Trustmark (TRMK) 10-K 19 Feb 25 2024 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Jan. 31, 2025	Jun. 30, 2024
Cover [Abstract]
Entity Registrant Name	TRUSTMARK CORP
Entity Central Index Key	0000036146
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 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 File Number	000-3683
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 Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Public Float			$ 1,003
Entity Common Stock, Shares Outstanding		60,765,271
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the Proxy Statement for Trustmark’s 2025 Annual Meeting of Shareholders to be held April 22, 2025 are incorporated by reference into Part III of the Form 10-K report.
Auditor Name	Crowe LLP
Auditor Location	Fort Lauderdale, Florida
Auditor Firm ID	173
Auditor Opinion [Text Block]	Opinions on the Financial Statements and Internal Control over Financial Reporting We have audited the accompanying consolidated balance sheets of Trustmark Corporation and subsidiaries (the “Company”) as of December 31, 2024, and 2023, the related consolidated statements of income, comprehensive income, changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). We also have audited the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control – Integrated Framework: (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2024, and 2023, and the results of their operations and their cash flows for each of the years in the three-year period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control – Integrated Framework: (2013) issued by COSO.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 567,251	$ 975,343
Securities available for sale, at fair value (amortized cost: $1,719,537 - 2024 $1,959,007-2023; allowance for credit losses (ACL): $0)	1,692,534	1,762,878
Securities held to maturity, net of ACL of $0 (fair value: $1,259,107-2024; $1,355,504-2023)	1,335,385	1,426,279
Loans held for sale (LHFS)	200,307	184,812
Loans held for investment (LHFI)	13,089,942	12,950,524
Less ACL, LHFI	160,270	139,367
Net LHFI	12,929,672	12,811,157
Premises and equipment, net	235,410	232,229
Mortgage servicing rights (MSR)	139,317	131,870
Goodwill	334,605	334,605
Identifiable intangible assets, net	126	236
Other real estate, net	5,917	6,867
Operating lease right-of-use assets	34,668	35,711
Other assets	677,230	752,568
Assets of discontinued operations	0	67,634
Total Assets	18,152,422	18,722,189
Deposits:
Noninterest-bearing	3,073,565	3,197,620
Interest-bearing	12,034,610	12,372,143
Total deposits	15,108,175	15,569,763
Federal funds purchased and securities sold under repurchase agreements	324,008	405,745
Other borrowings	301,541	483,230
Subordinated notes	123,702	123,482
Junior subordinated debt securities	61,856	61,856
ACL on off-balance sheet credit exposures	29,392	34,057
Operating lease liabilities	38,698	39,097
Other liabilities	202,723	331,085
Liabilities of discontinued operations	0	12,027
Total Liabilities	16,190,095	17,060,342
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 61,008,023 shares - 2024; 61,071,173 shares - 2023	12,711	12,725
Capital surplus	157,899	159,688
Retained earnings	1,875,376	1,709,157
Accumulated other comprehensive income (loss), net of tax	(83,659)	(219,723)
Total Shareholders' Equity	1,962,327	1,661,847
Total Liabilities and Shareholders' Equity	$ 18,152,422	$ 18,722,189

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Assets
Securities available-for-sale, amortized cost	$ 1,719,537,000	$ 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	$ 1,259,107,000	$ 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)	61,008,023	61,071,173
Common stock, outstanding (in shares)	61,008,023	61,071,173

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest Income
Interest and fees on LHFS & LHFI		$ 844,738	$ 775,309	$ 472,990
Interest and fees on PPP loans		0	0	639
Interest on securities:
Taxable		85,921	66,100	59,717
Tax exempt		4	208	333
Other interest income		29,667	37,215	8,154
Total Interest Income		960,330	878,832	541,833
Interest Expense
Interest on deposits		329,381	245,951	29,069
Interest on federal funds purchased and securities sold under repurchase agreements		20,154	20,419	6,127
Other interest expense		26,374	59,584	11,929
Total Interest Expense		375,909	325,954	47,125
Net Interest Income		584,421	552,878	494,708
PCL, off-balance sheet credit exposures		(4,665)	(2,781)	1,215
Net Interest Income After PCL		543,166	528,297	471,816
Noninterest Income
Service charges on deposit accounts		44,382	43,416	42,157
Bank card and other fees		33,301	33,439	36,105
Mortgage banking, net		26,626	26,216	28,306
Wealth management		37,251	35,092	35,013
Other, net		17,813	10,231	9,841
Securities gains (losses), net		(182,792)	39	0
Total Noninterest Income (loss)		(23,419)	148,433	151,422
Noninterest Expense
Salaries and employee benefits		266,239	268,270	254,247
Services and fees		101,590	107,805	103,893
Net occupancy - premises		29,128	28,507	27,986
Equipment expense		24,915	25,844	24,145
Litigation settlement expense		0	6,500	100,750
Other expense		63,818	58,770	53,112
Total Noninterest Expense		485,690	495,696	564,133
Income from continuing operations before income taxes		34,057	181,034	59,105
Income taxes from continuing operations		(11,153)	27,744	(1,813)
Income From Continuing Operations		45,210	153,290	60,918
Income from discontinued operations before income taxes		237,152	16,302	14,642
Income taxes from discontinued operations		59,353	4,103	3,673
Income From Discontinued Operations		177,799	12,199	10,969
Net Income		$ 223,009	$ 165,489	$ 71,887
Earnings Per Share (EPS)
Basic EPS from continuing operations		$ 0.74	$ 2.51	$ 0.99
Basic EPS from discontinued operations		2.91	0.2	0.18
Basic EPS	[1]	3.65	2.71	1.17
Diluted EPS from continuing operations		0.74	2.5	0.99
Diluted EPS from discontinued operations		2.9	0.2	0.18
Diluted EPS	[1]	$ 3.63	$ 2.7	$ 1.17
Loans Held For Investment [Member]
Interest Expense
PCL, LHFI		$ 37,287	$ 27,362	$ 21,677
1-4 Family Mortgage Loans [Member]
Interest Expense
PCL, LHFI		$ 8,633	$ 0	$ 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 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 223,009	$ 165,489	$ 71,887
Net unrealized gains (losses) on available for sale securities and transferred securities:
Net unrealized holding gains (losses) arising during the period	(10,249)	38,133	(172,143)
Reclassification adjustment for net (gains) losses realized in net income	137,094	(29)	0
Change in net unrealized holding loss on securities transferred to held to maturity	10,940	11,668	(64,525)
Pension and other postretirement benefit plans:
Change in the actuarial loss of pension and other postretirement benefit plans	1,095	(518)	8,094
Reclassification adjustments for changes realized in net income:
Net change in prior service costs	83	83	83
Recognized net (gain) loss due to lump sum settlements	(10)	19	0
Change in net actuarial loss	186	133	817
Derivatives:
Change in the accumulated gain (loss) on effective cash flow hedge derivatives	(16,674)	(6,098)	(15,514)
Reclassification adjustment for (gain) loss realized in net income	13,599	12,289	345
Other comprehensive income (loss), net of tax	136,064	55,680	(242,843)
Comprehensive income (loss)	$ 359,073	$ 221,169	$ (170,956)

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2021	$ 1,741,311	$ 12,845	$ 175,913	$ 1,585,113	$ (32,560)
Balance (in shares) at Dec. 31, 2021		61,648,679
Net Income (Loss)	71,887			71,887
Other comprehensive income (loss), net of tax	(242,843)				(242,843)
Cash dividends paid on common stock ($0.92 per share)	(56,679)			(56,679)
Shares withheld to pay taxes, long-term incentive plan	(1,687)	$ 24	(1,711)
Shares withheld to pay taxes, long-term incentive plan (in shares)		118,398
Repurchase and retirement of common stock	(24,604)	$ (164)	(24,440)
Repurchase and retirement of common stock (in shares)		(789,391)
Compensation expense, long-term incentive plan	4,883		4,883
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)	165,489			165,489
Other comprehensive income (loss), net of tax	55,680				55,680
Cash dividends paid on common stock ($0.92 per share)	(56,653)			(56,653)
Shares withheld to pay taxes, long-term incentive plan	(1,092)	$ 20	(1,112)
Shares withheld to pay taxes, long-term incentive plan (in shares)		93,487
Compensation expense, long-term incentive plan	6,155		6,155
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)	$ 223,009			223,009
Other comprehensive income (loss), net of tax	136,064				136,064
Cash dividends paid on common stock ($0.92 per share)	(56,790)			(56,790)
Shares withheld to pay taxes, long-term incentive plan	(1,519)	$ 29	(1,548)
Shares withheld to pay taxes, long-term incentive plan (in shares)		140,003
Repurchase and retirement of common stock	(7,499)	$ (43)	(7,456)
Repurchase and retirement of common stock (in shares)		(203,153)
Compensation expense, long-term incentive plan	7,215		7,215
Balance at Dec. 31, 2024	$ 1,962,327	$ 12,711	$ 157,899	$ 1,875,376	$ (83,659)
Balance (in shares) at Dec. 31, 2024	61,008,023	61,008,023

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in dollars per share)	$ 0.92	$ 0.92	$ 0.92

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net Income (Loss)	$ 223,009	$ 165,489	$ 71,887
Adjustments to reconcile net income to net cash provided by operating activities:
PCL	41,255	24,581	22,892
Depreciation and amortization	38,067	35,756	39,882
Net (accretion) amortization of securities	(10,571)	6,140	11,206
Securities (gains) losses, net	182,792	(39)	0
Gains on sales of loans, net	(19,279)	(13,599)	(24,914)
Gain on disposition of business	(228,272)	0	0
Compensation expense, long-term incentive plan	7,215	6,155	4,883
Deferred income tax provision	23,800	(4,800)	(16,800)
Proceeds from sales of LHFS	1,161,563	1,149,609	1,267,967
Purchases and originations of LHFS	(1,137,962)	(1,177,563)	(1,116,232)
Originations of MSR	(13,291)	(13,712)	(17,843)
Earnings on bank-owned life insurance	(4,078)	(5,244)	(4,875)
Net change in other assets	(6,225)	(11,454)	(51,921)
Net change in other liabilities	(108,545)	34,376	167,743
Other operating activities, net	(32,549)	1,192	(57,359)
Net cash from operating activities	116,929	196,887	296,516
Investing Activities
Proceeds from maturities, prepayments and calls of securities held to maturity	116,186	103,051	136,135
Proceeds from maturities, prepayments and calls of securities available for sale	243,981	301,344	435,386
Proceeds from sales of securities available for sale	1,378,272	4,796	0
Purchases of securities held to maturity	(10,644)	(19,491)	(604,938)
Purchases of securities available for sale	(1,555,065)	0	(230,527)
Net proceeds from bank-owned life insurance	(46)	(46)	288
Net change in federal funds sold and securities purchased under reverse repurchase agreements	0	4,000	(4,000)
Net change in member bank stock	9,496	17,830	(39,329)
Net change in LHFI	(220,974)	(761,931)	(1,925,327)
Proceeds from sales of 1-4 family mortgage loans	43,935	0	0
Purchases of premises and equipment	(23,493)	(40,082)	(26,624)
Proceeds from sales of premises and equipment	2,219	1,863	5,107
Proceeds from sales of other real estate	4,980	2,410	3,136
Purchases of software	(5,092)	(8,575)	(7,388)
Investments in tax credit and other partnerships	(20,706)	(16,343)	(22,321)
Proceeds from disposition of business, net	321,345	0	0
Other, net	200	0	0
Net cash from investing activities	284,594	(411,174)	(2,280,402)
Financing Activities
Net change in deposits	(461,588)	1,132,115	(649,512)
Net change in federal funds purchased and securities sold under repurchase agreements	(81,737)	(43,586)	210,754
Net change in other borrowings	(200,058)	(575,020)	974,981
Payments under finance lease obligations	(424)	(721)	(1,409)
Common stock dividends	(56,790)	(56,653)	(56,679)
Repurchase and retirement of common stock	(7,499)	0	(24,604)
Shares withheld to pay taxes, long-term incentive plan	(1,519)	(1,092)	(1,687)
Net cash from financing activities	(809,615)	455,043	451,844
Net change in cash and cash equivalents	(408,092)	240,756	(1,532,042)
Cash and cash equivalents at beginning of year	975,343	734,587	2,266,629
Cash and cash equivalents at end of year	$ 567,251	$ 975,343	$ 734,587

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 223,009	$ 165,489	$ 71,887

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 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

Cybersecurity Risk Management,

Cybersecurity Risk Management, Strategy and Governance	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	ITEM 1C. CYBERSECURITY Trustmark recognizes the critical importance of identifying, assessing and managing material risks from cybersecurity threats. Trustmark is committed to implementing and maintaining a comprehensive information security program to manage such risks and safeguard its systems and data. Trustmark’s Board of Directors has ultimate oversight of cybersecurity-related risks and it is assisted in this role by the Enterprise Risk Committee and the Audit Committee. Processes for identifying, assessing and managing cybersecurity-related risks are integrated into Trustmark’s overall enterprise risk management process, which is overseen by the Enterprise Risk Committee. The Enterprise Risk Committee is responsible for monitoring risks that are being taken by Trustmark, understanding the enterprise-wide effect of those risks and reporting such risks to the Board. In fulfilling this role, the Enterprise Risk Committee has primary oversight responsibility over management’s efforts to manage and mitigate cybersecurity-related risk and reviews and approves Trustmark’s cybersecurity strategy for protecting Trustmark’s information assets and technology platforms. The Audit Committee oversees Trustmark’s Internal Audit Department, which conducts reviews and assessments related to information security. Management provides periodic reports to the Enterprise Risk Committee and the Audit Committee, both of which provide reports of their meetings to the full Board. These reports to the Board and its Committees address the threat environment, vulnerability assessments, specific cyber incidents and management’s efforts to monitor, detect and prevent cyber threats. Trustmark’s information security program is primarily administered at the management level by the Information Security Department, which is led by Trustmark’s Chief Information Security Officer (CISO), and is supported by the Information Technology Department, which is led by Trustmark’s Chief Information Officer (CIO). The CISO reports to the CIO, who in turn reports to Trustmark’s Chief Credit and Operations Officer. Trustmark’s Information Security Department is responsible for day-to-day management of Trustmark’s information security program, including data loss prevention, access control, threat monitoring, incident response, insider threat monitoring and employee education and training. The Information Security Department also maintains policies related to cybersecurity and data security that provide the required governance for the information security program. Additionally, Trustmark’s Information Technology Department maintains policies that govern technical aspects of Trustmark’s information security program. Each policy is reviewed and approved by the Enterprise Risk Committee at least every three years and is mapped to applicable regulatory guidance. The Cybersecurity Operations team within the Information Technology Department maintains and runs Trustmark’s security operations center and is responsible for cybersecurity event management and maintaining security tooling. Trustmark also maintains an Information Security / Cybersecurity Management Committee, which is comprised of representatives from the Information Security, Information Technology, Enterprise Risk, Corporate Security, Internal Audit and Legal departments and members of executive management. This committee meets quarterly to discuss and review Trustmark’s information security program and receives qualitative and quantitative update reports from the Information Security Department, Internal Audit Department and Information Technology Department. Trustmark engages third party assessors, consultants and auditors in connection with its information security program, including to conduct external penetration testing, independent audits and risk assessments. Trustmark also utilizes third party service providers in the ordinary course of business. The Information Security Department performs information security assessments for third party service providers that store or process Trustmark confidential data. These information security assessments include a review of any systems and organization control reports, proof of the vendor’s independent testing of their data protection controls, as well as a review of any exceptions noted and assessment of management responses, results of vulnerability and penetration testing, incident response processes and third party data protection controls (which can include, but is not limited to: access reviews and controls, backups, monitoring, encryption standards and disaster recovery). The review of these areas is taken into account in order to provide an overall information security conclusion and risk rating for the vendor. As a regulated financial institution, Trustmark is also subject to financial privacy laws and its cybersecurity practices are subject to oversight by the federal banking agencies. For additional information, see “Supervision and Regulation – Financial Privacy Laws and Cybersecurity” included in Part I. Item 1 – Business of this report. Although Trustmark has not, as of the date of this Annual Report on Form 10-K, experienced a cybersecurity threat or incident that materially affected its business strategy, results of operations or financial condition, there can be no guarantee that Trustmark will not experience such an incident in the future. For additional information regarding the risk Trustmark faces from cybersecurity threats, please see the risk factors titled “ Trustmark may experience disruptions of its operating systems or breaches in its information system security ” and “ Trustmark must utilize new technologies to deliver its products and services, which could require significant resources and expose Trustmark to additional risks, including cyber-security risks ” included in Part I. Item 1A. – Risk Factors of this report.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Processes for identifying, assessing and managing cybersecurity-related risks are integrated into Trustmark’s overall enterprise risk management process, which is overseen by the Enterprise Risk Committee. The Enterprise Risk Committee is responsible for monitoring risks that are being taken by Trustmark, understanding the enterprise-wide effect of those risks and reporting such risks to the Board. In fulfilling this role, the Enterprise Risk Committee has primary oversight responsibility over management’s efforts to manage and mitigate cybersecurity-related risk and reviews and approves Trustmark’s cybersecurity strategy for protecting Trustmark’s information assets and technology platforms.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Trustmark’s Board of Directors has ultimate oversight of cybersecurity-related risks and it is assisted in this role by the Enterprise Risk Committee and the Audit Committee. Processes for identifying, assessing and managing cybersecurity-related risks are integrated into Trustmark’s overall enterprise risk management process, which is overseen by the Enterprise Risk Committee. The Enterprise Risk Committee is responsible for monitoring risks that are being taken by Trustmark, understanding the enterprise-wide effect of those risks and reporting such risks to the Board. In fulfilling this role, the Enterprise Risk Committee has primary oversight responsibility over management’s efforts to manage and mitigate cybersecurity-related risk and reviews and approves Trustmark’s cybersecurity strategy for protecting Trustmark’s information assets and technology platforms. The Audit Committee oversees Trustmark’s Internal Audit Department, which conducts reviews and assessments related to information security. Management provides periodic reports to the Enterprise Risk Committee and the Audit Committee, both of which provide reports of their meetings to the full Board. These reports to the Board and its Committees address the threat environment, vulnerability assessments, specific cyber incidents and management’s efforts to monitor, detect and prevent cyber threats. Trustmark’s information security program is primarily administered at the management level by the Information Security Department, which is led by Trustmark’s Chief Information Security Officer (CISO), and is supported by the Information Technology Department, which is led by Trustmark’s Chief Information Officer (CIO). The CISO reports to the CIO, who in turn reports to Trustmark’s Chief Credit and Operations Officer. Trustmark’s Information Security Department is responsible for day-to-day management of Trustmark’s information security program, including data loss prevention, access control, threat monitoring, incident response, insider threat monitoring and employee education and training. The Information Security Department also maintains policies related to cybersecurity and data security that provide the required governance for the information security program. Additionally, Trustmark’s Information Technology Department maintains policies that govern technical aspects of Trustmark’s information security program. Each policy is reviewed and approved by the Enterprise Risk Committee at least every three years and is mapped to applicable regulatory guidance. The Cybersecurity Operations team within the Information Technology Department maintains and runs Trustmark’s security operations center and is responsible for cybersecurity event management and maintaining security tooling. Trustmark also maintains an Information Security / Cybersecurity Management Committee, which is comprised of representatives from the Information Security, Information Technology, Enterprise Risk, Corporate Security, Internal Audit and Legal departments and members of executive management. This committee meets quarterly to discuss and review Trustmark’s information security program and receives qualitative and quantitative update reports from the Information Security Department, Internal Audit Department and Information Technology Department.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Enterprise Risk Committee is responsible for monitoring risks that are being taken by Trustmark, understanding the enterprise-wide effect of those risks and reporting such risks to the Board. In fulfilling this role, the Enterprise Risk Committee has primary oversight responsibility over management’s efforts to manage and mitigate cybersecurity-related risk and reviews and approves Trustmark’s cybersecurity strategy for protecting Trustmark’s information assets and technology platforms. The Audit Committee oversees Trustmark’s Internal Audit Department, which conducts reviews and assessments related to information security.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	Management provides periodic reports to the Enterprise Risk Committee and the Audit Committee, both of which provide reports of their meetings to the full Board.
Cybersecurity Risk Role of Management [Text Block]	Trustmark’s information security program is primarily administered at the management level by the Information Security Department, which is led by Trustmark’s Chief Information Security Officer (CISO), and is supported by the Information Technology Department, which is led by Trustmark’s Chief Information Officer (CIO). The CISO reports to the CIO, who in turn reports to Trustmark’s Chief Credit and Operations Officer. Trustmark’s Information Security Department is responsible for day-to-day management of Trustmark’s information security program, including data loss prevention, access control, threat monitoring, incident response, insider threat monitoring and employee education and training. The Information Security Department also maintains policies related to cybersecurity and data security that provide the required governance for the information security program. Additionally, Trustmark’s Information Technology Department maintains policies that govern technical aspects of Trustmark’s information security program. Each policy is reviewed and approved by the Enterprise Risk Committee at least every three years and is mapped to applicable regulatory guidance. The Cybersecurity Operations team within the Information Technology Department maintains and runs Trustmark’s security operations center and is responsible for cybersecurity event management and maintaining security tooling. Trustmark also maintains an Information Security / Cybersecurity Management Committee, which is comprised of representatives from the Information Security, Information Technology, Enterprise Risk, Corporate Security, Internal Audit and Legal departments and members of executive management. This committee meets quarterly to discuss and review Trustmark’s information security program and receives qualitative and quantitative update reports from the Information Security Department, Internal Audit Department and Information Technology Department.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The CISO reports to the CIO, who in turn reports to Trustmark’s Chief Credit and Operations Officer.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Trustmark’s Information Security Department is responsible for day-to-day management of Trustmark’s information security program, including data loss prevention, access control, threat monitoring, incident response, insider threat monitoring and employee education and training.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 – Significant Accounting Policies Business 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. Basis of Financial Statement Presentation 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 consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). 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 2025 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. Securities Securities are classified as either held to maturity or available for sale. Securities are classified as held to maturity and carried at amortized cost when Management has the positive intent and the ability to hold them until maturity. Securities to be held for indefinite periods of time are classified as available for sale and carried at fair value, with the unrealized holding gains and losses reported as a component of other comprehensive income (loss), net of tax. Securities available for sale are used as part of Trustmark’s interest rate risk management strategy and may be sold in response to changes in interest rates, changes in prepayment rates and other factors. Management determines the appropriate classification of securities at the time of purchase. The amortized cost of debt securities classified as securities held to maturity or securities available for sale is adjusted for amortization of premiums and accretion of discounts to maturity of the security using the interest method. Such amortization or accretion is included in interest on securities. Realized gains and losses are determined using the specific identification method and are included in noninterest income as securities gains (losses), net. Securities transferred from the available for sale category to the held to maturity category are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with the transfer of securities from available for sale to held to maturity are included in the balance of accumulated other comprehensive income (loss), net of tax, in the consolidated balance sheets. These unrealized holding gains or losses are amortized over the remaining life of the security as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. Allowance for Credit Losses (ACL) Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 326 requires a current expected credit losses methodology for estimating allowances for credit losses and applies to all financial instruments carried at amortized cost, including securities held to maturity, and makes targeted improvements to the accounting for credit losses on securities available for sale. Under FASB ASC Topic 326, the ACL is an estimate measured using relevant information about past events, including historical credit loss experience on financial assets with similar risk characteristics, current conditions, and reasonable and supportable forecasts that affect the collectability of the remaining cash flows over the contractual term of the financial assets. Trustmark adopted a zero-credit loss assumption for certain classes of securities. This zero-credit loss assumption applies to debt issuances of the U.S. Treasury and agencies and instrumentalities of the United States government. The reasons behind the adoption of the zero-credit loss assumption were as follows: • High credit rating • Long history with no credit losses • Guaranteed by a sovereign entity • Widely recognized as “risk-free rate” • Ability and authority to print its own currency • Currency is routinely held by central banks, used in international commerce, and commonly viewed as reserve currency • Currently under the U.S. Government conservatorship or receivership Trustmark continuously monitors any changes in economic conditions, credit downgrades, changes to explicit or implicit guarantees granted to certain debt issuers, and any other relevant information that would indicate potential credit deterioration and prompt Trustmark to reconsider its zero-credit loss assumption. Securities Available for Sale FASB ASC Subtopic 326-30, “Financial Instruments-Credit Losses-Available-for-Sale Debt Securities,” replaced the concept of other-than-temporarily impaired with the ACL. Unlike securities held to maturity, securities available for sale are evaluated on an individual level and pooling of securities is not allowed. 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 as outlined below: • Review the extent to which the fair value is less than the amortized cost and observe the security’s lowest credit rating as reported by third-party credit ratings companies. • The securities that violate the credit loss triggers above would be subjected to additional analysis that may include, but is not limited to: changes in market interest rates, changes in securities credit ratings, security type, service area economic factors, financial performance of the issuer/or obligor of the underlying issue and third-party guarantee. • If Trustmark determines that a credit loss exists, the credit portion of the allowance will be 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 Trustmark records will be 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). Accrued interest receivable is excluded from the estimate of credit losses for securities available for sale and reported in other assets on the consolidated balance sheets. Securities Held to Maturity FASB ASC Subtopic 326-20, “Financial Instruments-Credit Losses-Measured at Amortized Cost,” requires institutions to measure expected credit losses on financial assets carried at amortized cost on a collective or pool basis when similar risks exist. Trustmark uses several levels of segmentation to measure expected credit losses for its held to maturity securities: • The portfolio is segmented into agency and non-agency securities. • The non-agency securities are separated into municipal, mortgage, and corporate securities. • Each individual segment is categorized by third-party credit ratings. As discussed above, Trustmark has determined that for certain classes of securities it would be appropriate to assume the expected credit loss to be zero , which include debt issuances of the U.S. Treasury and agencies and instrumentalities of the United States government. This assumption is reviewed and attested to quarterly. Trustmark uses an internally built model to verify the accuracy of third-party provided calculations. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity and included in other assets on the consolidated balance sheets. Trustmark monitors the credit quality of securities held to maturity on a monthly basis through credit ratings. LHFS Trustmark's LHFS portfolio consists of mortgage loans purchased from wholesale customers or originated in Trustmark’s General Banking Segment. Trustmark has elected to account for its LHFS under the fair value option permitted by FASB ASC Topic 825, “Financial Instruments,” with interest income on the LHFS reported in interest and fees on LHFS and LHFI. Trustmark reports unrealized gains and losses resulting from changes in the fair value of the LHFS accounted for under the fair value option as noninterest income in mortgage banking, net. 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 the fair value reported as noninterest income in mortgage banking, net. Changes in the fair value of the LHFS are largely offset by changes in the fair value of the derivative instruments. Election of the fair value option allows Trustmark to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for its LHFS at the lower of cost or fair value and the derivative instruments at fair value. Realized gains and losses upon ultimate sale of the loans are reported as noninterest income in mortgage banking, net. Government National Mortgage Association (GNMA) optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under FASB ASC Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When Trustmark is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as LHFS, regardless of whether Trustmark intends to exercise the buy-back option. These loans are reported as LHFS with the offsetting liability being reported as short-term borrowings. The fair value option election does not apply to the GNMA optional repurchase loans which do not meet the requirements under FASB ASC Topic 825 to be accounted for under the fair value option. Trustmark defers the upfront loan fees and costs related to the LHFS. In general, the LHFS are only retained on Trustmark’s balance sheet for 30 to 45 days before they are pooled and sold in the secondary market. The difference between deferring these loan fees and costs until the loans are sold and recognizing them in earnings as incurred as required by FASB ASC Subtopic 825-10 is considered immaterial. Deferred loan fees and costs are reflected in the basis of the LHFS and, as such, impact the resulting gain or loss when the loans are sold. LHFI LHFI are loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off and are reported at amortized cost net of the ACL. Amortized cost is the amount of unpaid principal, adjusted for the net amount of direct costs and nonrefundable loan fees associated with lending. The net amount of nonrefundable loan origination fees and direct costs associated with the lending process, including commitment fees, is deferred and accreted to interest income over the lives of the loans using a method that approximates the interest method. Interest on LHFI is accrued and recorded as interest income based on the outstanding principal balance. Past due LHFI are loans contractually past due 30 days or more as to principal or interest payments. A LHFI is classified as nonaccrual, and the accrual of interest on such loan is discontinued, when the contractual payment of principal or interest becomes 90 days past due on commercial credits and 120 days past due on non-business purpose credits. In addition, a credit may be placed on nonaccrual at any other time Management has serious doubts about further collectability of principal or interest according to the contractual terms, even though the loan is currently performing. A LHFI may remain in accrual status if it is in the process of collection and well-secured. When a LHFI is placed in nonaccrual status, interest accrued but not received is reversed against interest income. Interest payments received on nonaccrual LHFI are applied against principal under the cost-recovery method, until qualifying for return to accrual status. Under the cost-recovery method, interest income is not recognized until the principal balance is reduced to zero. LHFI are restored to accrual status when the ultimate collectability of the total contractual principal and interest is no longer in doubt and the obligation has either been brought current or has performed in accordance with the contractual terms for a reasonable period of time. Purchased Credit Deteriorated (PCD) Loans Purchased loans which have experienced more than insignificant credit deterioration since origination are considered PCD loans. An initial ACL for PCD loans is determined at acquisition using the same ACL methodology as the LHFI. The initial ACL determined on a collective basis is allocated to individual loans. PCD loans are reported at the amortized cost, which equals the loan purchased price plus the initial ACL. The difference between the amortized cost basis of the PCD loan and the par value of the loan is the noncredit premium or discount, which is amortized into interest income over the life of the loan. Subsequent changes to the ACL are recorded through the PCL, LHFI. Upon adoption of FASB ASC Topic 326, Trustmark elected to maintain pools of loans that were previously accounted for under FASB ASC Subtopic 310-30, “Receivables-Loans and Debt Securities Acquired with Deteriorated Credit Quality,” and will continue to account for these pools as a unit of account. Loans are only removed from the existing loan pools if they are written off, paid off or sold. Upon adoption of FASB ASC Topic 326, the ACL was determined for each pool and added to the pool’s carrying value to establish a new amortized cost basis. The difference between the unpaid principal balance of the pool and the new amortized cost basis is the noncredit premium or discount which will be amortized into interest income over the remaining life of the pool. Changes to the ACL after adoption of FASB ASC Topic 326 are recorded through the PCL, LHFI. ACL LHFI Trustmark’s ACL methodology for LHFI is based upon guidance within FASB ASC Subtopic 326-20 as well as applicable regulatory guidance. The ACL on LHFI 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 on LHFI. The ACL on LHFI is an estimate of expected losses inherent within Trustmark’s existing LHFI portfolio. The ACL on LHFI is adjusted through the PCL, LHFI and reduced by the charge off of loan amounts, net of recoveries. The loan loss estimation process involves procedures to appropriately consider the unique characteristics of Trustmark’s LHFI portfolio segments. These segments are further disaggregated into loan classes, the level at which credit risk is estimated. When computing allowance levels, credit loss assumptions are estimated using a model that categorizes loan pools based on loss history, delinquency status and other credit trends and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. Evaluations of the portfolio and individual credits are inherently subjective, as they require estimates, assumptions and judgments as to the facts and circumstances of particular situations. Determining the appropriateness of the allowance is complex and requires judgment by Management about the effect of matters that are inherently uncertain. In future periods, evaluations of the overall LHFI portfolio, in light of the factors and forecasts then prevailing, may result in significant changes in the allowance and credit loss expense. Trustmark estimates the ACL on LHFI using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Trustmark uses a third-party software application to calculate the quantitative portion of the ACL on LHFI using a methodology and assumptions specific to each loan pool. The qualitative portion of the allowance is based on general economic conditions and other internal and external factors affecting Trustmark as a whole as well as specific LHFI. Factors considered include the following: lending policies and procedures, economic conditions and concentrations of credit, nature and volume of the portfolio, performance trends, and external factors. The quantitative and qualitative portions of the allowance are added together to determine the total ACL on LHFI, which reflects Management’s expectations of future conditions based on reasonable and supportable forecasts. The methodology for estimating the amount of expected credit losses reported in the ACL on LHFI 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. 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 ACL for individual loans that do not share risk characteristics with other loans is measured as the difference between the discounted value of expected future cash flows, based on the effective interest rate at origination, and the amortized cost basis of the loan, or the net realizable value. The ACL is the difference between the loan’s net realizable value and its amortized cost basis (net of previous charge-offs and deferred loan fees and costs), except for collateral-dependent loans. 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 the ‘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. If the calculated expected credit loss is determined to be permanent or not recoverable, the amount of the expected credit loss is charged off. Accrued interest receivable is not included in the amortized cost basis of Trustmark’s LHFI and, therefore, excluded from the estimate of credit losses for LHFI. LHFI are charged off against the ACL on LHFI, with any subsequent recoveries credited back to the ACL on LHFI account. Recoveries may not exceed the aggregate of amounts previously charged off. Trustmark’s Loan Policy Manual dictates the guidelines to be followed in determining when a loan is charged off. Commercial purpose LHFI are charged off when a determination is made that the loan is uncollectible and continuance as a bankable asset is not warranted. Consumer LHFI secured by 1-4 family residential real estate are generally charged off or written down to the fair value of the collateral less cost to sell at no later than 180 days of delinquency. Non-real estate consumer purpose LHFI, including both secured and unsecured loans, are generally charged off by 120 days of delinquency. Consumer revolving lines of credit and credit card debt are generally charged off on or prior to 180 days of delinquency. ACL on Off-Balance Sheet Credit Exposures Under FASB ASC Subtopic 326-20, Trustmark is required to estimate expected credit losses for off-balance sheet credit exposures which are not unconditionally cancellable. Trustmark maintains a separate ACL on off-balance sheet credit exposures, including unfunded loan commitments and letters of credit. Expected credit losses for off-balance sheet credit exposures are estimated by calculating a commitment usage factor over the contractual period for exposures that are not unconditionally cancellable by Trustmark. Trustmark calculates a loan pool level unfunded amount for the period. Trustmark views the loan pools as either closed-ended or open-ended. Closed-ended loan pools are those that typically fund up to 100% such as other construction and nonowner-occupied. Open-ended loan pools are those that behave similar to a revolver such as the commercial and industrial and home equity line of credit loan pools. In addition to the unfunded balances, Trustmark uses a funding rate for loan pools that are considered open-ended. Trustmark calculates the funding rate of the open-ended loan pools each period. In order to mitigate volatility and incorporate historical experience in the funding rate, Trustmark uses a twelve-quarter moving average. For the closed-ended loan pools, Trustmark takes a conservative approach and uses a 100% funding rate. The expected funding rate is applied to each pool’s unfunded commitment balances to ensure that reserves will be applied to each pool based on balances expected to be funded based upon historical levels. In addition to the funding rate being applied to the unfunded commitment balance, a reserve rate is applied, which includes both quantitative and a majority of the qualitative aspects of the current period's expected credit loss rate. During 2024, Management implemented a performance trends qualitative factor for unfunded commitments and an External Factor - Credit Quality Review qualitative factor for unfunded commitments. For both qualitative factors, the same assumptions are applied in the unfunded commitment calculation that are used in the funded balance calculation with the only difference being the unfunded commitment calculation includes the funding rates for the unfunded commitments. The reserves for these two qualitative factors are added to the other calculated reserve to get a total reserve for off-balance sheet credit exposures. Adjustments to the ACL on off-balance sheet credit exposures are recorded to the PCL, off-balance sheet credit exposures. 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. Premises and Equipment, Net Premises and equipment are reported at cost, less accumulated depreciation and amortization. Depreciation is charged to expense over the estimated useful lives of the assets, which are up to thirty-nine years for buildings and three to ten years for furniture and equipment. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter. In cases where Trustmark has the right to renew the lease for additional periods, the lease term for the purpose of calculating amortization of the capitalized cost of the leasehold improvements is extended when Trustmark is “reasonably assured” that it will renew the lease. Depreciation and amortization expenses are computed using the straight-line method. Trustmark continually evaluates whether events and circumstances have occurred that indicate that such long-lived assets have become impaired. Measurement of any impairment of such long-lived assets is based on the fair values of those assets. Branch closures and purchased land held for future branch expansion for more than five years are evaluated to determine if the related land, buildings and building improvements should be transferred to assets held for sale in accordance with FASB ASC Topic 360, “Property, Plant and Equipment.” The property is transferred to assets held for sale at the lower of its carrying value or fair value less cost to sell. An impairment loss is recorded at the time of transfer if the carrying value of the assets exceeds the fair value. Impairment losses are recorded as noninterest expense in other expense. MSR Trustmark recognizes as assets the rights to service mortgage loans based on the estimated fair value of the MSR when loans are sold and the associated servicing rights are retained. Trustmark has elected to account for the MSR at fair value. The fair value of the MSR is determined using a valuation model administered by a third party that calculates the present value of estimated future net servicing income. Estimates of fair value involve several assumptions, including the key valuation assumptions about market expectations of future prepayment rates, interest rates and discount rates which are provided by a third-party firm. Prepayment rates are projected using an industry standard prepayment model. The model considers other key factors, such as a wide range of standard industry assumptions tied to specific portfolio characteristics such as remittance cycles, escrow payment requirements, geographic factors, foreclosure loss exposure, VA no-bid exposure, delinquency rates and cost of servicing, including base cost and cost to service delinquent mortgages. Prevailing market conditions at the time of analysis are factored into the accumulation of assumptions and determination of servicing value. Trustmark economically hedges changes in the fair value of the MSR attributable to interest rates. See the section titled “Derivative Financial Instruments – Derivatives Not Designated as Hedging Instruments” of this note for information regarding these derivative instruments. Trustmark receives annual servicing fee income for loans serviced, which is recorded as noninterest income in mortgage banking, net. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Late fees and ancillary fees related to loan servicing are not considered material. Goodwill and Identifiable Intangible Assets Trustmark accounts for goodwill and other intangible assets in accordance with FASB ASC Topic 350, “Intangibles – Goodwill and Other.” Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for Trustmark, or more often if events or circumstances indicate that there may be impairment. Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with a related contract, asset or liability. Trustmark’s identifiable intangible assets primarily relate to core deposits and borrower relationships. These intangibles, which have definite useful lives, are amortized on an accelerated basis over their estimated useful lives. In addition, these intangibles are evaluated for impairment whenever events and changes in circumstances indicate that the carrying amount should be reevaluated. Trustmark also purchased banking charters in order to facilitate its entry into the states of Florida and Texas. These identifiable intangible assets were amortized on a straight-line method over 20 years. Other Real Estate 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. When foreclosed real estate is received in full satisfaction of a loan, the amount, if any, by which the recorded amount of the loan exceeds the estimated fair value of the property is a loss charged against the ACL at the time of foreclosure. If the recorded amount of the loan is less than the estimated fair value of the property, a credit is recorded to write-downs of other real estate at the time of foreclosure. Other real estate is revalued on an annual basis or more often if market conditions necessitate. An other real estate specific reserve may be recorded through other real estate expense for declines in fair value subsequent to foreclosure based on recent appraisals or changes in market conditions. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged against an existing other real estate specific reserve or as noninterest expense in other real estate expense if a reserve does not exist. Costs of operating and maintaining the properties as well as gains or losses on their disposition are also included in other real estate expense as incurred. Improvements made to properties are capitalized if the expenditures are expected to be recovered upon the sale of the properties. Leases Lessor Arrangements Trustmark leases certain types of machinery and equipment to its commercial customers through sales-type and direct financing leases as part of its equipment financing portfolio. Sales-type and direct financing leases are similar to other forms of installment lending in that lessors generally do not retain benefits and risks incidental to ownership of the property subject to the leases. Such arrangements are essentially financing transactions that permit lessees to acquire and use property. Trustmark does not have any significant operating leases in which it is the lessor. As lessor, the sum of all minimum lease payments over the lease term and the estimated residual value, less unearned interest income, is recorded as the net investment in the lease on the commencement date and is included in LHFI on the consolidated balance sheets. Interest income is accrued as earned over the term of the lease based on the net investment in the leases and is recognized in interest and fees on LHFS and LHFI on the consolidated statements of income. Certain fees or costs associated with lease originations are deferred and accreted or amortized to interest income over the life of the lease using the effective interest method. Trustmark’s portfolio of sales-type and direct financing leases generally have remaining lease terms of three to ten 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 at either the residual value or a specified price. Trustmark expects to sell or release the equipment at the end of the lease term. Due to the structure of these leases, there is no selling profit or loss on these transactions. Lessee Arrangements Trustmark has certain contracts that it has identified as leases accor

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 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 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): Years Ended December 31, 2024 2023 2022 Noninterest income: Insurance commissions $ 27,728 $ 57,569 $ 53,721 Gain on sale of discontinued operations, net 228,272 — — Other, net 527 956 1 Total noninterest income 256,527 58,525 53,722 Noninterest expense: Salaries and employee benefits 16,263 36,395 33,193 Services and fees 704 1,673 1,576 Net occupancy - premises 269 975 1,278 Equipment expense 93 298 303 Other expense 2,046 2,882 2,730 Total noninterest expense 19,375 42,223 39,080 Income from discontinued operations before income taxes 237,152 16,302 14,642 Income taxes from discontinued operations 59,353 4,103 3,673 Income from discontinued operations $ 177,799 $ 12,199 $ 10,969 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

Cash and Due from Banks

Cash and Due from Banks	12 Months Ended
	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash and Due from Banks	Note 3 – Cash and Due from Banks Trustmark is no longer required to maintain reserve balances with the Federal Reserve Bank of Atlanta based on a percentage of deposits. Effective March 26, 2020, the Federal Reserve reduced reserve requirement ratios to zero percent, eliminating the reserve requirements for all depository institutions, in order to provide liquidity in the banking system to support lending to households and businesses due to the COVID-19 pandemic.

Securities Available for Sale a

Securities Available for Sale and Held to Maturity	12 Months Ended
	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale and Held to Maturity	Note 4 – 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 December 31, 2024 and 2023 ($ in thousands): Securities Available for Sale Securities Held to Maturity Gross Gross Estimated Gross Gross Estimated Amortized Unrealized Unrealized Fair Amortized Unrealized Unrealized Fair December 31, 2024 Cost Gains Losses Value Cost Gains Losses Value U.S. Treasury securities $ 203,524 $ 548 $ ( 1,403 ) $ 202,669 $ 29,842 $ 1 $ ( 522 ) $ 29,321 U.S. Government agency obligations 41,194 — ( 2,387 ) 38,807 — — — — Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA 31,365 3 ( 2,957 ) 28,411 16,218 — ( 844 ) 15,374 Issued by FNMA and FHLMC 1,091,122 1,610 ( 22,194 ) 1,070,538 423,372 94 ( 23,853 ) 399,613 Other residential mortgage-backed securities Issued or guaranteed by FNMA, — — — — 123,685 — ( 8,004 ) 115,681 Commercial mortgage-backed securities Issued or guaranteed by FNMA, 352,332 827 ( 1,050 ) 352,109 742,268 3 ( 43,153 ) 699,118 Total $ 1,719,537 $ 2,988 $ ( 29,991 ) $ 1,692,534 $ 1,335,385 $ 98 $ ( 76,376 ) $ 1,259,107 December 31, 2023 U.S. Treasury securities $ 396,179 $ — $ ( 23,811 ) $ 372,368 $ 29,068 $ — $ ( 26 ) $ 29,042 U.S. Government agency obligations 6,207 1 ( 416 ) 5,792 — — — — Obligations of states and political subdivisions — — — — 340 — — 340 Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA 25,744 4 ( 2,613 ) 23,135 13,005 — ( 497 ) 12,508 Issued by FNMA and FHLMC 1,338,256 32 ( 161,490 ) 1,176,798 469,593 — ( 18,205 ) 451,388 Other residential mortgage-backed securities Issued or guaranteed by FNMA, 92,076 — ( 6,002 ) 86,074 154,466 — ( 10,113 ) 144,353 Commercial mortgage-backed securities Issued or guaranteed by FNMA, 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. On 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 December 31, 2024 , the net unamortized, unrealized loss on transferred securities included in accumulated other comprehensive income (loss) in the accompanying balance sheet totaled $ 46.6 million compared to approximately $ 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 DCF analysis using the effective interest rate as of the security’s purchase date. The amount of credit loss Trustmark records will be 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. At both December 31, 2024 and 2023 , the results of the loss analysis performed 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 December 31, 2024 and 2023 , accrued interest receivable totaled $ 5.0 million and $ 3.7 million, respectively, for securities available for sale and was reported in other assets on the accompanying consolidated balance sheet. Securities Held to Maturity At December 31, 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 probability of default and loss given default assumptions, the total amount of current expected credit losses was zero at December 31, 2024 and immaterial at December 31, 2023. Therefore, no reserve was recorded at either December 31, 2024 or December 31, 2023. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity. At December 31, 2024 and 2023 , accrued interest receivable totaled $ 2.4 million and $ 2.6 million for securities held to maturity and was reported in other assets on the accompanying consolidated balance sheet. At both December 31, 2024 and 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 December 31, 2024 and 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 December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Aaa $ 1,335,385 $ 1,425,939 Not Rated (1) — 340 Total $ 1,335,385 $ 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 ACL has not been recorded and segregated by length of impairment at December 31, 2024 and 2023 ($ in thousands): Less than 12 Months 12 Months or More Total Gross Gross Gross Estimated Unrealized Estimated Unrealized Estimated Unrealized December 31, 2024 Fair Value Losses Fair Value Losses Fair Value Losses U.S. Treasury securities $ 123,277 $ ( 1,925 ) $ — $ — $ 123,277 $ ( 1,925 ) U.S. Government agency obligations 38,807 ( 2,387 ) — — 38,807 ( 2,387 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 15,802 ( 293 ) 27,803 ( 3,508 ) 43,605 ( 3,801 ) Issued by FNMA and FHLMC 981,747 ( 13,848 ) 237,487 ( 32,199 ) 1,219,234 ( 46,047 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 115,681 ( 8,004 ) 115,681 ( 8,004 ) Commercial mortgage-backed Issued or guaranteed by FNMA, 164,971 ( 536 ) 767,566 ( 43,667 ) 932,537 ( 44,203 ) Total $ 1,324,604 $ ( 18,989 ) $ 1,148,537 $ ( 87,378 ) $ 2,473,141 $ ( 106,367 ) 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 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. Securities Gains and Losses Realized gains and losses are determined using the specific identification method and are included in noninterest income (loss) as securities gains (losses), net. For the periods presented, gross realized gains or losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands): Years Ended December 31, Available for Sale 2024 2023 2022 Proceeds from calls and sales of securities $ 1,378,272 $ 4,796 $ — Gross realized gains — 47 — Gross realized losses ( 182,792 ) ( 8 ) — 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 securities 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 $ 1.910 billion and $ 2.321 billion at December 31, 2024 and 2023, respectively, were pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law. At both December 31, 2024 and 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 December 31, 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 Available for Sale Held to Maturity Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value Due in one year or less $ 45,777 $ 45,976 $ — $ — Due after one year through five years 62,388 62,737 29,842 29,321 Due after five years through ten years 136,553 132,763 — — 244,718 241,476 29,842 29,321 Mortgage-backed securities 1,474,819 1,451,058 1,305,543 1,229,786 Total $ 1,719,537 $ 1,692,534 $ 1,335,385 $ 1,259,107

LHFI and ACL, LHFI

LHFI and ACL, LHFI	12 Months Ended
	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
LHFI and ACL, LHFI	Note 5 – LHFI and ACL, LHFI At December 31, 2024 and 2023, LHFI consisted of the following ($ in thousands): December 31, 2024 2023 Loans secured by real estate: Construction, land development and other land $ 587,244 $ 642,886 Other secured by 1-4 family residential properties 650,550 622,397 Secured by nonfarm, nonresidential properties 3,533,282 3,489,434 Other real estate secured 1,633,830 1,312,551 Other loans secured by real estate: Other construction 829,904 867,793 Secured by 1-4 family residential properties 2,298,993 2,282,318 Commercial and industrial loans 1,840,722 1,922,910 Consumer loans 156,569 165,734 State and other political subdivision loans 969,836 1,088,466 Other commercial loans and leases 589,012 556,035 LHFI 13,089,942 12,950,524 Less ACL 160,270 139,367 Net LHFI $ 12,929,672 $ 12,811,157 Accrued interest receivable is not included in the amortized cost basis of Trustmark’s LHFI. At December 31, 2024 and 2023 , accrued interest receivable for LHFI totaled $ 64.7 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 December 31, 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. Related Party Loans At December 31, 2024 and 2023 , loans to certain executive officers and directors, including their immediate families and companies in which they are principal owners, totaled $ 33.1 million and $ 41.1 million, respectively. During 2024 , $ 235.9 million of new loan advances were made, while repayments were $ 243.9 million. There were no increases in loans due to changes in executive officers and directors. Nonaccrual and Past Due LHFI No material interest income was recognized in the income statement on nonaccrual LHFI for each of the years in the three-year period ended December 31, 2024. 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 December 31, 2024 and 2023 ($ in thousands): December 31, 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 $ — $ 366 $ 159 Other secured by 1-4 family residential properties 521 7,275 266 Secured by nonfarm, nonresidential properties 426 13,061 — Other real estate secured 1,904 1,984 — Other loans secured by real estate: Secured by 1-4 family residential properties 1,533 31,583 3,253 Commercial and industrial loans 16 24,525 — Consumer loans — 236 414 Other commercial loans and leases — 1,079 — Total $ 4,400 $ 80,109 $ 4,092 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 loans) at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total LHFI Loans secured by real estate: Construction, land development and other land $ 199 $ — $ 324 $ 523 $ 586,721 $ 587,244 Other secured by 1-4 family residential properties 5,656 1,821 3,223 10,700 639,850 650,550 Secured by nonfarm, nonresidential properties 1,488 380 3,111 4,979 3,528,303 3,533,282 Other real estate secured 1,979 — 28 2,007 1,631,823 1,633,830 Other loans secured by real estate: Other construction — — — — 829,904 829,904 Secured by 1-4 family residential properties 17,898 7,111 21,524 46,533 2,252,460 2,298,993 Commercial and industrial loans 1,114 13,300 8,835 23,249 1,817,473 1,840,722 Consumer loans 1,930 600 414 2,944 153,625 156,569 State and other political subdivision loans 24 — — 24 969,812 969,836 Other commercial loans and leases 168 67 69 304 588,708 589,012 Total $ 30,456 $ 23,279 $ 37,528 $ 91,263 $ 12,998,679 $ 13,089,942 December 31, 2023 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total LHFI Loans secured by real estate: Construction, land development and other land $ 93 $ 507 $ 2,362 $ 2,962 $ 639,924 $ 642,886 Other secured by 1-4 family residential properties 4,493 1,687 2,716 8,896 613,501 622,397 Secured by nonfarm, nonresidential properties 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 : Year Ended December 31, 2024 Payment Concessions Term Extensions Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 3,456 $ 3,456 0.53 % Other loans secured by real estate: Secured by 1-4 family residential properties — 129 129 0.01 % Commercial and industrial loans 6,207 — 6,207 0.34 % Total $ 6,207 $ 3,585 $ 9,792 0.07 % Year Ended December 31, 2023 Payment Concessions Term Extensions Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 805 $ 805 0.13 % Secured by nonfarm, nonresidential properties — 359 359 0.01 % Other loans secured by real estate: Secured by 1-4 family residential properties — 1,148 1,148 0.05 % Commercial and industrial loans 242 — 242 0.01 % Consumer loans — 36 36 0.02 % Other commercial loans and leases 116 31 147 0.03 % Total $ 358 $ 2,379 $ 2,737 0.02 % The following tables detail the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the periods presented : Year Ended December 31, 2024 Financial Effect Payment Concessions Term Extensions Loans secured by real estate: Other secured by 1-4 family residential properties Modified five loans and twenty-five lines of credit to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified nine loans to amortize over weighted average 35 months Commercial and industrial loans Thirty-four month principal payment deferral Year Ended December 31, 2023 Financial Effect Payment Concessions Term Extensions 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 3.4 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 deferrals One loan renewed and extended maturity by seven months Trustmark had no unused commitments on modified loans to borrowers experiencing financial difficulty at December 31, 2024 or December 31, 2023. During the year ended December 31, 2024, Trustmark had a payment concession balance of $ 6.2 million and a term extension balance of $ 70 thousand at default for LHFI in the commercial and industrial portfolio and the other secured by 1-4 family residential properties portfolio, respectively, that had a payment default and were modified within the twelve months prior to that default to borrowers experiencing financial difficulty. During the year ended December 31, 2023, Trustmark had payment concession balances of $ 116 thousand at default for LHFI in the other commercial loans and leases portfolio that had a payment default and were modified within the twelve months prior to that default to borrowers experiencing financial difficulty. 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): Year Ended December 31, 2024 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 739 $ 128 $ 50 $ 917 $ 2,539 $ 3,456 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 129 129 Commercial and industrial loans — — 6,207 6,207 — 6,207 Total $ 739 $ 128 $ 6,257 $ 7,124 $ 2,668 $ 9,792 Year Ended December 31, 2023 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 290 $ 17 $ — $ 307 $ 498 $ 805 Secured by nonfarm, nonresidential properties — — — — 359 359 Other loans secured by real estate: Secured by 1-4 family residential properties 64 — — 64 1,084 1,148 Commercial and industrial loans — — — — 242 242 Consumer loans 17 — — 17 19 36 Other commercial loans and leases — — — — 147 147 Total $ 371 $ 17 $ — $ 388 $ 2,349 $ 2,737 Collateral-Dependent Loans The following tables present the amortized cost basis of collateral-dependent loans by class of loans and collateral type at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 521 $ — $ — $ 521 Secured by nonfarm, nonresidential properties 9,783 — — 9,783 Other real estate secured 1,904 — — 1,904 Other loans secured by real estate: Secured by 1-4 family residential properties 1,533 — — 1,533 Commercial and industrial loans — 1,818 20,685 22,503 Other commercial loans and leases — — 896 896 Total $ 13,741 $ 1,818 $ 21,581 $ 37,140 December 31, 2023 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Construction, land development and other land $ 2,020 $ — $ — $ 2,020 Other secured by 1-4 family residential properties 946 — — 946 Secured by nonfarm, nonresidential properties 20,812 — — 20,812 Other loans secured by real estate: Secured by 1-4 family residential properties 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. During 2024, one collateral dependent relationship had a decrease 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. • 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 2024, four 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 and leases – Loans and leases 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 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 all bank regulatory agencies and are generally equally applied by 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 $250 thousand or more. In addition, periodic reviews of significant development, construction, multi-family, nonowner-occupied and other commercial credits are performed. These reviews assess each particular project with respect to location, project valuations, progress of completion, leasing status, current financial information, rents, operating expenses, cash flow, adherence to budget and projections and other information that is pertinent to the particular type of credit as applicable. Summary results are reviewed by Senior and Regional Credit Officers in addition to the Chief Credit Officer with a determination made as to the appropriateness of existing risk ratings and accrual status. Consumer Credits The Retail Credit Review Committee, Management Credit Policy Committee and the Enterprise Risk Committee review the volume and percentage of consumer loan delinquencies and losses to monitor the overall quality of the consumer portfolio. Trustmark monitors the levels and severity of past due consumer LHFI on a daily basis through its collection activities. A detailed assessment of consumer LHFI delinquencies is performed monthly at both a product and market level. The tables below present the amortized cost basis of loans by credit quality indicator and class of loans based on analyses performed at December 31, 2024 and 2023 ($ in thousands): Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Commercial LHFI Loans secured by real estate: Construction, land development Pass - RR 1 through RR 6 $ 324,775 $ 83,503 $ 33,580 $ 23,124 $ 8,145 $ 1,587 $ 42,469 $ 517,183 Special Mention - RR 7 2,165 — — — — — 2,002 4,167 Substandard - RR 8 17 62 226 983 — — 176 1,464 Doubtful - RR 9 — — — — — — — — Total 326,957 83,565 33,806 24,107 8,145 1,587 44,647 522,814 Current period gross — — — — — ( 24 ) — ( 24 ) Other secured by 1-4 family residential Pass - RR 1 through RR 6 $ 31,013 $ 24,339 $ 22,693 $ 24,090 $ 11,635 $ 2,106 $ 7,742 $ 123,618 Special Mention - RR 7 27 — — 32 — — — 59 Substandard - RR 8 125 375 555 328 — 191 27 1,601 Doubtful - RR 9 — — — — — — — — Total 31,165 24,714 23,248 24,450 11,635 2,297 7,769 125,278 Current period gross — — — — — ( 16 ) — ( 16 ) Secured by nonfarm, nonresidential Pass - RR 1 through RR 6 $ 542,747 $ 441,159 $ 880,511 $ 429,929 $ 464,504 $ 392,802 $ 127,812 $ 3,279,464 Special Mention - RR 7 16,266 — 52,093 — 17,978 3,335 — 89,672 Substandard - RR 8 10,007 7,321 41,686 37,915 25,601 41,598 — 164,128 Doubtful - RR 9 11 — — — — 7 — 18 Total 569,031 448,480 974,290 467,844 508,083 437,742 127,812 3,533,282 Current period gross — — — ( 2,529 ) — ( 16 ) — ( 2,545 ) Other real estate secured: Pass - RR 1 through RR 6 $ 152,314 $ 157,827 $ 726,814 $ 233,861 $ 137,786 $ 43,478 $ 7,434 $ 1,459,514 Special Mention - RR 7 — 7,450 15,481 41,019 — — 263 64,213 Substandard - RR 8 14,610 — 26,685 42,636 252 25,419 244 109,846 Doubtful - RR 9 — — — — — — — — Total 166,924 165,277 768,980 317,516 138,038 68,897 7,941 1,633,573 Current period gross — — ( 89 ) — — — — ( 89 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Commercial LHFI Other loans secured by real estate: Other construction Pass - RR 1 through RR 6 $ 115,221 $ 410,064 $ 201,526 $ 20,647 $ — $ — $ 18,400 $ 765,858 Special Mention - RR 7 — 2,250 24,557 — — — — 26,807 Substandard - RR 8 — — 17,820 — 19,419 — — 37,239 Doubtful - RR 9 — — — — — — — — Total 115,221 412,314 243,903 20,647 19,419 — 18,400 829,904 Current period gross — ( 14 ) ( 2,493 ) — — — — ( 2,507 ) Commercial and industrial loans: Pass - RR 1 through RR 6 $ 505,557 $ 365,724 $ 231,875 $ 98,318 $ 45,551 $ 27,456 $ 462,740 $ 1,737,221 Special Mention - RR 7 — 564 14,066 15 — — 13,836 28,481 Substandard - RR 8 7,204 1,113 39,698 5,091 891 12,905 7,598 74,500 Doubtful - RR 9 227 — 35 145 1 2 110 520 Total 512,988 367,401 285,674 103,569 46,443 40,363 484,284 1,840,722 Current period gross ( 341 ) ( 1,211 ) ( 640 ) ( 3,251 ) ( 158 ) ( 3,132 ) ( 315 ) ( 9,048 ) State and other political subdivision loans: Pass - RR 1 through RR 6 $ 156,130 $ 82,532 $ 212,528 $ 135,251 $ 78,543 $ 302,709 $ 2,143 $ 969,836 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 — — — — — — — — Doubtful - RR 9 — — — — — — — — Total 156,130 82,532 212,528 135,251 78,543 302,709 2,143 969,836 Current period gross — — — — — — — — Other commercial loans and leases: Pass - RR 1 through RR 6 $ 157,619 $ 148,099 $ 7,371 $ 9,800 $ 15,606 $ 45,227 $ 203,345 $ 587,067 Special Mention - RR 7 — — 116 48 — — — 164 Substandard - RR 8 55 682 116 12 — — 901 1,766 Doubtful - RR 9 9 — 6 — — — — 15 Total 157,683 148,781 7,609 9,860 15,606 45,227 204,246 589,012 Current period gross ( 25 ) — ( 38 ) — — ( 32 ) — ( 95 ) Total commercial LHFI $ 2,036,099 $ 1,733,064 $ 2,550,038 $ 1,103,244 $ 825,912 $ 898,822 $ 897,242 $ 10,044,421 Total commercial LHFI $ ( 366 ) $ ( 1,225 ) $ ( 3,260 ) $ ( 5,780 ) $ ( 158 ) $ ( 3,220 ) $ ( 315 ) $ ( 14,324 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Consumer LHFI Loans secured by real estate: Construction, land development and Current $ 31,478 $ 22,752 $ 4,302 $ 2,762 $ 930 $ 1,804 $ — $ 64,028 Past due 30-89 days — 47 11 — — 106 — 164 Past due 90 days or more 91 — — 68 — — — 159 Nonaccrual — 31 21 4 — 23 — 79 Total 31,569 22,830 4,334 2,834 930 1,933 — 64,430 Current period gross — — — — — ( 8 ) — ( 8 ) Other secured by 1-4 family residential Current $ 24,756 $ 17,202 $ 6,733 $ 5,260 $ 3,651 $ 9,563 $ 445,598 $ 512,763 Past due 30-89 days 569 38 67 66 3 579 4,524 5,846 Past due 90 days or more 21 — 8 — — 17 219 265 Nonaccrual 71 5 69 44 103 593 5,513 6,398 Total 25,417 17,245 6,877 5,370 3,757 10,752 455,854 525,272 Current period gross ( 29 ) ( 87 ) ( 233 ) ( 40 ) ( 31 ) ( 76 ) — ( 496 ) Other real estate secured: Current $ 161 $ — $ — $ — $ 68 $ 28 $ — $ 257 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total 161 — — — 68 28 — 257 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Consumer LHFI Other loans secured by real estate: Secured by 1-4 family residential properties Current $ 274,500 $ 224,266 $ 808,527 $ 459,191 $ 161,856 $ 314,906 $ — $ 2,243,246 Past due 30-89 days 169 4,405 9,883 4,082 814 1,558 — 20,911 Past due 90 days or more 4 1,263 1,098 461 170 257 — 3,253 Nonaccrual 568 3,744 17,306 5,009 1,394 3,562 — 31,583 Total 275,241 233,678 836,814 468,743 164,234 320,283 — 2,298,993 Current period gross — ( 228 ) ( 9,910 ) ( 143 ) ( 6 ) ( 17 ) — ( 10,304 ) Consumer loans: Current $ 55,908 $ 22,226 $ 12,922 $ 4,654 $ 1,188 $ 105 $ 56,423 $ 153,426 Past due 30-89 days 844 396 323 4 — 13 913 2,493 Past due 90 days or more 38 67 17 4 — — 288 414 Nonaccrual 25 49 63 61 19 — 19 236 Total 56,815 22,738 13,325 4,723 1,207 118 57,643 156,569 Current period gross ( 5,929 ) ( 785 ) ( 470 ) ( 131 ) ( 100 ) ( 337 ) ( 2,065 ) ( 9,817 ) Total consumer LHFI $ 389,203 $ 296,491 $ 861,350 $ 481,670 $ 170,196 $ 333,114 $ 513,497 $ 3,045,521 Total consumer LHFI $ ( 5,958 ) $ ( 1,100 ) $ ( 10,613 ) $ ( 314 ) $ ( 137 ) $ ( 438 ) $ ( 2,065 ) $ ( 20,625 ) Total LHFI $ 2,425,302 $ 2,029,555 $ 3,411,388 $ 1,584,914 $ 996,108 $ 1,231,936 $ 1,410,739 $ 13,089,942 Total current period $ ( 6,324 ) $ ( 2,325 ) $ ( 13,873 ) $ ( 6,094 ) $ ( 295 ) $ ( 3,658 ) $ ( 2,380 ) $ ( 34,949 ) 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 development 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 residential 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, nonresidential 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 estate: 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 loans: 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 subdivision loans: 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 -

Premises and Equipment, Net

Premises and Equipment, Net	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Premises and Equipment, Net	Note 6 – Premises and Equipment, Net At December 31, 2024 and 2023, premises and equipment, net consisted of the following ($ in thousands): December 31, 2024 2023 Land $ 56,610 $ 56,747 Buildings and leasehold improvements 249,405 246,759 Furniture and equipment 227,329 210,158 Total cost of premises and equipment 533,344 513,664 Less accumulated depreciation and amortization 302,201 286,383 Premises and equipment, net 231,143 227,281 Finance lease right-of-use assets 3,299 3,751 Assets held for sale 968 1,197 Total premises and equipment, net $ 235,410 $ 232,229 There were two properties included in assets held for sale at December 31, 2024 compared to three properties at December 31, 2023 . These properties were transferred from premises and equipment, net to assets held for sale due to Trustmark’s intent to sell the properties over the subsequent twelve months as a result of its strategic initiatives. No property valuation adjustments were recognized in other expense for 2024 compared to $ 470 thousand for 2023 and $ 400 thousand for 2022. Depreciation and amortization of premises and equipment totaled $ 18.7 million in 2024 , $ 17.4 million in 2023 and $ 16.2 million in 2022 .

Mortgage Banking

Mortgage Banking	12 Months Ended
	Dec. 31, 2024
Mortgage Banking [Abstract]
Mortgage Banking	Note 7 – Mortgage Banking MSR The activity in the MSR is detailed in the table below for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 Balance at beginning of period $ 131,870 $ 129,677 Origination of servicing assets 13,291 13,712 Change in fair value: Due to market changes 5,801 ( 1,489 ) Due to runoff ( 11,645 ) ( 10,030 ) Balance at end of period $ 139,317 $ 131,870 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 December 31, 2024 , the fair value of the MSR included an assumed average prepayment speed of 8 CPR and an average discount rate of 10.65 % compared to an assumed average prepayment speed of 9 CPR and an average discount rate of 10.07 % at December 31, 2023. Mortgage Loans Sold/Serviced During 2024, 2023 and 2022 , Trustmark sold $ 1.141 billion, $ 1.136 billion and $ 1.243 billion, respectively, of residential mortgage loans. Gain on sales of loans, net totaled $ 19.3 million in 2024 , $ 15.3 million in 2023 and $ 20.2 million in 2022 . Trustmark receives annual servicing fee income approximating 0.32 % of the outstanding balance of the underlying loans, which totaled $ 28.0 million in 2024 , $ 26.9 million in 2023 and $ 26.0 million in 2022. The gains on the sale of residential mortgage loans and the annual servicing fee are both recorded to noninterest income in mortgage banking, net in the accompanying consolidated statements of income. The investors and the securitization trusts have no recourse to the assets of Trustmark for failure of debtors to pay when due. The table below details the mortgage loans sold and serviced for others at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Federal National Mortgage Association $ 4,821,246 $ 4,826,028 Government National Mortgage Association 3,695,419 3,510,983 Federal Home Loan Mortgage Corporation 213,358 112,352 Other 32,686 28,012 Total mortgage loans sold and serviced for others $ 8,762,709 $ 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 December 31, 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.

Goodwill and Identifiable Intan

Goodwill and Identifiable Intangible Assets	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Identifiable Intangible Assets	Note 8 – Goodwill and Identifiable Intangible Assets The goodwill and identifiable intangible assets of FBBI are included in discontinued operations, and as a result, have been excluded from the amounts below. Goodwill The table below illustrates goodwill by segment for the years ended December 31, 2024 and 2023 ($ in thousands): General Banking Balance as of January 1, 2023 $ 334,605 Adjustment during 2023 — Balance as of December 31, 2023 334,605 Adjustment during 2024 — Balance as of December 31, 2024 $ 334,605 Trustmark’s General Banking Segment delivers a full range of banking services to consumer, corporate, small and middle-market businesses through its extensive branch network. Trustmark performed goodwill impairment tests for the General Banking Segment during 2024, 2023 and 2022 . Based on these tests, Trustmark concluded that the fair value of the General Banking Segment exceeded the book value and no impairment charge was required. Identifiable Intangible Assets At December 31, 2024 and 2023, identifiable intangible assets consisted of the following ($ in thousands): December 31, 2024 December 31, 2023 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Core deposit intangibles $ 87,674 $ 87,548 $ 126 $ 87,674 $ 87,438 $ 236 Banking charters — — — 1,325 1,325 — Total $ 87,674 $ 87,548 $ 126 $ 88,999 $ 88,763 $ 236 Trustmark recorded $ 110 thousand of amortization of identifiable intangible assets in 2024 , $ 290 thousand in 2023 and $ 985 thousand in 2022 . Trustmark estimates that amortization expense for identifiable intangible assets will be $ 126 thousand in 2025 and no ne in the following years. Trustmark continually evaluates whether events and circumstances have occurred that indicate that identifiable intangible assets have become impaired. Measurement of any impairment of such identifiable intangible assets is based on the fair values of those assets. There were no impairment losses on identifiable intangible assets recorded during 2024, 2023 or 2022. The following table illustrates the carrying amounts and remaining weighted-average amortization periods of identifiable intangible assets at December 31, 2024 ($ in thousands): Remaining Weighted- Average Net Carrying Amortization Amount Period in Years Core deposit intangibles $ 126 1.0

Other Real Estate

Other Real Estate	12 Months Ended
	Dec. 31, 2024
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate	Note 9 – Other Real Estate At December 31, 2024, Trustmark’s geographic other real estate distribution was primarily concentrated in its Alabama, Mississippi Tennessee 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 these regions. For the periods presented, changes and gains (losses), net on other real estate were as follows ($ in thousands): Years Ended December 31, 2024 2023 2022 Balance at beginning of period $ 6,867 $ 1,986 $ 4,557 Additions 6,782 7,237 1,533 Disposals ( 6,084 ) ( 2,555 ) ( 4,142 ) (Write-downs) recoveries ( 1,648 ) 199 38 Balance at end of period $ 5,917 $ 6,867 $ 1,986 Gains (losses), net on the sale of other real estate $ ( 1,104 ) $ ( 145 ) $ ( 1,006 ) At December 31, 2024 and 2023, other real estate by type of property consisted of the following ($ in thousands): December 31, 2024 2023 Construction, land development and other land properties $ 46 $ — 1-4 family residential properties 2,260 1,977 Nonfarm, nonresidential properties 3,611 4,835 Other real estate properties — 55 Total other real estate $ 5,917 $ 6,867 At December 31, 2024 and 2023, other real estate by geographic location consisted of the following ($ in thousands): December 31, 2024 2023 Alabama $ 170 $ 1,397 Mississippi (1) 2,407 1,242 Tennessee (2) 1,079 — Texas 2,261 4,228 Total other real estate $ 5,917 $ 6,867 (1) Mississippi includes Central and Southern Mississippi Regions. (2) Tennessee includes Memphis, Tennessee and Northern Mississippi Regions. At December 31, 2024 and 2023 , the balance of other real estate included $ 2.3 million and $ 2.0 million, respectively, of foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property. At December 31, 2024 and 2023 , the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process was $ 7.6 million and $ 6.4 million, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Leases	Note 10 – 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 $ 12.7 million and $ 3.2 million for the years ended December 31, 2024 and 2023, 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 at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Leases receivable $ 282,771 $ 161,319 Unearned income ( 45,585 ) ( 29,011 ) Initial direct costs 2,252 1,326 Unguaranteed lease residual 7,084 4,101 Total net investment $ 246,522 $ 137,735 The table below details the minimum future lease payments for Trustmark's leases receivable at December 31, 2024 ($ in thousands): December 31, 2024 2025 $ 50,494 2026 49,906 2027 62,457 2028 52,086 2029 38,486 Thereafter 29,342 Total leases receivable $ 282,771 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 table below details the components of net lease cost for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Finance leases Amortization of right-of-use assets $ 452 $ 786 $ 1,479 Interest on lease liabilities 148 163 188 Operating lease cost 5,075 4,787 4,577 Short-term lease cost 230 229 307 Variable lease cost 841 840 1,080 Sublease income ( 122 ) ( 12 ) ( 168 ) Net lease cost $ 6,624 $ 6,793 $ 7,463 The table below details the cash payments included in the measurement of lease liabilities during the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Finance leases Operating cash flows included in operating activities $ 148 $ 163 $ 188 Financing cash flows included in payments under finance lease 424 721 1,409 Operating leases Operating cash flows (fixed payments) included in other operating 4,848 3,666 4,242 Operating cash flows (liability reduction) included in other operating 3,473 3,204 3,514 The table below details balance sheet information, as well as weighted-average lease terms and discount rates, related to leases at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Finance lease right-of-use assets, net of accumulated depreciation $ 3,299 $ 3,751 Finance lease liabilities 3,910 4,334 Operating lease right-of-use assets 34,668 35,711 Operating lease liabilities 38,698 39,097 Weighted-average lease term Finance leases 7.35 years 8.34 years Operating leases 9.31 years 10.28 years Weighted-average discount rate Finance leases 3.61 % 3.61 % Operating leases 3.72 % 3.67 % At December 31, 2024, future minimum rental commitments under finance and operating leases were as follows ($ in thousands): Finance Leases Operating Leases 2025 $ 584 $ 5,288 2026 589 5,161 2027 594 5,193 2028 599 4,824 2029 633 4,655 Thereafter 1,454 21,258 Total minimum lease payments 4,453 46,379 Less imputed interest ( 543 ) ( 7,681 ) Lease liabilities $ 3,910 $ 38,698

Deposits

Deposits	12 Months Ended
	Dec. 31, 2024
Deposits [Abstract]
Deposits	Note 11 – Deposits At December 31, 2024 and 2023, deposits consisted of the following ($ in thousands): December 31, 2024 2023 Noninterest-bearing demand $ 3,073,565 $ 3,197,620 Interest-bearing demand 5,453,708 4,947,626 Savings 3,387,984 4,047,853 Time 3,192,918 3,376,664 Total $ 15,108,175 $ 15,569,763 Interest expense on deposits by type consisted of the following for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Interest-bearing demand $ 148,888 $ 121,138 $ 16,409 Savings 30,121 28,605 9,654 Time 150,372 96,208 3,006 Total $ 329,381 $ 245,951 $ 29,069 Time deposits that exceed the FDIC insurance limit of $250 thousand totaled $ 935.4 million and $ 822.4 million at December 31, 2024 and 2023, respectively. The maturities of interest-bearing deposits at December 31, 2024, are as follows ($ in thousands): 2025 $ 3,090,620 2026 75,164 2027 15,143 2028 5,764 2029 5,169 Thereafter 1,058 Total time deposits 3,192,918 Interest-bearing deposits with no stated maturity 8,841,692 Total interest-bearing deposits $ 12,034,610

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Borrowings	Note 12 - Borrowings 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 are secured by securities with a carrying amount of $ 40.3 million and $ 61.6 million at December 31, 2024 and 2023, respectively. At both December 31, 2024 and 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 December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Mortgage-backed securities Residential mortgage pass-through securities Issued by FNMA and FHLMC $ 11,685 $ 28,600 Other residential mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 7,487 526 Commercial mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 10,169 — Total securities sold under repurchase agreements $ 29,341 $ 29,126 Other Borrowings At December 31, 2024 and 2023, other borrowings consisted of the following ($ in thousands): December 31, 2024 2023 FHLB advances $ 200,000 $ 400,058 Serviced GNMA loans eligible for repurchase 97,631 78,838 Finance lease liabilities 3,910 4,334 Total other borrowings $ 301,541 $ 483,230 FHLB Advances At both December 31, 2024 and 2023 , Trustmark had no outstanding short-term FHLB advances with the FHLB of Atlanta. At December 31, 2024 , Trustmark had no outstanding long-term FHLB advances with the FHLB of Atlanta, compared to one outstanding long-term FHLB advance with the FHLB of Atlanta totaling $ 58 thousand at December 31, 2023 . This advance was assumed through the BancTrust merger and had a fixed interest rate of 0.08 %. At December 31, 2023 , this advance had a remaining maturity of 2.71 years. There was no fair market value adjustment associated with the BancTrust merger included in the FHLB advances at December 31, 2023. Trustmark’s FHLB advance was collateralized by securities held in safekeeping with the FHLB of Atlanta. At December 31, 2024 , Trustmark had two outstanding short-term FHLB advances totaling $ 200.0 million and no long-term FHLB advances with the FHLB of Dallas, compared to five outstanding short-term FHLB advances totaling $ 400.0 million and no long-term FHLB advances with the FHLB of Dallas at December 31, 2023. The outstanding short-term advances with the FHLB of Dallas at December 31, 2024 had fixed rates of 4.55 % and 4.65 % with balances of $ 100.0 million each. The outstanding short-term FHLB advances had a weighted-average remaining maturity of 8 days with a weighted-average cost of 4.60 % at December 31, 2024 , compared to a weighted-average remaining maturity of 9 days with a weighted-average cost of 5.54 % at December 31, 2023. Trustmark incurred $ 16.8 million of interest expense on short-term FHLB advances in 2024 , compared to $ 49.9 million of interest expense in 2023 and $ 4.8 million of interest expense in 2022 . Trustmark incurred no interest expense on long-term FHLB advances in 2024, 2023 and 2022. At December 31, 2024 and 2023 , Trustmark had $ 4.292 billion and $ 4.003 billion, respectively, available in additional borrowing capacity from the FHLB of Dallas. Subordinated Notes During 2020, Trustmark agreed to issue and sell $ 125.0 million aggregate principal amount of its 3.625 % Fixed-to-Floating Rate Subordinated Notes (the Notes) due December 1, 2030 . The Notes were sold at an underwriting discount of 1.2 %, resulting in net proceeds to Trustmark of $ 123.5 million before deducting offering expenses. At December 31, 2024 and 2023 , the carrying amount of the Notes was $ 123.7 million and $ 123.5 million, respectively. The Notes are unsecured obligations and are subordinated in right of payment to all of Trustmark’s existing and future senior indebtedness, whether secured or unsecured. The Notes are obligations of Trustmark only and are not obligations of, and are not guaranteed by, any of its subsidiaries, including TNB. From the date of issuance until November 30, 2025, the Notes bear interest at a fixed rate of 3.625 % per year, payable semi-annually in arrears on June 1 and December 1 of each year. Beginning December 1, 2025, the Notes will bear interest at a floating rate per year equal to the Benchmark rate, which is the Three-Month Term Secured Overnight Financing Rate (SOFR) , plus 338.7 basis points, payable quarterly in arrears on March 1, June 1, September 1 and December 1 of each year. The Notes qualify as Tier 2 capital for Trustmark. The Notes may be redeemed at Trustmark’s option under certain circumstances. Trustmark intends to use the net proceeds for general corporate purposes. Junior Subordinated Debt Securities On August 18, 2006, Trustmark completed a private placement of $ 60.0 million of trust preferred securities through a newly formed Delaware trust affiliate, Trustmark Preferred Capital Trust I (the Trust). The trust preferred securities mature September 30, 2036 , are redeemable at Trustmark’s option and bear interest at a variable rate per annum equal to the three-month Chicago Mercantile Exchange, Inc. (CME) SOFR plus a spread adjustment of 0.26 % and a margin of 1.72 %. Under applicable regulatory guidelines, these trust preferred securities qualify as Tier 1 capital. The proceeds from the sale of the trust preferred securities were used by the Trust to purchase $ 61.9 million in aggregate principal amount of Trustmark’s junior subordinated debentures. The debentures were issued pursuant to a Junior Subordinated Indenture, dated August 18, 2006, between Trustmark, as issuer, and Wilmington Trust Company, National Association, as trustee. Like the trust preferred securities, the debentures bear interest at a variable rate per annum equal to the three-month CME SOFR plus a spread adjustment of 0.26 % and a margin of 1.72 % and mature on September 30, 2036 . The debentures may be redeemed at Trustmark’s option at any time. The interest payments by Trustmark will be used to pay the quarterly distributions payable by the Trust to the holder of the trust preferred securities. However, so long as no event of default has occurred under the debentures, Trustmark may defer interest payments on the debentures (in which case the Trust will also defer distributions otherwise due on the trust preferred securities) for up to 20 consecutive quarters. The debentures are subordinated to the prior payment of any other indebtedness of Trustmark that, by its terms, is not similarly subordinated. The trust preferred securities are recorded as a long-term liability on Trustmark’s balance sheet; however, for regulatory purposes the trust preferred securities are treated as Tier 1 capital under the rules of the Federal Reserve Board (FRB), Trustmark’s primary federal regulatory agency. Trustmark also entered into a Guarantee Agreement, dated August 18, 2006, pursuant to which it has agreed to guarantee the payment by the Trust of distributions on the trust preferred securities and the payment of principal of the trust preferred securities when due, either at maturity or on redemption, but only if and to the extent that the Trust fails to pay distributions on or principal of the trust preferred securities after having received interest payments or principal payments on the junior subordinated debentures from Trustmark for the purpose of paying those distributions or the principal amount of the trust preferred securities. As defined in applicable accounting standards, the Trust, a wholly-owned subsidiary of Trustmark, is considered a variable interest entity for which Trustmark is not the primary beneficiary. Accordingly, the accounts of the Trust are not included in Trustmark’s consolidated financial statements. At both December 31, 2024 and 2023 , assets for the Trust totaled $ 61.9 million, resulting from the investment in junior subordinated debentures issued by Trustmark. Liabilities and shareholders’ equity for the Trust also totaled $ 61.9 million at both December 31, 2024 and 2023 , resulting from the issuance of trust preferred securities in the amount of $ 60.0 million as well as $ 1.9 million in common securities issued to Trustmark. During 2024 , net income for the Trust equaled $ 134 thousand resulting from interest income from the junior subordinated debt securities issued by Trustmark to the Trust, compared with net income of $ 132 thousand during 2023 and $ 66 thousand during 2022. Dividends issued to Trustmark by the Trust during 2024 totaled $ 134 thousand, compared to $ 132 thousand during 2023 and $ 66 thousand during 2022 .

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Note 13 – Revenue from Contracts with Customers The Insurance Segment is included in discontinued operations for all periods presented in the accompanying consolidated balance sheets and the consolidated statements of income. See Note 2 - Discontinued Operations for additional information about discontinued operations. The following table presents noninterest income (loss) disaggregated by reportable operating segment and revenue stream for the periods presented ($ in thousands): Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Service charges on $ 44,295 $ — $ 44,295 $ 43,329 $ — $ 43,329 $ 42,073 $ — $ 42,073 Bank card and other fees 31,010 2,138 33,148 30,387 2,995 33,382 31,474 4,584 36,058 Mortgage banking, net — 26,626 26,626 — 26,216 26,216 — 28,306 28,306 Wealth management 748 — 748 838 — 838 639 — 639 Other, net 16,906 337 17,243 11,769 ( 2,076 ) 9,693 8,469 805 9,274 Securities gains (losses), — ( 182,792 ) ( 182,792 ) — 39 39 — — — Total noninterest $ 92,959 $ ( 153,691 ) $ ( 60,732 ) $ 86,323 $ 27,174 $ 113,497 $ 82,655 $ 33,695 $ 116,350 Wealth Management Service charges on $ 87 $ — $ 87 $ 87 $ — $ 87 $ 84 $ — $ 84 Bank card and other fees 153 — 153 57 — 57 47 — 47 Wealth management 36,503 — 36,503 34,254 — 34,254 34,374 — 34,374 Other, net 193 377 570 162 376 538 528 39 567 Total noninterest $ 36,936 $ 377 $ 37,313 $ 34,560 $ 376 $ 34,936 $ 35,033 $ 39 $ 35,072 Consolidated Service charges on $ 44,382 $ — $ 44,382 $ 43,416 $ — $ 43,416 $ 42,157 $ — $ 42,157 Bank card and other fees 31,163 2,138 33,301 30,444 2,995 33,439 31,521 4,584 36,105 Mortgage banking, net — 26,626 26,626 — 26,216 26,216 — 28,306 28,306 Wealth management 37,251 — 37,251 35,092 — 35,092 35,013 — 35,013 Other, net 17,099 714 17,813 11,931 ( 1,700 ) 10,231 8,997 844 9,841 Securities gains (losses), — ( 182,792 ) ( 182,792 ) — 39 39 — — — Total noninterest $ 129,895 $ ( 153,314 ) $ ( 23,419 ) $ 120,883 $ 27,550 $ 148,433 $ 117,688 $ 33,734 $ 151,422 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card income within bank card and other fees; mortgage banking, net; amortization of tax credits, accretion of the FDIC indemnification asset, 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 securities gains (losses), net.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Note 14 – Income Taxes The income tax provision attributable to continuing operations included in the consolidated statements of income was as follows for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Current Federal $ ( 28,470 ) $ 26,100 $ 12,362 State ( 6,563 ) 6,392 2,560 Deferred Federal 19,104 ( 3,798 ) ( 13,388 ) State 4,776 ( 950 ) ( 3,347 ) Income tax provision $ ( 11,153 ) $ 27,744 $ ( 1,813 ) For the periods presented, the income tax provision attributable to continuing operations differs from the amount computed by applying the statutory federal income tax rate in effect for each respective period to income before income taxes as a result of the following ($ in thousands): Years Ended December 31, 2024 2023 2022 Income tax computed at statutory tax rate $ 7,152 $ 38,018 $ 12,412 Tax exempt interest ( 5,605 ) ( 5,521 ) ( 4,419 ) Nondeductible interest expense 2,153 2,104 271 State income taxes, net ( 5,185 ) 5,050 2,025 Income tax credits, net ( 11,483 ) ( 11,904 ) ( 10,071 ) Death benefit gains ( 92 ) ( 80 ) ( 287 ) Other 1,907 77 ( 1,744 ) Income tax provision $ ( 11,153 ) $ 27,744 $ ( 1,813 ) Temporary differences between the financial statement carrying amounts and the tax basis of assets and liabilities gave rise to the following net deferred tax assets at December 31, 2024 and 2023, which are included in other assets on the accompanying consolidated balance sheets ($ in thousands): December 31, 2024 2023 Deferred tax assets: Litigation losses $ — $ 26,647 Other real estate 2,293 1,743 Accumulated credit losses 47,416 43,473 Deferred compensation 19,299 17,893 Finance and operating lease liabilities 10,652 11,426 Realized built-in losses 7,679 8,429 Securities 22,294 68,223 Pension and other postretirement benefit plans 1,574 2,025 Interest on nonaccrual loans 1,173 1,218 LHFS 236 777 Stock-based compensation 3,544 3,196 Derivatives 4,018 2,993 Tax credit carryforward 3,489 — Other 8,745 10,543 Gross deferred tax asset 132,412 198,586 Deferred tax liabilities: Goodwill and other identifiable intangibles 13,880 14,297 Premises and equipment 14,218 17,382 Finance and operating lease right-of-use assets 9,492 10,420 MSR 29,206 26,271 Securities 3,789 3,181 Equipment financing 8,803 — Other 2,874 2,264 Gross deferred tax liability 82,262 73,815 Net deferred tax asset $ 50,150 $ 124,771 The following table provides a summary of the changes during the calendar years presented in the amount of unrecognized tax benefits that are included in other liabilities in the consolidated balance sheet ($ in thousands): December 31, 2024 2023 2022 Balance at beginning of period $ 2,864 $ 2,316 $ 2,129 Change due to tax positions taken during the current year 1,497 1,333 653 Change due to tax positions taken during a prior year ( 1,076 ) ( 426 ) ( 266 ) Change due to the lapse of applicable statute of limitations during the ( 407 ) ( 359 ) ( 200 ) Balance at end of period $ 2,878 $ 2,864 $ 2,316 Accrued interest, net of federal benefit $ 415 $ 470 $ 489 Unrecognized tax benefits that would impact the effective $ 2,579 $ 2,518 $ 1,948 Interest and penalties related to unrecognized tax benefits, if any, are recorded in income tax expense. With limited exception, Trustmark is no longer subject to U.S. federal, state and local audits by tax authorities for 2018 and earlier tax years. Trustmark does not anticipate a significant change to the total amount of unrecognized tax benefits within the next twelve months.

Defined Benefit and Other Postr

Defined Benefit and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Defined Benefit and Other Postretirement Benefits	Note 15 – 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 tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for the Continuing Plan for the periods presented ($ in thousands): December 31, 2024 2023 Change in benefit obligation: Benefit obligation, beginning of year $ 5,923 $ 6,907 Service cost 40 52 Interest cost 246 292 Actuarial (gain) loss ( 214 ) 164 Benefits paid ( 464 ) ( 1,492 ) Benefit obligation, end of year $ 5,531 $ 5,923 Change in plan assets: Fair value of plan assets, beginning of year $ 2,403 $ 2,907 Actual return on plan assets 233 237 Employer contributions 513 751 Benefit payments ( 464 ) ( 1,492 ) Fair value of plan assets, end of year $ 2,685 $ 2,403 Funded status at end of year - net liability $ ( 2,846 ) $ ( 3,520 ) Amounts recognized in accumulated other comprehensive loss: Net (gain) loss - amount recognized $ ( 601 ) $ ( 262 ) Actuarial (gain) loss included in benefit obligation: Change in discount rate $ ( 344 ) $ 124 Change in mortality table — ( 38 ) Other 130 78 Actuarial (gain) loss $ ( 214 ) $ 164 Years Ended December 31, 2024 2023 2022 Net periodic benefit cost: Service cost $ 40 $ 52 $ 115 Interest cost 246 292 192 Expected return on plan assets ( 96 ) ( 107 ) ( 121 ) Recognized net (gain) loss due to lump sum settlements ( 13 ) 25 — Recognized net actuarial loss — — 224 Net periodic benefit cost $ 177 $ 262 $ 410 Other changes in plan assets and benefit obligation recognized in other Net loss - Total recognized in other comprehensive income (loss) $ ( 339 ) $ 9 $ ( 1,699 ) Total recognized in net periodic benefit cost and other comprehensive $ ( 162 ) $ 271 $ ( 1,289 ) Weighted-average assumptions as of end of year: Discount rate for benefit obligation 5.30 % 4.67 % 4.88 % Discount rate for net periodic benefit cost 4.67 % 4.88 % 2.41 % Expected long-term return on plan assets 5.00 % 5.00 % 5.00 % Plan Assets The weighted-average asset allocations by asset category are presented below for the Continuing Plan at December 31, 2024 and 2023. December 31, 2024 2023 Money market fund 2.0 % 27.0 % Exchange traded funds: Equity securities 33.0 % 36.0 % Fixed income 59.0 % 28.0 % International 6.0 % 9.0 % Total 100.0 % 100.0 % The strategic objective of the investments of the assets in the Continuing Plan aims to provide both income and potential capital appreciation. The allocation is managed on a total return basis with the average participant age in mind. It is well suited for moderately conservative investors seeking an ample level of income while also participating in equity markets. This investment mix is designed to take advantage of rising stock markets while cushioning the effects of stock market downturns. The portfolio is typically balanced between equity and fixed income. The equity exposure has the potential to earn a return greater than inflation while the fixed income exposure may reduce the risk and volatility of the portfolio to which the equity mutual funds contribute. Fair Value Measurements 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. The following tables set forth by level, within the fair value hierarchy, the Continuing Plan’s assets measured at fair value at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Total Level 1 Level 2 Level 3 Money market fund $ 55 $ 55 $ — $ — Exchange traded funds: Equity securities 874 874 — — Fixed income 1,600 1,600 — — International 156 156 — — Total assets at fair value $ 2,685 $ 2,685 $ — $ — December 31, 2023 Total Level 1 Level 2 Level 3 Money market fund $ 643 $ 643 $ — $ — Exchange traded funds: Equity securities 861 861 — — Fixed income 690 690 — — International 209 209 — — Total assets at fair value $ 2,403 $ 2,403 $ — $ — There have been no changes in the methodologies used in estimating the fair value of plan assets at December 31, 2024. The money market fund approximates fair value due to its immediate maturity. The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although Trustmark believes their valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Contributions The range of potential contributions to the Continuing Plan is determined annually by the Continuing Plan’s actuary in accordance with applicable IRS rules and regulations. Trustmark’s policy is to fund amounts that are sufficient to satisfy the annual minimum funding requirements and do not exceed the maximum that is deductible for federal income tax purposes. The actual amount of the contribution is determined annually based on the Continuing Plan’s funded status and return on plan assets as of the measurement date, which is December 31. For the plan year ending December 31, 2024 , Trustmark’s minimum required contribution to the Continuing Plan was $ 127 thousand and Trustmark contributed $ 290 thousand. For the plan year ending December 31, 2025, Trustmark’s minimum required contribution to the Continuing Plan is expected to be $ 109 thousand. Management and the Board of Directors of Trustmark will monitor the Continuing Plan throughout 2025 to determine any additional funding requirements by the plan’s measurement date. Estimated Future Benefit Payments and Other Disclosures The following table presents the expected benefit payments, which reflect expected future service, for the Continuing Plan ($ in thousands): Year Amount 2025 $ 693 2026 762 2027 961 2028 535 2029 414 2030 - 2034 1,575 Amounts in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost during 2025 include a gain of $ 7 thousand. 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 tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands): December 31, 2024 2023 Change in benefit obligation: Benefit obligation, beginning of year $ 41,619 $ 43,201 Service cost 45 69 Interest cost 1,851 2,013 Actuarial (gain) loss ( 1,009 ) 763 Benefits paid ( 4,344 ) ( 4,427 ) Benefit obligation, end of year $ 38,162 $ 41,619 Change in plan assets: Fair value of plan assets, beginning of year $ — $ — Employer contributions 4,344 4,427 Benefit payments ( 4,344 ) ( 4,427 ) Fair value of plan assets, end of year $ — $ — Funded status at end of year - net liability $ ( 38,162 ) $ ( 41,619 ) Amounts recognized in accumulated other comprehensive loss: Net loss $ 6,880 $ 8,235 Prior service cost 15 126 Amounts recognized $ 6,895 $ 8,361 Actuarial (gain) loss included in benefit obligation: Change in discount rate $ ( 1,794 ) $ 649 Change in mortality table — ( 308 ) Other 785 422 Actuarial (gain) loss $ ( 1,009 ) $ 763 Years Ended December 31, 2024 2023 2022 Net periodic benefit cost: Service cost $ 45 $ 69 $ 71 Interest cost 1,851 2,013 1,278 Amortization of prior service cost 111 111 111 Recognized net actuarial loss 346 284 986 Net periodic benefit cost $ 2,353 $ 2,477 $ 2,446 Other changes in plan assets and benefit obligation recognized in other Net (gain) loss $ ( 1,355 ) $ 479 $ ( 10,181 ) Amortization of prior service cost ( 111 ) ( 111 ) ( 111 ) Total recognized in other comprehensive income (loss) $ ( 1,466 ) $ 368 $ ( 10,292 ) Total recognized in net periodic benefit cost and other comprehensive $ 887 $ 2,845 $ ( 7,846 ) Weighted-average assumptions as of end of year: Discount rate for benefit obligation 5.30 % 4.67 % 4.88 % Discount rate for net periodic benefit cost 4.67 % 4.88 % 2.41 % Estimated Supplemental Retirement Plan Payments and Other Disclosures The following table presents the expected benefits payments for Trustmark’s supplemental retirement plans ($ in thousands): Year Amount 2025 $ 3,885 2026 3,850 2027 3,673 2028 3,550 2029 3,545 2030 - 2034 15,563 Amounts in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost during 2025 include a loss of $ 261 thousand and prior service cost of $ 15 thousand. Other Benefit Plans Defined Contribution Plan Trustmark provides associates with a self-directed 401(k) retirement plan that allows associates to contribute a percentage of eligible compensation, within limits provided by the Internal Revenue Code and accompanying regulations, into the plan. Trustmark matches 100 % of associate contributions to the plan based on the amount of each participant’s contributions up to a maximum of 6 % of eligible compensation, subject to the IRS maximum eligible compensation. Associates are automatically enrolled in the plan at 3 % of eligible compensation unless they opt out within 60 days of employment. Associates may become eligible to make elective deferral contributions the first of the month following one month of employment. Eligible associates that elect to participate vest immediately in Trustmark’s matching contributions, as this is a Safe Harbor 401(k) Plan. Trustmark’s contributions to this plan were $ 10.7 million in 2024 , $ 10.8 million in 2023 and $ 10.2 million in 2022 .

Stock and Incentive Compensatio

Stock and Incentive Compensation Plans	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock and Incentive Compensation Plans	Note 16 – Stock and Incentive Compensation Plans 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. At December 31, 2024 , the maximum number of shares of Trustmark’s common stock available for issuance under the Stock Plan was 849,968 shares. 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 is 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 are granted at 100 % of target, yet provide for achievement units if performance measures exceed 100 %. The restricted stock agreement for these units provide for dividend privileges, but no voting rights. The following table summarizes Trustmark’s performance unit activity for the periods presented: Years Ended December 31, 2024 2023 2022 Weighted- Weighted- Weighted- Average Average Average Grant-Date Grant-Date Grant-Date Shares Fair Value Shares Fair Value Shares Fair Value Nonvested shares, beginning of year 174,214 $ 30.81 148,416 $ 31.63 140,821 $ 31.80 Granted 80,580 26.67 70,666 29.78 60,773 32.64 Adjustment for performance factor 9,348 30.02 — — — — Released from restriction ( 54,973 ) 30.02 ( 39,943 ) 31.98 ( 19,723 ) 33.40 Forfeited ( 1,124 ) 28.32 ( 4,925 ) 31.41 ( 33,455 ) 33.11 Nonvested shares, end of year 208,045 $ 29.39 174,214 $ 30.81 148,416 $ 31.63 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 provide for dividend privileges, but no voting rights . The following table summarizes Trustmark’s time-based unit activity for the periods presented: Years Ended December 31, 2024 2023 2022 Weighted- Weighted- Weighted- Average Average Average Grant-Date Grant-Date Grant-Date Shares Fair Value Shares Fair Value Shares Fair Value Nonvested shares, beginning of year 358,252 $ 30.04 312,978 $ 30.99 337,466 $ 31.18 Granted 167,646 27.27 145,003 28.59 133,307 31.85 Released from restriction ( 140,637 ) 28.63 ( 90,587 ) 30.90 ( 148,905 ) 32.16 Forfeited ( 12,985 ) 28.79 ( 9,142 ) 30.72 ( 8,890 ) 31.62 Nonvested shares, end of year 372,276 $ 29.37 358,252 $ 30.04 312,978 $ 30.99 The following table presents information regarding compensation expense for units under the Stock Plan for the periods presented ($ in thousands): At December 31, 2024 Recognized Compensation Expense Unrecognized Weighted Average for Years Ended December 31, Compensation Life of Unrecognized 2024 2023 2022 Expense Compensation Expense Performance awards $ 2,827 $ 1,772 $ 1,258 $ 2,110 1.67 Time-based awards 4,388 4,383 3,625 2,815 1.63 Total $ 7,215 $ 6,155 $ 4,883 $ 4,925

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 17 – Commitments and 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 December 31, 2024 and 2023 , Trustmark had unused commitments to extend credit of $ 4.575 billion and $ 4.907 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 December 31, 2024 and 2023 , Trustmark’s maximum exposure to credit loss in the event of nonperformance by the other party for letters of credit was $ 110.4 million and $ 125.4 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. At December 31, 2024 and 2023 , the fair value of collateral held was $ 27.2 million and $ 31.4 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 sheets. Changes in the ACL on off-balance sheet credit exposures were as follows for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Balance at beginning of period $ 34,057 $ 36,838 $ 35,623 PCL, off-balance sheet credit exposures ( 4,665 ) ( 2,781 ) 1,215 Balance at end of period $ 29,392 $ 34,057 $ 36,838 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 year ended December 31, 2024 primarily reflected a decrease in required reserves as a result of changes in the total reserve rate coupled with a decrease in unfunded commitments which was partially offset by an increase in required reserves as a result of implementing the Performance Trend and the External Factor-Credit Quality Review qualitative reserve factors. The decrease in the ACL on off-balance sheet credit exposures for the year ended December 31, 2023 was primarily due to decreases in unfunded commitments for the construction, land development and other land portfolio and other construction loan portfolio. Legal Proceedings Trustmark 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,” Trustmark 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, Trustmark 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.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2024
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Note 18 – 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 this 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 2.5 %. 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. At December 31, 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 December 31, 2024. To be categorized in this manner, Trustmark and TNB maintained 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 December 31, 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 December 31, 2024 and 2023 ($ in thousands): Actual Regulatory Capital Minimum To Be Well Amount Ratio Requirement Capitalized At December 31, 2024: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,729,672 11.54 % 7.000 % n/a Trustmark National Bank 1,828,044 12.20 % 7.000 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,789,672 11.94 % 8.500 % n/a Trustmark National Bank 1,828,044 12.20 % 8.500 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 2,094,874 13.97 % 10.500 % n/a Trustmark National Bank 2,009,544 13.41 % 10.500 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,789,672 9.99 % 4.00 % n/a Trustmark National Bank 1,828,044 10.21 % 4.00 % 5.00 % At December 31, 2023: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,521,665 10.04 % 7.000 % n/a Trustmark National Bank 1,602,327 10.58 % 7.000 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,581,665 10.44 % 8.500 % n/a Trustmark National Bank 1,602,327 10.58 % 8.500 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,862,246 12.29 % 10.500 % n/a Trustmark National Bank 1,759,426 11.61 % 10.500 % 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 % Dividends on Common Stock Dividends paid by Trustmark are substantially funded from dividends received from TNB. Approval by TNB’s regulators is required if the total of all dividends declared in any calendar year exceeds the total of its net income for that year combined with its retained net income of the preceding two years . In 2025, TNB will have available approximately $ 255.3 million plus its net income for that year to pay as dividends. Stock Repurchase Program On December 7, 2021, Trustmark’s Board of Directors authorized a stock repurchase program effective January 1, 2022, under which $ 100.0 million of Trustmark’s outstanding shares could be acquired through December 31, 2022. Under this authority, Trustmark repurchased approximately 789 thousand shares of its common stock valued at $ 24.6 million during the twelve months ended December 31, 2022. 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 could be acquired through December 31, 2024. Under this authority, Trustmark repurchased approximately 203 thousand shares of its common stock valued at $ 7.5 million during the twelve months ended December 31, 2024. On December 3, 2024 , Trustmark’s Board of Directors authorized a stock repurchase program effective January 1, 2025, under which $ 100.0 million of Trustmark’s outstanding shares may be acquired through December 31, 2025. The repurchase program, which is subject to market conditions and management discretion, will be implemented through open market repurchases or privately negotiated transactions. Under this authority, Trustmark repurchased approximately 243 thousand shares of its common stock valued at $ 8.5 million during January 2025. Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) The following tables present the net change in the components of accumulated other comprehensive income (loss) and the related tax effects allocated to each component for the years ended December 31, 2024, 2023 and 2022 ($ 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 15 – 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. 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. Before Tax Tax (Expense) Net of Tax Amount Benefit Amount Year Ended December 31, 2024 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ ( 13,666 ) $ 3,417 $ ( 10,249 ) Reclassification adjustment for net (gains) losses realized in net income 182,792 ( 45,698 ) 137,094 Change in net unrealized holding loss on securities transferred to held to maturity 14,587 ( 3,647 ) 10,940 Total securities available for sale and transferred securities 183,713 ( 45,928 ) 137,785 Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement 1,460 ( 365 ) 1,095 Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Recognized net loss due to lump sum settlements ( 13 ) 3 ( 10 ) Change in net actuarial loss 248 ( 62 ) 186 Total pension and other postretirement benefit plans 1,806 ( 452 ) 1,354 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 22,232 ) 5,558 ( 16,674 ) Reclassification adjustment for (gain) loss realized in net income 18,132 ( 4,533 ) 13,599 Total cash flow hedge derivatives ( 4,100 ) 1,025 ( 3,075 ) Total other comprehensive income (loss) $ 181,419 $ ( 45,355 ) $ 136,064 Year Ended December 31, 2023 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ 50,537 $ ( 12,404 ) $ 38,133 Reclassification adjustment for net (gains) losses realized in net income ( 39 ) 10 ( 29 ) Change in net unrealized holding loss on securities transferred to held to maturity 15,557 ( 3,889 ) 11,668 Total securities available for sale and transferred securities 66,055 ( 16,283 ) 49,772 Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement ( 691 ) 173 ( 518 ) Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Recognized net loss due to lump sum settlements 25 ( 6 ) 19 Change in net actuarial loss 177 ( 44 ) 133 Total pension and other postretirement benefit plans ( 378 ) 95 ( 283 ) Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 8,131 ) 2,033 ( 6,098 ) Reclassification adjustment for (gain) loss realized in net income 16,385 ( 4,096 ) 12,289 Total cash flow hedge derivatives 8,254 ( 2,063 ) 6,191 Total other comprehensive income (loss) $ 73,931 $ ( 18,251 ) $ 55,680 Year Ended December 31, 2022 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ ( 229,524 ) $ 57,381 $ ( 172,143 ) Change in net unrealized holding loss on securities transferred to held to maturity ( 86,033 ) 21,508 ( 64,525 ) Total securities available for sale and transferred securities ( 315,557 ) 78,889 ( 236,668 ) Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement 10,792 ( 2,698 ) 8,094 Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Change in net actuarial loss 1,089 ( 272 ) 817 Total pension and other postretirement benefit plans 11,992 ( 2,998 ) 8,994 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 20,685 ) 5,171 ( 15,514 ) Reclassification adjustment for (gain) loss realized in net income 460 ( 115 ) 345 Total cash flow hedge derivatives ( 20,225 ) 5,056 ( 15,169 ) Total other comprehensive income (loss) $ ( 323,790 ) $ 80,947 $ ( 242,843 ) 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 Transferred Defined Cash Flow Hedge Derivative Total Balance, January 1, 2022 $ ( 17,774 ) $ ( 14,786 ) $ — $ ( 32,560 ) Other comprehensive income (loss) before ( 236,668 ) 8,094 ( 15,514 ) ( 244,088 ) Amounts reclassified from accumulated other — 900 345 1,245 Net other comprehensive income (loss) ( 236,668 ) 8,994 ( 15,169 ) ( 242,843 ) Balance, December 31, 2022 ( 254,442 ) ( 5,792 ) ( 15,169 ) ( 275,403 ) Other comprehensive income (loss) before 49,801 ( 518 ) ( 6,098 ) 43,185 Amounts reclassified from accumulated other ( 29 ) 235 12,289 12,495 Net other comprehensive income (loss) 49,772 ( 283 ) 6,191 55,680 Balance, December 31, 2023 ( 204,670 ) ( 6,075 ) ( 8,978 ) ( 219,723 ) Other comprehensive income (loss) before reclassification 691 1,095 ( 16,674 ) ( 14,888 ) Amounts reclassified from accumulated other 137,094 259 13,599 150,952 Net other comprehensive income (loss) 137,785 1,354 ( 3,075 ) 136,064 Balance, December 31, 2024 $ ( 66,885 ) $ ( 4,721 ) $ ( 12,053 ) $ ( 83,659 )

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value	Note 19 – 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 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 December 31, 2024 and 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 years ended December 31, 2024 and 2023. December 31, 2024 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 202,669 $ 202,669 $ — $ — U.S. Government agency obligations 38,807 — 38,807 — Mortgage-backed securities 1,451,058 — 1,451,058 — Securities available for sale 1,692,534 202,669 1,489,865 — LHFS 200,307 — 200,307 — MSR 139,317 — — 139,317 Other assets - derivatives 15,397 18 15,150 229 Other liabilities - derivatives 41,355 2,183 39,172 — 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 — Obligations of states and political subdivisions — — — — 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 years ended December 31, 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) ( 5,844 ) 2,229 Additions 13,291 — Sales — ( 2,845 ) Balance, December 31, 2024 $ 139,317 $ 229 The amount of total gains (losses) for the period included in earnings that are $ 5,801 $ 1,681 Balance, January 1, 2023 $ 129,677 $ 157 Total net (loss) gain included in Mortgage banking, net (1) ( 11,519 ) 2,470 Additions 13,712 — Sales — ( 1,782 ) Balance, December 31, 2023 $ 131,870 $ 845 The amount of total gains (losses) for the period included in earnings that are $ ( 1,489 ) $ 1,103 (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 December 31, 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 December 31, 2024 , Trustmark had outstanding balances of $ 37.1 million with a related ACL of $ 13.7 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 $ 5.5 million were re-measured during 2024 , requiring write-downs of $ 2.2 million to reach their current fair values compared to $ 898 thousand of foreclosed assets that were re-measured during 2023 , requiring write-downs of $ 243 thousand. Fair Value of Financial Instruments FASB ASC Topic 825 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 December 31, 2024 and 2023 were as follows ($ in thousands): December 31, 2024 December 31, 2023 Carrying Estimated Carrying Estimated Financial Assets: Level 2 Inputs: Cash and short-term investments $ 567,251 $ 567,251 $ 975,343 $ 975,343 Securities held to maturity 1,335,385 1,259,107 1,426,279 1,355,504 Level 3 Inputs: Net LHFI 12,929,672 12,886,168 12,811,157 12,762,505 Financial Liabilities: Level 2 Inputs: Deposits 15,108,175 15,098,854 15,569,763 15,553,417 Federal funds purchased and securities sold under 324,008 324,008 405,745 405,745 Other borrowings 301,541 301,541 483,230 483,226 Subordinated notes 123,702 120,625 123,482 108,125 Junior subordinated debt securities 61,856 49,794 61,856 46,856 Fair Value Option Trustmark has elected to account for its LHFS under the fair value option, with interest income on these LHFS reported in interest and fees on LHFS and LHFI. The fair value of the LHFS is determined using quoted prices for a similar asset, adjusted for specific attributes of that loan. The 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 in mortgage banking, net. The changes in the fair value of the LHFS are largely offset by changes in the fair value of the derivative instruments. For the year ended December 31, 2024 , a net loss of $ 2.1 million was recorded as noninterest income in mortgage banking, net for changes in the fair value of the LHFS accounted for under the fair value option compared to net gain of $ 2.2 million and a net loss of $ 3.3 million, respectively, for the years ended December 31, 2023 and 2022. Interest and fees on LHFS and LHFI for the year ended December 31, 2024 included $ 8.6 million of interest earned on the LHFS accounted for under the fair value option compared to $ 7.8 million and $ 6.8 million for the years ended December 31, 2023 and 2022 , 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 the 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 $ 97.6 million and $ 78.8 million at December 31, 2024 and 2023, respectively, and are included in LHFS on the accompanying consolidated balance sheets. The following table provides information about the fair value and the contractual principal outstanding of the LHFS accounted for under the fair value option at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Fair value of LHFS $ 102,676 $ 105,974 LHFS contractual principal outstanding 105,322 102,994 Fair value less unpaid principal $ ( 2,646 ) $ 2,980

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 20 – 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 December 31, 2024 , the aggregate notional value of Trustmark's interest rate swaps and floor spreads designated as cash flow hedges totaled $ 1.500 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 $ 474 thousand and $ 57 thousand of amortization expense for the years ended December 31, 2024 and 2023 , respectively. As interest payments are received on Trustmark's variable-rate assets, 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 during the same period. During the next twelve months, Trustmark estimates that $ 8.1 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 $ 311.5 million at December 31, 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 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 $ 9.2 million, $ 6.3 million and $ 4.1 million for the years ended December 31, 2024, 2023 and 2022, 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 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 $ 110.0 million at December 31, 2024 , with a positive valuation adjustment of $ 679 thousand, compared to $ 109.5 million at December 31, 2023 , with a negative valuation adjustment of $ 994 thousand. 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 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 $ 52.1 million at December 31, 2024 , with a positive valuation adjustment of $ 229 thousand, compared to $ 61.9 million at December 31, 2023 , with a positive valuation adjustment of $ 845 thousand. 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 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 December 31, 2024 , Trustmark had interest rate swaps with an aggregate notional amount of $ 1.819 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 December 31, 2024 , the termination value of interest rate swaps in a liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $ 568 thousand compared to $ 1.4 million at December 31, 2023. At December 31, 2024 and 2023 , Trustmark had posted collateral of $ 1.5 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 December 31, 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 December 31, 2024 , Trustmark had entered into eleven risk participation agreements as a beneficiary with an aggregate notional amount of $ 83.9 million compared to six risk participation agreements as a beneficiary with an aggregate notional amount of $ 40.1 million at December 31, 2023. At December 31, 2024 , Trustmark had entered into twenty-eight risk participation agreements as a guarantor with aggregate notional amounts of $ 229.1 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 December 31, 2024 and 2023. Tabular Disclosures The following tables disclose the fair value of derivative instruments in Trustmark’s consolidated balance sheets at December 31, 2024 and 2023 as well as the effect of these derivative instruments on Trustmark’s results of operations for the periods presented ($ in thousands): December 31, 2024 2023 Derivatives in hedging relationships Interest rate contracts: Interest rate swaps included in other assets (1) $ 74 $ 1,182 Interest rate floors included in other assets 1,582 1,689 Interest rate swaps included in other liabilities (1) 5,958 267 Derivatives not designated as hedging instruments Interest rate contracts: Exchange traded purchased options included in other assets $ 18 $ 180 OTC written options (rate locks) included in other assets 229 845 Futures contracts included in other assets — 7,505 Interest rate swaps included in other assets (1) 13,478 11,910 Credit risk participation agreements included in other assets 16 5 Futures contracts included in other liabilities 1,972 — Forward contracts included in other liabilities ( 679 ) 994 Exchange traded written options included in other liabilities 211 21 Interest rate swaps included in other liabilities (1) 33,817 34,255 Credit risk participation agreements included in other liabilities 76 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. Years Ended December 31, 2024 2023 2022 Derivatives in hedging relationships Amount of gain (loss) reclassified from accumulated other $ ( 18,132 ) $ ( 16,385 ) $ ( 460 ) Derivatives not designated as hedging instruments Amount of gain (loss) recognized in mortgage banking, net $ ( 13,965 ) $ ( 5,281 ) $ ( 43,764 ) Amount of gain (loss) recognized in bank card and other fees 135 271 403 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): Years Ended December 31, 2024 2023 2022 Derivatives in cash flow hedging relationship Amount of gain (loss) recognized in other comprehensive $ ( 16,674 ) $ ( 6,098 ) $ ( 15,514 ) Information about financial instruments that are eligible for offset in the consolidated balance sheets at December 31, 2024 and 2023 is presented in the following tables ($ in thousands): Offsetting of Derivative Assets As of December 31, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 15,134 $ — $ 15,134 $ ( 7,956 ) $ ( 2,000 ) $ 5,178 Offsetting of Derivative Liabilities As of December 31, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 39,775 $ — $ 39,775 $ ( 7,956 ) $ ( 1,460 ) $ 30,359 Offsetting of Derivative Assets As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of the Statement 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	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Segment Information	Note 21 – Segment Information Trustmark’s management reporting structure includes two segments: General Banking and Wealth Management. The General Banking Segment is responsible for all traditional banking products and services, including loans and deposits. The General Banking Segment also consists of internal operations such as Human Resources, Executive Administration, Treasury (Funds Management), Public Affairs and Corporate Finance. The Wealth Management Segment provides customized solutions for customers by integrating financial services with traditional banking products and services such as money management, full-service brokerage, financial planning, personal and institutional trust and retirement services. Trustmark's reportable segments are determined by the Chief Executive Officer (CEO), who is the designated chief operating decision maker (CODM), based upon information provided about Trustmark's products and services offered. The reportable segments are also distinguished by the level of information provided to the CEO, who uses such information to review performance of various lines of business, which are then aggregated if operating performance, products and services and customers are similar. The CEO evaluates the financial performance of Trustmark's lines of business, such as evaluating revenue streams, significant expenses and budget to actual results, in assessing the performance of Trustmark's reportable segments and in the determination of allocating resources. The Insurance Segment is included in discontinued operations for all periods presented in the accompanying consolidated balance sheets and the consolidated statements of income. 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 tables disclose financial information by reportable segment for the periods presented ($ in thousands): Year Ended December 31, 2024 General Banking Wealth Management Consolidated Interest income $ 949,600 $ 10,730 $ 960,330 Interest expense 373,369 2,540 375,909 Funds transfer pricing, net 2,231 ( 2,231 ) — Net interest income 578,462 5,959 584,421 PCL 41,101 154 41,255 Net interest income after PCL 537,361 5,805 543,166 Service charges on deposit accounts 44,295 87 44,382 Bank card and other fees 33,148 153 33,301 Mortgage banking, net 26,626 — 26,626 Wealth management 748 36,503 37,251 Other, net 17,620 193 17,813 Securities gains (losses), net ( 182,792 ) — ( 182,792 ) Internal allocations ( 377 ) 377 — Noninterest income (loss) ( 60,732 ) 37,313 ( 23,419 ) Salaries and employee benefits 243,930 22,309 266,239 Services and fees 98,833 2,757 101,590 Other segment expenses (1) 116,080 1,781 117,861 Internal allocations ( 5,897 ) 5,897 — Noninterest expense 452,946 32,744 485,690 Income from continuing operations before income taxes 23,683 10,374 34,057 Income taxes from continuing operations ( 13,726 ) 2,573 ( 11,153 ) Consolidated income from continuing operations $ 37,409 $ 7,801 $ 45,210 Selected Financial Information Total assets from continuing operations $ 17,938,268 $ 214,154 $ 18,152,422 Depreciation and amortization from continuing operations $ 37,599 $ 250 $ 37,849 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense. Year Ended December 31, 2023 General Banking Wealth Management Consolidated Interest income $ 869,143 $ 9,689 $ 878,832 Interest expense 324,470 1,484 325,954 Funds transfer pricing, net 2,326 ( 2,326 ) — Net interest income 546,999 5,879 552,878 PCL 26,716 ( 2,135 ) 24,581 Net interest income after PCL 520,283 8,014 528,297 Service charges on deposit accounts 43,329 87 43,416 Bank card and other fees 33,382 57 33,439 Mortgage banking, net 26,216 — 26,216 Wealth management 838 34,254 35,092 Other, net 10,069 162 10,231 Securities gains (losses), net 39 — 39 Internal allocations ( 376 ) 376 — Noninterest income (loss) 113,497 34,936 148,433 Salaries and employee benefits 247,014 21,256 268,270 Services and fees 104,432 3,373 107,805 Other segment expenses (1) 117,757 1,864 119,621 Internal allocations ( 5,846 ) 5,846 — Noninterest expense 463,357 32,339 495,696 Income from continuing operations before income taxes 170,423 10,611 181,034 Income taxes from continuing operations 25,091 2,653 27,744 Consolidated income from continuing operations $ 145,332 $ 7,958 $ 153,290 Selected Financial Information Total assets from continuing operations $ 18,469,213 $ 185,342 $ 18,654,555 Depreciation and amortization from continuing operations $ 34,924 $ 261 $ 35,185 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense. Year Ended December 31, 2022 General Banking Wealth Management Consolidated Interest income $ 534,531 $ 7,302 $ 541,833 Interest expense 47,044 81 47,125 Funds transfer pricing, net 1,900 ( 1,900 ) — Net interest income 489,387 5,321 494,708 PCL 22,913 ( 21 ) 22,892 Net interest income after PCL 466,474 5,342 471,816 Service charges on deposit accounts 42,073 84 42,157 Bank card and other fees 36,058 47 36,105 Mortgage banking, net 28,306 — 28,306 Wealth management 639 34,374 35,013 Other, net 9,313 528 9,841 Securities gains (losses), net — — — Internal allocations ( 39 ) 39 — Noninterest income (loss) 116,350 35,072 151,422 Salaries and employee benefits 232,720 21,527 254,247 Services and fees 100,397 3,496 103,893 Other segment expenses (1) 204,097 1,896 205,993 Internal allocations ( 5,954 ) 5,954 — Noninterest expense 531,260 32,873 564,133 Income from continuing operations before income taxes 51,564 7,541 59,105 Income taxes from continuing operations ( 3,683 ) 1,870 ( 1,813 ) Consolidated income from continuing operations $ 55,247 $ 5,671 $ 60,918 Selected Financial Information Total assets from continuing operations $ 17,724,953 $ 214,313 $ 17,939,266 Depreciation and amortization from continuing operations $ 38,909 $ 288 $ 39,197 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.

Parent Company Only Financial I

Parent Company Only Financial Information	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Information	Note 22 – Parent Company Only Financial Information ($ in thousands) Condensed Balance Sheets December 31, 2024 2023 Assets: Investment in banks $ 2,062,555 $ 1,770,392 Other assets 86,907 77,901 Total Assets $ 2,149,462 $ 1,848,293 Liabilities and Shareholders' Equity: Accrued expense $ 1,577 $ 1,108 Subordinated notes 123,702 123,482 Junior subordinated debt securities 61,856 61,856 Shareholders' equity 1,962,327 1,661,847 Total Liabilities and Shareholders' Equity $ 2,149,462 $ 1,848,293 Condensed Statements of Income Years Ended December 31, 2024 2023 2022 Revenue: Dividends received from banks $ 82,536 $ 67,189 $ 89,733 Earnings of subsidiaries over distributions 148,884 106,388 ( 11,269 ) Other income 165 163 94 Total Revenue 231,585 173,740 78,558 Expense: Other expense 8,576 8,251 6,671 Total Expense 8,576 8,251 6,671 Net Income $ 223,009 $ 165,489 $ 71,887 Condensed Statements of Cash Flows Years Ended December 31, 2024 2023 2022 Operating Activities: Net income $ 223,009 $ 165,489 $ 71,887 Adjustments to reconcile net income to net cash provided Net change in investment in subsidiaries ( 148,884 ) ( 106,388 ) 11,269 Other ( 835 ) ( 797 ) ( 1,550 ) Net cash from operating activities 73,290 58,304 81,606 Financing Activities: Common stock dividends ( 56,790 ) ( 56,653 ) ( 56,679 ) Repurchase and retirement of common stock ( 7,499 ) — ( 24,604 ) Net cash from financing activities ( 64,289 ) ( 56,653 ) ( 81,283 ) Net change in cash and cash equivalents 9,001 1,651 323 Cash and cash equivalents at beginning of year 77,511 75,860 75,537 Cash and cash equivalents at end of year $ 86,512 $ 77,511 $ 75,860 Trustmark paid income taxes of approximately $ 21.5 million in 2024 , $ 38.8 million in 2023 and $ 2.7 million in 2022 . Trustmark (parent company only) paid interest of $ 4.5 million in 2024, 2023 and 2022 .

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Business	Business 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.
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation 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 consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). 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 2025 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.
Securities	Securities Securities are classified as either held to maturity or available for sale. Securities are classified as held to maturity and carried at amortized cost when Management has the positive intent and the ability to hold them until maturity. Securities to be held for indefinite periods of time are classified as available for sale and carried at fair value, with the unrealized holding gains and losses reported as a component of other comprehensive income (loss), net of tax. Securities available for sale are used as part of Trustmark’s interest rate risk management strategy and may be sold in response to changes in interest rates, changes in prepayment rates and other factors. Management determines the appropriate classification of securities at the time of purchase. The amortized cost of debt securities classified as securities held to maturity or securities available for sale is adjusted for amortization of premiums and accretion of discounts to maturity of the security using the interest method. Such amortization or accretion is included in interest on securities. Realized gains and losses are determined using the specific identification method and are included in noninterest income as securities gains (losses), net. Securities transferred from the available for sale category to the held to maturity category are recorded at fair value at the date of transfer. Unrealized holding gains or losses associated with the transfer of securities from available for sale to held to maturity are included in the balance of accumulated other comprehensive income (loss), net of tax, in the consolidated balance sheets. These unrealized holding gains or losses are amortized over the remaining life of the security as a yield adjustment in a manner consistent with the amortization or accretion of the original purchase premium or discount on the associated security. Allowance for Credit Losses (ACL) Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 326 requires a current expected credit losses methodology for estimating allowances for credit losses and applies to all financial instruments carried at amortized cost, including securities held to maturity, and makes targeted improvements to the accounting for credit losses on securities available for sale. Under FASB ASC Topic 326, the ACL is an estimate measured using relevant information about past events, including historical credit loss experience on financial assets with similar risk characteristics, current conditions, and reasonable and supportable forecasts that affect the collectability of the remaining cash flows over the contractual term of the financial assets. Trustmark adopted a zero-credit loss assumption for certain classes of securities. This zero-credit loss assumption applies to debt issuances of the U.S. Treasury and agencies and instrumentalities of the United States government. The reasons behind the adoption of the zero-credit loss assumption were as follows: • High credit rating • Long history with no credit losses • Guaranteed by a sovereign entity • Widely recognized as “risk-free rate” • Ability and authority to print its own currency • Currency is routinely held by central banks, used in international commerce, and commonly viewed as reserve currency • Currently under the U.S. Government conservatorship or receivership Trustmark continuously monitors any changes in economic conditions, credit downgrades, changes to explicit or implicit guarantees granted to certain debt issuers, and any other relevant information that would indicate potential credit deterioration and prompt Trustmark to reconsider its zero-credit loss assumption. Securities Available for Sale FASB ASC Subtopic 326-30, “Financial Instruments-Credit Losses-Available-for-Sale Debt Securities,” replaced the concept of other-than-temporarily impaired with the ACL. Unlike securities held to maturity, securities available for sale are evaluated on an individual level and pooling of securities is not allowed. 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 as outlined below: • Review the extent to which the fair value is less than the amortized cost and observe the security’s lowest credit rating as reported by third-party credit ratings companies. • The securities that violate the credit loss triggers above would be subjected to additional analysis that may include, but is not limited to: changes in market interest rates, changes in securities credit ratings, security type, service area economic factors, financial performance of the issuer/or obligor of the underlying issue and third-party guarantee. • If Trustmark determines that a credit loss exists, the credit portion of the allowance will be 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 Trustmark records will be 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). Accrued interest receivable is excluded from the estimate of credit losses for securities available for sale and reported in other assets on the consolidated balance sheets. Securities Held to Maturity FASB ASC Subtopic 326-20, “Financial Instruments-Credit Losses-Measured at Amortized Cost,” requires institutions to measure expected credit losses on financial assets carried at amortized cost on a collective or pool basis when similar risks exist. Trustmark uses several levels of segmentation to measure expected credit losses for its held to maturity securities: • The portfolio is segmented into agency and non-agency securities. • The non-agency securities are separated into municipal, mortgage, and corporate securities. • Each individual segment is categorized by third-party credit ratings. As discussed above, Trustmark has determined that for certain classes of securities it would be appropriate to assume the expected credit loss to be zero , which include debt issuances of the U.S. Treasury and agencies and instrumentalities of the United States government. This assumption is reviewed and attested to quarterly. Trustmark uses an internally built model to verify the accuracy of third-party provided calculations. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity and included in other assets on the consolidated balance sheets. Trustmark monitors the credit quality of securities held to maturity on a monthly basis through credit ratings.
LHFS	LHFS Trustmark's LHFS portfolio consists of mortgage loans purchased from wholesale customers or originated in Trustmark’s General Banking Segment. Trustmark has elected to account for its LHFS under the fair value option permitted by FASB ASC Topic 825, “Financial Instruments,” with interest income on the LHFS reported in interest and fees on LHFS and LHFI. Trustmark reports unrealized gains and losses resulting from changes in the fair value of the LHFS accounted for under the fair value option as noninterest income in mortgage banking, net. 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 the fair value reported as noninterest income in mortgage banking, net. Changes in the fair value of the LHFS are largely offset by changes in the fair value of the derivative instruments. Election of the fair value option allows Trustmark to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for its LHFS at the lower of cost or fair value and the derivative instruments at fair value. Realized gains and losses upon ultimate sale of the loans are reported as noninterest income in mortgage banking, net. Government National Mortgage Association (GNMA) optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under FASB ASC Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When Trustmark is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as LHFS, regardless of whether Trustmark intends to exercise the buy-back option. These loans are reported as LHFS with the offsetting liability being reported as short-term borrowings. The fair value option election does not apply to the GNMA optional repurchase loans which do not meet the requirements under FASB ASC Topic 825 to be accounted for under the fair value option. Trustmark defers the upfront loan fees and costs related to the LHFS. In general, the LHFS are only retained on Trustmark’s balance sheet for 30 to 45 days before they are pooled and sold in the secondary market. The difference between deferring these loan fees and costs until the loans are sold and recognizing them in earnings as incurred as required by FASB ASC Subtopic 825-10 is considered immaterial. Deferred loan fees and costs are reflected in the basis of the LHFS and, as such, impact the resulting gain or loss when the loans are sold.
LHFI	LHFI LHFI are loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off and are reported at amortized cost net of the ACL. Amortized cost is the amount of unpaid principal, adjusted for the net amount of direct costs and nonrefundable loan fees associated with lending. The net amount of nonrefundable loan origination fees and direct costs associated with the lending process, including commitment fees, is deferred and accreted to interest income over the lives of the loans using a method that approximates the interest method. Interest on LHFI is accrued and recorded as interest income based on the outstanding principal balance. Past due LHFI are loans contractually past due 30 days or more as to principal or interest payments. A LHFI is classified as nonaccrual, and the accrual of interest on such loan is discontinued, when the contractual payment of principal or interest becomes 90 days past due on commercial credits and 120 days past due on non-business purpose credits. In addition, a credit may be placed on nonaccrual at any other time Management has serious doubts about further collectability of principal or interest according to the contractual terms, even though the loan is currently performing. A LHFI may remain in accrual status if it is in the process of collection and well-secured. When a LHFI is placed in nonaccrual status, interest accrued but not received is reversed against interest income. Interest payments received on nonaccrual LHFI are applied against principal under the cost-recovery method, until qualifying for return to accrual status. Under the cost-recovery method, interest income is not recognized until the principal balance is reduced to zero. LHFI are restored to accrual status when the ultimate collectability of the total contractual principal and interest is no longer in doubt and the obligation has either been brought current or has performed in accordance with the contractual terms for a reasonable period of time. Purchased Credit Deteriorated (PCD) Loans Purchased loans which have experienced more than insignificant credit deterioration since origination are considered PCD loans. An initial ACL for PCD loans is determined at acquisition using the same ACL methodology as the LHFI. The initial ACL determined on a collective basis is allocated to individual loans. PCD loans are reported at the amortized cost, which equals the loan purchased price plus the initial ACL. The difference between the amortized cost basis of the PCD loan and the par value of the loan is the noncredit premium or discount, which is amortized into interest income over the life of the loan. Subsequent changes to the ACL are recorded through the PCL, LHFI. Upon adoption of FASB ASC Topic 326, Trustmark elected to maintain pools of loans that were previously accounted for under FASB ASC Subtopic 310-30, “Receivables-Loans and Debt Securities Acquired with Deteriorated Credit Quality,” and will continue to account for these pools as a unit of account. Loans are only removed from the existing loan pools if they are written off, paid off or sold. Upon adoption of FASB ASC Topic 326, the ACL was determined for each pool and added to the pool’s carrying value to establish a new amortized cost basis. The difference between the unpaid principal balance of the pool and the new amortized cost basis is the noncredit premium or discount which will be amortized into interest income over the remaining life of the pool. Changes to the ACL after adoption of FASB ASC Topic 326 are recorded through the PCL, LHFI. ACL LHFI Trustmark’s ACL methodology for LHFI is based upon guidance within FASB ASC Subtopic 326-20 as well as applicable regulatory guidance. The ACL on LHFI 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 on LHFI. The ACL on LHFI is an estimate of expected losses inherent within Trustmark’s existing LHFI portfolio. The ACL on LHFI is adjusted through the PCL, LHFI and reduced by the charge off of loan amounts, net of recoveries. The loan loss estimation process involves procedures to appropriately consider the unique characteristics of Trustmark’s LHFI portfolio segments. These segments are further disaggregated into loan classes, the level at which credit risk is estimated. When computing allowance levels, credit loss assumptions are estimated using a model that categorizes loan pools based on loss history, delinquency status and other credit trends and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. Evaluations of the portfolio and individual credits are inherently subjective, as they require estimates, assumptions and judgments as to the facts and circumstances of particular situations. Determining the appropriateness of the allowance is complex and requires judgment by Management about the effect of matters that are inherently uncertain. In future periods, evaluations of the overall LHFI portfolio, in light of the factors and forecasts then prevailing, may result in significant changes in the allowance and credit loss expense. Trustmark estimates the ACL on LHFI using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Trustmark uses a third-party software application to calculate the quantitative portion of the ACL on LHFI using a methodology and assumptions specific to each loan pool. The qualitative portion of the allowance is based on general economic conditions and other internal and external factors affecting Trustmark as a whole as well as specific LHFI. Factors considered include the following: lending policies and procedures, economic conditions and concentrations of credit, nature and volume of the portfolio, performance trends, and external factors. The quantitative and qualitative portions of the allowance are added together to determine the total ACL on LHFI, which reflects Management’s expectations of future conditions based on reasonable and supportable forecasts. The methodology for estimating the amount of expected credit losses reported in the ACL on LHFI 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. 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 ACL for individual loans that do not share risk characteristics with other loans is measured as the difference between the discounted value of expected future cash flows, based on the effective interest rate at origination, and the amortized cost basis of the loan, or the net realizable value. The ACL is the difference between the loan’s net realizable value and its amortized cost basis (net of previous charge-offs and deferred loan fees and costs), except for collateral-dependent loans. 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 the ‘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. If the calculated expected credit loss is determined to be permanent or not recoverable, the amount of the expected credit loss is charged off. Accrued interest receivable is not included in the amortized cost basis of Trustmark’s LHFI and, therefore, excluded from the estimate of credit losses for LHFI. LHFI are charged off against the ACL on LHFI, with any subsequent recoveries credited back to the ACL on LHFI account. Recoveries may not exceed the aggregate of amounts previously charged off. Trustmark’s Loan Policy Manual dictates the guidelines to be followed in determining when a loan is charged off. Commercial purpose LHFI are charged off when a determination is made that the loan is uncollectible and continuance as a bankable asset is not warranted. Consumer LHFI secured by 1-4 family residential real estate are generally charged off or written down to the fair value of the collateral less cost to sell at no later than 180 days of delinquency. Non-real estate consumer purpose LHFI, including both secured and unsecured loans, are generally charged off by 120 days of delinquency. Consumer revolving lines of credit and credit card debt are generally charged off on or prior to 180 days of delinquency. ACL on Off-Balance Sheet Credit Exposures Under FASB ASC Subtopic 326-20, Trustmark is required to estimate expected credit losses for off-balance sheet credit exposures which are not unconditionally cancellable. Trustmark maintains a separate ACL on off-balance sheet credit exposures, including unfunded loan commitments and letters of credit. Expected credit losses for off-balance sheet credit exposures are estimated by calculating a commitment usage factor over the contractual period for exposures that are not unconditionally cancellable by Trustmark. Trustmark calculates a loan pool level unfunded amount for the period. Trustmark views the loan pools as either closed-ended or open-ended. Closed-ended loan pools are those that typically fund up to 100% such as other construction and nonowner-occupied. Open-ended loan pools are those that behave similar to a revolver such as the commercial and industrial and home equity line of credit loan pools. In addition to the unfunded balances, Trustmark uses a funding rate for loan pools that are considered open-ended. Trustmark calculates the funding rate of the open-ended loan pools each period. In order to mitigate volatility and incorporate historical experience in the funding rate, Trustmark uses a twelve-quarter moving average. For the closed-ended loan pools, Trustmark takes a conservative approach and uses a 100% funding rate. The expected funding rate is applied to each pool’s unfunded commitment balances to ensure that reserves will be applied to each pool based on balances expected to be funded based upon historical levels. In addition to the funding rate being applied to the unfunded commitment balance, a reserve rate is applied, which includes both quantitative and a majority of the qualitative aspects of the current period's expected credit loss rate. During 2024, Management implemented a performance trends qualitative factor for unfunded commitments and an External Factor - Credit Quality Review qualitative factor for unfunded commitments. For both qualitative factors, the same assumptions are applied in the unfunded commitment calculation that are used in the funded balance calculation with the only difference being the unfunded commitment calculation includes the funding rates for the unfunded commitments. The reserves for these two qualitative factors are added to the other calculated reserve to get a total reserve for off-balance sheet credit exposures. Adjustments to the ACL on off-balance sheet credit exposures are recorded to the PCL, off-balance sheet credit exposures. 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.
Premises and Equipment, Net	Premises and Equipment, Net Premises and equipment are reported at cost, less accumulated depreciation and amortization. Depreciation is charged to expense over the estimated useful lives of the assets, which are up to thirty-nine years for buildings and three to ten years for furniture and equipment. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter. In cases where Trustmark has the right to renew the lease for additional periods, the lease term for the purpose of calculating amortization of the capitalized cost of the leasehold improvements is extended when Trustmark is “reasonably assured” that it will renew the lease. Depreciation and amortization expenses are computed using the straight-line method. Trustmark continually evaluates whether events and circumstances have occurred that indicate that such long-lived assets have become impaired. Measurement of any impairment of such long-lived assets is based on the fair values of those assets. Branch closures and purchased land held for future branch expansion for more than five years are evaluated to determine if the related land, buildings and building improvements should be transferred to assets held for sale in accordance with FASB ASC Topic 360, “Property, Plant and Equipment.” The property is transferred to assets held for sale at the lower of its carrying value or fair value less cost to sell. An impairment loss is recorded at the time of transfer if the carrying value of the assets exceeds the fair value. Impairment losses are recorded as noninterest expense in other expense.
MSR	MSR Trustmark recognizes as assets the rights to service mortgage loans based on the estimated fair value of the MSR when loans are sold and the associated servicing rights are retained. Trustmark has elected to account for the MSR at fair value. The fair value of the MSR is determined using a valuation model administered by a third party that calculates the present value of estimated future net servicing income. Estimates of fair value involve several assumptions, including the key valuation assumptions about market expectations of future prepayment rates, interest rates and discount rates which are provided by a third-party firm. Prepayment rates are projected using an industry standard prepayment model. The model considers other key factors, such as a wide range of standard industry assumptions tied to specific portfolio characteristics such as remittance cycles, escrow payment requirements, geographic factors, foreclosure loss exposure, VA no-bid exposure, delinquency rates and cost of servicing, including base cost and cost to service delinquent mortgages. Prevailing market conditions at the time of analysis are factored into the accumulation of assumptions and determination of servicing value. Trustmark economically hedges changes in the fair value of the MSR attributable to interest rates. See the section titled “Derivative Financial Instruments – Derivatives Not Designated as Hedging Instruments” of this note for information regarding these derivative instruments. Trustmark receives annual servicing fee income for loans serviced, which is recorded as noninterest income in mortgage banking, net. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Late fees and ancillary fees related to loan servicing are not considered material.
Goodwill and Identifiable Intangible Assets	Goodwill and Identifiable Intangible Assets Trustmark accounts for goodwill and other intangible assets in accordance with FASB ASC Topic 350, “Intangibles – Goodwill and Other.” Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for Trustmark, or more often if events or circumstances indicate that there may be impairment. Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with a related contract, asset or liability. Trustmark’s identifiable intangible assets primarily relate to core deposits and borrower relationships. These intangibles, which have definite useful lives, are amortized on an accelerated basis over their estimated useful lives. In addition, these intangibles are evaluated for impairment whenever events and changes in circumstances indicate that the carrying amount should be reevaluated. Trustmark also purchased banking charters in order to facilitate its entry into the states of Florida and Texas. These identifiable intangible assets were amortized on a straight-line method over 20 years.
Other Real Estate	Other Real Estate 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. When foreclosed real estate is received in full satisfaction of a loan, the amount, if any, by which the recorded amount of the loan exceeds the estimated fair value of the property is a loss charged against the ACL at the time of foreclosure. If the recorded amount of the loan is less than the estimated fair value of the property, a credit is recorded to write-downs of other real estate at the time of foreclosure. Other real estate is revalued on an annual basis or more often if market conditions necessitate. An other real estate specific reserve may be recorded through other real estate expense for declines in fair value subsequent to foreclosure based on recent appraisals or changes in market conditions. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged against an existing other real estate specific reserve or as noninterest expense in other real estate expense if a reserve does not exist. Costs of operating and maintaining the properties as well as gains or losses on their disposition are also included in other real estate expense as incurred. Improvements made to properties are capitalized if the expenditures are expected to be recovered upon the sale of the properties.
Lessor Arrangements	Lessor Arrangements Trustmark leases certain types of machinery and equipment to its commercial customers through sales-type and direct financing leases as part of its equipment financing portfolio. Sales-type and direct financing leases are similar to other forms of installment lending in that lessors generally do not retain benefits and risks incidental to ownership of the property subject to the leases. Such arrangements are essentially financing transactions that permit lessees to acquire and use property. Trustmark does not have any significant operating leases in which it is the lessor. As lessor, the sum of all minimum lease payments over the lease term and the estimated residual value, less unearned interest income, is recorded as the net investment in the lease on the commencement date and is included in LHFI on the consolidated balance sheets. Interest income is accrued as earned over the term of the lease based on the net investment in the leases and is recognized in interest and fees on LHFS and LHFI on the consolidated statements of income. Certain fees or costs associated with lease originations are deferred and accreted or amortized to interest income over the life of the lease using the effective interest method. Trustmark’s portfolio of sales-type and direct financing leases generally have remaining lease terms of three to ten 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 at either the residual value or a specified price. Trustmark expects to sell or release the equipment at the end of the lease term. Due to the structure of these leases, there is no selling profit or loss on these transactions.
Lessee Arrangements	Lessee Arrangements Trustmark has certain contracts that it has identified as leases according to FASB ASC Topic 842, "Leases". Trustmark classifies these leases as either operating or finance leases and recognizes a right-of-use asset and a lease liability at the lease commencement date. The lease liability represents the present value of the lease payments that remain unpaid as of the commencement date and the right-of-use asset is the initial lease liability recognized for the lease plus any lease payments made to the lessor at or before the commencement date as well as any initial direct costs less any lease incentives received. Trustmark accounts for the lease and nonlease components separately as such amounts are readily determinable. Trustmark’s finance leases consist of building and equipment leases. Trustmark recognizes interest expense based on the discount rate of the lease as interest expense in other interest expense and recognizes depreciation expense on a straight-line basis over the lease term as noninterest expense in net occupancy – premises for building leases and in equipment expense for equipment leases. Trustmark amortizes the right-of-use asset over the life of the lease term on a straight-line basis. Trustmark’s lease liabilities are measured as the present value of the remaining lease payments throughout the lease term. Trustmark records its finance lease right-of-use assets in premises and equipment, net and its finance lease liabilities in other borrowings. Trustmark’s operating leases primarily consist of building and land leases. Trustmark recognizes lease rent expense on a straight-line basis over the term of the lease contract and records it as noninterest expense in net occupancy – premises for building and land leases and in equipment expense for equipment leases. Trustmark’s amortization of the right-of-use asset is the difference between the straight-line lease expense and the interest expense recognized on the lease liability during the period. Trustmark’s lease liabilities are measured as the present value of the remaining lease payments throughout the lease term. Trustmark’s leases typically have one or more renewal options included in the lease contract. Due to the nature of Trustmark’s leases, for leases with renewal options available, Trustmark considers the first renewal option as reasonably certain to renew and is therefore included in the measurement of the right-of-use assets and lease liabilities. In order to calculate its right-of-use assets and lease liabilities, FASB ASC Topic 842 requires Trustmark to use the rate of interest implicit in the lease when readily determinable. If the rate implicit in the lease is not readily determinable, Trustmark is required to use its incremental borrowing rate, which is the rate of interest Trustmark would have to pay to borrow on a collateralized basis over a similar term in a similar economic environment. Trustmark was able to determine the implicit interest rate for its equipment leases and used that rate as its discount rate. Since the implicit interest rate for most of its building and land leases were not readily determinable, Trustmark used its incremental borrowing rate. Trustmark made an accounting policy election to not recognize short-term leases (12 months or less) on the balance sheet. Trustmark’s short-term leases primarily include automated teller machines. For short-term leases, Trustmark recognizes lease expense on a straight-line basis over the lease term.
Federal Home Loan Bank (FHLB) and Federal Reserve Bank of Atlanta Stock	Federal Home Loan Bank (FHLB) and Federal Reserve Bank of Atlanta Stock Trustmark accounts for its investments in FHLB and Federal Reserve Bank of Atlanta stock in accordance with FASB ASC Subtopic 942-325, “Financial Services-Depository and Lending-Investments-Other.” FHLB and Federal Reserve Bank stock are equity securities that do not have a readily determinable fair value because its ownership is restricted and it lacks a market. FHLB and Federal Reserve Bank stock are carried at cost and evaluated for impairment. Trustmark’s investment in member bank stock is included in other assets in the accompanying consolidated balance sheets. At December 31, 2024 and 2023 , Trustmark’s investment in member bank stock totaled $ 44.9 million and $ 54.4 million, respectively. The carrying value of Trustmark’s member bank stock gave rise to no other-than-temporary impairment for the years ended December 31, 2024, 2023 and 2022 .
Revenue from Contract with Customers	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, excluding all of mortgage banking, net and securities gains (losses), net and portions of bank card and other fees and other, net, 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 expense, are also within the scope of FASB ASC Topic 606. General Banking Segment Service Charges on Deposit Accounts In general, deposit accounts represent contracts with customers with no fixed duration and can be terminated or modified by either party at any time without compensation to the other party. According to FASB ASC Topic 606, a contract that can be terminated by either party without compensation does not exist for periods beyond the then-current period. Therefore, deposit contracts are considered to renew day-to-day if not minute-to-minute. Deposit contracts have a single continuous or stand-ready service obligation whereby Trustmark makes customer funds available for use by the customer as and when the customer chooses as well as other services such as statement rendering and online banking. The specific services provided vary based on the type of deposit account. These services are not individually distinct, but are distinct as a group, and therefore, constitute a single performance obligation which is satisfied over time and qualifies as a series of distinct service periods. Trustmark receives a fixed service charge amount as consideration monthly for services rendered. The service charge amount varies based on the type of deposit account. Some of the service charge revenue is subject to refund provisions, which is variable consideration under the guidelines of FASB ASC Topic 606. Trustmark has elected the ‘as-invoiced’ practical expedient permitted under FASB ASC Topic 606 for recognition of service charge revenue. Therefore, revenue is recognized at the time and in the amount the customer is charged. The service charge revenue is presented net of refunded amounts on Trustmark’s consolidated statements of income. Services related to non-sufficient funds, overdrafts, excess account activity, stop payments, dormant accounts, etc. are considered optional purchases for a deposit contract because there is no performance obligation for Trustmark until the service is requested by the customer or the occurrence of a triggering event. Fees for these services are fixed amounts and are charged to the customer when the service is performed. Revenue is recognized at the time the customer is charged. Bank Card and Other Fees Revenue from contracts with customers in bank card and other fees includes income related to interchange fees and various other contracts which primarily consists of contracts with a single performance obligation that is satisfied at a point in time. Trustmark receives a fixed consideration amount once the performance obligation is completed for these contracts. Trustmark reports revenue from these contracts net of amounts refunded or due to a third party. As both a debit and credit card issuer, Trustmark receives an interchange fee for every card transaction completed by its customers with a merchant. Trustmark receives two types of interchange fees: point-of-sale transactions in which the customer must enter the PIN associated with the card to complete the transaction (a debit card transaction), and signature transactions in which the signature of the customer is required to complete the transaction (a credit card transaction). Trustmark, as the card issuing or settlement bank, has a contract (implied based on customary business practices) with the payment network in which Trustmark has a single continuous service obligation to make funds available for settlement of the card transaction. Trustmark’s service obligation is satisfied over time and qualifies as a series of distinct service periods. Trustmark receives interchange fees as consideration for services rendered in the amount established by the respective payment network. The interchange fees are established by the payment network based on the type of transaction and is posted on their website. Trustmark receives and records interchange fee revenue from the payment networks daily net of all fees and amounts due to the payment network. Other Income Revenue from contracts with customers in other income includes income related to cash management services and other contracts with a single performance obligation that is satisfied at a point in time. Trustmark receives a fixed consideration amount once the performance obligation is completed for these contracts. Trustmark reports revenue from these contracts net of amounts refunded or due to a third party. Trustmark provides cash management services through the delivery of various products and services offered to its business and municipal customers including various departments of state, city and local governments, universities and other non-profit entities. Similar to the deposit account contracts, the cash management contracts primarily represent contracts with customers with no fixed duration and can be terminated or modified by either party at any time without compensation to the other party. Therefore, cash management contracts are generally considered to renew day-to-day if not minute-to-minute. Cash management contracts have a single continuous or stand-ready service obligation whereby Trustmark makes a specific service or group of services available for use by the customer as and when the customer chooses. The specific services provided vary based on the type of account or product. These services are not individually distinct, but are distinct as a group, and therefore, constitute a single performance obligation which is satisfied over time and qualifies as a series of distinct service periods. Trustmark receives a set service charge or maintenance fee amount as consideration monthly for services rendered. However, some of the fees are based on the number of transactions that occur ( i.e., flat fee for a set number of transactions per month then an additional charge for each transaction after that) or the average daily account balance maintained by the customer during the month and a small amount of the cash management fee revenue is subject to refund provisions. These fees represent variable consideration under the guidelines of FASB ASC Topic 606. Trustmark has elected the ‘as-invoiced’ practical expedient permitted under FASB ASC Topic 606 for recognition of cash management fee revenue. The cash management revenue is presented net of any refunded amounts on Trustmark’s consolidated statements of income. Trustmark’s merchant services provider contracts directly with Trustmark business customers and provides Trustmark’s merchant customers card processing equipment and transaction processing services. Trustmark’s contract with the merchant services provider has a single-continuous service obligation to provide customer referrals for potential new accounts which is satisfied over time and qualifies as a series of distinct service periods. Trustmark receives a flat fee for each new account established and a percentage of the residual income related to transactions processed for Trustmark’s merchant customers each month as provided in the contract. Under the guidelines of FASB ASC Topic 606, the fee received for each new account and the profit sharing represent variable consideration. Revenue from merchant card services contracts is recognized monthly using a time-elapsed measure of progress. Trustmark has elected the ‘as-invoiced’ practical expedient permitted under FASB ASC Topic 606 for recognition of the merchant card services revenue. Other Real Estate 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 expense. Other real estate sales for the year ended December 31, 2024 resulted in a net loss of $ 1.1 million compared to a net loss of $ 145 thousand for the year ended December 31, 2023 and a net loss of $ 1.0 million for the year ended December 31, 2022. In general, purchases of Trustmark’s other real estate property are not financed by Trustmark. Financing the purchase of other real estate is evaluated based upon the same lending policies and procedures as all other types of loans. Under FASB ASC Subtopic 610-20, “Other Income – Gains and Losses from the Derecognition of Nonfinancial Assets,” when Trustmark finances the sale of its other real estate to a buyer, Trustmark is required to assess whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these two criteria are met, Trustmark derecognizes the other real estate asset and records a gain or loss on the sale once control of the property is transferred to the buyer. Wealth Management Segment Trust Management There are four categories of revenue included in trust management: personal trust and investments, retirement plan services, institutional custody and other. Each of these categories includes multiple types of contracts, service obligations and fee income. However, the majority of these contracts include a single service obligation that is satisfied over time, the customer is charged in arrears for services rendered and revenue is recognized when payment is received. In general, the time period between when the service obligation is completed and when payment from the customer is received is less than 30 days. Revenue from trust management contracts is primarily related to monthly service periods and based on the prior month-end’s market value. Some trust management revenue is mandated by a court order, while other revenue consists of flat fees. Trust management revenue based on an account’s market value represents variable consideration under the guidelines of FASB ASC Topic 606. Trustmark has elected the ‘as-invoiced’ practical expedient allowed under FASB ASC Topic 606 to account for the trust management revenue. Assets under administration held by Trustmark in a fiduciary or agency capacity for customers are not included in Trustmark’s consolidated balance sheets. Investment Services Investment services includes both brokerage and annuity income. Trustmark has a contract with a third-party investment services company which contains a single continuous service obligation, to provide broker-dealer and advisory services to customers on behalf of the third-party, which is satisfied over time and qualifies as a series of distinct service periods. Trustmark serves as the agent between the third-party investment services company, the principle, and the customer. In accordance with the contract, Trustmark receives a monthly payment from the investment services company for commissions and advisory fees (asset management fees) earned on transactions completed in the prior month net of all charges and fees due to the investment services company. Trustmark recognizes revenue from the investment services company, net of the revenue sharing expense due to the investment services company, when the payments are received. Commissions vary from month-to-month based on the specific products and transactions completed. The advisory fees vary based on the average daily balance of the managed assets for the period. The commissions and advisory fees represent variable consideration under FASB ASC Topic 606. Trustmark has elected the ‘as-invoiced’ practical expedient allowed under FASB ASC Topic 606 to recognize revenue from the investment services company.
Derivative Financial Instruments	Derivative Financial Instruments Trustmark maintains an overall interest rate risk management strategy that incorporates the use of derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. Trustmark’s interest rate risk management strategy involves modifying the repricing characteristics of certain assets and liabilities so that changes in interest rates do not adversely affect the net interest margin and cash flows. Under the guidelines of FASB ASC Topic 815, “Derivatives and Hedging,” all derivative instruments are required to be recognized as either assets or liabilities and carried at fair value on the balance sheet. The fair value of derivative positions outstanding is included in other assets and/or other liabilities in the accompanying consolidated balance sheets and in the net change in these financial statement line items in the accompanying consolidated statements of cash flows as well as included in noninterest income in the accompanying consolidated statements of income and other comprehensive income (loss), net of tax in the accompanying consolidated statements of comprehensive income. Trustmark’s interest rate 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. Derivatives Designated as Hedging Instruments FASB ASC Topic 815, Derivatives and Hedging (ASC 815), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, qualitative disclosures are required that explain the objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of and gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. When entering into a hedge transaction, Trustmark formally documents the relationship between the hedging instrument and the hedged item, as well as the risk management objective and strategy for undertaking the hedge transaction, which includes designating the derivative instrument as a fair value or cash flow hedge to a specific asset or liability on the balance sheet or to specific forecasted transactions and the risk being hedged, along with a formal assessment at the inception of the hedge as to the effectiveness of the derivative instrument in offsetting changes in fair values or cash flows of the hedged item. Trustmark continues to assess hedge effectiveness on an ongoing basis using either a qualitative or a quantitative assessment (regression analysis). As required by ASC 815, Trustmark records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether Trustmark has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. For cash flow hedges, changes in the fair value of the derivative instrument are recorded in accumulated other comprehensive income (loss) and subsequently reclassified to net income in the same period that the hedged transaction impacts net income. Upon discontinuation of hedge accounting for cash flow hedges, any amounts in accumulated other comprehensive income (loss) related to that relationship affects earnings at the same time and in the same manner in which the hedged transaction affects earnings. If it becomes probable that the forecasted transaction will not occur, any related amounts in accumulated other comprehensive income (loss) are reclassified to earnings immediately. Derivatives Not Designated as Hedging Instruments 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 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 in mortgage banking, net and are offset by changes in the fair value of LHFS. See Note 1 – Significant Accounting Policies, “LHFS” for information regarding the fair value option election. Trustmark also utilizes derivative instruments such as interest rate lock commitments in its mortgage banking area. 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 in mortgage banking, net and are offset by the changes in the fair value of forward sales contracts. 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. These exchange-traded derivative instruments are accounted for at fair value with changes in the fair value recorded as noninterest income in mortgage banking, net and are offset by changes in the fair value of the MSR. The MSR fair value represents the present value of future cash flows, which among other things includes decay and the effect of changes in interest rates. Ineffectiveness of hedging the MSR fair value is measured by comparing the change in the fair value of the hedge instruments to the change in the fair value of the MSR asset attributable to changes in interest rates and other market driven changes in valuation inputs and assumptions. 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. Derivative 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 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.
Income Taxes	Income Taxes Trustmark accounts for uncertain tax positions in accordance with FASB ASC Topic 740, “Income Taxes,” which clarifies the accounting and disclosure for uncertainty in tax positions. Under the guidance of FASB ASC Topic 740, Trustmark accounts for deferred income taxes using the liability method. Deferred tax assets and liabilities are based on temporary differences between the financial statement carrying amounts and the tax basis of Trustmark’s assets and liabilities. Deferred tax assets and liabilities are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be realized or settled and are presented net in the accompanying consolidated balance sheets in other assets.
Stock-Based Compensation	Stock-Based Compensation Trustmark accounts for the stock and incentive compensation under the provisions of FASB ASC Topic 718, “Compensation – Stock Compensation.” Under this accounting guidance, fair value is established as the measurement objective in accounting for stock awards and requires the application of a fair value based measurement method in accounting for compensation cost, which is recognized over the requisite service period. Trustmark has elected to account for forfeitures of stock awards as they occur.
Statements of Cash Flows	Statements of Cash Flows For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks. The following table reflects specific transaction amounts for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Income taxes paid $ 21,472 $ 38,803 $ 2,701 Interest paid on deposits and borrowings 385,779 306,568 45,275 Noncash transfers from loans to other real estate 6,782 7,237 1,533 Securities transferred from available for sale to held to maturity — — 674,092 Investment in tax credit partnership not funded 4,839 3,202 18,891 Operating right-of-use assets resulting from lease liabilities 1,831 7,303 6,912
Per Share Data	Per Share Data Trustmark accounts for per share data in accordance with FASB ASC Topic 260, “Earnings Per Share,” which provides that unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of EPS pursuant to the two-class method. Trustmark has determined that its outstanding unvested stock awards are not participating securities. Based on this determination, no change has been made to Trustmark’s current computation for basic and diluted EPS. Basic EPS is computed by dividing net income by the weighted-average shares of common stock outstanding. Diluted EPS is computed by dividing net income by the weighted-average shares of common stock outstanding, adjusted for the effect of potentially dilutive stock awards outstanding during the period. The following table reflects weighted-average shares used to calculate basic and diluted EPS for the periods presented (in thousands): Years Ended December 31, 2024 2023 2022 Basic shares 61,158 61,054 61,242 Dilutive shares 226 177 190 Diluted shares 61,384 61,231 61,432 Weighted-average antidilutive stock awards were excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands): Years Ended December 31, 2024 2023 2022 Weighted-average antidilutive stock awards 2 23 —
Fair Value Measurements	Fair Value Measurements FASB ASC Topic 820, “Fair Value Measurements and Disclosures,” defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and requires certain disclosures about fair value measurements. The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. Depending on the nature of the asset or liability, Trustmark uses various valuation techniques and assumptions when estimating fair value. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. FASB ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs – Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that Trustmark has the ability to access at the measurement date. Level 2 Inputs – Valuation is based upon quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability such as interest rates, yield curves, volatilities and default rates and inputs that are derived principally from or corroborated by observable market data. Level 3 Inputs – Unobservable inputs reflecting the reporting entity’s own determination about the assumptions that market participants would use in pricing the asset or liability based on the best information available. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the fair value measurement in its entirety is classified is based on the lowest level input that is significant to the fair value measurement in its entirety. Trustmark’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer.
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 adopted the amendments of ASU 2023-07 related to annual disclosure requirements effective January 1, 2024, and the newly required annual disclosures are included in Note 21 – Segment Information of this report. Trustmark adopted 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 did not have a material impact to Trustmark’s consolidated financial statements or results of operations. 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 adopted 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 not expected to have a material impact to Trustmark’s consolidated financial statements or results of operations. Pending Accounting Pronouncements ASU 2024-03, “Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” Issued in November 2024, ASU 2024-03 with the objective of providing investors with more decision-useful information regarding a public business entity's expenses by enhancing disclosures on income statement expenses. Investor feedback indicated a strong preference for the disclosure of disaggregated financial reporting information as a top priority for the FASB. Detailed knowledge of an entity's expenses is crucial for understanding its prospects for future cash flows and for making performance comparisons over time and with other entities. Investors emphasized that information regarding cost of sales, selling, general, and administrative expenses, employee compensation costs, depreciation and amortization, and research and development expenditure would enhance their comprehension of an entity's cost structure and ability to forecast future cash flows. The ASU applies exclusively to public business entities and mandates additional disclosures about specific expense categories on both annual and interim bases in the notes to financial statements that are not currently required. The amendments do not alter or eliminate existing expense disclosure requirements nor change requirements for presenting expenses on the face of the income statement. However, they do specify that certain existing disclosures must now appear in the same tabular format as the new disaggregation requirements. The FASB issued ASU 2025-01 in January 2025, clarifying that the amendments in ASU 2024-03 are effective for public business entities for annual reporting periods beginning after December 15, 2026, and for interim reporting periods within annual reporting periods beginning after December 15, 2027. Early adoption is permitted. Trustmark intends to adopt the amendments of ASU 2024-03 effective January 1, 2027, and will include the required annual disclosures in its Annual Report on Form 10-K for the year ending December 31, 2027, and required interim disclosures in its Quarterly Report on Form 10-Q for the period ending March 31, 2028. Trustmark is currently evaluating the changes to disclosures required by ASU 2024-03; however, adoption of ASU 2024-03 is not expected to have a material impact to Trustmark’s consolidated financial statements or results of operations.
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 DCF analysis using the effective interest rate as of the security’s purchase date. The amount of credit loss Trustmark records will be 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. At both December 31, 2024 and 2023 , the results of the loss analysis performed 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 December 31, 2024 and 2023 , accrued interest receivable totaled $ 5.0 million and $ 3.7 million, respectively, for securities available for sale and was reported in other assets on the accompanying consolidated balance sheet.
Securities Held to Maturity	Securities Held to Maturity At December 31, 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 probability of default and loss given default assumptions, the total amount of current expected credit losses was zero at December 31, 2024 and immaterial at December 31, 2023. Therefore, no reserve was recorded at either December 31, 2024 or December 31, 2023. Accrued interest receivable is excluded from the estimate of credit losses for securities held to maturity. At December 31, 2024 and 2023 , accrued interest receivable totaled $ 2.4 million and $ 2.6 million for securities held to maturity and was reported in other assets on the accompanying consolidated balance sheet. At both December 31, 2024 and 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 December 31, 2024 and 2023 .

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Cash Flows Supplementary Disclosures	For purposes of reporting cash flows, cash and cash equivalents include cash on hand and amounts due from banks. The following table reflects specific transaction amounts for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Income taxes paid $ 21,472 $ 38,803 $ 2,701 Interest paid on deposits and borrowings 385,779 306,568 45,275 Noncash transfers from loans to other real estate 6,782 7,237 1,533 Securities transferred from available for sale to held to maturity — — 674,092 Investment in tax credit partnership not funded 4,839 3,202 18,891 Operating right-of-use assets resulting from lease liabilities 1,831 7,303 6,912
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): Years Ended December 31, 2024 2023 2022 Basic shares 61,158 61,054 61,242 Dilutive shares 226 177 190 Diluted shares 61,384 61,231 61,432
Weighted-Average Antidilutive Stock Awards Excluded from Determining Diluted EPS	Weighted-average antidilutive stock awards were excluded in determining diluted EPS. The following table reflects weighted-average antidilutive stock awards for the periods presented (in thousands): Years Ended December 31, 2024 2023 2022 Weighted-average antidilutive stock awards 2 23 —

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 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): Years Ended December 31, 2024 2023 2022 Noninterest income: Insurance commissions $ 27,728 $ 57,569 $ 53,721 Gain on sale of discontinued operations, net 228,272 — — Other, net 527 956 1 Total noninterest income 256,527 58,525 53,722 Noninterest expense: Salaries and employee benefits 16,263 36,395 33,193 Services and fees 704 1,673 1,576 Net occupancy - premises 269 975 1,278 Equipment expense 93 298 303 Other expense 2,046 2,882 2,730 Total noninterest expense 19,375 42,223 39,080 Income from discontinued operations before income taxes 237,152 16,302 14,642 Income taxes from discontinued operations 59,353 4,103 3,673 Income from discontinued operations $ 177,799 $ 12,199 $ 10,969 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)	12 Months Ended
	Dec. 31, 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 December 31, 2024 and 2023 ($ in thousands): Securities Available for Sale Securities Held to Maturity Gross Gross Estimated Gross Gross Estimated Amortized Unrealized Unrealized Fair Amortized Unrealized Unrealized Fair December 31, 2024 Cost Gains Losses Value Cost Gains Losses Value U.S. Treasury securities $ 203,524 $ 548 $ ( 1,403 ) $ 202,669 $ 29,842 $ 1 $ ( 522 ) $ 29,321 U.S. Government agency obligations 41,194 — ( 2,387 ) 38,807 — — — — Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA 31,365 3 ( 2,957 ) 28,411 16,218 — ( 844 ) 15,374 Issued by FNMA and FHLMC 1,091,122 1,610 ( 22,194 ) 1,070,538 423,372 94 ( 23,853 ) 399,613 Other residential mortgage-backed securities Issued or guaranteed by FNMA, — — — — 123,685 — ( 8,004 ) 115,681 Commercial mortgage-backed securities Issued or guaranteed by FNMA, 352,332 827 ( 1,050 ) 352,109 742,268 3 ( 43,153 ) 699,118 Total $ 1,719,537 $ 2,988 $ ( 29,991 ) $ 1,692,534 $ 1,335,385 $ 98 $ ( 76,376 ) $ 1,259,107 December 31, 2023 U.S. Treasury securities $ 396,179 $ — $ ( 23,811 ) $ 372,368 $ 29,068 $ — $ ( 26 ) $ 29,042 U.S. Government agency obligations 6,207 1 ( 416 ) 5,792 — — — — Obligations of states and political subdivisions — — — — 340 — — 340 Mortgage-backed securities Residential mortgage pass-through securities Guaranteed by GNMA 25,744 4 ( 2,613 ) 23,135 13,005 — ( 497 ) 12,508 Issued by FNMA and FHLMC 1,338,256 32 ( 161,490 ) 1,176,798 469,593 — ( 18,205 ) 451,388 Other residential mortgage-backed securities Issued or guaranteed by FNMA, 92,076 — ( 6,002 ) 86,074 154,466 — ( 10,113 ) 144,353 Commercial mortgage-backed securities Issued or guaranteed by FNMA, 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 December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Aaa $ 1,335,385 $ 1,425,939 Not Rated (1) — 340 Total $ 1,335,385 $ 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 ACL has not been recorded and segregated by length of impairment at December 31, 2024 and 2023 ($ in thousands): Less than 12 Months 12 Months or More Total Gross Gross Gross Estimated Unrealized Estimated Unrealized Estimated Unrealized December 31, 2024 Fair Value Losses Fair Value Losses Fair Value Losses U.S. Treasury securities $ 123,277 $ ( 1,925 ) $ — $ — $ 123,277 $ ( 1,925 ) U.S. Government agency obligations 38,807 ( 2,387 ) — — 38,807 ( 2,387 ) Mortgage-backed securities Residential mortgage pass-through Guaranteed by GNMA 15,802 ( 293 ) 27,803 ( 3,508 ) 43,605 ( 3,801 ) Issued by FNMA and FHLMC 981,747 ( 13,848 ) 237,487 ( 32,199 ) 1,219,234 ( 46,047 ) Other residential mortgage-backed Issued or guaranteed by FNMA, — — 115,681 ( 8,004 ) 115,681 ( 8,004 ) Commercial mortgage-backed Issued or guaranteed by FNMA, 164,971 ( 536 ) 767,566 ( 43,667 ) 932,537 ( 44,203 ) Total $ 1,324,604 $ ( 18,989 ) $ 1,148,537 $ ( 87,378 ) $ 2,473,141 $ ( 106,367 ) 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 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 gains or losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands): Years Ended December 31, Available for Sale 2024 2023 2022 Proceeds from calls and sales of securities $ 1,378,272 $ 4,796 $ — Gross realized gains — 47 — Gross realized losses ( 182,792 ) ( 8 ) —
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 December 31, 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 Available for Sale Held to Maturity Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value Due in one year or less $ 45,777 $ 45,976 $ — $ — Due after one year through five years 62,388 62,737 29,842 29,321 Due after five years through ten years 136,553 132,763 — — 244,718 241,476 29,842 29,321 Mortgage-backed securities 1,474,819 1,451,058 1,305,543 1,229,786 Total $ 1,719,537 $ 1,692,534 $ 1,335,385 $ 1,259,107

LHFI and ACL, LHFI (Tables)

LHFI and ACL, LHFI (Tables)	12 Months Ended
	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loan Portfolio Held for Investment	At December 31, 2024 and 2023, LHFI consisted of the following ($ in thousands): December 31, 2024 2023 Loans secured by real estate: Construction, land development and other land $ 587,244 $ 642,886 Other secured by 1-4 family residential properties 650,550 622,397 Secured by nonfarm, nonresidential properties 3,533,282 3,489,434 Other real estate secured 1,633,830 1,312,551 Other loans secured by real estate: Other construction 829,904 867,793 Secured by 1-4 family residential properties 2,298,993 2,282,318 Commercial and industrial loans 1,840,722 1,922,910 Consumer loans 156,569 165,734 State and other political subdivision loans 969,836 1,088,466 Other commercial loans and leases 589,012 556,035 LHFI 13,089,942 12,950,524 Less ACL 160,270 139,367 Net LHFI $ 12,929,672 $ 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 December 31, 2024 and 2023 ($ in thousands): December 31, 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 $ — $ 366 $ 159 Other secured by 1-4 family residential properties 521 7,275 266 Secured by nonfarm, nonresidential properties 426 13,061 — Other real estate secured 1,904 1,984 — Other loans secured by real estate: Secured by 1-4 family residential properties 1,533 31,583 3,253 Commercial and industrial loans 16 24,525 — Consumer loans — 236 414 Other commercial loans and leases — 1,079 — Total $ 4,400 $ 80,109 $ 4,092 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 loans) at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total LHFI Loans secured by real estate: Construction, land development and other land $ 199 $ — $ 324 $ 523 $ 586,721 $ 587,244 Other secured by 1-4 family residential properties 5,656 1,821 3,223 10,700 639,850 650,550 Secured by nonfarm, nonresidential properties 1,488 380 3,111 4,979 3,528,303 3,533,282 Other real estate secured 1,979 — 28 2,007 1,631,823 1,633,830 Other loans secured by real estate: Other construction — — — — 829,904 829,904 Secured by 1-4 family residential properties 17,898 7,111 21,524 46,533 2,252,460 2,298,993 Commercial and industrial loans 1,114 13,300 8,835 23,249 1,817,473 1,840,722 Consumer loans 1,930 600 414 2,944 153,625 156,569 State and other political subdivision loans 24 — — 24 969,812 969,836 Other commercial loans and leases 168 67 69 304 588,708 589,012 Total $ 30,456 $ 23,279 $ 37,528 $ 91,263 $ 12,998,679 $ 13,089,942 December 31, 2023 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total LHFI Loans secured by real estate: Construction, land development and other land $ 93 $ 507 $ 2,362 $ 2,962 $ 639,924 $ 642,886 Other secured by 1-4 family residential properties 4,493 1,687 2,716 8,896 613,501 622,397 Secured by nonfarm, nonresidential properties 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 : Year Ended December 31, 2024 Payment Concessions Term Extensions Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 3,456 $ 3,456 0.53 % Other loans secured by real estate: Secured by 1-4 family residential properties — 129 129 0.01 % Commercial and industrial loans 6,207 — 6,207 0.34 % Total $ 6,207 $ 3,585 $ 9,792 0.07 % Year Ended December 31, 2023 Payment Concessions Term Extensions Total % of Total Class of Loan Loans secured by real estate: Other secured by 1-4 family residential properties $ — $ 805 $ 805 0.13 % Secured by nonfarm, nonresidential properties — 359 359 0.01 % Other loans secured by real estate: Secured by 1-4 family residential properties — 1,148 1,148 0.05 % Commercial and industrial loans 242 — 242 0.01 % Consumer loans — 36 36 0.02 % Other commercial loans and leases 116 31 147 0.03 % Total $ 358 $ 2,379 $ 2,737 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 : Year Ended December 31, 2024 Financial Effect Payment Concessions Term Extensions Loans secured by real estate: Other secured by 1-4 family residential properties Modified five loans and twenty-five lines of credit to amortize over 24 month terms Other loans secured by real estate: Secured by 1-4 family residential properties Modified nine loans to amortize over weighted average 35 months Commercial and industrial loans Thirty-four month principal payment deferral Year Ended December 31, 2023 Financial Effect Payment Concessions Term Extensions 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 3.4 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 deferrals 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): Year Ended December 31, 2024 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 739 $ 128 $ 50 $ 917 $ 2,539 $ 3,456 Other loans secured by real estate: Secured by 1-4 family residential properties — — — — 129 129 Commercial and industrial loans — — 6,207 6,207 — 6,207 Total $ 739 $ 128 $ 6,257 $ 7,124 $ 2,668 $ 9,792 Year Ended December 31, 2023 Past Due 90 Days Total Current 30-59 Days 60-89 Days or More Past Due Loans Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 290 $ 17 $ — $ 307 $ 498 $ 805 Secured by nonfarm, nonresidential properties — — — — 359 359 Other loans secured by real estate: Secured by 1-4 family residential properties 64 — — 64 1,084 1,148 Commercial and industrial loans — — — — 242 242 Consumer loans 17 — — 17 19 36 Other commercial loans and leases — — — — 147 147 Total $ 371 $ 17 $ — $ 388 $ 2,349 $ 2,737
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 at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Other secured by 1-4 family residential properties $ 521 $ — $ — $ 521 Secured by nonfarm, nonresidential properties 9,783 — — 9,783 Other real estate secured 1,904 — — 1,904 Other loans secured by real estate: Secured by 1-4 family residential properties 1,533 — — 1,533 Commercial and industrial loans — 1,818 20,685 22,503 Other commercial loans and leases — — 896 896 Total $ 13,741 $ 1,818 $ 21,581 $ 37,140 December 31, 2023 Real Estate Vehicles Miscellaneous Total Loans secured by real estate: Construction, land development and other land $ 2,020 $ — $ — $ 2,020 Other secured by 1-4 family residential properties 946 — — 946 Secured by nonfarm, nonresidential properties 20,812 — — 20,812 Other loans secured by real estate: Secured by 1-4 family residential properties 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 December 31, 2024 and 2023 ($ in thousands): Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Commercial LHFI Loans secured by real estate: Construction, land development Pass - RR 1 through RR 6 $ 324,775 $ 83,503 $ 33,580 $ 23,124 $ 8,145 $ 1,587 $ 42,469 $ 517,183 Special Mention - RR 7 2,165 — — — — — 2,002 4,167 Substandard - RR 8 17 62 226 983 — — 176 1,464 Doubtful - RR 9 — — — — — — — — Total 326,957 83,565 33,806 24,107 8,145 1,587 44,647 522,814 Current period gross — — — — — ( 24 ) — ( 24 ) Other secured by 1-4 family residential Pass - RR 1 through RR 6 $ 31,013 $ 24,339 $ 22,693 $ 24,090 $ 11,635 $ 2,106 $ 7,742 $ 123,618 Special Mention - RR 7 27 — — 32 — — — 59 Substandard - RR 8 125 375 555 328 — 191 27 1,601 Doubtful - RR 9 — — — — — — — — Total 31,165 24,714 23,248 24,450 11,635 2,297 7,769 125,278 Current period gross — — — — — ( 16 ) — ( 16 ) Secured by nonfarm, nonresidential Pass - RR 1 through RR 6 $ 542,747 $ 441,159 $ 880,511 $ 429,929 $ 464,504 $ 392,802 $ 127,812 $ 3,279,464 Special Mention - RR 7 16,266 — 52,093 — 17,978 3,335 — 89,672 Substandard - RR 8 10,007 7,321 41,686 37,915 25,601 41,598 — 164,128 Doubtful - RR 9 11 — — — — 7 — 18 Total 569,031 448,480 974,290 467,844 508,083 437,742 127,812 3,533,282 Current period gross — — — ( 2,529 ) — ( 16 ) — ( 2,545 ) Other real estate secured: Pass - RR 1 through RR 6 $ 152,314 $ 157,827 $ 726,814 $ 233,861 $ 137,786 $ 43,478 $ 7,434 $ 1,459,514 Special Mention - RR 7 — 7,450 15,481 41,019 — — 263 64,213 Substandard - RR 8 14,610 — 26,685 42,636 252 25,419 244 109,846 Doubtful - RR 9 — — — — — — — — Total 166,924 165,277 768,980 317,516 138,038 68,897 7,941 1,633,573 Current period gross — — ( 89 ) — — — — ( 89 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Commercial LHFI Other loans secured by real estate: Other construction Pass - RR 1 through RR 6 $ 115,221 $ 410,064 $ 201,526 $ 20,647 $ — $ — $ 18,400 $ 765,858 Special Mention - RR 7 — 2,250 24,557 — — — — 26,807 Substandard - RR 8 — — 17,820 — 19,419 — — 37,239 Doubtful - RR 9 — — — — — — — — Total 115,221 412,314 243,903 20,647 19,419 — 18,400 829,904 Current period gross — ( 14 ) ( 2,493 ) — — — — ( 2,507 ) Commercial and industrial loans: Pass - RR 1 through RR 6 $ 505,557 $ 365,724 $ 231,875 $ 98,318 $ 45,551 $ 27,456 $ 462,740 $ 1,737,221 Special Mention - RR 7 — 564 14,066 15 — — 13,836 28,481 Substandard - RR 8 7,204 1,113 39,698 5,091 891 12,905 7,598 74,500 Doubtful - RR 9 227 — 35 145 1 2 110 520 Total 512,988 367,401 285,674 103,569 46,443 40,363 484,284 1,840,722 Current period gross ( 341 ) ( 1,211 ) ( 640 ) ( 3,251 ) ( 158 ) ( 3,132 ) ( 315 ) ( 9,048 ) State and other political subdivision loans: Pass - RR 1 through RR 6 $ 156,130 $ 82,532 $ 212,528 $ 135,251 $ 78,543 $ 302,709 $ 2,143 $ 969,836 Special Mention - RR 7 — — — — — — — — Substandard - RR 8 — — — — — — — — Doubtful - RR 9 — — — — — — — — Total 156,130 82,532 212,528 135,251 78,543 302,709 2,143 969,836 Current period gross — — — — — — — — Other commercial loans and leases: Pass - RR 1 through RR 6 $ 157,619 $ 148,099 $ 7,371 $ 9,800 $ 15,606 $ 45,227 $ 203,345 $ 587,067 Special Mention - RR 7 — — 116 48 — — — 164 Substandard - RR 8 55 682 116 12 — — 901 1,766 Doubtful - RR 9 9 — 6 — — — — 15 Total 157,683 148,781 7,609 9,860 15,606 45,227 204,246 589,012 Current period gross ( 25 ) — ( 38 ) — — ( 32 ) — ( 95 ) Total commercial LHFI $ 2,036,099 $ 1,733,064 $ 2,550,038 $ 1,103,244 $ 825,912 $ 898,822 $ 897,242 $ 10,044,421 Total commercial LHFI $ ( 366 ) $ ( 1,225 ) $ ( 3,260 ) $ ( 5,780 ) $ ( 158 ) $ ( 3,220 ) $ ( 315 ) $ ( 14,324 ) Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Consumer LHFI Loans secured by real estate: Construction, land development and Current $ 31,478 $ 22,752 $ 4,302 $ 2,762 $ 930 $ 1,804 $ — $ 64,028 Past due 30-89 days — 47 11 — — 106 — 164 Past due 90 days or more 91 — — 68 — — — 159 Nonaccrual — 31 21 4 — 23 — 79 Total 31,569 22,830 4,334 2,834 930 1,933 — 64,430 Current period gross — — — — — ( 8 ) — ( 8 ) Other secured by 1-4 family residential Current $ 24,756 $ 17,202 $ 6,733 $ 5,260 $ 3,651 $ 9,563 $ 445,598 $ 512,763 Past due 30-89 days 569 38 67 66 3 579 4,524 5,846 Past due 90 days or more 21 — 8 — — 17 219 265 Nonaccrual 71 5 69 44 103 593 5,513 6,398 Total 25,417 17,245 6,877 5,370 3,757 10,752 455,854 525,272 Current period gross ( 29 ) ( 87 ) ( 233 ) ( 40 ) ( 31 ) ( 76 ) — ( 496 ) Other real estate secured: Current $ 161 $ — $ — $ — $ 68 $ 28 $ — $ 257 Past due 30-89 days — — — — — — — — Past due 90 days or more — — — — — — — — Nonaccrual — — — — — — — — Total 161 — — — 68 28 — 257 Current period gross — — — — — — — — Term Loans by Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Total As of December 31, 2024 Consumer LHFI Other loans secured by real estate: Secured by 1-4 family residential properties Current $ 274,500 $ 224,266 $ 808,527 $ 459,191 $ 161,856 $ 314,906 $ — $ 2,243,246 Past due 30-89 days 169 4,405 9,883 4,082 814 1,558 — 20,911 Past due 90 days or more 4 1,263 1,098 461 170 257 — 3,253 Nonaccrual 568 3,744 17,306 5,009 1,394 3,562 — 31,583 Total 275,241 233,678 836,814 468,743 164,234 320,283 — 2,298,993 Current period gross — ( 228 ) ( 9,910 ) ( 143 ) ( 6 ) ( 17 ) — ( 10,304 ) Consumer loans: Current $ 55,908 $ 22,226 $ 12,922 $ 4,654 $ 1,188 $ 105 $ 56,423 $ 153,426 Past due 30-89 days 844 396 323 4 — 13 913 2,493 Past due 90 days or more 38 67 17 4 — — 288 414 Nonaccrual 25 49 63 61 19 — 19 236 Total 56,815 22,738 13,325 4,723 1,207 118 57,643 156,569 Current period gross ( 5,929 ) ( 785 ) ( 470 ) ( 131 ) ( 100 ) ( 337 ) ( 2,065 ) ( 9,817 ) Total consumer LHFI $ 389,203 $ 296,491 $ 861,350 $ 481,670 $ 170,196 $ 333,114 $ 513,497 $ 3,045,521 Total consumer LHFI $ ( 5,958 ) $ ( 1,100 ) $ ( 10,613 ) $ ( 314 ) $ ( 137 ) $ ( 438 ) $ ( 2,065 ) $ ( 20,625 ) Total LHFI $ 2,425,302 $ 2,029,555 $ 3,411,388 $ 1,584,914 $ 996,108 $ 1,231,936 $ 1,410,739 $ 13,089,942 Total current period $ ( 6,324 ) $ ( 2,325 ) $ ( 13,873 ) $ ( 6,094 ) $ ( 295 ) $ ( 3,658 ) $ ( 2,380 ) $ ( 34,949 ) 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 development 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 residential 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, nonresidential 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 estate: 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 loans: 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 subdivision loans: 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 LHFI $ 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 development and 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 residential 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, nonresidential 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 estate: Secured by 1-4 family residential properties 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 December 31, 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 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, LHFI and the amortized cost basis of the loans by the measurement methodology used at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 ACL LHFI Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total ACL Individually Evaluated for Credit Loss Collectively Evaluated for Credit Loss Total LHFI Loans secured by real estate: Construction, land development and other land $ — $ 6,452 $ 6,452 $ — 587,244 $ 587,244 Other secured by 1-4 family residential properties — 11,347 11,347 521 650,029 650,550 Secured by nonfarm, nonresidential properties 2,251 35,645 37,896 9,783 3,523,499 3,533,282 Other real estate secured — 19,491 19,491 1,904 1,631,926 1,633,830 Other loans secured by real estate: Other construction — 13,297 13,297 — 829,904 829,904 Secured by 1-4 family residential properties — 32,129 32,129 1,533 2,297,460 2,298,993 Commercial and industrial loans 10,518 16,502 27,020 22,503 1,818,219 1,840,722 Consumer loans — 5,141 5,141 — 156,569 156,569 State and other political subdivision loans — 1,250 1,250 — 969,836 969,836 Other commercial loans and leases 892 5,355 6,247 896 588,116 589,012 Total $ 13,661 $ 146,609 $ 160,270 $ 37,140 $ 13,052,802 $ 13,089,942 December 31, 2023 ACL LHFI Individually Evaluated 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 other land $ — $ 17,192 $ 17,192 $ 2,020 $ 640,866 $ 642,886 Other secured by 1-4 family residential properties — 12,942 12,942 946 621,451 622,397 Secured by nonfarm, nonresidential properties — 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 properties — 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): Years Ended December 31, 2024 2023 2022 Balance at beginning of period $ 139,367 $ 120,214 $ 99,457 Loans charge-off, sale of 1-4 family mortgage loans ( 8,633 ) — — Loans charged-off ( 26,316 ) ( 17,515 ) ( 11,332 ) Recoveries 9,932 9,306 10,412 Net (charge-offs) recoveries ( 25,017 ) ( 8,209 ) ( 920 ) PCL, LHFI 37,287 27,362 21,677 PCL, LHFI sale of 1-4 family mortgage loans 8,633 — — Balance at end of period $ 160,270 $ 139,367 $ 120,214 The following tables detail changes in the ACL, LHFI by loan class for the years ended December 31, 2024 and 2023 ($ in thousands): 2024 Balance Balance January 1, Charge-offs Recoveries PCL December 31, Loans secured by real estate: Construction, land development and other land $ 17,192 $ ( 32 ) $ 1,024 $ ( 11,732 ) $ 6,452 Other secured by 1-4 family residential properties 12,942 ( 512 ) 672 ( 1,755 ) 11,347 Secured by nonfarm, nonresidential properties 24,043 ( 2,545 ) 154 16,244 37,896 Other real estate secured 4,488 ( 89 ) 1 15,091 19,491 Other loans secured by real estate: Other construction 5,758 ( 2,507 ) 714 9,332 13,297 Secured by 1-4 family residential properties 34,794 ( 10,304 ) 152 7,487 32,129 Commercial and industrial loans 26,638 ( 9,048 ) 963 8,467 27,020 Consumer loans 5,794 ( 9,817 ) 6,187 2,977 5,141 State and other political subdivision loans 646 — — 604 1,250 Other commercial loans and leases 7,072 ( 95 ) 65 ( 795 ) 6,247 Total $ 139,367 $ ( 34,949 ) $ 9,932 $ 45,920 $ 160,270 2023 Balance Balance January 1, Charge-offs Recoveries PCL December 31, Loans secured by real estate: Construction, land development and other land $ 12,828 $ ( 242 ) $ 142 $ 4,464 $ 17,192 Other secured by 1-4 family residential properties 12,374 ( 320 ) 439 449 12,942 Secured by nonfarm, nonresidential properties 19,488 ( 278 ) 2,328 2,505 24,043 Other real estate secured 4,743 — 28 ( 283 ) 4,488 Other loans secured by real estate: Other construction 15,132 ( 3,453 ) 73 ( 5,994 ) 5,758 Secured by 1-4 family residential properties 21,185 ( 1,457 ) 38 15,028 34,794 Commercial and industrial loans 23,140 ( 2,161 ) 1,066 4,593 26,638 Consumer loans 5,792 ( 9,290 ) 5,192 4,100 5,794 State and other political subdivision loans 885 — — ( 239 ) 646 Other commercial loans and leases 4,647 ( 314 ) — 2,739 7,072 Total $ 120,214 $ ( 17,515 ) $ 9,306 $ 27,362 $ 139,367

Premises and Equipment, Net (Ta

Premises and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Premises and Equipment, Net	At December 31, 2024 and 2023, premises and equipment, net consisted of the following ($ in thousands): December 31, 2024 2023 Land $ 56,610 $ 56,747 Buildings and leasehold improvements 249,405 246,759 Furniture and equipment 227,329 210,158 Total cost of premises and equipment 533,344 513,664 Less accumulated depreciation and amortization 302,201 286,383 Premises and equipment, net 231,143 227,281 Finance lease right-of-use assets 3,299 3,751 Assets held for sale 968 1,197 Total premises and equipment, net $ 235,410 $ 232,229

Mortgage Banking (Tables)

Mortgage Banking (Tables)	12 Months Ended
	Dec. 31, 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): Years Ended December 31, 2024 2023 Balance at beginning of period $ 131,870 $ 129,677 Origination of servicing assets 13,291 13,712 Change in fair value: Due to market changes 5,801 ( 1,489 ) Due to runoff ( 11,645 ) ( 10,030 ) Balance at end of period $ 139,317 $ 131,870
Schedule of Mortgage Loans Sold and Serviced for Others	The table below details the mortgage loans sold and serviced for others at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Federal National Mortgage Association $ 4,821,246 $ 4,826,028 Government National Mortgage Association 3,695,419 3,510,983 Federal Home Loan Mortgage Corporation 213,358 112,352 Other 32,686 28,012 Total mortgage loans sold and serviced for others $ 8,762,709 $ 8,477,375

Goodwill and Identifiable Int_2

Goodwill and Identifiable Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill by segment	The table below illustrates goodwill by segment for the years ended December 31, 2024 and 2023 ($ in thousands): General Banking Balance as of January 1, 2023 $ 334,605 Adjustment during 2023 — Balance as of December 31, 2023 334,605 Adjustment during 2024 — Balance as of December 31, 2024 $ 334,605
Schedule of identifiable intangible assets	At December 31, 2024 and 2023, identifiable intangible assets consisted of the following ($ in thousands): December 31, 2024 December 31, 2023 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Core deposit intangibles $ 87,674 $ 87,548 $ 126 $ 87,674 $ 87,438 $ 236 Banking charters — — — 1,325 1,325 — Total $ 87,674 $ 87,548 $ 126 $ 88,999 $ 88,763 $ 236 The following table illustrates the carrying amounts and remaining weighted-average amortization periods of identifiable intangible assets at December 31, 2024 ($ in thousands): Remaining Weighted- Average Net Carrying Amortization Amount Period in Years Core deposit intangibles $ 126 1.0

Other Real Estate (Tables)

Other Real Estate (Tables)	12 Months Ended
	Dec. 31, 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): Years Ended December 31, 2024 2023 2022 Balance at beginning of period $ 6,867 $ 1,986 $ 4,557 Additions 6,782 7,237 1,533 Disposals ( 6,084 ) ( 2,555 ) ( 4,142 ) (Write-downs) recoveries ( 1,648 ) 199 38 Balance at end of period $ 5,917 $ 6,867 $ 1,986 Gains (losses), net on the sale of other real estate $ ( 1,104 ) $ ( 145 ) $ ( 1,006 )
Other Real Estate, By Type of Property	At December 31, 2024 and 2023, other real estate by type of property consisted of the following ($ in thousands): December 31, 2024 2023 Construction, land development and other land properties $ 46 $ — 1-4 family residential properties 2,260 1,977 Nonfarm, nonresidential properties 3,611 4,835 Other real estate properties — 55 Total other real estate $ 5,917 $ 6,867
Other Real Estate, By Geographic Location	At December 31, 2024 and 2023, other real estate by geographic location consisted of the following ($ in thousands): December 31, 2024 2023 Alabama $ 170 $ 1,397 Mississippi (1) 2,407 1,242 Tennessee (2) 1,079 — Texas 2,261 4,228 Total other real estate $ 5,917 $ 6,867 (1) Mississippi includes Central and Southern Mississippi Regions. (2) Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 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 at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Leases receivable $ 282,771 $ 161,319 Unearned income ( 45,585 ) ( 29,011 ) Initial direct costs 2,252 1,326 Unguaranteed lease residual 7,084 4,101 Total net investment $ 246,522 $ 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 December 31, 2024 ($ in thousands): December 31, 2024 2025 $ 50,494 2026 49,906 2027 62,457 2028 52,086 2029 38,486 Thereafter 29,342 Total leases receivable $ 282,771
Components of Net Lease Cost	The table below details the components of net lease cost for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Finance leases Amortization of right-of-use assets $ 452 $ 786 $ 1,479 Interest on lease liabilities 148 163 188 Operating lease cost 5,075 4,787 4,577 Short-term lease cost 230 229 307 Variable lease cost 841 840 1,080 Sublease income ( 122 ) ( 12 ) ( 168 ) Net lease cost $ 6,624 $ 6,793 $ 7,463
Cash Payments Included in Measurement of Lease Liabilities	The table below details the cash payments included in the measurement of lease liabilities during the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Finance leases Operating cash flows included in operating activities $ 148 $ 163 $ 188 Financing cash flows included in payments under finance lease 424 721 1,409 Operating leases Operating cash flows (fixed payments) included in other operating 4,848 3,666 4,242 Operating cash flows (liability reduction) included in other operating 3,473 3,204 3,514
Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases	The table below details balance sheet information, as well as weighted-average lease terms and discount rates, related to leases at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Finance lease right-of-use assets, net of accumulated depreciation $ 3,299 $ 3,751 Finance lease liabilities 3,910 4,334 Operating lease right-of-use assets 34,668 35,711 Operating lease liabilities 38,698 39,097 Weighted-average lease term Finance leases 7.35 years 8.34 years Operating leases 9.31 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 December 31, 2024, future minimum rental commitments under finance and operating leases were as follows ($ in thousands): Finance Leases Operating Leases 2025 $ 584 $ 5,288 2026 589 5,161 2027 594 5,193 2028 599 4,824 2029 633 4,655 Thereafter 1,454 21,258 Total minimum lease payments 4,453 46,379 Less imputed interest ( 543 ) ( 7,681 ) Lease liabilities $ 3,910 $ 38,698

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2024
Deposits [Abstract]
Deposits Summary	At December 31, 2024 and 2023, deposits consisted of the following ($ in thousands): December 31, 2024 2023 Noninterest-bearing demand $ 3,073,565 $ 3,197,620 Interest-bearing demand 5,453,708 4,947,626 Savings 3,387,984 4,047,853 Time 3,192,918 3,376,664 Total $ 15,108,175 $ 15,569,763
Interest Expense on Deposits by Type	Interest expense on deposits by type consisted of the following for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Interest-bearing demand $ 148,888 $ 121,138 $ 16,409 Savings 30,121 28,605 9,654 Time 150,372 96,208 3,006 Total $ 329,381 $ 245,951 $ 29,069
Maturities of Interest-Bearing Deposits	The maturities of interest-bearing deposits at December 31, 2024, are as follows ($ in thousands): 2025 $ 3,090,620 2026 75,164 2027 15,143 2028 5,764 2029 5,169 Thereafter 1,058 Total time deposits 3,192,918 Interest-bearing deposits with no stated maturity 8,841,692 Total interest-bearing deposits $ 12,034,610

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of Securities Sold Under Repurchase Agreements	The following table presents the securities sold under repurchase agreements by collateral pledged at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Mortgage-backed securities Residential mortgage pass-through securities Issued by FNMA and FHLMC $ 11,685 $ 28,600 Other residential mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 7,487 526 Commercial mortgage-backed securities Issued or guaranteed by FNMA, FHLMC or GNMA 10,169 — Total securities sold under repurchase agreements $ 29,341 $ 29,126
Summary of Other Borrowings	At December 31, 2024 and 2023, other borrowings consisted of the following ($ in thousands): December 31, 2024 2023 FHLB advances $ 200,000 $ 400,058 Serviced GNMA loans eligible for repurchase 97,631 78,838 Finance lease liabilities 3,910 4,334 Total other borrowings $ 301,541 $ 483,230

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Summary of Noninterest Income (Loss) Disaggregated by Reportable Operating Segment and Revenue Stream	The following table presents noninterest income (loss) disaggregated by reportable operating segment and revenue stream for the periods presented ($ in thousands): Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total Topic 606 Not Topic (1) Total General Banking Service charges on $ 44,295 $ — $ 44,295 $ 43,329 $ — $ 43,329 $ 42,073 $ — $ 42,073 Bank card and other fees 31,010 2,138 33,148 30,387 2,995 33,382 31,474 4,584 36,058 Mortgage banking, net — 26,626 26,626 — 26,216 26,216 — 28,306 28,306 Wealth management 748 — 748 838 — 838 639 — 639 Other, net 16,906 337 17,243 11,769 ( 2,076 ) 9,693 8,469 805 9,274 Securities gains (losses), — ( 182,792 ) ( 182,792 ) — 39 39 — — — Total noninterest $ 92,959 $ ( 153,691 ) $ ( 60,732 ) $ 86,323 $ 27,174 $ 113,497 $ 82,655 $ 33,695 $ 116,350 Wealth Management Service charges on $ 87 $ — $ 87 $ 87 $ — $ 87 $ 84 $ — $ 84 Bank card and other fees 153 — 153 57 — 57 47 — 47 Wealth management 36,503 — 36,503 34,254 — 34,254 34,374 — 34,374 Other, net 193 377 570 162 376 538 528 39 567 Total noninterest $ 36,936 $ 377 $ 37,313 $ 34,560 $ 376 $ 34,936 $ 35,033 $ 39 $ 35,072 Consolidated Service charges on $ 44,382 $ — $ 44,382 $ 43,416 $ — $ 43,416 $ 42,157 $ — $ 42,157 Bank card and other fees 31,163 2,138 33,301 30,444 2,995 33,439 31,521 4,584 36,105 Mortgage banking, net — 26,626 26,626 — 26,216 26,216 — 28,306 28,306 Wealth management 37,251 — 37,251 35,092 — 35,092 35,013 — 35,013 Other, net 17,099 714 17,813 11,931 ( 1,700 ) 10,231 8,997 844 9,841 Securities gains (losses), — ( 182,792 ) ( 182,792 ) — 39 39 — — — Total noninterest $ 129,895 $ ( 153,314 ) $ ( 23,419 ) $ 120,883 $ 27,550 $ 148,433 $ 117,688 $ 33,734 $ 151,422 (1) Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card income within bank card and other fees; mortgage banking, net; amortization of tax credits, accretion of the FDIC indemnification asset, 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 securities gains (losses), net.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Tax Provision	The income tax provision attributable to continuing operations included in the consolidated statements of income was as follows for the periods presented ($ in thousands): Years Ended December 31, 2024 2023 2022 Current Federal $ ( 28,470 ) $ 26,100 $ 12,362 State ( 6,563 ) 6,392 2,560 Deferred Federal 19,104 ( 3,798 ) ( 13,388 ) State 4,776 ( 950 ) ( 3,347 ) Income tax provision $ ( 11,153 ) $ 27,744 $ ( 1,813 )
Income Tax Reconciliation	For the periods presented, the income tax provision attributable to continuing operations differs from the amount computed by applying the statutory federal income tax rate in effect for each respective period to income before income taxes as a result of the following ($ in thousands): Years Ended December 31, 2024 2023 2022 Income tax computed at statutory tax rate $ 7,152 $ 38,018 $ 12,412 Tax exempt interest ( 5,605 ) ( 5,521 ) ( 4,419 ) Nondeductible interest expense 2,153 2,104 271 State income taxes, net ( 5,185 ) 5,050 2,025 Income tax credits, net ( 11,483 ) ( 11,904 ) ( 10,071 ) Death benefit gains ( 92 ) ( 80 ) ( 287 ) Other 1,907 77 ( 1,744 ) Income tax provision $ ( 11,153 ) $ 27,744 $ ( 1,813 )
Deferred Tax Assets and Liabilities	Temporary differences between the financial statement carrying amounts and the tax basis of assets and liabilities gave rise to the following net deferred tax assets at December 31, 2024 and 2023, which are included in other assets on the accompanying consolidated balance sheets ($ in thousands): December 31, 2024 2023 Deferred tax assets: Litigation losses $ — $ 26,647 Other real estate 2,293 1,743 Accumulated credit losses 47,416 43,473 Deferred compensation 19,299 17,893 Finance and operating lease liabilities 10,652 11,426 Realized built-in losses 7,679 8,429 Securities 22,294 68,223 Pension and other postretirement benefit plans 1,574 2,025 Interest on nonaccrual loans 1,173 1,218 LHFS 236 777 Stock-based compensation 3,544 3,196 Derivatives 4,018 2,993 Tax credit carryforward 3,489 — Other 8,745 10,543 Gross deferred tax asset 132,412 198,586 Deferred tax liabilities: Goodwill and other identifiable intangibles 13,880 14,297 Premises and equipment 14,218 17,382 Finance and operating lease right-of-use assets 9,492 10,420 MSR 29,206 26,271 Securities 3,789 3,181 Equipment financing 8,803 — Other 2,874 2,264 Gross deferred tax liability 82,262 73,815 Net deferred tax asset $ 50,150 $ 124,771
Changes in Unrecognized Tax Benefits	The following table provides a summary of the changes during the calendar years presented in the amount of unrecognized tax benefits that are included in other liabilities in the consolidated balance sheet ($ in thousands): December 31, 2024 2023 2022 Balance at beginning of period $ 2,864 $ 2,316 $ 2,129 Change due to tax positions taken during the current year 1,497 1,333 653 Change due to tax positions taken during a prior year ( 1,076 ) ( 426 ) ( 266 ) Change due to the lapse of applicable statute of limitations during the ( 407 ) ( 359 ) ( 200 ) Balance at end of period $ 2,878 $ 2,864 $ 2,316 Accrued interest, net of federal benefit $ 415 $ 470 $ 489 Unrecognized tax benefits that would impact the effective $ 2,579 $ 2,518 $ 1,948

Defined Benefit and Other Pos_2

Defined Benefit and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2024
Trustmark Capital Accumulation Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan Benefit Obligation, Plan Assets and Funded Status of the Plan	The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for the Continuing Plan for the periods presented ($ in thousands): December 31, 2024 2023 Change in benefit obligation: Benefit obligation, beginning of year $ 5,923 $ 6,907 Service cost 40 52 Interest cost 246 292 Actuarial (gain) loss ( 214 ) 164 Benefits paid ( 464 ) ( 1,492 ) Benefit obligation, end of year $ 5,531 $ 5,923 Change in plan assets: Fair value of plan assets, beginning of year $ 2,403 $ 2,907 Actual return on plan assets 233 237 Employer contributions 513 751 Benefit payments ( 464 ) ( 1,492 ) Fair value of plan assets, end of year $ 2,685 $ 2,403 Funded status at end of year - net liability $ ( 2,846 ) $ ( 3,520 ) Amounts recognized in accumulated other comprehensive loss: Net (gain) loss - amount recognized $ ( 601 ) $ ( 262 ) Actuarial (gain) loss included in benefit obligation: Change in discount rate $ ( 344 ) $ 124 Change in mortality table — ( 38 ) Other 130 78 Actuarial (gain) loss $ ( 214 ) $ 164
Net Periodic Benefit Cost	Years Ended December 31, 2024 2023 2022 Net periodic benefit cost: Service cost $ 40 $ 52 $ 115 Interest cost 246 292 192 Expected return on plan assets ( 96 ) ( 107 ) ( 121 ) Recognized net (gain) loss due to lump sum settlements ( 13 ) 25 — Recognized net actuarial loss — — 224 Net periodic benefit cost $ 177 $ 262 $ 410 Other changes in plan assets and benefit obligation recognized in other Net loss - Total recognized in other comprehensive income (loss) $ ( 339 ) $ 9 $ ( 1,699 ) Total recognized in net periodic benefit cost and other comprehensive $ ( 162 ) $ 271 $ ( 1,289 ) Weighted-average assumptions as of end of year: Discount rate for benefit obligation 5.30 % 4.67 % 4.88 % Discount rate for net periodic benefit cost 4.67 % 4.88 % 2.41 % Expected long-term return on plan assets 5.00 % 5.00 % 5.00 %
Weighted-Average Asset Allocation	The weighted-average asset allocations by asset category are presented below for the Continuing Plan at December 31, 2024 and 2023. December 31, 2024 2023 Money market fund 2.0 % 27.0 % Exchange traded funds: Equity securities 33.0 % 36.0 % Fixed income 59.0 % 28.0 % International 6.0 % 9.0 % Total 100.0 % 100.0 %
Plan Assets Measured at Fair Value	The following tables set forth by level, within the fair value hierarchy, the Continuing Plan’s assets measured at fair value at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 Total Level 1 Level 2 Level 3 Money market fund $ 55 $ 55 $ — $ — Exchange traded funds: Equity securities 874 874 — — Fixed income 1,600 1,600 — — International 156 156 — — Total assets at fair value $ 2,685 $ 2,685 $ — $ — December 31, 2023 Total Level 1 Level 2 Level 3 Money market fund $ 643 $ 643 $ — $ — Exchange traded funds: Equity securities 861 861 — — Fixed income 690 690 — — International 209 209 — — Total assets at fair value $ 2,403 $ 2,403 $ — $ —
Estimated Future Benefit Payments and Other Disclosures	The following table presents the expected benefit payments, which reflect expected future service, for the Continuing Plan ($ in thousands): Year Amount 2025 $ 693 2026 762 2027 961 2028 535 2029 414 2030 - 2034 1,575
Supplemental Retirement Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan Benefit Obligation, Plan Assets and Funded Status of the Plan	The following tables present information regarding the benefit obligation, plan assets, funded status, amounts recognized in accumulated other comprehensive loss, net periodic benefit cost and other statistical disclosures for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands): December 31, 2024 2023 Change in benefit obligation: Benefit obligation, beginning of year $ 41,619 $ 43,201 Service cost 45 69 Interest cost 1,851 2,013 Actuarial (gain) loss ( 1,009 ) 763 Benefits paid ( 4,344 ) ( 4,427 ) Benefit obligation, end of year $ 38,162 $ 41,619 Change in plan assets: Fair value of plan assets, beginning of year $ — $ — Employer contributions 4,344 4,427 Benefit payments ( 4,344 ) ( 4,427 ) Fair value of plan assets, end of year $ — $ — Funded status at end of year - net liability $ ( 38,162 ) $ ( 41,619 ) Amounts recognized in accumulated other comprehensive loss: Net loss $ 6,880 $ 8,235 Prior service cost 15 126 Amounts recognized $ 6,895 $ 8,361 Actuarial (gain) loss included in benefit obligation: Change in discount rate $ ( 1,794 ) $ 649 Change in mortality table — ( 308 ) Other 785 422 Actuarial (gain) loss $ ( 1,009 ) $ 763
Net Periodic Benefit Cost	Years Ended December 31, 2024 2023 2022 Net periodic benefit cost: Service cost $ 45 $ 69 $ 71 Interest cost 1,851 2,013 1,278 Amortization of prior service cost 111 111 111 Recognized net actuarial loss 346 284 986 Net periodic benefit cost $ 2,353 $ 2,477 $ 2,446 Other changes in plan assets and benefit obligation recognized in other Net (gain) loss $ ( 1,355 ) $ 479 $ ( 10,181 ) Amortization of prior service cost ( 111 ) ( 111 ) ( 111 ) Total recognized in other comprehensive income (loss) $ ( 1,466 ) $ 368 $ ( 10,292 ) Total recognized in net periodic benefit cost and other comprehensive $ 887 $ 2,845 $ ( 7,846 ) Weighted-average assumptions as of end of year: Discount rate for benefit obligation 5.30 % 4.67 % 4.88 % Discount rate for net periodic benefit cost 4.67 % 4.88 % 2.41 %
Estimated Future Benefit Payments and Other Disclosures	The following table presents the expected benefits payments for Trustmark’s supplemental retirement plans ($ in thousands): Year Amount 2025 $ 3,885 2026 3,850 2027 3,673 2028 3,550 2029 3,545 2030 - 2034 15,563

Stock and Incentive Compensat_2

Stock and Incentive Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2024
Compensation Expense for Awards Under Stock Plan	The following table presents information regarding compensation expense for units under the Stock Plan for the periods presented ($ in thousands): At December 31, 2024 Recognized Compensation Expense Unrecognized Weighted Average for Years Ended December 31, Compensation Life of Unrecognized 2024 2023 2022 Expense Compensation Expense Performance awards $ 2,827 $ 1,772 $ 1,258 $ 2,110 1.67 Time-based awards 4,388 4,383 3,625 2,815 1.63 Total $ 7,215 $ 6,155 $ 4,883 $ 4,925
Performance Based Award [Member]
Summary of Stock Plan Activity	The following table summarizes Trustmark’s performance unit activity for the periods presented: Years Ended December 31, 2024 2023 2022 Weighted- Weighted- Weighted- Average Average Average Grant-Date Grant-Date Grant-Date Shares Fair Value Shares Fair Value Shares Fair Value Nonvested shares, beginning of year 174,214 $ 30.81 148,416 $ 31.63 140,821 $ 31.80 Granted 80,580 26.67 70,666 29.78 60,773 32.64 Adjustment for performance factor 9,348 30.02 — — — — Released from restriction ( 54,973 ) 30.02 ( 39,943 ) 31.98 ( 19,723 ) 33.40 Forfeited ( 1,124 ) 28.32 ( 4,925 ) 31.41 ( 33,455 ) 33.11 Nonvested shares, end of year 208,045 $ 29.39 174,214 $ 30.81 148,416 $ 31.63
Time-based Awards [Member]
Summary of Stock Plan Activity	The following table summarizes Trustmark’s time-based unit activity for the periods presented: Years Ended December 31, 2024 2023 2022 Weighted- Weighted- Weighted- Average Average Average Grant-Date Grant-Date Grant-Date Shares Fair Value Shares Fair Value Shares Fair Value Nonvested shares, beginning of year 358,252 $ 30.04 312,978 $ 30.99 337,466 $ 31.18 Granted 167,646 27.27 145,003 28.59 133,307 31.85 Released from restriction ( 140,637 ) 28.63 ( 90,587 ) 30.90 ( 148,905 ) 32.16 Forfeited ( 12,985 ) 28.79 ( 9,142 ) 30.72 ( 8,890 ) 31.62 Nonvested shares, end of year 372,276 $ 29.37 358,252 $ 30.04 312,978 $ 30.99

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 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): Years Ended December 31, 2024 2023 2022 Balance at beginning of period $ 34,057 $ 36,838 $ 35,623 PCL, off-balance sheet credit exposures ( 4,665 ) ( 2,781 ) 1,215 Balance at end of period $ 29,392 $ 34,057 $ 36,838

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 2024 and 2023 ($ in thousands): Actual Regulatory Capital Minimum To Be Well Amount Ratio Requirement Capitalized At December 31, 2024: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,729,672 11.54 % 7.000 % n/a Trustmark National Bank 1,828,044 12.20 % 7.000 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,789,672 11.94 % 8.500 % n/a Trustmark National Bank 1,828,044 12.20 % 8.500 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 2,094,874 13.97 % 10.500 % n/a Trustmark National Bank 2,009,544 13.41 % 10.500 % 10.00 % Tier 1 Leverage (to Average Assets) Trustmark Corporation $ 1,789,672 9.99 % 4.00 % n/a Trustmark National Bank 1,828,044 10.21 % 4.00 % 5.00 % At December 31, 2023: Common Equity Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,521,665 10.04 % 7.000 % n/a Trustmark National Bank 1,602,327 10.58 % 7.000 % 6.50 % Tier 1 Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,581,665 10.44 % 8.500 % n/a Trustmark National Bank 1,602,327 10.58 % 8.500 % 8.00 % Total Capital (to Risk Weighted Assets) Trustmark Corporation $ 1,862,246 12.29 % 10.500 % n/a Trustmark National Bank 1,759,426 11.61 % 10.500 % 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	Before Tax Tax (Expense) Net of Tax Amount Benefit Amount Year Ended December 31, 2024 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ ( 13,666 ) $ 3,417 $ ( 10,249 ) Reclassification adjustment for net (gains) losses realized in net income 182,792 ( 45,698 ) 137,094 Change in net unrealized holding loss on securities transferred to held to maturity 14,587 ( 3,647 ) 10,940 Total securities available for sale and transferred securities 183,713 ( 45,928 ) 137,785 Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement 1,460 ( 365 ) 1,095 Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Recognized net loss due to lump sum settlements ( 13 ) 3 ( 10 ) Change in net actuarial loss 248 ( 62 ) 186 Total pension and other postretirement benefit plans 1,806 ( 452 ) 1,354 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 22,232 ) 5,558 ( 16,674 ) Reclassification adjustment for (gain) loss realized in net income 18,132 ( 4,533 ) 13,599 Total cash flow hedge derivatives ( 4,100 ) 1,025 ( 3,075 ) Total other comprehensive income (loss) $ 181,419 $ ( 45,355 ) $ 136,064 Year Ended December 31, 2023 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ 50,537 $ ( 12,404 ) $ 38,133 Reclassification adjustment for net (gains) losses realized in net income ( 39 ) 10 ( 29 ) Change in net unrealized holding loss on securities transferred to held to maturity 15,557 ( 3,889 ) 11,668 Total securities available for sale and transferred securities 66,055 ( 16,283 ) 49,772 Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement ( 691 ) 173 ( 518 ) Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Recognized net loss due to lump sum settlements 25 ( 6 ) 19 Change in net actuarial loss 177 ( 44 ) 133 Total pension and other postretirement benefit plans ( 378 ) 95 ( 283 ) Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 8,131 ) 2,033 ( 6,098 ) Reclassification adjustment for (gain) loss realized in net income 16,385 ( 4,096 ) 12,289 Total cash flow hedge derivatives 8,254 ( 2,063 ) 6,191 Total other comprehensive income (loss) $ 73,931 $ ( 18,251 ) $ 55,680 Year Ended December 31, 2022 Securities available for sale and transferred securities: Net unrealized holding gains (losses) arising during the period $ ( 229,524 ) $ 57,381 $ ( 172,143 ) Change in net unrealized holding loss on securities transferred to held to maturity ( 86,033 ) 21,508 ( 64,525 ) Total securities available for sale and transferred securities ( 315,557 ) 78,889 ( 236,668 ) Pension and other postretirement benefit plans: Change in the actuarial loss of pension and other postretirement 10,792 ( 2,698 ) 8,094 Reclassification adjustments for changes realized in net income: Net change in prior service costs 111 ( 28 ) 83 Change in net actuarial loss 1,089 ( 272 ) 817 Total pension and other postretirement benefit plans 11,992 ( 2,998 ) 8,994 Cash flow hedge derivatives: Change in accumulated gain (loss) on effective cash flow hedge derivatives ( 20,685 ) 5,171 ( 15,514 ) Reclassification adjustment for (gain) loss realized in net income 460 ( 115 ) 345 Total cash flow hedge derivatives ( 20,225 ) 5,056 ( 15,169 ) Total other comprehensive income (loss) $ ( 323,790 ) $ 80,947 $ ( 242,843 )
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 Transferred Defined Cash Flow Hedge Derivative Total Balance, January 1, 2022 $ ( 17,774 ) $ ( 14,786 ) $ — $ ( 32,560 ) Other comprehensive income (loss) before ( 236,668 ) 8,094 ( 15,514 ) ( 244,088 ) Amounts reclassified from accumulated other — 900 345 1,245 Net other comprehensive income (loss) ( 236,668 ) 8,994 ( 15,169 ) ( 242,843 ) Balance, December 31, 2022 ( 254,442 ) ( 5,792 ) ( 15,169 ) ( 275,403 ) Other comprehensive income (loss) before 49,801 ( 518 ) ( 6,098 ) 43,185 Amounts reclassified from accumulated other ( 29 ) 235 12,289 12,495 Net other comprehensive income (loss) 49,772 ( 283 ) 6,191 55,680 Balance, December 31, 2023 ( 204,670 ) ( 6,075 ) ( 8,978 ) ( 219,723 ) Other comprehensive income (loss) before reclassification 691 1,095 ( 16,674 ) ( 14,888 ) Amounts reclassified from accumulated other 137,094 259 13,599 150,952 Net other comprehensive income (loss) 137,785 1,354 ( 3,075 ) 136,064 Balance, December 31, 2024 $ ( 66,885 ) $ ( 4,721 ) $ ( 12,053 ) $ ( 83,659 )

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 2024 and 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 years ended December 31, 2024 and 2023. December 31, 2024 Total Level 1 Level 2 Level 3 U.S. Treasury securities $ 202,669 $ 202,669 $ — $ — U.S. Government agency obligations 38,807 — 38,807 — Mortgage-backed securities 1,451,058 — 1,451,058 — Securities available for sale 1,692,534 202,669 1,489,865 — LHFS 200,307 — 200,307 — MSR 139,317 — — 139,317 Other assets - derivatives 15,397 18 15,150 229 Other liabilities - derivatives 41,355 2,183 39,172 — 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 — Obligations of states and political subdivisions — — — — 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 years ended December 31, 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) ( 5,844 ) 2,229 Additions 13,291 — Sales — ( 2,845 ) Balance, December 31, 2024 $ 139,317 $ 229 The amount of total gains (losses) for the period included in earnings that are $ 5,801 $ 1,681 Balance, January 1, 2023 $ 129,677 $ 157 Total net (loss) gain included in Mortgage banking, net (1) ( 11,519 ) 2,470 Additions 13,712 — Sales — ( 1,782 ) Balance, December 31, 2023 $ 131,870 $ 845 The amount of total gains (losses) for the period included in earnings that are $ ( 1,489 ) $ 1,103 (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 December 31, 2024 and 2023 were as follows ($ in thousands): December 31, 2024 December 31, 2023 Carrying Estimated Carrying Estimated Financial Assets: Level 2 Inputs: Cash and short-term investments $ 567,251 $ 567,251 $ 975,343 $ 975,343 Securities held to maturity 1,335,385 1,259,107 1,426,279 1,355,504 Level 3 Inputs: Net LHFI 12,929,672 12,886,168 12,811,157 12,762,505 Financial Liabilities: Level 2 Inputs: Deposits 15,108,175 15,098,854 15,569,763 15,553,417 Federal funds purchased and securities sold under 324,008 324,008 405,745 405,745 Other borrowings 301,541 301,541 483,230 483,226 Subordinated notes 123,702 120,625 123,482 108,125 Junior subordinated debt securities 61,856 49,794 61,856 46,856
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 the LHFS accounted for under the fair value option at December 31, 2024 and 2023 ($ in thousands): December 31, 2024 2023 Fair value of LHFS $ 102,676 $ 105,974 LHFS contractual principal outstanding 105,322 102,994 Fair value less unpaid principal $ ( 2,646 ) $ 2,980

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 2024 and 2023 as well as the effect of these derivative instruments on Trustmark’s results of operations for the periods presented ($ in thousands): December 31, 2024 2023 Derivatives in hedging relationships Interest rate contracts: Interest rate swaps included in other assets (1) $ 74 $ 1,182 Interest rate floors included in other assets 1,582 1,689 Interest rate swaps included in other liabilities (1) 5,958 267 Derivatives not designated as hedging instruments Interest rate contracts: Exchange traded purchased options included in other assets $ 18 $ 180 OTC written options (rate locks) included in other assets 229 845 Futures contracts included in other assets — 7,505 Interest rate swaps included in other assets (1) 13,478 11,910 Credit risk participation agreements included in other assets 16 5 Futures contracts included in other liabilities 1,972 — Forward contracts included in other liabilities ( 679 ) 994 Exchange traded written options included in other liabilities 211 21 Interest rate swaps included in other liabilities (1) 33,817 34,255 Credit risk participation agreements included in other liabilities 76 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	Years Ended December 31, 2024 2023 2022 Derivatives in hedging relationships Amount of gain (loss) reclassified from accumulated other $ ( 18,132 ) $ ( 16,385 ) $ ( 460 ) Derivatives not designated as hedging instruments Amount of gain (loss) recognized in mortgage banking, net $ ( 13,965 ) $ ( 5,281 ) $ ( 43,764 ) Amount of gain (loss) recognized in bank card and other fees 135 271 403
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): Years Ended December 31, 2024 2023 2022 Derivatives in cash flow hedging relationship Amount of gain (loss) recognized in other comprehensive $ ( 16,674 ) $ ( 6,098 ) $ ( 15,514 )
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 at December 31, 2024 and 2023 is presented in the following tables ($ in thousands): Offsetting of Derivative Assets As of December 31, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 15,134 $ — $ 15,134 $ ( 7,956 ) $ ( 2,000 ) $ 5,178 Offsetting of Derivative Liabilities As of December 31, 2024 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of Financial Cash Collateral Net Amount Derivatives $ 39,775 $ — $ 39,775 $ ( 7,956 ) $ ( 1,460 ) $ 30,359 Offsetting of Derivative Assets As of December 31, 2023 Gross Amounts Not Offset in the Gross Gross Amounts Net Amounts of the Statement 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)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Information	The following tables disclose financial information by reportable segment for the periods presented ($ in thousands): Year Ended December 31, 2024 General Banking Wealth Management Consolidated Interest income $ 949,600 $ 10,730 $ 960,330 Interest expense 373,369 2,540 375,909 Funds transfer pricing, net 2,231 ( 2,231 ) — Net interest income 578,462 5,959 584,421 PCL 41,101 154 41,255 Net interest income after PCL 537,361 5,805 543,166 Service charges on deposit accounts 44,295 87 44,382 Bank card and other fees 33,148 153 33,301 Mortgage banking, net 26,626 — 26,626 Wealth management 748 36,503 37,251 Other, net 17,620 193 17,813 Securities gains (losses), net ( 182,792 ) — ( 182,792 ) Internal allocations ( 377 ) 377 — Noninterest income (loss) ( 60,732 ) 37,313 ( 23,419 ) Salaries and employee benefits 243,930 22,309 266,239 Services and fees 98,833 2,757 101,590 Other segment expenses (1) 116,080 1,781 117,861 Internal allocations ( 5,897 ) 5,897 — Noninterest expense 452,946 32,744 485,690 Income from continuing operations before income taxes 23,683 10,374 34,057 Income taxes from continuing operations ( 13,726 ) 2,573 ( 11,153 ) Consolidated income from continuing operations $ 37,409 $ 7,801 $ 45,210 Selected Financial Information Total assets from continuing operations $ 17,938,268 $ 214,154 $ 18,152,422 Depreciation and amortization from continuing operations $ 37,599 $ 250 $ 37,849 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense. Year Ended December 31, 2023 General Banking Wealth Management Consolidated Interest income $ 869,143 $ 9,689 $ 878,832 Interest expense 324,470 1,484 325,954 Funds transfer pricing, net 2,326 ( 2,326 ) — Net interest income 546,999 5,879 552,878 PCL 26,716 ( 2,135 ) 24,581 Net interest income after PCL 520,283 8,014 528,297 Service charges on deposit accounts 43,329 87 43,416 Bank card and other fees 33,382 57 33,439 Mortgage banking, net 26,216 — 26,216 Wealth management 838 34,254 35,092 Other, net 10,069 162 10,231 Securities gains (losses), net 39 — 39 Internal allocations ( 376 ) 376 — Noninterest income (loss) 113,497 34,936 148,433 Salaries and employee benefits 247,014 21,256 268,270 Services and fees 104,432 3,373 107,805 Other segment expenses (1) 117,757 1,864 119,621 Internal allocations ( 5,846 ) 5,846 — Noninterest expense 463,357 32,339 495,696 Income from continuing operations before income taxes 170,423 10,611 181,034 Income taxes from continuing operations 25,091 2,653 27,744 Consolidated income from continuing operations $ 145,332 $ 7,958 $ 153,290 Selected Financial Information Total assets from continuing operations $ 18,469,213 $ 185,342 $ 18,654,555 Depreciation and amortization from continuing operations $ 34,924 $ 261 $ 35,185 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense. Year Ended December 31, 2022 General Banking Wealth Management Consolidated Interest income $ 534,531 $ 7,302 $ 541,833 Interest expense 47,044 81 47,125 Funds transfer pricing, net 1,900 ( 1,900 ) — Net interest income 489,387 5,321 494,708 PCL 22,913 ( 21 ) 22,892 Net interest income after PCL 466,474 5,342 471,816 Service charges on deposit accounts 42,073 84 42,157 Bank card and other fees 36,058 47 36,105 Mortgage banking, net 28,306 — 28,306 Wealth management 639 34,374 35,013 Other, net 9,313 528 9,841 Securities gains (losses), net — — — Internal allocations ( 39 ) 39 — Noninterest income (loss) 116,350 35,072 151,422 Salaries and employee benefits 232,720 21,527 254,247 Services and fees 100,397 3,496 103,893 Other segment expenses (1) 204,097 1,896 205,993 Internal allocations ( 5,954 ) 5,954 — Noninterest expense 531,260 32,873 564,133 Income from continuing operations before income taxes 51,564 7,541 59,105 Income taxes from continuing operations ( 3,683 ) 1,870 ( 1,813 ) Consolidated income from continuing operations $ 55,247 $ 5,671 $ 60,918 Selected Financial Information Total assets from continuing operations $ 17,724,953 $ 214,313 $ 17,939,266 Depreciation and amortization from continuing operations $ 38,909 $ 288 $ 39,197 (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.

Parent Company Only Financial_2

Parent Company Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Parent Only Financial Statements	Condensed Balance Sheets December 31, 2024 2023 Assets: Investment in banks $ 2,062,555 $ 1,770,392 Other assets 86,907 77,901 Total Assets $ 2,149,462 $ 1,848,293 Liabilities and Shareholders' Equity: Accrued expense $ 1,577 $ 1,108 Subordinated notes 123,702 123,482 Junior subordinated debt securities 61,856 61,856 Shareholders' equity 1,962,327 1,661,847 Total Liabilities and Shareholders' Equity $ 2,149,462 $ 1,848,293 Condensed Statements of Income Years Ended December 31, 2024 2023 2022 Revenue: Dividends received from banks $ 82,536 $ 67,189 $ 89,733 Earnings of subsidiaries over distributions 148,884 106,388 ( 11,269 ) Other income 165 163 94 Total Revenue 231,585 173,740 78,558 Expense: Other expense 8,576 8,251 6,671 Total Expense 8,576 8,251 6,671 Net Income $ 223,009 $ 165,489 $ 71,887 Condensed Statements of Cash Flows Years Ended December 31, 2024 2023 2022 Operating Activities: Net income $ 223,009 $ 165,489 $ 71,887 Adjustments to reconcile net income to net cash provided Net change in investment in subsidiaries ( 148,884 ) ( 106,388 ) 11,269 Other ( 835 ) ( 797 ) ( 1,550 ) Net cash from operating activities 73,290 58,304 81,606 Financing Activities: Common stock dividends ( 56,790 ) ( 56,653 ) ( 56,679 ) Repurchase and retirement of common stock ( 7,499 ) — ( 24,604 ) Net cash from financing activities ( 64,289 ) ( 56,653 ) ( 81,283 ) Net change in cash and cash equivalents 9,001 1,651 323 Cash and cash equivalents at beginning of year 77,511 75,860 75,537 Cash and cash equivalents at end of year $ 86,512 $ 77,511 $ 75,860

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]
Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain (Loss) on Disposition of Business
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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Insurance commissions	$ 27,728	$ 57,569	$ 53,721
Gain on sale of discontinued operations, net	228,272	0	0
Other, net	527	956	1
Total noninterest income	256,527	58,525	53,722
Salaries and employee benefits	16,263	36,395	33,193
Services and fees	704	1,673	1,576
Net occupancy - premises	269	975	1,278
Equipment expense	93	298	303
Other expense	2,046	2,882	2,730
Total noninterest expense	19,375	42,223	39,080
Income from discontinued operations before income taxes	237,152	16,302	14,642
Income taxes from discontinued operations	59,353	4,103	3,673
Income from discontinued operations	$ 177,799	$ 12,199	$ 10,969

Discontinued Operations - Sum_2

Discontinued Operations - Summary of Assets and Liabilities of Discontinued Operations on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 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

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) Fee RevenueCategory	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Percentage of outstanding principal to be repurchased under GNMA optional repurchase program	100%
Number of days to pass to be classified as past due LHFI	30 days
Finite-lived intangible assets, average useful life	20 years
Securities with limited marketability	$ 44,900,000	$ 54,400,000
Other-than-temporary impairment of investment in member bank stock	$ 0	0	$ 0
Number of types of interchange fees | Fee	2
Other real estate sales, net (losses) gains	$ (1,104,000)	$ (145,000)	$ (1,006,000)
Number of trust management revenue categories | RevenueCategory	4
Time period between service obligation completed and payment received from trust customer	30 days
Credit Card Loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due loans are to be charged-off	180 days
Commercial Credits [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due for loan to be classified as nonaccrual	90 days
Non-Business Purpose Credits [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due for loan to be classified as nonaccrual	120 days
Number of days past due loans are to be charged-off	120 days
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days mortgage LHFS are retained on balance sheet	30 days
Minimum [Member] | Furniture and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days mortgage LHFS are retained on balance sheet	45 days
Maximum [Member] | Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	39 years
Maximum [Member] | Furniture and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	10 years
Maximum [Member] | 1-4 Family Residential Real Estate [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due loans are to be charged-off	180 days
ASU 2016-13 [Member] | Securities Available for Sale [Member]
Summary Of Significant Accounting Policies [Line Items]
Current expected credit loss	$ 0

Significant Accounting Polici_5

Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of cash flows specific transaction amounts [Abstract]
Income taxes paid	$ 21,472	$ 38,803	$ 2,701
Interest paid on deposits and borrowings	385,779	306,568	45,275
Noncash transfers from loans to other real estate	6,782	7,237	1,533
Securities transferred from available for sale to held to maturity	0	0	674,092
Investment in tax credit partnership not funded	4,839	3,202	18,891
Operating right-of-use assets resulting from lease liabilities	$ 1,831	$ 7,303	$ 6,912

Significant Accounting Polici_6

Significant Accounting Policies - Weighted-Average Shares Used to Calculate Basic and Diluted EPS (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share (EPS) [Abstract]
Basic shares	61,158	61,054	61,242
Dilutive shares	226	177	190
Diluted shares	61,384	61,231	61,432

Significant Accounting Polici_7

Significant Accounting Policies - Weighted-Average Antidilutive Stock Awards Excluded from Determining Diluted EPS (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Weighted-average antidilutive stock awards (in shares)	2,000	23,000	0

Cash and Due from Banks - Addit

Cash and Due from Banks - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Federal reserve tax rate, percent	0%

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	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Securities Available for Sale, Amortized Cost	$ 1,719,537	$ 1,959,007
Securities Available for Sale, Gross Unrealized Gains	2,988	37
Securities Available for Sale, Gross Unrealized (Losses)	(29,991)	(196,166)
Securities Available for Sale, Estimated Fair Value	1,692,534	1,762,878
Securities Held to Maturity, Amortized Cost	1,335,385	1,426,279
Securities Held to Maturity, Gross Unrealized Gains	98	51
Securities Held to Maturity, Gross Unrealized (Losses)	(76,376)	(70,826)
Securities Held to Maturity, Estimated Fair Value	1,259,107	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	203,524	396,179
Securities Available for Sale, Gross Unrealized Gains	548	0
Securities Available for Sale, Gross Unrealized (Losses)	(1,403)	(23,811)
Securities Available for Sale, Estimated Fair Value	202,669	372,368
Securities Held to Maturity, Amortized Cost	29,842	29,068
Securities Held to Maturity, Gross Unrealized Gains	1	0
Securities Held to Maturity, Gross Unrealized (Losses)	(522)	(26)
Securities Held to Maturity, Estimated Fair Value	29,321	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	41,194	6,207
Securities Available for Sale, Gross Unrealized Gains	0	1
Securities Available for Sale, Gross Unrealized (Losses)	(2,387)	(416)
Securities Available for Sale, Estimated Fair Value	38,807	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
Securities Available for Sale, Estimated Fair Value		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	31,365	25,744
Securities Available for Sale, Gross Unrealized Gains	3	4
Securities Available for Sale, Gross Unrealized (Losses)	(2,957)	(2,613)
Securities Available for Sale, Estimated Fair Value	28,411	23,135
Securities Held to Maturity, Amortized Cost	16,218	13,005
Securities Held to Maturity, Gross Unrealized Gains	0	0
Securities Held to Maturity, Gross Unrealized (Losses)	(844)	(497)
Securities Held to Maturity, Estimated Fair Value	15,374	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	1,091,122	1,338,256
Securities Available for Sale, Gross Unrealized Gains	1,610	32
Securities Available for Sale, Gross Unrealized (Losses)	(22,194)	(161,490)
Securities Available for Sale, Estimated Fair Value	1,070,538	1,176,798
Securities Held to Maturity, Amortized Cost	423,372	469,593
Securities Held to Maturity, Gross Unrealized Gains	94	0
Securities Held to Maturity, Gross Unrealized (Losses)	(23,853)	(18,205)
Securities Held to Maturity, Estimated Fair Value	399,613	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)
Securities Available for Sale, Estimated Fair Value	0	86,074
Securities Held to Maturity, Amortized Cost	123,685	154,466
Securities Held to Maturity, Gross Unrealized Gains	0	0
Securities Held to Maturity, Gross Unrealized (Losses)	(8,004)	(10,113)
Securities Held to Maturity, Estimated Fair Value	115,681	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	352,332	100,545
Securities Available for Sale, Gross Unrealized Gains	827	0
Securities Available for Sale, Gross Unrealized (Losses)	(1,050)	(1,834)
Securities Available for Sale, Estimated Fair Value	352,109	98,711
Securities Held to Maturity, Amortized Cost	742,268	759,807
Securities Held to Maturity, Gross Unrealized Gains	3	51
Securities Held to Maturity, Gross Unrealized (Losses)	(43,153)	(41,985)
Securities Held to Maturity, Estimated Fair Value	$ 699,118	$ 717,873

Securities Available for Sale_4

Securities Available for Sale and Held to Maturity - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2024	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		$ 46,600,000	$ 57,600,000
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		1,335,385,000	1,426,279,000
Securities available for sale		1,692,534,000	1,762,878,000
Available for sale securities, average yield	4.85%
Gross realized losses	$ 182,800,000	182,792,000	8,000	0
Net unamortized, unrealized loss on transfer of securities, net of tax	(137,100,000)
Purchases of securities available for sale	1,378,000,000	1,555,065,000	0	$ 230,527,000
Pledged to collateralize public deposits and securities sold under repurchase agreements and for other purposes as permitted by law		1,910,000,000	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		5,000,000	3,700,000
Securities Held to Maturity [Member]
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable		2,400,000	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	Dec. 31, 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	$ 1,335,385	$ 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	1,335,385	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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available For Sale and Held to Maturity Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 1,324,604	$ 349,545
Gross Unrealized (Losses), Less than 12 Months	(18,989)	(3,485)
Estimated Fair Value, 12 Months or More	1,148,537	2,758,879
Gross Unrealized (Losses), 12 Months or More	(87,378)	(263,507)
Estimated Fair Value, Total	2,473,141	3,108,424
Gross Unrealized (Losses), Total	(106,367)	(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	123,277	29,042
Gross Unrealized (Losses), Less than 12 Months	(1,925)	(26)
Estimated Fair Value, 12 Months or More	0	372,368
Gross Unrealized (Losses), 12 Months or More	0	(23,811)
Estimated Fair Value, Total	123,277	401,410
Gross Unrealized (Losses), Total	(1,925)	(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	38,807	0
Gross Unrealized (Losses), Less than 12 Months	(2,387)	0
Estimated Fair Value, 12 Months or More	0	5,791
Gross Unrealized (Losses), 12 Months or More	0	(416)
Estimated Fair Value, Total	38,807	5,791
Gross Unrealized (Losses), Total	(2,387)	(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	15,802	9,381
Gross Unrealized (Losses), Less than 12 Months	(293)	(172)
Estimated Fair Value, 12 Months or More	27,803	25,967
Gross Unrealized (Losses), 12 Months or More	(3,508)	(2,938)
Estimated Fair Value, Total	43,605	35,348
Gross Unrealized (Losses), Total	(3,801)	(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	981,747	309,466
Gross Unrealized (Losses), Less than 12 Months	(13,848)	(3,274)
Estimated Fair Value, 12 Months or More	237,487	1,311,865
Gross Unrealized (Losses), 12 Months or More	(32,199)	(176,421)
Estimated Fair Value, Total	1,219,234	1,621,331
Gross Unrealized (Losses), Total	(46,047)	(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	115,681	230,368
Gross Unrealized (Losses), 12 Months or More	(8,004)	(16,115)
Estimated Fair Value, Total	115,681	230,368
Gross Unrealized (Losses), Total	(8,004)	(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	164,971	1,656
Gross Unrealized (Losses), Less than 12 Months	(536)	(13)
Estimated Fair Value, 12 Months or More	767,566	812,520
Gross Unrealized (Losses), 12 Months or More	(43,667)	(43,806)
Estimated Fair Value, Total	932,537	814,176
Gross Unrealized (Losses), Total	$ (44,203)	$ (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	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds from calls and sales of securities		$ 1,378,272	$ 4,796	$ 0
Gross realized gains		0	47	0
Gross realized losses	$ (182,800)	$ (182,792)	$ (8)	$ 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	Dec. 31, 2024	Dec. 31, 2023
Securities Available for Sale, Amortized Cost [Abstract]
Due in one year or less	$ 45,777
Due after one year through five years	62,388
Due after five years through ten years	136,553
Total amortized cost, before mortgage-backed securities	244,718
Mortgage-backed securities	1,474,819
Securities Available for Sale, Amortized Cost	1,719,537	$ 1,959,007
Securities Available for Sale, Estimated Fair Value [Abstract]
Due in one year or less	45,976
Due after one year through five years	62,737
Due after five years through ten years	132,763
Total fair value, before mortgage-backed securities	241,476
Mortgage-backed securities	1,451,058
Total	1,692,534	1,762,878
Securities Held to Maturity, Amortized Cost [Abstract]
Due in one year or less	0
Due after one year through five years	29,842
Due after five years through ten years	0
Total amortized cost, before mortgage-backed securities	29,842
Mortgage-backed securities	1,305,543
Securities Held to Maturity, Amortized Cost	1,335,385	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	29,321
Due after five years through ten years	0
Total fair value, before mortgage-backed securities	29,321
Mortgage-backed securities	1,229,786
Total	$ 1,259,107	$ 1,355,504

LHFI and ACL, LHFI - Loan Portf

LHFI and ACL, LHFI - Loan Portfolio Held for Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loan Portfolio [Abstract]
Total LHFI	$ 13,089,942	$ 12,950,524
Less ACL, LHFI	160,270	139,367	$ 120,214	$ 99,457
Net LHFI	12,929,672	12,811,157
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	587,244	642,886
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	650,550	622,397
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	2,298,993	2,282,318
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	1,633,830	1,312,551
Other Construction [Member] | Other Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	829,904	867,793
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Loan Portfolio [Abstract]
Total LHFI	3,533,282	3,489,434
Less ACL, LHFI	37,896	24,043	19,488
Commercial and Industrial Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	1,840,722	1,922,910
Less ACL, LHFI	27,020	26,638	23,140
Consumer Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	156,569	165,734
Less ACL, LHFI	5,141	5,794	5,792
State and Other Political Subdivision Loans [Member]
Loan Portfolio [Abstract]
Total LHFI	969,836	1,088,466
Less ACL, LHFI	1,250	646	885
Other Commercial Loans and Leases [Member]
Loan Portfolio [Abstract]
Total LHFI	589,012	556,035
Less ACL, LHFI	$ 6,247	$ 7,072	$ 4,647

LHFI and ACL, LHFI - Additional

LHFI and ACL, LHFI - Additional Information (Details 1) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) Region	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accrued interest receivable	$ 64.7	$ 71
Maximum concentration of loan as a percentage of total LHFI	10%
Key market regions | Region	6
Loans and Leases Receivable, Related Parties	$ 33.1	$ 41.1
New loan advances to related party	235.9
Loan repayment by related party	243.9
Decrease in loans due to changes in executive officers and directors	$ 0

LHFI and ACL, LHFI - Schedule o

LHFI and ACL, LHFI - Schedule of Amortized Cost Basis of Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	$ 4,400	$ 27,092
Total Nonaccrual	80,109	100,008
Loans Past Due 90 Days or More Still Accruing	4,092	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	366	2,642
Loans Past Due 90 Days or More Still Accruing	159
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	521	946
Total Nonaccrual	7,275	6,518
Loans Past Due 90 Days or More Still Accruing	266	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	426	20,812
Total Nonaccrual	13,061	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	1,904
Total Nonaccrual	1,984	158
Loans Past Due 90 Days or More Still Accruing		106
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	1,533	3,235
Total Nonaccrual	31,583	43,815
Loans Past Due 90 Days or More Still Accruing	3,253	3,740
Commercial and Industrial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual With No ACL	16	79
Total Nonaccrual	24,525	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	236	243
Loans Past Due 90 Days or More Still Accruing	414	628
Other Commercial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Nonaccrual		1,206
Other Commercial Loans and Leases Financing Receivable [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Nonaccrual	$ 1,079
Other construction [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Nonaccrual		$ 62

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	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	$ 13,089,942	$ 12,950,524
Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	30,456	40,995
Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	23,279	13,898
Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	37,528	29,322
Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	91,263	84,215
Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	12,998,679	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	587,244	642,886
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	199	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	0	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	324	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	523	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	586,721	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	650,550	622,397
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	5,656	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	1,821	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	3,223	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	10,700	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	639,850	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	2,298,993	2,282,318
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	17,898	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	7,111	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	21,524	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	46,533	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	2,252,460	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	3,533,282	3,489,434
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,488	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	380	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	3,111	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	4,979	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	3,528,303	3,486,113
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,633,830	1,312,551
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,979	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	2,007	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	1,631,823	1,312,218
Commercial and Industrial Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,840,722	1,922,910
Commercial and Industrial Loans [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,114	11,881
Commercial and Industrial Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	13,300	484
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	8,835	499
Commercial and Industrial Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	23,249	12,864
Commercial and Industrial Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,817,473	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	829,904	867,793
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	0	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	0	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	829,904	867,731
Consumer Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	156,569	165,734
Consumer Loans [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	1,930	2,112
Consumer Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	600	772
Consumer Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	414	647
Consumer Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	2,944	3,531
Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	153,625	162,203
State and Other Political Subdivision Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	969,836	1,088,466
State and Other Political Subdivision Loans [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	24	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	24	152
State and Other Political Subdivision Loans [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	969,812	1,088,314
Other Commercial Loans and Leases [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	589,012	556,035
Other Commercial Loans and Leases [Member] | Past Due 30 to 59 Days [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	168	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	67	58
Other Commercial Loans and Leases [Member] | Past Due 90 Days or More [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	69	0
Other Commercial Loans and Leases [Member] | Financial Asset, Past Due [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	304	1,305
Other Commercial Loans and Leases [Member] | Current Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total LHFI	$ 588,708	$ 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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Modifications [Line Items]
Amortized Cost Basis	$ 3,585	$ 2,379
Pre-Modification Outstanding Recorded Investment	6,207	358
Post-Modification Outstanding Recorded Investment	$ 9,792	$ 2,737
% of Total Class of Loan	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	$ 3,456	$ 805
Post-Modification Outstanding Recorded Investment	$ 3,456	$ 805
% of Total Class of Loan	0.53%	0.13%
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis		$ 359
Post-Modification Outstanding Recorded Investment		$ 359
% 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	$ 129	$ 1,148
Post-Modification Outstanding Recorded Investment	$ 129	$ 1,148
% of Total Class of Loan	0.01%	0.05%
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Pre-Modification Outstanding Recorded Investment	$ 6,207	$ 242
Post-Modification Outstanding Recorded Investment	$ 6,207	$ 242
% of Total Class of Loan	0.34%	0.01%
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Amortized Cost Basis		$ 36
Post-Modification Outstanding Recorded Investment		$ 36
% 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]	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable, Modified [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, Modified [Line Items]
Term Extension - Financial Effect	Modified nine loans to amortize over weighted average 35 months	Extended amortization with term adjusted by weighted-average 3.4 years
Weighted average amortization period		3 years 4 months 24 days
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable, Modified [Line Items]
Term Extension - Financial Effect	Modified five loans and twenty-five lines of credit 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, Modified [Line Items]
Term Extension - Payment Concessions	Thirty-four month principal payment deferral	Six month payment deferrals
Other Commercial Loans and Leases [Member]
Financing Receivable, Modified [Line Items]
Term Extension - Financial Effect		One loan renewed and extended maturity by seven months
Term Extension - Payment Concessions		Six month payment deferrals
Consumer Loans [Member]
Financing Receivable, Modified [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 - Troubled_2

LHFI and ACL, LHFI - Troubled Debt Restructuring Subsequently Defaulted (Details) - Troubled Debt Restructurings [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Recorded Investment	$ 6,200
Term extension balance	$ 70
Other Commercial Loans and Leases [Member]
Financing Receivable Modifications [Line Items]
Recorded Investment		$ 116

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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Modifications [Line Items]
Total	$ 9,792	$ 2,737
30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	739	371
Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	128	17
Past Due 90 Days or More [Member]
Financing Receivable Modifications [Line Items]
Total	6,257
Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	7,124	388
Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	2,668	2,349
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	3,456	805
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	739	290
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total	128	17
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]
Financing Receivable Modifications [Line Items]
Total	50
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	917	307
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	2,539	498
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total		359
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 [Member]
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		359
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]
Financing Receivable Modifications [Line Items]
Total	129	1,148
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	64
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
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	0	64
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	129	1,084
Commercial and Industrial Loans [Member]
Financing Receivable Modifications [Line Items]
Total	6,207	242
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
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Modifications [Line Items]
Total	6,207
Commercial and Industrial Loans [Member] | Past Due [Member]
Financing Receivable Modifications [Line Items]
Total	6,207	0
Commercial and Industrial Loans [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total	$ 0	242
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Total		36
Consumer Loans [Member] | 30 Days or More Past Due [Member]
Financing Receivable Modifications [Line Items]
Total		17
Consumer Loans [Member] | Past Due 60 to 89 Days [Member]
Financing Receivable Modifications [Line Items]
Total		0
Consumer Loans [Member] | Past Due [Member]
Financing Receivable Modifications [Line Items]
Total		17
Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total		19
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 [Member]
Financing Receivable Modifications [Line Items]
Total		0
Other Commercial Loans and Leases [Member] | Current Loans [Member]
Financing Receivable Modifications [Line Items]
Total		$ 147

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	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	$ 37,140	$ 49,082
Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	13,741	27,051
Vehicles [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,818	41
Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	21,581	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	521	946
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	521	946
Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	9,783	20,812
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	9,783	20,812
Other Real Estate Secured [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,904
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,904
Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,533	3,235
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	1,533	3,235
Commercial and Industrial Loans [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	22,503	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	1,818	41
Commercial and Industrial Loans [Member] | Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	20,685	21,023
Other Commercial Loans and Leases [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	896	967
Other Commercial Loans and Leases [Member] | Miscellaneous [Member]
Financing Receivable Impaired [Line Items]
Collateral-Dependent Loans	$ 896	$ 967

LHFI and ACL, LHFI - Addition_2

LHFI and ACL, LHFI - Additional Information (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) KeyRatio	Dec. 31, 2023 USD ($)
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
LHFS past due 90 days or more	71,300	$ 51,200
Exposure for modified commercial accrual loans deemed to be reviewed on individual basis	500
Minimum [Member]
Financing Receivable [Abstract]
Credit amount used as baseline in evaluating loan policy	$ 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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	$ 2,425,302	$ 2,557,360
Term Loans by Origination Year, Before Latest Fiscal Year	2,029,555	3,821,836
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	3,411,388	2,060,977
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	1,584,914	1,267,991
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	996,108	662,502
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,231,936	1,121,424
Financing Receivable, Revolving Loans	1,410,739	1,458,434
Total LHFI	13,089,942	12,950,524
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(6,324)	(6,345)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(2,325)	(2,951)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(13,873)	(4,601)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(6,094)	(313)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(295)	(353)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,658)	(417)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,380)	(2,535)
Total LHFI, Current Period Gross Charge-Offs	(34,949)	(17,515)
Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	37,528	29,322
Commercial and Industrial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	1,840,722	1,922,910
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	8,835	499
State and Other Political Subdivision Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	969,836	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	589,012	556,035
Other Commercial Loans and Leases [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	69	0
Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	156,569	165,734
Consumer Loans [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	414	647
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	587,244	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	650,550	622,397
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	1,633,830	1,312,551
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	3,533,282	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	3,111	727
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total LHFI	829,904	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	2,298,993	2,282,318
Commercial LHFI [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	2,036,099	2,158,477
Term Loans by Origination Year, Before Latest Fiscal Year	1,733,064	2,846,360
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	2,550,038	1,503,578
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	1,103,244	1,071,603
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	825,912	555,406
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	898,822	821,512
Financing Receivable, Revolving Loans	897,242	973,511
Total LHFI	10,044,421	9,930,447
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(366)	(143)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(1,225)	(1,362)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(3,260)	(4,208)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(5,780)	(164)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(158)	(342)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,220)	(252)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(315)	(7)
Total LHFI, Current Period Gross Charge-Offs	(14,324)	(6,478)
Commercial LHFI [Member] | Commercial and Industrial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	512,988	515,103
Term Loans by Origination Year, Before Latest Fiscal Year	367,401	501,808
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	285,674	175,718
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	103,569	93,985
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	46,443	32,026
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	40,363	45,077
Financing Receivable, Revolving Loans	484,284	559,193
Total LHFI	1,840,722	1,922,910
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(341)	(42)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(1,211)	(1,071)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(640)	(700)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(3,251)	(138)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(158)	(95)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(3,132)	(108)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(315)	(7)
Total LHFI, Current Period Gross Charge-Offs	(9,048)	(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	505,557	497,730
Term Loans by Origination Year, Before Latest Fiscal Year	365,724	474,737
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	231,875	158,659
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	98,318	80,646
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	45,551	31,876
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	27,456	44,972
Financing Receivable, Revolving Loans	462,740	537,527
Total LHFI	1,737,221	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	564	10,141
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	14,066	3,149
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	15	1,381
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		110
Financing Receivable, Revolving Loans	13,836	126
Total LHFI	28,481	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	7,204	4,797
Term Loans by Origination Year, Before Latest Fiscal Year	1,113	16,872
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	39,698	13,909
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,091	11,958
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	891	40
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	12,905	80
Financing Receivable, Revolving Loans	7,598	21,528
Total LHFI	74,500	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		58
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	35	1
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	145
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2	25
Financing Receivable, Revolving Loans	110	12
Total LHFI	520	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	156,130	152,157
Term Loans by Origination Year, Before Latest Fiscal Year	82,532	247,034
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	212,528	174,812
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	135,251	99,786
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	78,543	32,118
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	302,709	377,225
Financing Receivable, Revolving Loans	2,143	5,334
Total LHFI	969,836	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	156,130	152,157
Term Loans by Origination Year, Before Latest Fiscal Year	82,532	247,034
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	212,528	174,812
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	135,251	99,786
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	78,543	32,118
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	302,709	377,225
Financing Receivable, Revolving Loans	2,143	5,334
Total LHFI	969,836	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	157,683	211,508
Term Loans by Origination Year, Before Latest Fiscal Year	148,781	49,158
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	7,609	30,113
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	9,860	21,585
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	15,606	32,837
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	45,227	8,488
Financing Receivable, Revolving Loans	204,246	202,346
Total LHFI	589,012	556,035
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(25)	(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	(38)
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	(32)
Total LHFI, Current Period Gross Charge-Offs	(95)	(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	157,619	211,402
Term Loans by Origination Year, Before Latest Fiscal Year	148,099	48,947
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	7,371	30,071
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	9,800	21,377
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	15,606	32,837
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	45,227	8,468
Financing Receivable, Revolving Loans	203,345	201,339
Total LHFI	587,067	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	116
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	48	208
Financing Receivable, Revolving Loans		20
Total LHFI	164	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	55	106
Term Loans by Origination Year, Before Latest Fiscal Year	682	211
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	116	42
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	12
Financing Receivable, Revolving Loans	901	987
Total LHFI	1,766	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, Current Fiscal Year	9
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	6
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		20
Total LHFI	15	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	326,957	360,419
Term Loans by Origination Year, Before Latest Fiscal Year	83,565	99,078
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	33,806	36,967
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	24,107	10,610
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	8,145	2,036
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,587	2,006
Financing Receivable, Revolving Loans	44,647	52,351
Total LHFI	522,814	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	324,775	359,813
Term Loans by Origination Year, Before Latest Fiscal Year	83,503	98,742
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	33,580	35,095
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	23,124	10,591
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	8,145	2,036
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,587	1,961
Financing Receivable, Revolving Loans	42,469	52,351
Total LHFI	517,183	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	2,165
Term Loans by Origination Year, Two Years Before Latest Fiscal Year		360
Financing Receivable, Revolving Loans	2,002
Total LHFI	4,167	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	17	606
Term Loans by Origination Year, Before Latest Fiscal Year	62	336
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	226	1,512
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	983	19
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		21
Financing Receivable, Revolving Loans	176
Total LHFI	1,464	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	31,165	33,292
Term Loans by Origination Year, Before Latest Fiscal Year	24,714	31,467
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	23,248	29,364
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	24,450	14,341
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	11,635	8,164
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,297	3,128
Financing Receivable, Revolving Loans	7,769	10,175
Total LHFI	125,278	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	(16)	(6)
Total LHFI, Current Period Gross Charge-Offs	(16)	(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	31,013	33,072
Term Loans by Origination Year, Before Latest Fiscal Year	24,339	30,760
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	22,693	29,159
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	24,090	14,309
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	11,635	8,084
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	2,106	2,822
Financing Receivable, Revolving Loans	7,742	10,077
Total LHFI	123,618	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	32	10
Total LHFI	59	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	125	220
Term Loans by Origination Year, Before Latest Fiscal Year	375	625
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	555	157
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	328	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	191	306
Financing Receivable, Revolving Loans	27	98
Total LHFI	1,601	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	166,924	194,309
Term Loans by Origination Year, Before Latest Fiscal Year	165,277	463,340
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	768,980	332,818
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	317,516	210,047
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	138,038	91,905
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	68,897	11,119
Financing Receivable, Revolving Loans	7,941	8,880
Total LHFI	1,633,573	1,312,418
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(89)
Total LHFI, Current Period Gross Charge-Offs	(89)
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	152,314	194,141
Term Loans by Origination Year, Before Latest Fiscal Year	157,827	447,200
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	726,814	332,818
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	233,861	209,757
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	137,786	56,024
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	43,478	11,080
Financing Receivable, Revolving Loans	7,434	8,880
Total LHFI	1,459,514	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	7,450	2,076
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	15,481
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	41,019
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		35,881
Financing Receivable, Revolving Loans	263
Total LHFI	64,213	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	14,610
Term Loans by Origination Year, Before Latest Fiscal Year		14,064
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	26,685
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	42,636	290
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	252
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	25,419	39
Financing Receivable, Revolving Loans	244
Total LHFI	109,846	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
Total LHFI		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	569,031	511,951
Term Loans by Origination Year, Before Latest Fiscal Year	448,480	936,413
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	974,290	573,903
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	467,844	607,187
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	508,083	356,320
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	437,742	374,463
Financing Receivable, Revolving Loans	127,812	129,190
Total LHFI	3,533,282	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	(2,529)
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	(2,545)	(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	542,747	501,327
Term Loans by Origination Year, Before Latest Fiscal Year	441,159	919,519
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	880,511	526,412
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	429,929	596,240
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	464,504	323,687
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	392,802	369,250
Financing Receivable, Revolving Loans	127,812	129,142
Total LHFI	3,279,464	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	16,266	4,271
Term Loans by Origination Year, Before Latest Fiscal Year		14,930
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	52,093
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		138
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	17,978	23,966
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3,335
Total LHFI	89,672	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	10,007	6,332
Term Loans by Origination Year, Before Latest Fiscal Year	7,321	1,964
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	41,686	47,491
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	37,915	10,809
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	25,601	8,614
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	41,598	5,200
Financing Receivable, Revolving Loans		48
Total LHFI	164,128	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	11	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	7	13
Total LHFI	18	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	115,221	179,738
Term Loans by Origination Year, Before Latest Fiscal Year	412,314	518,062
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	243,903	149,883
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	20,647	14,062
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	19,419
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		6
Financing Receivable, Revolving Loans	18,400	6,042
Total LHFI	829,904	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, Before Latest Fiscal Year	(14)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(2,493)	(3,392)
Total LHFI, Current Period Gross Charge-Offs	(2,507)	(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	115,221	179,676
Term Loans by Origination Year, Before Latest Fiscal Year	410,064	518,062
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	201,526	149,883
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	20,647	14,062
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year		6
Financing Receivable, Revolving Loans	18,400	6,042
Total LHFI	765,858	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, Before Latest Fiscal Year	2,250
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	24,557
Total LHFI	26,807
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		62
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	17,820
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	19,419
Total LHFI	37,239	62
Consumer LHFI [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	389,203	398,883
Term Loans by Origination Year, Before Latest Fiscal Year	296,491	975,476
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	861,350	557,399
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	481,670	196,388
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	170,196	107,096
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	333,114	299,912
Financing Receivable, Revolving Loans	513,497	484,923
Total LHFI	3,045,521	3,020,077
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(5,958)	(6,202)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(1,100)	(1,589)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(10,613)	(393)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(314)	(149)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(137)	(11)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(438)	(165)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,065)	(2,528)
Total LHFI, Current Period Gross Charge-Offs	(20,625)	(11,037)
Consumer LHFI [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	56,815	60,878
Term Loans by Origination Year, Before Latest Fiscal Year	22,738	33,351
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	13,325	10,919
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4,723	2,665
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,207	922
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	118	299
Financing Receivable, Revolving Loans	57,643	56,700
Total LHFI	156,569	165,734
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(5,929)	(6,138)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(785)	(559)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(470)	(167)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(131)	(43)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(100)	(1)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(337)	(1)
Financing Receivable, Revolving, Current Period Gross Charge-Offs	(2,065)	(2,381)
Total LHFI, Current Period Gross Charge-Offs	(9,817)	(9,290)
Consumer LHFI [Member] | Consumer Loans [Member] | Current [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	55,908	59,496
Term Loans by Origination Year, Before Latest Fiscal Year	22,226	32,767
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	12,922	10,698
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4,654	2,604
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,188	917
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	105	294
Financing Receivable, Revolving Loans	56,423	55,321
Total LHFI	153,426	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	844	1,274
Term Loans by Origination Year, Before Latest Fiscal Year	396	475
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	323	134
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4	34
Term Loans by Origination Year, Four Years Before Latest Fiscal Year		5
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	13	5
Financing Receivable, Revolving Loans	913	839
Total LHFI	2,493	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	38	64
Term Loans by Origination Year, Before Latest Fiscal Year	67	44
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	17	3
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4	1
Financing Receivable, Revolving Loans	288	516
Total LHFI	414	628
Consumer LHFI [Member] | Consumer Loans [Member] | Nonaccrual [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	25	44
Term Loans by Origination Year, Before Latest Fiscal Year	49	65
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	63	84
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	61	26
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	19
Financing Receivable, Revolving Loans	19	24
Total LHFI	236	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	31,569	44,912
Term Loans by Origination Year, Before Latest Fiscal Year	22,830	23,360
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	4,334	6,121
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	2,834	1,203
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	930	1,112
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,933	2,058
Financing Receivable, Revolving Loans		653
Total LHFI	64,430	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	31,478	44,912
Term Loans by Origination Year, Before Latest Fiscal Year	22,752	23,110
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	4,302	5,973
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	2,762	1,203
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	930	1,082
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,804	1,864
Financing Receivable, Revolving Loans		653
Total LHFI	64,028	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	47	250
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	11
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	106	191
Total LHFI	164	471
Consumer LHFI [Member] | Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member] | Past Due 90 Days or More [Member]
Financing Receivable Recorded Investment [Line Items]
Term Loans by Origination Year, Current Fiscal Year	91
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	68
Total LHFI	159
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, Before Latest Fiscal Year	31
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	21	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	23	3
Total LHFI	79	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	25,417	29,869
Term Loans by Origination Year, Before Latest Fiscal Year	17,245	11,774
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	6,877	5,855
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,370	4,483
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	3,757	4,364
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	10,752	8,551
Financing Receivable, Revolving Loans	455,854	427,570
Total LHFI	525,272	492,466
Term Loans by Origination Year, Current Period Gross Charge-Offs, Current Fiscal Year	(29)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Before Latest Fiscal Year	(87)	(100)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(233)	(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	(31)	(10)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(76)	(22)
Financing Receivable, Revolving, Current Period Gross Charge-Offs		(147)
Total LHFI, Current Period Gross Charge-Offs	(496)	(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	24,756	29,636
Term Loans by Origination Year, Before Latest Fiscal Year	17,202	11,366
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	6,733	5,733
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,260	4,471
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	3,651	4,313
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	9,563	7,674
Financing Receivable, Revolving Loans	445,598	417,383
Total LHFI	512,763	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	569	225
Term Loans by Origination Year, Before Latest Fiscal Year	38	68
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	67	74
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	66	4
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	3	51
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	579	220
Financing Receivable, Revolving Loans	4,524	4,292
Total LHFI	5,846	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	21
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	17	41
Financing Receivable, Revolving Loans	219	934
Total LHFI	265	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	71	8
Term Loans by Origination Year, Before Latest Fiscal Year	5	76
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	69	48
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	44	8
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	103
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	593	616
Financing Receivable, Revolving Loans	5,513	4,961
Total LHFI	6,398	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	161
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		78
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	68
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	28	55
Total LHFI	257	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	161
Term Loans by Origination Year, Three Years Before Latest Fiscal Year		78
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	68
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	28	55
Total LHFI	257	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	275,241	263,224
Term Loans by Origination Year, Before Latest Fiscal Year	233,678	906,991
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	836,814	534,497
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	468,743	187,959
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	164,234	100,698
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	320,283	288,949
Total LHFI	2,298,993	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	(228)	(930)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Two Years Before Latest Fiscal Year	(9,910)	(217)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Three Years Before Latest Fiscal Year	(143)	(104)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Four Years Before Latest Fiscal Year	(6)
Term Loans by Origination Year, Current Period Gross Charge-Offs, Five or More Years Before Latest Fiscal Year	(17)	(142)
Total LHFI, Current Period Gross Charge-Offs	(10,304)	(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	274,500	258,800
Term Loans by Origination Year, Before Latest Fiscal Year	224,266	878,893
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	808,527	516,324
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	459,191	180,272
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	161,856	98,552
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	314,906	277,664
Total LHFI	2,243,246	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	169	3,370
Term Loans by Origination Year, Before Latest Fiscal Year	4,405	11,293
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	9,883	5,513
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	4,082	2,121
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	814	298
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	1,558	1,664
Total LHFI	20,911	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	4	376
Term Loans by Origination Year, Before Latest Fiscal Year	1,263	1,219
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	1,098	1,208
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	461	682
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	170
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	257	255
Total LHFI	3,253	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	568	678
Term Loans by Origination Year, Before Latest Fiscal Year	3,744	15,586
Term Loans by Origination Year, Two Years Before Latest Fiscal Year	17,306	11,452
Term Loans by Origination Year, Three Years Before Latest Fiscal Year	5,009	4,884
Term Loans by Origination Year, Four Years Before Latest Fiscal Year	1,394	1,848
Term Loans by Origination Year, Five or More Years Before Latest Fiscal Year	3,562	9,366
Total LHFI	$ 31,583	$ 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)	12 Months Ended
	Dec. 31, 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	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	$ 13,661	$ 12,403
Individually Evaluated for Credit Loss	37,140	49,082
Collectively Evaluated for Credit Loss	146,609	126,964
Collectively Evaluated for Credit Loss	13,052,802	12,901,442
Total LHFI	13,089,942	12,950,524
Total	160,270	139,367	$ 120,214	$ 99,457
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	10,518	11,436
Individually Evaluated for Credit Loss	22,503	21,102
Collectively Evaluated for Credit Loss	16,502	15,202
Collectively Evaluated for Credit Loss	1,818,219	1,901,808
Total LHFI	1,840,722	1,922,910
Total	27,020	26,638	23,140
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0
Collectively Evaluated for Credit Loss	5,141	5,794
Collectively Evaluated for Credit Loss	156,569	165,734
Total LHFI	156,569	165,734
Total	5,141	5,794	5,792
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	0	0
Individually Evaluated for Credit Loss	0	0
Collectively Evaluated for Credit Loss	1,250	646
Collectively Evaluated for Credit Loss	969,836	1,088,466
Total LHFI	969,836	1,088,466
Total	1,250	646	885
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually Evaluated for Credit Loss	892	967
Individually Evaluated for Credit Loss	896	967
Collectively Evaluated for Credit Loss	5,355	6,105
Collectively Evaluated for Credit Loss	588,116	555,068
Total LHFI	589,012	556,035
Total	6,247	7,072	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	0
Individually Evaluated for Credit Loss	0	2,020
Collectively Evaluated for Credit Loss	6,452	17,192
Collectively Evaluated for Credit Loss	587,244	640,866
Total LHFI	587,244	642,886
Total	6,452	17,192	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	521	946
Collectively Evaluated for Credit Loss	11,347	12,942
Collectively Evaluated for Credit Loss	650,029	621,451
Total LHFI	650,550	622,397
Total	11,347	12,942	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	2,251
Individually Evaluated for Credit Loss	9,783	20,812
Collectively Evaluated for Credit Loss	35,645	24,043
Collectively Evaluated for Credit Loss	3,523,499	3,468,622
Total LHFI	3,533,282	3,489,434
Total	37,896	24,043	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	1,904	0
Collectively Evaluated for Credit Loss	19,491	4,488
Collectively Evaluated for Credit Loss	1,631,926	1,312,551
Total LHFI	1,633,830	1,312,551
Total	19,491	4,488	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	0
Individually Evaluated for Credit Loss	0	0
Collectively Evaluated for Credit Loss	13,297	5,758
Collectively Evaluated for Credit Loss	829,904	867,793
Total LHFI	829,904	867,793
Total	13,297	5,758	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	1,533	3,235
Collectively Evaluated for Credit Loss	32,129	34,794
Collectively Evaluated for Credit Loss	2,297,460	2,279,083
Total LHFI	2,298,993	2,282,318
Total	$ 32,129	$ 34,794	$ 21,185

LHFI and ACL, LHFI - Change in

LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 139,367	$ 120,214	$ 99,457
Loans charged-off	(26,316)	(17,515)	(11,332)
Loans charged-off	(34,949)	(17,515)
Recoveries	9,932	9,306	10,412
Net (charge-offs) recoveries	(25,017)	(8,209)	(920)
PCL, LHFI	45,920	27,362
Balance at end of period	160,270	139,367	120,214
Loans Held for Investment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
PCL, LHFI	37,287	27,362	21,677
1-4 Family Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans charged-off	(8,633)	0	0
PCL, LHFI	8,633	0	0
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	26,638	23,140
Loans charged-off	(9,048)	(2,161)
Recoveries	963	1,066
PCL, LHFI	8,467	4,593
Balance at end of period	27,020	26,638	23,140
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,794	5,792
Loans charged-off	(9,817)	(9,290)
Recoveries	6,187	5,192
PCL, LHFI	2,977	4,100
Balance at end of period	5,141	5,794	5,792
State and Other Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	646	885
Loans charged-off	0	0
Recoveries	0	0
PCL, LHFI	604	(239)
Balance at end of period	1,250	646	885
Other Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	7,072	4,647
Loans charged-off	(95)	(314)
Recoveries	65	0
PCL, LHFI	(795)	2,739
Balance at end of period	6,247	7,072	4,647
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	17,192	12,828
Loans charged-off	(32)	(242)
Recoveries	1,024	142
PCL, LHFI	(11,732)	4,464
Balance at end of period	6,452	17,192	12,828
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	12,942	12,374
Loans charged-off	(512)	(320)
Recoveries	672	439
PCL, LHFI	(1,755)	449
Balance at end of period	11,347	12,942	12,374
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	24,043	19,488
Loans charged-off	(2,545)	(278)
Recoveries	154	2,328
PCL, LHFI	16,244	2,505
Balance at end of period	37,896	24,043	19,488
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,488	4,743
Loans charged-off	(89)	0
Recoveries	1	28
PCL, LHFI	15,091	(283)
Balance at end of period	19,491	4,488	4,743
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	34,794	21,185
Loans charged-off	(10,304)	(1,457)
Recoveries	152	38
PCL, LHFI	7,487	15,028
Balance at end of period	32,129	34,794	21,185
Other Loans Secured by Real Estate [Member] | Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,758	15,132
Loans charged-off	(2,507)	(3,453)
Recoveries	714	73
PCL, LHFI	9,332	(5,994)
Balance at end of period	$ 13,297	$ 5,758	$ 15,132

Premises and Equipment, Net - P

Premises and Equipment, Net - Premises and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	$ 533,344	$ 513,664
Less accumulated depreciation and amortization	302,201	286,383
Premises and equipment, net	231,143	227,281
Finance lease right-of-use assets	3,299	3,751
Assets held for sale	968	1,197
Total premises and equipment, net	235,410	232,229
Land [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	56,610	56,747
Building and Leasehold Improvements [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	249,405	246,759
Furniture and Equipment [Member]
Premises and Equipment, Net, by Type [Abstract]
Total cost of premises and equipment	$ 227,329	$ 210,158

Premises and Equipment, Net - A

Premises and Equipment, Net - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) Property	Dec. 31, 2023 USD ($) Property	Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Abstract]
Number of property held for sale | Property	2	3
Property valuation adjustments	$ 0	$ 470,000	$ 400,000
Premises and Equipment, Net, by Type [Abstract]
Depreciation and amortization of premises and equipment	$ 18,700,000	$ 17,400,000	$ 16,200,000

Mortgage Banking - Schedule of

Mortgage Banking - Schedule of Activity in the Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Mortgage servicing rights [Abstract]
Balance at beginning of period	$ 131,870	$ 129,677
Origination of servicing assets	13,291	13,712
Change in fair value:
Due to market changes	$ 5,801	$ (1,489)
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 runoff	$ (11,645)	$ (10,030)
Balance at end of period	$ 139,317	$ 131,870

Mortgage Banking - Additional I

Mortgage Banking - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) CPR	Dec. 31, 2023 USD ($) CPR	Dec. 31, 2022 USD ($)
Schedule of changes in the reserve for mortgage loan [Abstract]
Assumed average prepayment speed | CPR	8	9
Average discount rate	10.65%	10.07%
Annual servicing fee	$ 28,000	$ 26,900	$ 26,000
Servicing fee income percentage of outstanding balance of underlying loans	0.32%
Mortgage servicing rights [Abstract]
Residential mortgage loans sold	$ 1,141,000	1,136,000	1,243,000
Gains on sale of mortgage banking	$ 19,300	15,300	$ 20,200
Period of putback response	60 days
Reserve for mortgage loan servicing putback expenses	$ 500	$ 500

Mortgage Banking - Schedule o_2

Mortgage Banking - Schedule of Mortgage Loans Sold and Serviced for Others (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	$ 8,762,709	$ 8,477,375
Federal National Mortgage Association [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	4,821,246	4,826,028
Government National Mortgage Association [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	3,695,419	3,510,983
Federal Home Loan Mortgage Corporation [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	213,358	112,352
Other [Member]
Mortgage Loans On Real Estate [Line Items]
Total mortgage loans sold and serviced for others	$ 32,686	$ 28,012

Goodwill and Identifiable Int_3

Goodwill and Identifiable Intangible Assets - Goodwill by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 334,605
Balance, end of period	334,605	$ 334,605
General Banking [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	334,605	334,605
Adjustment	0	0
Balance, end of period	$ 334,605	$ 334,605

Goodwill and Identifiable Int_4

Goodwill and Identifiable Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Amortization expense of identifiable intangible assets	$ 110,000	$ 290,000	$ 985,000
Impairment losses on identifiable intangible assets	0	0	0
Future amortization expense for identifiable intangible assets [Abstract]
2025	126,000
2026	0
2027	0
2028	0
2029	0
General Banking Segment [Member]
Goodwill [Line Items]
Impairment charge	$ 0	$ 0	$ 0

Goodwill and Identifiable Int_5

Goodwill and Identifiable Intangible Assets - Schedule of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 87,674	$ 88,999
Accumulated Amortization	87,548	88,763
Net Carrying Amount	126	236
Core Deposit Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	87,674	87,674
Accumulated Amortization	87,548	87,438
Net Carrying Amount	$ 126	236
Remaining Weighted-Average Amortization Periods in Years	1 year
Banking Charters [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 0	1,325
Accumulated Amortization	0	1,325
Net Carrying Amount	$ 0	$ 0

Other Real Estate - Changes and

Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of period	$ 6,867	$ 1,986	$ 4,557
Additions	6,782	7,237	1,533
Disposals	(6,084)	(2,555)	(4,142)
(Write-downs) recoveries	(1,648)	199	38
Balance at end of period	5,917	6,867	1,986
Gains (losses), net on the sale of other real estate included in other real estate expense	$ (1,104)	$ (145)	$ (1,006)

Other Real Estate - Other Real

Other Real Estate - Other Real Estate, By Type of Property (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other real estate [Line Items]
Total other real estate	$ 5,917	$ 6,867	$ 1,986	$ 4,557
Construction, Land Development And Other Land Properties [Member]
Other real estate [Line Items]
Total other real estate	46	0
1 - 4 Family Residential Properties [Member]
Other real estate [Line Items]
Total other real estate	2,260	1,977
Nonfarm, Nonresidential Properties [Member]
Other real estate [Line Items]
Total other real estate	3,611	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		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Real Estate by Geographic Location [Line Items]
Total other real estate		$ 5,917	$ 6,867	$ 1,986	$ 4,557
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]	2,407	1,242
Tennessee [Member]
Other Real Estate by Geographic Location [Line Items]
Total other real estate	[2]	1,079	0
Texas [Member]
Other Real Estate by Geographic Location [Line Items]
Total other real estate		$ 2,261	$ 4,228
[1] Mississippi includes Central and Southern Mississippi Regions. Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.

Other Real Estate - Additional

Other Real Estate - Additional information (Details) - USD ($) $ in Millions	Dec. 31, 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	$ 2.3	$ 2
Consumer mortgage loans and that formal foreclosure proceedings are in process	$ 7.6	$ 6.4

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Interest Income from its Sales-Type and Direct Financing Leases	$ 12.7	$ 3.2
Minimum [Member]
Lessee, Lease, Description [Line Items]
Remaining Lease Term	2 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Remaining Lease Term	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	Dec. 31, 2024	Dec. 31, 2023
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Leases receivable	$ 282,771	$ 161,319
Unearned income	(45,585)	(29,011)
Initial direct costs	2,252	1,326
Unguaranteed lease residual	7,084	4,101
Total net investment	$ 246,522	$ 137,735

Leases - Minimum Future Lease P

Leases - Minimum Future Lease Payments for Trustmark's Leases Receivable (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Sales-Type and Direct Financing Leases, Payment to be Received, Fiscal Year Maturity [Abstract]
2025	$ 50,494
2026	49,906
2027	62,457
2028	52,086
2029	38,486
Thereafter	29,342
Total leases receivable	$ 282,771

Leases - Components of Net Leas

Leases - Components of Net Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finance leases
Amortization of right-of-use assets	$ 452	$ 786	$ 1,479
Interest on lease liabilities	148	163	188
Operating lease cost	5,075	4,787	4,577
Short-term lease cost	230	229	307
Variable lease cost	841	840	1,080
Sublease income	(122)	(12)	(168)
Net lease cost	$ 6,624	$ 6,793	$ 7,463

Leases - Cash Payments Included

Leases - Cash Payments Included in Measurement of Lease Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finance leases
Operating cash flows included in operating activities	$ 148	$ 163	$ 188
Financing cash flows included in payments under finance lease obligations	424	721	1,409
Operating leases
Operating cash flows (fixed payments) included in other operating activities, net	4,848	3,666	4,242
Operating cash flows (liability reduction) included in other operating activities, net	$ 3,473	$ 3,204	$ 3,514

Leases - Balance Sheet Informat

Leases - Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Finance lease right-of-use assets, net of accumulated depreciation	$ 3,299	$ 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	$ 3,910	$ 4,334
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Operating lease right-of-use assets	$ 34,668	$ 35,711
Operating lease liabilities	$ 38,698	$ 39,097
Weighted-average lease term
Finance leases	7 years 4 months 6 days	8 years 4 months 2 days
Operating leases	9 years 3 months 21 days	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	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Finance leases, 2025	$ 584
Finance leases, 2026	589
Finance leases, 2027	594
Finance leases, 2028	599
Finance leases, 2029	633
Finance leases, Thereafter	1,454
Finance leases, total minimum lease payments	4,453
Finance leases, imputed interest	(543)
Finance lease liabilities	3,910	$ 4,334
Operating leases, 2025	5,288
Operating leases, 2026	5,161
Operating leases, 2027	5,193
Operating leases, 2028	4,824
Operating leases, 2029	4,655
Operating leases, Thereafter	21,258
Operating leases, total minimum lease payments	46,379
Operating leases, imputed interest	(7,681)
Operating lease liabilities	$ 38,698	$ 39,097

Deposits - Deposits Summary (De

Deposits - Deposits Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Noninterest-bearing demand	$ 3,073,565	$ 3,197,620
Interest-bearing demand	5,453,708	4,947,626
Savings	3,387,984	4,047,853
Time	3,192,918	3,376,664
Total deposits	$ 15,108,175	$ 15,569,763

Deposits - Interest Expense on

Deposits - Interest Expense on Deposits by Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest expense on deposits by type [Abstract]
Interest-bearing demand	$ 148,888	$ 121,138	$ 16,409
Savings	30,121	28,605	9,654
Time	150,372	96,208	3,006
Total	$ 329,381	$ 245,951	$ 29,069

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Time deposits that exceed the FDIC insurance limit of $250 thousand	$ 935.4	$ 822.4

Deposits - Maturities of Intere

Deposits - Maturities of Interest-Bearing Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Maturities of interest-bearing deposits [Abstract]
2025	$ 3,090,620
2026	75,164
2027	15,143
2028	5,764
2029	5,169
Thereafter	1,058
Total time deposits	3,192,918	$ 3,376,664
Interest-bearing deposits with no stated maturity	8,841,692
Total interest-bearing deposits	$ 12,034,610	$ 12,372,143

Borrowings - Securities Sold Un

Borrowings - Securities Sold Under Repurchase Agreements - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Securities sold under repurchase agreements, secured by securities carrying amount	$ 40.3	$ 61.6

Borrowings - Schedule of Securi

Borrowings - Schedule of Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 29,341	$ 29,126
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	11,685	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	7,487	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	$ 10,169	$ 0

Borrowings - Summary of Other B

Borrowings - Summary of Other Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
FHLB advances	$ 200,000	$ 400,058
Serviced GNMA loans eligible for repurchase	97,631	78,838
Finance lease liabilities	$ 3,910	$ 4,334
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Total other borrowings	Total other borrowings
Total other borrowings	$ 301,541	$ 483,230

Borrowings - FHLB Advances - Ad

Borrowings - FHLB Advances - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) Loan	Dec. 31, 2023 USD ($) Loan	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Weighted-average cost related to FHLB advances (in hundredths)	4.60%	5.54%
Weighted average remaining maturity	8 days	9 days
Atlanta | BancTrust [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Number of outstanding short-term FHLB advances | Loan	0	0
Interest rate (in hundredths)		0.08%
Debt instrument remaining maturity period		2 years 8 months 15 days
Number of outstanding long-term FHLB advances | Loan	0	1
Long-term FHLB advances		$ 58,000
Atlanta | BancTrust [Member] | Fair Market Value Adjustment [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Fair value adjustment on FHLB advances		$ 0
Dallas [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Number of outstanding short-term FHLB advances | Loan	2	5
Short-term FHLB advances	$ 200,000,000	$ 400,000,000
Long-term FHLB advances	0	0
Additional debt instrument borrowing capacity	4,292,000,000	4,003,000,000
Dallas [Member] | Short Term FhlbAdvances1 [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Short-term FHLB advances	$ 100,000,000
Interest rate (in hundredths)	4.55%
Dallas [Member] | Short Term FhlbAdvances2 [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Interest rate (in hundredths)	4.65%
Dallas [Member] | Fair Market Value Adjustment [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Interest expense, short-term borrowings		49,900,000
Dallas [Member] | BancTrust [Member] | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Interest expense, long-term borrowings	$ 0	$ 0	$ 0
Dallas [Member] | BancTrust [Member] | Fair Market Value Adjustment [Member]
Debt Instrument [Line Items]
Interest expense, short-term borrowings	$ 16,800,000		$ 4,800,000

Borrowings - Subordinated Notes

Borrowings - Subordinated Notes Payable - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Dec. 01, 2025	Dec. 31, 2020	Dec. 31, 2024	Dec. 31, 2020	Dec. 31, 2023
Debt Instrument [Line Items]
Subordinated notes			$ 123,702		$ 123,482
Subordinated Notes [Member]
Debt Instrument [Line Items]
Face amount of debt issued		$ 125,000		$ 125,000
Interest rate (in hundredths)		3.625%	3.625%	3.625%
Maturity date				Dec. 01, 2030
Underwriting discount percentage		1.20%
Proceeds from issuance of subordinated notes before deducting offering expenses		$ 123,500
Subordinated notes			$ 123,700		$ 123,500
Frequency of periodic payment			semi-annually
Subordinated Notes [Member] | Forecast
Debt Instrument [Line Items]
Frequency of periodic payment	quarterly
Variable interest rate, description	Three-Month Term Secured Overnight Financing Rate (SOFR)
Basis spread percentage (in hundredths)	3.387%

Borrowings - Junior Subordinate

Borrowings - Junior Subordinated Debt Securities - Additional information (Details) $ in Thousands		12 Months Ended
	Aug. 18, 2006 USD ($) qtr	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Junior subordinated debt securities		$ 61,856	$ 61,856
Total assets		18,152,422	18,722,189
Total liabilities and shareholders' equity		18,152,422	18,722,189
Common securities		12,711	12,725
Net income		223,009	165,489	$ 71,887
Trustmark Preferred Capital Trust I [Member] | Junior Subordinated Debt Securities [Member]
Variable Interest Entity [Line Items]
Face amount of debt issued	$ 60,000
Maturity date	Sep. 30, 2036
Variable interest rate, description	three-month Chicago Mercantile Exchange, Inc. (CME) SOFR
Basis spread over SOFR rate (in hundredths)	0.26%
Debt instrument interest rate margin	1.72%
Junior subordinated debt securities	$ 61,900
Consecutive quarters that Trustmark may defer interest payments | qtr	20
Total assets		61,900	61,900
Total liabilities and shareholders' equity		61,900	61,900
Trust preferred securities		60,000	60,000
Common securities		1,900	1,900
Net income		134	132	66
Dividends paid		$ 134	$ 132	$ 66

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Summary of Noninterest Income (Loss) Disaggregated by Reportable Operating Segment and Revenue Stream (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		$ 44,382	$ 43,416	$ 42,157
Bank card and other fees		33,301	33,439	36,105
Mortgage banking, net		26,626	26,216	28,306
Wealth management		37,251	35,092	35,013
Other, net		17,813	10,231	9,841
Securities gains (losses), net		(182,792)	39
Total Noninterest Income (loss)		(23,419)	148,433	151,422
Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		44,382	43,416	42,157
Bank card and other fees		31,163	30,444	31,521
Wealth management		37,251	35,092	35,013
Other, net		17,099	11,931	8,997
Total Noninterest Income (loss)		129,895	120,883	117,688
Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Bank card and other fees	[1]	2,138	2,995	4,584
Mortgage banking, net	[1]	26,626	26,216	28,306
Other, net	[1]	714	(1,700)	844
Securities gains (losses), net	[1]	(182,792)	39
Total Noninterest Income (loss)	[1]	(153,314)	27,550	33,734
General Banking Segment [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		44,295	43,329	42,073
Bank card and other fees		33,148	33,382	36,058
Mortgage banking, net		26,626	26,216	28,306
Wealth management		748	838	639
Other, net		17,243	9,693	9,274
Securities gains (losses), net		(182,792)	39
Total Noninterest Income (loss)		(60,732)	113,497	116,350
General Banking Segment [Member] | Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		44,295	43,329	42,073
Bank card and other fees		31,010	30,387	31,474
Wealth management		748	838	639
Other, net		16,906	11,769	8,469
Total Noninterest Income (loss)		92,959	86,323	82,655
General Banking Segment [Member] | Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Bank card and other fees	[1]	2,138	2,995	4,584
Mortgage banking, net	[1]	26,626	26,216	28,306
Other, net	[1]	337	(2,076)	805
Securities gains (losses), net	[1]	(182,792)	39
Total Noninterest Income (loss)	[1]	(153,691)	27,174	33,695
Wealth Management Segment [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		87	87	84
Bank card and other fees		153	57	47
Mortgage banking, net		0	0	0
Wealth management		36,503	34,254	34,374
Other, net		570	538	567
Total Noninterest Income (loss)		37,313	34,936	35,072
Wealth Management Segment [Member] | Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Service charges on deposit accounts		87	87	84
Bank card and other fees		153	57	47
Wealth management		36,503	34,254	34,374
Other, net		193	162	528
Total Noninterest Income (loss)		36,936	34,560	35,033
Wealth Management Segment [Member] | Not Topic 606 [Member]
Revenue From Contract With Customer [Line Items]
Other, net	[1]	377	376	39
Total Noninterest Income (loss)	[1]	$ 377	$ 376	$ 39
[1] Noninterest income (loss) not in scope for FASB ASC Topic 606 includes customer derivatives revenue and miscellaneous credit card income within bank card and other fees; mortgage banking, net; amortization of tax credits, accretion of the FDIC indemnification asset, 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 securities gains (losses), net.

Income Taxes - Income Tax Provi

Income Taxes - Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current [Abstract]
Federal	$ (28,470)	$ 26,100	$ 12,362
State	(6,563)	6,392	2,560
Deferred [Abstract]
Federal	19,104	(3,798)	(13,388)
State	4,776	(950)	(3,347)
Income tax provision	$ (11,153)	$ 27,744	$ (1,813)

Income Taxes - Income Tax Recon

Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of provision for tax from the federal rate to the effective tax rate [Abstract]
Income tax computed at statutory tax rate	$ 7,152	$ 38,018	$ 12,412
Tax exempt interest	(5,605)	(5,521)	(4,419)
Nondeductible interest expense	2,153	2,104	271
State income taxes, net	(5,185)	5,050	2,025
Income tax credits, net	(11,483)	(11,904)	(10,071)
Death benefit gains	(92)	(80)	(287)
Other	1,907	77	(1,744)
Income tax provision	$ (11,153)	$ 27,744	$ (1,813)

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets [Abstract]
Litigation losses	$ 0	$ 26,647
Other real estate	2,293	1,743
Accumulated credit losses	47,416	43,473
Deferred compensation	19,299	17,893
Finance and operating lease liabilities	10,652	11,426
Realized built-in losses	7,679	8,429
Securities	22,294	68,223
Pension and other postretirement benefit plans	1,574	2,025
Interest on nonaccrual loans	1,173	1,218
LHFS	236	777
Stock-based compensation	3,544	3,196
Derivatives	4,018	2,993
Tax credit carryforward	3,489	0
Other	8,745	10,543
Gross deferred tax asset	132,412	198,586
Deferred tax liabilities [Abstract]
Goodwill and other identifiable intangibles	13,880	14,297
Premises and equipment	14,218	17,382
Finance and operating lease right-of-use assets	9,492	10,420
MSR	29,206	26,271
Securities	3,789	3,181
Equipment financing	8,803	0
Other	2,874	2,264
Gross deferred tax liability	82,262	73,815
Net deferred tax asset	$ 50,150	$ 124,771

Income Taxes - Changes in Unrec

Income Taxes - Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in unrecognized tax benefits [Roll Forward]
Balance at beginning of period	$ 2,864	$ 2,316	$ 2,129
Change due to tax positions taken during the current year	1,497	1,333	653
Change due to tax positions taken during a prior year	(1,076)	(426)	(266)
Change due to the lapse of applicable statute of limitations during the current year	(407)	(359)	(200)
Balance at end of period	2,878	2,864	2,316
Accrued interest, net of federal benefit, at end of period	415	470	489
Unrecognized tax benefits that would impact the effective tax rate, if recognized, at end of period	$ 2,579	$ 2,518	$ 1,948

Defined Benefit and Other Pos_3

Defined Benefit and Other Postretirement Benefits - Plan Benefit Obligation, Plan Assets and Funded Status of the Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Trustmark Capital Accumulation Plan [Member] | Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year	$ 5,923	$ 6,907
Service cost	40	52	$ 115
Interest cost	246	292	192
Actuarial (gain) loss	(214)	164
Benefits paid	(464)	(1,492)
Benefit obligation, end of year	5,531	5,923	6,907
Change in plan assets [ Roll Forward]
Fair value of plan assets, beginning of year	2,403	2,907
Actual return on plan assets	233	237
Employer contributions	513	751
Benefit payments	(464)	(1,492)
Fair value of plan assets, end of year	2,685	2,403	2,907
Funded status at end of year - net liability	(2,846)	(3,520)
Amounts recognized in accumulated other comprehensive loss [Abstract]
Net (gain) loss - amount recognized	(601)	(262)
Actuarial (gain) loss included in benefit obligation:
Change in discount rate	(344)	124
Change in mortality table	0	(38)
Other	130	78
Actuarial (gain) loss	(214)	164
Supplemental Retirement Plan [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning of year	41,619	43,201
Service cost	45	69	71
Interest cost	1,851	2,013	1,278
Actuarial (gain) loss	(1,009)	763
Benefits paid	(4,344)	(4,427)
Benefit obligation, end of year	38,162	41,619	$ 43,201
Change in plan assets [ Roll Forward]
Employer contributions	4,344	4,427
Benefit payments	(4,344)	(4,427)
Funded status at end of year - net liability	(38,162)	(41,619)
Amounts recognized in accumulated other comprehensive loss [Abstract]
Net (gain) loss - amount recognized	6,880	8,235
Prior service cost	15	126
Amounts recognized	6,895	8,361
Actuarial (gain) loss included in benefit obligation:
Change in discount rate	(1,794)	649
Change in mortality table	0	(308)
Other	785	422
Actuarial (gain) loss	$ (1,009)	$ 763

Defined Benefit and Other Pos_4

Defined Benefit and Other Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net periodic benefit cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
Trustmark Capital Accumulation Plan [Member] | Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member]
Net periodic benefit cost [Abstract]
Service cost	$ 40	$ 52	$ 115
Interest cost	246	292	192
Expected return on plan assets	(96)	(107)	(121)
Recognized net (gain) loss due to lump sum settlements	(13)	25	0
Recognized net actuarial loss	0	0	224
Net periodic benefit cost	177	262	410
Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
Total recognized in other comprehensive income (loss)	(339)	9	(1,699)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ (162)	$ 271	$ (1,289)
Weighted-average assumptions as of end of year [Abstract]
Discount rate for benefit obligation	5.30%	4.67%	4.88%
Discount rate for net periodic benefit cost	4.67%	4.88%	2.41%
Expected long-term return on plan assets	5%	5%	5%
Supplemental Retirement Plan [Member]
Net periodic benefit cost [Abstract]
Service cost	$ 45	$ 69	$ 71
Interest cost	1,851	2,013	1,278
Amortization of prior service cost	111	111	111
Recognized net actuarial loss	346	284	986
Net periodic benefit cost	2,353	2,477	2,446
Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes:
Net (gain) loss	(1,355)	479	(10,181)
Amortization of prior service cost	(111)	(111)	(111)
Total recognized in other comprehensive income (loss)	(1,466)	368	(10,292)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ 887	$ 2,845	$ (7,846)
Weighted-average assumptions as of end of year [Abstract]
Discount rate for benefit obligation	5.30%	4.67%	4.88%
Discount rate for net periodic benefit cost	4.67%	4.88%	2.41%

Defined Benefit and Other Pos_5

Defined Benefit and Other Postretirement Benefits - Weighted-Average Asset Allocation (Details) - Trustmark Capital Accumulation Plan [Member] - Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member]	Dec. 31, 2024	Dec. 31, 2023
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	100%	100%
Money Market Funds [Member]
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	2%	27%
Exchange Traded Equity Securities Funds [Member]
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	33%	36%
Exchange Traded Fixed Income Funds [Member]
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	59%	28%
International Exchange Traded Funds [Member]
Asset target allocations [Abstract]
Weighted-average asset allocation (in hundredths)	6%	9%

Defined Benefit and Other Pos_6

Defined Benefit and Other Postretirement Benefits - Plan Assets Measured at Fair Value (Details) - Trustmark Capital Accumulation Plan [Member] - Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member] - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Asset target allocations [Abstract]
Fair value of plan assets	$ 2,685	$ 2,403	$ 2,907
Level 1 [Member]
Asset target allocations [Abstract]
Fair value of plan assets	2,685	2,403
Money Market Funds [Member]
Asset target allocations [Abstract]
Fair value of plan assets	55	643
Money Market Funds [Member] | Level 1 [Member]
Asset target allocations [Abstract]
Fair value of plan assets	55	643
Exchange Traded Equity Securities Funds [Member]
Asset target allocations [Abstract]
Fair value of plan assets	874	861
Exchange Traded Equity Securities Funds [Member] | Level 1 [Member]
Asset target allocations [Abstract]
Fair value of plan assets	874	861
Exchange Traded Fixed Income Funds [Member]
Asset target allocations [Abstract]
Fair value of plan assets	1,600	690
Exchange Traded Fixed Income Funds [Member] | Level 1 [Member]
Asset target allocations [Abstract]
Fair value of plan assets	1,600	690
International Exchange Traded Funds [Member]
Asset target allocations [Abstract]
Fair value of plan assets	156	209
International Exchange Traded Funds [Member] | Level 1 [Member]
Asset target allocations [Abstract]
Fair value of plan assets	$ 156	$ 209

Defined Benefit and Other Pos_7

Defined Benefit and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Trustmark Capital Accumulation Plan [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		$ 127
Trustmark's contribution to the Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions		290
Estimated future benefit payments [Abstract]
Accumulated other comprehensive income (loss) expected to be recognized during next fiscal year as components of net periodic benefit cost		(7)
Trustmark Capital Accumulation Plan [Member] | Forecast
Defined Benefit Plan Disclosure [Line Items]
Trustmark's minimum required contribution to the Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions	$ 109
Supplemental Retirement Plan [Member]
Estimated future benefit payments [Abstract]
Accumulated other comprehensive income (loss) expected to be recognized during next fiscal year as components of net periodic benefit cost		261
Accumulated other comprehensive loss expected to be recognized during next fiscal year as prior service cost		15
Defined Contribution Plan [Member]
Other Benefit Plans - Defined Contribution Plan [Abstract]
Trustmarks contribution to defined contribution plan		$ 10,700	$ 10,800	$ 10,200
Contributions up to a maximum of eligible compensation		6%
Automatically enrolled Contributions of eligible compensation		3%
Trustmark contributions to the plan		100%
Period when associates may become eligible to make elective deferral contributions after employment		60 days

Defined Benefit and Other Pos_8

Defined Benefit and Other Postretirement Benefits - Estimated Future Benefit Payments and Other Disclosures (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Supplemental Retirement Plan [Member]
Estimated future benefit payments [Abstract]
2025	$ 3,885
2026	3,850
2027	3,673
2028	3,550
2029	3,545
2030 - 2034	15,563
Trustmark Corporation Pension Plan for Certain Employees of Acquired Financial Institutions [Member] | Trustmark Capital Accumulation Plan [Member]
Estimated future benefit payments [Abstract]
2025	693
2026	762
2027	961
2028	535
2029	414
2030 - 2034	$ 1,575

Stock and Incentive Compensat_3

Stock and Incentive Compensation Plans - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 shares
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 Awards [Member] | Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Time-based Awards [Member] | Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	1 year
Stock and Incentive Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock available for issuance (in shares)	849,968

Stock and Incentive Compensat_4

Stock and Incentive Compensation Plans - Summary of Stock Plan Activity (Details) - Stock and Incentive Compensation Plan [Member] - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Performance Units [Member]
Shares [Roll Forward]
Nonvested shares, beginning of year (in shares)	174,214	148,416	140,821
Granted (in shares)	80,580	70,666	60,773
Adjustment for performance factor (shares)	9,348	0	0
Released from restriction (in shares)	(54,973)	(39,943)	(19,723)
Forfeited (in shares)	(1,124)	(4,925)	(33,455)
Nonvested shares, end of year (in shares)	208,045	174,214	148,416
Weighted-Average Grant Date Fair Value [Abstract]
Nonvested shares, beginning of year (in dollars per share)	$ 30.81	$ 31.63	$ 31.8
Granted (in dollars per share)	26.67	29.78	32.64
Adjustment for performance factor (in dollars per share)	30.02	0	0
Released from restriction (in dollars per share)	30.02	31.98	33.4
Forfeited (in dollars per share)	28.32	31.41	33.11
Nonvested shares, end of year (in dollars per share)	$ 29.39	$ 30.81	$ 31.63
Time-based Awards [Member]
Shares [Roll Forward]
Nonvested shares, beginning of year (in shares)	358,252	312,978	337,466
Granted (in shares)	167,646	145,003	133,307
Released from restriction (in shares)	(140,637)	(90,587)	(148,905)
Forfeited (in shares)	(12,985)	(9,142)	(8,890)
Nonvested shares, end of year (in shares)	372,276	358,252	312,978
Weighted-Average Grant Date Fair Value [Abstract]
Nonvested shares, beginning of year (in dollars per share)	$ 30.04	$ 30.99	$ 31.18
Granted (in dollars per share)	27.27	28.59	31.85
Released from restriction (in dollars per share)	28.63	30.9	32.16
Forfeited (in dollars per share)	28.79	30.72	31.62
Nonvested shares, end of year (in dollars per share)	$ 29.37	$ 30.04	$ 30.99

Stock and Incentive Compensat_5

Stock and Incentive Compensation Plans - Compensation Expense for Awards Under Stock Plan (Details) - Stock and Incentive Compensation Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	$ 7,215	$ 6,155	$ 4,883
Unrecognized compensation expense	4,925
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	2,827	1,772	1,258
Unrecognized compensation expense	$ 2,110
Weighted average life of unrecognized compensation expense	1 year 8 months 1 day
Time Based Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized compensation expense	$ 4,388	$ 4,383	$ 3,625
Unrecognized compensation expense	$ 2,815
Weighted average life of unrecognized compensation expense	1 year 7 months 17 days

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 4,575	$ 4,907
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Potential exposure to credit loss in the event of nonperformance	$ 110.4	125.4
Letters of credit, maturity term - maximum	3 years
Collateral held, fair value	$ 27.2	$ 31.4

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Changes in ACL on Off-balance Sheet Credit Exposures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 34,057	$ 36,838	$ 35,623
PCL, off-balance sheet credit exposures	(4,665)	(2,781)	1,215
Balance at end of period	$ 29,392	$ 34,057	$ 36,838

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($) shares in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2025	Dec. 31, 2024	Dec. 31, 2022	Dec. 03, 2024	Dec. 05, 2023	Dec. 06, 2022	Dec. 07, 2021
Stockholders Equity [Line items]
Capital conservation buffer rate		2.50%
Dividend potential for next fiscal year		$ 255.3
Period for which retained net income considered for approval		2 years
Stock Repurchase Program 4 [Member]
Stockholders Equity [Line items]
Amount of stock authorized for repurchase							$ 100
Stock Repurchase Program 4 [Member] | Common Stock [Member]
Stockholders Equity [Line items]
Repurchase shares of common stock			789
Repurchase shares of common stock, value			$ 24.6
Stock Repurchase Program 5 [Member]
Stockholders Equity [Line items]
Amount of stock authorized for repurchase						$ 50
Stock Repurchase Program 6 [Member]
Stockholders Equity [Line items]
Amount of stock authorized for repurchase					$ 50
Stock Repurchase Program 6 [Member] | Common Stock [Member]
Stockholders Equity [Line items]
Repurchase shares of common stock		203
Repurchase shares of common stock, value		$ 7.5
Stock Repurchase Program 7 [Member]
Stockholders Equity [Line items]
Amount of stock authorized for repurchase				$ 100
Stock Repurchase Program 7 [Member] | Common Stock [Member] | Subsequent Event [Member]
Stockholders Equity [Line items]
Repurchase shares of common stock	243
Repurchase shares of common stock, value	$ 8.5

Shareholders' Equity - Table of

Shareholders' Equity - Table of Actual Regulatory Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 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	$ 1,729,672	$ 1,521,665
Actual Regulatory Capital Ratio	11.54%	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	$ 1,789,672	$ 1,581,665
Actual Regulatory Capital Ratio	11.94%	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	$ 2,094,874	$ 1,862,246
Actual Regulatory Capital Ratio	13.97%	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	$ 1,789,672	$ 1,581,665
Actual Regulatory Capital Ratio	9.99%	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	$ 1,828,044	$ 1,602,327
Actual Regulatory Capital Ratio	12.20%	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	$ 1,828,044	$ 1,602,327
Actual Regulatory Capital Ratio	12.20%	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	$ 2,009,544	$ 1,759,426
Actual Regulatory Capital Ratio	13.41%	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	$ 1,828,044	$ 1,602,327
Actual Regulatory Capital Ratio	10.21%	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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax amount	$ 181,419	$ 73,931	$ (323,790)
Other Comprehensive Income (Loss), Tax, Total	(45,355)	(18,251)	80,947
Other comprehensive income (loss), before reclassifications, net of tax amount	(14,888)	43,185	(244,088)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	150,952	12,495	1,245
Other comprehensive income (loss), net of tax amount	136,064	55,680	(242,843)
Securities Available for Sale and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, before tax amount	(13,666)	50,537	(229,524)
Reclassification from accumulated other comprehensive income, current period, before tax amount	182,792	(39)
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, before tax amount	14,587	15,557	(86,033)
Other comprehensive income (loss), before tax amount	183,713	66,055	(315,557)
Other comprehensive income (loss), before reclassifications, tax (expense) benefit	3,417	(12,404)	57,381
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(45,698)	10
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, tax (expense) benefit	(3,647)	(3,889)	21,508
Other Comprehensive Income (Loss), Tax, Total	(45,928)	(16,283)	78,889
Other comprehensive income (loss), before reclassifications, net of tax amount	(10,249)	38,133	(172,143)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	137,094	(29)
Other comprehensive income (loss), change in net unrealized holding loss on securities transferred to held to maturity, net of tax amount	10,940	11,668	(64,525)
Other comprehensive income (loss), net of tax amount	137,785	49,772	(236,668)
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	111	111	111
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(28)	(28)	(28)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	83	83	83
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	(13)	25
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	3	(6)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	(10)	19
Change in Net Actuarial Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, before tax amount	1,460	(691)	10,792
Reclassification from accumulated other comprehensive income, current period, before tax amount	248	177	1,089
Other comprehensive income (loss), before reclassifications, tax (expense) benefit	(365)	173	(2,698)
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(62)	(44)	(272)
Other comprehensive income (loss), before reclassifications, net of tax amount	1,095	(518)	8,094
Reclassification from accumulated other comprehensive income, current period, net of tax amount	186	133	817
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	1,806	(378)	11,992
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(452)	95	(2,998)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	1,354	(283)	8,994
Cash Flow Hedge Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications, before tax amount	(22,232)	(8,131)	(20,685)
Reclassification from accumulated other comprehensive income, current period, before tax amount	18,132	16,385	460
Other comprehensive income (loss), before tax amount	(4,100)	8,254	(20,225)
Other comprehensive income (loss), before reclassifications, tax (expense) benefit	5,558	2,033	5,171
Reclassification from accumulated other comprehensive income, current period, tax (expense) benefit	(4,533)	(4,096)	(115)
Other Comprehensive Income (Loss), Tax, Total	1,025	(2,063)	5,056
Other comprehensive income (loss), before reclassifications, net of tax amount	(16,674)	(6,098)	(15,514)
Reclassification from accumulated other comprehensive income, current period, net of tax amount	13,599	12,289	345
Other comprehensive income (loss), net of tax amount	$ (3,075)	$ 6,191	$ (15,169)

Shareholders' Equity - Changes

Shareholders' Equity - Changes in Balances of Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,661,847	$ 1,492,268	$ 1,741,311
Other comprehensive income (loss) before reclassification	(14,888)	43,185	(244,088)
Amounts reclassified from accumulated other comprehensive income (loss)	150,952	12,495	1,245
Other comprehensive income (loss), net of tax amount	136,064	55,680	(242,843)
Balance	1,962,327	1,661,847	1,492,268
Securities Available for Sale and Transferred Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(204,670)	(254,442)	(17,774)
Other comprehensive income (loss) before reclassification	691	49,801	(236,668)
Amounts reclassified from accumulated other comprehensive income (loss)	137,094	(29)	0
Other comprehensive income (loss), net of tax amount	137,785	49,772	(236,668)
Balance	(66,885)	(204,670)	(254,442)
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(6,075)	(5,792)	(14,786)
Other comprehensive income (loss) before reclassification	1,095	(518)	8,094
Amounts reclassified from accumulated other comprehensive income (loss)	259	235	900
Other comprehensive income (loss), net of tax amount	1,354	(283)	8,994
Balance	(4,721)	(6,075)	(5,792)
Cash Flow Hedge Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(8,978)	(15,169)	0
Other comprehensive income (loss) before reclassification	(16,674)	(6,098)	(15,514)
Amounts reclassified from accumulated other comprehensive income (loss)	13,599	12,289	345
Other comprehensive income (loss), net of tax amount	(3,075)	6,191	(15,169)
Balance	(12,053)	(8,978)	(15,169)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(219,723)	(275,403)	(32,560)
Balance	$ (83,659)	$ (219,723)	$ (275,403)

Fair Value - Financial Assets a

Fair Value - Financial Assets and Liabilities Measured at Fair Value Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 1,692,534	$ 1,762,878
Loans held for sale (LHFS)	200,307	184,812
Mortgage servicing rights (MSR)	139,317	131,870	$ 129,677
U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	202,669	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	38,807	5,792
Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0
Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,692,534	1,762,878
Loans held for sale (LHFS)	200,307	184,812
Mortgage servicing rights (MSR)	139,317	131,870
Other assets - derivatives	15,397	23,316
Other liabilities - derivatives	$ 41,355	$ 35,600
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	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	$ 202,669	$ 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	38,807	5,792
Recurring Basis [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0
Recurring Basis [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,451,058	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	202,669	372,368
Loans held for sale (LHFS)	0	0
Mortgage servicing rights (MSR)	0	0
Other assets - derivatives	18	7,685
Other liabilities - derivatives	2,183	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	202,669	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] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		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	1,489,865	1,390,510
Loans held for sale (LHFS)	200,307	184,812
Mortgage servicing rights (MSR)	0	0
Other assets - derivatives	15,150	14,786
Other liabilities - derivatives	39,172	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	38,807	5,792
Level 2 [Member] | Recurring Basis [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0
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	1,451,058	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)	139,317	131,870
Other assets - derivatives	229	845
Other liabilities - derivatives	0	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] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		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		12 Months Ended
		Dec. 31, 2024	Dec. 31, 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]	(5,844)	(11,519)
Additions		13,291	13,712
Sales		0	0
Ending Balance		139,317	131,870
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		5,801	(1,489)
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]	2,229	2,470
Additions		0	0
Sales		(2,845)	(1,782)
Ending Balance		229	845
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		$ 1,681	$ 1,103
[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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Outstanding balances in collateral dependent related to allowance for credit losses	$ 37,100	$ 49,100
Collateral dependent related to allowance for credit losses	13,700	12,400
Foreclosed assets re-measured after initial recognition	5,500	898
Write-downs of allowance for foreclosed assets after initial recognition	2,200	243
Noninterest gain (loss) Mortgage banking, net for changes in fair value of LHFS	(2,100)	2,200	$ (3,300)
Interest and fees on fair value option LHFS	8,600	7,800	$ 6,800
Serviced GNMA loans eligible for repurchase	$ 97,631	$ 78,838

Fair Value - Carrying Amounts a

Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	$ 1,335,385	$ 1,426,279
Net LHFI	12,929,672	12,811,157
Deposits	15,108,175	15,569,763
Federal funds purchased and securities sold under repurchase agreements	324,008	405,745
Other borrowings	301,541	483,230
Subordinated notes	123,702	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	567,251	975,343
Securities held to maturity	1,335,385	1,426,279
Deposits	15,108,175	15,569,763
Federal funds purchased and securities sold under repurchase agreements	324,008	405,745
Other borrowings	301,541	483,230
Subordinated notes	123,702	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	567,251	975,343
Securities held to maturity	1,259,107	1,355,504
Deposits	15,098,854	15,553,417
Federal funds purchased and securities sold under repurchase agreements	324,008	405,745
Other borrowings	301,541	483,226
Subordinated notes	120,625	108,125
Junior subordinated debt securities	49,794	46,856
Level 3 [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net LHFI	12,929,672	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	$ 12,886,168	$ 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	Dec. 31, 2024	Dec. 31, 2023
Fair value and the contractual principal outstanding of the LHFS [Abstract]
Fair value of LHFS	$ 102,676	$ 105,974
LHFS contractual principal outstanding	105,322	102,994
Fair value less unpaid principal	$ (2,646)	$ 2,980

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) Contract	Dec. 31, 2023 USD ($) Contract	Dec. 31, 2022 USD ($)
Designated as Hedging Instrument [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total excluded components of earnings recognition	$ 474	$ 57
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	1,500,000	1,125,000
Interest and fees on LHFS and LHFI reclassified as a reduction over twelve months	8,100
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total notional amount	$ 1,500,000	$ 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	11	6
Aggregate notional amount of credit risk participation agreements	$ 83,900	$ 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	28	35
Aggregate notional amount of credit risk participation agreements	$ 229,100	$ 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	311,500	285,000
Net (negative) positive ineffectiveness on MSR fair value	(9,200)	(6,300)	$ (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	1,819,000	1,500,000
Termination value of derivatives	568	1,400
Collateral Posted	1,500	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	110,000	109,500
Valuation adjustment	679	(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	52,100	61,900
Valuation adjustment	$ 229	$ 845

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		$ 15,134	$ 14,781
Fair value of derivative liability		39,775	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]	74	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]	5,958	267
Designated as Hedging Instrument [Member] | Interest Rate Floor [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		1,582	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		16	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		76	63
Derivatives not Designated as Hedging Instruments [Member] | Future Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset		0	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		1,972	0
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liability		(679)	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		18	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		229	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]	13,478	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]	33,817	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		$ 211	$ 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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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
Derivatives in Hedging Relationships [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	$ (18,132)	$ (16,385)	$ (460)
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	(13,965)	(5,281)	(43,764)
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	$ 135	$ 271	$ 403

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	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in other comprehensive income (loss), net of tax	$ (13,599)	$ (12,289)	$ (345)
Derivatives in Hedging Relationships [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in other comprehensive income (loss), net of tax	$ (16,674)	$ (6,098)	$ (15,514)

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	Dec. 31, 2024	Dec. 31, 2023
Offsetting Derivative Assets
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	$ 15,134	$ 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	15,134	14,781
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	(7,956)	(4,339)
Cash Collateral Received, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	(2,000)	0
Net Amount, Offsetting of Derivative Assets	5,178	10,442
Offsetting Derivative Liabilities
Gross Amounts of Recognized Liabilities, Offsetting of Derivative Liabilities	39,775	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	39,775	34,522
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	(7,956)	(4,339)
Cash Collateral Posted, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	(1,460)	(2,040)
Net Amount, Offsetting of Derivative Liabilities	$ 30,359	$ 28,143

Segment Information - Additiona

Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 Segment
Segment Reporting [Abstract]
Number of segments in which the business operates	2
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CEO evaluates the financial performance of Trustmark's lines of business, such as evaluating revenue streams, significant expenses and budget to actual results, in assessing the performance of Trustmark's reportable segments and in the determination of allocating resources.

Segment Information - Schedule

Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Interest income		$ 960,330	$ 878,832	$ 541,833
Interest expense		375,909	325,954	47,125
Funds transfer pricing, net		0	0	0
Net Interest Income		584,421	552,878	494,708
PCL		41,255	24,581	22,892
Net Interest Income After PCL		543,166	528,297	471,816
Service charges on deposit accounts		44,382	43,416	42,157
Bank card and other fees		33,301	33,439	36,105
Mortgage banking, net		26,626	26,216	28,306
Wealth management		37,251	35,092	35,013
Other, net		17,813	10,231	9,841
Securities gains (losses), net		(182,792)	39	0
Internal allocations		0	0	0
Total Noninterest Income (loss)		(23,419)	148,433	151,422
Salaries and employee benefits		266,239	268,270	254,247
Services and fees		101,590	107,805	103,893
Other segment expenses	[1]	117,861	119,621	205,993
Internal allocations		0	0	0
Total Noninterest Expense		485,690	495,696	564,133
Income from continuing operations before income taxes		34,057	181,034	59,105
Income taxes		(11,153)	27,744	(1,813)
Income From Continuing Operations		45,210	153,290	60,918
Selected Financial Information
Total assets		18,152,422	18,722,189
Depreciation and amortization		38,067	35,756	39,882
Continuing Operations [Member]
Selected Financial Information
Total assets		18,152,422	18,654,555	17,939,266
Depreciation and amortization		37,849	35,185	39,197
General Banking [Member]
Segment Reporting Information [Line Items]
Interest income		949,600	869,143	534,531
Interest expense		373,369	324,470	47,044
Funds transfer pricing, net		2,231	2,326	1,900
Net Interest Income		578,462	546,999	489,387
PCL		41,101	26,716	22,913
Net Interest Income After PCL		537,361	520,283	466,474
Service charges on deposit accounts		44,295	43,329	42,073
Bank card and other fees		33,148	33,382	36,058
Mortgage banking, net		26,626	26,216	28,306
Wealth management		748	838	639
Other, net		17,243	9,693	9,274
Securities gains (losses), net		(182,792)	39	0
Internal allocations		(377)	(376)	(39)
Total Noninterest Income (loss)		(60,732)	113,497	116,350
Salaries and employee benefits		243,930	247,014	232,720
Services and fees		98,833	104,432	100,397
Other segment expenses	[1]	116,080	117,757	204,097
Internal allocations		(5,897)	(5,846)	(5,954)
Total Noninterest Expense		452,946	463,357	531,260
Income from continuing operations before income taxes		23,683	170,423	51,564
Income taxes		(13,726)	25,091	(3,683)
Income From Continuing Operations		37,409	145,332	55,247
Selected Financial Information
Total assets		17,938,268	18,469,213	17,724,953
Depreciation and amortization		37,599	34,924	38,909
General Banking [Member] | Internal Allocations [Member]
Segment Reporting Information [Line Items]
Other, net		17,620	10,069	9,313
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income		10,730	9,689	7,302
Interest expense		2,540	1,484	81
Funds transfer pricing, net		(2,231)	(2,326)	(1,900)
Net Interest Income		5,959	5,879	5,321
PCL		154	(2,135)	(21)
Net Interest Income After PCL		5,805	8,014	5,342
Service charges on deposit accounts		87	87	84
Bank card and other fees		153	57	47
Mortgage banking, net		0	0	0
Wealth management		36,503	34,254	34,374
Other, net		570	538	567
Securities gains (losses), net		0	0	0
Internal allocations		377	376	39
Total Noninterest Income (loss)		37,313	34,936	35,072
Salaries and employee benefits		22,309	21,256	21,527
Services and fees		2,757	3,373	3,496
Other segment expenses	[1]	1,781	1,864	1,896
Internal allocations		5,897	5,846	5,954
Total Noninterest Expense		32,744	32,339	32,873
Income from continuing operations before income taxes		10,374	10,611	7,541
Income taxes		2,573	2,653	1,870
Income From Continuing Operations		7,801	7,958	5,671
Selected Financial Information
Total assets		214,154	185,342	214,313
Depreciation and amortization		250	261	288
Wealth Management [Member] | Internal Allocations [Member]
Segment Reporting Information [Line Items]
Other, net		$ 193	$ 162	$ 528
[1] (1) Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.

Segment Information - Schedul_2

Segment Information - Schedule of Segment Information (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Other segment items composition description	Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.	Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.	Other segment expenses for the General Banking Segment include net occupancy-premises, equipment expense, litigation settlement expense, FDIC assessment expense, other real estate expense, net, loan expense and other miscellaneous expense. Other segment expenses for the Wealth Management Segment include net occupancy-premises, equipment expense, FDIC assessment expense, loan expense and other miscellaneous expense.

Parent Company Only Financial_3

Parent Company Only Financial Information - Parent Only Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Other assets	$ 677,230	$ 752,568
Total Assets	18,152,422	18,722,189
Liabilities and Shareholders' Equity:
Subordinated notes	123,702	123,482
Junior subordinated debt securities	61,856	61,856
Shareholders' equity	1,962,327	1,661,847	$ 1,492,268	$ 1,741,311
Total Liabilities and Shareholders' Equity	18,152,422	18,722,189
Expense:
Net Income	223,009	165,489	71,887
Operating Activities
Net income	223,009	165,489	71,887
Adjustments to reconcile net income to net cash provided by operating activities:
Other	(32,549)	1,192	(57,359)
Net cash from operating activities	116,929	196,887	296,516
Financing Activities
Common stock dividends	(56,790)	(56,653)	(56,679)
Repurchase and retirement of common stock	(7,499)	0	(24,604)
Net cash from financing activities	(809,615)	455,043	451,844
Net change in cash and cash equivalents	(408,092)	240,756	(1,532,042)
Trustmark Corp (Parent Company Only) [Member]
Assets
Investment in banks	2,062,555	1,770,392
Other assets	86,907	77,901
Total Assets	2,149,462	1,848,293
Liabilities and Shareholders' Equity:
Accrued expense	1,577	1,108
Subordinated notes	123,702	123,482
Junior subordinated debt securities	61,856	61,856
Shareholders' equity	1,962,327	1,661,847
Total Liabilities and Shareholders' Equity	2,149,462	1,848,293
Revenue:
Dividends received from banks	82,536	67,189	89,733
Earnings of subsidiaries over distributions	148,884	106,388	(11,269)
Other income	165	163	94
Total Revenue	231,585	173,740	78,558
Expense:
Other expense	8,576	8,251	6,671
Total Expense	8,576	8,251	6,671
Net Income	223,009	165,489	71,887
Operating Activities
Net income	223,009	165,489	71,887
Adjustments to reconcile net income to net cash provided by operating activities:
Net change in investment in subsidiaries	(148,884)	(106,388)	11,269
Other	(835)	(797)	(1,550)
Net cash from operating activities	73,290	58,304	81,606
Financing Activities
Common stock dividends	(56,790)	(56,653)	(56,679)
Repurchase and retirement of common stock	(7,499)	0	(24,604)
Net cash from financing activities	(64,289)	(56,653)	(81,283)
Net change in cash and cash equivalents	9,001	1,651	323
Cash and cash equivalents at beginning of year	77,511	75,860	75,537
Cash and cash equivalents at end of year	$ 86,512	$ 77,511	$ 75,860

Parent Company Only Financial_4

Parent Company Only Financial Information - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Financial Statements Captions [Line Items]
Income taxes paid	$ 21,472	$ 38,803	$ 2,701
Trustmark Corp (Parent Company Only) [Member]
Condensed Financial Statements Captions [Line Items]
Income taxes paid	21,500	38,800	2,700
Interest paid	$ 4,500	$ 4,500	$ 4,500