 5,792 $ 3,680 $ 164,967 $ 386,117 Pass watch 217 6 — 247 — — 27,452 27,922 Special mention — 5,183 34 — 307 — 12,742 18,266 Substandard — 16 72 122 37 9 74 330 Doubtful 68 328 17 195 240 55 — 903 Total commercial loans $ 105,532 $ 81,743 $ 20,975 $ 9,933 $ 6,376 $ 3,744 $ 205,235 $ 433,538 Municipal loans: Pass $ 49,215 $ 75,567 $ 58,288 $ 56,151 $ 26,141 $ 183,857 $ — $ 449,219 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total municipal loans $ 49,215 $ 75,567 $ 58,288 $ 56,151 $ 26,141 $ 183,857 $ — $ 449,219 Loans to individuals: Pass $ 25,795 $ 24,290 $ 15,004 $ 6,515 $ 1,994 $ 1,285 $ 2,838 $ 77,721 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — 1 — 10 40 4 1 56 Doubtful — — — — — 3 — 3 Total loans to individuals $ 25,795 $ 24,291 $ 15,004 $ 6,525 $ 2,034 $ 1,292 $ 2,839 $ 77,780 Total loans $ 1,066,307 $ 1,097,984 $ 420,668 $ 304,317 $ 132,186 $ 653,954 $ 388,079 $ 4,063,495 December 31, 2021 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total 2021 2020 2019 2018 2017 Prior Construction real estate: Pass $ 179,521 $ 82,862 $ 38,788 $ 5,666 $ 2,126 $ 6,080 $ 132,592 $ 447,635 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — 175 — 175 Doubtful — — — 50 — — — 50 Total construction real estate $ 179,521 $ 82,862 $ 38,788 $ 5,716 $ 2,126 $ 6,255 $ 132,592 $ 447,860 1-4 family residential real estate: Pass $ 141,058 $ 129,681 $ 81,607 $ 47,566 $ 34,236 $ 209,470 $ 2,238 $ 645,856 Pass watch — — — — — 777 — 777 Special mention — 82 — — — — — 82 Substandard 57 403 55 — 295 3,257 88 4,155 Doubtful — — — — — 270 — 270 Total 1-4 family residential real estate $ 141,115 $ 130,166 $ 81,662 $ 47,566 $ 34,531 $ 213,774 $ 2,326 $ 651,140 Commercial real estate: Pass $ 648,002 $ 207,370 $ 209,923 $ 114,788 $ 143,350 $ 209,368 $ 7,566 $ 1,540,367 Pass watch 21,669 — 2,163 3,074 374 — — 27,280 Special mention — 2,062 2,217 119 163 1,877 — 6,438 Substandard 3,299 667 10,830 1,480 — 7,691 — 23,967 Doubtful — — — — — 120 — 120 Total commercial real estate $ 672,970 $ 210,099 $ 225,133 $ 119,461 $ 143,887 $ 219,056 $ 7,566 $ 1,598,172 Commercial loans: Pass $ 140,628 $ 51,866 $ 24,688 $ 13,204 $ 2,516 $ 4,062 $ 178,263 $ 415,227 Pass watch — — 280 22 — — — 302 Special mention — 57 78 363 — 157 — 655 Substandard — 283 296 174 16 — 1,457 2,226 Doubtful 7 26 124 359 — 72 — 588 Total commercial loans $ 140,635 $ 52,232 $ 25,466 $ 14,122 $ 2,532 $ 4,291 $ 179,720 $ 418,998 Municipal loans: Pass $ 80,167 $ 64,803 $ 61,348 $ 29,168 $ 56,274 $ 151,318 $ — $ 443,078 Pass watch — — — — — — — — Special mention — — — — — — — — Substandard — — — — — — — — Doubtful — — — — — — — — Total municipal loans $ 80,167 $ 64,803 $ 61,348 $ 29,168 $ 56,274 $ 151,318 $ — $ 443,078 Loans to individuals: Pass $ 40,252 $ 24,028 $ 11,813 $ 4,121 $ 1,684 $ 849 $ 3,052 $ 85,799 Pass watch — — — — — — — — Special mention — — — 36 — — — 36 Substandard — 1 24 4 23 10 2 64 Doubtful — — 1 7 3 4 — 15 Total loans to individuals $ 40,252 $ 24,029 $ 11,838 $ 4,168 $ 1,710 $ 863 $ 3,054 $ 85,914 Total loans $ 1,254,660 $ 564,191 $ 444,235 $ 220,201 $ 241,060 $ 595,557 $ 325,258 $ 3,645,162
Aging of past due loans by class of loan	The following tables present the aging of the amortized cost basis in past due loans by class of loans (in thousands): September 30, 2022 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Past Due Total Past Due Current Total Real estate loans: Construction $ 160 $ 410 $ 46 $ 616 $ 553,729 $ 554,345 1-4 family residential 1,367 547 516 2,430 644,262 646,692 Commercial 243 422 — 665 1,901,256 1,901,921 Commercial loans 1,094 794 434 2,322 431,216 433,538 Municipal loans — — — — 449,219 449,219 Loans to individuals 208 — — 208 77,572 77,780 Total $ 3,072 $ 2,173 $ 996 $ 6,241 $ 4,057,254 $ 4,063,495 December 31, 2021 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Real estate loans: Construction $ 82 $ 58 $ — $ 140 $ 447,720 $ 447,860 1-4 family residential 3,226 606 227 4,059 647,081 651,140 Commercial 1,191 — 99 1,290 1,596,882 1,598,172 Commercial loans 1,523 251 537 2,311 416,687 418,998 Municipal loans 170 — — 170 442,908 443,078 Loans to individuals 315 41 8 364 85,550 85,914 Total $ 6,507 $ 956 $ 871 $ 8,334 $ 3,636,828 $ 3,645,162
Nonperforming assets by asset class	The following table sets forth the amortized cost basis of nonperforming assets for the periods presented (in thousands): September 30, 2022 December 31, 2021 Nonaccrual loans: Real estate loans: Construction $ 77 $ 57 1-4 family residential 1,183 969 Commercial 696 668 Commercial loans 1,071 815 Loans to individuals 12 27 Total nonaccrual loans (1) 3,039 2,536 Accruing loans past due more than 90 days — — TDR loans 8,481 9,073 OREO 162 — Repossessed assets 35 — Total nonperforming assets $ 11,717 $ 11,609 (1) Includes $950,000 and $1.1 million of TDR loans as of September 30, 2022 and December 31, 2021, respectively.
Troubled debt restructurings	The following tables set forth the recorded balance of loans considered to be TDRs that were restructured and the type of concession by class of loans during the periods presented (dollars in thousands): Nine Months Ended September 30, 2022 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 307 $ 307 4 Commercial loans — — 5 5 1 Loans to individuals — — 9 9 2 Total $ — $ — $ 321 $ 321 7 Three Months Ended September 30, 2021 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 219 $ 219 3 Commercial — — 453 453 1 Total $ — $ — $ 672 $ 672 4 Nine Months Ended September 30, 2021 Extend Amortization Period Interest Rate Reductions Combination Total Modifications Number of Loans Real estate loans: 1-4 family residential $ — $ — $ 344 $ 344 5 Commercial — — 453 453 1 Commercial loans — 16 94 110 3 Total $ — $ 16 $ 891 $ 907 9
Allowance for loan losses activity by portfolio segment	The following tables detail activity in the allowance for loan losses by portfolio segment for the periods presented (in thousands): Three Months Ended September 30, 2022 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 3,399 $ 2,024 $ 27,221 $ 2,558 $ 46 $ 201 $ 35,449 Loans charged-off — (66) — (192) — (428) (686) Recoveries of loans charged-off — 4 — 139 — 306 449 Net loans (charged-off) recovered — (62) — (53) — (122) (237) Provision for (reversal of) loan losses 136 44 1,273 (272) (2) 115 1,294 Balance at end of period $ 3,535 $ 2,006 $ 28,494 $ 2,233 $ 44 $ 194 $ 36,506 Nine Months Ended September 30, 2022 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 3,787 $ 1,866 $ 26,980 $ 2,397 $ 47 $ 196 $ 35,273 Loans charged-off — (66) — (369) — (1,285) (1,720) Recoveries of loans charged-off 1 96 81 469 — 858 1,505 Net loans (charged-off) recovered 1 30 81 100 — (427) (215) Provision for (reversal of) loan losses (253) 110 1,433 (264) (3) 425 1,448 Balance at end of period $ 3,535 $ 2,006 $ 28,494 $ 2,233 $ 44 $ 194 $ 36,506 Three Months Ended September 30, 2021 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 8,018 $ 2,520 $ 28,930 $ 3,097 $ 47 $ 301 $ 42,913 Loans charged-off — (35) — (508) — (397) (940) Recoveries of loans charged-off 1 4 12 74 — 346 437 Net loans (charged-off) recovered 1 (31) 12 (434) — (51) (503) Provision for (reversal of) loan losses (3,036) (543) (684) (103) (1) (21) (4,388) Balance at end of period $ 4,983 $ 1,946 $ 28,258 $ 2,560 $ 46 $ 229 $ 38,022 Nine Months Ended September 30, 2021 Real Estate Construction 1-4 Family Residential Commercial Commercial Loans Municipal Loans Loans to Individuals Total Balance at beginning of period $ 6,490 $ 2,270 $ 35,709 $ 4,107 $ 46 $ 384 $ 49,006 Loans charged-off — (136) — (943) — (1,183) (2,262) Recoveries of loans charged-off 2 71 13 535 — 904 1,525 Net loans (charged-off) recovered 2 (65) 13 (408) — (279) (737) Provision for (reversal of) loan losses (1,509) (259) (7,464) (1,139) — 124 (10,247) Balance at end of period $ 4,983 $ 1,946 $ 28,258 $ 2,560 $ 46 $ 229 $ 38,022

Borrowing Arrangements (Tables)

Borrowing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Debt	Information related to borrowings is provided in the table below (dollars in thousands): September 30, 2022 December 31, 2021 Other borrowings: Balance at end of period $ 74,721 $ 23,219 Average amount outstanding during the period (1) 62,814 22,257 Maximum amount outstanding during the period (2) 248,592 24,549 Weighted average interest rate during the period (3) 1.7 % 0.2 % Interest rate at end of period (4) 2.1 % 0.2 % FHLB borrowings: Balance at end of period $ 243,531 $ 344,038 Average amount outstanding during the period (1) 117,724 665,384 Maximum amount outstanding during the period (2) 423,645 723,584 Weighted average interest rate during the period (3) 1.9 % 1.1 % Interest rate at end of period (5) 3.1 % 1.3 % (1) The average amount outstanding during the period was computed by dividing the total daily outstanding principal balances by the number of days in the period. (2) The maximum amount outstanding at any month-end during the period. (3) The weighted average interest rate during the period was computed by dividing the actual interest expense (annualized for interim periods) by the average amount outstanding during the period. The weighted average interest rate on the FHLB borrowings includes the effect of interest rate swaps. (4) Stated rate. (5) As of December 31, 2021, the interest rate on the FHLB borrowings includes the effect of interest rate swaps.
Schedule of Maturities of Borrowings	Maturities of the obligations associated with our borrowing arrangements based on scheduled repayments at September 30, 2022 are as follows (in thousands): Payments Due by Period Less than 1-2 Years 2-3 Years 3-4 Years 4-5 Years Thereafter Total Other borrowings $ 72,021 $ 2,700 $ — $ — $ — $ — $ 74,721 FHLB borrowings 240,702 733 764 582 401 349 243,531 Total obligations $ 312,723 $ 3,433 $ 764 $ 582 $ 401 $ 349 $ 318,252

Long-term Debt (Tables)

Long-term Debt (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Information related to our long-term debt is summarized as follows for the periods presented (in thousands): September 30, 2022 December 31, 2021 Subordinated notes: (1) 3.875% Subordinated notes, net of unamortized debt issuance costs (2) $ 98,639 $ 98,534 Total Subordinated notes 98,639 98,534 Trust preferred subordinated debentures: (3) Southside Statutory Trust III, net of unamortized debt issuance costs (4) 20,572 20,568 Southside Statutory Trust IV 23,196 23,196 Southside Statutory Trust V 12,887 12,887 Magnolia Trust Company I 3,609 3,609 Total Trust preferred subordinated debentures 60,264 60,260 Total Long-term debt $ 158,903 $ 158,794 (1) This debt consists of subordinated notes with a remaining maturity greater than one year that qualify under the risk-based capital guidelines as Tier 2 capital, subject to certain limitations. (2) The unamortized discount and debt issuance costs reflected in the carrying amount of the subordinated notes totaled approximately $1.4 million at September 30, 2022 and $1.5 million at December 31, 2021. (3) This debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.
Schedule of Subordinated Borrowing	As of September 30, 2022, the details of the subordinated notes and the trust preferred subordinated debentures are summarized below (dollars in thousands): Date Issued Amount Issued Fixed or Floating Rate Interest Rate Maturity Date 3.875% Subordinated Notes November 6, 2020 $ 100,000 Fixed-to-Floating 3.875% November 15, 2030 Southside Statutory Trust III September 4, 2003 $ 20,619 Floating 3 month LIBOR + 2.94% September 4, 2033 Southside Statutory Trust IV August 8, 2007 $ 23,196 Floating 3 month LIBOR + 1.30% October 30, 2037 Southside Statutory Trust V August 10, 2007 $ 12,887 Floating 3 month LIBOR + 2.25% September 15, 2037 Magnolia Trust Company I (1) May 20, 2005 $ 3,609 Floating 3 month LIBOR + 1.80% November 23, 2035

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
The components of net periodic benefit cost	The components of net periodic benefit cost (income) related to our employee benefit plans are as follows (in thousands): Three Months Ended September 30, Retirement Plan Acquired Retirement Plan Restoration 2022 2021 2022 2021 2022 2021 Interest cost $ 685 $ 642 $ 25 $ 23 $ 144 $ 130 Expected return on assets (1,461) (1,355) (58) (53) — — Net loss amortization 160 251 — 1 64 64 Net periodic benefit cost (income) $ (616) $ (462) $ (33) $ (29) $ 208 $ 194 Nine Months Ended September 30, Defined Benefit Defined Benefit Restoration 2022 2021 2022 2021 2022 2021 Interest cost $ 2,056 $ 1,927 $ 76 $ 69 $ 433 $ 390 Expected return on assets (4,384) (4,065) (174) (158) — — Net loss amortization 480 752 — 4 191 192 Net periodic benefit cost (income) $ (1,848) $ (1,386) $ (98) $ (85) $ 624 $ 582

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following tables present the notional and estimated fair value amount of derivative positions outstanding (in thousands): September 30, 2022 December 31, 2021 Estimated Fair Value Estimated Fair Value Notional (1) Asset Derivative Liability Derivative Notional (1) Asset Derivative Liability Derivative Derivatives designated as hedging instruments Interest rate contracts: Swaps-Cash Flow Hedge-Financial institution counterparties $ 575,000 $ 41,320 $ — $ 605,000 $ 4,274 $ 5,866 Swaps-Fair Value Hedge-Financial institution counterparties 742,675 23,956 18 — — — Derivatives designated as non-hedging instruments Interest rate contracts: Swaps-Financial institution counterparties 229,199 22,804 — 214,379 545 13,412 Swaps-Customer counterparties 229,199 — 22,804 214,379 13,412 545 Gross derivatives 88,080 22,822 18,231 19,823 Offsetting derivative assets/liabilities (18) (18) (4,819) (4,819) Cash collateral received/posted (81,030) — — (12,810) Net derivatives included in the consolidated balance sheets (2) $ 7,032 $ 22,804 $ 13,412 $ 2,194 (1) Notional amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets.
Weighted Average Maturity And Interest Rates On Risk Management Interest Rate Swaps	The summarized expected weighted average remaining maturity of the notional amount of interest rate swaps and the weighted average interest rates associated with the amounts expected to be received or paid on interest rate swap agreements are presented below (dollars in thousands). Variable rates received on fixed pay swaps are based on one-month or three-month LIBOR or overnight SOFR rates in effect at September 30, 2022 and December 31, 2021: September 30, 2022 December 31, 2021 Weighted Average Weighted Average Notional Amount Remaining Maturity Receive Rate Pay Rate Notional Amount Remaining Maturity Receive Rate Pay Swaps-Cash Flow hedge Financial institution counterparties $ 575,000 2.6 2.94 % 1.13 % $ 605,000 3.2 0.13 % 1.10 % Swaps-Fair Value hedge Financial institution counterparties 742,675 6.5 2.58 % 3.21 % — — — — Swaps-Non-hedging Financial institution counterparties 229,199 9.1 3.37 % 2.68 % 214,379 10.3 0.47 % 2.42 % Customer counterparties 229,199 9.1 2.68 % 3.37 % 214,379 10.3 2.42 % 0.47 %

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Summary of fair value measurement on recurring and nonrecurring basis segregated by level of valuation inputs within fair value hierarchy utilized to measure fair value	The following tables summarize assets measured at fair value on a recurring and nonrecurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at the End of the Reporting Period Using September 30, 2022 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring fair value measurements Investment securities: State and political subdivisions $ 1,038,332 $ — $ 1,038,332 $ — Corporate bonds and other 57,417 — 57,417 — MBS: (1) Residential 320,368 — 320,368 — Commercial 8,445 — 8,445 — Equity investments: Equity investments 5,224 5,224 — — Derivative assets: Interest rate swaps 88,080 — 88,080 — Total asset recurring fair value measurements $ 1,517,866 $ 5,224 $ 1,512,642 $ — Derivative liabilities: Interest rate swaps $ 22,822 $ — $ 22,822 $ — Total liability recurring fair value measurements $ 22,822 $ — $ 22,822 $ — Nonrecurring fair value measurements Foreclosed assets $ 197 $ — $ — $ 197 Collateral-dependent loans (2) 8,224 — — 8,224 Total asset nonrecurring fair value measurements $ 8,421 $ — $ — $ 8,421 Fair Value Measurements at the End of the Reporting Period Using December 31, 2021 Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring fair value measurements Investment securities: U.S. Treasury $ 58,877 $ 58,877 $ — $ — State and political subdivisions 2,051,936 — 2,051,936 — Corporate bonds and other 135,532 — 135,532 — MBS: (1) Residential 426,350 — 426,350 — Commercial 91,630 — 91,630 — Equity investments: Equity investments 5,920 5,920 — — Derivative assets: Interest rate swaps 18,231 — 18,231 — Total asset recurring fair value measurements $ 2,788,476 $ 64,797 $ 2,723,679 $ — Derivative liabilities: Interest rate swaps $ 19,823 $ — $ 19,823 $ — Total liability recurring fair value measurements $ 19,823 $ — $ 19,823 $ — Nonrecurring fair value measurements Collateral-dependent loans (2) $ 8,458 $ — $ — $ 8,458 Total asset nonrecurring fair value measurements $ 8,458 $ — $ — $ 8,458 (1) All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs. (2) Consists of individually evaluated loans. Loans for which the fair value of the collateral and commercial real estate fair value of the properties is less than cost basis are presented net of allowance. Losses on these loans represent charge-offs which are netted against the allowance for loan losses.
Financial assets, financial liabilities, and unrecognized financial instruments at carrying amount and fair value	The following tables present our financial assets and financial liabilities measured on a nonrecurring basis at both their respective carrying amounts and estimated fair value (in thousands): Estimated Fair Value September 30, 2022 Carrying Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 195,127 $ 195,127 $ 195,127 $ — $ — Investment securities: HTM, at carrying value 1,013,674 816,756 — 816,756 — MBS: HTM, at carrying value 137,531 126,566 — 126,566 — FHLB stock, at cost 12,887 12,887 — 12,887 — Equity investments 5,828 5,828 — 5,828 — Loans, net of allowance for loan losses 4,026,989 3,793,430 — — 3,793,430 Loans held for sale 421 421 — 421 — Financial liabilities: Deposits $ 6,181,159 $ 6,126,861 $ — $ 6,126,861 $ — Other borrowings 74,721 74,721 — 74,721 — FHLB borrowings 243,531 243,512 — 243,512 — Subordinated notes, net of unamortized debt issuance costs 98,639 89,214 — 89,214 — Trust preferred subordinated debentures, net of unamortized debt issuance costs 60,264 57,598 — 57,598 — Estimated Fair Value December 31, 2021 Carrying Total Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 201,753 $ 201,753 $ 201,753 $ — $ — Investment securities: HTM, at carrying value 788 791 — 791 — Mortgage-backed securities: HTM, at carrying value 89,992 94,444 — 94,444 — FHLB stock, at cost 14,375 14,375 — 14,375 — Equity investments 5,921 5,921 — 5,921 — Loans, net of allowance for loan losses 3,609,889 3,748,116 — — 3,748,116 Loans held for sale 1,684 1,684 — 1,684 — Financial liabilities: Deposits $ 5,722,327 $ 5,721,694 $ — $ 5,721,694 $ — Other borrowings 23,219 23,219 — 23,219 — FHLB borrowings 344,038 346,604 — 346,604 — Subordinated notes, net of unamortized debt issuance costs 98,534 98,642 — 98,642 — Trust preferred subordinated debentures, net of unamortized debt issuance costs 60,260 48,480 — 48,480 —

Income Taxes Income Taxes (Tabl

Income Taxes Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	The income tax expense included in the accompanying consolidated statements of income consists of the following (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Current income tax expense $ 4,415 $ 3,387 $ 10,215 $ 9,002 Deferred income tax expense (benefit) (540) 1,590 103 3,612 Income tax expense $ 3,875 $ 4,977 $ 10,318 $ 12,614

Off-Balance-Sheet Arrangement_2

Off-Balance-Sheet Arrangements, Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Off-balance-sheet, Allowance for off-balance-sheet credit exposures	Allowance for off-balance-sheet credit exposures were as follows (in thousands): Three Months Ended Nine Months Ended 2022 2021 2022 2021 Balance at beginning of period $ 1,891 $ 3,773 $ 2,384 $ 6,386 Provision for (reversal of) off-balance-sheet credit exposures 200 (683) (293) (3,296) Balance at end of period $ 2,091 $ 3,090 $ 2,091 $ 3,090
Schedule of unused commitments	Financial instruments with off-balance-sheet risk were as follows (in thousands): September 30, 2022 December 31, 2021 Commitments to extend credit $ 1,223,284 $ 1,053,002 Standby letters of credit 14,719 12,708 Total $ 1,238,003 $ 1,065,710

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Basic and Diluted Earnings:
Net income	$ 26,951	$ 25,405	$ 24,996	$ 29,306	$ 21,317	$ 34,091	$ 77,352	$ 84,714
Basic weighted-average shares outstanding (in shares)	32,112			32,465			32,195	32,641
Add: Stock awards (in shares)	109			91			146	118
Diluted weighted-average shares outstanding (in shares)	32,221			32,556			32,341	32,759
Basic earnings per share:
Earnings per common share - basic (in dollars per share)	$ 0.84			$ 0.90			$ 2.40	$ 2.60
Diluted earnings per share:
Earnings per common share - diluted (in dollars per share)	$ 0.84			$ 0.90			$ 2.39	$ 2.59
Number of antidilutive options (in shares)	22			462			0	288

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income, Changes In (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax
Beginning balance, net of tax	$ 731,782	$ 894,400	$ 912,172	$ 875,297
Income tax (expense) benefit	10,993	5,560	63,902	6,674
Ending balance, net of tax	707,636	877,866	707,636	877,866
Unrealized Gains (Losses) on Securities
AOCI Attributable to Parent, Net of Tax
Beginning balance, net of tax	(137,792)	102,628	84,716	116,078
Other comprehensive (loss) income before reclassifications	(67,721)	(27,714)	(354,649)	(43,527)
Reclassification adjustments included in net income	1,495	(1,069)	6,768	(2,281)
Income tax (expense) benefit	13,908	6,045	73,055	9,620
Net current-period other comprehensive income (loss), net of tax	(52,318)	(22,738)	(274,826)	(36,188)
Ending balance, net of tax	(190,110)	79,890	(190,110)	79,890
Unrealized Gains (Losses) on Derivatives
AOCI Attributable to Parent, Net of Tax
Beginning balance, net of tax	21,857	(8,334)	(1,257)	(17,091)
Other comprehensive (loss) income before reclassifications	15,226	377	42,819	8,296
Reclassification adjustments included in net income	(1,572)	1,617	94	4,784
Income tax (expense) benefit	(2,868)	(418)	(9,013)	(2,747)
Net current-period other comprehensive income (loss), net of tax	10,786	1,576	33,900	10,333
Ending balance, net of tax	32,643	(6,758)	32,643	(6,758)
Retirement Plans
AOCI Attributable to Parent, Net of Tax
Beginning balance, net of tax	(23,400)	(29,407)	(23,754)	(29,907)
Other comprehensive (loss) income before reclassifications	0	0	0	0
Reclassification adjustments included in net income	224	316	671	948
Income tax (expense) benefit	(47)	(67)	(140)	(199)
Net current-period other comprehensive income (loss), net of tax	177	249	531	749
Ending balance, net of tax	(23,223)	(29,158)	(23,223)	(29,158)
Total
AOCI Attributable to Parent, Net of Tax
Beginning balance, net of tax	(139,335)	64,887	59,705	69,080
Other comprehensive (loss) income before reclassifications	(52,495)	(27,337)	(311,830)	(35,231)
Reclassification adjustments included in net income	147	864	7,533	3,451
Income tax (expense) benefit	10,993	5,560	63,902	6,674
Net current-period other comprehensive income (loss), net of tax	(41,355)	(20,913)	(240,395)	(25,106)
Ending balance, net of tax	$ (180,690)	$ 43,974	$ (180,690)	$ 43,974

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrealized gains and losses		$ 1,396	$ 312	$ 2,949	$ 1,118
Tax benefit (expense)		(3,875)	(4,977)	(10,318)	(12,614)
Realized net gain (loss) on sale of securities		(99)	1,381	(3,819)	3,399
Total reclassifications for the period, net of tax		(116)	(681)	(5,952)	(2,726)
Unrealized gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income		(1,495)	1,069	(6,768)	2,281
Realized net gain (loss) on interest rate swap derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income		1,572	(1,617)	(94)	(4,784)
Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income	[1]	(224)	(316)	(671)	(948)
Amortization of pension plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassified from accumulated other comprehensive income		(224)	(316)	(671)	(948)
Tax benefit		47	67	140	199
Total reclassifications for the period, net of tax		(177)	(249)	(531)	(749)
Unrealized gains and losses on securities transferred | Reclassification out of accumulated other comprehensive income | Unrealized gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrealized gains and losses	[2]	(1,396)	(312)	(2,949)	(1,118)
Tax benefit (expense)		293	66	619	235
Net of tax		(1,103)	(246)	(2,330)	(883)
Unrealized gains and losses on available for sale securities | Reclassification out of accumulated other comprehensive income | Unrealized gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit (expense)		21	(290)	802	(714)
Net of tax		(78)	1,091	(3,017)	2,685
Realized net gain (loss) on sale of securities	[3]	(99)	1,381	(3,819)	3,399
Interest rate swap derivatives | Reclassification out of accumulated other comprehensive income | Realized net gain (loss) on interest rate swap derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit (expense)		(330)	340	20	1,005
Net of tax		1,242	(1,277)	(74)	(3,779)
Realized net (loss) gain on interest rate swap derivatives	[4]	$ 1,572	$ (1,617)	$ (94)	$ (4,784)
[1]These AOCI components are included in the computation of net periodic pension cost (income) presented in “Note 8 – Employee Benefit Plans.”[2]Included in interest income on the consolidated statements of income.[3]Listed as net gain (loss) on sale of securities AFS on the consolidated statements of income.[4]Included in interest expense for FHLB borrowings and deposits on the consolidated statements of income.

Securities - Schedule of Debt S

Securities - Schedule of Debt Securities Components (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Available-for-sale [Abstract]
Amortized Cost		$ 1,592,891	$ 2,655,594
Gross unrealized gains		356	113,681
Gross unrealized losses		168,685	4,950
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,424,562	2,764,325
HELD TO MATURITY
Amortized cost		1,151,205	90,780
Gross unrealized gains		22	4,455
Gross unrealized losses		207,905	0
Estimated Fair Value		943,322	95,235
US Treasury Securities
Available-for-sale [Abstract]
Amortized Cost			58,084
Gross unrealized gains			843
Gross unrealized losses			50
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			58,877
State and political subdivisions
Available-for-sale [Abstract]
Amortized Cost		1,186,010	1,962,257
Gross unrealized gains		26	93,893
Gross unrealized losses		147,704	4,214
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,038,332	2,051,936
HELD TO MATURITY
Amortized cost		918,216	788
Gross unrealized gains		0	3
Gross unrealized losses		190,841	0
Estimated Fair Value		727,375	791
Corporate bonds and other
Available-for-sale [Abstract]
Amortized Cost		60,144	133,333
Gross unrealized gains		67	2,408
Gross unrealized losses		2,794	209
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		57,417	135,532
HELD TO MATURITY
Amortized cost		95,458
Gross unrealized gains		0
Gross unrealized losses		6,077
Estimated Fair Value		89,381
Residential
Available-for-sale [Abstract]
Amortized Cost	[1]	337,189	411,727
Gross unrealized gains	[1]	263	14,895
Gross unrealized losses	[1]	17,084	272
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[1]	320,368	426,350
HELD TO MATURITY
Amortized cost	[1]	94,539	38,644
Gross unrealized gains	[1]	22	2,103
Gross unrealized losses	[1]	8,383	0
Estimated Fair Value	[1]	86,178	40,747
Commercial
Available-for-sale [Abstract]
Amortized Cost	[1]	9,548	90,193
Gross unrealized gains	[1]	0	1,642
Gross unrealized losses	[1]	1,103	205
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[1]	8,445	91,630
HELD TO MATURITY
Amortized cost	[1]	42,992	51,348
Gross unrealized gains	[1]	0	2,349
Gross unrealized losses	[1]	2,604	0
Estimated Fair Value	[1]	$ 40,388	$ 53,697
[1]All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs.

Securities - Unrealized Loss on

Securities - Unrealized Loss on Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
AVAILABLE FOR SALE
Less than 12 Months, fair value	$ 1,393,355	$ 311,552
Less than 12 Months, unrealized loss	166,856	3,891
More than 12 Months, fair value	6,641	17,450
More than 12 Months, unrealized Loss	1,829	1,059
Total fair value	1,399,996	329,002
Total unrealized loss	168,685	4,950
HELD TO MATURITY
Less than 12 months, fair value	853,678
Less than 12 months, unrealized loss	177,678
More than 12 months, fair value	88,823
More than 12 months, unrealized loss	30,227
Total fair value	942,501
Total unrealized loss	207,905
US Treasury Securities
AVAILABLE FOR SALE
Less than 12 Months, fair value		9,947
Less than 12 Months, unrealized loss		50
More than 12 Months, fair value		0
More than 12 Months, unrealized Loss		0
Total fair value		9,947
Total unrealized loss		50
State and political subdivisions
AVAILABLE FOR SALE
Less than 12 Months, fair value	1,026,787	260,509
Less than 12 Months, unrealized loss	146,634	3,622
More than 12 Months, fair value	3,862	7,608
More than 12 Months, unrealized Loss	1,070	592
Total fair value	1,030,649	268,117
Total unrealized loss	147,704	4,214
HELD TO MATURITY
Less than 12 months, fair value	644,238
Less than 12 months, unrealized loss	161,326
More than 12 months, fair value	83,137
More than 12 months, unrealized loss	29,515
Total fair value	727,375
Total unrealized loss	190,841
Corporate bonds and other
AVAILABLE FOR SALE
Less than 12 Months, fair value	53,381	35,597
Less than 12 Months, unrealized loss	2,794	209
More than 12 Months, fair value	0	0
More than 12 Months, unrealized Loss	0	0
Total fair value	53,381	35,597
Total unrealized loss	2,794	209
HELD TO MATURITY
Less than 12 months, fair value	87,630
Less than 12 months, unrealized loss	5,939
More than 12 months, fair value	1,751
More than 12 months, unrealized loss	138
Total fair value	89,381
Total unrealized loss	6,077
Residential
AVAILABLE FOR SALE
Less than 12 Months, fair value	307,521	1,225
Less than 12 Months, unrealized loss	17,084	3
More than 12 Months, fair value	0	5,168
More than 12 Months, unrealized Loss	0	269
Total fair value	307,521	6,393
Total unrealized loss	17,084	272
HELD TO MATURITY
Less than 12 months, fair value	81,422
Less than 12 months, unrealized loss	7,809
More than 12 months, fair value	3,935
More than 12 months, unrealized loss	574
Total fair value	85,357
Total unrealized loss	8,383
Commercial
AVAILABLE FOR SALE
Less than 12 Months, fair value	5,666	4,274
Less than 12 Months, unrealized loss	344	7
More than 12 Months, fair value	2,779	4,674
More than 12 Months, unrealized Loss	759	198
Total fair value	8,445	8,948
Total unrealized loss	1,103	$ 205
HELD TO MATURITY
Less than 12 months, fair value	40,388
Less than 12 months, unrealized loss	2,604
More than 12 months, fair value	0
More than 12 months, unrealized loss	0
Total fair value	40,388
Total unrealized loss	$ 2,604

Securities - Interest Income on

Securities - Interest Income on Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investments, Debt Securities [Abstract]
US Treasury	$ 44	$ 182	$ 271	$ 388
State and political subdivisions	14,666	12,223	41,786	33,568
Corporate bonds and other	1,668	1,097	4,385	2,928
MBS	4,770	4,405	12,025	15,140
Total interest income on securities	$ 21,148	$ 17,907	$ 58,467	$ 52,024

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Investments in Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available for sale, Amortized Cost
Due in one year or less	$ 528
Due after one year through five years	21,668
Due after five years through ten years	96,779
Due after ten years	1,127,179
Total available-for-sale investment securities	1,246,154
MBS:	346,737
Amortized Cost	1,592,891	$ 2,655,594
Available for sale, Fair Value
Due in one year or less	529
Due after one year through five years	21,154
Due after five years through ten years	93,415
Due after ten years	980,651
Total available-for-sale investment securities	1,095,749
MBS:	328,813
Total	1,424,562	2,764,325
Held to maturity, Amortized Cost
Due in one year or less	125
Due after one year through five years	1,039
Due after five years through ten years	100,463
Due after ten years	912,047
Total held-to-maturity investment securities	1,013,674
Mortgage-backed securities	137,531
Amortized cost	1,151,205	90,780
Held to maturity, Fair Value
Due in one year or less	123
Due after one year through five years	1,016
Due after five years through ten years	94,140
Due after ten years	721,477
Total held-to-maturity investment securities	816,756
Mortgage-backed securities	126,566
Total	$ 943,322	$ 95,235

Securities - Unrealized and Rea

Securities - Unrealized and Realized Gain (Loss) Recognized in Net Income on Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investments, All Other Investments [Abstract]
Net gains (losses) recognized during the period on equity investments	$ (230)	$ (28)	$ (696)	$ (118)
Less: Net gains recognized during the period on equity investments sold during the period	0	0	0	0
Unrealized gains (losses) recognized during the reporting period on equity investments held at the reporting date	$ (230)	$ (28)	$ (696)	$ (118)

Securities - Narrative (Details

Securities - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0		$ 0		$ 0
Transferred Securities, Unrealized Loss, Before Tax	96,200,000		96,200,000		1,500,000
Securities transferred, Unrealized Loss, Net of Tax	76,000,000		76,000,000		1,200,000
Fair value of securities transferred from AFS to HTM			1,070,000,000		0
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Net gain (loss) on sale of securities AFS	(99,000)	$ 1,381,000	(3,819,000)	$ 3,399,000
Gross realized gains on AFS securities			584,000	3,500,000
Gross realized losses on AFS securities			4,400,000	71,000
Equity investments	11,052,000		11,052,000		11,841,000
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Sale of HTM portfolio			0	0
Interest receivable	32,914,000		32,914,000		39,145,000
Debt Securities, Held-to-maturity, Nonaccrual	0		0		0
FHLB stock with other-than-temporary impairment	0		0
Other-than-temporarily impaired equity investments	$ 0		$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	811		811
State and political subdivisions
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal)	$ 0	0	$ 0	0
Corporate bonds and other
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal)	0	$ 0	0	$ 0
Asset Pledged as Collateral
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Debt Securities	1,580,000,000		1,580,000,000		1,610,000,000
Financial Asset, Past Due
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Securities held to maturity (estimated fair value of $138,879)	0		0		0
Available-for-sale Securities
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Interest receivable	11,800,000		11,800,000		25,600,000
Held-to-maturity Securities
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]
Interest receivable	$ 6,300,000		$ 6,300,000		$ 244,000

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans	$ 4,063,495		$ 3,645,162
Less: Allowance for loan losses	36,506	$ 35,449	35,273	$ 38,022	$ 42,913	$ 49,006
Total loans	4,026,989		3,609,889
Construction Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	554,345		447,860
Less: Allowance for loan losses	3,535	3,399	3,787	4,983	8,018	6,490
1-4 Family Residential Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	646,692		651,140
Less: Allowance for loan losses	2,006	2,024	1,866	1,946	2,520	2,270
Commercial Real Estate Loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	1,901,921		1,598,172
Less: Allowance for loan losses	28,494	27,221	26,980	28,258	28,930	35,709
Commercial loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	433,538		418,998
Less: Allowance for loan losses	2,233	2,558	2,397	2,560	3,097	4,107
Municipal loans
Loans and Leases Receivable Disclosure [Abstract]
Loans	449,219		443,078
Less: Allowance for loan losses	44	46	47	46	47	46
Loans to individuals
Loans and Leases Receivable Disclosure [Abstract]
Loans	77,780		85,914
Less: Allowance for loan losses	$ 194	$ 201	$ 196	$ 229	$ 301	$ 384

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Loans by Credit Quality Indicator and Origination Year (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 1,066,307	$ 1,254,660
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,097,984	564,191
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	420,668	444,235
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	304,317	220,201
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	132,186	241,060
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	653,954	595,557
Financing Receivable, Excluding Accrued Interest, Revolving	388,079	325,258
Loans	4,063,495	3,645,162
Construction Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	128,904	179,521
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	200,661	82,862
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	40,301	38,788
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	9,645	5,716
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	1,963	2,126
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	7,042	6,255
Financing Receivable, Excluding Accrued Interest, Revolving	165,829	132,592
Loans	554,345	447,860
Construction Real Estate Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	127,074	179,521
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	200,310	82,862
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	40,301	38,788
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	9,256	5,666
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	1,918	2,126
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	6,813	6,080
Financing Receivable, Excluding Accrued Interest, Revolving	165,829	132,592
Loans	551,501	447,635
Construction Real Estate Loans | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Construction Real Estate Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,830	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	305	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	2,135	0
Construction Real Estate Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	389	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	45	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	229	175
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	663	175
Construction Real Estate Loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	46	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	50
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	46	50
1-4 Family Residential Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	91,727	141,115
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	127,248	130,166
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	113,272	81,662
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	68,205	47,566
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	39,125	34,531
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	204,883	213,774
Financing Receivable, Excluding Accrued Interest, Revolving	2,232	2,326
Loans	646,692	651,140
1-4 Family Residential Real Estate Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	91,723	141,058
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	127,248	129,681
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	112,796	81,607
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	68,045	47,566
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	37,349	34,236
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	202,116	209,470
Financing Receivable, Excluding Accrued Interest, Revolving	2,190	2,238
Loans	641,467	645,856
1-4 Family Residential Real Estate Loans | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	777
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	777
1-4 Family Residential Real Estate Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	82
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	80	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	1,414	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	1,494	82
1-4 Family Residential Real Estate Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	4	57
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	403
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	396	55
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	160	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	184	295
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,531	3,257
Financing Receivable, Excluding Accrued Interest, Revolving	42	88
Loans	3,317	4,155
1-4 Family Residential Real Estate Loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	178	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	236	270
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	414	270
Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	665,134	672,970
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	588,474	210,099
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	172,828	225,133
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	153,858	119,461
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	56,547	143,887
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	253,136	219,056
Financing Receivable, Excluding Accrued Interest, Revolving	11,944	7,566
Loans	1,901,921	1,598,172
Commercial Real Estate Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	664,538	648,002
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	579,040	207,370
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	170,699	209,923
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	138,748	114,788
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	56,168	143,350
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	241,718	209,368
Financing Receivable, Excluding Accrued Interest, Revolving	11,944	7,566
Loans	1,862,855	1,540,367
Commercial Real Estate Loans | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	21,669
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	9,434	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	2,163
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	3,074
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	374
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,771	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	11,205	27,280
Commercial Real Estate Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	2,062
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	1,844	2,217
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	333	119
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	116	163
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,898	1,877
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	4,191	6,438
Commercial Real Estate Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	596	3,299
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	667
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	285	10,830
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	14,699	1,480
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	263	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	7,620	7,691
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	23,463	23,967
Commercial Real Estate Loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	78	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	129	120
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	207	120
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	105,532	140,635
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	81,743	52,232
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	20,975	25,466
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	9,933	14,122
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	6,376	2,532
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,744	4,291
Financing Receivable, Excluding Accrued Interest, Revolving	205,235	179,720
Loans	433,538	418,998
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	105,247	140,628
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	76,210	51,866
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	20,852	24,688
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	9,369	13,204
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	5,792	2,516
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,680	4,062
Financing Receivable, Excluding Accrued Interest, Revolving	164,967	178,263
Loans	386,117	415,227
Commercial loans | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	217	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	6	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	280
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	247	22
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	27,452	0
Loans	27,922	302
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,183	57
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	34	78
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	363
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	307	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	157
Financing Receivable, Excluding Accrued Interest, Revolving	12,742	0
Loans	18,266	655
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	16	283
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	72	296
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	122	174
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	37	16
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	9	0
Financing Receivable, Excluding Accrued Interest, Revolving	74	1,457
Loans	330	2,226
Commercial loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	68	7
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	328	26
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	17	124
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	195	359
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	240	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	55	72
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	903	588
Municipal loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	49,215	80,167
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	75,567	64,803
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	58,288	61,348
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	56,151	29,168
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	26,141	56,274
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	183,857	151,318
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	449,219	443,078
Municipal loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	49,215	80,167
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	75,567	64,803
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	58,288	61,348
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	56,151	29,168
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	26,141	56,274
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	183,857	151,318
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	449,219	443,078
Municipal loans | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Municipal loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Municipal loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Municipal loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Loans to individuals
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	25,795	40,252
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	24,291	24,029
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	15,004	11,838
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	6,525	4,168
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	2,034	1,710
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,292	863
Financing Receivable, Excluding Accrued Interest, Revolving	2,839	3,054
Loans	77,780	85,914
Loans to individuals | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	25,795	40,252
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	24,290	24,028
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	15,004	11,813
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	6,515	4,121
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	1,994	1,684
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,285	849
Financing Receivable, Excluding Accrued Interest, Revolving	2,838	3,052
Loans	77,721	85,799
Loans to individuals | Pass Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	0
Loans to individuals | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	36
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	0	36
Loans to individuals | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	1	1
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	24
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	10	4
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	40	23
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	4	10
Financing Receivable, Excluding Accrued Interest, Revolving	1	2
Loans	56	64
Loans to individuals | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	1
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	7
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	3
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3	4
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Loans	$ 3	$ 15

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Aging of Past Due Loans by Class of Loan (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 4,063,495	$ 3,645,162
Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	4,057,254	3,636,828
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,072	6,507
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,173	956
Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	996	871
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	6,241	8,334
Construction Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	554,345	447,860
Construction Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	553,729	447,720
Construction Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	160	82
Construction Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	410	58
Construction Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	46	0
Construction Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	616	140
1-4 Family Residential Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	646,692	651,140
1-4 Family Residential Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	644,262	647,081
1-4 Family Residential Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,367	3,226
1-4 Family Residential Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	547	606
1-4 Family Residential Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	516	227
1-4 Family Residential Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,430	4,059
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Loans	1,901,921	1,598,172
Commercial Real Estate Loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	1,901,256	1,596,882
Commercial Real Estate Loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	243	1,191
Commercial Real Estate Loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	422	0
Commercial Real Estate Loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	99
Commercial Real Estate Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	665	1,290
Commercial loans
Financing Receivable, Past Due [Line Items]
Loans	433,538	418,998
Commercial loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	431,216	416,687
Commercial loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,094	1,523
Commercial loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	794	251
Commercial loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	434	537
Commercial loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,322	2,311
Municipal loans
Financing Receivable, Past Due [Line Items]
Loans	449,219	443,078
Municipal loans | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	449,219	442,908
Municipal loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	170
Municipal loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Municipal loans | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Municipal loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	170
Loans to individuals
Financing Receivable, Past Due [Line Items]
Loans	77,780	85,914
Loans to individuals | Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Loans	77,572	85,550
Loans to individuals | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	208	315
Loans to individuals | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	41
Loans to individuals | Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	8
Loans to individuals | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans	$ 208	$ 364

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Nonperforming Assets by Asset Class (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Nonperforming Assets [Line Items]
Restructured nonaccrual loans		$ 950	$ 1,100
Nonperforming Assets
Nonperforming Assets [Line Items]
Nonaccrual loans	[1]	3,039	2,536
Accruing loans past due more than 90 days		0	0
TDR loans		8,481	9,073
OREO		162	0
Repossessed assets		35	0
Total nonperforming assets		11,717	11,609
Nonperforming Assets | Construction Real Estate Loans
Nonperforming Assets [Line Items]
Nonaccrual loans		77	57
Nonperforming Assets | 1-4 Family Residential Real Estate Loans
Nonperforming Assets [Line Items]
Nonaccrual loans		1,183	969
Nonperforming Assets | Commercial Real Estate Loans
Nonperforming Assets [Line Items]
Nonaccrual loans		696	668
Nonperforming Assets | Commercial loans
Nonperforming Assets [Line Items]
Nonaccrual loans		1,071	815
Nonperforming Assets | Loans to individuals
Nonperforming Assets [Line Items]
Nonaccrual loans		$ 12	$ 27
[1]Includes $950,000 and $1.1 million of TDR loans as of September 30, 2022 and December 31, 2021, respectively.

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | contract		4	7	9
Total Modifications	$ 0	$ 672	$ 321	$ 907
1-4 Family Residential Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | contract		3	4	5
Total Modifications		$ 219	$ 307	$ 344
Commercial Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | contract		1		1
Total Modifications		$ 453		$ 453
Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | contract			1	3
Total Modifications			$ 5	$ 110
Loans to individuals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | contract			2
Total Modifications			$ 9
Extended Amortization Period
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0	0	0
Extended Amortization Period | 1-4 Family Residential Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0	0	0
Extended Amortization Period | Commercial Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0		0
Extended Amortization Period | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			0	0
Extended Amortization Period | Loans to individuals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			0
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0	0	16
Interest Rate Reduction | 1-4 Family Residential Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0	0	0
Interest Rate Reduction | Commercial Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		0		0
Interest Rate Reduction | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			0	16
Interest Rate Reduction | Loans to individuals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			0
Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		672	321	891
Combination | 1-4 Family Residential Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		219	307	344
Combination | Commercial Real Estate Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications		$ 453		453
Combination | Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			5	$ 94
Combination | Loans to individuals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Modifications			$ 9

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Allowance for Loan Losses Activity by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	$ 35,449	$ 42,913	$ 35,273	$ 49,006
Loans charged-off	(686)	(940)	(1,720)	(2,262)
Recoveries of loans charged-off	449	437	1,505	1,525
Net loans (charged-off) recovered	(237)	(503)	(215)	(737)
Provision for (reversal of) loan losses	1,294	(4,388)	1,448	(10,247)
Balance at end of period	36,506	38,022	36,506	38,022
Construction Real Estate Loans
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	3,399	8,018	3,787	6,490
Loans charged-off	0	0	0	0
Recoveries of loans charged-off	0	1	1	2
Net loans (charged-off) recovered	0	1	1	2
Provision for (reversal of) loan losses	136	(3,036)	(253)	(1,509)
Balance at end of period	3,535	4,983	3,535	4,983
1-4 Family Residential Real Estate Loans
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	2,024	2,520	1,866	2,270
Loans charged-off	(66)	(35)	(66)	(136)
Recoveries of loans charged-off	4	4	96	71
Net loans (charged-off) recovered	(62)	(31)	30	(65)
Provision for (reversal of) loan losses	44	(543)	110	(259)
Balance at end of period	2,006	1,946	2,006	1,946
Commercial Real Estate Loans
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	27,221	28,930	26,980	35,709
Loans charged-off	0	0	0	0
Recoveries of loans charged-off	0	12	81	13
Net loans (charged-off) recovered	0	12	81	13
Provision for (reversal of) loan losses	1,273	(684)	1,433	(7,464)
Balance at end of period	28,494	28,258	28,494	28,258
Commercial loans
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	2,558	3,097	2,397	4,107
Loans charged-off	(192)	(508)	(369)	(943)
Recoveries of loans charged-off	139	74	469	535
Net loans (charged-off) recovered	(53)	(434)	100	(408)
Provision for (reversal of) loan losses	(272)	(103)	(264)	(1,139)
Balance at end of period	2,233	2,560	2,233	2,560
Municipal loans
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	46	47	47	46
Loans charged-off	0	0	0	0
Recoveries of loans charged-off	0	0	0	0
Net loans (charged-off) recovered	0	0	0	0
Provision for (reversal of) loan losses	(2)	(1)	(3)	0
Balance at end of period	44	46	44	46
Loans to individuals
Allowances for Loan Losses [Roll Forward]
Balance at beginning of period	201	301	196	384
Loans charged-off	(428)	(397)	(1,285)	(1,183)
Recoveries of loans charged-off	306	346	858	904
Net loans (charged-off) recovered	(122)	(51)	(427)	(279)
Provision for (reversal of) loan losses	115	(21)	425	124
Balance at end of period	$ 194	$ 229	$ 194	$ 229

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	$ 4,063,495,000		$ 4,063,495,000		$ 3,645,162,000
Interest receivable	32,914,000		32,914,000		39,145,000
Reversal of interest income on nonaccrual loans	10,000	$ 5,000	33,000	$ 13,000
Nonaccrual loans, no allowance	1,000,000		1,000,000		1,200,000
Collateral-dependent loans	8,700,000		8,700,000		8,500,000
Commitments to lend additional funds on Troubled Debt Restructurings (TDR)	0	$ 0	0	$ 0
Mortgage Loans in Process of Foreclosure, Amount	171,000		171,000		21,000
Accrued interest receivable on our loan portfolio	14,800,000		14,800,000		13,300,000
Commercial Real Estate Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	1,901,921,000		1,901,921,000		1,598,172,000
Owner and nonowner-occupied real estate	1,570,000,000		1,570,000,000
Loans secured by multi-family properties	307,100,000		307,100,000
Loans secured by farmland	24,800,000		$ 24,800,000
General Loan Term			20 years
1-4 Family Residential Real Estate Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	646,692,000		$ 646,692,000		651,140,000
1-4 Family Residential Real Estate Loans | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
General Loan Term			15 years
1-4 Family Residential Real Estate Loans | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
General Loan Term			30 years
Paycheck Protection Program
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	306,000		$ 306,000		31,000,000
Commercial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	$ 433,538,000		$ 433,538,000		$ 418,998,000

Borrowing Arrangements (Details

Borrowing Arrangements (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Other borrowings		$ 74,721	$ 23,219
FHLB borrowings		243,531	344,038
Other borrowings:
Debt Instrument [Line Items]
Other borrowings		74,721	23,219
Average amount outstanding during the period	[1]	62,814	22,257
Maximum amount outstanding during the period	[2]	$ 248,592	$ 24,549
Weighted average interest rate during the period	[3]	1.70%	0.20%
Interest rate at end of the period	[4]	2.10%	0.20%
FHLB borrowings:
Debt Instrument [Line Items]
FHLB borrowings		$ 243,531	$ 344,038
Average amount outstanding during the period	[1]	117,724	665,384
Maximum amount outstanding during the period	[2]	$ 423,645	$ 723,584
Weighted average interest rate during the period	[3]	1.90%	1.10%
Interest rate at end of the period	[5]	3.10%	1.30%
[1]The average amount outstanding during the period was computed by dividing the total daily outstanding principal balances by the number of days in the period.[2]The maximum amount outstanding at any month-end during the period.[3]The weighted average interest rate during the period was computed by dividing the actual interest expense (annualized for interim periods) by the average amount outstanding during the period. The weighted average interest rate on the FHLB borrowings includes the effect of interest rate swaps.[4]Stated rate.[5]As of December 31, 2021, the interest rate on the FHLB borrowings includes the effect of interest rate swaps.

Borrowings Maturities Table (De

Borrowings Maturities Table (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
Less than 1 Year	$ 312,723
1-2 Years	3,433
2-3 Years	764
3-4 Years	582
4-5 Years	401
Thereafter	349
Total	318,252
Other borrowings:
Debt Instrument [Line Items]
Less than 1 Year	72,021
1-2 Years	2,700
2-3 Years	0
3-4 Years	0
4-5 Years	0
Thereafter	0
Total	74,721
FHLB borrowings:
Debt Instrument [Line Items]
Less than 1 Year	240,702
1-2 Years	733
2-3 Years	764
3-4 Years	582
4-5 Years	401
Thereafter	349
Total	$ 243,531

Borrowing Arrangements Narrativ

Borrowing Arrangements Narrative (Details)	9 Months Ended
	Sep. 30, 2022 USD ($) oustanding_letters_of_credit credit_line	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Number of credit lines maintained by the Company | credit_line	3
Federal funds purchased	$ 0	$ 0
Letters of Credit, Federal Home Loan Bank, as collateral	$ 0
Maturity of repurchase agreements (less than)	1 year 4 months 24 days
Securities sold under repurchase agreements	$ 40,700,000	23,200,000
Federal Home Loan Bank borrowings, additional funding available	1,620,000,000
Frost Bank
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	40,000,000
Line of credit, capacity available for issuance of letters of credit	$ 5,000,000
Number of outstanding letters of credit | oustanding_letters_of_credit	1
Letters of Credit Outstanding, Amount	$ 155,000
TIB - The Independent Bankers Bank
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	15,000,000
Comerica Bank
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	7,500,000
Federal Reserve Discount Window
Line of Credit Facility [Line Items]
Additional funding available	$ 505,800,000
Minimum
Line of Credit Facility [Line Items]
Federal Home Loan Bank borrowings interest rates	2.73%
Federal Home Loan Bank borrowings maturities	6 days
Maximum
Line of Credit Facility [Line Items]
Federal Home Loan Bank borrowings interest rates	4.799%
Federal Home Loan Bank borrowings maturities	5 years 9 months 18 days
Federal Reserve Discount Window
Line of Credit Facility [Line Items]
Other borrowings	$ 34,000,000	$ 0

Long-term Debt Other Long-term

Long-term Debt Other Long-term Debt (Details) - USD ($) $ in Thousands

9 Months Ended

Sep. 30, 2022

Dec. 31, 2021

Nov. 06, 2020

Oct. 10, 2007

Aug. 10, 2007

Aug. 08, 2007

May 20, 2005

[4]

Sep. 04, 2003

Debt Instruments [Abstract]

Subordinated notes, net of unamortized debt issuance costs:

[1]

$ 98,639

$ 98,534

Trust preferred subordinated debentures

[2]

60,264

60,260

Total long-term debt

158,903

158,794

Southside Statutory Trust III, net of unamortized debt issuance costs

Debt Instruments [Abstract]

Trust preferred subordinated debentures

20,572

[2],[3]

20,568

[2],[3]

$ 20,619

Unamortized Debt Issuance Expense

47

51

Southside Statutory Trust IV

Debt Instruments [Abstract]

Trust preferred subordinated debentures

23,196

[2]

23,196

[2]

$ 23,196

Southside Statutory Trust V

Debt Instruments [Abstract]

Trust preferred subordinated debentures

12,887

[2]

12,887

[2]

$ 12,887

Magnolia Trust Company I

Debt Instruments [Abstract]

Trust preferred subordinated debentures

3,609

[2]

3,609

[2]

$ 3,600

$ 3,609

3.875% Subordinated Notes

Debt Instruments [Abstract]

Subordinated notes, net of unamortized debt issuance costs:

[1],[5]

98,639

98,534

Unamortized Debt Issuance Expense

$ 1,400

$ 1,500

Stated interest rate

3.875%

3.875%

Minimum

Debt Instruments [Abstract]

Subordinated notes, remaining maturity, greater than

1 year

[1]This debt consists of subordinated notes with a remaining maturity greater than one year that qualify under the risk-based capital guidelines as Tier 2 capital, subject to certain limitations.[2]This debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.[3]The unamortized debt issuance costs reflected in the carrying amount of the Southside Statutory Trust III junior subordinated debentures totaled $47,000 at September 30, 2022 and $51,000 at December 31, 2021.[4]On October 10, 2007, as part of an acquisition we assumed $3.6 million of floating rate junior subordinated debentures issued in 2005 to Magnolia Trust Company I.[5]The unamortized discount and debt issuance costs reflected in the carrying amount of the subordinated notes totaled approximately $1.4 million at September 30, 2022 and $1.5 million at December 31, 2021.

Long-term Debt LT Debt Interest

Long-term Debt LT Debt Interest Rates (Details) - USD ($) $ in Thousands

Nov. 14, 2025

Aug. 10, 2007

Aug. 08, 2007

May 20, 2005

Sep. 04, 2003

Sep. 30, 2022

Dec. 31, 2021

Nov. 06, 2020

Oct. 10, 2007

Debt Instrument [Line Items]

Other long-term debt

[1]

$ 60,264

$ 60,260

Southside Statutory Trust III

Debt Instrument [Line Items]

Other long-term debt

$ 20,619

20,572

[1],[2]

20,568

[1],[2]

Southside Statutory Trust III | Three-Month London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis on variable rate

2.94%

Southside Statutory Trust IV

Debt Instrument [Line Items]

Other long-term debt

$ 23,196

23,196

[1]

23,196

[1]

Southside Statutory Trust IV | Three-Month London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis on variable rate

1.30%

Southside Statutory Trust V

Debt Instrument [Line Items]

Other long-term debt

$ 12,887

12,887

[1]

12,887

[1]

Southside Statutory Trust V | Three-Month London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis on variable rate

2.25%

Magnolia Trust Company I

Debt Instrument [Line Items]

Other long-term debt

$ 3,609

[3]

$ 3,609

[1]

$ 3,609

[1]

$ 3,600

Magnolia Trust Company I | Three-Month London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Basis on variable rate

1.80%

3.875% Subordinated Notes

Debt Instrument [Line Items]

Debt face amount

$ 100,000

Stated interest rate

3.875%

3.875%

Forecast | 3.875% Subordinated Notes | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate

Debt Instrument [Line Items]

Basis on variable rate

3.66%

[1]This debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.[2]The unamortized debt issuance costs reflected in the carrying amount of the Southside Statutory Trust III junior subordinated debentures totaled $47,000 at September 30, 2022 and $51,000 at December 31, 2021.[3]On October 10, 2007, as part of an acquisition we assumed $3.6 million of floating rate junior subordinated debentures issued in 2005 to Magnolia Trust Company I.

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 685	$ 642	$ 2,056	$ 1,927
Expected return on assets	(1,461)	(1,355)	(4,384)	(4,065)
Net loss amortization	160	251	480	752
Net periodic benefit cost (income)	(616)	(462)	(1,848)	(1,386)
Retirement Plan Acquired
Defined Benefit Plan Disclosure [Line Items]
Interest cost	25	23	76	69
Expected return on assets	(58)	(53)	(174)	(158)
Net loss amortization	0	1	0	4
Net periodic benefit cost (income)	(33)	(29)	(98)	(85)
Restoration Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	144	130	433	390
Expected return on assets	0	0	0	0
Net loss amortization	64	64	191	192
Net periodic benefit cost (income)	$ 208	$ 194	$ 624	$ 582

Employee Benefit Plans Narrativ

Employee Benefit Plans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Noncash adjustment to employee benefit plan liabilities, consisting of changes in net loss			$ 671	$ 948
Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.125%	6.50%
Retirement Plan Acquired
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.125%	6.50%

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedging Activities - Schedule Of Derivative Instruments (Details) - USD ($)		Sep. 30, 2022	Dec. 31, 2021
Asset Derivative
Gross derivatives		$ 88,080,000	$ 18,231,000
Offsetting derivative assets		(18,000)	(4,819,000)
Cash collateral received/posted		(81,030,000)	0
Net derivatives included in the consolidated balance sheets	[1]	7,032,000	13,412,000
Liability Derivative
Gross derivatives		22,822,000	19,823,000
Offsetting derivative liabilities		(18,000)	(4,819,000)
Cash collateral received/posted		0	(12,810,000)
Net derivatives included in the consolidated balance sheets	[1]	22,804,000	2,194,000
Cash Flow Hedging | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		575,000,000
Financial Institution Counterparties
Derivatives, Fair Value [Line Items]
Credit exposure related to interest rate swaps		7,000,000	0
Financial Institution Counterparties | Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[2]	575,000,000	605,000,000
Asset Derivative
Gross derivatives		41,320,000	4,274,000
Liability Derivative
Gross derivatives		0	5,866,000
Financial Institution Counterparties | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[2]	742,675,000	0
Asset Derivative
Gross derivatives		23,956,000	0
Liability Derivative
Gross derivatives		18,000	0
Financial Institution Counterparties | Not Designated as Hedging Instrument | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[2]	229,199,000	214,379,000
Asset Derivative
Gross derivatives		22,804,000	545,000
Liability Derivative
Gross derivatives		0	13,412,000
Customer Counterparties
Derivatives, Fair Value [Line Items]
Credit exposure related to interest rate swaps		0	13,400,000
Customer Counterparties | Not Designated as Hedging Instrument | Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	[2]	229,199,000	214,379,000
Asset Derivative
Gross derivatives		0	13,412,000
Liability Derivative
Gross derivatives		$ 22,804,000	$ 545,000
[1]Net derivative assets are included in other assets and net derivative liabilities are included in other liabilities on the consolidated balance sheets. Included in the fair value of net derivative assets and net derivative liabilities are credit valuation adjustments reflecting counterparty credit risk and our credit risk. We had $7.0 million credit exposure related to interest rate swaps with financial institutions and none related to interest rate swaps with customers at September 30, 2022. We had no credit exposure related to interest rate swaps with financial institutions and $13.4 million related to interest rate swaps with customers at December 31, 2021. The credit risk associated with customer transactions is partially mitigated as these are generally secured by the non-cash collateral securing the underlying transaction being hedged.[2]Notional amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets.

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedging Activities - Weighted Average Remaining Maturity, Lives, and Rates of Interest Rate Swaps (Details) - Interest Rate Swap - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		$ 575,000,000
Financial Institution Counterparties | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	[1]	$ 229,199,000	$ 214,379,000
Remaining Maturity		9 years 1 month 6 days	10 years 3 months 18 days
Weighted Average Receive Rate		3.37%	0.47%
Weighted Average Pay Rate		2.68%	2.42%
Financial Institution Counterparties | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	[1]	$ 575,000,000	$ 605,000,000
Remaining Maturity		2 years 7 months 6 days	3 years 2 months 12 days
Weighted Average Receive Rate		2.94%	0.13%
Weighted Average Pay Rate		1.13%	1.10%
Financial Institution Counterparties | Fair Value Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	[1]	$ 742,675,000	$ 0
Remaining Maturity		6 years 6 months
Weighted Average Receive Rate		2.58%	0%
Weighted Average Pay Rate		3.21%	0%
Customer Counterparties | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	[1]	$ 229,199,000	$ 214,379,000
Remaining Maturity		9 years 1 month 6 days	10 years 3 months 18 days
Weighted Average Receive Rate		2.68%	2.42%
Weighted Average Pay Rate		3.37%	0.47%
[1]Notional amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets.

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedging Activities - Narrative (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Cash collateral held by counterparties subject to master netting agreements		$ 12,800,000
Cash collateral received from counterparties under master netting agreements	$ 81,030,000	0
Securities AFS , at estimated fair value	1,424,562,000	$ 2,764,325,000
Fair Value Hedging
Derivative [Line Items]
Securities AFS , at estimated fair value	708,900,000
Interest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Derivative	$ 575,000,000

Fair Value Measurement - Recurr

Fair Value Measurement - Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		$ 1,424,562	$ 2,764,325
Derivative assets	[1]	7,032	13,412
Derivative liabilities	[1]	22,804	2,194
US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			58,877
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,038,332	2,051,936
Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		57,417	135,532
Residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[2]	320,368	426,350
Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[2]	8,445	91,630
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments		5,224	5,920
Total asset fair value measurements		1,517,866	2,788,476
Total liability fair value measurements		22,822	19,823
Fair Value, Recurring | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			58,877
Fair Value, Recurring | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,038,332	2,051,936
Fair Value, Recurring | Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		57,417	135,532
Fair Value, Recurring | Residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	320,368	426,350
Fair Value, Recurring | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	8,445	91,630
Fair Value, Recurring | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		88,080	18,231
Derivative liabilities		22,822	19,823
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments		5,224	5,920
Total asset fair value measurements		5,224	64,797
Total liability fair value measurements		0	0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			58,877
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		0	0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		0	0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	0	0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	0	0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments		0	0
Total asset fair value measurements		1,512,642	2,723,679
Total liability fair value measurements		22,822	19,823
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		1,038,332	2,051,936
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		57,417	135,532
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	320,368	426,350
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	8,445	91,630
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		88,080	18,231
Derivative liabilities		22,822	19,823
Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments		0	0
Total asset fair value measurements		0	0
Total liability fair value measurements		0	0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | US Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)			0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		0	0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Corporate bonds and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)		0	0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	0	0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities AFS, at estimated fair value (amortized cost of $1,592,891 and $2,655,594, respectively)	[3]	0	0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Derivative liabilities		0	0
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets		197
Total asset fair value measurements		8,421	8,458
Fair Value, Nonrecurring | Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	[4]	8,224	8,458
Fair Value, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets		0
Total asset fair value measurements		0	0
Fair Value, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	[4]	0	0
Fair Value, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets		0
Total asset fair value measurements		0	0
Fair Value, Nonrecurring | Significant Other Observable Inputs (Level 2) | Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	[4]	0	0
Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets		197
Total asset fair value measurements		8,421	8,458
Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Collateral-dependent loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent loans	[4]	$ 8,224	$ 8,458
[1]Net derivative assets are included in other assets and net derivative liabilities are included in other liabilities on the consolidated balance sheets. Included in the fair value of net derivative assets and net derivative liabilities are credit valuation adjustments reflecting counterparty credit risk and our credit risk. We had $7.0 million credit exposure related to interest rate swaps with financial institutions and none related to interest rate swaps with customers at September 30, 2022. We had no credit exposure related to interest rate swaps with financial institutions and $13.4 million related to interest rate swaps with customers at December 31, 2021. The credit risk associated with customer transactions is partially mitigated as these are generally secured by the non-cash collateral securing the underlying transaction being hedged.[2]All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs.[3]All MBS are issued and/or guaranteed by U.S. government agencies or U.S. GSEs.[4]Consists of individually evaluated loans. Loans for which the fair value of the collateral and commercial real estate fair value of the properties is less than cost basis are presented net of allowance. Losses on these loans represent charge-offs which are netted against the allowance for loan losses.

Fair Value Measurement - Balanc

Fair Value Measurement - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Carrying Amount
Financial assets:
Cash and cash equivalents	$ 195,127	$ 201,753
Investment securities:
HTM, at carrying value	1,013,674	788
Mortgage-backed securities:
HTM, at carrying value	137,531	89,992
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	4,026,989	3,609,889
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,181,159	5,722,327
Other borrowings	74,721	23,219
FHLB borrowings	243,531	344,038
Subordinated notes, net of unamortized debt issuance costs	98,639	98,534
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,264	60,260
Estimated Fair Value
Financial assets:
Cash and cash equivalents	195,127	201,753
Investment securities:
HTM, at carrying value	816,756	791
Mortgage-backed securities:
HTM, at carrying value	126,566	94,444
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	3,793,430	3,748,116
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,126,861	5,721,694
Other borrowings	74,721	23,219
FHLB borrowings	243,512	346,604
Subordinated notes, net of unamortized debt issuance costs	89,214	98,642
Trust preferred subordinated debentures, net of unamortized debt issuance costs	57,598	48,480
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	195,127	201,753
Investment securities:
HTM, at carrying value	0	0
Mortgage-backed securities:
HTM, at carrying value	0	0
FHLB stock, at cost	0	0
Equity investments	0	0
Loans, net of allowance for loan losses	0	0
Loans held for sale	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
FHLB borrowings	0	0
Subordinated notes, net of unamortized debt issuance costs	0	0
Trust preferred subordinated debentures, net of unamortized debt issuance costs	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0
Investment securities:
HTM, at carrying value	816,756	791
Mortgage-backed securities:
HTM, at carrying value	126,566	94,444
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	0	0
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,126,861	5,721,694
Other borrowings	74,721	23,219
FHLB borrowings	243,512	346,604
Subordinated notes, net of unamortized debt issuance costs	89,214	98,642
Trust preferred subordinated debentures, net of unamortized debt issuance costs	57,598	48,480
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0
Investment securities:
HTM, at carrying value	0	0
Mortgage-backed securities:
HTM, at carrying value	0	0
FHLB stock, at cost	0	0
Equity investments	0	0
Loans, net of allowance for loan losses	3,793,430	3,748,116
Loans held for sale	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
FHLB borrowings	0	0
Subordinated notes, net of unamortized debt issuance costs	0	0
Trust preferred subordinated debentures, net of unamortized debt issuance costs	$ 0	$ 0

Fair Value Measurement Narrativ

Fair Value Measurement Narrative (Details)	9 Months Ended
	Sep. 30, 2022 source
Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of third party sources used to validate prices, in some cases	2
Derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of third party sources used to validate prices, in some cases	2

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Current income tax expense	$ 4,415	$ 3,387	$ 10,215	$ 9,002
Deferred income tax expense (benefit)	(540)	1,590	103	3,612
Income tax expense	$ 3,875	$ 4,977	$ 10,318	$ 12,614

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Deferred tax assets, net	$ 46,000,000		$ 46,000,000
Deferred tax liability, net					$ 17,800,000
Deferred tax assets, valuation allowance	0		0		$ 0
Income tax expense	$ 3,875,000	$ 4,977,000	$ 10,318,000	$ 12,614,000
Effective income tax rate, percent	12.60%	14.50%	11.80%	13%

Off-Balance-Sheet Arrangement_3

Off-Balance-Sheet Arrangements, Allowance for off-balance-sheet credit exposures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 1,891	$ 3,773	$ 2,384	$ 6,386
Provision for (reversal of) off-balance-sheet credit exposures	200	(683)	(293)	(3,296)
Balance at end of period	$ 2,091	$ 3,090	$ 2,091	$ 3,090

Off-Balance-Sheet Arrangement_4

Off-Balance-Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk, at fair value	$ 1,238,003	$ 1,065,710
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk, at fair value	1,223,284	1,053,002
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk, at fair value	$ 14,719	$ 12,708

Off-Balance-Sheet Arrangement_5

Off-Balance-Sheet Arrangements, Commitments and Contingencies Narrative (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2021 USD ($) contract	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities		$ 1,500,000	$ 240,000	$ 1,500,000	$ 1,300,000
Lessee, Operating Lease, Number of Contracts | contract	1
Operating lease ROU assets		15,610,000		15,610,000		$ 15,073,000
Unsettled trades to purchase securities		0	$ (4,433,000)	0	$ (4,433,000)	18,995,000
Unsettled Trades to Sell Securities		0		0		0
Unsettled Issuances of Brokered CDs		$ 28,481,000		$ 28,481,000		$ 0
Operating lease
Lessee, Lease, Description [Line Items]
Operating lease ROU assets	$ 1,100,000

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent event - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Oct. 27, 2022	Oct. 04, 2022
Subsequent Event [Line Items]
Shares purchased (in shares)	21,935
Stock purchased, average price (in dollars per share)	$ 33.37
State and political subdivisions
Subsequent Event [Line Items]
Fair value of AFS securities transferred to HTM		$ 118.9
Corporate Bond Securities
Subsequent Event [Line Items]
Fair value of AFS securities transferred to HTM		$ 56.9