XML 106 R91.htm IDEA: XBRL DOCUMENT
v3.25.4

Other Real Estate - Other Real Estate, By Type of Property (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Other real estate [Line Items] |  |  |  |
Total other real estate | $ 6,957 | $ 5,917 | $ 6,867 | $ 1,986
Construction, Land Development And Other Land Properties [Member] |  |  |  |
Other real estate [Line Items] |  |  |  |
Total other real estate | 63 | 46 |  |
1 - 4 Family Residential Properties [Member] |  |  |  |
Other real estate [Line Items] |  |  |  |
Total other real estate | 3,871 | 2,260 |  |
Nonfarm, Nonresidential Properties [Member] |  |  |  |
Other real estate [Line Items] |  |  |  |
Total other real estate | 1,273 | 3,611 |  |
Other Real Estate Properties [Member] |  |  |  |
Other real estate [Line Items] |  |  |  |
Total other real estate | $ 1,750 | $ 0 |  |

X
- Definition Other real estate line items. + References No definition available. + Details
Name: | trmk_OtherRealEstateLineItems
Namespace Prefix: | trmk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_OtherRealEstateAndForeclosedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=trmk_ConstructionLandDevelopmentAndOtherLandPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=trmk_FamilyResidential14PropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=trmk_NonfarmNonresidentialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=trmk_OtherRealEstatePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |