$TRMK
Trustmark Corp Stock $trmk

$trmk Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000095017024015988 Filed on February 15, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$229.8M		$878.8M
YoY Change	15.56%		62.2%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.563M	$9.656M	$35.76M
YoY Change	11.7%	1.34%	-10.35%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$97.01M		$326.0M
YoY Change	58.24%		591.68%
% of Operating Profit
Other Income/Expense, Net	$3.632M		$11.19M
YoY Change	44.47%		13.67%
Pretax Income	$49.52M	$43.42M	$197.3M
YoY Change	-16.98%	-184.16%	167.59%
Income Tax	$7.982M	$7.297M	$31.85M
% Of Pretax Income	16.12%	16.81%	16.14%
Net Earnings	$41.54M	$36.12M	$165.5M
YoY Change	-17.43%	-206.05%	130.21%
Net Earnings / Revenue	18.07%		18.83%
Basic Earnings Per Share	$0.68		$2.71
Diluted Earnings Per Share	$0.68	$0.59	$2.70
COMMON SHARES
Basic Shares Outstanding	61.08M	61.07M	61.05M
Diluted Shares Outstanding	61.35M		61.23M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$606.3M	$975.5M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$269.6M	$270.7M	$270.7M
YoY Change	20.36%	8.85%	8.85%
Goodwill	$384.2M	$384.2M
YoY Change	0.0%	0.0%
Intangibles	$2.845M	$2.965M
YoY Change	-15.13%	-18.54%
Long-Term Investments
YoY Change
Other Assets			$1.197M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$18.38B	$18.72B	$18.72B
YoY Change	-2.65%	3.92%	3.92%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$40.19M	$41.58M	$41.58M
YoY Change	5.78%	6.81%	6.81%
Deferred Revenue
YoY Change
Short-Term Debt	$393.2M	$405.7M	$405.7M
YoY Change	-17.73%	-9.7%	-9.7%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$433.4M	$447.3M	$447.3M
YoY Change	-16.0%	1049.0%	1049.0%
LONG-TERM LIABILITIES
Long-Term Debt	$667.4M	$668.6M	$668.6M
YoY Change	-60.04%	-45.91%	-45.91%
Other Long-Term Liabilities	$254.6M	$374.7M	$374.7M
YoY Change	-26.21%	3.72%	3.72%
Total Long-Term Liabilities	$922.1M	$1.043B	$1.043B
YoY Change	-54.25%	-34.69%	-34.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$433.4M	$447.3M	$447.3M
Total Long-Term Liabilities	$922.1M	$1.043B	$1.043B
Total Liabilities	$16.69B	$17.06B	$17.06B
YoY Change	-3.59%	3.25%	3.25%
SHAREHOLDERS EQUITY
Retained Earnings	$1.736B	$1.709B
YoY Change	6.11%	6.8%
Common Stock	$173.3M	$172.4M
YoY Change	3.13%	3.03%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.683B	$1.662B	$1.662B
YoY Change
Total Liabilities & Shareholders Equity	$18.38B	$18.72B	$18.72B
YoY Change	-2.65%	3.92%	3.92%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$41.54M	$36.12M	$165.5M
YoY Change	-17.43%	-206.05%	130.21%
Depreciation, Depletion And Amortization	$8.563M	$9.656M	$35.76M
YoY Change	11.7%	1.34%	-10.35%
Cash From Operating Activities	-$58.54M	$64.19M	$196.9M
YoY Change	-2387.73%	-5.68%	-33.6%
INVESTING ACTIVITIES
Capital Expenditures	$5.050M	$8.057M	$40.08M
YoY Change	-70.46%	2.39%	50.55%
Acquisitions
YoY Change
Other Investing Activities	-$44.22M	-$43.62M	-$362.5M
YoY Change	-80.73%	-91.81%	-83.86%
Cash From Investing Activities	-$51.31M	-$51.67M	-$411.2M
YoY Change	-79.42%	-90.44%	-81.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-259.4M	212.5M	455.0M
YoY Change	-132.06%	-70.79%	0.71%
NET CHANGE
Cash From Operating Activities	-58.54M	64.19M	196.9M
Cash From Investing Activities	-51.31M	-51.67M	-411.2M
Cash From Financing Activities	-259.4M	212.5M	455.0M
Net Change In Cash	-369.3M	225.1M	240.8M
YoY Change	-165.67%	-11.79%	-115.71%
FREE CASH FLOW
Cash From Operating Activities	-$58.54M	$64.19M	$196.9M
Capital Expenditures	$5.050M	$8.057M	$40.08M
Free Cash Flow	-$63.59M	$56.13M	$156.8M
YoY Change	337.49%	-6.73%	-41.9%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2023	dei	Amendment Flag AmendmentFlag	false
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CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
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CY2023	dei	Entity File Number EntityFileNumber	000-3683
CY2023	dei	Entity Registrant Name EntityRegistrantName	TRUSTMARK CORP
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MS
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	64-0471500
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	248 East Capitol Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Jackson
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	MS
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CY2023	dei	City Area Code CityAreaCode	601
CY2023	dei	Local Phone Number LocalPhoneNumber	208-5111
CY2023	dei	Security12b Title Security12bTitle	Common Stock, no par value
CY2023	dei	Trading Symbol TradingSymbol	TRMK
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	18722189000
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	18015478000
CY2023	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	775309000
CY2022	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	472990000
CY2021	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	363772000
CY2023	trmk	Interest And Fee Income On Paycheck Protection Program Loans InterestAndFeeIncomeOnPaycheckProtectionProgramLoans	0
CY2022	trmk	Interest And Fee Income On Paycheck Protection Program Loans InterestAndFeeIncomeOnPaycheckProtectionProgramLoans	639000
CY2021	trmk	Interest And Fee Income On Paycheck Protection Program Loans InterestAndFeeIncomeOnPaycheckProtectionProgramLoans	36726000
CY2023	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	66100000
CY2022	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	59717000
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	38698000
CY2023	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	37135000
CY2022	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	8080000
CY2021	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2767000
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	878832000
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	541833000
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	442511000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	245951000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	29069000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	16945000
CY2023	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	20419000
CY2022	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	6127000
CY2021	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	232000
CY2023	us-gaap	Interest Expense Other InterestExpenseOther	59584000
CY2022	us-gaap	Interest Expense Other InterestExpenseOther	11929000
CY2021	us-gaap	Interest Expense Other InterestExpenseOther	6983000
CY2023	us-gaap	Interest Expense InterestExpense	325954000
CY2022	us-gaap	Interest Expense InterestExpense	47125000
CY2021	us-gaap	Interest Expense InterestExpense	24160000
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	552878000
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	494708000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	418351000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	27362000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	21677000
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-21499000
CY2023	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-2781000
CY2022	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	1215000
CY2021	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-2949000
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	528297000
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	471816000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	442799000
CY2023	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	43416000
CY2022	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	42157000
CY2021	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	33246000
CY2023	trmk	General Banking Other GeneralBankingOther	33439000
CY2022	trmk	General Banking Other GeneralBankingOther	36105000
CY2021	trmk	General Banking Other GeneralBankingOther	34662000
CY2023	trmk	Mortgage Banking Income MortgageBankingIncome	26216000
CY2022	trmk	Mortgage Banking Income MortgageBankingIncome	28306000
CY2021	trmk	Mortgage Banking Income MortgageBankingIncome	63750000
CY2023	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	57569000
CY2022	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	53721000
CY2021	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	48511000
CY2023	trmk	Wealth Management Income WealthManagementIncome	35092000
CY2022	trmk	Wealth Management Income WealthManagementIncome	35013000
CY2021	trmk	Wealth Management Income WealthManagementIncome	35190000
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	11187000
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	9842000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	6551000
CY2023	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	39000
CY2022	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0
CY2023	us-gaap	Noninterest Income NoninterestIncome	206958000
CY2022	us-gaap	Noninterest Income NoninterestIncome	205144000
CY2021	us-gaap	Noninterest Income NoninterestIncome	221910000
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	304665000
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	287440000
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	284158000
CY2023	trmk	Services And Fees ServicesAndFees	109478000
CY2022	trmk	Services And Fees ServicesAndFees	105469000
CY2021	trmk	Services And Fees ServicesAndFees	92282000
CY2023	us-gaap	Occupancy Net OccupancyNet	29482000
CY2022	us-gaap	Occupancy Net OccupancyNet	29264000
CY2021	us-gaap	Occupancy Net OccupancyNet	27043000
CY2023	us-gaap	Equipment Expense EquipmentExpense	26142000
CY2022	us-gaap	Equipment Expense EquipmentExpense	24448000
CY2021	us-gaap	Equipment Expense EquipmentExpense	24337000
CY2023	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	6500000
CY2022	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	100750000
CY2021	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0
CY2023	us-gaap	Other Noninterest Expense OtherNoninterestExpense	61652000
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	55842000
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	61476000
CY2023	us-gaap	Noninterest Expense NoninterestExpense	537919000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	603213000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	489296000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	197336000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	73747000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	175413000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31847000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1860000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28048000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	165489000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	71887000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	147365000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.71
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.35
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.7
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.17
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.34
CY2023	us-gaap	Net Income Loss NetIncomeLoss	165489000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	71887000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	147365000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	38133000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-172143000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-37090000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	29000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0
CY2023	trmk	Other Comprehensive Income Loss Transfers From Available For Sale To Held To Maturity Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	11668000
CY2022	trmk	Other Comprehensive Income Loss Transfers From Available For Sale To Held To Maturity Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	-64525000
CY2021	trmk	Other Comprehensive Income Loss Transfers From Available For Sale To Held To Maturity Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	1985000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-518000
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	8094000
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	2134000
CY2023	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	83000
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	83000
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	84000
CY2023	trmk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Post Retirement Benefit Plans For Net Loss Due To Lump Sum Settlements Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostRetirementBenefitPlansForNetLossDueToLumpSumSettlementsNetOfTax	19000
CY2022	trmk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Post Retirement Benefit Plans For Net Loss Due To Lump Sum Settlements Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostRetirementBenefitPlansForNetLossDueToLumpSumSettlementsNetOfTax	0
CY2021	trmk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Post Retirement Benefit Plans For Net Loss Due To Lump Sum Settlements Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostRetirementBenefitPlansForNetLossDueToLumpSumSettlementsNetOfTax	137000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-133000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-817000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1241000
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-6098000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-15514000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-12289000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-345000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	55680000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-242843000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-31509000
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	221169000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-170956000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	115856000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1741117000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	147365000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-31509000
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.92
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	58085000
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1379000
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	61799000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	5601000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1741311000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	71887000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-242843000
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.92
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	56679000
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.92
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	56653000
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1092000
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	6155000
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1687000
CY2022	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	24604000
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	4883000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1492268000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	165489000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	55680000
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1661847000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	165489000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	71887000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	147365000
CY2023	trmk	Provision Reversal For Loan Lease And Other Losses ProvisionReversalForLoanLeaseAndOtherLosses	24581000
CY2022	trmk	Provision Reversal For Loan Lease And Other Losses ProvisionReversalForLoanLeaseAndOtherLosses	22892000
CY2021	trmk	Provision Reversal For Loan Lease And Other Losses ProvisionReversalForLoanLeaseAndOtherLosses	-24448000
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	35756000
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	39882000
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	45813000
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6140000
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-11206000
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-20310000
CY2023	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	39000
CY2022	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0
CY2023	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	13599000
CY2022	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	24914000
CY2021	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	70954000
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	6155000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	4883000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	5601000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4800000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-16800000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	20115000
CY2023	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1149609000
CY2022	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1267967000
CY2021	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	2357108000
CY2023	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1177563000
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1116232000
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	2171605000
CY2023	trmk	Mortgage Servicing Rights Net MortgageServicingRightsNet	13712000
CY2022	trmk	Mortgage Servicing Rights Net MortgageServicingRightsNet	17843000
CY2021	trmk	Mortgage Servicing Rights Net MortgageServicingRightsNet	28125000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	5244000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4875000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4853000
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11454000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	51921000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-42400000
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	34376000
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	167743000
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	19645000
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1192000
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	57359000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	196887000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	296516000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	348771000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	103051000
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	9601000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	136135000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	197091000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	301344000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	435386000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	835200000
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	4796000
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2023	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	19491000
CY2022	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	604938000
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	230527000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2150935000
CY2023	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	46000
CY2022	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	-288000
CY2021	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	-1772000
CY2023	us-gaap	Proceeds From Payments For Federal Funds Sold And Securities Purchased Under Agreements To Resell Net ProceedsFromPaymentsForFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResellNet	4000000
CY2022	us-gaap	Proceeds From Payments For Federal Funds Sold And Securities Purchased Under Agreements To Resell Net ProceedsFromPaymentsForFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResellNet	-4000000
CY2021	us-gaap	Proceeds From Payments For Federal Funds Sold And Securities Purchased Under Agreements To Resell Net ProceedsFromPaymentsForFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResellNet	50000
CY2023	trmk	Decrease Increase In Member Bank Stock DecreaseIncreaseInMemberBankStock	-17830000
CY2022	trmk	Decrease Increase In Member Bank Stock DecreaseIncreaseInMemberBankStock	39329000
CY2021	trmk	Decrease Increase In Member Bank Stock DecreaseIncreaseInMemberBankStock	1220000
CY2023	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	761931000
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1925327000
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	197800000
CY2023	trmk	Proceeds From Sales Of Paycheck Protection Program Loans ProceedsFromSalesOfPaycheckProtectionProgramLoans	0
CY2022	trmk	Proceeds From Sales Of Paycheck Protection Program Loans ProceedsFromSalesOfPaycheckProtectionProgramLoans	0
CY2021	trmk	Proceeds From Sales Of Paycheck Protection Program Loans ProceedsFromSalesOfPaycheckProtectionProgramLoans	353287000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	40082000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	26624000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	27360000
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1863000
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	5107000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	961000
CY2023	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2410000
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	3136000
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	5064000
CY2023	us-gaap	Payments For Software PaymentsForSoftware	8575000
CY2022	us-gaap	Payments For Software PaymentsForSoftware	7388000
CY2021	us-gaap	Payments For Software PaymentsForSoftware	3836000
CY2023	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	16343000
CY2022	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	22321000
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	17288000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-411174000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2280402000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1005014000
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1132115000
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-649512000
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1038396000
CY2023	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-43586000
CY2022	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	210754000
CY2021	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	74058000
CY2023	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-575020000
CY2022	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	974981000
CY2021	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-19189000
CY2023	trmk	Payments Under Financing Lease Obligations PaymentsUnderFinancingLeaseObligations	721000
CY2022	trmk	Payments Under Financing Lease Obligations PaymentsUnderFinancingLeaseObligations	1409000
CY2021	trmk	Payments Under Financing Lease Obligations PaymentsUnderFinancingLeaseObligations	1434000
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	56653000
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	56679000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	58085000
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24604000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	61799000
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1092000
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1687000
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1379000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	455043000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	451844000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	970568000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	240756000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1532042000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	314325000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	734787000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2266829000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1952504000
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	975543000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	734787000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2266829000
CY2023	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Business</span></p><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 (includes the Georgia Loan Production Office), Florida, Mississippi, Tennessee and Texas.</span></p>
CY2023	trmk	Optional Repurchase Program Principal Percentage To Be Repurchased OptionalRepurchaseProgramPrincipalPercentageToBeRepurchased	1
CY2023	trmk	Term Of Loan Is Contractually Past Due To Classify As Past Due Loan TermOfLoanIsContractuallyPastDueToClassifyAsPastDueLoan	P30D
CY2023Q4	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P20Y
CY2023Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	54400000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	72200000
CY2023	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0
CY2022	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0
CY2021	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0
CY2023	trmk	Number Of Types Of Interchange Fees NumberOfTypesOfInterchangeFees	2
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-145000
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1000000
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1900000
CY2023	trmk	Number Of Trust Management Revenue Categories NumberOfTrustManagementRevenueCategories	5
CY2023	trmk	Time Period Between Service Obligation Completed And Payment Received From Trust Customer TimePeriodBetweenServiceObligationCompletedAndPaymentReceivedFromTrustCustomer	P30D
CY2023	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Derivative Financial Instruments</span></p><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p><p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Derivatives Designated as Hedging Instruments</span></p><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">FASB ASC Topic 815, </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Derivatives and Hedging</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> (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.</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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).</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p><p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Derivatives Not Designated as Hedging Instruments</span></p><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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, “Loans Held for Sale (LHFS)” for information regarding the fair value option election.</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p><p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p>
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	38803000
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	2701000
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	15259000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	306568000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	45275000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	24429000
CY2023	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	7237000
CY2022	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	1533000
CY2021	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	770000
CY2023	trmk	Securities Transferred From Available For Sale To Held To Maturity SecuritiesTransferredFromAvailableForSaleToHeldToMaturity	0
CY2022	trmk	Securities Transferred From Available For Sale To Held To Maturity SecuritiesTransferredFromAvailableForSaleToHeldToMaturity	674092000
CY2021	trmk	Securities Transferred From Available For Sale To Held To Maturity SecuritiesTransferredFromAvailableForSaleToHeldToMaturity	0
CY2023	trmk	Investment In Tax Credit Partnership Not Funded InvestmentInTaxCreditPartnershipNotFunded	3202000
CY2022	trmk	Investment In Tax Credit Partnership Not Funded InvestmentInTaxCreditPartnershipNotFunded	18891000
CY2021	trmk	Investment In Tax Credit Partnership Not Funded InvestmentInTaxCreditPartnershipNotFunded	10647000
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	92000
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7303000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6912000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9666000
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	61054000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	61242000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62788000
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	177000
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	190000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	185000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61231000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61432000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62973000
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	23000
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	-8000
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1959007000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	37000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	196166000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1762878000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1426279000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	51000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	70826000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1355504000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	2270709000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	380000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	247007000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2024082000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1494514000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	37000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	87962000
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1406589000
CY2022Q4	trmk	Reclassification Of Available For Sale To Held To Maturity Securities ReclassificationOfAvailableForSaleToHeldToMaturitySecurities	766000000
CY2022Q4	trmk	Other Comprehensive Income Loss Unrealized Holding Gain Loss On Securities Arising During Period Before Tax At Date Of Transfer OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTaxAtDateOfTransfer	91900000
CY2022Q4	trmk	Other Comprehensive Income Loss Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax At Date Of Transfer OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTaxAtDateOfTransfer	68900000
CY2023Q4	trmk	Accumulated Other Comprehensive Income Loss Transferred Securities Adjustment AccumulatedOtherComprehensiveIncomeLossTransferredSecuritiesAdjustment	57600000
CY2022Q4	trmk	Accumulated Other Comprehensive Income Loss Transferred Securities Adjustment AccumulatedOtherComprehensiveIncomeLossTransferredSecuritiesAdjustment	69200000
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0
CY2023Q4	trmk	Pledged Collateralize Deposits And Securities Sold Under Repurchase Agreements PledgedCollateralizeDepositsAndSecuritiesSoldUnderRepurchaseAgreements	2321000000
CY2022Q4	trmk	Pledged Collateralize Deposits And Securities Sold Under Repurchase Agreements PledgedCollateralizeDepositsAndSecuritiesSoldUnderRepurchaseAgreements	2693000000
CY2023Q4	trmk	Pledged Securities Providing Additional Contingency Funding PledgedSecuritiesProvidingAdditionalContingencyFunding	0
CY2022Q4	trmk	Pledged Securities Providing Additional Contingency Funding PledgedSecuritiesProvidingAdditionalContingencyFunding	0
CY2023Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2023	trmk	Potential Credit Loss Exposure PotentialCreditLossExposure	340000
CY2022	trmk	Potential Credit Loss Exposure PotentialCreditLossExposure	4500000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1426279000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1494514000
CY2023Q4	trmk	Estimated Fair Value Less Than12 Months EstimatedFairValueLessThan12Months	349545000
CY2023	trmk	Gross Unrealized Losses Less Than12 Months GrossUnrealizedLossesLessThan12Months	3485000
CY2023Q4	trmk	Estimated Fair Value12 Months Or More EstimatedFairValue12MonthsOrMore	2758879000
CY2023	trmk	Gross Unrealized Losses12 Months Or More GrossUnrealizedLosses12MonthsOrMore	263507000
CY2023Q4	trmk	Total Estimated Fair Value TotalEstimatedFairValue	3108424000
CY2023	trmk	Total Gross Unrealized Losses TotalGrossUnrealizedLosses	266992000
CY2022Q4	trmk	Estimated Fair Value Less Than12 Months EstimatedFairValueLessThan12Months	2078165000
CY2022	trmk	Gross Unrealized Losses Less Than12 Months GrossUnrealizedLossesLessThan12Months	130121000
CY2022Q4	trmk	Estimated Fair Value12 Months Or More EstimatedFairValue12MonthsOrMore	1342186000
CY2022	trmk	Gross Unrealized Losses12 Months Or More GrossUnrealizedLosses12MonthsOrMore	204848000
CY2022Q4	trmk	Total Estimated Fair Value TotalEstimatedFairValue	3420351000
CY2022	trmk	Total Gross Unrealized Losses TotalGrossUnrealizedLosses	334969000
CY2023	trmk	Proceeds From Calls And Sales Of Securities ProceedsFromCallsAndSalesOfSecurities	4796000
CY2022	trmk	Proceeds From Calls And Sales Of Securities ProceedsFromCallsAndSalesOfSecurities	0
CY2021	trmk	Proceeds From Calls And Sales Of Securities ProceedsFromCallsAndSalesOfSecurities	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	47000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	65199000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	63501000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	340000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	340000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	331225000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	309108000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	29068000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	29042000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2356000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2151000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	3606000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	3400000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	0
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0
CY2023Q4	trmk	Available For Sale Debt Securities Amortized Cost Before Mortgage Backed Securities AvailableForSaleDebtSecuritiesAmortizedCostBeforeMortgageBackedSecurities	402386000
CY2023Q4	trmk	Fair Value Of Available For Sale Securities Before Mortgage Back Securities FairValueOfAvailableForSaleSecuritiesBeforeMortgageBackSecurities	378160000
CY2023Q4	trmk	Amortized Cost Held To Maturity Before Mortgage Backed Securities AmortizedCostHeldToMaturityBeforeMortgageBackedSecurities	29408000
CY2023Q4	trmk	Fair Value Of Held To Maturity Securities Before Mortgage Back Securities FairValueOfHeldToMaturitySecuritiesBeforeMortgageBackSecurities	29382000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1556621000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	1384718000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	1396871000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	1326122000
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1959007000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1762878000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1426279000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1355504000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12950524000
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12204039000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	139367000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2023Q4	us-gaap	Notes Receivable Net NotesReceivableNet	12811157000
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	12083825000
CY2023Q4	trmk	Loans And Leases Receivable Accrual Of Interest LoansAndLeasesReceivableAccrualOfInterest	71000000
CY2022Q4	trmk	Loans And Leases Receivable Accrual Of Interest LoansAndLeasesReceivableAccrualOfInterest	50700000
CY2023	trmk	Concentration Risk Credit Risk Financial Instrument Maximum Exposure Percentage ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposurePercentage	0.10
CY2023Q4	trmk	Key Market Regions In Qualitative Reserve Allocation KeyMarketRegionsInQualitativeReserveAllocation	5
CY2023Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	41100000
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	47000000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	287400000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	293200000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	0
CY2023Q4	trmk	Financing Receivable Recorded Investment Nonaccrual With No Acl FinancingReceivableRecordedInvestmentNonaccrualWithNoACL	27092000
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	100008000
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	5790000
CY2022Q4	trmk	Financing Receivable Recorded Investment Nonaccrual With No Acl FinancingReceivableRecordedInvestmentNonaccrualWithNoACL	21094000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	65972000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	3929000
CY2023Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	12950524000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	12204039000
CY2023Q4	trmk	Financing Receivable Collateral Dependent Loans FinancingReceivableCollateralDependentLoans	49082000
CY2022Q4	trmk	Financing Receivable Collateral Dependent Loans FinancingReceivableCollateralDependentLoans	40288000
CY2023	trmk	Number Of Key Quality Ratios NumberOfKeyQualityRatios	6
CY2023Q4	trmk	Exposure For Commercial Non Accrual Loans To Be Reviewed On Individual Basis ExposureForCommercialNonAccrualLoansToBeReviewedOnIndividualBasis	500000
CY2023Q4	trmk	Exposure For Modified Commercial Accrual Loans Deemed To Be Reviewed On Individual Basis ExposureForModifiedCommercialAccrualLoansDeemedToBeReviewedOnIndividualBasis	500000
CY2023Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	2557360000
CY2023Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	3821836000
CY2023Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	2060977000
CY2023Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1267991000
CY2023Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	662502000
CY2023Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	1121424000
CY2023Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	1458434000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12950524000
CY2022Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	4259096000
CY2022Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	2453559000
CY2022Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	1652970000
CY2022Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	824439000
CY2022Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	354522000
CY2022Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	1110471000
CY2022Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	1548982000
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12204039000
CY2023	trmk	Term Of Past Due Used In Evaluating Collateral Exceptions TermOfPastDueUsedInEvaluatingCollateralExceptions	P90D
CY2023Q4	trmk	Covered Serviced Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due CoveredServicedFinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	51200000
CY2022Q4	trmk	Covered Serviced Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due CoveredServicedFinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	49300000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	12403000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	126964000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	139367000
CY2023Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	49082000
CY2023Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	12901442000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12950524000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	17687000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	102527000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	40288000
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	12163751000
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12204039000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	99457000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	117306000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	17515000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	11332000
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	10275000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	9306000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	10412000
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	13925000
CY2023	trmk	Financing Receivable Allowance For Credit Losses Write Offs Recoveries Net FinancingReceivableAllowanceForCreditLossesWriteOffsRecoveriesNet	8209000
CY2022	trmk	Financing Receivable Allowance For Credit Losses Write Offs Recoveries Net FinancingReceivableAllowanceForCreditLossesWriteOffsRecoveriesNet	920000
CY2021	trmk	Financing Receivable Allowance For Credit Losses Write Offs Recoveries Net FinancingReceivableAllowanceForCreditLossesWriteOffsRecoveriesNet	-3650000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	27362000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	21677000
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-21499000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	139367000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	99457000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	17515000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	9306000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	27362000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	139367000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	99457000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	11332000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	10412000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	21677000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	120214000
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	516545000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	490213000
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	288956000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	282385000
CY2023Q4	trmk	Premises And Equipment Net PremisesAndEquipmentNet	227589000
CY2022Q4	trmk	Premises And Equipment Net PremisesAndEquipmentNet	207828000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	3751000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	4537000
CY2023Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	1197000
CY2022Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	0
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	232537000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	212365000
CY2023Q4	trmk	Number Of Property Held For Sale NumberOfPropertyHeldForSale	3
CY2022Q4	trmk	Number Of Property Held For Sale NumberOfPropertyHeldForSale	0
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	470000
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	400000
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	140000
CY2023	trmk	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	17400000
CY2022	trmk	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	16200000
CY2021	trmk	Depreciation And Amortization Of Premises And Equipment DepreciationAndAmortizationOfPremisesAndEquipment	15600000
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	129677000
CY2021Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	87687000
CY2021Q4	us-gaap	Goodwill Goodwill	384237000
CY2023	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	13712000
CY2022	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	17843000
CY2023	us-gaap	Asset At Fair Value Changes In Fair Value Resulting From Changes In Assumptions AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions	1489000
CY2022	us-gaap	Asset At Fair Value Changes In Fair Value Resulting From Changes In Assumptions AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions	38181000
CY2023	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs	-10030000
CY2022	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs	-14034000
CY2023Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	131870000
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	129677000
CY2023	trmk	Assumed Average Prepayment Speed AssumedAveragePrepaymentSpeed	9
CY2023	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1007
CY2022	trmk	Assumed Average Prepayment Speed AssumedAveragePrepaymentSpeed	8
CY2022	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1008
CY2023	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	1136000000
CY2022	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	1243000000
CY2021	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	2286000000
CY2023	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	15300000
CY2022	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	20200000
CY2021	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	56000000
CY2023	trmk	Servicing Fee Income Percentage Of Outstanding Balance Of Underlying Loans ServicingFeeIncomePercentageOfOutstandingBalanceOfUnderlyingLoans	0.0032
CY2023	trmk	Mortgage Servicing Fee Income MortgageServicingFeeIncome	26900000
CY2022	trmk	Mortgage Servicing Fee Income MortgageServicingFeeIncome	26000000
CY2021	trmk	Mortgage Servicing Fee Income MortgageServicingFeeIncome	25100000
CY2023Q4	trmk	Mortgage Loan Sold And Serviced For Others MortgageLoanSoldAndServicedForOthers	8477375000
CY2022Q4	trmk	Mortgage Loan Sold And Serviced For Others MortgageLoanSoldAndServicedForOthers	8115824000
CY2023	trmk	Period Of Putback Response PeriodOfPutbackResponse	P60D
CY2023Q4	us-gaap	Mortgage Loans On Real Estate Writedown Or Reserve Amount1 MortgageLoansOnRealEstateWritedownOrReserveAmount1	500000
CY2022Q4	us-gaap	Mortgage Loans On Real Estate Writedown Or Reserve Amount1 MortgageLoansOnRealEstateWritedownOrReserveAmount1	500000
CY2022	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0
CY2022Q4	us-gaap	Goodwill Goodwill	384237000
CY2023	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0
CY2023Q4	us-gaap	Goodwill Goodwill	384237000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	106271000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	103306000
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2965000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	106271000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	102631000
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3640000
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	675000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1400000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2300000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	469000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	403000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	341000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	283000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	250000
CY2023	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0
CY2022	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0
CY2021	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2965000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P13Y10M24D
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	1986000
CY2021Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4557000
CY2020Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	11651000
CY2023	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	7237000
CY2022	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	1533000
CY2021	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	770000
CY2023	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	2555000
CY2022	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	4142000
CY2021	us-gaap	Real Estate Other Deductions RealEstateOtherDeductions	6932000
CY2023	trmk	Write Downs On Real Estate Excluding Covered Real Estate WriteDownsOnRealEstateExcludingCoveredRealEstate	199000
CY2022	trmk	Write Downs On Real Estate Excluding Covered Real Estate WriteDownsOnRealEstateExcludingCoveredRealEstate	38000
CY2021	trmk	Write Downs On Real Estate Excluding Covered Real Estate WriteDownsOnRealEstateExcludingCoveredRealEstate	932000
CY2023Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	6867000
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	1986000
CY2021Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4557000
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-145000
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1006000
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1869000
CY2023Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	6867000
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	1986000
CY2023Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	6867000
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	1986000
CY2023Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2000000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1100000
CY2023Q4	us-gaap	Foreclosed Assets ForeclosedAssets	6400000
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2900000
CY2023	trmk	Interest Income From Its Sales Type And Direct Financing Leases InterestIncomeFromItsSalesTypeAndDirectFinancingLeases	3200000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable SalesTypeAndDirectFinancingLeasesLeaseReceivable	161319000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Undiscounted Excess Amount SalesTypeAndDirectFinancingLeasesLeaseReceivableUndiscountedExcessAmount	29011000
CY2023Q4	trmk	Sales Type And Direct Financing Leases Initial Direct Costs SalesTypeAndDirectFinancingLeasesInitialDirectCosts	1326000
CY2023Q4	us-gaap	Direct Financing Lease Unguaranteed Residual Asset DirectFinancingLeaseUnguaranteedResidualAsset	4101000
CY2023Q4	us-gaap	Direct Financing Lease Net Investment In Lease DirectFinancingLeaseNetInvestmentInLease	137735000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Next Twelve Months SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths	24647000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Two Years SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears	25617000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Three Years SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears	24176000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Four Years SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears	36295000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Five Years SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears	21141000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received Thereafter SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter	29443000
CY2023Q4	us-gaap	Sales Type And Direct Financing Leases Lease Receivable Payments To Be Received SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived	161319000
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	786000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1479000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1546000
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	163000
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	188000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	219000
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	5311000
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	5172000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	5275000
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	277000
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	389000
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	463000
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	906000
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	1150000
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	1234000
CY2023	us-gaap	Sublease Income SubleaseIncome	12000
CY2022	us-gaap	Sublease Income SubleaseIncome	168000
CY2021	us-gaap	Sublease Income SubleaseIncome	350000
CY2023	us-gaap	Lease Cost LeaseCost	7431000
CY2022	us-gaap	Lease Cost LeaseCost	8210000
CY2021	us-gaap	Lease Cost LeaseCost	8387000
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	163000
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	188000
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	219000
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	721000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1409000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1434000
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	4188000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	4829000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	4781000
CY2023	us-gaap	Variable Lease Payment VariableLeasePayment	3643000
CY2022	us-gaap	Variable Lease Payment VariableLeasePayment	4009000
CY2021	us-gaap	Variable Lease Payment VariableLeasePayment	3948000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	3751000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	4537000
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4334000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5055000
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	38142000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	36301000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	41584000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	38932000
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P8Y4M2D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P8Y8M19D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y1M17D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y7M20D
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0361
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0349
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0364
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0322
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	573000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5051000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	584000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5119000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	589000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4967000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	594000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5020000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	599000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4860000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	2086000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	25452000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	5025000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	50469000
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	691000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	8885000
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4334000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	41584000
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	3197620000
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4093771000
CY2023Q4	trmk	Interest Bearing Demand Deposit InterestBearingDemandDeposit	4947626000
CY2022Q4	trmk	Interest Bearing Demand Deposit InterestBearingDemandDeposit	4773219000
CY2023Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	4047853000
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	4282435000
CY2023Q4	us-gaap	Time Deposits TimeDeposits	3376664000
CY2022Q4	us-gaap	Time Deposits TimeDeposits	1288223000
CY2023Q4	us-gaap	Deposits Deposits	15569763000
CY2022Q4	us-gaap	Deposits Deposits	14437648000
CY2023	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	121138000
CY2022	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	16409000
CY2021	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	4906000
CY2023	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	28605000
CY2022	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	9654000
CY2021	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	7912000
CY2023	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	96208000
CY2022	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	3006000
CY2021	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	4127000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	245951000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	29069000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	16945000
CY2023Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	822400000
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	247200000
CY2023Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	3199607000
CY2023Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	142607000
CY2023Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	19632000
CY2023Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	7433000
CY2023Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	5503000
CY2023Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	1882000
CY2023Q4	us-gaap	Time Deposits TimeDeposits	3376664000
CY2023Q4	trmk	Interest Bearing Deposits With No Stated Maturity InterestBearingDepositsWithNoStatedMaturity	8995479000
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	12372143000
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	61600000
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	102400000
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	29126000
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	64120000
CY2023Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	400058000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	975078000
CY2023Q4	trmk	Loans Available For Repurchase LoansAvailableForRepurchase	78838000
CY2022Q4	trmk	Loans Available For Repurchase LoansAvailableForRepurchase	70805000
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4334000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5055000
CY2023Q4	us-gaap	Other Borrowings OtherBorrowings	483230000
CY2022Q4	us-gaap	Other Borrowings OtherBorrowings	1050938000
CY2023	us-gaap	Debt Instrument Term DebtInstrumentTerm	P9D
CY2023Q4	trmk	Weighted Average Cost Related To Fhlb Advances WeightedAverageCostRelatedToFHLBAdvances	0.0554
CY2022	us-gaap	Debt Instrument Term DebtInstrumentTerm	P10D
CY2022Q4	trmk	Weighted Average Cost Related To Fhlb Advances WeightedAverageCostRelatedToFHLBAdvances	0.0458
CY2023	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	43416000
CY2022	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	42157000
CY2021	trmk	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	33246000
CY2023	trmk	General Banking Other GeneralBankingOther	33439000
CY2022	trmk	General Banking Other GeneralBankingOther	36105000
CY2021	trmk	General Banking Other GeneralBankingOther	34662000
CY2023	trmk	Mortgage Banking Income MortgageBankingIncome	26216000
CY2022	trmk	Mortgage Banking Income MortgageBankingIncome	28306000
CY2021	trmk	Mortgage Banking Income MortgageBankingIncome	63750000
CY2023	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	57569000
CY2022	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	53721000
CY2021	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	48511000
CY2023	trmk	Wealth Management Income WealthManagementIncome	35092000
CY2022	trmk	Wealth Management Income WealthManagementIncome	35013000
CY2021	trmk	Wealth Management Income WealthManagementIncome	35190000
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	11187000
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	9842000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	6551000
CY2023	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	39000
CY2023	us-gaap	Noninterest Income NoninterestIncome	206958000
CY2022	us-gaap	Noninterest Income NoninterestIncome	205144000
CY2021	us-gaap	Noninterest Income NoninterestIncome	221910000
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29450000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15377000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5815000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7197000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3283000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2118000
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3840000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-13440000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	16092000
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-960000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3360000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4023000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31847000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1860000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28048000
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	41441000
CY2023Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	2993000
CY2022Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	5056000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	15487000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	36837000
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	5521000
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	4419000
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3935000
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2104000
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	271000
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	106000
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5686000
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CY2023	dei	Auditor Firm AuditorFirmId	173

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$TRMK
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2024 Q1 Form 10-K Financial Statement

#000095017024015988 Filed on February 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

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$TRMK Trustmark Corp Stock $trmk

2024 Q1 Form 10-K Financial Statement

#000095017024015988 Filed on February 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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