XML 51 R36.htm IDEA: XBRL DOCUMENT v3.25.4

Securities Available for Sale and Held to Maturity (Tables)

12 Months Ended

Dec. 31, 2025

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, 2025 and 2024 ($ 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, 2025		Cost				Gains				Losses				Value				Cost				Gains				Losses				Value
U.S. Treasury securities		$	205,282			$	3,666			$	—			$	208,948			$	30,615			$	185			$	—			$	30,800
U.S. Government agency obligations			70,924				609				(684	)			70,849				—				—				—				—
Mortgage-backed securities
Residential mortgage pass-through    securities
Guaranteed by GNMA			40,425				106				(1,996	)			38,535				13,154				22				(393	)			12,783
Issued by FNMA and FHLMC			1,165,292				33,836				(11,369	)			1,187,759				372,311				2,070				(7,812	)			366,569
Other residential mortgage-backed    securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			—				—				—				—				96,667				—				(4,233	)			92,434
Commercial mortgage-backed securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			360,521				10,698				(480	)			370,739				694,707				73				(16,797	)			677,983
Total		$	1,842,444			$	48,915			$	(14,529	)		$	1,876,830			$	1,207,454			$	2,350			$	(29,235	)		$	1,180,569
December 31, 2024
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,    FHLMC or GNMA			—				—				—				—				123,685				—				(8,004	)			115,681
Commercial mortgage-backed securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			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

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, 2025 and 2024 ($ in thousands):

		December 31,
		2025				2024
Aaa		$	52,405			$	1,335,385
Aa1 to Aa3			1,155,049				—
Total		$	1,207,454			$	1,335,385

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, 2025 and 2024 ($ in thousands):

		Less than 12 Months								12 Months or More								Total
						Gross								Gross								Gross
		Estimated				Unrealized				Estimated				Unrealized				Estimated				Unrealized
December 31, 2025		Fair Value				Losses				Fair Value				Losses				Fair Value				Losses
U.S. Government agency obligations		$	3,905			$	(14	)		$	40,952			$	(670	)		$	44,857			$	(684	)
Mortgage-backed securities
Residential mortgage pass-through    securities
Guaranteed by GNMA			5,925				(18	)			26,946				(2,371	)			32,871				(2,389	)
Issued by FNMA and FHLMC			91,230				(234	)			205,163				(18,947	)			296,393				(19,181	)
Other residential mortgage-backed    securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			—				—				92,434				(4,233	)			92,434				(4,233	)
Commercial mortgage-backed    securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			—				—				739,436				(17,277	)			739,436				(17,277	)
Total		$	101,060			$	(266	)		$	1,104,931			$	(43,498	)		$	1,205,991			$	(43,764	)
December 31, 2024
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    securities
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    securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			—				—				115,681				(8,004	)			115,681				(8,004	)
Commercial mortgage-backed    securities
Issued or guaranteed by FNMA,    FHLMC or GNMA			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	)

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		2025				2024				2023
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, 2025, 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		$	34,943			$	35,204			$	—			$	—
Due after one year through five years			27,717				28,119				30,615				30,800
Due after five years through ten years			213,546				216,474				—				—
			276,206				279,797				30,615				30,800
Mortgage-backed securities			1,566,238				1,597,033				1,176,839				1,149,769
Total		$	1,842,444			$	1,876,830			$	1,207,454			$	1,180,569

X

- Definition

Tabular disclosure of credit quality indicator for investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_DebtSecuritiesHeldToMaturityCreditQualityIndicatorTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of realized and unrealized gain (loss) on investment in security.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(9)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_GainLossOnInvestmentsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

No definition available.

+ Details

Name:	us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

+ References

No definition available.

+ Details

Name:	us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of unrealized gains and losses on investments.

+ References

No definition available.

+ Details

Name:	us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration