XML 74 R66.htm IDEA: XBRL DOCUMENT
v3.25.2

LHFI and ACL, LHFI - Schedule of Amortized Cost Basis of Collateral-Dependent Loans by Class of Loans and Collateral Type (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | $ 39,500 | $ 37,140
Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 17,388 | 13,741
Vehicles [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 1,971 | 1,818
Miscellaneous [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 20,141 | 21,581
Other Secured by 1-4 Family Residential Properties [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 481 | 521
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 481 | 521
Secured by Nonfarm, Nonresidential Properties [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 426 | 9,783
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 426 | 9,783
Other Real Estate Secured [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 14,978 | 1,904
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 14,978 | 1,904
Secured by 1-4 Family Residential Properties [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 1,503 | 1,533
Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 1,503 | 1,533
Commercial and Industrial Loans [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 21,348 | 22,503
Commercial and Industrial Loans [Member] | Loans Secured by Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 0 | 0
Commercial and Industrial Loans [Member] | Vehicles [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 1,971 | 1,818
Commercial and Industrial Loans [Member] | Miscellaneous [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 19,377 | 20,685
Other Commercial Loans and Leases [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | 764 | 896
Other Commercial Loans and Leases [Member] | Miscellaneous [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Collateral-Dependent Loans | $ 764 | $ 896

X
- Definition Financing receivable collateral dependent loans. + References No definition available. + Details
Name: | trmk_FinancingReceivableCollateralDependentLoans
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=trmk_MiscellaneousMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=trmk_OtherResidentialFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=trmk_NonresidentialPropertiesFinancingReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=trmk_OtherRealEstateSecuredFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=trmk_ResidentialFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=trmk_OtherCommercialLoansAndLeasesFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |