Trustmark (TRMK) 10-Q 5 Nov 24 2024 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Cover [Abstract]
Entity Registrant Name	Trustmark Corp
Entity Central Index Key	0000036146
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		61,158,026
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2024
Trading Symbol	TRMK
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, no par value
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity File Number	000-03683
Entity Incorporation, State or Country Code	MS
Entity Tax Identification Number	64-0471500
Entity Address, Address Line One	248 East Capitol Street
Entity Address, City or Town	Jackson
Entity Address, State or Province	MS
Entity Address, Postal Zip Code	39201
City Area Code	601
Local Phone Number	208-5111
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 805,436	$ 975,343
Federal funds sold and securities purchased under reverse repurchase agreements	10,000	0
Securities available for sale, at fair value (amortized cost: $1,691,555 - 2024 $1,959,007-2023; allowance for credit losses (ACL): $0)	1,725,795	1,762,878
Securities held to maturity, net of ACL of $0 (fair value: $1,316,167 - 2024; $1,355,504-2023)	1,358,358	1,426,279
Loans held for sale (LHFS)	216,454	184,812
Loans held for investment (LHFI)	13,100,111	12,950,524
Less ACL, LHFI	157,929	139,367
Net LHFI	12,942,182	12,811,157
Premises and equipment, net	236,151	232,229
Mortgage servicing rights (MSR)	125,853	131,870
Goodwill	334,605	334,605
Identifiable intangible assets, net	153	236
Other real estate, net	3,920	6,867
Operating lease right-of-use assets	36,034	35,711
Other assets	685,431	752,568
Assets of discontinued operations	0	67,634
Total Assets	18,480,372	18,722,189
Deposits:
Noninterest-bearing	3,142,792	3,197,620
Interest-bearing	12,098,143	12,372,143
Total deposits	15,240,935	15,569,763
Federal funds purchased and securities sold under repurchase agreements	365,643	405,745
Other borrowings	443,458	483,230
Subordinated notes	123,647	123,482
Junior subordinated debt securities	61,856	61,856
ACL on off-balance sheet credit exposures	28,890	34,057
Operating lease liabilities	39,689	39,097
Other liabilities	196,158	331,085
Liabilities of discontinued operations	0	12,027
Total Liabilities	16,500,276	17,060,342
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 61,206,606 shares - 2024; 61,071,173 shares - 2023	12,753	12,725
Capital surplus	163,156	159,688
Retained earnings	1,833,232	1,709,157
Accumulated other comprehensive income (loss), net of tax	(29,045)	(219,723)
Total Shareholders' Equity	1,980,096	1,661,847
Total Liabilities and Shareholders' Equity	$ 18,480,372	$ 18,722,189

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Assets
Securities available-for-sale, amortized cost	$ 1,691,555,000	$ 1,959,007,000
Securities available-for-sale, allowance for credit Losses (ACL)	0	0
Securities held to maturity, net of ACL	0	0
Securities held to maturity, fair value	$ 1,316,167,000	$ 1,355,504,000
Shareholders' Equity
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	61,206,606	61,071,173
Common stock, outstanding (in shares)	61,206,606	61,071,173

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest Income
Interest and fees on LHFS & LHFI		$ 217,128	$ 203,236	$ 636,315	$ 568,318
Interest on securities:
Taxable		26,162	16,624	59,725	50,164
Tax exempt		0	46	4	173
Interest on federal funds sold and securities purchased under reverse repurchase agreements		9	3	12	78
Other interest income		8,293	8,613	24,527	27,217
Total Interest Income		251,592	228,522	720,583	645,950
Interest Expense
Interest on deposits		86,043	69,797	253,440	165,104
Interest on federal funds purchased and securities sold under repurchase agreements		4,864	5,375	16,118	15,072
Other interest expense		5,971	14,713	22,452	49,638
Total Interest Expense		96,878	89,885	292,010	229,814
Net Interest Income		154,714	138,637	428,573	416,136
PCL, off-balance sheet credit exposures		(1,375)	104	(5,167)	(1,893)
Net Interest Income After PCL		148,166	130,211	394,780	398,252
Noninterest Income (Loss)
Service charges on deposit accounts		11,272	11,074	33,154	32,105
Bank card and other fees		7,931	8,217	24,584	24,937
Mortgage banking, net		6,119	6,458	19,238	20,697
Wealth management		9,288	8,773	27,932	26,435
Other, net		2,952	2,399	13,515	7,654
Security gains (losses), net		0	0	(182,792)	0
Total Noninterest Income (Loss)		37,562	36,921	(64,369)	111,828
Noninterest Expense
Salaries and employee benefits		66,691	67,374	197,016	198,944
Services and fees		25,724	27,472	74,898	80,327
Net occupancy - premises		7,398	7,151	21,933	21,363
Equipment expense		6,141	6,755	18,707	19,387
Litigation settlement expense		0	6,500	0	6,500
Other expense		17,316	15,039	48,706	42,980
Total Noninterest Expense		123,270	130,291	361,260	369,501
Income (Loss) From Continuing Operations Before Income Taxes		62,458	36,841	(30,849)	140,579
Income taxes from continuing operations		11,128	6,288	(19,747)	21,177
Income (Loss) From Continuing Operations		51,330	30,553	(11,102)	119,402
Income from discontinued operations before income taxes		0	4,649	237,152	13,337
Income taxes from discontinued operations		0	1,173	59,353	3,373
Income From Discontinued Operations		0	3,476	177,799	9,964
Net Income		$ 51,330	$ 34,029	$ 166,697	$ 129,366
Earnings (Loss) Per Share (EPS)
Basic EPS from continuing operations		$ 0.84	$ 0.5	$ (0.18)	$ 1.96
Basic EPS from discontinued operations		0	0.06	2.91	0.16
Basic EPS	[1]	0.84	0.56	2.72	2.12
Diluted EPS from continuing operations		0.84	0.5	(0.18)	1.95
Diluted EPS from discontinued operations		0	0.06	2.9	0.16
Diluted EPS	[1]	$ 0.84	$ 0.56	$ 2.72	$ 2.11
Loans Held for Investment [Member]
Interest Expense
PCL, LHFI		$ 7,923	$ 8,322	$ 30,327	$ 19,777
1-4 Family Mortgage Loans [Member]
Interest Expense
PCL, LHFI		$ 0	$ 0	$ 8,633	$ 0
[1] Due to rounding, earnings (loss) per share from continuing operations and discontinued operations may not sum to earnings per share from net income.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 51,330	$ 34,029	$ 166,697	$ 129,366
Net unrealized gains (losses) on available for sale securities and transferred securities:
Net unrealized holding gains (losses) arising during the period	41,919	(20,223)	35,684	(11,816)
Reclassification adjustment for net (gains) losses realized in net income	0	0	137,094	0
Change in net unrealized holding loss on securities transferred to held to maturity	2,766	3,000	8,265	8,849
Reclassification adjustments for changes realized in net income:
Net change in prior service costs	21	21	62	62
Recognized net loss due to lump sum settlement	0	0	(10)	19
Change in net actuarial loss	63	52	198	162
Derivatives:
Change in the accumulated gain (loss) on effective cash flow hedge derivatives	14,120	(8,504)	(1,505)	(18,427)
Reclassification adjustment for (gain) loss realized in net income	3,623	3,470	10,890	8,666
Other comprehensive income (loss), net of tax	62,512	(22,184)	190,678	(12,485)
Comprehensive income (loss)	$ 113,842	$ 11,845	$ 357,375	$ 116,881

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2022	$ 1,492,268	$ 12,705	$ 154,645	$ 1,600,321	$ (275,403)
Balance (in shares) at Dec. 31, 2022		60,977,686
Net Income (Loss)	50,300			50,300
Other comprehensive income (loss), net of tax	33,022				33,022
Common stock dividends paid ($0.23 per share)	(14,158)			(14,158)
Shares withheld to pay taxes, long-term incentive plan	(1,048)	$ 15	(1,063)
Shares withheld to pay taxes, long-term incentive plan (in shares)		70,830
Compensation expense, long-term incentive plan	1,715		1,715
Balance at Mar. 31, 2023	1,562,099	$ 12,720	155,297	1,636,463	(242,381)
Balance (in shares) at Mar. 31, 2023		61,048,516
Balance at Dec. 31, 2022	1,492,268	$ 12,705	154,645	1,600,321	(275,403)
Balance (in shares) at Dec. 31, 2022		60,977,686
Net Income (Loss)	129,366
Other comprehensive income (loss), net of tax	(12,485)
Balance at Sep. 30, 2023	1,570,351	$ 12,724	158,316	1,687,199	(287,888)
Balance (in shares) at Sep. 30, 2023		61,070,095
Balance at Mar. 31, 2023	1,562,099	$ 12,720	155,297	1,636,463	(242,381)
Balance (in shares) at Mar. 31, 2023		61,048,516
Net Income (Loss)	45,037			45,037
Other comprehensive income (loss), net of tax	(23,323)				(23,323)
Common stock dividends paid ($0.23 per share)	(14,161)			(14,161)
Shares withheld to pay taxes, long-term incentive plan	(22)	$ 4	(26)
Shares withheld to pay taxes, long-term incentive plan (in shares)		20,520
Compensation expense, long-term incentive plan	1,563		1,563
Balance at Jun. 30, 2023	1,571,193	$ 12,724	156,834	1,667,339	(265,704)
Balance (in shares) at Jun. 30, 2023		61,069,036
Net Income (Loss)	34,029			34,029
Other comprehensive income (loss), net of tax	(22,184)				(22,184)
Common stock dividends paid ($0.23 per share)	(14,169)			(14,169)
Shares withheld to pay taxes, long-term incentive plan	(12)		(12)
Shares withheld to pay taxes, long-term incentive plan (in shares)		1,059
Compensation expense, long-term incentive plan	1,494		1,494
Balance at Sep. 30, 2023	1,570,351	$ 12,724	158,316	1,687,199	(287,888)
Balance (in shares) at Sep. 30, 2023		61,070,095
Balance at Dec. 31, 2023	$ 1,661,847	$ 12,725	159,688	1,709,157	(219,723)
Balance (in shares) at Dec. 31, 2023	61,071,173	61,071,173
Net Income (Loss)	$ 41,535			41,535
Other comprehensive income (loss), net of tax	(7,431)				(7,431)
Common stock dividends paid ($0.23 per share)	(14,207)			(14,207)
Shares withheld to pay taxes, long-term incentive plan	(1,383)	$ 22	(1,405)
Shares withheld to pay taxes, long-term incentive plan (in shares)		107,193
Compensation expense, long-term incentive plan	2,238		2,238
Balance at Mar. 31, 2024	1,682,599	$ 12,747	160,521	1,736,485	(227,154)
Balance (in shares) at Mar. 31, 2024		61,178,366
Balance at Dec. 31, 2023	$ 1,661,847	$ 12,725	159,688	1,709,157	(219,723)
Balance (in shares) at Dec. 31, 2023	61,071,173	61,071,173
Net Income (Loss)	$ 166,697
Other comprehensive income (loss), net of tax	190,678
Balance at Sep. 30, 2024	$ 1,980,096	$ 12,753	163,156	1,833,232	(29,045)
Balance (in shares) at Sep. 30, 2024	61,206,606	61,206,606
Balance at Mar. 31, 2024	$ 1,682,599	$ 12,747	160,521	1,736,485	(227,154)
Balance (in shares) at Mar. 31, 2024		61,178,366
Net Income (Loss)	73,832			73,832
Other comprehensive income (loss), net of tax	135,597				135,597
Common stock dividends paid ($0.23 per share)	(14,206)			(14,206)
Shares withheld to pay taxes, long-term incentive plan	(59)	$ 6	(65)
Shares withheld to pay taxes, long-term incentive plan (in shares)		27,603
Compensation expense, long-term incentive plan	1,378		1,378
Balance at Jun. 30, 2024	1,879,141	$ 12,753	161,834	1,796,111	(91,557)
Balance (in shares) at Jun. 30, 2024		61,205,969
Net Income (Loss)	51,330			51,330
Other comprehensive income (loss), net of tax	62,512				62,512
Common stock dividends paid ($0.23 per share)	(14,209)			(14,209)
Shares withheld to pay taxes, long-term incentive plan	(8)		(8)
Shares withheld to pay taxes, long-term incentive plan (in shares)		637
Compensation expense, long-term incentive plan	1,330		1,330
Balance at Sep. 30, 2024	$ 1,980,096	$ 12,753	$ 163,156	$ 1,833,232	$ (29,045)
Balance (in shares) at Sep. 30, 2024	61,206,606	61,206,606

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in dollars per share)	$ 0.23	$ 0.23	$ 0.23	$ 0.23	$ 0.23	$ 0.23

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities
Net Income (Loss)	$ 166,697	$ 129,366
Adjustments to reconcile net income to net cash provided by operating activities:
PCL	33,793	17,884
Depreciation and amortization	28,405	26,129
Net amortization of securities	(4,684)	4,590
Securities (gains) losses, net	182,792	0
Gains on sales of loans, net	(14,808)	(10,923)
Gain on disposition of business	(228,272)	0
Compensation expense, long-term incentive plan	4,946	4,772
Deferred income tax provision	21,500	(470)
Proceeds from sales of loans held for sale	858,895	903,938
Purchases and originations of loans held for sale	(864,682)	(934,136)
Originations of mortgage servicing rights	(9,419)	(11,025)
Earnings on bank-owned life insurance	(2,640)	(3,868)
Net change in other assets	(21,824)	5,043
Net change in other liabilities	(113,944)	9,922
Other operating activities, net	(19,089)	(8,520)
Net cash from operating activities	17,666	132,702
Investing Activities
Proceeds from maturities, prepayments and calls of securities held to maturity	89,686	79,680
Proceeds from maturities, prepayments and calls of securities available for sale	186,328	237,752
Proceeds from sales of securities available for sale	1,378,272	0
Purchases of securities held to maturity	(10,644)	(11,843)
Purchases of securities available for sale	(1,475,357)	0
Net proceeds from bank-owned life insurance	(27)	(27)
Net change in federal funds sold and securities purchased under reverse repurchase agreements	(10,000)	4,000
Net change in member bank stock	6,400	(3,358)
Net change in LHFI	(223,867)	(617,614)
Proceeds from sale of 1-4 family mortgage loans	43,935	0
Purchases of premises and equipment	(19,530)	(33,105)
Proceeds from sales of premises and equipment	2,219	1,828
Proceeds from sales of other real estate	4,555	1,744
Purchases of software	(4,906)	(7,544)
Investments in tax credit and other partnerships	(12,807)	(11,041)
Proceeds from disposition of business, net	321,345	0
Other, net	200	0
Net cash from investing activities	275,802	(359,528)
Financing Activities
Net change in deposits	(328,828)	664,275
Net change in federal funds purchased and securities sold under repurchase agreements	(40,102)	(127,532)
Net change in short-term borrowings	(50,000)	(250,000)
Payments on long-term FHLB advances	(58)	(15)
Payments under finance lease obligations	(315)	(627)
Common stock dividends	(42,622)	(42,488)
Shares withheld to pay taxes, long-term incentive plan	(1,450)	(1,082)
Net cash from financing activities	(463,375)	242,531
Net change in cash and cash equivalents	(169,907)	15,705
Cash and cash equivalents at beginning of period	975,343	734,587
Cash and cash equivalents at end of period	$ 805,436	$ 750,292

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 51,330	$ 73,832	$ 41,535	$ 34,029	$ 45,037	$ 50,300	$ 166,697	$ 129,366

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Business, Basis of Financial St

Business, Basis of Financial Statement Presentation and Principles of Consolidation	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business, Basis of Financial Statement Presentation and Principles of Consolidation	Note 1 – Business, Basis of Financial Statement Presentation and Principles of Consolidation Trustmark Corporation (Trustmark) is a bank holding company headquartered in Jackson, Mississippi. Through its subsidiaries, Trustmark operates as a financial services organization providing banking and financial solutions to corporate institutions and individual customers through offices in Alabama, Florida, Georgia, Mississippi, Tennessee and Texas. The consolidated financial statements include the accounts of Trustmark and all other entities in which Trustmark has a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements, and notes thereto, included in Trustmark’s Annual Report on Form 10-K for its fiscal year ended December 31, 2023 (2023 Annual Report). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. In the opinion of Management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of these consolidated financial statements have been included. The preparation of financial statements in conformity with these accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting periods and the related disclosures. Although Management’s estimates contemplate current conditions and how they are expected to change in the future, it is reasonably possible that in 2024 actual conditions could vary from those anticipated, which could affect Trustmark’s financial condition and results of operations. Actual results could differ from those estimates.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Note 2 - Discontinued Operations On May 31, 2024, Trustmark National Bank (TNB) completed the sale of its wholly owned subsidiary, Fisher Brown Bottrell Insurance, Inc. (FBBI), to Marsh & McLennan Agency LLC (MMA) for approximately $ 336.9 million in cash. The transaction resulted in a pre-tax net gain of $ 228.3 million. The gain, along with FBBI's historical financial results for periods prior to the sale, is reflected in Trustmark's consolidated financial statements as discontinued operations. The assets and liabilities of FBBI have been presented as "Assets of discontinued operations" and "Liabilities of discontinued operations" on the consolidated balance sheet at December 31, 2023. FBBI's operating results have been presented as "Discontinued operations" within the accompanying consolidated statements of income (loss) and prior period amounts have been reclassified to conform with the current period presentation. Cash flows from both continuing and discontinued operations are included in the Consolidated Statements of Cash Flows. The following table summarizes financial information related to FBBI which has been segregated from continuing operations and reported as discontinued operations for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Noninterest income: Insurance commissions $ — $ 15,303 $ 27,728 $ 44,372 Gain on sale of discontinued operations, net — — 228,272 — Other, net — — 527 954 Total noninterest income — 15,303 256,527 45,326 Noninterest expense: Salaries and employee benefits — 9,292 16,263 27,718 Services and fees — 410 704 1,245 Net occupancy - premises — 232 269 757 Equipment expense — 61 93 238 Other expense — 659 2,046 2,031 Total noninterest expense — 10,654 19,375 31,989 Income from discontinued operations before income taxes — 4,649 237,152 13,337 Income taxes from discontinued operations — 1,173 59,353 3,373 Income from discontinued operations $ — $ 3,476 $ 177,799 $ 9,964 The assets and liabilities of discontinued operations on the consolidated balance sheet at December 31, 2023 were as follows ($ in thousands): December 31, 2023 Carrying amounts of assets included as part of discontinued operations: Cash and due from banks $ 200 Premises and equipment, net 308 Goodwill 49,633 Identifiable intangible assets, net 2,729 Operating lease right-of-use assets 2,431 Other assets 12,333 Assets of discontinued operations $ 67,634 Carrying amounts of liabilities included as part of discontinued operations: Operating lease liabilities $ 2,487 Other liabilities 9,540 Liabilities of discontinued operations $ 12,027

Securities Available for Sale a

Securities Available for Sale and Held to Maturity	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale and Held to Maturity	Note 3 – Securities Available for Sale and Held to Maturity The following tables are a summary of the amortized cost and estimated fair value of securities available for sale and held to maturity at September 30, 2024 and December 31, 2023 ($ in thousands): Securities Available for Sale Securities Held to Maturity September 30, 2024 Amortized Gross Gross Estimated Amortized Gross Gross Estimated U.S. Treasury securities $ 198,426 $ 4,212 $ — $ 202,638 $ 29,648 $ 232 $ — $ 29,880 U.S. Government agency 19,494 — ( 159 ) 19,335 — — — — Mortgage-backed securities Residential mortgage pass- Guaranteed by GNMA 27,787 15 ( 2,004 ) 25,798 17,773 3 ( 407 ) 17,369 Issued by FNMA and 1,086,688 32,970 ( 14,348 ) 1,105,310 436,177 2,104 ( 11,088 ) 427,193 Other residential mortgage- Issued or guaranteed by — — — — 131,348 — ( 6,179 ) 125,169 Commercial mortgage-backed Issued or guaranteed by 359,160 14,326 ( 772 ) 372,714 743,412 139 ( 26,995 ) 716,556 Total $ 1,691,555 $ 51,523 $ ( 17,283 ) $ 1,725,795 $ 1,358,358 $ 2,478 $ ( 44,669 ) $ 1,316,167 Securities Available for Sale Securities Held to Maturity December 31, 2023 Amortized Gross Gross Estimated Amortized Gross Gross Estimated U.S. Treasury Securities $ 396,179 $ — $ ( 23,811 ) $ 372,368 $ 29,068 $ — $ ( 26 ) $ 29,042 U.S. Government agency 6,207 1 ( 416 ) 5,792 — — — — Obligations of states and — — — — 340 — — 340 Mortgage-backed securities Residential mortgage pass- Guaranteed by GNMA 25,744 4 ( 2,613 ) 23,135 13,005 — ( 497 ) 12,508 Issued by FNMA and 1,338,256 32 ( 161,490 ) 1,176,798 469,593 — ( 18,205 ) 451,388 Other residential mortgage- Issued or guaranteed by 92,076 — ( 6,002 ) 86,074 154,466 — ( 10,113 ) 144,353 Commercial mortgage-backed Issued or guaranteed by 100,545 — ( 1,834 ) 98,711 759,807 51 ( 41,985 ) 717,873 Total $ 1,959,007 $ 37 $ ( 196,166 ) $ 1,762,878 $ 1,426,279 $ 51 $ ( 70,826 ) $ 1,355,504 During 2022, Trustmark reclassified a total of $ 766.0 million of securities available for sale to securities held to maturity. At the date of these transfers, the net unrealized holding loss on the available for sale securities totaled approximately $ 91.9 million ($ 68.9 million, net of tax). The securities were transferred at fair value, which became the cost basis for the securities held to maturity. The net unrealized holding loss will be amortized over the remaining life of the securities as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. There were no gains or losses recognized as a result of these transfers. At September 30, 2024 , the net unamortized, unrealized loss on transferred securities included in accumulated other comprehensive income (loss) in the accompanying balance sheet totaled $ 49.3 million compared to $ 57.6 million at December 31, 2023. ACL on Securities Securities Available for Sale Quarterly, Trustmark evaluates if any security has a fair value less than its amortized cost. Once these securities are identified, in order to determine whether a decline in fair value resulted from a credit loss or other factors, Trustmark performs further analysis. If Trustmark determines that a credit loss exists, the credit portion of the allowance is measured using a discounted cash flow (DCF) analysis using the effective interest rate as of the security’s purchase date. The amount of credit loss recorded by Trustmark is limited to the amount by which the amortized cost exceeds the fair value. The DCF analysis utilizes contractual maturities, as well as third-party credit ratings and cumulative default rates published annually by Moody’s Investor Service (Moody’s). At both September 30, 2024 and December 31, 2023 , the results of the analysis did not identify any securities that warranted DCF analysis, and no credit loss was recognized on any of the securities available for sale. Accrued interest receivable is excluded from the estimate of credit losses for securities available for sale. At September 30, 2024 , accrued interest receivable totaled $ 5.1 million for securities available for sale compared to $ 3.7 million December 31, 2023 and was reported in other assets on the accompanying consolidated balance sheet. Securities Held to Maturity At September 30, 2024 , Trustmark identified no securities held to maturity with the potential for credit loss exposure, compared to $ 340 thousand at December 31, 2023 , which consisted of municipal securities. After applying appropriate analysis, the total amount of current expected credit losses was zero at September 30, 2024 and immaterial at December 31, 2023. No reserve was recorded at either September 30, 2024 or December 31, 2023. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity. At September 30, 2024 , accrued interest receivable totaled $ 2.5 million for securities held to maturity compared to $ 2.6 million at December 31, 2023 and was reported in other assets on the accompanying consolidated balance sheet. At both September 30, 2024 and December 31, 2023, Trustmark had no securities held to maturity that were past due 30 days or more as to principal or interest payments. Trustmark had no securities held to maturity classified as nonaccrual at September 30, 2024 and December 31, 2023 . Trustmark monitors the credit quality of securities held to maturity on a monthly basis through credit ratings. The following table presents the amortized cost of Trustmark’s securities held to maturity by credit rating, as determined by Moody’s, at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Aaa $ 1,358,358 $ 1,425,939 Not Rated (1) — 340 Total $ 1,358,358 $ 1,426,279 (1) Not rated securities primarily consist of Mississippi municipal general obligations. The tables below include securities with gross unrealized losses for which an allowance for credit losses has not been recorded segregated by length of impairment at September 30, 2024 and December 31, 2023 ($ in thousands): Less than 12 Months 12 Months or More Total September 30, 2024 Estimated Gross Estimated Gross Estimated Gross U.S. Government agency obligations $ 19,335 $ ( 159 ) $ — $ — $ 19,335 $ ( 159 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 11,089 ( 51 ) 29,760 ( 2,360 ) 40,849 ( 2,411 ) Issued by FNMA and FHLMC 18,133 ( 72 ) 254,346 ( 25,364 ) 272,479 ( 25,436 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 125,169 ( 6,179 ) 125,169 ( 6,179 ) Commercial mortgage-backed securities Issued or guaranteed by FNMA, — — 792,767 ( 27,767 ) 792,767 ( 27,767 ) Total $ 48,557 $ ( 282 ) $ 1,202,042 $ ( 61,670 ) $ 1,250,599 $ ( 61,952 ) December 31, 2023 U.S. Treasury Securities $ 29,042 $ ( 26 ) $ 372,368 $ ( 23,811 ) $ 401,410 $ ( 23,837 ) U.S. Government agency obligations — — 5,791 ( 416 ) 5,791 ( 416 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 9,381 ( 172 ) 25,967 ( 2,938 ) 35,348 ( 3,110 ) Issued by FNMA and FHLMC 309,466 ( 3,274 ) 1,311,865 ( 176,421 ) 1,621,331 ( 179,695 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 230,368 ( 16,115 ) 230,368 ( 16,115 ) Commercial mortgage-backed securities Issued or guaranteed by FNMA, 1,656 ( 13 ) 812,520 ( 43,806 ) 814,176 ( 43,819 ) Total $ 349,545 $ ( 3,485 ) $ 2,758,879 $ ( 263,507 ) $ 3,108,424 $ ( 266,992 ) The unrealized losses shown above are due to increases in market rates over the yields available at the time of purchase of the underlying securities and not credit quality. Trustmark does not intend to sell these securities and it is more likely than not that Trustmark will not be required to sell the investments before recovery of their amortized cost bases, which may be at maturity. Security Gains and Losses Realized gains and losses are determined using the specific identification method and are included in noninterest income (loss) as security gains (losses), net. For the periods presented, gross realized losses as a result of calls and dispositions of securities, as well as any associated proceeds, are shown below ($ in thousands). There were no gross realized gains during the periods presented. Three Months Ended September 30, Nine Months Ended September 30, Available for Sale 2024 2023 2024 2023 Proceeds from calls and sales of securities $ — $ — $ 1,378,272 $ — Gross realized (losses) — — ( 182,792 ) — During the second quarter of 2024, Trustmark restructured its investment securities portfolio by selling $ 1.561 billion of available for sale securities with an average yield of 1.36 %, which generated a loss of $ 182.8 million ($ 137.1 million, net of taxes) and was recorded to noninterest income (loss) in security gains (losses), net. Proceeds from the sale were used to purchase $ 1.378 billion of available for sale securities with an average yield of 4.85 %. Securities Pledged Securities with a carrying value of $ 2.038 billion and $ 2.321 billion at September 30, 2024 and December 31, 2023, respectively, were pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law. At both September 30, 2024 and December 31, 2023 , none of these securities were pledged under the Federal Reserve Discount Window program to provide additional contingency funding capacity. Contractual Maturities The amortized cost and estimated fair value of securities available for sale and held to maturity at September 30, 2024, by contractual maturity, are shown below ($ in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities Securities Amortized Estimated Amortized Estimated Due in one year or less $ 42,751 $ 42,962 $ — $ — Due after one year through five years 75,223 76,656 29,648 29,880 Due after five years through ten years 99,946 102,355 — — 217,920 221,973 29,648 29,880 Mortgage-backed securities 1,473,635 1,503,822 1,328,710 1,286,287 Total $ 1,691,555 $ 1,725,795 $ 1,358,358 $ 1,316,167

LHFI and ACL, LHFI

LHFI and ACL, LHFI	9 Months Ended
	Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
LHFI and ACL, LHFI	Note 4 – LHFI and ACL, LHFI At September 30, 2024 and December 31, 2023, LHFI consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Loans secured by real estate: Construction, land development and other land $ 614,787 $ 642,886 Other secured by 1-4 family residential properties 647,843 622,397 Secured by nonfarm, nonresidential properties 3,582,552 3,489,434 Other real estate secured 1,475,798 1,312,551 Other loans secured by real estate: Other construction 973,469 867,793 Secured by 1-4 family residential properties 2,247,163 2,282,318 Commercial and industrial loans 1,767,079 1,922,910 Consumer loans 152,611 165,734 State and other political subdivision loans 996,002 1,088,466 Other commercial loans and leases 642,807 556,035 LHFI 13,100,111 12,950,524 Less ACL 157,929 139,367 Net LHFI $ 12,942,182 $ 12,811,157 Accrued interest receivable is not included in the amortized cost basis of Trustmark’s LHFI. At September 30, 2024 and December 31, 2023 , accrued interest receivable for LHFI totaled $ 69.6 million and $ 71.0 million, respectively, with no related ACL and was reported in other assets on the accompanying consolidated balance sheet. Loan Concentrations Trustmark does not have any loan concentrations other than those reflected in the preceding table, which exceed 10 % of total LHFI. At September 30, 2024 , Trustmark’s geographic loan distribution was concentrated primarily in its six key market regions: Alabama, Florida, Georgia, Mississippi, Tennessee and Texas. Accordingly, the ultimate collectability of a substantial portion of these loans is susceptible to changes in market conditions in these areas. Nonaccrual and Past Due LHFI No material interest income was recognized in the income statement on nonaccrual LHFI for each of the periods ended September 30, 2024 and 2023. The following tables provide the amortized cost basis of loans on nonaccrual status and loans past due 90 days or more still accruing interest at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Nonaccrual With No ACL Total Nonaccrual Loans Past Due 90 Days or More Still Accruing Loans secured by real estate: Construction, land development and other land $ — $ 362 $ — Other secured by 1-4 family residential properties 870 6,168 889 Secured by nonfarm, nonresidential properties 10,558 12,156 — Other real estate secured 1,989 2,122 — Other loans secured by real estate: Other construction — 60 — Secured by 1-4 family residential properties 1,577 19,966 4,019 Commercial and industrial loans 23 31,710 — Consumer loans — 243 444 Other commercial loans and leases — 1,038 — Total $ 15,017 $ 73,825 $ 5,352 December 31, 2023 Nonaccrual With No ACL Total Nonaccrual Loans Past Due 90 Days or More Still Accruing Loans secured by real estate: Construction, land development and other land $ 2,020 $ 2,642 $ — Other secured by 1-4 family residential properties 946 6,518 1,238 Secured by nonfarm, nonresidential properties 20,812 23,061 54 Other real estate secured — 158 106 Other loans secured by real estate: Other construction — 62 — Secured by 1-4 family residential properties 3,235 43,815 3,740 Commercial and industrial loans 79 22,303 24 Consumer loans — 243 628 Other commercial loans and leases — 1,206 — Total $ 27,092 $ 100,008 $ 5,790 The following tables provide an aging analysis of the amortized cost basis of past due LHFI (including nonaccrual LHFI) at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total LHFI Loans secured by real estate: Construction, land development and $ 249 $ 213 $ 188 $ 650 $ 614,137 $ 614,787 Other secured by 1-4 family residential 6,054 2,588 3,748 12,390 635,453 647,843 Secured by nonfarm, nonresidential 2,137 3,917 793 6,847 3,575,705 3,582,552 Other real estate secured 518 — 28 546 1,475,252 1,475,798 Other loans secured by real estate: Other construction 60 — — 60 973,409 973,469 Secured by 1-4 family residential properties 18,517 7,316 14,313 40,146 2,207,017 2,247,163 Commercial and industrial loans 4,221 421 9,391 14,033 1,753,046 1,767,079 Consumer loans 1,788 628 448 2,864 149,747 152,611 State and other political subdivision loans 44 — — 44 995,958 996,002 Other commercial loans and leases 2,407 8 20 2,435 640,372 642,807 Total $ 35,995 $ 15,091 $ 28,929 $ 80,015 $ 13,020,096 $ 13,100,111 December 31, 2023 Past Due 30-59 Days 60-89 Days 90 Days More Total Past Due Current Total LHFI Loans secured by real estate: Construction, land development and $ 93 $ 507 $ 2,362 $ 2,962 $ 639,924 $ 642,886 Other secured by 1-4 family residential 4,493 1,687 2,716 8,896 613,501 622,397 Secured by nonfarm, nonresidential 1,531 1,063 727 3,321 3,486,113 3,489,434 Other real estate secured 126 — 207 333 1,312,218 1,312,551 Other loans secured by real estate: Other construction 62 — — 62 867,731 867,793 Secured by 1-4 family residential properties 19,298 9,327 22,164 50,789 2,231,529 2,282,318 Commercial and industrial loans 11,881 484 499 12,864 1,910,046 1,922,910 Consumer loans 2,112 772 647 3,531 162,203 165,734 State and other political subdivision loans 152 — — 152 1,088,314 1,088,466 Other commercial loans and leases 1,247 58 — 1,305 554,730 556,035 Total $ 40,995 $ 13,898 $ 29,322 $ 84,215 $ 12,866,309 $ 12,950,524 Modified LHFI Occasionally, Trustmark modifies loans for borrowers experiencing financial difficulties by providing payment concessions, interest-only payments for an extended period of time, maturity extensions or interest rate reductions. Other concessions may arise from court proceedings or may be imposed by law. In some cases, Trustmark provides multiple types of concessions on one loan. The following tables present the amortized cost of LHFI at the end of each of the periods presented of loans modified to borrowers experiencing financial difficulty disaggregated by class of loan and type of modification ($ in thousands). The percentage of the amortized cost basis of LHFI that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of LHFI is also presented below: Three Months Ended September 30, 2024 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 886 $ 886 0.14 % Other loans secured by real estate: Secured by 1-4 family residential properties — 30 30 0.00 % Commercial and industrial loans 6,207 — 6,207 0.35 % Total $ 6,207 $ 916 $ 7,123 0.05 % Three Months Ended September 30, 2023 Term Extension % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ 96 0.02 % Other loans secured by real estate: Secured by 1-4 family residential properties 346 0.02 % Total $ 442 0.00 % Nine Months Ended September 30, 2024 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ — $ 2,638 $ 2,638 0.41 % Other loans secured by real estate: Secured by 1-4 family residential properties — 30 30 0.00 % Commercial and industrial loans 6,207 — 6,207 0.35 % Total $ 6,207 $ 2,668 $ 8,875 0.07 % Nine Months Ended September 30, 2023 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ — $ 494 $ 494 0.08 % Secured by nonfarm, nonresidential — 370 370 0.01 % Other loans secured by real estate: Secured by 1-4 family residential properties — 912 912 0.04 % Commercial and industrial loans 255 — 255 0.01 % Consumer loans — 40 40 0.02 % Other commercial loans and leases 116 31 147 0.03 % Total $ 371 $ 1,847 $ 2,218 0.02 % The following tables detail the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the periods presented: Three Months Ended September 30, 2024 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified two loans and seven lines of credit to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified one loan to amortize over 24 month term Commercial and industrial loans Thirty-four month principal payment deferral Three Months Ended September 30, 2023 Financial Effect Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified lines of credit to amortize over 12 month and 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Extended amortization on loans with term adjusted by weighted-average 10.6 years Nine Months Ended September 30, 2024 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified three loans and twenty-seven lines to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified one loan to amortize over 24 month term Commercial and industrial loans Thirty-four month principal payment deferral Nine Months Ended September 30, 2023 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified lines of credit to amortize over 12 month and 24 month terms Secured by nonfarm, nonresidential properties One loan renewed and extended maturity by six months Other loans secured by real estate: Secured by 1-4 family residential properties Extended amortization with term adjusted by weighted-average 3.2 years Commercial and industrial loans Six month payment deferrals Consumer loans Bankruptcies extended amortization with term adjusted by weighted average 1.3 years reducing borrower payment Other commercial loans and leases Six month payment deferral One loan renewed and extended maturity by seven months Trustmark had no unused commitments on modified loans to borrowers experiencing financial difficulty at September 30, 2024. During the nine months ended September 30, 2024 and 2023, payment defaults of LHFI that were modified within the twelve months prior to that default to borrowers experiencing financial difficulty were immaterial. Trustmark has utilized loans 90 days or more past due to define payment default in determining modified loans that have subsequently defaulted. If Trustmark determines that a modified loan (or a portion of a loan) has subsequently been deemed uncollectible, the loan (or a portion of the loan) is charged off against the ACL, LHFI. Trustmark closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following tables provide details of the performance of such LHFI that have been modified during the periods presented ($ in thousands): Three Months Ended September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ — $ — $ — $ — $ 886 $ 886 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 30 30 Commercial and industrial loans — — — — 6,207 6,207 Total $ — $ — $ — $ — $ 7,123 $ 7,123 Three Months Ended September 30, 2023 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ — $ — $ — $ — $ 96 $ 96 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 346 346 Total $ — $ — $ — $ — $ 442 $ 442 Nine Months Ended September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ 114 $ 50 $ 42 $ 206 $ 2,432 $ 2,638 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 30 30 Commercial and industrial loans — — — — 6,207 6,207 Total $ 114 $ 50 $ 42 $ 206 $ 8,669 $ 8,875 Nine Months Ended September 30, 2023 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ 272 $ — $ — $ 272 $ 222 $ 494 Secured by nonfarm, nonresidential — — — — 370 370 Other loans secured by real estate: Secured by 1-4 family residential properties 170 — — 170 742 912 Commercial and industrial loans — — — — 255 255 Consumer loans 20 — — 20 20 40 Other commercial loans and leases — — — — 147 147 Total $ 462 $ — $ — $ 462 $ 1,756 $ 2,218 Collateral-Dependent Loans The following tables present the amortized cost basis of collateral-dependent loans by class of loans and collateral type as of September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Other secured by 1-4 family $ 870 $ — $ — $ 870 Secured by nonfarm, nonresidential 10,558 — — 10,558 Other real estate secured 1,989 — — 1,989 Other loans secured by real estate: Secured by 1-4 family residential 1,577 — — 1,577 Commercial and industrial loans — 2,086 27,554 29,640 Other commercial loans and leases — — 906 906 Total $ 14,994 $ 2,086 $ 28,460 $ 45,540 December 31, 2023 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Construction, land development and $ 2,020 $ — $ — $ 2,020 Other secured by 1-4 family 946 — — 946 Secured by nonfarm, nonresidential 20,812 — — 20,812 Other loans secured by real estate: Secured by 1-4 family residential 3,235 — — 3,235 Commercial and industrial loans 38 41 21,023 21,102 Other commercial loans and leases — — 967 967 Total $ 27,051 $ 41 $ 21,990 $ 49,082 A loan is collateral dependent when the borrower is experiencing financial difficulty and repayment of the loan is expected to be provided substantially through the sale of the collateral. The following provides a qualitative description by class of loan of the collateral that secures Trustmark’s collateral-dependent LHFI: • Loans secured by real estate – Loans within these loan classes are secured by liens on real estate properties. There have been no significant changes to the collateral that secures these financial assets during the period. • Other loans secured by real estate – Loans within these loan classes are secured by liens on real estate properties. There have been no significant changes to the collateral that secures these financial assets during the period. • Commercial and industrial loans – Loans within this loan class are primarily secured by inventory, accounts receivables, equipment and other non-real estate collateral. During the quarter, three relationships had decreases in collateral value that secures the credit. There have been no other significant changes to the collateral that secures these financial assets during the period. • State and other political subdivision loans – Loans within this loan class are secured by liens on real estate properties or other non-real estate collateral. There have been no significant changes to the collateral that secures these financial assets during the period. • Other commercial loans – Loans within this loan class are secured by non-real estate collateral. There have been no significant changes to the collateral that secures these financial assets during the period. Credit Quality Indicators Trustmark’s LHFI portfolio credit quality indicators focus on six key quality ratios that are compared against bank tolerances. The loan indicators are total classified outstanding, total criticized outstanding, nonperforming loans, nonperforming assets, delinquencies and net loan losses. Due to the homogeneous nature of consumer loans, Trustmark does not assign a formal internal risk rating to each credit and therefore the criticized and classified measures are primarily composed of commercial loans. In addition to monitoring portfolio credit quality indicators, Trustmark also measures how effectively the lending process is being managed and risks are being identified. As part of an ongoing monitoring process, Trustmark grades the commercial portfolio segment as it relates to credit file completion and financial statement exceptions, underwriting, collateral documentation and compliance with law as shown below: • Credit File Completeness and Financial Statement Exceptions – evaluates the quality and condition of credit files in terms of content and completeness and focuses on efforts to obtain and document sufficient information to determine the quality and status of credits. Also included is an evaluation of the systems/procedures used to ensure compliance with policy. • Underwriting – evaluates whether credits are adequately analyzed, appropriately structured and properly approved within loan policy requirements. A properly approved credit is approved by an adequate authority in a timely manner with all conditions of approval fulfilled. Total policy exceptions measure the level of underwriting and other policy exceptions within a portfolio segment. • Collateral Documentation – focuses on the adequacy of documentation to perfect Trustmark’s collateral position and substantiate collateral value. Collateral exceptions measure the level of documentation exceptions within a portfolio segment. Collateral exceptions occur when certain collateral documentation is either not present or not current. • Compliance with Law – focuses on underwriting, documentation, approval and reporting in compliance with banking laws and regulations. Primary emphasis is directed to the Financial Institutions Reform, Recovery and Enforcement Act of 1989 (FIRREA), Regulation O requirements and regulations governing appraisals. Commercial Credits Trustmark has established a loan grading system that consists of ten individual credit risk grades (risk ratings) that encompass a range from loans where the expectation of loss is negligible to loans where loss has been established. The model is based on the risk of default for an individual credit and establishes certain criteria to delineate the level of risk across the ten unique credit risk grades. Credit risk grade definitions are as follows: • Risk Rate (RR) 1 through RR 6 – Grades one through six represent groups of loans that are not subject to criticism as defined in regulatory guidance. Loans in these groups exhibit characteristics that represent low to moderate risk measured by using a variety of credit risk criteria such as cash flow coverage, debt service coverage, balance sheet leverage, liquidity, management experience, industry position, prevailing economic conditions, support from secondary sources of repayment and other credit factors that may be relevant to a specific loan. In general, these loans are supported by properly margined collateral and guarantees of principal parties. • Other Assets Especially Mentioned (Special Mention) (RR 7) – a loan that has a potential weakness that if not corrected will lead to a more severe rating. This rating is for credits that are currently protected but potentially weak because of an adverse feature or condition that if not corrected will lead to a further downgrade. • Substandard (RR 8) – a loan that has at least one identified weakness that is well defined. This rating is for credits where the primary sources of repayment are not viable at the time of evaluation or where either the capital or collateral is not adequate to support the loan and the secondary means of repayment do not provide a sufficient level of support to offset the identified weakness. Loss potential exists in the aggregate amount of substandard loans but does not necessarily exist in individual loans. • Doubtful (RR 9) – a loan with an identified weakness that does not have a valid secondary source of repayment. Generally, these credits have an impaired primary source of repayment and secondary sources are not sufficient to prevent a loss in the credit. The exact amount of the loss has not been determined at this time. • Loss (RR 10) – a loan or a portion of a loan that is deemed to be uncollectible. By definition, credit risk grades special mention (RR 7), substandard (RR 8), doubtful (RR 9) and loss (RR 10) are criticized loans while substandard (RR 8), doubtful (RR 9) and loss (RR 10) are classified loans. These definitions are standardized by the bank regulatory agencies and are generally equally applied to each individual lending institution. The remaining credit risk grades are considered pass credits and are solely defined by Trustmark. To enhance this process, Trustmark has determined that certain loans will be individually assessed, and a formal analysis will be performed and based upon the analysis the loan will be written down to the net realizable value. Trustmark will individually assess and remove loans from the pool in the following circumstances: • Commercial nonaccrual loans with total exposure of $ 500 thousand (excluding those portions of the debt that are government guaranteed or are secured by Trustmark deposits or marketable securities) or more. • Any loan that is believed to not share similar risk characteristics with the rest of the pool will be individually assessed. Otherwise, the loan will be left within the pool based on the results of the assessment. • Commercial accruing loans deemed to be a modified loan to a borrower experiencing financial difficulty with total exposure of $ 500 thousand (excluding those portions of the debt that are government guaranteed or are secured by Trustmark deposits or marketable securities) or more. If the loan is believed to not share similar risk characteristics with the rest of the loan pool, the loan will be individually assessed. Otherwise, the loan will be left within the pool and monitored on an ongoing basis. Each loan officer assesses the appropriateness of the internal risk rating assigned to their credits on an ongoing basis. Trustmark’s Asset Review area conducts independent credit quality reviews of the majority of Trustmark’s commercial loan portfolio both on the underlying credit quality of each individual loan class as well as the adherence to Trustmark’s loan policy and the loan administration process. In addition to the ongoing internal risk rate monitoring described above, Trustmark’s Credit Quality Review Committee meets monthly and performs a review of all loans of $ 100 thousand or more that are either delinquent 30 days or more or on nonaccrual. This review includes recommendations regarding risk ratings, accrual status, charge-offs and appropriate servicing officer as well as evaluation of problem credits for determination of modified status. Quarterly, the Credit Quality Review Committee reviews and modifies continuous action plans for all credits risk rated seven or worse for relationships of $100 thousand or more. In addition, periodic reviews of significant development, construction, multi-family, nonowner-occupied and other commercial credits are performed. These reviews assess each particular project with respect to location, project valuations, progress of completion, leasing status, current financial information, rents, operating expenses, cash flow, adherence to budget and projections and other information that is pertinent to the particular type of credit as applicable. Summary results are reviewed by Senior and Regional Credit Officers in addition to the Chief Credit Officer with a determination made as to the appropriateness of existing risk ratings and accrual status. Consumer Credits The Retail Credit Review Committee, Management Credit Policy Committee and the Enterprise Risk Committee review the volume and percentage of consumer loan delinquencies and losses to monitor the overall quality of the consumer portfolio. Trustmark monitors the levels and severity of past due consumer LHFI on a daily basis through its collection activities. A detailed assessment of consumer LHFI delinquencies is performed monthly at both a product and market level. The tables below present the amortized cost basis of loans by credit quality indicator and class of loans based on analyses performed at September 30, 2024 and December 31, 2023 ($ in thousands): Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Commercial LHFI Loans secured by real estate: Construction, land Pass - RR 1 through RR 6 $ 313,423 $ 115,646 $ 39,923 $ 25,444 $ 8,471 $ 2,409 $ 42,086 $ 547,402 Special Mention - RR 7 2,575 989 — — — — 553 4,117 Substandard - RR 8 5 65 64 — 17 — 165 316 Doubtful - RR 9 — — — — — — — — Total 316,003 116,700 39,987 25,444 8,488 2,409 42,804 551,835 Current period gross — — — — — ( 24 ) — ( 24 ) Other secured by 1-4 family Pass - RR 1 through RR 6 $ 23,695 $ 25,412 $ 23,921 $ 25,271 $ 12,086 $ 3,804 $ 7,859 $ 122,048 Special Mention - RR 7 27 — — 36 — — — 63 Substandard - RR 8 51 887 578 334 — 202 30 2,082 Doubtful - RR 9 — — — — — — — — Total 23,773 26,299 24,499 25,641 12,086 4,006 7,889 124,193 Current period gross — — — — — ( 12 ) — ( 12 ) Secured by nonfarm, Pass - RR 1 through RR 6 $ 498,807 $ 416,459 $ 936,901 $ 475,161 $ 481,754 $ 420,554 $ 101,623 $ 3,331,259 Special Mention - RR 7 — — 55,301 — 32,937 3,400 — 91,638 Substandard - RR 8 8,664 6,847 34,486 28,222 23,510 57,905 — 159,634 Doubtful - RR 9 13 — — — — 8 — 21 Total 507,484 423,306 1,026,688 503,383 538,201 481,867 101,623 3,582,552 Current period gross — — — ( 2,412 ) — ( 16 ) — ( 2,428 ) Other real estate secured: Pass - RR 1 through RR 6 $ 168,609 $ 97,427 $ 649,069 $ 260,090 $ 139,030 $ 44,283 $ 7,461 $ 1,365,969 Special Mention - RR 7 — — 25,348 27,448 — — 426 53,222 Substandard - RR 8 14,632 — 963 15,046 258 25,426 — 56,325 Doubtful - RR 9 42 — — — — — — 42 Total 183,283 97,427 675,380 302,584 139,288 69,709 7,887 1,475,558 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Commercial LHFI Other loans secured by real Other construction: Pass - RR 1 through RR 6 $ 90,334 $ 421,500 $ 305,414 $ 54,232 $ — $ — $ 29,914 $ 901,394 Special Mention - RR 7 — — 43,443 9,393 — — — 52,836 Substandard - RR 8 60 — — — 19,179 — — 19,239 Doubtful - RR 9 — — — — — — — — Total 90,394 421,500 348,857 63,625 19,179 — 29,914 973,469 Current period gross — — ( 2,494 ) — — — — ( 2,494 ) Commercial and industrial Pass - RR 1 through RR 6 $ 383,881 $ 380,031 $ 265,702 $ 102,706 $ 52,400 $ 45,251 $ 406,087 $ 1,636,058 Special Mention - RR 7 — 615 14,201 52 — — 18,877 33,745 Substandard - RR 8 7,496 1,923 57,073 12,683 970 367 16,216 96,728 Doubtful - RR 9 227 — 173 145 — 3 — 548 Total 391,604 382,569 337,149 115,586 53,370 45,621 441,180 1,767,079 Current period gross ( 128 ) ( 85 ) ( 430 ) ( 461 ) ( 86 ) ( 3,111 ) ( 85 ) ( 4,386 ) State and other political Pass - RR 1 through RR 6 $ 55,360 $ 121,591 $ 244,434 $ 157,287 $ 83,156 $ 331,105 $ 3,069 $ 996,002 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 — — — — — — — — Doubtful - RR 9 — — — — — — — — Total 55,360 121,591 244,434 157,287 83,156 331,105 3,069 996,002 Current period gross — — — — — — — — Other commercial loans and leases: Pass - RR 1 through RR 6 $ 145,848 $ 179,925 $ 19,906 $ 32,234 $ 17,013 $ 32,572 $ 212,999 $ 640,497 Special Mention - RR 7 — — 140 70 — — — 210 Substandard - RR 8 873 96 128 22 — — 981 2,100 Doubtful - RR 9 — — — — — — — — Total 146,721 180,021 20,174 32,326 17,013 32,572 213,980 642,807 Current period gross — — ( 28 ) — — ( 25 ) — ( 53 ) Total commercial $ 1,714,622 $ 1,769,413 $ 2,717,168 $ 1,225,876 $ 870,781 $ 967,289 $ 848,346 $ 10,113,495 Total commercial LHFI $ ( 128 ) $ ( 85 ) $ ( 2,952 ) $ ( 2,873 ) $ ( 86 ) $ ( 3,188 ) $ ( 85 ) $ ( 9,397 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Consumer LHFI Loans secured by real estate: Construction, land Current $ 21,981 $ 27,681 $ 4,712 $ 3,735 $ 1,079 $ 2,076 $ 1,175 $ 62,439 Past due 30-89 days — 311 118 — — 32 — 461 Past due 90 days or more — — — — — — — — Nonaccrual — — 23 4 — 25 — 52 Total 21,981 27,992 4,853 3,739 1,079 2,133 1,175 62,952 Current period gross — — — — — ( 8 ) — ( 8 ) Other secured by 1-4 family Current $ 19,886 $ 20,261 $ 7,529 $ 5,367 $ 3,747 $ 9,421 $ 444,331 $ 510,542 Past due 30-89 days 1,726 264 59 65 49 676 4,060 6,899 Past due 90 days or more 55 — 8 — — 162 615 840 Nonaccrual 35 29 66 46 104 586 4,503 5,369 Total 21,702 20,554 7,662 5,478 3,900 10,845 453,509 523,650 Current period gross ( 28 ) ( 29 ) ( 206 ) ( 40 ) ( 14 ) ( 52 ) — ( 369 ) Other real estate secured: Current $ 136 $ — $ — $ — $ 70 $ 34 $ — $ 240 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total 136 — — — 70 34 — 240 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Consumer LHFI Other loans secured by real Secured by 1-4 family Current $ 174,559 $ 234,420 $ 827,385 $ 471,999 $ 166,513 $ 325,051 $ — $ 2,199,927 Past due 30-89 days 632 4,345 10,101 5,510 850 1,815 — 23,253 Past due 90 days or more 273 828 2,359 327 198 34 — 4,019 Nonaccrual — 2,072 10,612 2,806 1,233 3,241 — 19,964 Total 175,464 241,665 850,457 480,642 168,794 330,141 — 2,247,163 Current period gross — ( 143 ) ( 9,466 ) ( 106 ) ( 1 ) ( 107 ) — ( 9,823 ) Consumer loans: Current $ 46,034 $ 27,761 $ 15,546 $ 5,548 $ 1,460 $ 235 $ 52,980 $ 149,564 Past due 30-89 days 697 422 238 40 1 8 954 2,360 Past due 90 days or more 49 26 15 — — — 353 443 Nonaccrual 24 30 77 67 23 — 23 244 Total 46,804 28,239 15,876 5,655 1,484 243 54,310 152,611 Current period gross ( 4,413 ) ( 650 ) ( 373 ) ( 94 ) ( 88 ) — ( 2,004 ) ( 7,622 ) Total consumer LHFI $ 266,087 $ 318,450 $ 878,848 $ 495,514 $ 175,327 $ 343,396 $ 508,994 $ 2,986,616 Total consumer LHFI $ ( 4,441 ) $ ( 822 ) $ ( 10,045 ) $ ( 240 ) $ ( 103 ) $ ( 167 ) $ ( 2,004 ) $ ( 17,822 ) Total LHFI $ 1,980,709 $ 2,087,863 $ 3,596,016 $ 1,721,390 $ 1,046,108 $ 1,310,685 $ 1,357,340 $ 13,100,111 Total current period $ ( 4,569 ) $ ( 907 ) $ ( 12,997 ) $ ( 3,113 ) $ ( 189 ) $ ( 3,355 ) $ ( 2,089 ) $ ( 27,219 ) Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Commercial LHFI Loans secured by real estate: Construction, land Pass - RR 1 through RR 6 $ 359,813 $ 98,742 $ 35,095 $ 10,591 $ 2,036 $ 1,961 $ 52,351 $ 560,589 Special Mention - RR 7 — — 360 — — — — 360 Substandard - RR 8 606 336 1,512 19 — 21 — 2,494 Doubtful - RR 9 — — — — — 24 — 24 Total 360,419 99,078 36,967 10,610 2,036 2,006 52,351 563,467 Current period gross — ( 4 ) ( 10 ) — ( 228 ) — — ( 242 ) Other secured by 1-4 family Pass - RR 1 through RR 6 $ 33,072 $ 30,760 $ 29,159 $ 14,309 $ 8,084 $ 2,822 $ 10,077 $ 128,283 Special Mention - RR 7 — 82 48 10 — — — 140 Substandard - RR 8 220 625 157 22 80 306 98 1,508 Doubtful - RR 9 — — — — — — — — Total 33,292 31,467 29,364 14,341 8,164 3,128 10,175 129,931 Current period gross — — ( 24 ) — — ( 6 ) — ( 30 ) Secured by nonfarm, Pass - RR 1 through RR 6 $ 501,327 $ 919,519 $ 526,412 $ 596,240 $ 323,687 $ 369,250 $ 129,142 $ 3,365,577 Special Mention - RR 7 4,271 14,930 — 138 23,966 — — 43,305 Substandard - RR 8 6,332 1,964 47,491 10,809 8,614 5,200 48 80,458 Doubtful - RR 9 21 — — — 53 13 — 87 Total 511,951 936,413 573,903 607,187 356,320 374,463 129,190 3,489,427 Current period gross — ( 39 ) ( 82 ) — ( 19 ) ( 138 ) — ( 278 ) Other real estate secured: Pass - RR 1 through RR 6 $ 194,141 $ 447,200 $ 332,818 $ 209,757 $ 56,024 $ 11,080 $ 8,880 $ 1,259,900 Special Mention - RR 7 126 2,076 — — 35,881 — — 38,083 Substandard - RR 8 — 14,064 — 290 — 39 — 14,393 Doubtful - RR 9 42 — — — — — — 42 Total 194,309 463,340 332,818 210,047 91,905 11,119 8,880 1,312,418 Current period gross — — — — — — — — Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Commercial LHFI Other loans secured by real Other construction Pass - RR 1 through RR 6 $ 179,676 $ 518,062 $ 149,883 $ 14,062 $ — $ 6 $ 6,042 $ 867,731 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 62 — — — — — — 62 Doubtful - RR 9 — — — — — — — — Total 179,738 518,062 149,883 14,062 — 6 6,042 867,793 Current period gross ( 61 ) — ( 3,392 ) — — — — ( 3,453 ) Commercial and industrial Pass - RR 1 through RR 6 $ 497,730 $ 474,737 $ 158,659 $ 80,646 $ 31,876 $ 44,972 $ 537,527 $ 1,826,147 Special Mention - RR 7 12,570 10,141 3,149 1,381 110 — 126 27,477 Substandard - RR 8 4,797 16,872 13,909 11,958 40 80 21,528 69,184 Doubtful - RR 9 6 58 1 — — 25 12 102 Total

Mortgage Banking

Mortgage Banking	9 Months Ended
	Sep. 30, 2024
Mortgage Banking [Abstract]
Mortgage Banking	Note 5 – Mortgage Banking MSR The activity in the MSR is detailed in the table below for the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Balance at beginning of period $ 131,870 $ 129,677 Origination of servicing assets 9,419 11,025 Change in fair value: Due to market changes ( 6,909 ) 8,735 Due to run-off ( 8,527 ) ( 7,058 ) Balance at end of period $ 125,853 $ 142,379 Trustmark determines the fair value of the MSR using a valuation model administered by a third party that calculates the present value of estimated future net servicing income. Trustmark considers the conditional prepayment rate (CPR), which is an estimated loan prepayment rate that uses historical prepayment rates for previous loans similar to the loans being evaluated, the float rate, which is the interest rate earned on escrow balances, and the discount rate as some of the primary assumptions used in determining the fair value of the MSR. An increase in either the CPR or discount rate assumption will result in a decrease in the fair value of the MSR, while a decrease in either assumption will result in an increase in the fair value of the MSR. An increase in the float rate will result in an increase in the fair value of the MSR, while a decrease in the float rate will result in a decrease in the fair value of the MSR. At September 30, 2024 , the fair value of the MSR included an assumed average prepayment speed of 9 CPR and an average discount rate of 10.64 % compared to an assumed average prepayment speed of 8 CPR and an average discount rate of 10.07 % at September 30, 2023. Mortgage Loans Serviced/Sold During the first nine months of 2024 and 2023 , Trustmark sold $ 843.6 million and $ 893.0 million, respectively, of residential mortgage loans. Gains on these sales were recorded as noninterest income in mortgage banking, net and totaled $ 14.8 million for the first nine months of 2024 compared to $ 11.4 million for the first nine months of 2023. The table below details the mortgage loans sold and serviced for others at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Federal National Mortgage Association $ 4,832,202 $ 4,826,028 Government National Mortgage Association 3,644,092 3,510,983 Federal Home Loan Mortgage Corporation 183,520 112,352 Other 31,424 28,012 Total mortgage loans sold and serviced for others $ 8,691,238 $ 8,477,375 Trustmark is subject to losses in its loan servicing portfolio due to loan foreclosures. Trustmark has obligations to either repurchase the outstanding principal balance of a loan or make the purchaser whole for the economic benefits of a loan if it is determined that the loan sold was in violation of representations or warranties made by Trustmark at the time of the sale, herein referred to as mortgage loan servicing putback expenses. Such representations and warranties typically include those made regarding loans that had missing or insufficient file documentation, loans that do not meet investor guidelines, loans in which the appraisal does not support the value and/or loans obtained through fraud by the borrowers or other third parties. Generally, putback requests may be made until the loan is paid in full. However, mortgage loans delivered to Federal National Mortgage Association (FNMA) and Federal Home Loan Mortgage Corporation (FHLMC) on or after January 1, 2013 are subject to the Representations and Warranties Framework, which provides certain instances in which FNMA and FHLMC will not exercise their remedies, including a putback request, for breaches of certain selling representations and warranties, such as payment history and quality control review. When a putback request is received, Trustmark evaluates the request and takes appropriate actions based on the nature of the request. Trustmark is required by FNMA and FHLMC to provide a response to putback requests within 60 days of the date of receipt. The total mortgage loan servicing putback expenses are included in other expense. At both September 30, 2024 and 2023 , Trustmark had a reserve for mortgage loan servicing putback expenses of $ 500 thousand. There is inherent uncertainty in reasonably estimating the requirement for reserves against potential future mortgage loan servicing putback expenses. Future putback expenses are dependent on many subjective factors, including the review procedures of the purchasers and the potential refinance activity on loans sold with servicing released and the subsequent consequences under the representations and warranties. Trustmark believes that it has appropriately reserved for potential mortgage loan servicing putback requests.

Other Real Estate

Other Real Estate	9 Months Ended
	Sep. 30, 2024
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate	Note 6 – Other Real Estate At September 30, 2024, Trustmark’s geographic other real estate distribution was concentrated in its Alabama, Mississippi and Texas market regions. The ultimate recovery of a substantial portion of the carrying amount of other real estate is susceptible to changes in market conditions in this area. For the periods presented, changes and gains (losses), net on other real estate were as follows ($ in thousands): Nine Months Ended September 30, 2024 2023 Balance at beginning of period $ 6,867 $ 1,986 Additions 4,703 5,434 Disposals ( 5,609 ) ( 1,903 ) (Write-downs) recoveries ( 2,041 ) ( 32 ) Balance at end of period $ 3,920 $ 5,485 Gains (losses), net on the sale of other real estate included in $ ( 1,054 ) $ ( 159 ) At September 30, 2024 and December 31, 2023, other real estate by type of property consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 1-4 family residential properties $ 1,629 $ 1,977 Nonfarm, nonresidential properties 2,291 4,835 Other real estate properties — 55 Total other real estate $ 3,920 $ 6,867 At September 30, 2024 and December 31, 2023, other real estate by geographic location consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Alabama $ 170 $ 1,397 Mississippi (1) 1,772 1,242 Texas 1,978 4,228 Total other real estate $ 3,920 $ 6,867 (1) Mississippi includes Central and Southern Mississippi Regions. (2) Tennessee includes Memphis, Tennessee and Northern Mississippi Regions. At September 30, 2024 , the balance of other real estate included $ 1.6 million of foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property compared to $ 2.0 million at December 31, 2023. At September 30, 2024 and December 31, 2023, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process was $ 7.7 million and $ 6.4 million, respectively.

Leases

Leases	9 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Leases	Note 7 – Leases Lessor Arrangements Trustmark leases certain types of machinery and equipment to its customers through sales-type and direct financing leases as part of its equipment financing portfolio. These leases generally have remaining lease terms of two to eight years , some of which include renewal options and/or options for the lessee to purchase the leased property near or at the end of the lease term. Trustmark recognized interest income from its sales-type and direct financing leases of $ 3.6 million and $ 9.1 million for the three and nine months ended September 30, 2024, respectively. Trustmark does not have any significant operating leases in which it is the lessor. The table below summarizes the components of Trustmark's net investment in its sales-type and direct financing leases for the periods presented ($ in thousands): September 30, 2024 December 31, 2023 Leases receivable $ 285,239 $ 161,319 Unearned income ( 48,170 ) ( 29,011 ) Initial direct costs 2,455 1,326 Unguaranteed lease residual 8,209 4,101 Total net investment $ 247,733 $ 137,735 The table below details the minimum future lease payments for Trustmark's leases receivable at September 30, 2024 ($ in thousands): September 30, 2024 2024 (excluding the nine months ended September 30, 2024) $ 13,948 2025 49,378 2026 48,274 2027 60,828 2028 49,986 Thereafter 62,825 Lease receivable $ 285,239 Lessee Arrangements For Trustmark's lessee arrangements, the leases of FBBI are included in discontinued operations, and as a result, have been excluded from the amounts below. Prior period amounts have been reclassified. The following table details the components of net lease cost for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Finance leases: Amortization of right-of-use assets $ 113 $ 113 $ 339 $ 673 Interest on lease liabilities 37 41 113 124 Operating lease cost 1,344 1,258 3,756 3,566 Short-term lease cost 61 51 173 181 Variable lease cost 218 192 623 639 Sublease income ( 58 ) ( 3 ) ( 63 ) ( 9 ) Net lease cost $ 1,715 $ 1,652 $ 4,941 $ 5,174 The following table details the cash payments included in the measurement of lease liabilities during the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Finance leases: Operating cash flows included in operating activities $ 113 $ 124 Financing cash flows included in payments under finance lease obligations 315 627 Operating leases: Operating cash flows (fixed payments) included in other operating activities, net 3,535 3,022 Operating cash flows (liability reduction) included in other operating activities, net 2,515 2,425 The following table details balance sheet information, as well as weighted-average lease terms and discount rates, related to leases at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Finance lease right-of-use assets, net of accumulated depreciation $ 3,412 $ 3,751 Finance lease liabilities 4,019 4,334 Operating lease right-of-use assets 36,034 35,711 Operating lease liabilities 39,689 39,097 Weighted-average lease term: Finance leases 7.60 years 8.34 years Operating leases 9.50 years 10.28 years Weighted-average discount rate: Finance leases 3.61 % 3.61 % Operating leases 3.72 % 3.67 % At September 30, 2024, future minimum rental commitments under finance and operating leases were as follows ($ in thousands): Finance Leases Operating Leases 2024 (excluding the nine months ended September 30, 2024) $ 145 $ 1,312 2025 584 5,292 2026 589 5,169 2027 594 5,202 2028 599 4,831 Thereafter 2,086 25,922 Total minimum lease payments 4,597 47,728 Less imputed interest ( 578 ) ( 8,039 ) Lease liabilities $ 4,019 $ 39,689

Deposits

Deposits	9 Months Ended
	Sep. 30, 2024
Deposits [Abstract]
Deposits	Note 8 – Deposits At September 30, 2024 and December 31, 2023, deposits consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Noninterest-bearing demand $ 3,142,792 $ 3,197,620 Interest-bearing demand 5,423,462 4,947,626 Savings 3,335,686 4,047,853 Time 3,338,995 3,376,664 Total $ 15,240,935 $ 15,569,763

Securities Sold Under Repurchas

Securities Sold Under Repurchase Agreements	9 Months Ended
	Sep. 30, 2024
Securities Sold under Agreements to Repurchase [Abstract]
Securities Sold Under Repurchase Agreements	Note 9 – Securities Sold Under Repurchase Agreements Trustmark utilizes securities sold under repurchase agreements as a source of borrowing in connection with overnight repurchase agreements offered to commercial deposit customers by using its unencumbered investment securities as collateral. Trustmark accounts for its securities sold under repurchase agreements as secured borrowings in accordance with FASB ASC Subtopic 860-30, “Transfers and Servicing – Secured Borrowing and Collateral.” Securities sold under repurchase agreements are stated at the amount of cash received in connection with the transaction. Trustmark monitors collateral levels on a continual basis and may be required to provide additional collateral based on the fair value of the underlying securities. Securities sold under repurchase agreements were secured by securities with a carrying amount of $ 37.9 million and $ 61.6 million at September 30, 2024 and December 31, 2023, respectively. Trustmark’s repurchase agreements are transacted under master repurchase agreements that give Trustmark, in the event of default by the counterparty, the right of offset with the same counterparty. At both September 30, 2024 and December 31, 2023 , all repurchase agreements were short-term and consisted primarily of sweep repurchase arrangements, under which excess deposits are “swept” into overnight repurchase agreements with Trustmark. The following table presents the securities sold under repurchase agreements by collateral pledged at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA $ 1,885 $ — Issued by FNMA and FHLMC 12,866 28,600 Other residential mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 7,960 526 Commercial mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 8,804 — Total securities sold under repurchase agreements $ 31,515 $ 29,126

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Note 10 – Revenue from Contracts with Customers Trustmark accounts for revenue from contracts with customers in accordance with FASB ASC Topic 606, “Revenue from Contracts with Customers,” which provides that revenue be recognized in a manner that depicts the transfer of goods or services to a customer in an amount that reflects the consideration Trustmark expects to be entitled to in exchange for those goods or services. Revenue from contracts with customers is recognized either over time in a manner that depicts Trustmark’s performance, or at a point in time when control of the goods or services are transferred to the customer. Trustmark’s noninterest income (loss), excluding all of mortgage banking, net and security gains (losses), net and portions of bank card and other fees and other income, are considered within the scope of FASB ASC Topic 606. Gains or losses on the sale of other real estate, which are included in Trustmark’s noninterest expense as other real estate expense, are also within the scope of FASB ASC Topic 606. Trustmark records a gain or loss from the sale of other real estate when control of the property transfers to the buyer. Trustmark records the gain or loss from the sale of other real estate in noninterest expense as other, net. Other real estate sales for the three and nine months ended September 30, 2024 resulted in a net loss of $ 92 thousand and $ 1.1 million, respectively, compared to a net loss of $ 47 thousand and $ 159 thousand for the three and nine months ended September 30, 2023, respectively. The Insurance Segment is included in discontinued operations for all periods presented in the accompanying consolidated balance sheets and the consolidated statements of income (loss). See Note 2 - Discontinued Operations for additional information about discontinued operations. The following tables present noninterest income (loss) disaggregated by reportable operating segment and revenue stream for the periods presented ($ in thousands): Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Segment Service charges on deposit accounts $ 11,250 $ — $ 11,250 $ 11,052 $ — $ 11,052 Bank card and other fees 7,661 218 7,879 7,332 873 8,205 Mortgage banking, net — 6,119 6,119 — 6,458 6,458 Wealth management 175 — 175 202 — 202 Other, net 3,136 ( 337 ) 2,799 2,843 ( 579 ) 2,264 Total noninterest income (loss) $ 22,222 $ 6,000 $ 28,222 $ 21,429 $ 6,752 $ 28,181 Wealth Management Segment Service charges on deposit accounts $ 22 $ — $ 22 $ 22 $ — $ 22 Bank card and other fees 52 — 52 12 — 12 Wealth management 9,113 — 9,113 8,571 — 8,571 Other, net 59 94 153 41 94 135 Total noninterest income $ 9,246 $ 94 $ 9,340 $ 8,646 $ 94 $ 8,740 Consolidated Service charges on deposit accounts $ 11,272 $ — $ 11,272 $ 11,074 $ — $ 11,074 Bank card and other fees 7,713 218 7,931 7,344 873 8,217 Mortgage banking, net — 6,119 6,119 — 6,458 6,458 Wealth management 9,288 — 9,288 8,773 — 8,773 Other, net 3,195 ( 243 ) 2,952 2,884 ( 485 ) 2,399 Total noninterest income (loss) $ 31,468 $ 6,094 $ 37,562 $ 30,075 $ 6,846 $ 36,921 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net. Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Segment Service charges on deposit accounts $ 33,089 $ — $ 33,089 $ 32,040 $ — $ 32,040 Bank card and other fees 23,281 1,176 24,457 23,011 1,890 24,901 Mortgage banking, net — 19,238 19,238 — 20,697 20,697 Wealth management 538 — 538 650 — 650 Other, net 13,735 ( 641 ) 13,094 8,763 ( 1,516 ) 7,247 Security gains (losses), net — ( 182,792 ) ( 182,792 ) — — — Total noninterest income (loss) $ 70,643 $ ( 163,019 ) $ ( 92,376 ) $ 64,464 $ 21,071 $ 85,535 Wealth Management Segment Service charges on deposit accounts $ 65 $ — $ 65 $ 65 $ — $ 65 Bank card and other fees 127 — 127 36 — 36 Wealth management 27,394 — 27,394 25,785 — 25,785 Other, net 139 282 421 122 285 407 Total noninterest income $ 27,725 $ 282 $ 28,007 $ 26,008 $ 285 $ 26,293 Consolidated Service charges on deposit accounts $ 33,154 $ — $ 33,154 $ 32,105 $ — $ 32,105 Bank card and other fees 23,408 1,176 24,584 23,047 1,890 24,937 Mortgage banking, net — 19,238 19,238 — 20,697 20,697 Wealth management 27,932 — 27,932 26,435 — 26,435 Other, net 13,874 ( 359 ) 13,515 8,885 ( 1,231 ) 7,654 Security gains (losses), net — ( 182,792 ) ( 182,792 ) — — — Total noninterest income (loss) $ 98,368 $ ( 162,737 ) $ ( 64,369 ) $ 90,472 $ 21,356 $ 111,828 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net.

Defined Benefit and Other Postr

Defined Benefit and Other Postretirement Benefits	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Defined Benefit and Other Postretirement Benefits	Note 11 – Defined Benefit and Other Postretirement Benefits Qualified Pension Plan Trustmark maintains a noncontributory tax-qualified defined benefit pension plan titled the Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions (the Continuing Plan) to satisfy commitments made by Trustmark to associates covered through plans obtained in acquisitions. The following table presents information regarding the net periodic benefit cost for the Continuing Plan for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 10 $ 13 $ 30 $ 39 Interest cost 62 73 185 219 Expected return on plan assets ( 24 ) ( 27 ) ( 72 ) ( 80 ) Recognized net (gain) loss due to lump sum settlements — — ( 13 ) 25 Net periodic benefit cost $ 48 $ 59 $ 130 $ 203 For the plan year ending December 31, 2024, Trustmark’s minimum required contribution to the Continuing Plan is $ 132 thousand; however, Management and the Board of Directors of Trustmark will monitor the Continuing Plan throughout 2024 to determine any additional funding requirements by the plan’s measurement date, which is December 31. Supplemental Retirement Plans Trustmark maintains a nonqualified supplemental retirement plan covering key executive officers and senior officers as well as directors who have elected to defer fees. The plan provides for retirement and/or death benefits based on a participant’s covered salary or deferred fees. Although plan benefits may be paid from Trustmark’s general assets, Trustmark has purchased life insurance contracts on the participants covered under the plan, which may be used to fund future benefit payments under the plan. The annual measurement date for the plan is December 31. As a result of mergers prior to 2014, Trustmark became the administrator of nonqualified supplemental retirement plans, for which the plan benefits were frozen prior to the merger date. The following table presents information regarding the net periodic benefit cost for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 11 $ 17 $ 33 $ 51 Interest cost 457 497 1,393 1,515 Amortization of prior service cost 28 28 83 83 Recognized net actuarial loss 84 70 263 216 Net periodic benefit cost $ 580 $ 612 $ 1,772 $ 1,865

Stock and Incentive Compensatio

Stock and Incentive Compensation	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Stock and Incentive Compensation	Note 12 – Stock and Incentive Compensation Trustmark has granted restricted stock units subject to the provisions of the Stock and Incentive Compensation Plan (the Stock Plan). Current outstanding and future grants of restricted stock units are subject to the provisions of the Stock Plan, which is designed to provide flexibility to Trustmark regarding its ability to motivate, attract and retain the services of key associates and directors. The Stock Plan also allows Trustmark to grant nonqualified stock options, incentive stock options, stock appreciation rights, restricted stock, restricted stock units and performance units to key associates and directors. Restricted Stock Grants Performance Units Trustmark’s performance units vest over three years and are granted to Trustmark’s executive and senior management teams. Performance units granted vest based on performance goals of return on average tangible equity and total shareholder return. Performance units are valued utilizing a Monte Carlo simulation model to estimate fair value of the units at the grant date. The Monte Carlo simulation was performed by an independent valuation consultant and requires the use of subjective modeling assumptions. These units are recognized using the straight-line method over the requisite service period. These units provide for achievement units if performance measures exceed 100 %. The restricted stock agreement for these units provides for dividend privileges, but no voting rights. Time-Based Units Trustmark’s time-based units granted to Trustmark’s executive and senior management teams vest over three years . Trustmark’s time-based units granted to members of Trustmark’s Board of Directors vest over one year . Time-based units are valued utilizing the fair value of Trustmark’s stock at the grant date. These units are recognized on the straight-line method over the requisite service period. The restricted stock agreement for these units provides for dividend privileges, but no voting rights. The following table summarizes the Stock Plan activity for the periods presented: Three Months Ended September 30, 2024 Performance Time-Vested Nonvested units, beginning of period 208,045 376,022 Granted — 1,500 Released from restriction — ( 900 ) Forfeited — ( 2,149 ) Nonvested units, end of period 208,045 374,473 Nine Months Ended September 30, 2024 Performance Time-Vested Nonvested units, beginning of period 174,214 358,252 Granted 89,928 161,646 Released from restriction ( 54,973 ) ( 134,166 ) Forfeited ( 1,124 ) ( 11,259 ) Nonvested units, end of period 208,045 374,473 The following table presents information regarding compensation expense for units under the Stock Plan for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Performance units $ 522 $ 449 $ 1,506 $ 1,181 Time-vested units 808 1,045 3,440 3,591 Total compensation expense $ 1,330 $ 1,494 $ 4,946 $ 4,772

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Note 13 – Contingencies Lending Related Trustmark makes commitments to extend credit and issues standby and commercial letters of credit (letters of credit) in the normal course of business in order to fulfill the financing needs of its customers. The carrying amount of commitments to extend credit and letters of credit approximates the fair value of such financial instruments. Commitments to extend credit are agreements to lend money to customers pursuant to certain specified conditions. Commitments generally have fixed expiration dates or other termination clauses. Because many of these commitments are expected to expire without being fully drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The exposure to credit loss in the event of nonperformance by the other party to the commitments to extend credit is represented by the contract amount of those instruments. Trustmark applies the same credit policies and standards as it does in the lending process when making these commitments. The collateral obtained is based upon the nature of the transaction and the assessed creditworthiness of the borrower. At September 30, 2024 and 2023 , Trustmark had unused commitments to extend credit of $ 4.469 billion and $ 5.030 billion, respectively. Letters of credit are conditional commitments issued by Trustmark to insure the performance of a customer to a third-party. A financial standby letter of credit irrevocably obligates Trustmark to pay a third-party beneficiary when a customer fails to repay an outstanding loan or debt instrument. A performance standby letter of credit irrevocably obligates Trustmark to pay a third-party beneficiary when a customer fails to perform some contractual, nonfinancial obligation. When issuing letters of credit, Trustmark uses the same policies regarding credit risk and collateral, which are followed in the lending process. At September 30, 2024 and 2023, Trustmark’s maximum exposure to credit loss in the event of nonperformance by the customer for letters of credit was $ 127.5 million and $ 127.8 million, respectively. These amounts consist primarily of commitments with maturities of less than three years , which have an immaterial carrying value. Trustmark holds collateral to support standby letters of credit when deemed necessary. As of September 30, 2024 and 2023 , the fair value of collateral held was $ 27.9 million and $ 32.0 million, respectively. ACL on Off-Balance Sheet Credit Exposures Trustmark maintains a separate ACL on off-balance sheet credit exposures, including unfunded loan commitments and letters of credit, which is included on the accompanying consolidated balance sheet as of September 30, 2024 and December 31, 2023. During the first quarter of 2024, Management decided to implement a performance trends qualitative factor for unfunded commitments. The same assumptions are applied in this calculation that the funded balances utilize with the addition of using the funding rates on the unfunded commitments. The performance trends qualitative factor reserve is then added to the other calculated reserve to get a total reserve for off-balance sheet credit exposures. During the third quarter of 2024, Management implemented the External Factor – Credit Quality Review qualitative factor for unfunded commitments. The same assumptions are applied in this calculation that the funded balances utilize with the addition of using the funding rates on the unfunded commitments. The Credit Quality Review qualitative factor reserve is then added to the other calculated reserve to get a total reserve for off-balance sheet credit exposures. Changes in the ACL on off-balance sheet credit exposures were as follows for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Balance at beginning of period $ 30,265 $ 34,841 $ 34,057 $ 36,838 PCL, off-balance sheet credit exposures ( 1,375 ) 104 ( 5,167 ) ( 1,893 ) Balance at end of period $ 28,890 $ 34,945 $ 28,890 $ 34,945 Adjustments to the ACL on off-balance sheet credit exposures are recorded to PCL, off-balance sheet credit exposures. The decrease in the ACL on off-balance sheet credit exposures for the three months ended September 30, 2024 was primarily due to the decrease in required reserves as a result of a decrease in unfunded commitments coupled with the decrease in the quantitative reserve rates due to changes in the macroeconomic factors. The decreases were partially offset by an increase in required reserves as a result of implementing the External Factor - Credit Quality Review qualitative factor. The decrease in the ACL on off-balance sheet credit exposures for the nine months ended September 30, 2024 was primarily due to the decrease in required reserves as a result of a decrease in unfunded commitments partially offset by an increase in required reserves as a result of implementing the performance trend and External Factor - Credit Quality Review qualitative factors. The increase in the ACL on off-balance sheet credit exposures for the three months ended September 30, 2023 was primarily due to the weakening macroeconomic forecasts as well as the net adjustment to the qualitative factors. The decrease in the ACL on off-balance sheet credit exposures for the nine months ended September 30, 2023 was primarily due to decreases in unfunded balances for the construction, land development and other land portfolio and other construction loan portfolio. No credit loss estimate is reported for off-balance sheet credit exposures that are unconditionally cancellable by Trustmark or for undrawn amounts under such arrangements that may be drawn prior to the cancellation of the arrangement. Legal Proceedings TNB and its subsidiaries are parties to lawsuits and other claims that arise in the ordinary course of business. Some of the lawsuits assert claims related to the lending, collection, servicing, investment, trust and other business activities, and some of the lawsuits allege substantial claims for damages. In accordance with FASB ASC Subtopic 450-20, “Loss Contingencies,” TNB will establish an accrued liability for any litigation matter if and when such matter presents loss contingencies that are both probable and reasonably estimable. At the present time, TNB believes, based on its evaluation and the advice of legal counsel, that a loss in any currently pending legal proceeding is not probable and a reasonable estimate cannot reasonably be made.

Earnings Per Share (EPS)

Earnings Per Share (EPS)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share (EPS)	Note 14 – Earnings Per Share (EPS) The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Basic shares 61,207 61,070 61,177 61,048 Dilutive shares 241 193 216 171 Diluted shares 61,448 61,263 61,393 61,219 Weighted-average antidilutive stock awards are excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Weighted-average antidilutive stock awards — 23 — 75

Statements of Cash Flows

Statements of Cash Flows	9 Months Ended
	Sep. 30, 2024
Supplemental Cash Flow Information [Abstract]
Statements of Cash Flows	Note 15 – Statements of Cash Flows The following table reflects specific transaction amounts for the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Income taxes paid $ 19,887 $ 34,898 Interest expense paid on deposits and borrowings 296,939 214,745 Noncash transfers from loans to other real estate 4,703 5,434 Operating right-of-use assets resulting from lease liabilities 1,831 7,092

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2024
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Note 16 – Shareholders’ Equity Regulatory Capital Trustmark and TNB are subject to minimum risk-based capital and leverage capital requirements, as described in the section captioned “Capital Adequacy” included in Part I. Item 1. – Business of Trustmark’s 2023 Annual Report, which are administered by the federal bank regulatory agencies. These capital requirements, as defined by federal regulations, involve quantitative and qualitative measures of assets, liabilities and certain off-balance sheet instruments. Trustmark’s and TNB’s minimum risk-based capital requirements include a capital conservation buffer of 2.50 %. Accumulated other comprehensive income (loss), net of tax, is not included in computing regulatory capital. Trustmark elected the five-year phase-in transition period (through December 31, 2024) related to adopting FASB ASU 2016-13 for regulatory capital purposes. Failure to meet minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the financial statements of Trustmark and TNB and limit Trustmark’s and TNB’s ability to pay dividends. As of September 30, 2024, Trustmark and TNB exceeded all applicable minimum capital standards. In addition, Trustmark and TNB met applicable regulatory guidelines to be considered well-capitalized at September 30, 2024. To be categorized in this manner, Trustmark and TNB maintained, as applicable, minimum common equity Tier 1 risk-based capital, Tier 1 risk-based capital, total risk-based capital and Tier 1 leverage ratios as set forth in the accompanying table, and were not subject to any written agreement, order or capital directive, or prompt corrective action directive issued by their primary federal regulators to meet and maintain a specific capital level for any capital measures. There are no significant conditions or events that have occurred since September 30, 2024, which Management believes have affected Trustmark’s or TNB’s present classification. The following table provides Trustmark’s and TNB’s actual regulatory capital amounts and ratios under regulatory capital standards in effect at September 30, 2024 and December 31, 2023 ($ in thousands): Actual Regulatory Capital Minimum To Be Well Amount Ratio Requirement Capitalized At September 30, 2024: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,694,769 11.30 % 7.00 % n/a Trustmark National Bank 1,800,019 12.00 % 7.00 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,754,769 11.70 % 8.50 % n/a Trustmark National Bank 1,800,019 12.00 % 8.50 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 2,057,073 13.71 % 10.50 % n/a Trustmark National Bank 1,978,676 13.19 % 10.50 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,754,769 9.65 % 4.00 % n/a Trustmark National Bank 1,800,019 9.90 % 4.00 % 5.00 % At December 31, 2023: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,521,665 10.04 % 7.00 % n/a Trustmark National Bank 1,602,327 10.58 % 7.00 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,581,665 10.44 % 8.50 % n/a Trustmark National Bank 1,602,327 10.58 % 8.50 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,862,246 12.29 % 10.50 % n/a Trustmark National Bank 1,759,426 11.61 % 10.50 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,581,665 8.62 % 4.00 % n/a Trustmark National Bank 1,602,327 8.75 % 4.00 % 5.00 % Stock Repurchase Program On December 6, 2022, Trustmark’s Board of Directors authorized a stock repurchase program effective January 1, 2023, under which $ 50.0 million of Trustmark’s outstanding shares could be acquired through December 31, 2023. No shares were repurchased under this stock repurchase program. On December 5, 2023, Trustmark’s Board of Directors authorized a stock repurchase program effective January 1, 2024, under which $ 50.0 million of Trustmark’s outstanding shares may be acquired through December 31, 2024. The repurchase program, which is subject to market conditions and management discretion, will be implemented through open market repurchases or privately negotiated transaction s. During the first nine months of 2024, Trustmark did not repurchase any shares under this stock repurchase program. Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) The following table presents the net change in the components of accumulated other comprehensive income (loss) and the related tax effects allocated to each component for the periods presented ($ in thousands). The amortization of prior service cost, recognized net loss due to lump sum settlements and change in net actuarial loss are included in the computation of net periodic benefit cost (see Note 10 – Defined Benefit and Other Postretirement Benefits for additional details). Reclassification adjustments related to pension and other postretirement benefit plans are included in salaries and employee benefits and other expense in the accompanying consolidated statements of income (loss). Reclassification adjustments related to the cash flow hedge derivatives are included in interest and fees on LHFS and LHFI in the accompanying consolidated statements of income (loss). Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 Before Tax Tax (Expense) Net of Tax Before Tax Tax (Expense) Net of Tax Securities available for sale and transferred Net unrealized holding gains (losses) arising $ 55,892 $ ( 13,973 ) $ 41,919 $ ( 26,963 ) $ 6,740 $ ( 20,223 ) Reclassification adjustment for net (gains) losses — — — — — — Change in net unrealized holding loss on 3,688 ( 922 ) 2,766 4,000 ( 1,000 ) 3,000 Total securities available for sale 59,580 ( 14,895 ) 44,685 ( 22,963 ) 5,740 ( 17,223 ) Pension and other postretirement benefit plans: Reclassification adjustments for changes Net change in prior service costs 28 ( 7 ) 21 28 ( 7 ) 21 Recognized net loss due to lump sum — — — — — — Change in net actuarial loss 84 ( 21 ) 63 70 ( 18 ) 52 Total pension and other postretirement 112 ( 28 ) 84 98 ( 25 ) 73 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective 18,826 ( 4,706 ) 14,120 ( 11,338 ) 2,834 ( 8,504 ) Reclassification adjustment for (gain) loss 4,831 ( 1,208 ) 3,623 4,627 ( 1,157 ) 3,470 Total cash flow hedge derivatives 23,657 ( 5,914 ) 17,743 ( 6,711 ) 1,677 ( 5,034 ) Total other comprehensive income (loss) $ 83,349 $ ( 20,837 ) $ 62,512 $ ( 29,576 ) $ 7,392 $ ( 22,184 ) Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 Before Tax Tax (Expense) Net of Tax Before Tax Tax (Expense) Net of Tax Securities available for sale and transferred Net unrealized holding gains (losses) arising $ 47,579 $ ( 11,895 ) $ 35,684 $ ( 16,062 ) $ 4,246 $ ( 11,816 ) Reclassification adjustment for net (gains) losses 182,792 ( 45,698 ) 137,094 — — — Change in net unrealized holding loss on 11,020 ( 2,755 ) 8,265 11,799 ( 2,950 ) 8,849 Total securities available for sale 241,391 ( 60,348 ) 181,043 ( 4,263 ) 1,296 ( 2,967 ) Pension and other postretirement benefit plans: Reclassification adjustments for changes Net change in prior service costs 83 ( 21 ) 62 83 ( 21 ) 62 Recognized net loss due to lump sum ( 13 ) 3 ( 10 ) 25 ( 6 ) 19 Change in net actuarial loss 263 ( 65 ) 198 216 ( 54 ) 162 Total pension and other postretirement 333 ( 83 ) 250 324 ( 81 ) 243 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective ( 2,007 ) 502 ( 1,505 ) ( 24,569 ) 6,142 ( 18,427 ) Reclassification adjustment for (gain) loss 14,520 ( 3,630 ) 10,890 11,555 ( 2,889 ) 8,666 Total cash flow hedge derivatives 12,513 ( 3,128 ) 9,385 ( 13,014 ) 3,253 ( 9,761 ) Total other comprehensive income (loss) $ 254,237 $ ( 63,559 ) $ 190,678 $ ( 16,953 ) $ 4,468 $ ( 12,485 ) The following table presents the changes in the balances of each component of accumulated other comprehensive income (loss) for the periods presented ($ in thousands). All amounts are presented net of tax. Securities for Sale Defined Cash Flow Total Balance at January 1, 2024 $ ( 204,670 ) $ ( 6,075 ) $ ( 8,978 ) $ ( 219,723 ) Other comprehensive income (loss) before reclassification 43,949 — ( 1,505 ) 42,444 Amounts reclassified from accumulated other 137,094 250 10,890 148,234 Net other comprehensive income (loss) 181,043 250 9,385 190,678 Balance at September 30, 2024 $ ( 23,627 ) $ ( 5,825 ) $ 407 $ ( 29,045 ) Balance at January 1, 2023 $ ( 254,442 ) $ ( 5,792 ) $ ( 15,169 ) $ ( 275,403 ) Other comprehensive income (loss) before reclassification ( 2,967 ) — ( 18,427 ) ( 21,394 ) Amounts reclassified from accumulated other — 243 8,666 8,909 Net other comprehensive income (loss) ( 2,967 ) 243 ( 9,761 ) ( 12,485 ) Balance at September 30, 2023 $ ( 257,409 ) $ ( 5,549 ) $ ( 24,930 ) $ ( 287,888 )

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value	Note 17 – Fair Value Financial Instruments Measured at Fair Value The methodologies Trustmark uses in determining the fair values are based primarily on the use of independent, market-based data to reflect a value that would be reasonably expected upon exchange of the position in an orderly transaction between market participants at the measurement date. The predominant portion of assets that are stated at fair value are of a nature that can be valued using prices or inputs that are readily observable through a variety of independent data providers. The providers selected by Trustmark for fair valuation data are widely recognized and accepted vendors whose evaluations support the pricing functions of financial institutions, investment and mutual funds, and portfolio managers. Trustmark has documented and evaluated the pricing methodologies used by the vendors and maintains internal processes that regularly test valuations for anomalies. Trustmark utilizes an independent pricing service to advise it on the carrying value of the securities available for sale portfolio. As part of Trustmark’s procedures, the price provided from the service is evaluated for reasonableness given market changes. When a questionable price exists, Trustmark investigates further to determine if the price is valid. If needed, other market participants may be utilized to determine the correct fair value. Trustmark has also reviewed and confirmed its determinations in thorough discussions with the pricing source regarding their methods of price discovery. Mortgage loan commitments are valued based on the securities prices of similar collateral, term, rate and delivery for which the loan is eligible to deliver in place of the particular security. Trustmark acquires a broad array of mortgage security prices that are supplied by a market data vendor, which in turn accumulates prices from a broad list of securities dealers. Prices are processed through a mortgage pipeline management system that accumulates and segregates all loan commitment and forward-sale transactions according to the similarity of various characteristics (maturity, term, rate, and collateral). Prices are matched to those positions that are deemed to be an eligible substitute or offset ( i.e ., “deliverable”) for a corresponding security observed in the marketplace. Trustmark estimates the fair value of the MSR through the use of prevailing market participant assumptions and market participant valuation processes. This valuation is periodically tested and validated against other third-party firm valuations. Trustmark obtains the fair value of interest rate swaps from a third-party pricing service that uses an industry standard discounted cash flow methodology. In addition, credit valuation adjustments are incorporated in the fair values to account for potential nonperformance risk. In adjusting the fair value of its interest rate swap contracts for the effect of nonperformance risk, Trustmark has considered any applicable credit enhancements such as collateral postings, thresholds, mutual puts, and guarantees. In conjunction with the FASB’s fair value measurement guidance, Trustmark made an accounting policy election to measure the credit risk of these derivative financial instruments, which are subject to master netting agreements, on a net basis by counterparty portfolio. Trustmark has determined that the majority of the inputs used to value its interest rate swaps offered to qualified commercial borrowers fall within Level 2 of the fair value hierarchy, while the credit valuation adjustments associated with these derivatives utilize Level 3 inputs, such as estimates of current credit spreads. Trustmark has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its interest rate swaps and has determined that the credit valuation adjustment is not significant to the overall valuation of these derivatives. As a result, Trustmark classifies its interest rate swap valuations in Level 2 of the fair value hierarchy. Trustmark also utilizes exchange-traded derivative instruments such as Treasury note futures contracts and option contracts to achieve a fair value return that offsets the changes in fair value of the MSR attributable to interest rates. Fair values of these derivative instruments are determined from quoted prices in active markets for identical assets therefore allowing them to be classified within Level 1 of the fair value hierarchy. In addition, Trustmark utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area which lack observable inputs for valuation purposes resulting in their inclusion in Level 3 of the fair value hierarchy. At this time, Trustmark presents no fair values that are derived through internal modeling. Should positions requiring fair valuation arise that are not relevant to existing methodologies, Trustmark will make every reasonable effort to obtain market participant assumptions, or independent evaluation. Financial Assets and Liabilities The following tables summarize financial assets and financial liabilities measured at fair value on a recurring basis at September 30, 2024 and December 31, 2023, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value ($ in thousands). There were no transfers between fair value levels for the nine months ended September 30, 2024 and the year ended December 31, 2023. September 30, 2024 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 202,638 $ 202,638 $ — $ — U.S. Government agency obligations 19,335 — 19,335 — Mortgage-backed securities 1,503,822 — 1,503,822 — Securities available for sale 1,725,795 202,638 1,523,157 — LHFS 216,454 — 216,454 — MSR 125,853 — — 125,853 Other assets 20,502 302 19,496 704 Other liabilities 28,306 336 27,970 — December 31, 2023 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 372,368 $ 372,368 $ — $ — U.S. Government agency obligations 5,792 — 5,792 — Mortgage-backed securities 1,384,718 — 1,384,718 — Securities available for sale 1,762,878 372,368 1,390,510 — LHFS 184,812 — 184,812 — MSR 131,870 — — 131,870 Other assets - derivatives 23,316 7,685 14,786 845 Other liabilities - derivatives 35,600 21 35,579 — The changes in Level 3 assets measured at fair value on a recurring basis for the nine months ended September 30, 2024 and 2023 are summarized as follows ($ in thousands): MSR Other Assets - Balance, January 1, 2024 $ 131,870 $ 845 Total net (loss) gain included in Mortgage banking, net (1) ( 15,436 ) 2,154 Additions 9,419 — Sales — ( 2,295 ) Balance, September 30, 2024 $ 125,853 $ 704 The amount of total gains (losses) for the period included in earnings $ ( 6,908 ) $ 1,580 Balance, January 1, 2023 $ 129,677 $ 157 Total net (loss) gain included in Mortgage banking, net (1) 1,677 1,672 Additions 11,025 — Sales — ( 1,632 ) Balance, September 30, 2023 $ 142,379 $ 197 The amount of total gains (losses) for the period included in $ 8,734 $ 559 (1) Total net (loss) gain included in Mortgage banking, net relating to the MSR includes changes in fair value due to market changes and due to run-off. Trustmark may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. Assets at September 30, 2024, which have been measured at fair value on a nonrecurring basis, include collateral-dependent LHFI. A loan is collateral dependent when the borrower is experiencing financial difficulty and repayment of the loan is expected to be provided substantially through the sale of the collateral. The expected credit loss for collateral-dependent loans is measured as the difference between the amortized cost basis of the loan and the fair value of the collateral, adjusted for the estimated cost to sell. Fair value estimates for collateral-dependent loans are derived from appraised values based on the current market value or as is value of the collateral, normally from recently received and reviewed appraisals. Current appraisals are ordered on an annual basis based on the inspection date or more often if market conditions necessitate. Appraisals are obtained from state-certified appraisers and are based on certain assumptions, which may include construction or development status and the highest and best use of the property. These appraisals are reviewed by Trustmark’s Appraisal Review Department to ensure they are acceptable, and values are adjusted down for costs associated with asset disposal. At September 30, 2024 , Trustmark had outstanding balances of $ 45.5 million with a related ACL of $ 17.3 million in collateral-dependent LHFI, compared to outstanding balances of $ 49.1 million with a related ACL of $ 12.4 million in collateral-dependent LHFI at December 31, 2023. The collateral-dependent LHFI are classified as Level 3 in the fair value hierarchy. Nonfinancial Assets and Liabilities Certain nonfinancial assets measured at fair value on a nonrecurring basis include foreclosed assets (upon initial recognition or subsequent impairment), nonfinancial assets and nonfinancial liabilities measured at fair value in the second step of a goodwill impairment test, and intangible assets and other nonfinancial long-lived assets measured at fair value for impairment assessment. Other real estate includes assets that have been acquired in satisfaction of debt through foreclosure and is recorded at the fair value less cost to sell (estimated fair value) at the time of foreclosure. Fair value is based on independent appraisals and other relevant factors. In the determination of fair value subsequent to foreclosure, Management also considers other factors or recent developments, such as changes in market conditions from the time of valuation and anticipated sales values considering plans for disposition, which could result in an adjustment to lower the collateral value estimates indicated in the appraisals. Periodic revaluations are classified as Level 3 in the fair value hierarchy since assumptions are used that may not be observable in the market. Foreclosed assets of $ 803 thousand were remeasured during the first nine months of 2024 , requiring write-downs of $ 130 thousand to reach their current fair values compared to $ 765 thousand of foreclosed assets that were remeasured during the first nine months of 2023 , requiring write-downs of $ 205 thousand. Fair Value of Financial Instruments FASB ASC Topic 825, “Financial Instruments,” requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The carrying amounts and estimated fair values of financial instruments at September 30, 2024 and December 31, 2023, are as follows ($ in thousands): September 30, 2024 December 31, 2023 Carrying Estimated Carrying Estimated Financial Assets: Level 2 Inputs: Cash and short-term investments $ 815,436 $ 815,436 $ 975,343 $ 975,343 Securities held to maturity 1,358,358 1,316,167 1,426,279 1,355,504 Level 3 Inputs: Net LHFI 12,942,182 13,025,566 12,811,157 12,762,505 Financial Liabilities: Level 2 Inputs: Deposits 15,240,935 15,234,983 15,569,763 15,553,417 Federal funds purchased and securities sold under 365,643 365,643 405,745 405,745 Other borrowings 443,458 443,458 483,230 483,226 Subordinated notes 123,647 119,063 123,482 108,125 Junior subordinated debt securities 61,856 48,248 61,856 48,856 Fair Value Option Trustmark has elected to account for its mortgage LHFS under the fair value option, with interest income on these mortgage LHFS reported in interest and fees on LHFS and LHFI. The fair value of the mortgage LHFS is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan. The mortgage LHFS are actively managed and monitored and certain market risks of the loans may be mitigated through the use of derivatives. These derivative instruments are carried at fair value with changes in fair value recorded as noninterest income (loss) in mortgage banking, net. The changes in the fair value of LHFS are largely offset by changes in the fair value of the derivative instruments. For the three and nine months ended September 30, 2024 , a net gain of $ 480 thousand and a net loss of $ 1.2 million, respectively, were recorded as noninterest income (loss) in mortgage banking, net for changes in the fair value of LHFS accounted for under the fair value option, compared to net losses of $ 602 thousand and $ 841 thousand for the three and nine months ended September 30, 2023, respectively. Interest and fees on LHFS and LHFI for the three and nine months ended September 30, 2024 included $ 2.4 million and $ 6.3 million, respectively, of interest earned on LHFS accounted for under the fair value option, compared to $ 2.3 million and $ 5.9 million for the three and nine months ended September 30, 2023 , respectively. Election of the fair value option allows Trustmark to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at the lower of cost or fair value and the derivatives at fair value. The fair value option election does not apply to GNMA optional repurchase loans which do not meet the requirements under FASB ASC Topic 825 to be accounted for under the fair value option. GNMA optional repurchase loans totaled $ 89.4 million and $ 78.8 million at September 30, 2024 and December 31, 2023, respectively, and are included in LHFS on the accompanying consolidated balance sheets. For additional information regarding GNMA optional repurchase loans, please see the section captioned “Past Due LHFS” included in Note 3 – LHFI and ACL, LHFI. The following table provides information about the fair value and the contractual principal outstanding of LHFS accounted for under the fair value option at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Fair value of LHFS $ 127,015 $ 105,974 LHFS contractual principal outstanding 125,041 102,994 Fair value less unpaid principal $ 1,974 $ 2,980

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 18 – Derivative Financial Instruments Derivatives Designated as Hedging Instruments Trustmark engages in a cash flow hedging program to add stability to interest income and to manage its exposure to interest rate movements. Interest rate swaps designated as cash flow hedges involve the receipt of fixed-rate amounts from a counterparty in exchange for Trustmark making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate floor spreads designated as cash flow hedges involve the receipt of variable-rate amounts if interest rates fall below the purchased floor strike rate on the contract and payments of variable-rate amounts if interest rates fall below the sold floor strike rate on the contract. Trustmark uses such derivatives to hedge the variable cash flows associated with existing and anticipated variable-rate loan assets. At September 30, 2024 , the aggregate notional value of Trustmark's interest rate swaps and floor spreads designated as cash flow hedges totaled $ 1.390 billion compared to $ 1.125 billion at December 31, 2023. Trustmark records any gains or losses on these cash flow hedges in accumulated other comprehensive income (loss). Gains and losses on derivatives representing hedge components excluded from the assessment of effectiveness are recognized over the life of the hedge on a systematic and rational basis, as documented at hedge inception in accordance with Trustmark’s accounting policy election. The earnings recognition of excluded components included in interest and fees on LHFS and LHFI totaled $ 132 thousand and $ 341 thousand of amortization expense for the three and nine months ended September 30, 2024, respectively, compared to $ 13 thousand and $ 35 thousand of amortization expense for the three and nine months ended September 30, 2023, respectively. As interest payments are received on Trustmark's variable-rate a ssets, amounts reported in accumulated other comprehensive income (loss) are reclassified into interest and fees on LHFS and LHFI in the accompanying consolidated statements of income (loss) during the same period. During the next twelve months, Trustmark estimates that $ 5.8 million will be reclassified as a reduction to interest and fees on LHFS and LHFI. This amount could differ due to changes in interest rates, hedge de-designations or the addition of other hedges. Derivatives not Designated as Hedging Instruments Trustmark utilizes a portfolio of exchange-traded derivative instruments, such as Treasury note futures contracts and option contracts, to achieve a fair value return that economically hedges changes in the fair value of the MSR attributable to interest rates. These transactions are considered freestanding derivatives that do not otherwise qualify for hedge accounting. The total notional amount of these derivative instruments was $ 296.5 million at September 30, 2024 compared to $ 285.0 million at December 31, 2023. Changes in the fair value of these exchange-traded derivative instruments are recorded as noninterest income (loss) in mortgage banking, net and are offset by changes in the fair value of the MSR. The impact of this strategy resulted in a net negative ineffectiveness of $ 2.5 million and $ 1.0 million for the three months ended September 30, 2024 and 2023, respectively. For the nine months ended September 30, 2024 and 2023, the impact was a net negative ineffectiveness of $ 8.1 million and $ 4.1 million, respectively. As part of Trustmark’s risk management strategy in the mortgage banking area, derivative instruments such as forward sales contracts are utilized. Trustmark’s obligations under forward sales contracts consist of commitments to deliver mortgage loans, originated and/or purchased, in the secondary market at a future date. Changes in the fair value of these derivative instruments are recorded as noninterest income (loss) in mortgage banking, net and are offset by changes in the fair value of LHFS. Trustmark’s off-balance sheet obligations under these derivative instruments totaled $ 116.5 million at September 30, 2024 , with a negative valuation adjustment of $ 144 thousand, compared to $ 109.5 million, with a negative valuation adjustment of $ 994 thousand, at December 31, 2023. Trustmark also utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area. Interest rate lock commitments are residential mortgage loan commitments with customers, which guarantee a specified interest rate for a specified time period. Changes in the fair value of these derivative instruments are recorded as noninterest income (loss) in mortgage banking, net and are offset by the changes in the fair value of forward sales contracts. Trustmark’s off-balance sheet obligations under these derivative instruments totaled $ 81.0 million at September 30, 2024 , with a positive valuation adjustment of $ 704 thousand, compared to $ 61.9 million, with a positive valuation adjustment of $ 845 thousand, at December 31, 2023. Trustmark offers certain derivatives products directly to qualified commercial lending clients seeking to manage their interest rate risk. Trustmark economically hedges interest rate swap transactions executed with commercial lending clients by entering into offsetting interest rate swap transactions with institutional derivatives market participants. Derivatives transactions executed as part of this program are not designated as qualifying hedging relationships and are, therefore, carried at fair value with the change in fair value recorded as noninterest income (loss) in bank card and other fees. Because these derivatives have mirror-image contractual terms, in addition to collateral provisions which mitigate the impact of non-performance risk, the changes in fair value are expected to substantially offset. The offsetting interest rate swap transactions are either cleared through the Chicago Mercantile Exchange for clearable transactions or booked directly with institutional derivatives market participants for non-clearable transactions. The Chicago Mercantile Exchange rules legally characterize variation margin collateral payments made or received for centrally cleared interest rate swaps as settlements rather than collateral. As a result, centrally cleared interest rate swaps included in other assets and other liabilities are presented on a net basis in the accompanying consolidated balance sheets. At September 30, 2024 , Trustmark had interest rate swaps with an aggregate notional amount of $ 1.721 billion related to this program, compared to $ 1.500 billion at December 31, 2023. Credit-risk-related Contingent Features Trustmark has agreements with its financial institution counterparties that contain provisions where if Trustmark defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then Trustmark could also be declared in default on its derivatives obligations. At September 30, 2024, the termination value of i nterest rate swaps in a liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements totaled $ 2.0 million compared to $ 1.4 million at December 31, 2023. At September 30, 2024 and December 31, 2023 , Trustmark had posted collateral of $ 2.9 million and $ 2.0 million, respectively, against its obligations because of negotiated thresholds and minimum transfer amounts under these agreements. If Trustmark had breached any of these triggering provisions at September 30, 2024, it could have been required to settle its obligations under the agreements at the termination value. Credit risk participation agreements arise when Trustmark contracts with other financial institutions, as a guarantor or beneficiary, to share credit risk associated with certain interest rate swaps. These agreements provide for reimbursement of losses resulting from a third-party default on the underlying swap. At September 30, 2024 , Trustmark had entered into nine risk p articipation agreements as a beneficiary with aggregate notional amounts of $ 60.3 million compared to six risk participation agreements as a beneficiary with an aggregate notional amount of $ 40.1 million at December 31, 2023. At September 30, 2024 , Trustmark had entered into thirty-six risk participation agreements as a guarantor with aggregate notional amounts of $ 286.2 million compared to thirty-five risk participation agreements as a guarantor with aggregate notional amounts of $ 304.7 million at December 31, 2023. The aggregate fair values of these risk participation agreements were immaterial at both September 30, 2024 and December 31, 2023. Tabular Disclosures The following tables disclose the fair value of derivative instruments in Trustmark’s consolidated balance sheets at September 30, 2024 and December 31, 2023 as well as the effect of these derivative instruments on Trustmark’s results of operations for the periods presented ($ in thousands): September 30, 2024 December 31, 2023 Derivatives in hedging relationships: Interest rate contracts: Interest rate swaps included in other assets (1) $ 3,766 $ 1,182 Interest rate floors included in other assets 3,181 1,689 Interest rate swaps included in other liabilities (1) 50 267 Derivatives not designated as hedging instruments: Interest rate contracts: Exchange traded purchased options included in other assets $ 33 $ 180 OTC written options (rate locks) included in other assets 704 845 Futures contracts included in other assets 269 7,505 Interest rate swaps included in other assets (1) 12,536 11,910 Credit risk participation agreements included in other assets 13 5 Futures contracts included in other liabilities 16 — Forward contracts included in other liabilities 144 994 Exchange traded written options included in other liabilities 320 21 Interest rate swaps included in other liabilities (1) 27,685 34,255 Credit risk participation agreements included in other liabilities 91 63 (1) In accordance with GAAP, the variation margin collateral payments made or received for interest rate swaps that are centrally cleared are legally characterized as settled. As a result, the centrally cleared interest rate swaps included in other assets and other liabilities are presented on a net basis in the accompanying consolidated balance sheets. Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Derivatives in hedging relationships: Amount of gain (loss) reclassified from accumulated other $ ( 4,831 ) $ ( 4,627 ) $ ( 14,520 ) $ ( 11,555 ) Derivatives not designated as hedging instruments: Amount of gain (loss) recognized in mortgage banking, net $ 7,655 $ ( 7,634 ) $ ( 478 ) $ ( 11,526 ) Amount of gain (loss) recognized in bank card and other fees ( 93 ) 381 ( 98 ) 571 The following table discloses the amount included in other comprehensive income (loss), net of tax, for derivative instruments designated as cash flow hedges for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Derivatives in cash flow hedging relationship Amount of gain (loss) recognized in other comprehensive $ 14,120 $ ( 8,504 ) $ ( 1,505 ) $ ( 18,427 ) Trustmark’s interest rate swap derivative instruments are subject to master netting agreements, and therefore, eligible for offsetting in the consolidated balance sheets. Trustmark has elected to not offset any derivative instruments in its consolidated balance sheets. Information about financial instruments that are eligible for offset in the consolidated balance sheets as of September 30, 2024 and December 31, 2023 is presented in the following tables ($ in thousands): Offsetting of Derivative Assets As of September 30, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 19,483 $ — $ 19,483 $ ( 7,121 ) $ — $ 12,362 Offsetting of Derivative Liabilities As of September 30, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 27,735 $ — $ 27,735 $ ( 7,121 ) $ ( 2,850 ) $ 17,764 Offsetting of Derivative Assets As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 14,781 $ — $ 14,781 $ ( 4,339 ) $ — $ 10,442 Offsetting of Derivative Liabilities As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 34,522 $ — $ 34,522 $ ( 4,339 ) $ ( 2,040 ) $ 28,143

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Segment Information	Note 19 – Segment Information Trustmark’s management reporting structure includes two segments: General Banking and Wealth Management. For a complete overview of Trustmark’s operating segments, see Note 20 – Segment Information included in Part II. Item 8. – Financial Statements and Supplementary Data, of Trustmark’s 2023 Annual Report. The Insurance Segment is included in discontinued operations for all periods presented in the accompanying consolidated balance sheets and the consolidated statements of income (loss). See Note 2 - Discontinued Operations for additional information about discontinued operations. The accounting policies of each reportable segment are the same as those of Trustmark except for its internal allocations. Noninterest expenses for back-office operations support are allocated to segments based on estimated uses of those services. Trustmark measures the net interest income of its business segments with a process that assigns cost of funds or earnings credit on a matched-term basis. This process, called “funds transfer pricing”, charges an appropriate cost of funds to assets held by a business unit, or credits the business unit for potential earnings for carrying liabilities. The net of these charges and credits flows through to the General Banking Segment, which contains the management team responsible for determining TNB’s funding and interest rate risk strategies. The following table discloses financial information by reportable segment for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 General Banking Net interest income $ 153,189 $ 137,143 $ 424,236 $ 411,674 Provision for credit losses 6,551 10,646 33,631 20,015 Noninterest income (loss) 28,222 28,181 ( 92,376 ) 85,535 Noninterest expense 115,157 122,010 336,835 345,225 Income (loss) before income taxes 59,703 32,668 ( 38,606 ) 131,969 Income taxes 10,445 5,245 ( 21,675 ) 19,024 General banking income (loss) $ 49,258 $ 27,423 $ ( 16,931 ) $ 112,945 Selected Financial Information Total assets $ 18,282,757 $ 18,126,327 $ 18,282,757 $ 18,126,327 Depreciation and amortization $ 9,656 $ 9,483 $ 27,998 $ 25,496 Wealth Management Net interest income $ 1,525 $ 1,494 $ 4,337 $ 4,462 Provision for credit losses ( 3 ) ( 2,220 ) 162 ( 2,131 ) Noninterest income 9,340 8,740 28,007 26,293 Noninterest expense 8,113 8,281 24,425 24,276 Income before income taxes 2,755 4,173 7,757 8,610 Income taxes 683 1,043 1,928 2,153 Wealth management income $ 2,072 $ 3,130 $ 5,829 $ 6,457 Selected Financial Information Total assets $ 197,615 $ 194,837 $ 197,615 $ 194,837 Depreciation and amortization $ 62 $ 63 $ 188 $ 199 Consolidated Net interest income $ 154,714 $ 138,637 $ 428,573 $ 416,136 Provision for credit losses 6,548 8,426 33,793 17,884 Noninterest income (loss) 37,562 36,921 ( 64,369 ) 111,828 Noninterest expense 123,270 130,291 361,260 369,501 Income (loss) from continuing operations 62,458 36,841 ( 30,849 ) 140,579 Income taxes 11,128 6,288 ( 19,747 ) 21,177 Consolidated income (loss) from $ 51,330 $ 30,553 $ ( 11,102 ) $ 119,402 Selected Financial Information Total assets from continuing operations $ 18,480,372 $ 18,321,164 $ 18,480,372 $ 18,321,164 Depreciation and amortization from $ 9,718 $ 9,546 $ 28,186 $ 25,695

Accounting Policies Recently Ad

Accounting Policies Recently Adopted and Pending Accounting Pronouncements	9 Months Ended
	Sep. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Policies Recently Adopted and Pending Accounting Pronouncements	Note 20 – Accounting Policies Recently Adopted and Pending Accounting Pronouncements Accounting Policies Recently Adopted Except for the changes detailed below, Trustmark has consistently applied its accounting policies to all periods presented in the accompanying consolidated financial statements. ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” Issued in November 2023, ASU 2023-07 is intended to improve disclosures about a public entity’s reportable segments and address requests from investors and other allocators of capital for additional, more detailed information about a reportable segment’s expenses. The amendments of ASU 2023-07 require a public entity to disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker (CODM) and included within each reported measure of segment profit or loss, and an amount for other segment items by reportable segment and a description of its composition. The other segment items category is the difference between segment revenue less the significant expenses disclosed and each reported measure of segment profit or loss. ASU 2023-07 also requires a public entity to provide all annual disclosures about a reportable segment’s profit or loss and assets currently required under FASB ASC Topic 280 in interim periods. The amendments of ASU 2023-07 clarify that if the CODM uses more than one measure of a segment's profit or loss in assessing segment performance and deciding how to allocate resources, a public entity may report one or more of those additional measures of segment profit. However, at least one of the reported segment profit or loss measures (or the single reported measure if only one is disclosed) should be the measure that is most consistent with the measurement principles used in measuring the corresponding amounts in the public entity's consolidated financial statements. ASU 2023-07 requires a public entity to disclose the title and position of the CODM, together with an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. In addition, ASU 2023-07 requires that a public entity with a single reportable segment provide all the disclosures required by the amendments of ASU 2023-07 and all existing segment disclosures in FASB ASC Topic 280. The amendments of ASU 2023-07 are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments in ASU 2023-07 should be applied retrospectively to all periods presented on the financial statements. Upon implementation, the segment expense categories and amounts disclosed in the prior periods should be based on the significant segment expense categories identified and disclosed in the period of adoption. Trustmark has adopted the amendments of ASU 2023-07 related to annual disclosure requirements effective January 1, 2024 , and will present any newly required annual disclosures in its Annual Report on Form 10-K for the year ending December 31, 2024. Trustmark intends to adopt the amendments of ASU 2023-07 related to interim disclosure requirements effective January 1, 2025, and will present any newly required interim disclosures beginning with its Quarterly Report on Form 10-Q for the period ending March 31, 2025. Adoption of ASU 2023-07 is no t expected to have a material impact to Trustmark’s consolidated financial statements or results of operations. Pending Accounting Pronouncements ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” Issued in December 2023, ASU 2023-09 is intended to improve the disclosures for income taxes to address requests from investors, lenders, creditors and other allocators of capital (collectively, "investors") that use the financial statements to make capital allocation decisions. During the FASB's 2021 agenda consultation process and other stakeholder outreach, investors highlighted that the current system of income tax disclosures does not provide enough information to understand the tax provision for an entity that operates in multiple jurisdictions. Investors currently rely on the rate reconciliation table and other disclosures, including total income taxes paid in the statement of cash flows, to evaluate income tax risks and opportunities. The amendments in ASU 2023-09 will require consistent categories and greater disaggregation of information in the rate reconciliation disclosure as well as disclosure of income taxes paid disaggregated by jurisdiction. The amendments of ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. Trustmark intends to adopt the amendments of ASU 2023-09 effective January 1, 2025 , and will include the required disclosures in its Annual Report on Form 10-K for the year ending December 31, 2025. Trustmark is currently evaluating the changes to disclosures required by ASU 2023-09; however, adoption of ASU 2023-09 is no t expected to have a material impact to Trustmark’s consolidated financial statements or results of operations.

Accounting Policies Recently _2

Accounting Policies Recently Adopted and Pending Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Securities Available for Sale	Securities Available for Sale Quarterly, Trustmark evaluates if any security has a fair value less than its amortized cost. Once these securities are identified, in order to determine whether a decline in fair value resulted from a credit loss or other factors, Trustmark performs further analysis. If Trustmark determines that a credit loss exists, the credit portion of the allowance is measured using a discounted cash flow (DCF) analysis using the effective interest rate as of the security’s purchase date. The amount of credit loss recorded by Trustmark is limited to the amount by which the amortized cost exceeds the fair value. The DCF analysis utilizes contractual maturities, as well as third-party credit ratings and cumulative default rates published annually by Moody’s Investor Service (Moody’s). At both September 30, 2024 and December 31, 2023 , the results of the analysis did not identify any securities that warranted DCF analysis, and no credit loss was recognized on any of the securities available for sale. Accrued interest receivable is excluded from the estimate of credit losses for securities available for sale. At September 30, 2024 , accrued interest receivable totaled $ 5.1 million for securities available for sale compared to $ 3.7 million December 31, 2023 and was reported in other assets on the accompanying consolidated balance sheet.
Securities Held to Maturity	Securities Held to Maturity At September 30, 2024 , Trustmark identified no securities held to maturity with the potential for credit loss exposure, compared to $ 340 thousand at December 31, 2023 , which consisted of municipal securities. After applying appropriate analysis, the total amount of current expected credit losses was zero at September 30, 2024 and immaterial at December 31, 2023. No reserve was recorded at either September 30, 2024 or December 31, 2023. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity. At September 30, 2024 , accrued interest receivable totaled $ 2.5 million for securities held to maturity compared to $ 2.6 million at December 31, 2023 and was reported in other assets on the accompanying consolidated balance sheet. At both September 30, 2024 and December 31, 2023, Trustmark had no securities held to maturity that were past due 30 days or more as to principal or interest payments. Trustmark had no securities held to maturity classified as nonaccrual at September 30, 2024 and December 31, 2023 .
Allowance for Credit Losses, LHFI (ACL)	ACL on LHFI Trustmark’s ACL methodology for LHFI is based upon guidance within the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Subtopic 326-20 as well as applicable regulatory guidance. The ACL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Credit quality within the LHFI portfolio is continuously monitored by Management and is reflected within the ACL for LHFI. The ACL is an estimate of expected losses inherent within Trustmark’s existing LHFI portfolio. The ACL for LHFI is adjusted through the PCL, LHFI and reduced by the charge off of loan amounts, net of recoveries. The methodology for estimating the amount of expected credit losses reported in the ACL has two basic components: a collective, or pooled, component for estimated expected credit losses for pools of loans that share similar risk characteristics, and an asset-specific component involving individual loans that do not share risk characteristics with other loans and the measurement of expected credit losses for such individual loans. In estimating the ACL for the collective component, loans are segregated into loan pools based on loan product types and similar risk characteristics. The loans secured by real estate and other loans secured by real estate portfolio segments include loans for both commercial and residential properties. The underwriting process for these loans includes analysis of the financial position and strength of both the borrower and guarantor, experience with similar projects in the past, market demand and prospects for successful completion of the proposed project within the established budget and schedule, values of underlying collateral, availability of permanent financing, maximum loan-to-value ratios, minimum equity requirements, acceptable amortization periods and minimum debt service coverage requirements, based on property type. The borrower’s financial strength and capacity to repay their obligations remain the primary focus of underwriting. Financial strength is evaluated based upon analytical tools that consider historical and projected cash flows and performance in addition to analysis of the proposed project for income-producing properties. Additional support offered by guarantors is also considered. Ultimate repayment of these loans is sensitive to interest rate changes, general economic conditions, liquidity and availability of long-term financing. The commercial and industrial LHFI portfolio segment includes loans within Trustmark’s geographic markets made to many types of businesses for various purposes, such as short-term working capital loans that are usually secured by accounts receivable and inventory and term financing for equipment and fixed asset purchases that are secured by those assets. Trustmark’s credit underwriting process for commercial and industrial loans includes analysis of historical and projected cash flows and performance, evaluation of financial strength of both borrowers and guarantors as reflected in current and detailed financial information and evaluation of underlying collateral to support the credit. The consumer LHFI portfolio segment is comprised of loans that are centrally underwritten based on the borrower's credit bureau score as well as an evaluation of the borrower’s repayment capacity, credit, and collateral. Property appraisals are obtained to assist in evaluating collateral. Loan-to-value and debt-to-income ratios, loan amount, and lien position are also considered in assessing whether to originate a loan. These borrowers are particularly susceptible to downturns in economic trends such as conditions that negatively affect housing prices and demand and levels of unemployment. The state and other political subdivision LHFI and the other commercial LHFI and leases portfolio segments primarily consist of loans to non-depository financial institutions, such as mortgage companies, finance companies and other financial intermediaries, loans to state and political subdivisions, and loans to non-profit and charitable organizations. These loans are underwritten based on the specific nature or purpose of the loan and underlying collateral with special consideration given to the specific source of repayment for the loan. The lease segment primarily consists of commercial equipment finance leases. Trustmark’s credit underwriting process for equipment finance leases includes analysis of historical and projected cash flows and performance, evaluation of financial strength of both borrowers and guarantors as reflected in current and detailed financial information and evaluation of underlying collateral to support the credit. During the first quarter of 2024 as part of Trustmark's ongoing model monitoring procedures the annual loss driver analysis was performed. The analysis resulted in changes in the loss drivers for all discounted cash-flow models along with changes in the loss drivers for the equipment and finance loans and leases model. These changes were a result of updating Trustmark's peer group and incorporating data through 2022 which led to more intuitive loss drivers. All models were validated by a third party before implementation. The following table provides a description of each of Trustmark’s portfolio segments, loan classes, loan pools and the ACL methodology and loss drivers at September 30, 2024: Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Loans secured by real estate Construction, land 1-4 family residential DCF National HPI, National Unemployment Lots and development DCF National HPI, National Unemployment Unimproved land DCF National HPI, National Unemployment All other consumer DCF National HPI, National Unemployment Other secured by 1-4 Consumer 1-4 family - 1st liens DCF National HPI, National Unemployment All other consumer DCF National HPI, National Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Secured by nonfarm, Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - office DCF National CRE Price Index, Southern Unemployment Nonowner-occupied- Retail DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - senior DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Other real estate secured Nonresidential nonowner DCF National CRE Price Index, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Other loans secured by Other construction Other construction DCF National CRE Price Index, National Unemployment, BBB 7-10 US CBI Secured by 1-4 family Trustmark mortgage WARM Southern Unemployment Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Commercial and Commercial and Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance loans WARM Southern Unemployment, National GDP Credit cards WARM Trustmark call report data Consumer loans Consumer loans Credit cards WARM Trustmark call report data Overdrafts Loss Rate Trustmark historical data All other consumer DCF National HPI, National Unemployment State and other political State and other political Obligations of state and DCF Moody's Bond Default Study Other commercial loans and leases Other commercial loans and leases Other loans DCF BBB 7-10 US CBI, Southern Unemployment Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance leases WARM Southern Unemployment, National GDP The following table provides a description of each of Trustmark’s portfolio segments, loan classes, loan pools and the ACL methodology and loss drivers at December 31, 2023: Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Loans secured by real estate Construction, land 1-4 family residential DCF Prime Rate, National GDP Lots and development DCF Prime Rate, Southern Unemployment Unimproved land DCF Prime Rate, Southern Unemployment All other consumer DCF Southern Unemployment Other secured by 1-4 Consumer 1-4 family - 1st liens DCF Prime Rate, Southern Unemployment All other consumer DCF Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Secured by nonfarm, Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - office DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied- Retail DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - senior DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Other real estate secured Nonresidential nonowner DCF Southern Vacancy Rate, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Other loans secured by Other construction Other construction DCF Prime Rate, National Unemployment Secured by 1-4 family Trustmark mortgage WARM Southern Unemployment Commercial and Commercial and Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance loans WARM Southern Unemployment, Southern GDP Credit cards WARM Trustmark call report data Consumer loans Consumer loans Credit cards WARM Trustmark call report data Overdrafts Loss Rate Trustmark historical data All other consumer DCF Southern Unemployment State and other political State and other political Obligations of state and DCF Moody's Bond Default Study Other commercial loans and leases Other commercial loans and leases Other loans DCF Prime Rate, Southern Unemployment Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance leases WARM Southern Unemployment, Southern GDP During 2022, Management elected to incorporate a methodology change related to the other construction pool. Components of this change include management utilizing an alternative LDA to support the PD and LGD assumptions necessary to apply a DCF methodology to the other construction pool. Fundamentally, this approach utilizes publicly reported default balances and leverages a generalized linear model (GLM) framework to estimate PD. Taken together, these differences allow for results to be scaled to be specific and directly applicable to the other construction segment. LGD is assumed to be a through-the-cycle constant based on the actual performance of Trustmark’s other construction segment. These assumptions are then input into the DCF model and used in conjunction with prepayment data to calculate the cash flows at the individual loan level. Previously, the other construction pool used the weighted average remaining maturity (WARM) method. Management believes this change is commensurate with the level of risk in the pool. For the commercial and industrial loans related pools, Trustmark uses its own PD and LGD data, instead of the macroeconomic variables and the Frye Jacobs method described above, to calculate the PD and LGD as there were no defensible macroeconomic variables that correlated to Trustmark’s losses. Trustmark utilizes a third-party Bond Default Study to derive the PD and LGD for the obligations of state and political subdivisions pool. Due to the lack of losses within this pool, no defensible macroeconomic factors were identified to correlate. The PD and LGD measures are used in conjunction with prepayment data as inputs into the DCF model to calculate the cash flows at the individual loan level. Contractual cash flows based on loan terms are adjusted for PD, LGD and prepayments to derive loss cash flows. These loss cash flows are discounted by the loan’s coupon rate to arrive at the discounted cash flow based quantitative loss. The prepayment studies are updated quarterly by a third-party for each applicable pool. An alternate method of estimating the ACL is used for certain loan pools due to specific characteristics of these loans. For the non-DCF pools, specifically, those using the WARM method, the remaining life is incorporated into the ACL quantitative calculation. During the second quarter of 2024, Trustmark executed a sale on a portfolio of 1-4 family mortgage loans that were at least three payments delinquent and/or nonaccrual at the time of selection. As a result of this sale, a credit mark was established for a sub-pool of the loans in the sale. Due to the lack of historical experience and the use of industry data for this sub-pool, management elected to use the credit mark for reserving purposes on a go forward basis for this sub-pool that meets the same credit criteria of being three payments delinquent and/or nonaccrual. All loans of the sub-pool that meet the above credit criteria will be removed from the 1-4 family residential properties pool and placed into a separate pool with the credit mark reserve applied to the total balance. Trustmark determined that reasonable and supportable forecasts could be made for a twelve-month period for all of its loan pools. To the extent the lives of the loans in the LHFI portfolio extend beyond this forecast period, Trustmark uses a reversion period of four quarters and reverts to the historical mean on a straight-line basis over the remaining life of the loans. The econometric models currently in production reflect segment or pool level sensitivities of PD to changes in macroeconomic variables. By measuring the relationship between defaults and changes in the economy, the quantitative reserve incorporates reasonable and supportable forecasts of future conditions that will affect the value of Trustmark’s assets, as required by FASB ASC Topic 326. Under stable forecasts, these linear regressions will reasonably predict a pool’s PD. However, due to the COVID-19 pandemic, the macroeconomic variables used for reasonable and supportable forecasting changed rapidly. At the macroeconomic levels experienced during the COVID-19 pandemic, it was not clear that the models in production would produce reasonably representative results since the models were originally estimated using data beginning in 2004 through 2019. During this period, a traditional, albeit severe, economic recession occurred. Thus, econometric models are sensitive to similar future levels of PD. In order to prevent the econometric models from extrapolating beyond reasonable boundaries of their input variables, Trustmark chose to establish an upper and lower limit process when applying the periodic forecasts. In this way, Management will not rely upon unobserved and untested relationships in the setting of the quantitative reserve. This approach applies to all input variables, including: Southern Unemployment, National Unemployment, National Gross Domestic Product (GDP), National Home Price Index (HPI), National Commercial Real Estate (CRE) Price Index and the BBB 7-10 Year US Corporate Bond Index (CBI). The upper and lower limits are based on the distribution of the macroeconomic variable by selecting extreme percentiles at the upper and lower limits of the distribution, the 1 st and 99 th percentiles, respectively. These upper and lower limits are then used to calculate the PD for the forecast time period in which the forecasted values are outside of the upper and lower limit range. Due to multiple periods having a PD or LGD at or near zero as a result of the improving macroeconomic forecasts, Management implemented PD and LGD floors to account for the risk associated with each portfolio. The PD and LGD floors are based on Trustmark’s historical loss experience and applied at a portfolio level. Qualitative factors used in the ACL methodology include the following: • Lending policies and procedures • Economic conditions and concentrations of credit • Nature and volume of the portfolio • Performance trends • External factors While all these factors are incorporated into the overall methodology, only four are currently considered active at September 30, 2024: (i) economic conditions and concentrations of credit, (ii) nature and volume of the portfolio, (iii) performance trends and (iv) external factors. Two of Trustmark’s largest loan classes are the loans secured by nonfarm, nonresidential properties and the loans secured by other real estate. Trustmark elected to create a qualitative factor specifically for these loan classes which addresses changes in the economic conditions of metropolitan areas and applies additional pool level reserves. This qualitative factor is based on third-party market data and forecast trends and is updated quarterly as information is available, by market and by loan pool. Trustmark's current quantitative methodologies do not completely incorporate changes in credit quality. As a result, Trustmark utilizes the performance trends qualitative factor. This factor is based on migration analyses, that allocates additional ACL to non-pass/delinquent loans within each pool. In this way, Management believes the ACL will directly reflect changes in risk, based on the performance of the loans within a pool, whether declining or improving. The performance trends qualitative factor is estimated by properly segmenting loan pools into risk levels by risk rating for commercial credits and delinquency status for consumer credits. A migration analysis is then performed quarterly using a third-party software and the results for each risk level are compiled to calculate the historical PD average for each loan portfolio based on risk levels. This average historical PD rate is updated annually. For the mortgage portfolio, Trustmark uses an internal report to incorporate a roll rate method for the calculation of the PD rate. In addition to the PD rate for each portfolio, Management incorporates the quantitative rate and the k value derived from the Frye-Jacobs method to calculate a loss estimate that includes both PD and LGD. The quantitative rate is used to eliminate any additional reserve that the quantitative reserve already includes. Finally, the loss estimate rate is then applied to the total balances for each risk level for each portfolio to calculate a qualitative reserve. During 2022, Management elected to activate the nature and volume of the portfolio qualitative factor as a result of a sub-pool of the secured by 1-4 family residential properties growing to a significant size along with the underlying nature being different as well. The nature and volume of the portfolio qualitative factor utilizes a WARM methodology that uses industry data for the assumptions to support the qualitative adjustment. The industry data is used to compile a PD based on credit score ranges along with using the industry data to compile an LGD. The sub-pool of credits is then aggregated into the appropriate credit score bands in which a weighted average loss rate is calculated based on the PD and LGD for each credit score range. This weighted average loss rate is then applied to the expected balance for the sub-segment of credits. This total is then used as the qualitative reserve adjustment. The external factors qualitative factor is Management’s best judgment on the loan or pool level impact of all factors that affect the portfolio that are not accounted for using any other part of the ACL methodology ( e.g. , natural disasters, changes in legislation, impacts due to technology and pandemics). During the third quarter of 2024, Trustmark activated the External Factor – Credit Quality Review qualitative factor. This qualitative factor ensures reserve adequacy for collectively evaluated commercial loans that may not have been identified and downgraded timely for various reasons. This qualitative factor population is all commercial loans risk rated 1-5. These loans are then applied to the historical average of the Watch/Special Mention rated percentage. Then the balance of these loans are applied additional reserves based on the same reserve rates utilized in the performance trends qualitative factor for Watch/Special Mention rated loans. Then the Watch/Special Mention population is applied the historical Substandard rated percentage and then subsequently applied the Substandard reserve rate utilized in the performance trends qualitative factor as well. The historical Watch/Special Mention and Substandard rated percentage averages captures the weighted average life of the commercial loan portfolio. Thus, Trustmark will allocate additional reserves to capture the proportion of potential Watch/Special Mention and Substandard rated credits that may not have been categorized as such at any given point in time through the life of the commercial loan portfolio.
Accounting Policies Recently Adopted	Accounting Policies Recently Adopted Except for the changes detailed below, Trustmark has consistently applied its accounting policies to all periods presented in the accompanying consolidated financial statements. ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” Issued in November 2023, ASU 2023-07 is intended to improve disclosures about a public entity’s reportable segments and address requests from investors and other allocators of capital for additional, more detailed information about a reportable segment’s expenses. The amendments of ASU 2023-07 require a public entity to disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker (CODM) and included within each reported measure of segment profit or loss, and an amount for other segment items by reportable segment and a description of its composition. The other segment items category is the difference between segment revenue less the significant expenses disclosed and each reported measure of segment profit or loss. ASU 2023-07 also requires a public entity to provide all annual disclosures about a reportable segment’s profit or loss and assets currently required under FASB ASC Topic 280 in interim periods. The amendments of ASU 2023-07 clarify that if the CODM uses more than one measure of a segment's profit or loss in assessing segment performance and deciding how to allocate resources, a public entity may report one or more of those additional measures of segment profit. However, at least one of the reported segment profit or loss measures (or the single reported measure if only one is disclosed) should be the measure that is most consistent with the measurement principles used in measuring the corresponding amounts in the public entity's consolidated financial statements. ASU 2023-07 requires a public entity to disclose the title and position of the CODM, together with an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. In addition, ASU 2023-07 requires that a public entity with a single reportable segment provide all the disclosures required by the amendments of ASU 2023-07 and all existing segment disclosures in FASB ASC Topic 280. The amendments of ASU 2023-07 are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments in ASU 2023-07 should be applied retrospectively to all periods presented on the financial statements. Upon implementation, the segment expense categories and amounts disclosed in the prior periods should be based on the significant segment expense categories identified and disclosed in the period of adoption. Trustmark has adopted the amendments of ASU 2023-07 related to annual disclosure requirements effective January 1, 2024 , and will present any newly required annual disclosures in its Annual Report on Form 10-K for the year ending December 31, 2024. Trustmark intends to adopt the amendments of ASU 2023-07 related to interim disclosure requirements effective January 1, 2025, and will present any newly required interim disclosures beginning with its Quarterly Report on Form 10-Q for the period ending March 31, 2025. Adoption of ASU 2023-07 is no t expected to have a material impact to Trustmark’s consolidated financial statements or results of operations. Pending Accounting Pronouncements ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” Issued in December 2023, ASU 2023-09 is intended to improve the disclosures for income taxes to address requests from investors, lenders, creditors and other allocators of capital (collectively, "investors") that use the financial statements to make capital allocation decisions. During the FASB's 2021 agenda consultation process and other stakeholder outreach, investors highlighted that the current system of income tax disclosures does not provide enough information to understand the tax provision for an entity that operates in multiple jurisdictions. Investors currently rely on the rate reconciliation table and other disclosures, including total income taxes paid in the statement of cash flows, to evaluate income tax risks and opportunities. The amendments in ASU 2023-09 will require consistent categories and greater disaggregation of information in the rate reconciliation disclosure as well as disclosure of income taxes paid disaggregated by jurisdiction. The amendments of ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. Trustmark intends to adopt the amendments of ASU 2023-09 effective January 1, 2025 , and will include the required disclosures in its Annual Report on Form 10-K for the year ending December 31, 2025. Trustmark is currently evaluating the changes to disclosures required by ASU 2023-09; however, adoption of ASU 2023-09 is no t expected to have a material impact to Trustmark’s consolidated financial statements or results of operations.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
Summary of Disposal Groups, Including Discontinued Operations	The following table summarizes financial information related to FBBI which has been segregated from continuing operations and reported as discontinued operations for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Noninterest income: Insurance commissions $ — $ 15,303 $ 27,728 $ 44,372 Gain on sale of discontinued operations, net — — 228,272 — Other, net — — 527 954 Total noninterest income — 15,303 256,527 45,326 Noninterest expense: Salaries and employee benefits — 9,292 16,263 27,718 Services and fees — 410 704 1,245 Net occupancy - premises — 232 269 757 Equipment expense — 61 93 238 Other expense — 659 2,046 2,031 Total noninterest expense — 10,654 19,375 31,989 Income from discontinued operations before income taxes — 4,649 237,152 13,337 Income taxes from discontinued operations — 1,173 59,353 3,373 Income from discontinued operations $ — $ 3,476 $ 177,799 $ 9,964 The assets and liabilities of discontinued operations on the consolidated balance sheet at December 31, 2023 were as follows ($ in thousands): December 31, 2023 Carrying amounts of assets included as part of discontinued operations: Cash and due from banks $ 200 Premises and equipment, net 308 Goodwill 49,633 Identifiable intangible assets, net 2,729 Operating lease right-of-use assets 2,431 Other assets 12,333 Assets of discontinued operations $ 67,634 Carrying amounts of liabilities included as part of discontinued operations: Operating lease liabilities $ 2,487 Other liabilities 9,540 Liabilities of discontinued operations $ 12,027

Securities Available for Sale_2

Securities Available for Sale and Held to Maturity (Tables)	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Available for Sale and Held to Maturity Securities	The following tables are a summary of the amortized cost and estimated fair value of securities available for sale and held to maturity at September 30, 2024 and December 31, 2023 ($ in thousands): Securities Available for Sale Securities Held to Maturity September 30, 2024 Amortized Gross Gross Estimated Amortized Gross Gross Estimated U.S. Treasury securities $ 198,426 $ 4,212 $ — $ 202,638 $ 29,648 $ 232 $ — $ 29,880 U.S. Government agency 19,494 — ( 159 ) 19,335 — — — — Mortgage-backed securities Residential mortgage pass- Guaranteed by GNMA 27,787 15 ( 2,004 ) 25,798 17,773 3 ( 407 ) 17,369 Issued by FNMA and 1,086,688 32,970 ( 14,348 ) 1,105,310 436,177 2,104 ( 11,088 ) 427,193 Other residential mortgage- Issued or guaranteed by — — — — 131,348 — ( 6,179 ) 125,169 Commercial mortgage-backed Issued or guaranteed by 359,160 14,326 ( 772 ) 372,714 743,412 139 ( 26,995 ) 716,556 Total $ 1,691,555 $ 51,523 $ ( 17,283 ) $ 1,725,795 $ 1,358,358 $ 2,478 $ ( 44,669 ) $ 1,316,167 Securities Available for Sale Securities Held to Maturity December 31, 2023 Amortized Gross Gross Estimated Amortized Gross Gross Estimated U.S. Treasury Securities $ 396,179 $ — $ ( 23,811 ) $ 372,368 $ 29,068 $ — $ ( 26 ) $ 29,042 U.S. Government agency 6,207 1 ( 416 ) 5,792 — — — — Obligations of states and — — — — 340 — — 340 Mortgage-backed securities Residential mortgage pass- Guaranteed by GNMA 25,744 4 ( 2,613 ) 23,135 13,005 — ( 497 ) 12,508 Issued by FNMA and 1,338,256 32 ( 161,490 ) 1,176,798 469,593 — ( 18,205 ) 451,388 Other residential mortgage- Issued or guaranteed by 92,076 — ( 6,002 ) 86,074 154,466 — ( 10,113 ) 144,353 Commercial mortgage-backed Issued or guaranteed by 100,545 — ( 1,834 ) 98,711 759,807 51 ( 41,985 ) 717,873 Total $ 1,959,007 $ 37 $ ( 196,166 ) $ 1,762,878 $ 1,426,279 $ 51 $ ( 70,826 ) $ 1,355,504
Securities Held to Maturity by Credit Rating, as Determined by Moody's	The following table presents the amortized cost of Trustmark’s securities held to maturity by credit rating, as determined by Moody’s, at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Aaa $ 1,358,358 $ 1,425,939 Not Rated (1) — 340 Total $ 1,358,358 $ 1,426,279 (1) Not rated securities primarily consist of Mississippi municipal general obligations.
Securities with Gross Unrealized Losses, Segregated by Length of Impairment	The tables below include securities with gross unrealized losses for which an allowance for credit losses has not been recorded segregated by length of impairment at September 30, 2024 and December 31, 2023 ($ in thousands): Less than 12 Months 12 Months or More Total September 30, 2024 Estimated Gross Estimated Gross Estimated Gross U.S. Government agency obligations $ 19,335 $ ( 159 ) $ — $ — $ 19,335 $ ( 159 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 11,089 ( 51 ) 29,760 ( 2,360 ) 40,849 ( 2,411 ) Issued by FNMA and FHLMC 18,133 ( 72 ) 254,346 ( 25,364 ) 272,479 ( 25,436 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 125,169 ( 6,179 ) 125,169 ( 6,179 ) Commercial mortgage-backed securities Issued or guaranteed by FNMA, — — 792,767 ( 27,767 ) 792,767 ( 27,767 ) Total $ 48,557 $ ( 282 ) $ 1,202,042 $ ( 61,670 ) $ 1,250,599 $ ( 61,952 ) December 31, 2023 U.S. Treasury Securities $ 29,042 $ ( 26 ) $ 372,368 $ ( 23,811 ) $ 401,410 $ ( 23,837 ) U.S. Government agency obligations — — 5,791 ( 416 ) 5,791 ( 416 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 9,381 ( 172 ) 25,967 ( 2,938 ) 35,348 ( 3,110 ) Issued by FNMA and FHLMC 309,466 ( 3,274 ) 1,311,865 ( 176,421 ) 1,621,331 ( 179,695 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 230,368 ( 16,115 ) 230,368 ( 16,115 ) Commercial mortgage-backed securities Issued or guaranteed by FNMA, 1,656 ( 13 ) 812,520 ( 43,806 ) 814,176 ( 43,819 ) Total $ 349,545 $ ( 3,485 ) $ 2,758,879 $ ( 263,507 ) $ 3,108,424 $ ( 266,992 )
Gains and Losses as a Result of Calls and Disposition of Securities	For the periods presented, gross realized losses as a result of calls and dispositions of securities, as well as any associated proceeds, are shown below ($ in thousands). There were no gross realized gains during the periods presented. Three Months Ended September 30, Nine Months Ended September 30, Available for Sale 2024 2023 2024 2023 Proceeds from calls and sales of securities $ — $ — $ 1,378,272 $ — Gross realized (losses) — — ( 182,792 ) —
Contractual Maturities of Available for Sale and Held to Maturity Securities	The amortized cost and estimated fair value of securities available for sale and held to maturity at September 30, 2024, by contractual maturity, are shown below ($ in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities Securities Amortized Estimated Amortized Estimated Due in one year or less $ 42,751 $ 42,962 $ — $ — Due after one year through five years 75,223 76,656 29,648 29,880 Due after five years through ten years 99,946 102,355 — — 217,920 221,973 29,648 29,880 Mortgage-backed securities 1,473,635 1,503,822 1,328,710 1,286,287 Total $ 1,691,555 $ 1,725,795 $ 1,358,358 $ 1,316,167

LHFI and ACL, LHFI (Tables)

LHFI and ACL, LHFI (Tables)	9 Months Ended
	Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loan Portfolio Held for Investment	At September 30, 2024 and December 31, 2023, LHFI consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Loans secured by real estate: Construction, land development and other land $ 614,787 $ 642,886 Other secured by 1-4 family residential properties 647,843 622,397 Secured by nonfarm, nonresidential properties 3,582,552 3,489,434 Other real estate secured 1,475,798 1,312,551 Other loans secured by real estate: Other construction 973,469 867,793 Secured by 1-4 family residential properties 2,247,163 2,282,318 Commercial and industrial loans 1,767,079 1,922,910 Consumer loans 152,611 165,734 State and other political subdivision loans 996,002 1,088,466 Other commercial loans and leases 642,807 556,035 LHFI 13,100,111 12,950,524 Less ACL 157,929 139,367 Net LHFI $ 12,942,182 $ 12,811,157
Schedule of Amortized Cost Basis of Loans on Nonaccrual Status	The following tables provide the amortized cost basis of loans on nonaccrual status and loans past due 90 days or more still accruing interest at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Nonaccrual With No ACL Total Nonaccrual Loans Past Due 90 Days or More Still Accruing Loans secured by real estate: Construction, land development and other land $ — $ 362 $ — Other secured by 1-4 family residential properties 870 6,168 889 Secured by nonfarm, nonresidential properties 10,558 12,156 — Other real estate secured 1,989 2,122 — Other loans secured by real estate: Other construction — 60 — Secured by 1-4 family residential properties 1,577 19,966 4,019 Commercial and industrial loans 23 31,710 — Consumer loans — 243 444 Other commercial loans and leases — 1,038 — Total $ 15,017 $ 73,825 $ 5,352 December 31, 2023 Nonaccrual With No ACL Total Nonaccrual Loans Past Due 90 Days or More Still Accruing Loans secured by real estate: Construction, land development and other land $ 2,020 $ 2,642 $ — Other secured by 1-4 family residential properties 946 6,518 1,238 Secured by nonfarm, nonresidential properties 20,812 23,061 54 Other real estate secured — 158 106 Other loans secured by real estate: Other construction — 62 — Secured by 1-4 family residential properties 3,235 43,815 3,740 Commercial and industrial loans 79 22,303 24 Consumer loans — 243 628 Other commercial loans and leases — 1,206 — Total $ 27,092 $ 100,008 $ 5,790
Aging Analysis of Past Due and Nonaccrual LHFI by Loan Type	The following tables provide an aging analysis of the amortized cost basis of past due LHFI (including nonaccrual LHFI) at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total LHFI Loans secured by real estate: Construction, land development and $ 249 $ 213 $ 188 $ 650 $ 614,137 $ 614,787 Other secured by 1-4 family residential 6,054 2,588 3,748 12,390 635,453 647,843 Secured by nonfarm, nonresidential 2,137 3,917 793 6,847 3,575,705 3,582,552 Other real estate secured 518 — 28 546 1,475,252 1,475,798 Other loans secured by real estate: Other construction 60 — — 60 973,409 973,469 Secured by 1-4 family residential properties 18,517 7,316 14,313 40,146 2,207,017 2,247,163 Commercial and industrial loans 4,221 421 9,391 14,033 1,753,046 1,767,079 Consumer loans 1,788 628 448 2,864 149,747 152,611 State and other political subdivision loans 44 — — 44 995,958 996,002 Other commercial loans and leases 2,407 8 20 2,435 640,372 642,807 Total $ 35,995 $ 15,091 $ 28,929 $ 80,015 $ 13,020,096 $ 13,100,111 December 31, 2023 Past Due 30-59 Days 60-89 Days 90 Days More Total Past Due Current Total LHFI Loans secured by real estate: Construction, land development and $ 93 $ 507 $ 2,362 $ 2,962 $ 639,924 $ 642,886 Other secured by 1-4 family residential 4,493 1,687 2,716 8,896 613,501 622,397 Secured by nonfarm, nonresidential 1,531 1,063 727 3,321 3,486,113 3,489,434 Other real estate secured 126 — 207 333 1,312,218 1,312,551 Other loans secured by real estate: Other construction 62 — — 62 867,731 867,793 Secured by 1-4 family residential properties 19,298 9,327 22,164 50,789 2,231,529 2,282,318 Commercial and industrial loans 11,881 484 499 12,864 1,910,046 1,922,910 Consumer loans 2,112 772 647 3,531 162,203 165,734 State and other political subdivision loans 152 — — 152 1,088,314 1,088,466 Other commercial loans and leases 1,247 58 — 1,305 554,730 556,035 Total $ 40,995 $ 13,898 $ 29,322 $ 84,215 $ 12,866,309 $ 12,950,524
Impact of Modifications Classified as Troubled Debt Restructurings	The following tables present the amortized cost of LHFI at the end of each of the periods presented of loans modified to borrowers experiencing financial difficulty disaggregated by class of loan and type of modification ($ in thousands). The percentage of the amortized cost basis of LHFI that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of LHFI is also presented below: Three Months Ended September 30, 2024 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 886 $ 886 0.14 % Other loans secured by real estate: Secured by 1-4 family residential properties — 30 30 0.00 % Commercial and industrial loans 6,207 — 6,207 0.35 % Total $ 6,207 $ 916 $ 7,123 0.05 % Three Months Ended September 30, 2023 Term Extension % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ 96 0.02 % Other loans secured by real estate: Secured by 1-4 family residential properties 346 0.02 % Total $ 442 0.00 % Nine Months Ended September 30, 2024 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ — $ 2,638 $ 2,638 0.41 % Other loans secured by real estate: Secured by 1-4 family residential properties — 30 30 0.00 % Commercial and industrial loans 6,207 — 6,207 0.35 % Total $ 6,207 $ 2,668 $ 8,875 0.07 % Nine Months Ended September 30, 2023 Payment Concession Term Extension Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential $ — $ 494 $ 494 0.08 % Secured by nonfarm, nonresidential — 370 370 0.01 % Other loans secured by real estate: Secured by 1-4 family residential properties — 912 912 0.04 % Commercial and industrial loans 255 — 255 0.01 % Consumer loans — 40 40 0.02 % Other commercial loans and leases 116 31 147 0.03 % Total $ 371 $ 1,847 $ 2,218 0.02 %
Troubled debt restructurings on financial effect	The following tables detail the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the periods presented: Three Months Ended September 30, 2024 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified two loans and seven lines of credit to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified one loan to amortize over 24 month term Commercial and industrial loans Thirty-four month principal payment deferral Three Months Ended September 30, 2023 Financial Effect Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified lines of credit to amortize over 12 month and 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Extended amortization on loans with term adjusted by weighted-average 10.6 years Nine Months Ended September 30, 2024 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified three loans and twenty-seven lines to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified one loan to amortize over 24 month term Commercial and industrial loans Thirty-four month principal payment deferral Nine Months Ended September 30, 2023 Financial Effect Payment Concessions Term Extension Loans secured by real estate: Other secured by 1-4 family residential properties Modified lines of credit to amortize over 12 month and 24 month terms Secured by nonfarm, nonresidential properties One loan renewed and extended maturity by six months Other loans secured by real estate: Secured by 1-4 family residential properties Extended amortization with term adjusted by weighted-average 3.2 years Commercial and industrial loans Six month payment deferrals Consumer loans Bankruptcies extended amortization with term adjusted by weighted average 1.3 years reducing borrower payment Other commercial loans and leases Six month payment deferral One loan renewed and extended maturity by seven months
Past Due Modifications Related To Loans Held For Investment	The following tables provide details of the performance of such LHFI that have been modified during the periods presented ($ in thousands): Three Months Ended September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ — $ — $ — $ — $ 886 $ 886 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 30 30 Commercial and industrial loans — — — — 6,207 6,207 Total $ — $ — $ — $ — $ 7,123 $ 7,123 Three Months Ended September 30, 2023 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ — $ — $ — $ — $ 96 $ 96 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 346 346 Total $ — $ — $ — $ — $ 442 $ 442 Nine Months Ended September 30, 2024 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ 114 $ 50 $ 42 $ 206 $ 2,432 $ 2,638 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 30 30 Commercial and industrial loans — — — — 6,207 6,207 Total $ 114 $ 50 $ 42 $ 206 $ 8,669 $ 8,875 Nine Months Ended September 30, 2023 Past Due 30-59 Days 60-89 Days 90 Days Total Past Due Current Total Loans secured by real estate: Other secured by 1-4 family residential $ 272 $ — $ — $ 272 $ 222 $ 494 Secured by nonfarm, nonresidential — — — — 370 370 Other loans secured by real estate: Secured by 1-4 family residential properties 170 — — 170 742 912 Commercial and industrial loans — — — — 255 255 Consumer loans 20 — — 20 20 40 Other commercial loans and leases — — — — 147 147 Total $ 462 $ — $ — $ 462 $ 1,756 $ 2,218
Schedule Of Amortized Cost Basis Of Collateral Dependent Loans by Class of Loans	The following tables present the amortized cost basis of collateral-dependent loans by class of loans and collateral type as of September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Other secured by 1-4 family $ 870 $ — $ — $ 870 Secured by nonfarm, nonresidential 10,558 — — 10,558 Other real estate secured 1,989 — — 1,989 Other loans secured by real estate: Secured by 1-4 family residential 1,577 — — 1,577 Commercial and industrial loans — 2,086 27,554 29,640 Other commercial loans and leases — — 906 906 Total $ 14,994 $ 2,086 $ 28,460 $ 45,540 December 31, 2023 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Construction, land development and $ 2,020 $ — $ — $ 2,020 Other secured by 1-4 family 946 — — 946 Secured by nonfarm, nonresidential 20,812 — — 20,812 Other loans secured by real estate: Secured by 1-4 family residential 3,235 — — 3,235 Commercial and industrial loans 38 41 21,023 21,102 Other commercial loans and leases — — 967 967 Total $ 27,051 $ 41 $ 21,990 $ 49,082
Carrying Amount of Loans by Credit Quality Indicator	The tables below present the amortized cost basis of loans by credit quality indicator and class of loans based on analyses performed at September 30, 2024 and December 31, 2023 ($ in thousands): Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Commercial LHFI Loans secured by real estate: Construction, land Pass - RR 1 through RR 6 $ 313,423 $ 115,646 $ 39,923 $ 25,444 $ 8,471 $ 2,409 $ 42,086 $ 547,402 Special Mention - RR 7 2,575 989 — — — — 553 4,117 Substandard - RR 8 5 65 64 — 17 — 165 316 Doubtful - RR 9 — — — — — — — — Total 316,003 116,700 39,987 25,444 8,488 2,409 42,804 551,835 Current period gross — — — — — ( 24 ) — ( 24 ) Other secured by 1-4 family Pass - RR 1 through RR 6 $ 23,695 $ 25,412 $ 23,921 $ 25,271 $ 12,086 $ 3,804 $ 7,859 $ 122,048 Special Mention - RR 7 27 — — 36 — — — 63 Substandard - RR 8 51 887 578 334 — 202 30 2,082 Doubtful - RR 9 — — — — — — — — Total 23,773 26,299 24,499 25,641 12,086 4,006 7,889 124,193 Current period gross — — — — — ( 12 ) — ( 12 ) Secured by nonfarm, Pass - RR 1 through RR 6 $ 498,807 $ 416,459 $ 936,901 $ 475,161 $ 481,754 $ 420,554 $ 101,623 $ 3,331,259 Special Mention - RR 7 — — 55,301 — 32,937 3,400 — 91,638 Substandard - RR 8 8,664 6,847 34,486 28,222 23,510 57,905 — 159,634 Doubtful - RR 9 13 — — — — 8 — 21 Total 507,484 423,306 1,026,688 503,383 538,201 481,867 101,623 3,582,552 Current period gross — — — ( 2,412 ) — ( 16 ) — ( 2,428 ) Other real estate secured: Pass - RR 1 through RR 6 $ 168,609 $ 97,427 $ 649,069 $ 260,090 $ 139,030 $ 44,283 $ 7,461 $ 1,365,969 Special Mention - RR 7 — — 25,348 27,448 — — 426 53,222 Substandard - RR 8 14,632 — 963 15,046 258 25,426 — 56,325 Doubtful - RR 9 42 — — — — — — 42 Total 183,283 97,427 675,380 302,584 139,288 69,709 7,887 1,475,558 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Commercial LHFI Other loans secured by real Other construction: Pass - RR 1 through RR 6 $ 90,334 $ 421,500 $ 305,414 $ 54,232 $ — $ — $ 29,914 $ 901,394 Special Mention - RR 7 — — 43,443 9,393 — — — 52,836 Substandard - RR 8 60 — — — 19,179 — — 19,239 Doubtful - RR 9 — — — — — — — — Total 90,394 421,500 348,857 63,625 19,179 — 29,914 973,469 Current period gross — — ( 2,494 ) — — — — ( 2,494 ) Commercial and industrial Pass - RR 1 through RR 6 $ 383,881 $ 380,031 $ 265,702 $ 102,706 $ 52,400 $ 45,251 $ 406,087 $ 1,636,058 Special Mention - RR 7 — 615 14,201 52 — — 18,877 33,745 Substandard - RR 8 7,496 1,923 57,073 12,683 970 367 16,216 96,728 Doubtful - RR 9 227 — 173 145 — 3 — 548 Total 391,604 382,569 337,149 115,586 53,370 45,621 441,180 1,767,079 Current period gross ( 128 ) ( 85 ) ( 430 ) ( 461 ) ( 86 ) ( 3,111 ) ( 85 ) ( 4,386 ) State and other political Pass - RR 1 through RR 6 $ 55,360 $ 121,591 $ 244,434 $ 157,287 $ 83,156 $ 331,105 $ 3,069 $ 996,002 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 — — — — — — — — Doubtful - RR 9 — — — — — — — — Total 55,360 121,591 244,434 157,287 83,156 331,105 3,069 996,002 Current period gross — — — — — — — — Other commercial loans and leases: Pass - RR 1 through RR 6 $ 145,848 $ 179,925 $ 19,906 $ 32,234 $ 17,013 $ 32,572 $ 212,999 $ 640,497 Special Mention - RR 7 — — 140 70 — — — 210 Substandard - RR 8 873 96 128 22 — — 981 2,100 Doubtful - RR 9 — — — — — — — — Total 146,721 180,021 20,174 32,326 17,013 32,572 213,980 642,807 Current period gross — — ( 28 ) — — ( 25 ) — ( 53 ) Total commercial $ 1,714,622 $ 1,769,413 $ 2,717,168 $ 1,225,876 $ 870,781 $ 967,289 $ 848,346 $ 10,113,495 Total commercial LHFI $ ( 128 ) $ ( 85 ) $ ( 2,952 ) $ ( 2,873 ) $ ( 86 ) $ ( 3,188 ) $ ( 85 ) $ ( 9,397 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Consumer LHFI Loans secured by real estate: Construction, land Current $ 21,981 $ 27,681 $ 4,712 $ 3,735 $ 1,079 $ 2,076 $ 1,175 $ 62,439 Past due 30-89 days — 311 118 — — 32 — 461 Past due 90 days or more — — — — — — — — Nonaccrual — — 23 4 — 25 — 52 Total 21,981 27,992 4,853 3,739 1,079 2,133 1,175 62,952 Current period gross — — — — — ( 8 ) — ( 8 ) Other secured by 1-4 family Current $ 19,886 $ 20,261 $ 7,529 $ 5,367 $ 3,747 $ 9,421 $ 444,331 $ 510,542 Past due 30-89 days 1,726 264 59 65 49 676 4,060 6,899 Past due 90 days or more 55 — 8 — — 162 615 840 Nonaccrual 35 29 66 46 104 586 4,503 5,369 Total 21,702 20,554 7,662 5,478 3,900 10,845 453,509 523,650 Current period gross ( 28 ) ( 29 ) ( 206 ) ( 40 ) ( 14 ) ( 52 ) — ( 369 ) Other real estate secured: Current $ 136 $ — $ — $ — $ 70 $ 34 $ — $ 240 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total 136 — — — 70 34 — 240 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of September 30, 2024 Consumer LHFI Other loans secured by real Secured by 1-4 family Current $ 174,559 $ 234,420 $ 827,385 $ 471,999 $ 166,513 $ 325,051 $ — $ 2,199,927 Past due 30-89 days 632 4,345 10,101 5,510 850 1,815 — 23,253 Past due 90 days or more 273 828 2,359 327 198 34 — 4,019 Nonaccrual — 2,072 10,612 2,806 1,233 3,241 — 19,964 Total 175,464 241,665 850,457 480,642 168,794 330,141 — 2,247,163 Current period gross — ( 143 ) ( 9,466 ) ( 106 ) ( 1 ) ( 107 ) — ( 9,823 ) Consumer loans: Current $ 46,034 $ 27,761 $ 15,546 $ 5,548 $ 1,460 $ 235 $ 52,980 $ 149,564 Past due 30-89 days 697 422 238 40 1 8 954 2,360 Past due 90 days or more 49 26 15 — — — 353 443 Nonaccrual 24 30 77 67 23 — 23 244 Total 46,804 28,239 15,876 5,655 1,484 243 54,310 152,611 Current period gross ( 4,413 ) ( 650 ) ( 373 ) ( 94 ) ( 88 ) — ( 2,004 ) ( 7,622 ) Total consumer LHFI $ 266,087 $ 318,450 $ 878,848 $ 495,514 $ 175,327 $ 343,396 $ 508,994 $ 2,986,616 Total consumer LHFI $ ( 4,441 ) $ ( 822 ) $ ( 10,045 ) $ ( 240 ) $ ( 103 ) $ ( 167 ) $ ( 2,004 ) $ ( 17,822 ) Total LHFI $ 1,980,709 $ 2,087,863 $ 3,596,016 $ 1,721,390 $ 1,046,108 $ 1,310,685 $ 1,357,340 $ 13,100,111 Total current period $ ( 4,569 ) $ ( 907 ) $ ( 12,997 ) $ ( 3,113 ) $ ( 189 ) $ ( 3,355 ) $ ( 2,089 ) $ ( 27,219 ) Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Commercial LHFI Loans secured by real estate: Construction, land Pass - RR 1 through RR 6 $ 359,813 $ 98,742 $ 35,095 $ 10,591 $ 2,036 $ 1,961 $ 52,351 $ 560,589 Special Mention - RR 7 — — 360 — — — — 360 Substandard - RR 8 606 336 1,512 19 — 21 — 2,494 Doubtful - RR 9 — — — — — 24 — 24 Total 360,419 99,078 36,967 10,610 2,036 2,006 52,351 563,467 Current period gross — ( 4 ) ( 10 ) — ( 228 ) — — ( 242 ) Other secured by 1-4 family Pass - RR 1 through RR 6 $ 33,072 $ 30,760 $ 29,159 $ 14,309 $ 8,084 $ 2,822 $ 10,077 $ 128,283 Special Mention - RR 7 — 82 48 10 — — — 140 Substandard - RR 8 220 625 157 22 80 306 98 1,508 Doubtful - RR 9 — — — — — — — — Total 33,292 31,467 29,364 14,341 8,164 3,128 10,175 129,931 Current period gross — — ( 24 ) — — ( 6 ) — ( 30 ) Secured by nonfarm, Pass - RR 1 through RR 6 $ 501,327 $ 919,519 $ 526,412 $ 596,240 $ 323,687 $ 369,250 $ 129,142 $ 3,365,577 Special Mention - RR 7 4,271 14,930 — 138 23,966 — — 43,305 Substandard - RR 8 6,332 1,964 47,491 10,809 8,614 5,200 48 80,458 Doubtful - RR 9 21 — — — 53 13 — 87 Total 511,951 936,413 573,903 607,187 356,320 374,463 129,190 3,489,427 Current period gross — ( 39 ) ( 82 ) — ( 19 ) ( 138 ) — ( 278 ) Other real estate secured: Pass - RR 1 through RR 6 $ 194,141 $ 447,200 $ 332,818 $ 209,757 $ 56,024 $ 11,080 $ 8,880 $ 1,259,900 Special Mention - RR 7 126 2,076 — — 35,881 — — 38,083 Substandard - RR 8 — 14,064 — 290 — 39 — 14,393 Doubtful - RR 9 42 — — — — — — 42 Total 194,309 463,340 332,818 210,047 91,905 11,119 8,880 1,312,418 Current period gross — — — — — — — — Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Commercial LHFI Other loans secured by real Other construction Pass - RR 1 through RR 6 $ 179,676 $ 518,062 $ 149,883 $ 14,062 $ — $ 6 $ 6,042 $ 867,731 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 62 — — — — — — 62 Doubtful - RR 9 — — — — — — — — Total 179,738 518,062 149,883 14,062 — 6 6,042 867,793 Current period gross ( 61 ) — ( 3,392 ) — — — — ( 3,453 ) Commercial and industrial Pass - RR 1 through RR 6 $ 497,730 $ 474,737 $ 158,659 $ 80,646 $ 31,876 $ 44,972 $ 537,527 $ 1,826,147 Special Mention - RR 7 12,570 10,141 3,149 1,381 110 — 126 27,477 Substandard - RR 8 4,797 16,872 13,909 11,958 40 80 21,528 69,184 Doubtful - RR 9 6 58 1 — — 25 12 102 Total 515,103 501,808 175,718 93,985 32,026 45,077 559,193 1,922,910 Current period gross ( 42 ) ( 1,071 ) ( 700 ) ( 138 ) ( 95 ) ( 108 ) ( 7 ) ( 2,161 ) State and other political Pass - RR 1 through RR 6 $ 152,157 $ 247,034 $ 174,812 $ 99,786 $ 32,118 $ 377,225 $ 5,334 $ 1,088,466 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 — — — — — — — — Doubtful - RR 9 — — — — — — — — Total 152,157 247,034 174,812 99,786 32,118 377,225 5,334 1,088,466 Current period gross — — — — — — — — Other commercial loans and leases: Pass - RR 1 through RR 6 $ 211,402 $ 48,947 $ 30,071 $ 21,377 $ 32,837 $ 8,468 $ 201,339 $ 554,441 Special Mention - RR 7 — — — 208 — — 20 228 Substandard - RR 8 106 211 42 — — — 987 1,346 Doubtful - RR 9 — — — — — 20 — 20 Total 211,508 49,158 30,113 21,585 32,837 8,488 202,346 556,035 Current period gross ( 40 ) ( 248 ) — ( 26 ) — — — ( 314 ) Total commercial $ 2,158,477 $ 2,846,360 $ 1,503,578 $ 1,071,603 $ 555,406 $ 821,512 $ 973,511 $ 9,930,447 Total commercial LHFI $ ( 143 ) $ ( 1,362 ) $ ( 4,208 ) $ ( 164 ) $ ( 342 ) $ ( 252 ) $ ( 7 ) $ ( 6,478 ) Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Consumer LHFI Loans secured by real estate: Construction, land Current $ 44,912 $ 23,110 $ 5,973 $ 1,203 $ 1,082 $ 1,864 $ 653 $ 78,797 Past due 30-89 days — 250 — — 30 191 — 471 Past due 90 days or more — — — — — — — — Nonaccrual — — 148 — — 3 — 151 Total 44,912 23,360 6,121 1,203 1,112 2,058 653 79,419 Current period gross — — — — — — — — Other secured by 1-4 family Current $ 29,636 $ 11,366 $ 5,733 $ 4,471 $ 4,313 $ 7,674 $ 417,383 $ 480,576 Past due 30-89 days 225 68 74 4 51 220 4,292 4,934 Past due 90 days or more — 264 — — — 41 934 1,239 Nonaccrual 8 76 48 8 — 616 4,961 5,717 Total 29,869 11,774 5,855 4,483 4,364 8,551 427,570 492,466 Current period gross — ( 100 ) ( 9 ) ( 2 ) ( 10 ) ( 22 ) ( 147 ) ( 290 ) Secured by nonfarm, Current $ — $ — $ 7 $ — $ — $ — $ — $ 7 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total — — 7 — — — — 7 Current period gross — — — — — — — — Other real estate secured: Current $ — $ — $ — $ 78 $ — $ 55 $ — $ 133 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total — — — 78 — 55 — 133 Current period gross — — — — — — — — Term Loans by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Total As of December 31, 2023 Consumer LHFI Other loans secured by real Secured by 1-4 family Current $ 258,800 $ 878,893 $ 516,324 $ 180,272 $ 98,552 $ 277,664 $ — $ 2,210,505 Past due 30-89 days 3,370 11,293 5,513 2,121 298 1,664 — 24,259 Past due 90 days or more 376 1,219 1,208 682 — 255 — 3,740 Nonaccrual 678 15,586 11,452 4,884 1,848 9,366 — 43,814 Total 263,224 906,991 534,497 187,959 100,698 288,949 — 2,282,318 Current period gross ( 64 ) ( 930 ) ( 217 ) ( 104 ) — ( 142 ) — ( 1,457 ) Consumer loans: Current $ 59,496 $ 32,767 $ 10,698 $ 2,604 $ 917 $ 294 $ 55,321 $ 162,097 Past due 30-89 days 1,274 475 134 34 5 5 839 2,766 Past due 90 days or more 64 44 3 1 — — 516 628 Nonaccrual 44 65 84 26 — — 24 243 Total 60,878 33,351 10,919 2,665 922 299 56,700 165,734 Current period gross ( 6,138 ) ( 559 ) ( 167 ) ( 43 ) ( 1 ) ( 1 ) ( 2,381 ) ( 9,290 ) Total consumer LHFI $ 398,883 $ 975,476 $ 557,399 $ 196,388 $ 107,096 $ 299,912 $ 484,923 $ 3,020,077 Total consumer LHFI $ ( 6,202 ) $ ( 1,589 ) $ ( 393 ) $ ( 149 ) $ ( 11 ) $ ( 165 ) $ ( 2,528 ) $ ( 11,037 ) Total LHFI $ 2,557,360 $ 3,821,836 $ 2,060,977 $ 1,267,991 $ 662,502 $ 1,121,424 $ 1,458,434 $ 12,950,524 Total current period $ ( 6,345 ) $ ( 2,951 ) $ ( 4,601 ) $ ( 313 ) $ ( 353 ) $ ( 417 ) $ ( 2,535 ) $ ( 17,515 )
Summary of Trustmark's Portfolio Segments, Loan Classes, Loan Pools and the ACL Methodology and Loss Drivers	The following table provides a description of each of Trustmark’s portfolio segments, loan classes, loan pools and the ACL methodology and loss drivers at September 30, 2024: Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Loans secured by real estate Construction, land 1-4 family residential DCF National HPI, National Unemployment Lots and development DCF National HPI, National Unemployment Unimproved land DCF National HPI, National Unemployment All other consumer DCF National HPI, National Unemployment Other secured by 1-4 Consumer 1-4 family - 1st liens DCF National HPI, National Unemployment All other consumer DCF National HPI, National Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Secured by nonfarm, Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - office DCF National CRE Price Index, Southern Unemployment Nonowner-occupied- Retail DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - senior DCF National CRE Price Index, Southern Unemployment Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Other real estate secured Nonresidential nonowner DCF National CRE Price Index, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National CRE Price Index Nonowner-occupied - DCF National CRE Price Index, Southern Unemployment Other loans secured by Other construction Other construction DCF National CRE Price Index, National Unemployment, BBB 7-10 US CBI Secured by 1-4 family Trustmark mortgage WARM Southern Unemployment Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Commercial and Commercial and Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance loans WARM Southern Unemployment, National GDP Credit cards WARM Trustmark call report data Consumer loans Consumer loans Credit cards WARM Trustmark call report data Overdrafts Loss Rate Trustmark historical data All other consumer DCF National HPI, National Unemployment State and other political State and other political Obligations of state and DCF Moody's Bond Default Study Other commercial loans and leases Other commercial loans and leases Other loans DCF BBB 7-10 US CBI, Southern Unemployment Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance leases WARM Southern Unemployment, National GDP The following table provides a description of each of Trustmark’s portfolio segments, loan classes, loan pools and the ACL methodology and loss drivers at December 31, 2023: Portfolio Segment Loan Class Loan Pool Methodology Loss Drivers Loans secured by real estate Construction, land 1-4 family residential DCF Prime Rate, National GDP Lots and development DCF Prime Rate, Southern Unemployment Unimproved land DCF Prime Rate, Southern Unemployment All other consumer DCF Southern Unemployment Other secured by 1-4 Consumer 1-4 family - 1st liens DCF Prime Rate, Southern Unemployment All other consumer DCF Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Secured by nonfarm, Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - office DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied- Retail DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - senior DCF Southern Vacancy Rate, Southern Unemployment Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Other real estate secured Nonresidential nonowner DCF Southern Vacancy Rate, Southern Unemployment Nonresidential owner-occupied DCF Southern Unemployment, National GDP Nonowner-occupied - DCF Southern Vacancy Rate, Southern Unemployment Other loans secured by Other construction Other construction DCF Prime Rate, National Unemployment Secured by 1-4 family Trustmark mortgage WARM Southern Unemployment Commercial and Commercial and Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance loans WARM Southern Unemployment, Southern GDP Credit cards WARM Trustmark call report data Consumer loans Consumer loans Credit cards WARM Trustmark call report data Overdrafts Loss Rate Trustmark historical data All other consumer DCF Southern Unemployment State and other political State and other political Obligations of state and DCF Moody's Bond Default Study Other commercial loans and leases Other commercial loans and leases Other loans DCF Prime Rate, Southern Unemployment Commercial and industrial - DCF Trustmark historical data Commercial and industrial - DCF Trustmark historical data Equipment finance leases WARM Southern Unemployment, Southern GDP
Change in Allowance for Loan Losses	The following tables disaggregate the ACL and the amortized cost basis of the loans by the measurement methodology used at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 ACL LHFI Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total Loans secured by real estate: Construction, land development and $ — $ 6,121 $ 6,121 $ — 614,787 $ 614,787 Other secured by 1-4 family residential — 10,729 10,729 870 646,973 647,843 Secured by nonfarm, nonresidential — 36,287 36,287 10,558 3,571,994 3,582,552 Other real estate secured — 13,071 13,071 1,989 1,473,809 1,475,798 Other loans secured by real estate: Other construction — 13,841 13,841 — 973,469 973,469 Secured by 1-4 family residential — 31,742 31,742 1,577 2,245,586 2,247,163 Commercial and industrial loans 16,390 16,155 32,545 29,640 1,737,439 1,767,079 Consumer loans — 5,699 5,699 — 152,611 152,611 State and other political subdivision loans — 1,166 1,166 — 996,002 996,002 Other commercial loans and leases 896 5,832 6,728 906 641,901 642,807 Total $ 17,286 $ 140,643 $ 157,929 $ 45,540 $ 13,054,571 $ 13,100,111 December 31, 2023 ACL LHFI Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total Loans secured by real estate: Construction, land development and $ — $ 17,192 $ 17,192 $ 2,020 $ 640,866 $ 642,886 Other secured by 1-4 family residential — 12,942 12,942 946 621,451 622,397 Secured by nonfarm, nonresidential — 24,043 24,043 20,812 3,468,622 3,489,434 Other real estate secured — 4,488 4,488 — 1,312,551 1,312,551 Other loans secured by real estate: Other construction — 5,758 5,758 — 867,793 867,793 Secured by 1-4 family residential — 34,794 34,794 3,235 2,279,083 2,282,318 Commercial and industrial loans 11,436 15,202 26,638 21,102 1,901,808 1,922,910 Consumer loans — 5,794 5,794 — 165,734 165,734 State and other political subdivision loans — 646 646 — 1,088,466 1,088,466 Other commercial loans and leases 967 6,105 7,072 967 555,068 556,035 Total $ 12,403 $ 126,964 $ 139,367 $ 49,082 $ 12,901,442 $ 12,950,524 Changes in the ACL, LHFI were as follows for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Balance at beginning of period $ 154,685 $ 129,298 $ 139,367 $ 120,214 Loans charged-off, sale of 1-4 family mortgage loans — — ( 8,633 ) — Loans charged-off ( 7,142 ) ( 7,496 ) ( 18,586 ) ( 13,265 ) Recoveries 2,463 3,907 6,821 7,305 Net (charge-offs) recoveries ( 4,679 ) ( 3,589 ) ( 20,398 ) ( 5,960 ) PCL, LHFI 7,923 8,322 30,327 19,777 PCL, LHFI sale of 1-4 family mortgage loans — — 8,633 — Balance at end of period $ 157,929 $ 134,031 $ 157,929 $ 134,031 The following tables detail changes in the ACL, LHFI by loan class for the periods presented ($ in thousands): Three Months Ended September 30, 2024 Balance at Beginning of Period Charge-offs Recoveries PCL Balance at Loans secured by real estate: Construction, land development and other land $ 5,101 $ ( 8 ) $ 614 $ 414 $ 6,121 Other secured by 1-4 family residential properties 10,373 ( 201 ) 55 502 10,729 Secured by nonfarm, nonresidential properties 41,136 — 20 ( 4,869 ) 36,287 Other real estate secured 12,037 — — 1,034 13,071 Other loans secured by real estate: Other construction 13,897 — 69 ( 125 ) 13,841 Secured by 1-4 family residential properties 30,647 ( 632 ) 16 1,711 31,742 Commercial and industrial loans 28,735 ( 3,611 ) 193 7,228 32,545 Consumer loans 5,645 ( 2,690 ) 1,496 1,248 5,699 State and other political subdivision loans 625 — — 541 1,166 Other commercial loans and leases 6,489 — — 239 6,728 Total $ 154,685 $ ( 7,142 ) $ 2,463 $ 7,923 $ 157,929 Three Months Ended September 30, 2023 Balance at Beginning of Period Charge-offs Recoveries PCL Balance at Loans secured by real estate: Construction, land development and other land $ 15,343 $ ( 228 ) $ 22 $ 2,104 $ 17,241 Other secured by 1-4 family residential properties 12,173 ( 110 ) 43 457 12,563 Secured by nonfarm, nonresidential properties 20,376 ( 192 ) 2,216 898 23,298 Other real estate secured 3,481 — — 84 3,565 Other loans secured by real estate: Other construction 14,377 ( 3,453 ) 15 ( 4,633 ) 6,306 Secured by 1-4 family residential properties 28,555 ( 448 ) 7 2,030 30,144 Commercial and industrial loans 23,170 ( 635 ) 267 953 23,755 Consumer loans 5,540 ( 2,421 ) 1,337 1,348 5,804 State and other political subdivision loans 676 — — ( 11 ) 665 Other commercial loans and leases 5,607 ( 9 ) — 5,092 10,690 Total $ 129,298 $ ( 7,496 ) $ 3,907 $ 8,322 $ 134,031 Nine Months Ended September 30, 2024 Balance at Beginning of Period Charge-offs Recoveries PCL Balance at Loans secured by real estate: Construction, land development and other land $ 17,192 $ ( 32 ) $ 622 $ ( 11,661 ) $ 6,121 Other secured by 1-4 family residential properties 12,942 ( 381 ) 568 ( 2,400 ) 10,729 Secured by nonfarm, nonresidential properties 24,043 ( 2,428 ) 46 14,626 36,287 Other real estate secured 4,488 — — 8,583 13,071 Other loans secured by real estate: Other construction 5,758 ( 2,494 ) 341 10,236 13,841 Secured by 1-4 family residential properties 34,794 ( 9,823 ) 81 6,690 31,742 Commercial and industrial loans 26,638 ( 4,386 ) 663 9,630 32,545 Consumer loans 5,794 ( 7,622 ) 4,448 3,079 5,699 State and other political subdivision loans 646 — — 520 1,166 Other commercial loans and leases 7,072 ( 53 ) 52 ( 343 ) 6,728 Total $ 139,367 $ ( 27,219 ) $ 6,821 $ 38,960 $ 157,929 Nine Months Ended September 30, 2023 Balance at Beginning of Period Charge-offs Recoveries PCL Balance at Loans secured by real estate: Construction, land development and other land $ 12,828 $ ( 242 ) $ 94 $ 4,561 $ 17,241 Other secured by 1-4 family residential properties 12,374 ( 230 ) 165 254 12,563 Secured by nonfarm, nonresidential properties 19,488 ( 278 ) 2,322 1,766 23,298 Other real estate secured 4,743 — 5 ( 1,183 ) 3,565 Other loans secured by real estate: Other construction 15,132 ( 3,453 ) 63 ( 5,436 ) 6,306 Secured by 1-4 family residential properties 21,185 ( 903 ) 27 9,835 30,144 Commercial and industrial loans 23,140 ( 1,562 ) 754 1,423 23,755 Consumer loans 5,792 ( 6,565 ) 3,875 2,702 5,804 State and other political subdivision loans 885 — — ( 220 ) 665 Other commercial loans and leases 4,647 ( 32 ) — 6,075 10,690 Total $ 120,214 $ ( 13,265 ) $ 7,305 $ 19,777 $ 134,031

Mortgage Banking (Tables)

Mortgage Banking (Tables)	9 Months Ended
	Sep. 30, 2024
Mortgage Banking [Abstract]
Schedule of Activity in the Mortgage Servicing Rights	The activity in the MSR is detailed in the table below for the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Balance at beginning of period $ 131,870 $ 129,677 Origination of servicing assets 9,419 11,025 Change in fair value: Due to market changes ( 6,909 ) 8,735 Due to run-off ( 8,527 ) ( 7,058 ) Balance at end of period $ 125,853 $ 142,379
Schedule of Mortgage Loans Sold and Serviced for Others	The table below details the mortgage loans sold and serviced for others at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Federal National Mortgage Association $ 4,832,202 $ 4,826,028 Government National Mortgage Association 3,644,092 3,510,983 Federal Home Loan Mortgage Corporation 183,520 112,352 Other 31,424 28,012 Total mortgage loans sold and serviced for others $ 8,691,238 $ 8,477,375

Other Real Estate (Tables)

Other Real Estate (Tables)	9 Months Ended
	Sep. 30, 2024
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Changes and Gains (Losses), Net on Other Real Estate	For the periods presented, changes and gains (losses), net on other real estate were as follows ($ in thousands): Nine Months Ended September 30, 2024 2023 Balance at beginning of period $ 6,867 $ 1,986 Additions 4,703 5,434 Disposals ( 5,609 ) ( 1,903 ) (Write-downs) recoveries ( 2,041 ) ( 32 ) Balance at end of period $ 3,920 $ 5,485 Gains (losses), net on the sale of other real estate included in $ ( 1,054 ) $ ( 159 )
Other Real Estate, by Type of Property	At September 30, 2024 and December 31, 2023, other real estate by type of property consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 1-4 family residential properties $ 1,629 $ 1,977 Nonfarm, nonresidential properties 2,291 4,835 Other real estate properties — 55 Total other real estate $ 3,920 $ 6,867
Other Real Estate, by Geographic Location	At September 30, 2024 and December 31, 2023, other real estate by geographic location consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Alabama $ 170 $ 1,397 Mississippi (1) 1,772 1,242 Texas 1,978 4,228 Total other real estate $ 3,920 $ 6,867 (1) Mississippi includes Central and Southern Mississippi Regions. (2) Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Components of the Trustmark's Net Investment in its Sales-Type and Direct Financing Leases	The table below summarizes the components of Trustmark's net investment in its sales-type and direct financing leases for the periods presented ($ in thousands): September 30, 2024 December 31, 2023 Leases receivable $ 285,239 $ 161,319 Unearned income ( 48,170 ) ( 29,011 ) Initial direct costs 2,455 1,326 Unguaranteed lease residual 8,209 4,101 Total net investment $ 247,733 $ 137,735
Minimum Future Lease Payments for Trustmark's Leases Receivable	The table below details the minimum future lease payments for Trustmark's leases receivable at September 30, 2024 ($ in thousands): September 30, 2024 2024 (excluding the nine months ended September 30, 2024) $ 13,948 2025 49,378 2026 48,274 2027 60,828 2028 49,986 Thereafter 62,825 Lease receivable $ 285,239
Components of Net Lease Cost	The following table details the components of net lease cost for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Finance leases: Amortization of right-of-use assets $ 113 $ 113 $ 339 $ 673 Interest on lease liabilities 37 41 113 124 Operating lease cost 1,344 1,258 3,756 3,566 Short-term lease cost 61 51 173 181 Variable lease cost 218 192 623 639 Sublease income ( 58 ) ( 3 ) ( 63 ) ( 9 ) Net lease cost $ 1,715 $ 1,652 $ 4,941 $ 5,174
Cash Payments Included in Measurement of Lease Liabilities	The following table details the cash payments included in the measurement of lease liabilities during the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Finance leases: Operating cash flows included in operating activities $ 113 $ 124 Financing cash flows included in payments under finance lease obligations 315 627 Operating leases: Operating cash flows (fixed payments) included in other operating activities, net 3,535 3,022 Operating cash flows (liability reduction) included in other operating activities, net 2,515 2,425
Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases	The following table details balance sheet information, as well as weighted-average lease terms and discount rates, related to leases at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Finance lease right-of-use assets, net of accumulated depreciation $ 3,412 $ 3,751 Finance lease liabilities 4,019 4,334 Operating lease right-of-use assets 36,034 35,711 Operating lease liabilities 39,689 39,097 Weighted-average lease term: Finance leases 7.60 years 8.34 years Operating leases 9.50 years 10.28 years Weighted-average discount rate: Finance leases 3.61 % 3.61 % Operating leases 3.72 % 3.67 %
Future Minimum Rental Commitments Under Finance and Operating Leases	At September 30, 2024, future minimum rental commitments under finance and operating leases were as follows ($ in thousands): Finance Leases Operating Leases 2024 (excluding the nine months ended September 30, 2024) $ 145 $ 1,312 2025 584 5,292 2026 589 5,169 2027 594 5,202 2028 599 4,831 Thereafter 2,086 25,922 Total minimum lease payments 4,597 47,728 Less imputed interest ( 578 ) ( 8,039 ) Lease liabilities $ 4,019 $ 39,689

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2024
Deposits [Abstract]
Deposits Summary	At September 30, 2024 and December 31, 2023, deposits consisted of the following ($ in thousands): September 30, 2024 December 31, 2023 Noninterest-bearing demand $ 3,142,792 $ 3,197,620 Interest-bearing demand 5,423,462 4,947,626 Savings 3,335,686 4,047,853 Time 3,338,995 3,376,664 Total $ 15,240,935 $ 15,569,763

Securities Sold Under Repurch_2

Securities Sold Under Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2024
Securities Sold under Agreements to Repurchase [Abstract]
Schedule of Securities Sold Under Repurchase Agreements	The following table presents the securities sold under repurchase agreements by collateral pledged at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA $ 1,885 $ — Issued by FNMA and FHLMC 12,866 28,600 Other residential mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 7,960 526 Commercial mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 8,804 — Total securities sold under repurchase agreements $ 31,515 $ 29,126

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Summary of Noninterest Income (Loss) Disaggregated by Reportable Operating Segment and Revenue Stream	The following tables present noninterest income (loss) disaggregated by reportable operating segment and revenue stream for the periods presented ($ in thousands): Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Segment Service charges on deposit accounts $ 11,250 $ — $ 11,250 $ 11,052 $ — $ 11,052 Bank card and other fees 7,661 218 7,879 7,332 873 8,205 Mortgage banking, net — 6,119 6,119 — 6,458 6,458 Wealth management 175 — 175 202 — 202 Other, net 3,136 ( 337 ) 2,799 2,843 ( 579 ) 2,264 Total noninterest income (loss) $ 22,222 $ 6,000 $ 28,222 $ 21,429 $ 6,752 $ 28,181 Wealth Management Segment Service charges on deposit accounts $ 22 $ — $ 22 $ 22 $ — $ 22 Bank card and other fees 52 — 52 12 — 12 Wealth management 9,113 — 9,113 8,571 — 8,571 Other, net 59 94 153 41 94 135 Total noninterest income $ 9,246 $ 94 $ 9,340 $ 8,646 $ 94 $ 8,740 Consolidated Service charges on deposit accounts $ 11,272 $ — $ 11,272 $ 11,074 $ — $ 11,074 Bank card and other fees 7,713 218 7,931 7,344 873 8,217 Mortgage banking, net — 6,119 6,119 — 6,458 6,458 Wealth management 9,288 — 9,288 8,773 — 8,773 Other, net 3,195 ( 243 ) 2,952 2,884 ( 485 ) 2,399 Total noninterest income (loss) $ 31,468 $ 6,094 $ 37,562 $ 30,075 $ 6,846 $ 36,921 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net. Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Segment Service charges on deposit accounts $ 33,089 $ — $ 33,089 $ 32,040 $ — $ 32,040 Bank card and other fees 23,281 1,176 24,457 23,011 1,890 24,901 Mortgage banking, net — 19,238 19,238 — 20,697 20,697 Wealth management 538 — 538 650 — 650 Other, net 13,735 ( 641 ) 13,094 8,763 ( 1,516 ) 7,247 Security gains (losses), net — ( 182,792 ) ( 182,792 ) — — — Total noninterest income (loss) $ 70,643 $ ( 163,019 ) $ ( 92,376 ) $ 64,464 $ 21,071 $ 85,535 Wealth Management Segment Service charges on deposit accounts $ 65 $ — $ 65 $ 65 $ — $ 65 Bank card and other fees 127 — 127 36 — 36 Wealth management 27,394 — 27,394 25,785 — 25,785 Other, net 139 282 421 122 285 407 Total noninterest income $ 27,725 $ 282 $ 28,007 $ 26,008 $ 285 $ 26,293 Consolidated Service charges on deposit accounts $ 33,154 $ — $ 33,154 $ 32,105 $ — $ 32,105 Bank card and other fees 23,408 1,176 24,584 23,047 1,890 24,937 Mortgage banking, net — 19,238 19,238 — 20,697 20,697 Wealth management 27,932 — 27,932 26,435 — 26,435 Other, net 13,874 ( 359 ) 13,515 8,885 ( 1,231 ) 7,654 Security gains (losses), net — ( 182,792 ) ( 182,792 ) — — — Total noninterest income (loss) $ 98,368 $ ( 162,737 ) $ ( 64,369 ) $ 90,472 $ 21,356 $ 111,828 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net.

Defined Benefit and Other Pos_2

Defined Benefit and Other Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2024
Trustmark Capital Accumulation Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	The following table presents information regarding the net periodic benefit cost for the Continuing Plan for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 10 $ 13 $ 30 $ 39 Interest cost 62 73 185 219 Expected return on plan assets ( 24 ) ( 27 ) ( 72 ) ( 80 ) Recognized net (gain) loss due to lump sum settlements — — ( 13 ) 25 Net periodic benefit cost $ 48 $ 59 $ 130 $ 203
Supplemental Retirement Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	The following table presents information regarding the net periodic benefit cost for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 11 $ 17 $ 33 $ 51 Interest cost 457 497 1,393 1,515 Amortization of prior service cost 28 28 83 83 Recognized net actuarial loss 84 70 263 216 Net periodic benefit cost $ 580 $ 612 $ 1,772 $ 1,865

Stock and Incentive Compensat_2

Stock and Incentive Compensation (Tables)	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Summary of Stock Plan Activity	The following table summarizes the Stock Plan activity for the periods presented: Three Months Ended September 30, 2024 Performance Time-Vested Nonvested units, beginning of period 208,045 376,022 Granted — 1,500 Released from restriction — ( 900 ) Forfeited — ( 2,149 ) Nonvested units, end of period 208,045 374,473 Nine Months Ended September 30, 2024 Performance Time-Vested Nonvested units, beginning of period 174,214 358,252 Granted 89,928 161,646 Released from restriction ( 54,973 ) ( 134,166 ) Forfeited ( 1,124 ) ( 11,259 ) Nonvested units, end of period 208,045 374,473
Compensation Expense for Awards and Units Under Stock Plan	The following table presents information regarding compensation expense for units under the Stock Plan for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Performance units $ 522 $ 449 $ 1,506 $ 1,181 Time-vested units 808 1,045 3,440 3,591 Total compensation expense $ 1,330 $ 1,494 $ 4,946 $ 4,772

Contingencies (Tables)

Contingencies (Tables)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Summary of Changes in ACL on Off-Balance Sheet Credit Exposures	Changes in the ACL on off-balance sheet credit exposures were as follows for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Balance at beginning of period $ 30,265 $ 34,841 $ 34,057 $ 36,838 PCL, off-balance sheet credit exposures ( 1,375 ) 104 ( 5,167 ) ( 1,893 ) Balance at end of period $ 28,890 $ 34,945 $ 28,890 $ 34,945

Earnings Per Share (EPS) (Table

Earnings Per Share (EPS) (Tables)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Weighted-Average Shares Used to Calculate Basic and Diluted EPS	The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Basic shares 61,207 61,070 61,177 61,048 Dilutive shares 241 193 216 171 Diluted shares 61,448 61,263 61,393 61,219
Weighted-Average Antidilutive Stock Awards Excluded from Determining Diluted EPS	Weighted-average antidilutive stock awards are excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Weighted-average antidilutive stock awards — 23 — 75

Statements of Cash Flows (Table

Statements of Cash Flows (Tables)	9 Months Ended
	Sep. 30, 2024
Supplemental Cash Flow Information [Abstract]
Cash Flows Supplementary Disclosures	The following table reflects specific transaction amounts for the periods presented ($ in thousands): Nine Months Ended September 30, 2024 2023 Income taxes paid $ 19,887 $ 34,898 Interest expense paid on deposits and borrowings 296,939 214,745 Noncash transfers from loans to other real estate 4,703 5,434 Operating right-of-use assets resulting from lease liabilities 1,831 7,092

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2024
Stockholders' Equity Note [Abstract]
Table of Actual Regulatory Capital Amounts and Ratios	The following table provides Trustmark’s and TNB’s actual regulatory capital amounts and ratios under regulatory capital standards in effect at September 30, 2024 and December 31, 2023 ($ in thousands): Actual Regulatory Capital Minimum To Be Well Amount Ratio Requirement Capitalized At September 30, 2024: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,694,769 11.30 % 7.00 % n/a Trustmark National Bank 1,800,019 12.00 % 7.00 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,754,769 11.70 % 8.50 % n/a Trustmark National Bank 1,800,019 12.00 % 8.50 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 2,057,073 13.71 % 10.50 % n/a Trustmark National Bank 1,978,676 13.19 % 10.50 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,754,769 9.65 % 4.00 % n/a Trustmark National Bank 1,800,019 9.90 % 4.00 % 5.00 % At December 31, 2023: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,521,665 10.04 % 7.00 % n/a Trustmark National Bank 1,602,327 10.58 % 7.00 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,581,665 10.44 % 8.50 % n/a Trustmark National Bank 1,602,327 10.58 % 8.50 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,862,246 12.29 % 10.50 % n/a Trustmark National Bank 1,759,426 11.61 % 10.50 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,581,665 8.62 % 4.00 % n/a Trustmark National Bank 1,602,327 8.75 % 4.00 % 5.00 %
Net Change in Components of Accumulated Other Comprehensive Income (Loss) and the Related Tax Effects	The following table presents the net change in the components of accumulated other comprehensive income (loss) and the related tax effects allocated to each component for the periods presented ($ in thousands). Three Months Ended September 30, 2024 Three Months Ended September 30, 2023 Before Tax Tax (Expense) Net of Tax Before Tax Tax (Expense) Net of Tax Securities available for sale and transferred Net unrealized holding gains (losses) arising $ 55,892 $ ( 13,973 ) $ 41,919 $ ( 26,963 ) $ 6,740 $ ( 20,223 ) Reclassification adjustment for net (gains) losses — — — — — — Change in net unrealized holding loss on 3,688 ( 922 ) 2,766 4,000 ( 1,000 ) 3,000 Total securities available for sale 59,580 ( 14,895 ) 44,685 ( 22,963 ) 5,740 ( 17,223 ) Pension and other postretirement benefit plans: Reclassification adjustments for changes Net change in prior service costs 28 ( 7 ) 21 28 ( 7 ) 21 Recognized net loss due to lump sum — — — — — — Change in net actuarial loss 84 ( 21 ) 63 70 ( 18 ) 52 Total pension and other postretirement 112 ( 28 ) 84 98 ( 25 ) 73 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective 18,826 ( 4,706 ) 14,120 ( 11,338 ) 2,834 ( 8,504 ) Reclassification adjustment for (gain) loss 4,831 ( 1,208 ) 3,623 4,627 ( 1,157 ) 3,470 Total cash flow hedge derivatives 23,657 ( 5,914 ) 17,743 ( 6,711 ) 1,677 ( 5,034 ) Total other comprehensive income (loss) $ 83,349 $ ( 20,837 ) $ 62,512 $ ( 29,576 ) $ 7,392 $ ( 22,184 ) Nine Months Ended September 30, 2024 Nine Months Ended September 30, 2023 Before Tax Tax (Expense) Net of Tax Before Tax Tax (Expense) Net of Tax Securities available for sale and transferred Net unrealized holding gains (losses) arising $ 47,579 $ ( 11,895 ) $ 35,684 $ ( 16,062 ) $ 4,246 $ ( 11,816 ) Reclassification adjustment for net (gains) losses 182,792 ( 45,698 ) 137,094 — — — Change in net unrealized holding loss on 11,020 ( 2,755 ) 8,265 11,799 ( 2,950 ) 8,849 Total securities available for sale 241,391 ( 60,348 ) 181,043 ( 4,263 ) 1,296 ( 2,967 ) Pension and other postretirement benefit plans: Reclassification adjustments for changes Net change in prior service costs 83 ( 21 ) 62 83 ( 21 ) 62 Recognized net loss due to lump sum ( 13 ) 3 ( 10 ) 25 ( 6 ) 19 Change in net actuarial loss 263 ( 65 ) 198 216 ( 54 ) 162 Total pension and other postretirement 333 ( 83 ) 250 324 ( 81 ) 243 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective ( 2,007 ) 502 ( 1,505 ) ( 24,569 ) 6,142 ( 18,427 ) Reclassification adjustment for (gain) loss 14,520 ( 3,630 ) 10,890 11,555 ( 2,889 ) 8,666 Total cash flow hedge derivatives 12,513 ( 3,128 ) 9,385 ( 13,014 ) 3,253 ( 9,761 ) Total other comprehensive income (loss) $ 254,237 $ ( 63,559 ) $ 190,678 $ ( 16,953 ) $ 4,468 $ ( 12,485 )
Summary of Changes in Balances of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in the balances of each component of accumulated other comprehensive income (loss) for the periods presented ($ in thousands). All amounts are presented net of tax. Securities for Sale Defined Cash Flow Total Balance at January 1, 2024 $ ( 204,670 ) $ ( 6,075 ) $ ( 8,978 ) $ ( 219,723 ) Other comprehensive income (loss) before reclassification 43,949 — ( 1,505 ) 42,444 Amounts reclassified from accumulated other 137,094 250 10,890 148,234 Net other comprehensive income (loss) 181,043 250 9,385 190,678 Balance at September 30, 2024 $ ( 23,627 ) $ ( 5,825 ) $ 407 $ ( 29,045 ) Balance at January 1, 2023 $ ( 254,442 ) $ ( 5,792 ) $ ( 15,169 ) $ ( 275,403 ) Other comprehensive income (loss) before reclassification ( 2,967 ) — ( 18,427 ) ( 21,394 ) Amounts reclassified from accumulated other — 243 8,666 8,909 Net other comprehensive income (loss) ( 2,967 ) 243 ( 9,761 ) ( 12,485 ) Balance at September 30, 2023 $ ( 257,409 ) $ ( 5,549 ) $ ( 24,930 ) $ ( 287,888 )

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value Recurring Basis	The following tables summarize financial assets and financial liabilities measured at fair value on a recurring basis at September 30, 2024 and December 31, 2023, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value ($ in thousands). There were no transfers between fair value levels for the nine months ended September 30, 2024 and the year ended December 31, 2023. September 30, 2024 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 202,638 $ 202,638 $ — $ — U.S. Government agency obligations 19,335 — 19,335 — Mortgage-backed securities 1,503,822 — 1,503,822 — Securities available for sale 1,725,795 202,638 1,523,157 — LHFS 216,454 — 216,454 — MSR 125,853 — — 125,853 Other assets 20,502 302 19,496 704 Other liabilities 28,306 336 27,970 — December 31, 2023 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 372,368 $ 372,368 $ — $ — U.S. Government agency obligations 5,792 — 5,792 — Mortgage-backed securities 1,384,718 — 1,384,718 — Securities available for sale 1,762,878 372,368 1,390,510 — LHFS 184,812 — 184,812 — MSR 131,870 — — 131,870 Other assets - derivatives 23,316 7,685 14,786 845 Other liabilities - derivatives 35,600 21 35,579 —
Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	The changes in Level 3 assets measured at fair value on a recurring basis for the nine months ended September 30, 2024 and 2023 are summarized as follows ($ in thousands): MSR Other Assets - Balance, January 1, 2024 $ 131,870 $ 845 Total net (loss) gain included in Mortgage banking, net (1) ( 15,436 ) 2,154 Additions 9,419 — Sales — ( 2,295 ) Balance, September 30, 2024 $ 125,853 $ 704 The amount of total gains (losses) for the period included in earnings $ ( 6,908 ) $ 1,580 Balance, January 1, 2023 $ 129,677 $ 157 Total net (loss) gain included in Mortgage banking, net (1) 1,677 1,672 Additions 11,025 — Sales — ( 1,632 ) Balance, September 30, 2023 $ 142,379 $ 197 The amount of total gains (losses) for the period included in $ 8,734 $ 559 (1) Total net (loss) gain included in Mortgage banking, net relating to the MSR includes changes in fair value due to market changes and due to run-off.
Carrying Amounts and Estimated Fair Values of Financial Instruments	The carrying amounts and estimated fair values of financial instruments at September 30, 2024 and December 31, 2023, are as follows ($ in thousands): September 30, 2024 December 31, 2023 Carrying Estimated Carrying Estimated Financial Assets: Level 2 Inputs: Cash and short-term investments $ 815,436 $ 815,436 $ 975,343 $ 975,343 Securities held to maturity 1,358,358 1,316,167 1,426,279 1,355,504 Level 3 Inputs: Net LHFI 12,942,182 13,025,566 12,811,157 12,762,505 Financial Liabilities: Level 2 Inputs: Deposits 15,240,935 15,234,983 15,569,763 15,553,417 Federal funds purchased and securities sold under 365,643 365,643 405,745 405,745 Other borrowings 443,458 443,458 483,230 483,226 Subordinated notes 123,647 119,063 123,482 108,125 Junior subordinated debt securities 61,856 48,248 61,856 48,856
Fair Value and the Contractual Principal Outstanding of the LHFS	The following table provides information about the fair value and the contractual principal outstanding of LHFS accounted for under the fair value option at September 30, 2024 and December 31, 2023 ($ in thousands): September 30, 2024 December 31, 2023 Fair value of LHFS $ 127,015 $ 105,974 LHFS contractual principal outstanding 125,041 102,994 Fair value less unpaid principal $ 1,974 $ 2,980

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	The following tables disclose the fair value of derivative instruments in Trustmark’s consolidated balance sheets at September 30, 2024 and December 31, 2023 as well as the effect of these derivative instruments on Trustmark’s results of operations for the periods presented ($ in thousands): September 30, 2024 December 31, 2023 Derivatives in hedging relationships: Interest rate contracts: Interest rate swaps included in other assets (1) $ 3,766 $ 1,182 Interest rate floors included in other assets 3,181 1,689 Interest rate swaps included in other liabilities (1) 50 267 Derivatives not designated as hedging instruments: Interest rate contracts: Exchange traded purchased options included in other assets $ 33 $ 180 OTC written options (rate locks) included in other assets 704 845 Futures contracts included in other assets 269 7,505 Interest rate swaps included in other assets (1) 12,536 11,910 Credit risk participation agreements included in other assets 13 5 Futures contracts included in other liabilities 16 — Forward contracts included in other liabilities 144 994 Exchange traded written options included in other liabilities 320 21 Interest rate swaps included in other liabilities (1) 27,685 34,255 Credit risk participation agreements included in other liabilities 91 63 (1) In accordance with GAAP, the variation margin collateral payments made or received for interest rate swaps that are centrally cleared are legally characterized as settled. As a result, the centrally cleared interest rate swaps included in other assets and other liabilities are presented on a net basis in the accompanying consolidated balance sheets.
Effects of Derivative Instruments on Statements of Operations	Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Derivatives in hedging relationships: Amount of gain (loss) reclassified from accumulated other $ ( 4,831 ) $ ( 4,627 ) $ ( 14,520 ) $ ( 11,555 ) Derivatives not designated as hedging instruments: Amount of gain (loss) recognized in mortgage banking, net $ 7,655 $ ( 7,634 ) $ ( 478 ) $ ( 11,526 ) Amount of gain (loss) recognized in bank card and other fees ( 93 ) 381 ( 98 ) 571
Schedule of Amount Included in Other Comprehensive Income for Derivative Instruments Designated as Hedges of Cash Flows	The following table discloses the amount included in other comprehensive income (loss), net of tax, for derivative instruments designated as cash flow hedges for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Derivatives in cash flow hedging relationship Amount of gain (loss) recognized in other comprehensive $ 14,120 $ ( 8,504 ) $ ( 1,505 ) $ ( 18,427 )
Information about Financial Instruments that are Eligible for Offset in the Consolidated Balance Sheets	Information about financial instruments that are eligible for offset in the consolidated balance sheets as of September 30, 2024 and December 31, 2023 is presented in the following tables ($ in thousands): Offsetting of Derivative Assets As of September 30, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 19,483 $ — $ 19,483 $ ( 7,121 ) $ — $ 12,362 Offsetting of Derivative Liabilities As of September 30, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 27,735 $ — $ 27,735 $ ( 7,121 ) $ ( 2,850 ) $ 17,764 Offsetting of Derivative Assets As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 14,781 $ — $ 14,781 $ ( 4,339 ) $ — $ 10,442 Offsetting of Derivative Liabilities As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 34,522 $ — $ 34,522 $ ( 4,339 ) $ ( 2,040 ) $ 28,143

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Information	The following table discloses financial information by reportable segment for the periods presented ($ in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 General Banking Net interest income $ 153,189 $ 137,143 $ 424,236 $ 411,674 Provision for credit losses 6,551 10,646 33,631 20,015 Noninterest income (loss) 28,222 28,181 ( 92,376 ) 85,535 Noninterest expense 115,157 122,010 336,835 345,225 Income (loss) before income taxes 59,703 32,668 ( 38,606 ) 131,969 Income taxes 10,445 5,245 ( 21,675 ) 19,024 General banking income (loss) $ 49,258 $ 27,423 $ ( 16,931 ) $ 112,945 Selected Financial Information Total assets $ 18,282,757 $ 18,126,327 $ 18,282,757 $ 18,126,327 Depreciation and amortization $ 9,656 $ 9,483 $ 27,998 $ 25,496 Wealth Management Net interest income $ 1,525 $ 1,494 $ 4,337 $ 4,462 Provision for credit losses ( 3 ) ( 2,220 ) 162 ( 2,131 ) Noninterest income 9,340 8,740 28,007 26,293 Noninterest expense 8,113 8,281 24,425 24,276 Income before income taxes 2,755 4,173 7,757 8,610 Income taxes 683 1,043 1,928 2,153 Wealth management income $ 2,072 $ 3,130 $ 5,829 $ 6,457 Selected Financial Information Total assets $ 197,615 $ 194,837 $ 197,615 $ 194,837 Depreciation and amortization $ 62 $ 63 $ 188 $ 199 Consolidated Net interest income $ 154,714 $ 138,637 $ 428,573 $ 416,136 Provision for credit losses 6,548 8,426 33,793 17,884 Noninterest income (loss) 37,562 36,921 ( 64,369 ) 111,828 Noninterest expense 123,270 130,291 361,260 369,501 Income (loss) from continuing operations 62,458 36,841 ( 30,849 ) 140,579 Income taxes 11,128 6,288 ( 19,747 ) 21,177 Consolidated income (loss) from $ 51,330 $ 30,553 $ ( 11,102 ) $ 119,402 Selected Financial Information Total assets from continuing operations $ 18,480,372 $ 18,321,164 $ 18,480,372 $ 18,321,164 Depreciation and amortization from $ 9,718 $ 9,546 $ 28,186 $ 25,695

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Details) $ in Millions	May 31, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on disposition of discontinued operations	$ 228.3
Marsh and McLennan Agency LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from the sale of a business	$ 336.9

Discontinued Operations - Summa

Discontinued Operations - Summary of Financial Information Segregated from Continuing Operations and Reported as Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Insurance commissions	$ 0	$ 15,303	$ 27,728	$ 44,372
Gain on sale of discontinued operations, net	0	0	228,272	0
Other, net	0	0	527	954
Total noninterest income	0	15,303	256,527	45,326
Salaries and employee benefits	0	9,292	16,263	27,718
Services and fees	0	410	704	1,245
Net occupancy - premises	0	232	269	757
Equipment expense	0	61	93	238
Other expense	0	659	2,046	2,031
Total noninterest expense	0	10,654	19,375	31,989
Income from discontinued operations before income taxes	0	4,649	237,152	13,337
Income taxes from discontinued operations	0	1,173	59,353	3,373
Income from discontinued operations	$ 0	$ 3,476	$ 177,799	$ 9,964

Discontinued Operations - Sum_2

Discontinued Operations - Summary of Assets and Liabilities of Discontinued Operations on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Carrying amounts of assets included as part of discontinued operations:
Cash and due from banks		$ 200
Premises and equipment, net		308
Goodwill		49,633
Identifiable intangible assets, net		2,729
Operating lease right-of-use assets		2,431
Other assets		12,333
Assets of discontinued operations	$ 0	67,634
Carrying amounts of liabilities included as part of discontinued operations:
Operating lease liabilities		2,487
Other liabilities		9,540
Liabilities of discontinued operations	$ 0	$ 12,027

Securities Available for Sale_3

Securities Available for Sale and Held to Maturity - Amortized Cost and Estimated Fair Value of Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	$ 1,691,555	$ 1,959,007
Securities Available for Sale, Gross Unrealized Gains	51,523	37
Securities Available for Sale, Gross Unrealized (Losses)	(17,283)	(196,166)
Debt Securities, Available-for-sale	1,725,795	1,762,878
Securities Held to Maturity, Amortized Cost	1,358,358	1,426,279
Securities Held to Maturity, Gross Unrealized Gains	2,478	51
Securities Held to Maturity, Gross Unrealized (Losses)	(44,669)	(70,826)
Securities Held to Maturity, Estimated Fair Value	1,316,167	1,355,504
U.S. Treasury Securities [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	198,426	396,179
Securities Available for Sale, Gross Unrealized Gains	4,212	0
Securities Available for Sale, Gross Unrealized (Losses)	0	(23,811)
Debt Securities, Available-for-sale	202,638	372,368
Securities Held to Maturity, Amortized Cost	29,648	29,068
Securities Held to Maturity, Gross Unrealized Gains	232	0
Securities Held to Maturity, Gross Unrealized (Losses)	0	(26)
Securities Held to Maturity, Estimated Fair Value	29,880	29,042
U.S. Government Agency Obligations [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	19,494	6,207
Securities Available for Sale, Gross Unrealized Gains	0	1
Securities Available for Sale, Gross Unrealized (Losses)	(159)	(416)
Debt Securities, Available-for-sale	19,335	5,792
Securities Held to Maturity, Amortized Cost	0	0
Securities Held to Maturity, Gross Unrealized Gains	0	0
Securities Held to Maturity, Gross Unrealized (Losses)	0	0
Securities Held to Maturity, Estimated Fair Value	0	0
Obligations of States and Political Subdivisions [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost		0
Securities Available for Sale, Gross Unrealized Gains		0
Securities Available for Sale, Gross Unrealized (Losses)		0
Debt Securities, Available-for-sale		0
Securities Held to Maturity, Amortized Cost		340
Securities Held to Maturity, Gross Unrealized Gains		0
Securities Held to Maturity, Gross Unrealized (Losses)		0
Securities Held to Maturity, Estimated Fair Value		340
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	27,787	25,744
Securities Available for Sale, Gross Unrealized Gains	15	4
Securities Available for Sale, Gross Unrealized (Losses)	(2,004)	(2,613)
Debt Securities, Available-for-sale	25,798	23,135
Securities Held to Maturity, Amortized Cost	17,773	13,005
Securities Held to Maturity, Gross Unrealized Gains	3	0
Securities Held to Maturity, Gross Unrealized (Losses)	(407)	(497)
Securities Held to Maturity, Estimated Fair Value	17,369	12,508
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	1,086,688	1,338,256
Securities Available for Sale, Gross Unrealized Gains	32,970	32
Securities Available for Sale, Gross Unrealized (Losses)	(14,348)	(161,490)
Debt Securities, Available-for-sale	1,105,310	1,176,798
Securities Held to Maturity, Amortized Cost	436,177	469,593
Securities Held to Maturity, Gross Unrealized Gains	2,104	0
Securities Held to Maturity, Gross Unrealized (Losses)	(11,088)	(18,205)
Securities Held to Maturity, Estimated Fair Value	427,193	451,388
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	0	92,076
Securities Available for Sale, Gross Unrealized Gains	0	0
Securities Available for Sale, Gross Unrealized (Losses)	0	(6,002)
Debt Securities, Available-for-sale	0	86,074
Securities Held to Maturity, Amortized Cost	131,348	154,466
Securities Held to Maturity, Gross Unrealized Gains	0	0
Securities Held to Maturity, Gross Unrealized (Losses)	(6,179)	(10,113)
Securities Held to Maturity, Estimated Fair Value	125,169	144,353
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	359,160	100,545
Securities Available for Sale, Gross Unrealized Gains	14,326	0
Securities Available for Sale, Gross Unrealized (Losses)	(772)	(1,834)
Debt Securities, Available-for-sale	372,714	98,711
Securities Held to Maturity, Amortized Cost	743,412	759,807
Securities Held to Maturity, Gross Unrealized Gains	139	51
Securities Held to Maturity, Gross Unrealized (Losses)	(26,995)	(41,985)
Securities Held to Maturity, Estimated Fair Value	$ 716,556	$ 717,873

Securities Available for Sale_4

Securities Available for Sale and Held to Maturity - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Reclassification of Securities available for sale to securities held to maturity					$ 766,000,000
Net unrealized holding loss on AFS Securities at date of transfer					91,900,000
Net unrealized holding losses on AFS Securities, net of tax at date of transfer					$ 68,900,000
Net unamortized, unrealized loss on transfer of securities		$ 49,300,000		$ 57,600,000
Securities available for sale		1,725,795,000		1,762,878,000
Available for sale securities, average yield	4.85%
Gross realized gains	$ 182,800,000
Net unamortized, unrealized loss on transfer of securities, net of tax	(137,100,000)
Purchases of securities available for sale	1,378,000,000	1,475,357,000	$ 0
Credit loss recognized		0		0
Potential credit loss exposure				340,000
Expected credit losses, current.		0
Reserve for securities held to maturity		0		0
Securities held to maturity		1,358,358,000		1,426,279,000
Pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law		2,038,000,000		2,321,000,000
Pledged securities providing additional contingency funding		0		0
30 Days or More Past Due [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities held to maturity		0		0
Securities Available for Sale [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable		5,100,000		3,700,000
Securities Held to Maturity [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable		2,500,000		2,600,000
Held-to-maturity nonnaccrual		$ 0		$ 0
Investment Securities Portfolio [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities available for sale	$ 1,561,000,000
Available for sale securities, average yield	1.36%

Securities Available for Sale_5

Securities Available for Sale and Held to Maturity - Securities Held to Maturity by Credit Rating, as Determined by Moody's (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 1,358,358	$ 1,426,279
Aaa [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,358,358	1,425,939
Not Rated [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 0	$ 340

Securities Available for Sale_6

Securities Available for Sale and Held to Maturity - Securities with Gross Unrealized Losses, Segregated by Length of Impairment (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 48,557	$ 349,545
Gross Unrealized (Losses), Less than 12 Months	(282)	(3,485)
Estimated Fair Value, 12 Months or More	1,202,042	2,758,879
Gross Unrealized (Losses), 12 Months or More	(61,670)	(263,507)
Estimated Fair Value, Total	1,250,599	3,108,424
Gross Unrealized (Losses), Total	(61,952)	(266,992)
US Treasury Securities [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months		29,042
Gross Unrealized (Losses), Less than 12 Months		(26)
Estimated Fair Value, 12 Months or More		372,368
Gross Unrealized (Losses), 12 Months or More		(23,811)
Estimated Fair Value, Total		401,410
Gross Unrealized (Losses), Total		(23,837)
U.S. Government Agency Obligations [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	19,335	0
Gross Unrealized (Losses), Less than 12 Months	(159)	0
Estimated Fair Value, 12 Months or More	0	5,791
Gross Unrealized (Losses), 12 Months or More	0	(416)
Estimated Fair Value, Total	19,335	5,791
Gross Unrealized (Losses), Total	(159)	(416)
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	11,089	9,381
Gross Unrealized (Losses), Less than 12 Months	(51)	(172)
Estimated Fair Value, 12 Months or More	29,760	25,967
Gross Unrealized (Losses), 12 Months or More	(2,360)	(2,938)
Estimated Fair Value, Total	40,849	35,348
Gross Unrealized (Losses), Total	(2,411)	(3,110)
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	18,133	309,466
Gross Unrealized (Losses), Less than 12 Months	(72)	(3,274)
Estimated Fair Value, 12 Months or More	254,346	1,311,865
Gross Unrealized (Losses), 12 Months or More	(25,364)	(176,421)
Estimated Fair Value, Total	272,479	1,621,331
Gross Unrealized (Losses), Total	(25,436)	(179,695)
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	0	0
Gross Unrealized (Losses), Less than 12 Months	0	0
Estimated Fair Value, 12 Months or More	125,169	230,368
Gross Unrealized (Losses), 12 Months or More	(6,179)	(16,115)
Estimated Fair Value, Total	125,169	230,368
Gross Unrealized (Losses), Total	(6,179)	(16,115)
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	0	1,656
Gross Unrealized (Losses), Less than 12 Months	0	(13)
Estimated Fair Value, 12 Months or More	792,767	812,520
Gross Unrealized (Losses), 12 Months or More	(27,767)	(43,806)
Estimated Fair Value, Total	792,767	814,176
Gross Unrealized (Losses), Total	$ (27,767)	$ (43,819)

Securities Available for Sale_7

Securities Available for Sale and Held to Maturity - Gains and Losses as a Result of Calls and Disposition of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Proceeds From Calls And Sales Of Securities	$ 0	$ 0	$ 1,378,272	$ 0
Gross realized losses	$ 0	$ 0	$ (182,792)	$ 0

Securities Available for Sale_8

Securities Available for Sale and Held to Maturity - Contractual Maturities of Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities Available for Sale, Amortized Cost [Abstract]
Due in one year or less	$ 42,751
Due after one year through five years	75,223
Due after five years through ten years	99,946
Total amortized cost, before mortgage-backed securities	217,920
Mortgage-backed securities	1,473,635
Securities Available for Sale, Amortized Cost	1,691,555	$ 1,959,007
Securities Available for Sale, Estimated Fair Value [Abstract]
Due in one year or less	42,962
Due after one year through five years	76,656
Due after five years through ten years	102,355
Total fair value, before mortgage-backed securities	221,973
Mortgage-backed securities	1,503,822
Total	1,725,795	1,762,878
Securities Held to Maturity, Amortized Cost [Abstract]
Due in one year or less	0
Due after one year through five years	29,648
Due after five years through ten years	0
Total amortized cost, before mortgage-backed securities	29,648
Mortgage-backed securities	1,328,710
Securities Held to Maturity, Amortized Cost	1,358,358	1,426,279
Securities Held to Maturity, Estimated Fair Value [Abstract]
Due in one year or less	0
Due after one year through five years	29,880
Due after five years through ten years	0
Total fair value, before mortgage-backed securities	29,880
Mortgage-backed securities	1,286,287
Total	$ 1,316,167	$ 1,355,504

LHFI and ACL, LHFI - Loan Portf

LHFI and ACL, LHFI - Loan Portfolio Held for Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Loan Portfolio [Abstract]
Total LHFI	$ 13,100,111		$ 12,950,524
Less ACL, LHFI	157,929	$ 154,685	139,367	$ 134,031	$ 129,298	$ 120,214
Net LHFI	12,942,182		12,811,157
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	614,787		642,886
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	647,843		622,397
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	2,247,163		2,282,318
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	1,475,798		1,312,551
Other Construction [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	973,469		867,793
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	3,582,552		3,489,434
Less ACL, LHFI	36,287	41,136	24,043	23,298	20,376	19,488
Commercial and Industrial Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	1,767,079		1,922,910
Less ACL, LHFI	32,545	28,735	26,638	23,755	23,170	23,140
Consumer Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	152,611		165,734
Less ACL, LHFI	5,699	5,645	5,794	5,804	5,540	5,792
State and Other Political Subdivision Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	996,002		1,088,466
Less ACL, LHFI	1,166	625	646	665	676	885
Other Commercial Loans and Leases [Member]
Loan Portfolio [Abstract]
Total LHFI	642,807		556,035
Less ACL, LHFI	$ 6,728	$ 6,489	$ 7,072	$ 10,690	$ 5,607	$ 4,647

LHFI and ACL, LHFI - Additional

LHFI and ACL, LHFI - Additional Information (Details 1) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) Region	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accrued interest receivable | $	$ 69.6	$ 71
Maximum concentration of loan as a percentage of total LHFI	10%
Key market regions | Region	6

LHFI and ACL, LHFI - Schedule o

LHFI and ACL, LHFI - Schedule of Amortized Cost Basis of Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	$ 15,017	$ 27,092
Total Nonaccrual	73,825	100,008
Loans Past Due 90 Days or More Still Accruing	5,352	5,790
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL		2,020
Total Nonaccrual	362	2,642
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	870	946
Total Nonaccrual	6,168	6,518
Loans Past Due 90 Days or More Still Accruing	889	1,238
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	10,558	20,812
Total Nonaccrual	12,156	23,061
Loans Past Due 90 Days or More Still Accruing		54
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	1,989
Total Nonaccrual	2,122	158
Loans Past Due 90 Days or More Still Accruing		106
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	0
Total Nonaccrual	60	62
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	1,577	3,235
Total Nonaccrual	19,966	43,815
Loans Past Due 90 Days or More Still Accruing	4,019	3,740
Commercial and Industrial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	23	79
Total Nonaccrual	31,710	22,303
Loans Past Due 90 Days or More Still Accruing		24
Consumer Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Nonaccrual	243	243
Loans Past Due 90 Days or More Still Accruing	444	628
Other Commercial Loans and Leases [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Nonaccrual	$ 1,038	$ 1,206

LHFI and ACL, LHFI - Aging Anal

LHFI and ACL, LHFI - Aging Analysis of Past Due and Nonaccrual LHFI by Loan Type (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	$ 13,100,111	$ 12,950,524
30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	35,995	40,995
Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	15,091	13,898
Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	28,929	29,322
Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	80,015	84,215
Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	13,020,096	12,866,309
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	614,787	642,886
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	249	93
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	213	507
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	188	2,362
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	650	2,962
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	614,137	639,924
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	647,843	622,397
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	6,054	4,493
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,588	1,687
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	3,748	2,716
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	12,390	8,896
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	635,453	613,501
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,247,163	2,282,318
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	18,517	19,298
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	7,316	9,327
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	14,313	22,164
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	40,146	50,789
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,207,017	2,231,529
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	3,582,552	3,489,434
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,137	1,531
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	3,917	1,063
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	793	727
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	6,847	3,321
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	3,575,705	3,486,113
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,475,798	1,312,551
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	518	126
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	0
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	28	207
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	546	333
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,475,252	1,312,218
Commercial and Industrial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,767,079	1,922,910
Commercial and Industrial Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	4,221	11,881
Commercial and Industrial Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	421	484
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	9,391	499
Commercial and Industrial Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	14,033	12,864
Commercial and Industrial Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,753,046	1,910,046
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	973,469	867,793
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	60	62
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	60	62
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	973,409	867,731
Consumer Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	152,611	165,734
Consumer Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,788	2,112
Consumer Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	628	772
Consumer Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	448	647
Consumer Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,864	3,531
Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	149,747	162,203
State and Other Political Subdivision Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	996,002	1,088,466
State and Other Political Subdivision Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	44	152
State and Other Political Subdivision Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	0
State and Other Political Subdivision Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	0
State and Other Political Subdivision Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	44	152
State and Other Political Subdivision Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	995,958	1,088,314
Other Commercial Loans and Leases [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	642,807	556,035
Other Commercial Loans and Leases [Member] | 30 Days or More Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,407	1,247
Other Commercial Loans and Leases [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	8	58
Other Commercial Loans and Leases [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	20	0
Other Commercial Loans and Leases [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,435	1,305
Other Commercial Loans and Leases [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	$ 640,372	$ 554,730

LHFI and ACL, LHFI - Impact of

LHFI and ACL, LHFI - Impact of Modifications Classified as Troubled Debt Restructurings (Details) - Troubled Debt Restructurings [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 916	$ 442	$ 2,668	$ 1,847
Pre-Modification Outstanding Recorded Investment	6,207		6,207	371
Post-Modification Outstanding Recorded Investment	$ 7,123	$ 442	$ 8,875	$ 2,218
% of Total Class of Loan	0.05%	0%	0.07%	0.02%
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 886	$ 96	$ 2,638	$ 494
Post-Modification Outstanding Recorded Investment	$ 886	$ 96	$ 2,638	$ 494
% of Total Class of Loan	0.14%	0.02%	0.41%	0.08%
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 370
Post-Modification Outstanding Recorded Investment				$ 370
% of Total Class of Loan				0.01%
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 30	$ 346	$ 30	$ 912
Post-Modification Outstanding Recorded Investment	$ 30	$ 346	$ 30	$ 912
% of Total Class of Loan	0%	0.02%	0%	0.04%
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Pre-Modification Outstanding Recorded Investment	$ 6,207		$ 6,207	$ 255
Post-Modification Outstanding Recorded Investment	$ 6,207		$ 6,207	$ 255
% of Total Class of Loan	0.35%		0.35%	0.01%
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 40
Post-Modification Outstanding Recorded Investment				$ 40
% of Total Class of Loan				0.02%
Other Commercial Loans and Leases [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis				$ 31
Pre-Modification Outstanding Recorded Investment				116
Post-Modification Outstanding Recorded Investment				$ 147
% of Total Class of Loan				0.03%

LHFI and ACL, LHFI - Troubled d

LHFI and ACL, LHFI - Troubled debt restructurings on financial effect (Details) - Troubled Debt Restructurings [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Financial Effect				One loan renewed and extended maturity by six months
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Financial Effect	Modified one loan to amortize over 24 month term	Extended amortization on loans with term adjusted by weighted-average 10.6 years	Modified one loan to amortize over 24 month term	Extended amortization with term adjusted by weighted-average 3.2 years
Weighted average amortization period		10 years 7 months 6 days		3 years 2 months 12 days
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Financial Effect	Modified two loans and seven lines of credit to amortize over 24 month terms	Modified lines of credit to amortize over 12 month and 24 month terms	Modified three loans and twenty-seven lines to amortize over 24 month terms	Modified lines of credit to amortize over 12 month and 24 month terms
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Payment Concessions	Thirty-four month principal payment deferral		Thirty-four month principal payment deferral	Six month payment deferrals
Other Commercial Loans and Leases [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Financial Effect				One loan renewed and extended maturity by seven months
Term Extension - Payment Concessions				Six month payment deferral
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Term Extension - Financial Effect				Bankruptcies extended amortization with term adjusted by weighted average 1.3 years reducing borrower payment
Weighted average amortization period				1 year 3 months 18 days

LHFI and ACL, LHFI - Past Due M

LHFI and ACL, LHFI - Past Due Modifications Related To Loans Held For Investment (Details) - Troubled Debt Restructurings [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable Modifications [Line Items]
Total	$ 7,123	$ 442	$ 8,875	$ 2,218
30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	114	462
Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	50	0
Past Due 90 Days or More [Member]
Financing Receivable Modifications [Line Items]
Total			42
Past Due
Financing Receivable Modifications [Line Items]
Total	0	0	206	462
Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	7,123	442	8,669	1,756
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total				370
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total				0
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total				0
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total				0
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total				370
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	30	346	30	912
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	0	170
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	0	0
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total	0	0	0	170
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	30	346	30	742
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Total	6,207		6,207	255
Commercial and Industrial Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total			0	0
Commercial and Industrial Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0		0	0
Commercial and Industrial Loans [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total	0		0	0
Commercial and Industrial Loans [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	6,207		6,207	255
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Total				40
Consumer Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	0			20
Consumer Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total				0
Consumer Loans [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total				20
Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total				20
Other Commercial Loans and Leases [Member]
Financing Receivable Modifications [Line Items]
Total				147
Other Commercial Loans and Leases [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total				0
Other Commercial Loans and Leases [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total				0
Other Commercial Loans and Leases [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total				0
Other Commercial Loans and Leases [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total				147
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	886	96	2,638	494
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	114	272
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	0	0	50	0
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Modifications [Line Items]
Total			42
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member] | Past Due
Financing Receivable Modifications [Line Items]
Total	0	0	206	272
Other Residential Financing Receivable [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	$ 886	$ 96	$ 2,432	$ 222

LHFI and ACL, LHFI - Schedule_2

LHFI and ACL, LHFI - Schedule of Amortized Cost Basis of Collateral-Dependent Loans by Class of Loans and Collateral Type (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	$ 45,540	$ 49,082
Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	14,994	27,051
Vehicles [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	2,086	41
Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	28,460	21,990
Construction, Land Development and Other Land [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans		2,020
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans		2,020
Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	870	946
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	870	946
Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	10,558	20,812
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	10,558	20,812
Other Real Estate Secured [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,989
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,989
Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,577	3,235
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,577	3,235
Commercial and Industrial Loans [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	29,640	21,102
Commercial and Industrial Loans [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	0	38
Commercial and Industrial Loans [Member] | Vehicles [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	2,086	41
Commercial and Industrial Loans [Member] | Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	27,554	21,023
Other Commercial Loans and Leases [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	906	967
Other Commercial Loans and Leases [Member] | Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	$ 906	$ 967

LHFI and ACL, LHFI - Addition_2

LHFI and ACL, LHFI - Additional Information (Details 2) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) KeyRatio	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Financing Receivable Recorded Investment [Line Items]
Number of days used as baseline in evaluating collateral documentation exceptions for loan policy			90 days
Number of key quality ratios | KeyRatio			6
Exposure for commercial non accrual loans to be reviewed on individual basis	$ 500		$ 500
LHFS past due 90 days or more	63,700		$ 63,700		$ 51,200
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program			100%
Exposure for Modified Commercial Accrual Loans Deemed To Be Reviewed On Individual Basis	500		$ 500
Other Real Estate Secured [Member]
Financing Receivable [Abstract]
PCL				$ 1,200
Troubled Debt Restructurings [Member]
Financing Receivable Recorded Investment [Line Items]
Amortized Cost Basis	916	$ 442	2,668	1,847
Other Construction [Member]
Financing Receivable [Abstract]
PCL		4,600		5,400
Other Commercial Loans and Leases Financing Receivable [Member] | Troubled Debt Restructurings [Member]
Financing Receivable Recorded Investment [Line Items]
Amortized Cost Basis				31
Loans Held for Investment [Member]
Financing Receivable [Abstract]
PCL	7,923	$ 8,322	30,327	$ 19,777
Minimum [Member]
Financing Receivable [Abstract]
Credit amount used as baseline in evaluating loan policy	$ 100		$ 100

LHFI and ACL, LHFI - Summary of

LHFI and ACL, LHFI - Summary of Amortized Cost Basis of Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	$ 1,980,709	$ 2,557,360
Term Loans by Origination Year, Before Latest Fiscal Year	2,087,863	3,821,836
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	3,596,016	2,060,977
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	1,721,390	1,267,991
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,046,108	662,502
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,310,685	1,121,424
Financing Receivable, Revolving Loans	1,357,340	1,458,434
Total LHFI	13,100,111	12,950,524
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(4,569)	(6,345)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(907)	(2,951)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(12,997)	(4,601)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(3,113)	(313)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(189)	(353)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,355)	(417)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,089)	(2,535)
Total LHFI, Current Period Gross Charge-Offs	(27,219)	(17,515)
Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	28,929	29,322
Commercial and Industrial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	1,767,079	1,922,910
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	9,391	499
State and Other Political Subdivision Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	996,002	1,088,466
State and Other Political Subdivision Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	0	0
Other Commercial Loans and Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	642,807	556,035
Other Commercial Loans and Leases [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	20	0
Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	152,611	165,734
Consumer Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	448	647
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	614,787	642,886
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	647,843	622,397
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	1,475,798	1,312,551
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	3,582,552	3,489,434
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	793	727
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	973,469	867,793
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	2,247,163	2,282,318
Commercial LHFI [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	1,714,622	2,158,477
Term Loans by Origination Year, Before Latest Fiscal Year	1,769,413	2,846,360
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	2,717,168	1,503,578
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	1,225,876	1,071,603
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	870,781	555,406
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	967,289	821,512
Financing Receivable, Revolving Loans	848,346	973,511
Total LHFI	10,113,495	9,930,447
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(128)	(143)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(85)	(1,362)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(2,952)	(4,208)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(2,873)	(164)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(86)	(342)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,188)	(252)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(85)	(7)
Total LHFI, Current Period Gross Charge-Offs	(9,397)	(6,478)
Commercial LHFI [Member] | Commercial and Industrial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	391,604	515,103
Term Loans by Origination Year, Before Latest Fiscal Year	382,569	501,808
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	337,149	175,718
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	115,586	93,985
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	53,370	32,026
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	45,621	45,077
Financing Receivable, Revolving Loans	441,180	559,193
Total LHFI	1,767,079	1,922,910
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(128)	(42)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(85)	(1,071)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(430)	(700)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(461)	(138)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(86)	(95)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,111)	(108)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(85)	(7)
Total LHFI, Current Period Gross Charge-Offs	(4,386)	(2,161)
Commercial LHFI [Member] | Commercial and Industrial Loans [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	383,881	497,730
Term Loans by Origination Year, Before Latest Fiscal Year	380,031	474,737
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	265,702	158,659
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	102,706	80,646
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	52,400	31,876
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	45,251	44,972
Financing Receivable, Revolving Loans	406,087	537,527
Total LHFI	1,636,058	1,826,147
Commercial LHFI [Member] | Commercial and Industrial Loans [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year		12,570
Term Loans by Origination Year, Before Latest Fiscal Year	615	10,141
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	14,201	3,149
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	52	1,381
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		110
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year
Financing Receivable, Revolving Loans	18,877	126
Total LHFI	33,745	27,477
Commercial LHFI [Member] | Commercial and Industrial Loans [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	7,496	4,797
Term Loans by Origination Year, Before Latest Fiscal Year	1,923	16,872
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	57,073	13,909
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	12,683	11,958
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	970	40
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	367	80
Financing Receivable, Revolving Loans	16,216	21,528
Total LHFI	96,728	69,184
Commercial LHFI [Member] | Commercial and Industrial Loans [Member] | Doubtful - RR 9 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	227	6
Term Loans by Origination Year, Before Latest Fiscal Year
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	173	1
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	145
Term Loans by Origination Year, Four Years Before Latest Fiscal Year
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3	25
Financing Receivable, Revolving Loans		12
Total LHFI	548	102
Commercial LHFI [Member] | State and Other Political Subdivision Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	55,360	152,157
Term Loans by Origination Year, Before Latest Fiscal Year	121,591	247,034
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	244,434	174,812
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	157,287	99,786
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	83,156	32,118
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	331,105	377,225
Financing Receivable, Revolving Loans	3,069	5,334
Total LHFI	996,002	1,088,466
Commercial LHFI [Member] | State and Other Political Subdivision Loans [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	55,360	152,157
Term Loans by Origination Year, Before Latest Fiscal Year	121,591	247,034
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	244,434	174,812
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	157,287	99,786
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	83,156	32,118
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	331,105	377,225
Financing Receivable, Revolving Loans	3,069	5,334
Total LHFI	996,002	1,088,466
Commercial LHFI [Member] | Other Commercial Loans and Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	146,721	211,508
Term Loans by Origination Year, Before Latest Fiscal Year	180,021	49,158
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	20,174	30,113
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	32,326	21,585
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	17,013	32,837
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	32,572	8,488
Financing Receivable, Revolving Loans	213,980	202,346
Total LHFI	642,807	556,035
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year		(40)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year		(248)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(28)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year		(26)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(25)
Total LHFI, Current Period Gross Charge-Offs	(53)	(314)
Commercial LHFI [Member] | Other Commercial Loans and Leases [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	145,848	211,402
Term Loans by Origination Year, Before Latest Fiscal Year	179,925	48,947
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	19,906	30,071
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	32,234	21,377
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	17,013	32,837
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	32,572	8,468
Financing Receivable, Revolving Loans	212,999	201,339
Total LHFI	640,497	554,441
Commercial LHFI [Member] | Other Commercial Loans and Leases [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	140
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	70	208
Financing Receivable, Revolving Loans		20
Total LHFI	210	228
Commercial LHFI [Member] | Other Commercial Loans and Leases [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	873	106
Term Loans by Origination Year, Before Latest Fiscal Year	96	211
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	128	42
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	22
Financing Receivable, Revolving Loans	981	987
Total LHFI	2,100	1,346
Commercial LHFI [Member] | Other Commercial Loans and Leases [Member] | Doubtful - RR 9 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		20
Total LHFI		20
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	316,003	360,419
Term Loans by Origination Year, Before Latest Fiscal Year	116,700	99,078
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	39,987	36,967
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	25,444	10,610
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	8,488	2,036
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,409	2,006
Financing Receivable, Revolving Loans	42,804	52,351
Total LHFI	551,835	563,467
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year		(4)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year		(10)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year		(228)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(24)
Total LHFI, Current Period Gross Charge-Offs	(24)	(242)
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	313,423	359,813
Term Loans by Origination Year, Before Latest Fiscal Year	115,646	98,742
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	39,923	35,095
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	25,444	10,591
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	8,471	2,036
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,409	1,961
Financing Receivable, Revolving Loans	42,086	52,351
Total LHFI	547,402	560,589
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	2,575
Term Loans by Origination Year, Before Latest Fiscal Year	989
Term Loans by Origination Year, Two Years Before Latest Fiscal Year		360
Financing Receivable, Revolving Loans	553
Total LHFI	4,117	360
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	5	606
Term Loans by Origination Year, Before Latest Fiscal Year	65	336
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	64	1,512
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		19
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	17
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		21
Financing Receivable, Revolving Loans	165
Total LHFI	316	2,494
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Doubtful - RR 9 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		24
Total LHFI		24
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	23,773	33,292
Term Loans by Origination Year, Before Latest Fiscal Year	26,299	31,467
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	24,499	29,364
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	25,641	14,341
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	12,086	8,164
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	4,006	3,128
Financing Receivable, Revolving Loans	7,889	10,175
Total LHFI	124,193	129,931
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year		(24)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(12)	(6)
Total LHFI, Current Period Gross Charge-Offs	(12)	(30)
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	23,695	33,072
Term Loans by Origination Year, Before Latest Fiscal Year	25,412	30,760
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	23,921	29,159
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	25,271	14,309
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	12,086	8,084
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3,804	2,822
Financing Receivable, Revolving Loans	7,859	10,077
Total LHFI	122,048	128,283
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	27
Term Loans by Origination Year, Before Latest Fiscal Year		82
Term Loans by Origination Year, Two Years Before Latest Fiscal Year		48
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	36	10
Total LHFI	63	140
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	51	220
Term Loans by Origination Year, Before Latest Fiscal Year	887	625
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	578	157
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	334	22
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		80
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	202	306
Financing Receivable, Revolving Loans	30	98
Total LHFI	2,082	1,508
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	183,283	194,309
Term Loans by Origination Year, Before Latest Fiscal Year	97,427	463,340
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	675,380	332,818
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	302,584	210,047
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	139,288	91,905
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	69,709	11,119
Financing Receivable, Revolving Loans	7,887	8,880
Total LHFI	1,475,558	1,312,418
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	168,609	194,141
Term Loans by Origination Year, Before Latest Fiscal Year	97,427	447,200
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	649,069	332,818
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	260,090	209,757
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	139,030	56,024
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	44,283	11,080
Financing Receivable, Revolving Loans	7,461	8,880
Total LHFI	1,365,969	1,259,900
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year		126
Term Loans by Origination Year, Before Latest Fiscal Year		2,076
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	25,348
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	27,448
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		35,881
Financing Receivable, Revolving Loans	426
Total LHFI	53,222	38,083
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	14,632
Term Loans by Origination Year, Before Latest Fiscal Year		14,064
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	963
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	15,046	290
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	258
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	25,426	39
Total LHFI	56,325	14,393
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Doubtful - RR 9 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	42	42
Total LHFI	42	42
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	507,484	511,951
Term Loans by Origination Year, Before Latest Fiscal Year	423,306	936,413
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	1,026,688	573,903
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	503,383	607,187
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	538,201	356,320
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	481,867	374,463
Financing Receivable, Revolving Loans	101,623	129,190
Total LHFI	3,582,552	3,489,427
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year		(39)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year		(82)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(2,412)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year		(19)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(16)	(138)
Total LHFI, Current Period Gross Charge-Offs	(2,428)	(278)
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	498,807	501,327
Term Loans by Origination Year, Before Latest Fiscal Year	416,459	919,519
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	936,901	526,412
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	475,161	596,240
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	481,754	323,687
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	420,554	369,250
Financing Receivable, Revolving Loans	101,623	129,142
Total LHFI	3,331,259	3,365,577
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year		4,271
Term Loans by Origination Year, Before Latest Fiscal Year		14,930
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	55,301
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		138
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	32,937	23,966
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3,400
Total LHFI	91,638	43,305
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	8,664	6,332
Term Loans by Origination Year, Before Latest Fiscal Year	6,847	1,964
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	34,486	47,491
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	28,222	10,809
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	23,510	8,614
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	57,905	5,200
Financing Receivable, Revolving Loans		48
Total LHFI	159,634	80,458
Commercial LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Doubtful - RR 9 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	13	21
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		53
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	8	13
Total LHFI	21	87
Commercial LHFI [Member] | Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	90,394	179,738
Term Loans by Origination Year, Before Latest Fiscal Year	421,500	518,062
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	348,857	149,883
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	63,625	14,062
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	19,179
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		6
Financing Receivable, Revolving Loans	29,914	6,042
Total LHFI	973,469	867,793
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year		(61)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(2,494)	(3,392)
Total LHFI, Current Period Gross Charge-Offs	(2,494)	(3,453)
Commercial LHFI [Member] | Other Loans Secured by Real Estate [Member] | Other Construction [Member] | Pass - RR 1 through RR 6 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	90,334	179,676
Term Loans by Origination Year, Before Latest Fiscal Year	421,500	518,062
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	305,414	149,883
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	54,232	14,062
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		6
Financing Receivable, Revolving Loans	29,914	6,042
Total LHFI	901,394	867,731
Commercial LHFI [Member] | Other Loans Secured by Real Estate [Member] | Other Construction [Member] | Special Mention - RR 7 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	43,443
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	9,393
Total LHFI	52,836
Commercial LHFI [Member] | Other Loans Secured by Real Estate [Member] | Other Construction [Member] | Substandard - RR 8 [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	60	62
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	19,179
Total LHFI	19,239	62
Consumer LHFI [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	266,087	398,883
Term Loans by Origination Year, Before Latest Fiscal Year	318,450	975,476
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	878,848	557,399
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	495,514	196,388
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	175,327	107,096
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	343,396	299,912
Financing Receivable, Revolving Loans	508,994	484,923
Total LHFI	2,986,616	3,020,077
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(4,441)	(6,202)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(822)	(1,589)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(10,045)	(393)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(240)	(149)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(103)	(11)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(167)	(165)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,004)	(2,528)
Total LHFI, Current Period Gross Charge-Offs	(17,822)	(11,037)
Consumer LHFI [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	46,804	60,878
Term Loans by Origination Year, Before Latest Fiscal Year	28,239	33,351
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	15,876	10,919
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,655	2,665
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,484	922
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	243	299
Financing Receivable, Revolving Loans	54,310	56,700
Total LHFI	152,611	165,734
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(4,413)	(6,138)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(650)	(559)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(373)	(167)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(94)	(43)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(88)	(1)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year		(1)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,004)	(2,381)
Total LHFI, Current Period Gross Charge-Offs	(7,622)	(9,290)
Consumer LHFI [Member] | Consumer Loans [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	46,034	59,496
Term Loans by Origination Year, Before Latest Fiscal Year	27,761	32,767
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	15,546	10,698
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,548	2,604
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,460	917
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	235	294
Financing Receivable, Revolving Loans	52,980	55,321
Total LHFI	149,564	162,097
Consumer LHFI [Member] | Consumer Loans [Member] | Past Due 30-89 Days [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	697	1,274
Term Loans by Origination Year, Before Latest Fiscal Year	422	475
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	238	134
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	40	34
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1	5
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	8	5
Financing Receivable, Revolving Loans	954	839
Total LHFI	2,360	2,766
Consumer LHFI [Member] | Consumer Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	49	64
Term Loans by Origination Year, Before Latest Fiscal Year	26	44
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	15	3
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		1
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	0
Financing Receivable, Revolving Loans	353	516
Total LHFI	443	628
Consumer LHFI [Member] | Consumer Loans [Member] | Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	24	44
Term Loans by Origination Year, Before Latest Fiscal Year	30	65
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	77	84
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	67	26
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	23
Financing Receivable, Revolving Loans	23	24
Total LHFI	244	243
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	21,981	44,912
Term Loans by Origination Year, Before Latest Fiscal Year	27,992	23,360
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	4,853	6,121
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	3,739	1,203
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,079	1,112
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,133	2,058
Financing Receivable, Revolving Loans	1,175	653
Total LHFI	62,952	79,419
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(8)
Total LHFI, Current Period Gross Charge-Offs	(8)
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	21,981	44,912
Term Loans by Origination Year, Before Latest Fiscal Year	27,681	23,110
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	4,712	5,973
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	3,735	1,203
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,079	1,082
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,076	1,864
Financing Receivable, Revolving Loans	1,175	653
Total LHFI	62,439	78,797
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Past Due 30-89 Days [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Before Latest Fiscal Year	311	250
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	118
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		30
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	32	191
Total LHFI	461	471
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	23	148
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	25	3
Total LHFI	52	151
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	21,702	29,869
Term Loans by Origination Year, Before Latest Fiscal Year	20,554	11,774
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	7,662	5,855
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,478	4,483
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	3,900	4,364
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	10,845	8,551
Financing Receivable, Revolving Loans	453,509	427,570
Total LHFI	523,650	492,466
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(28)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(29)	(100)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(206)	(9)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(40)	(2)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(14)	(10)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(52)	(22)
Financing Receivable, Revolving, Current Period Gross Charge-Offs		(147)
Total LHFI, Current Period Gross Charge-Offs	(369)	(290)
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	19,886	29,636
Term Loans by Origination Year, Before Latest Fiscal Year	20,261	11,366
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	7,529	5,733
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,367	4,471
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	3,747	4,313
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	9,421	7,674
Financing Receivable, Revolving Loans	444,331	417,383
Total LHFI	510,542	480,576
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Past Due 30-89 Days [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	1,726	225
Term Loans by Origination Year, Before Latest Fiscal Year	264	68
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	59	74
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	65	4
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	49	51
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	676	220
Financing Receivable, Revolving Loans	4,060	4,292
Total LHFI	6,899	4,934
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	55
Term Loans by Origination Year, Before Latest Fiscal Year		264
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	8
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	162	41
Financing Receivable, Revolving Loans	615	934
Total LHFI	840	1,239
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	35	8
Term Loans by Origination Year, Before Latest Fiscal Year	29	76
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	66	48
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	46	8
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	104
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	586	616
Financing Receivable, Revolving Loans	4,503	4,961
Total LHFI	5,369	5,717
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	136
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		78
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	70
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	34	55
Total LHFI	240	133
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	136
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		78
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	70
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	34	55
Total LHFI	240	133
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Two Years Before Latest Fiscal Year		7
Total LHFI		7
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Two Years Before Latest Fiscal Year		7
Total LHFI		7
Consumer LHFI [Member] | Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	175,464	263,224
Term Loans by Origination Year, Before Latest Fiscal Year	241,665	906,991
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	850,457	534,497
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	480,642	187,959
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	168,794	100,698
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	330,141	288,949
Total LHFI	2,247,163	2,282,318
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year		(64)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(143)	(930)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(9,466)	(217)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(106)	(104)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(1)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(107)	(142)
Total LHFI, Current Period Gross Charge-Offs	(9,823)	(1,457)
Consumer LHFI [Member] | Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	174,559	258,800
Term Loans by Origination Year, Before Latest Fiscal Year	234,420	878,893
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	827,385	516,324
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	471,999	180,272
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	166,513	98,552
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	325,051	277,664
Total LHFI	2,199,927	2,210,505
Consumer LHFI [Member] | Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Past Due 30-89 Days [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	632	3,370
Term Loans by Origination Year, Before Latest Fiscal Year	4,345	11,293
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	10,101	5,513
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,510	2,121
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	850	298
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,815	1,664
Total LHFI	23,253	24,259
Consumer LHFI [Member] | Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	273	376
Term Loans by Origination Year, Before Latest Fiscal Year	828	1,219
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	2,359	1,208
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	327	682
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	198
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	34	255
Total LHFI	4,019	3,740
Consumer LHFI [Member] | Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	0	678
Term Loans by Origination Year, Before Latest Fiscal Year	2,072	15,586
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	10,612	11,452
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	2,806	4,884
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,233	1,848
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3,241	9,366
Total LHFI	$ 19,964	$ 43,814

LHFI and ACL, LHFI - Summary _2

LHFI and ACL, LHFI - Summary of Trustmark's Portfolio Segments, Loan Classes, Loan Pools and the ACL Methodology and Loss Drivers (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | 1 -4 Family Residential Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Prime Rate, National GDP
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Lots and Development [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Prime Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Unimproved Land [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Prime Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | All Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Southern Unemployment
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | All Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Southern Unemployment
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Consumer 1-4 Family - 1st Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Prime Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member] | Nonresidential Owner- Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Southern Unemployment, National CRE Price Index	Southern Unemployment, National GDP
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonresidential Owner- Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Southern Unemployment, National CRE Price Index	Southern Unemployment, National GDP
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonowner-Occupied - Hotel/Motel [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonowner-Occupied - Office [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonowner-Occupied- Retail [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonowner-Occupied- Senior Living/ Nursing Homes [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member] | Nonowner-occupied - All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Nonresidential Owner- Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Southern Unemployment, National CRE Price Index	Southern Unemployment, National GDP
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Nonowner-occupied - All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member] | Nonresidential Nonowner- Occupied - Apartments [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, Southern Unemployment	Southern Vacancy Rate, Southern Unemployment
Commercial and Industrial Loans [Member] | Commercial and Industrial Loans [Member] | Commercial and Industrial - Non-Working Capital [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Trustmark historical data	Trustmark historical data
Commercial and Industrial Loans [Member] | Commercial and Industrial Loans [Member] | Commercial and Industrial - Working Capital [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Trustmark historical data	Trustmark historical data
Commercial and Industrial Loans [Member] | Commercial and Industrial Loans [Member] | Equipment Finance Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	WARM	WARM
Loss Drivers	Southern Unemployment, National GDP	Southern Unemployment, Southern GDP
Commercial and Industrial Loans [Member] | Commercial and Industrial Loans [Member] | Credit Cards [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	WARM	WARM
Loss Drivers	Trustmark call report data	Trustmark call report data
Other Loans Secured by Real Estate [Member] | Other Construction [Member] | Other Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National CRE Price Index, National Unemployment, BBB 7-10 US CBI	Prime Rate, National Unemployment
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Trustmark Mortgage [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	WARM	WARM
Loss Drivers	Southern Unemployment	Southern Unemployment
Consumer Loans [Member] | Consumer Loans [Member] | All Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	National HPI, National Unemployment	Southern Unemployment
Consumer Loans [Member] | Consumer Loans [Member] | Credit Cards [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	WARM	WARM
Loss Drivers	Trustmark call report data	Trustmark call report data
Consumer Loans [Member] | Consumer Loans [Member] | Overdrafts [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	Loss Rate	Loss Rate
Loss Drivers	Trustmark historical data	Trustmark historical data
State and Other Political Subdivision Loans [Member] | State and Other Political Subdivision Loans [Member] | Obligations of State and Political Subdivisions [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Moody's Bond Default Study	Moody's Bond Default Study
Other Commercial Loans and Leases [Member] | Other Commercial Loans And Leases [Member] | Commercial and Industrial - Non-Working Capital [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Trustmark historical data	Trustmark historical data
Other Commercial Loans and Leases [Member] | Other Commercial Loans And Leases [Member] | Commercial and Industrial - Working Capital [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	Trustmark historical data	Trustmark historical data
Other Commercial Loans and Leases [Member] | Other Commercial Loans And Leases [Member] | Equipment Finance Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	WARM	WARM
Loss Drivers	Southern Unemployment, National GDP	Southern Unemployment, Southern GDP
Other Commercial Loans and Leases [Member] | Other Commercial Loans And Leases [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Methodology	DCF	DCF
Loss Drivers	BBB 7-10 US CBI, Southern Unemployment	Prime Rate, Southern Unemployment

LHFI and ACL, LHFI - Summary _3

LHFI and ACL, LHFI - Summary of Balance in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	$ 17,286		$ 12,403
Individually Evaluated for Credit Loss	45,540		49,082
Collectively Evaluated for Credit Loss	140,643		126,964
Collectively Evaluated for Credit Loss	13,054,571		12,901,442
Total LHFI	13,100,111		12,950,524
Total	157,929	$ 154,685	139,367	$ 134,031	$ 129,298	$ 120,214
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	16,390		11,436
Individually Evaluated for Credit Loss	29,640		21,102
Collectively Evaluated for Credit Loss	16,155		15,202
Collectively Evaluated for Credit Loss	1,737,439		1,901,808
Total LHFI	1,767,079		1,922,910
Total	32,545	28,735	26,638	23,755	23,170	23,140
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Collectively Evaluated for Credit Loss	5,699		5,794
Collectively Evaluated for Credit Loss	152,611		165,734
Total LHFI	152,611		165,734
Total	5,699	5,645	5,794	5,804	5,540	5,792
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss			0
Individually Evaluated for Credit Loss			0
Collectively Evaluated for Credit Loss	1,166		646
Collectively Evaluated for Credit Loss	996,002		1,088,466
Total LHFI	996,002		1,088,466
Total	1,166	625	646	665	676	885
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	896		967
Individually Evaluated for Credit Loss	906		967
Collectively Evaluated for Credit Loss	5,832		6,105
Collectively Evaluated for Credit Loss	641,901		555,068
Total LHFI	642,807		556,035
Total	6,728	6,489	7,072	10,690	5,607	4,647
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss			0
Individually Evaluated for Credit Loss			2,020
Collectively Evaluated for Credit Loss	6,121		17,192
Collectively Evaluated for Credit Loss	614,787		640,866
Total LHFI	614,787		642,886
Total	6,121	5,101	17,192	17,241	15,343	12,828
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	870		946
Collectively Evaluated for Credit Loss	10,729		12,942
Collectively Evaluated for Credit Loss	646,973		621,451
Total LHFI	647,843		622,397
Total	10,729	10,373	12,942	12,563	12,173	12,374
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	10,558		20,812
Collectively Evaluated for Credit Loss	36,287		24,043
Collectively Evaluated for Credit Loss	3,571,994		3,468,622
Total LHFI	3,582,552		3,489,434
Total	36,287	41,136	24,043	23,298	20,376	19,488
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	1,989
Individually Evaluated for Credit Loss			0
Collectively Evaluated for Credit Loss	13,071		4,488
Collectively Evaluated for Credit Loss	1,473,809		1,312,551
Total LHFI	1,475,798		1,312,551
Total	13,071	12,037	4,488	3,565	3,481	4,743
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss			0
Individually Evaluated for Credit Loss			0
Collectively Evaluated for Credit Loss	13,841		5,758
Collectively Evaluated for Credit Loss	973,469		867,793
Total LHFI	973,469		867,793
Total	13,841	13,897	5,758	6,306	14,377	15,132
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	1,577		3,235
Collectively Evaluated for Credit Loss	31,742		34,794
Collectively Evaluated for Credit Loss	2,245,586		2,279,083
Total LHFI	2,247,163		2,282,318
Total	$ 31,742	$ 30,647	$ 34,794	$ 30,144	$ 28,555	$ 21,185

LHFI and ACL, LHFI - Change in

LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 154,685	$ 129,298	$ 139,367	$ 120,214
Loans charged-off	(7,142)	(7,496)	(18,586)	(13,265)
Loans charged-off	(7,142)	(7,496)	(27,219)	(13,265)
Recoveries	2,463	3,907	6,821	7,305
Net (charge-offs) recoveries	(4,679)	(3,589)	(20,398)	(5,960)
PCL, LHFI	7,923	8,322	38,960	19,777
Balance at end of period	157,929	134,031	157,929	134,031
Loans Held for Investment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
PCL, LHFI	7,923	8,322	30,327	19,777
1-4 Family Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans charged-off	0	0	(8,633)	0
PCL, LHFI	0	0	8,633	0
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	28,735	23,170	26,638	23,140
Loans charged-off	(3,611)	(635)	(4,386)	(1,562)
Recoveries	193	267	663	754
PCL, LHFI	7,228	953	9,630	1,423
Balance at end of period	32,545	23,755	32,545	23,755
Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
PCL, LHFI		4,600		5,400
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,645	5,540	5,794	5,792
Loans charged-off	(2,690)	(2,421)	(7,622)	(6,565)
Recoveries	1,496	1,337	4,448	3,875
PCL, LHFI	1,248	1,348	3,079	2,702
Balance at end of period	5,699	5,804	5,699	5,804
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	625	676	646	885
Loans charged-off	0	0	0
Recoveries	0	0	0
PCL, LHFI	541	(11)	520	(220)
Balance at end of period	1,166	665	1,166	665
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	6,489	5,607	7,072	4,647
Loans charged-off	0	(9)	(53)	(32)
Recoveries	0	0	52	0
PCL, LHFI	239	(5,092)	(343)	6,075
Balance at end of period	6,728	10,690	6,728	10,690
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,101	15,343	17,192	12,828
Loans charged-off	(8)	(228)	(32)	(242)
Recoveries	614	22	622	94
PCL, LHFI	414	2,104	(11,661)	4,561
Balance at end of period	6,121	17,241	6,121	17,241
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	10,373	12,173	12,942	12,374
Loans charged-off	(201)	(110)	(381)	(230)
Recoveries	55	43	568	165
PCL, LHFI	502	457	(2,400)	254
Balance at end of period	10,729	12,563	10,729	12,563
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	41,136	20,376	24,043	19,488
Loans charged-off	0	(192)	(2,428)	(278)
Recoveries	20	2,216	46	2,322
PCL, LHFI	(4,869)	898	14,626	1,766
Balance at end of period	36,287	23,298	36,287	23,298
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	12,037	3,481	4,488	4,743
Loans charged-off	0	0	0	0
Recoveries	0	0	0	5
PCL, LHFI	1,034	84	8,583	(1,183)
Balance at end of period	13,071	3,565	13,071	3,565
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	30,647	28,555	34,794	21,185
Loans charged-off	(632)	(448)	(9,823)	(903)
Recoveries	16	7	81	27
PCL, LHFI	1,711	2,030	6,690	9,835
Balance at end of period	31,742	30,144	31,742	30,144
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	13,897	14,377	5,758	15,132
Loans charged-off	0	(3,453)	(2,494)	(3,453)
Recoveries	69	15	341	63
PCL, LHFI	(125)	(4,633)	10,236	(5,436)
Balance at end of period	$ 13,841	$ 6,306	$ 13,841	$ 6,306

Mortgage Banking - Schedule of

Mortgage Banking - Schedule of Activity in the Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Mortgage servicing rights [Abstract]
Balance at beginning of period	$ 131,870	$ 129,677
Origination of servicing assets	9,419	11,025
Change in fair value:
Due to market changes	$ (6,909)	$ 8,735
Servicing Asset, Fair Value, Change in Fair Value, Valuation Input, Statement of Income or Comprehensive Income [Extensible Enumeration]	Mortgage Banking Income	Mortgage Banking Income
Due to run-off	$ (8,527)	$ (7,058)
Balance at end of period	$ 125,853	$ 142,379

Mortgage Banking - Additional I

Mortgage Banking - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($) CPR	Sep. 30, 2023 USD ($) CPR
Mortgage servicing rights [Abstract]
Assumed average prepayment speed | CPR	9	8
Average discount rate	10.64%	10.07%
Residential mortgage loans sold	$ 843,600	$ 893,000
Period of putback response	60 days
Reserve for mortgage loan servicing putback expenses	$ 500	500
Gains on sale of mortgage banking	$ 14,800	$ 11,400

Mortgage Banking - Schedule o_2

Mortgage Banking - Schedule of Mortgage Loans Sold and Serviced for Others (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	$ 8,691,238	$ 8,477,375
Federal National Mortgage Association [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	4,832,202	4,826,028
Government National Mortgage Association [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	3,644,092	3,510,983
Federal Home Loan Mortgage Corporation [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	183,520	112,352
Other [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	$ 31,424	$ 28,012

Other Real Estate - Changes and

Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of period	$ 6,867	$ 1,986
Additions	4,703	5,434
Disposals	(5,609)	(1,903)
(Write-downs) recoveries	(2,041)	(32)
Balance at end of period	3,920	5,485
Gains (losses), net on the sale of other real estate included in other real estate expense	$ (1,054)	$ (159)

Other Real Estate - Other Real

Other Real Estate - Other Real Estate, by Type of Property (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Other real estate [Line Items]
Total other real estate	$ 3,920	$ 6,867	$ 5,485	$ 1,986
1 - 4 Family Residential Properties [Member]
Other real estate [Line Items]
Total other real estate	1,629	1,977
Nonfarm, Nonresidential Properties [Member]
Other real estate [Line Items]
Total other real estate	2,291	4,835
Other Real Estate Properties [Member]
Other real estate [Line Items]
Total other real estate	$ 0	$ 55

Other Real Estate - Other Rea_2

Other Real Estate - Other Real Estate, by Geographic Location (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Other Real Estate by Geographic Location [Line Items]
Total other real estate		$ 3,920	$ 6,867	$ 5,485	$ 1,986
Alabama [Member]
Other Real Estate by Geographic Location [Line Items]
Total other real estate		170	1,397
Mississippi [Member]
Other Real Estate by Geographic Location [Line Items]
Total other real estate	[1]	1,772	1,242
Texas [Member]
Other Real Estate by Geographic Location [Line Items]
Total other real estate		$ 1,978	$ 4,228
[1] Mississippi includes Central and Southern Mississippi Regions.

Other Real Estate - Additional

Other Real Estate - Additional information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Foreclosed residential real estate properties recorded as a result of obtaining physical possession of property	$ 1.6	$ 2
Consumer mortgage loans and that formal foreclosure proceedings are in process	$ 7.7	$ 6.4

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)
Lessee, Lease, Description [Line Items]
Interest Income from its Sales-Type and Direct Financing Leases	$ 3.6	$ 9.1
Minimum [Member]
Lessee, Lease, Description [Line Items]
Remaining Lease Term	2 years	2 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Remaining Lease Term	8 years	8 years

Leases - Components of the Trus

Leases - Components of the Trustmark's Net Investment in its Sales-Type and Direct Financing Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Leases receivable	$ 285,239	$ 161,319
Unearned income	(48,170)	(29,011)
Initial direct costs	2,455	1,326
Unguaranteed lease residual	8,209	4,101
Total net investment	$ 247,733	$ 137,735

Leases - Minimum Future Lease P

Leases - Minimum Future Lease Payments for Trustmark's Leases Receivable (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Sales-Type and Direct Financing Leases, Payment to be Received, Fiscal Year Maturity [Abstract]
2024 (excluding the nine months ended September 30, 2024)	$ 13,948
2025	49,378
2026	48,274
2027	60,828
2028	49,986
Thereafter	62,825
Lease receivable	$ 285,239

Leases - Components of Net Leas

Leases - Components of Net Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Finance leases:
Amortization of right-of-use assets	$ 113	$ 113	$ 339	$ 673
Interest on lease liabilities	37	41	113	124
Operating lease cost	1,344	1,258	3,756	3,566
Short-term lease cost	61	51	173	181
Variable lease cost	218	192	623	639
Sublease income	(58)	(3)	(63)	(9)
Net lease cost	$ 1,715	$ 1,652	$ 4,941	$ 5,174

Leases - Cash Payments Included

Leases - Cash Payments Included in Measurement of Lease Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Finance leases:
Operating cash flows included in operating activities	$ 113	$ 124
Financing cash flows included in payments under finance lease obligations	315	627
Operating leases:
Operating cash flows (fixed payments) included in other operating activities, net	3,535	3,022
Operating cash flows (liability reduction) included in other operating activities, net	$ 2,515	$ 2,425

Leases - Balance Sheet Informat

Leases - Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Finance lease right-of-use assets, net of accumulated depreciation	$ 3,412	$ 3,751
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Finance lease liabilities	$ 4,019	$ 4,334
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Operating lease right-of-use assets	$ 36,034	$ 35,711
Operating lease liabilities	$ 39,689	$ 39,097
Weighted-average lease term:
Finance leases	7 years 7 months 6 days	8 years 4 months 2 days
Operating leases	9 years 6 months	10 years 3 months 10 days
Weighted-average discount rate:
Finance leases	3.61%	3.61%
Operating leases	3.72%	3.67%

Leases - Future Minimum Rental

Leases - Future Minimum Rental Commitments Under Finance and Operating Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Finance leases, 2024 (excluding the nine months ended September 30, 2024)	$ 145
Finance leases, 2025	584
Finance leases, 2026	589
Finance leases, 2027	594
Finance leases, 2028	599
Finance Lease Thereafter	2,086
Finance leases, total minimum lease payments	4,597
Finance leases, imputed interest	(578)
Finance lease liabilities	4,019	$ 4,334
Operating leases, 2024 (excluding the nine months ended September 30, 2024)	1,312
Operating leases 2025	5,292
Operating leases, 2026	5,169
Operating leases, 2027	5,202
Operating leases, 2028	4,831
Operating leases, Thereafter	25,922
Operating leases, total minimum lease payments	47,728
Operating leases, imputed interest	(8,039)
Operating lease liabilities	$ 39,689	$ 39,097

Deposits - Deposits Summary (De

Deposits - Deposits Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Deposits [Abstract]
Noninterest-bearing demand	$ 3,142,792	$ 3,197,620
Interest-bearing demand	5,423,462	4,947,626
Savings	3,335,686	4,047,853
Time	3,338,995	3,376,664
Total deposits	$ 15,240,935	$ 15,569,763

Securities Sold Under Repurch_3

Securities Sold Under Repurchase Agreement - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Securities sold under repurchase agreements, secured by securities carrying amount	$ 37.9	$ 61.6

Securities Sold Under Repurch_4

Securities Sold Under Repurchase Agreements - Schedule of Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 31,515	$ 29,126
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	1,885	0
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	12,866	28,600
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	7,960	526
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 8,804	$ 0

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Other real estate sales, net gains (losses)	$ 92	$ 47	$ 1,100	$ 159

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Summary of Noninterest Income (Loss) Disaggregated by Reportable Operating Segment and Revenue Stream (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2024		Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		$ 11,272		$ 11,074		$ 33,154		$ 32,105
Bank card and other fees		7,931		8,217		24,584		24,937
Mortgage banking, net		6,119		6,458		19,238		20,697
Wealth management		9,288		8,773		27,932		26,435
Other, net		2,952		2,399		13,515		7,654
Security gains (losses), net						(182,792)
Total Noninterest Income (Loss)		37,562		36,921		(64,369)		111,828
Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		11,272		11,074		33,154		32,105
Bank card and other fees		7,713		7,344		23,408		23,047
Wealth management		9,288		8,773		27,932		26,435
Other, net		3,195		2,884		13,874		8,885
Total Noninterest Income (Loss)		31,468		30,075		98,368		90,472
Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Bank card and other fees		218	[1]	873	[1]	1,176	[2]	1,890	[2]
Mortgage banking, net		6,119	[1]	6,458	[1]	19,238	[2]	20,697	[2]
Other, net		(243)	[1]	(485)	[1]	(359)	[2]	(1,231)	[2]
Security gains (losses), net	[2]					(182,792)
Total Noninterest Income (Loss)		6,094	[1]	6,846	[1]	(162,737)	[2]	21,356	[2]
General Banking Segment [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		11,250		11,052		33,089		32,040
Bank card and other fees		7,879		8,205		24,457		24,901
Mortgage banking, net		6,119		6,458		19,238		20,697
Wealth management		175		202		538		650
Other, net		2,799		2,264		13,094		7,247
Security gains (losses), net						(182,792)
Total Noninterest Income (Loss)		28,222		28,181		(92,376)		85,535
General Banking Segment [Member] | Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		11,250		11,052		33,089		32,040
Bank card and other fees		7,661		7,332		23,281		23,011
Wealth management		175		202		538		650
Other, net		3,136		2,843		13,735		8,763
Total Noninterest Income (Loss)		22,222		21,429		70,643		64,464
General Banking Segment [Member] | Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Bank card and other fees		218	[1]	873	[1]	1,176	[2]	1,890	[2]
Mortgage banking, net		6,119	[1]	6,458	[1]	19,238	[2]	20,697	[2]
Other, net		(337)	[1]	(579)	[1]	(641)	[2]	(1,516)	[2]
Security gains (losses), net	[2]					(182,792)
Total Noninterest Income (Loss)		6,000	[1]	6,752	[1]	(163,019)	[2]	21,071	[2]
Wealth Management Segment [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		22		22		65		65
Bank card and other fees		52		12		127		36
Wealth management		9,113		8,571		27,394		25,785
Other, net		153		135		421		407
Total Noninterest Income (Loss)		9,340		8,740		28,007		26,293
Wealth Management Segment [Member] | Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		22		22		65		65
Bank card and other fees		52		12		127		36
Wealth management		9,113		8,571		27,394		25,785
Other, net		59		41		139		122
Total Noninterest Income (Loss)		9,246		8,646		27,725		26,008
Wealth Management Segment [Member] | Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Other, net		94	[1]	94	[1]	282	[2]	285	[2]
Total Noninterest Income (Loss)		$ 94	[1]	$ 94	[1]	$ 282	[2]	$ 285	[2]
[1] Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net. Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card fee income within bank card and other fees; mortgage banking, net; amortization of tax credits, cash surrender value on various life insurance policies, earnings on Trustmark’s non-qualified deferred compensation plans, other partnership investments and rental income within other, net; and security gains (losses), net.

Defined Benefit and Other Pos_3

Defined Benefit and Other Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Trustmark Capital Accumulation Plan [Member] | Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member]
Net periodic benefit cost [Abstract]
Service cost	$ 10	$ 13	$ 30	$ 39
Interest cost	62	73	185	219
Expected return on plan assets	(24)	(27)	(72)	(80)
Recognized net (gain) loss due to lump sum settlements	0	0	(13)	25
Net periodic benefit cost	48	59	130	203
Supplemental Retirement Plan [Member]
Net periodic benefit cost [Abstract]
Service cost	11	17	33	51
Interest cost	457	497	1,393	1,515
Amortization of prior service cost	28	28	83	83
Recognized net actuarial loss	84	70	263	216
Net periodic benefit cost	$ 580	$ 612	$ 1,772	$ 1,865

Defined Benefit and Other Pos_4

Defined Benefit and Other Postretirement Benefits - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Trustmark Capital Accumulation Plan [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Trustmark's minimum required contribution to the Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions	$ 132

Stock and Incentive Compensat_3

Stock and Incentive Compensation - Additional Information (Details)	9 Months Ended
	Sep. 30, 2024
Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shareholder return, performance measure	100%
Time Based Award [Member] | Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Time Based Award [Member] | Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	1 year

Stock and Incentive Compensat_4

Stock and Incentive Compensation - Summary of Stock Plan Activity (Details) - Stock and Incentive Compensation Plan [Member] - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Performance Units [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	208,045	174,214
Granted (in shares)	0	89,928
Released from restriction (in shares)	0	(54,973)
Forfeited (in shares)	0	(1,124)
Nonvested shares, end of period (in shares)	208,045	208,045
Time-Vested Awards [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	376,022	358,252
Granted (in shares)	1,500	161,646
Released from restriction (in shares)	(900)	(134,166)
Forfeited (in shares)	(2,149)	(11,259)
Nonvested shares, end of period (in shares)	374,473	374,473

Stock and Incentive Compensat_5

Stock and Incentive Compensation - Compensation Expense for Awards and Units Under Stock Plan (Details) - Stock and Incentive Compensation Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	$ 1,330	$ 1,494	$ 4,946	$ 4,772
Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	522	449	1,506	1,181
Time-Vested Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	$ 808	$ 1,045	$ 3,440	$ 3,591

Contingencies - Additional Info

Contingencies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 4,469	$ 5,030
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance	$ 127.5	127.8
Letters of credit, maturity term - maximum	3 years
Collateral held, fair value	$ 27.9	$ 32

Contingencies - Summary of Chan

Contingencies - Summary of Changes in ACL on Off-Balance Sheet Credit Exposures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 30,265	$ 34,841	$ 34,057	$ 36,838
PCL, off-balance sheet credit exposures	(1,375)	104	(5,167)	(1,893)
Balance at end of period	$ 28,890	$ 34,945	$ 28,890	$ 34,945

Earnings Per Share (EPS) - Weig

Earnings Per Share (EPS) - Weighted-Average Shares Used to Calculate Basic and Diluted EPS (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Basic shares	61,207,000	61,070,000	61,177,000	61,048,000
Dilutive shares	241,000	193,000	216,000	171,000
Diluted shares	61,448,000	61,263,000	61,393,000	61,219,000

Earnings Per Share (EPS) - We_2

Earnings Per Share (EPS) - Weighted-Average Antidilutive Stock Awards Excluded from Determining Diluted EPS (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Weighted-average antidilutive stock awards (in shares)	0	23	0	75

Statements of Cash Flows - Cash

Statements of Cash Flows - Cash Flows Supplementary Disclosures (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of cash flows specific transaction amounts [Abstract]
Income taxes paid	$ 19,887	$ 34,898
Interest expense paid on deposits and borrowings	296,939	214,745
Noncash transfers from loans to other real estate	4,703	5,434
Operating right-of-use assets resulting from lease liabilities	$ 1,831	$ 7,092

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 05, 2023	Dec. 06, 2022
Stockholders Equity [Line items]
Capital conservation buffer rate	2.50%
Stock Repurchase Program 3 [Member]
Stockholders Equity [Line items]
Amount of stock authorized for repurchase		$ 50	$ 50

Shareholders' Equity - Table of

Shareholders' Equity - Table of Actual Regulatory Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Trustmark Corporation [Member] | Common Equity Tier 1 Capital (to Risk Weighted Assets) [Member]
Common Equity Tier One Risk Based Capital [Abstract]
Actual Regulatory Capital Amount	$ 1,694,769	$ 1,521,665
Actual Regulatory Capital Ratio	11.30%	10.04%
Minimum Regulatory Capital Required Ratio	7%	7%
Minimum Regulatory Provision to be Well-Capitalized Ratio
Trustmark Corporation [Member] | Tier 1 Capital (to Risk Weighted Assets) [Member]
Tier 1 Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	$ 1,754,769	$ 1,581,665
Actual Regulatory Capital Ratio	11.70%	10.44%
Minimum Regulatory Capital Required Ratio	8.50%	8.50%
Minimum Regulatory Provision to be Well-Capitalized Ratio
Trustmark Corporation [Member] | Total Capital (to Risk Weighted Assets) [Member]
Total Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	$ 2,057,073	$ 1,862,246
Actual Regulatory Capital Ratio	13.71%	12.29%
Minimum Regulatory Capital Required Ratio	10.50%	10.50%
Minimum Regulatory Provision to be Well-Capitalized Ratio
Trustmark Corporation [Member] | Tier 1 Leverage (to Average Assets) [Member]
Tier 1 Leverage (to Average Assets) [Abstract]
Actual Regulatory Capital Amount	$ 1,754,769	$ 1,581,665
Actual Regulatory Capital Ratio	9.65%	8.62%
Minimum Regulatory Capital Required Ratio	4%	4%
Minimum Regulatory Provision to be Well-Capitalized Ratio
Trustmark National Bank [Member] | Common Equity Tier 1 Capital (to Risk Weighted Assets) [Member]
Common Equity Tier One Risk Based Capital [Abstract]
Actual Regulatory Capital Amount	$ 1,800,019	$ 1,602,327
Actual Regulatory Capital Ratio	12%	10.58%
Minimum Regulatory Capital Required Ratio	7%	7%
Minimum Regulatory Provision to be Well-Capitalized Ratio	6.50%	6.50%
Trustmark National Bank [Member] | Tier 1 Capital (to Risk Weighted Assets) [Member]
Tier 1 Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	$ 1,800,019	$ 1,602,327
Actual Regulatory Capital Ratio	12%	10.58%
Minimum Regulatory Capital Required Ratio	8.50%	8.50%
Minimum Regulatory Provision to be Well-Capitalized Ratio	8%	8%
Trustmark National Bank [Member] | Total Capital (to Risk Weighted Assets) [Member]
Total Capital (to Risk Weighted Assets) [Abstract]
Actual Regulatory Capital Amount	$ 1,978,676	$ 1,759,426
Actual Regulatory Capital Ratio	13.19%	11.61%
Minimum Regulatory Capital Required Ratio	10.50%	10.50%
Minimum Regulatory Provision to be Well-Capitalized Ratio	10%	10%
Trustmark National Bank [Member] | Tier 1 Leverage (to Average Assets) [Member]
Tier 1 Leverage (to Average Assets) [Abstract]
Actual Regulatory Capital Amount	$ 1,800,019	$ 1,602,327
Actual Regulatory Capital Ratio	9.90%	8.75%
Minimum Regulatory Capital Required Ratio	4%	4%
Minimum Regulatory Provision to be Well-Capitalized Ratio	5%	5%

Shareholders' Equity - Net Chan

Shareholders' Equity - Net Change in Components of Accumulated Other Comprehensive Income (Loss) and the Related Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax amount	$ 83,349	$ (29,576)	$ 254,237	$ (16,953)
Other Comprehensive Income (Loss), Tax, Total	(20,837)	7,392	(63,559)	4,468
Other comprehensive income (loss), before reclassifications, net of tax amount			42,444	(21,394)
Reclassification from accumulated other comprehensive income, current period, net of tax amount			148,234	8,909
Other comprehensive income (loss), net of tax amount	62,512	(22,184)	190,678	(12,485)
Securities Available for Sale and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, before tax amount	55,892	(26,963)	47,579	(16,062)
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, before tax amount	3,688	4,000	11,020	11,799
Reclassification from accumulated other comprehensive income, current period, before tax amount	0	0	182,792	0
Other comprehensive income (loss), before tax amount	59,580	(22,963)	241,391	(4,263)
Other comprehensive income (loss), before reclassifications, tax (expense) benefit	(13,973)	6,740	(11,895)	4,246
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	0	0	(45,698)	0
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, tax (expense) benefit	(922)	(1,000)	(2,755)	(2,950)
Other Comprehensive Income (Loss), Tax, Total	(14,895)	5,740	(60,348)	1,296
Other comprehensive income (loss), before reclassifications, net of tax amount	41,919	(20,223)	35,684	(11,816)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	0	0	137,094	0
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, net of tax amount	2,766	3,000	8,265	8,849
Other comprehensive income (loss), net of tax amount	44,685	(17,223)	181,043	(2,967)
Net Change in Prior Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, current period, before tax amount	28	28	83	83
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(7)	(7)	(21)	(21)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	21	21	62	62
Recognized Net Loss Due to Lump Sum Settlements [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, current period, before tax amount	0	0	(13)	25
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	0	0	3	(6)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	0	0	(10)	19
Change in Net Actuarial Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, current period, before tax amount	84	70	263	216
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(21)	(18)	(65)	(54)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	63	52	198	162
Pension and Other Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, current period, before tax amount	112	98	333	324
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(28)	(25)	(83)	(81)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	84	73	250	243
Cash Flow Hedge Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, before tax amount	18,826	(11,338)	(2,007)	(24,569)
Reclassification from accumulated other comprehensive income, current period, before tax amount	4,831	4,627	14,520	11,555
Other comprehensive income (loss), before tax amount	23,657	(6,711)	12,513	(13,014)
Other comprehensive income (loss), before reclassifications, tax (expense) benefit	(4,706)	2,834	502	6,142
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(1,208)	(1,157)	(3,630)	(2,889)
Other Comprehensive Income (Loss), Tax, Total	(5,914)	1,677	(3,128)	3,253
Other comprehensive income (loss), before reclassifications, net of tax amount	14,120	(8,504)	(1,505)	(18,427)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	3,623	3,470	10,890	8,666
Other comprehensive income (loss), net of tax amount	$ 17,743	$ (5,034)	$ 9,385	$ (9,761)

Shareholders' Equity - Changes

Shareholders' Equity - Changes in Balances of Component of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,879,141	$ 1,571,193	$ 1,661,847	$ 1,492,268
Other comprehensive income (loss) before reclassification			42,444	(21,394)
Amounts reclassified from accumulated other comprehensive income (loss)			148,234	8,909
Other comprehensive income (loss), net of tax amount	62,512	(22,184)	190,678	(12,485)
Balance	1,980,096	1,570,351	1,980,096	1,570,351
Securities Available for Sale and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(204,670)	(254,442)
Other comprehensive income (loss) before reclassification			43,949	(2,967)
Amounts reclassified from accumulated other comprehensive income (loss)			137,094	0
Other comprehensive income (loss), net of tax amount			181,043	(2,967)
Balance	(23,627)	(257,409)	(23,627)	(257,409)
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(6,075)	(5,792)
Other comprehensive income (loss) before reclassification			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			250	243
Other comprehensive income (loss), net of tax amount			250	243
Balance	(5,825)	(5,549)	(5,825)	(5,549)
Cash Flow Hedge Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(8,978)	(15,169)
Other comprehensive income (loss) before reclassification			(1,505)	(18,427)
Amounts reclassified from accumulated other comprehensive income (loss)			10,890	8,666
Other comprehensive income (loss), net of tax amount			9,385	(9,761)
Balance	407	(24,930)	407	(24,930)
Accumulated Other Comprehensive (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(91,557)	(265,704)	(219,723)	(275,403)
Balance	$ (29,045)	$ (287,888)	$ (29,045)	$ (287,888)

Fair Value - Financial Assets a

Fair Value - Financial Assets and Liabilities Measured at Fair Value Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 1,725,795	$ 1,762,878
Loans held for sale (LHFS)	216,454	184,812
Mortgage servicing rights (MSR)	125,853	131,870	$ 142,379	$ 129,677
U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	202,638	372,368
U.S. Government Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	19,335	5,792
Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,725,795	1,762,878
Loans held for sale (LHFS)	216,454	184,812
Mortgage servicing rights (MSR)	125,853	131,870
Other assets	20,502
Other liabilities	28,306
Other assets - derivatives		23,316
Other liabilities - derivatives		$ 35,600
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities
Recurring Basis [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	202,638	$ 372,368
Recurring Basis [Member] | U.S. Government Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	19,335	5,792
Recurring Basis [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,503,822	1,384,718
Level 1 [Member] | Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	202,638	372,368
Loans held for sale (LHFS)	0	0
Mortgage servicing rights (MSR)	0	0
Other assets	302
Other liabilities	336
Other assets - derivatives		7,685
Other liabilities - derivatives		21
Level 1 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	202,638	372,368
Level 1 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Level 1 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Level 2 [Member] | Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,523,157	1,390,510
Loans held for sale (LHFS)	216,454	184,812
Mortgage servicing rights (MSR)	0	0
Other assets	19,496
Other liabilities	27,970
Other assets - derivatives		14,786
Other liabilities - derivatives		35,579
Level 2 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Level 2 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	19,335	5,792
Level 2 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,503,822	1,384,718
Level 3 [Member] | Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Loans held for sale (LHFS)	0	0
Mortgage servicing rights (MSR)	125,853	131,870
Other assets	704
Other liabilities	0
Other assets - derivatives		845
Other liabilities - derivatives		0
Level 3 [Member] | Recurring Basis [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Level 3 [Member] | Recurring Basis [Member] | U.S. Government Agency Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Level 3 [Member] | Recurring Basis [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

Fair Value - Changes in Level 3

Fair Value - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Mortgage Banking Income	Mortgage Banking Income
MSR [Member] | Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		$ 131,870	$ 129,677
Total net (loss) gain included in Mortgage banking, net	[1]	(15,436)	1,677
Additions		9,419	11,025
Sales		0	0
Ending Balance		125,853	142,379
The amount of total gains (losses) for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period		(6,908)	8,734
Other Assets - Derivatives [Member] | Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		845	157
Total net (loss) gain included in Mortgage banking, net	[1]	2,154	1,672
Additions		0	0
Sales		(2,295)	(1,632)
Ending Balance		704	197
The amount of total gains (losses) for the period included in earnings that are attributable to the change in unrealized gains or losses still held, end of period		$ 1,580	$ 559
[1] Total net (loss) gain included in Mortgage banking, net relating to the MSR includes changes in fair value due to market changes and due to run-off.

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Outstanding balances in collateral dependent related to allowance for credit losses	$ 45,500		$ 45,500		$ 49,100
Collateral dependent related to allowance for credit losses	17,300		17,300		12,400
Foreclosed assets remeasured after initial recognition			803	$ 765
Write-downs of allowance for foreclosed assets after initial recognition			130	205
Noninterest gain (losses) Mortgage banking, net for changes in fair value of LHFS	480	$ (602)	(1,200)	(841)
Interest and fees on fair value option LHFS	2,400	$ 2,300	6,300	$ 5,900
Serviced GNMA loans eligible for repurchase	$ 89,400		$ 89,400		$ 78,800

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	$ 1,358,358	$ 1,426,279
Net LHFI	12,942,182	12,811,157
Deposits	15,240,935	15,569,763
Federal funds purchased and securities sold under repurchase agreements	365,643	405,745
Other borrowings	443,458	483,230
Subordinated notes	123,647	123,482
Junior subordinated debt securities	61,856	61,856
Level 2 [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	815,436	975,343
Securities held to maturity	1,358,358	1,426,279
Deposits	15,240,935	15,569,763
Federal funds purchased and securities sold under repurchase agreements	365,643	405,745
Other borrowings	443,458	483,230
Subordinated notes	123,647	123,482
Junior subordinated debt securities	61,856	61,856
Level 2 [Member] | Estimate Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and short-term investments	815,436	975,343
Securities held to maturity	1,316,167	1,355,504
Deposits	15,234,983	15,553,417
Federal funds purchased and securities sold under repurchase agreements	365,643	405,745
Other borrowings	443,458	483,226
Subordinated notes	119,063	108,125
Junior subordinated debt securities	48,248	48,856
Level 3 [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net LHFI	12,942,182	12,811,157
Level 3 [Member] | Estimate Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net LHFI	$ 13,025,566	$ 12,762,505

Fair Value - Fair Value and the

Fair Value - Fair Value and the Contractual Principal Outstanding of the LHFS (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair value and the contractual principal outstanding of the LHFS [Abstract]
Fair value of LHFS	$ 127,015	$ 105,974
LHFS contractual principal outstanding	125,041	102,994
Fair value less unpaid principal	$ 1,974	$ 2,980

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) Contract	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Contract	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) Contract
Designated as Hedging Instrument [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total excluded components of earnings recognition	$ 132	$ 13	$ 341	$ 35
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	1,390,000		1,390,000		$ 1,125,000
Interest and fees on LHFS and LHFI reclassified as a reduction over twelve months			5,800
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	$ 1,390,000		$ 1,390,000		$ 1,125,000
Derivatives not Designated as Hedging Instruments [Member] | Beneficiary [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of risk participation agreements | Contract	9		9		6
Aggregate notional amount of credit risk participation agreements	$ 60,300		$ 60,300		$ 40,100
Derivatives not Designated as Hedging Instruments [Member] | Guarantor [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of risk participation agreements | Contract	36		36		35
Aggregate notional amount of credit risk participation agreements	$ 286,200		$ 286,200		$ 304,700
Derivatives not Designated as Hedging Instruments [Member] | Mortgage Servicing Rights Hedge [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	296,500		296,500		285,000
Net (negative) positive ineffectiveness on MSR fair value	(2,500)	$ (1,000)	(8,100)	$ (4,100)
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	1,721,000		1,721,000		1,500,000
Termination value of derivatives	2,000		2,000		1,400
Collateral Posted	2,900		2,900		2,000
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet obligations	116,500		116,500		109,500
Valuation adjustment			144		(994)
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Lock Commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet obligations	$ 81,000		81,000		61,900
Valuation adjustment			$ 704		$ 845

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		$ 19,483	$ 14,781
Fair value of derivative liability		27,735	34,522
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	[1]	3,766	1,182
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	[1]	50	267
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		3,181	1,689
Derivatives not Designated as Hedging Instruments [Member] | Credit Risk Participation Agreement [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		13	5
Derivatives not Designated as Hedging Instruments [Member] | Credit Risk Participation Agreement [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability		91	63
Derivatives not Designated as Hedging Instruments [Member] | Future Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		269	7,505
Derivatives not Designated as Hedging Instruments [Member] | Future Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability		16	0
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability		144	994
Derivatives not Designated as Hedging Instruments [Member] | Exchange Traded Purchased Options [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		33	180
Derivatives not Designated as Hedging Instruments [Member] | OTC Written Options (Rate Locks) [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		704	845
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset	[1]	12,536	11,910
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability	[1]	27,685	34,255
Derivatives not Designated as Hedging Instruments [Member] | Exchange Traded Written Options [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability		$ 320	$ 21
[1] In accordance with GAAP, the variation margin collateral payments made or received for interest rate swaps that are centrally cleared are legally characterized as settled. As a result, the centrally cleared interest rate swaps included in other assets and other liabilities are presented on a net basis in the accompanying consolidated balance sheets.

Derivative Financial Instrume_5

Derivative Financial Instruments - Effects of Derivative Instruments on Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivatives, Fair Value [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Fee Income, Loan and Lease, Held-in-Portfolio	Interest and Fee Income, Loan and Lease, Held-in-Portfolio	Interest and Fee Income, Loan and Lease, Held-in-Portfolio	Interest and Fee Income, Loan and Lease, Held-in-Portfolio
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) and recognized in interest and fees on LHFS & LHFI	$ (4,831)	$ (4,627)	$ (14,520)	$ (11,555)
Derivatives not Designated as Hedging Instruments [Member] | Mortgage Banking, Net [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in mortgage banking, net	7,655	(7,634)	(478)	(11,526)
Derivatives not Designated as Hedging Instruments [Member] | Bank Card and Other Fees [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in bank card and other fees	$ (93)	$ 381	$ (98)	$ 571

Derivative Financial Instrume_6

Derivative Financial Instruments - Schedule of Amount Included in Other Comprehensive Income (Loss) for Derivative Instruments Designated as Hedges of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in other comprehensive income (loss), net of tax	$ (3,623)	$ (3,470)	$ (10,890)	$ (8,666)
Derivatives in Hedging Relationships [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in other comprehensive income (loss), net of tax	$ 14,120	$ (8,504)	$ (1,505)	$ (18,427)

Derivative Financial Instrume_7

Derivative Financial Instruments - Information about Financial Instruments that are Eligible for Offset in the Consolidated Balance Sheets (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Offsetting Derivative Assets
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	$ 19,483	$ 14,781
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	0
Net Amounts of Assets presented in the Statement of Financial Position, Offsetting of Derivative Assets	19,483	14,781
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	(7,121)	(4,339)
Cash Collateral Received, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	0
Net Amount, Offsetting of Derivative Assets	12,362	10,442
Offsetting Derivative Liabilities
Gross Amounts of Recognized Liabilities, Offsetting of Derivative Liabilities	27,735	34,522
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	0	0
Net Amounts of Liabilities presented in the Statement of Financial Position, Offsetting of Derivative Liabilities	27,735	34,522
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	(7,121)	(4,339)
Cash Collateral Posted, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	(2,850)	(2,040)
Net Amount, Offsetting of Derivative Liabilities	$ 17,764	$ 28,143

Segment Information - Additiona

Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2024 Segment
Segment Reporting [Abstract]
Number of segments in which the business operates	2

Segment Information - Schedule

Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net interest income	$ 154,714	$ 138,637	$ 428,573	$ 416,136
Provision for credit losses	6,548	8,426	33,793	17,884
Noninterest income (loss)	37,562	36,921	(64,369)	111,828
Noninterest expense	123,270	130,291	361,260	369,501
Income (Loss) From Continuing Operations Before Income Taxes	62,458	36,841	(30,849)	140,579
Income taxes	11,128	6,288	(19,747)	21,177
Income (Loss) From Continuing Operations	51,330	30,553	(11,102)	119,402
Selected Financial Information
Total assets	18,480,372		18,480,372		$ 18,722,189
Depreciation and amortization			28,405	26,129
Continuing Operations [Member]
Selected Financial Information
Total assets	18,480,372	18,321,164	18,480,372	18,321,164
Depreciation and amortization	9,718	9,546	28,186	25,695
General Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	153,189	137,143	424,236	411,674
Provision for credit losses	6,551	10,646	33,631	20,015
Noninterest income (loss)	28,222	28,181	(92,376)	85,535
Noninterest expense	115,157	122,010	336,835	345,225
Income (Loss) From Continuing Operations Before Income Taxes	59,703	32,668	(38,606)	131,969
Income taxes	10,445	5,245	(21,675)	19,024
Income (Loss) From Continuing Operations	49,258	27,423	(16,931)	112,945
Selected Financial Information
Total assets	18,282,757	18,126,327	18,282,757	18,126,327
Depreciation and amortization	9,656	9,483	27,998	25,496
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income	1,525	1,494	4,337	4,462
Provision for credit losses	(3)	(2,220)	162	(2,131)
Noninterest income (loss)	9,340	8,740	28,007	26,293
Noninterest expense	8,113	8,281	24,425	24,276
Income (Loss) From Continuing Operations Before Income Taxes	2,755	4,173	7,757	8,610
Income taxes	683	1,043	1,928	2,153
Income (Loss) From Continuing Operations	2,072	3,130	5,829	6,457
Selected Financial Information
Total assets	197,615	194,837	197,615	194,837
Depreciation and amortization	$ 62	$ 63	$ 188	$ 199

Accounting Policies Recently _3

Accounting Policies Recently Adopted and Pending Accounting Pronouncements - Additional Information (Details)	Sep. 30, 2024
Accounting Standards Update 2023-07 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2024
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
Accounting Standards Update 2023-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2025
Change in accounting principle, accounting standards update, immaterial effect [true false]	true