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v2.4.1.9

Other Real Estate and Covered Other Real Estate (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 Market | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 15, 2013 | Mar. 16, 2012
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |
Balance at beginning of period | $ 106,539,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | $ 78,189,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | $ 79,053,000 us-gaap_OtherRealEstateAndForeclosedAssets |  |  |
Additions | 37,428,000 us-gaap_RealEstateOtherAdditions | [1] | 80,256,000 us-gaap_RealEstateOtherAdditions | [1] | 38,894,000 us-gaap_RealEstateOtherAdditions | [1] |  |
Disposals | (43,802,000)us-gaap_RealEstateOtherDeductions |  | (45,545,000)us-gaap_RealEstateOtherDeductions |  | (33,155,000)us-gaap_RealEstateOtherDeductions |  |  |
Write-downs | (7,656,000)trmk_WritedownsOnNonCoveredOtherAssets |  | (6,361,000)trmk_WritedownsOnNonCoveredOtherAssets |  | (6,603,000)trmk_WritedownsOnNonCoveredOtherAssets |  |  |
Balance at end of period | 92,509,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | 106,539,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | 78,189,000 us-gaap_OtherRealEstateAndForeclosedAssets |  |  |
Gain (loss), net on the sale of other real estate included in ORE/Foreclosure expense | 3,697,000 us-gaap_GainsLossesOnSalesOfInvestmentRealEstate |  | (881,000)us-gaap_GainsLossesOnSalesOfInvestmentRealEstate |  | (279,000)us-gaap_GainsLossesOnSalesOfInvestmentRealEstate |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 92,509,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | 106,539,000 us-gaap_OtherRealEstateAndForeclosedAssets |  | 78,189,000 us-gaap_OtherRealEstateAndForeclosedAssets |  |  |
Covered other real estate, beginning of period | 5,108,000 trmk_TotalCoveredOtherRealEstate |  | 5,741,000 trmk_TotalCoveredOtherRealEstate |  | 6,331,000 trmk_TotalCoveredOtherRealEstate |  |  |
Transfers from covered loans | 2,851,000 trmk_TransfersFromCoveredLoans |  | 1,934,000 trmk_TransfersFromCoveredLoans |  | 1,424,000 trmk_TransfersFromCoveredLoans |  |  |
FASB ASC 310-30 adjustment for the residual recorded investment | 136,000 trmk_IncreaseDecreaseCoveredOtherRealEstateAdjustments |  | (345,000)trmk_IncreaseDecreaseCoveredOtherRealEstateAdjustments |  | (112,000)trmk_IncreaseDecreaseCoveredOtherRealEstateAdjustments |  |  |
Net transfers from covered loans | 2,987,000 trmk_NetTransfersFromCoveredLoans |  | 1,589,000 trmk_NetTransfersFromCoveredLoans |  | 1,312,000 trmk_NetTransfersFromCoveredLoans |  |  |
Disposals | (1,232,000)trmk_Disposals |  | (1,442,000)trmk_Disposals |  | (1,631,000)trmk_Disposals |  |  |
Write-downs | (803,000)trmk_WritedownsOnCoveredOtherAssets |  | (780,000)trmk_WritedownsOnCoveredOtherAssets |  | (271,000)trmk_WritedownsOnCoveredOtherAssets |  |  |
Covered other real estate, end of period | 6,060,000 trmk_TotalCoveredOtherRealEstate |  | 5,108,000 trmk_TotalCoveredOtherRealEstate |  | 5,741,000 trmk_TotalCoveredOtherRealEstate |  |  |
Gain, net on the sale of covered other real estate included in ORE/Foreclosure expenses | 24,000 trmk_GainLossNetOnSaleOfCoveredOtherRealEstateIncludedInOreforeclosureExpenses |  | 119,000 trmk_GainLossNetOnSaleOfCoveredOtherRealEstateIncludedInOreforeclosureExpenses |  | 485,000 trmk_GainLossNetOnSaleOfCoveredOtherRealEstateIncludedInOreforeclosureExpenses |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Key market regions | 5 trmk_NumberOfKeyMarketRegion |  |  |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |
Total covered other real estate | 6,060,000 trmk_TotalCoveredOtherRealEstate |  | 5,108,000 trmk_TotalCoveredOtherRealEstate |  | 5,741,000 trmk_TotalCoveredOtherRealEstate |  |  |
Construction Land Development And Other Land Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Covered other real estate, end of period | 1,917,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember |  | 733,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |
Total covered other real estate | 1,917,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember |  | 733,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember |  |  |  |  |
1-4 Family Residential Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Covered other real estate, end of period | 1,103,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember |  | 1,981,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |
Total covered other real estate | 1,103,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember |  | 1,981,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember |  |  |  |  |
Nonfarm, Nonresidential Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Covered other real estate, end of period | 2,296,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember |  | 2,394,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |
Total covered other real estate | 2,296,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember |  | 2,394,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember |  |  |  |  |
Other Real Estate Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Covered other real estate, end of period | 744,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember |  | 0 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |
Total covered other real estate | 744,000 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember |  | 0 trmk_TotalCoveredOtherRealEstate / trmk_CoveredFinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember |  |  |  |  |
BancTrust Financial Group, Inc. [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisition, covered other real estate acquired |  |  |  |  |  |  | 40,100,000 trmk_BusinessAcquisitionCoveredOtherRealEstateAcquired / us-gaap_BusinessAcquisitionAxis = trmk_BanctrustFinancialGroupIncMember |
Bay Bank and Trust Company [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisition, covered other real estate acquired |  |  |  |  |  |  |  | 2,600,000 trmk_BusinessAcquisitionCoveredOtherRealEstateAcquired / us-gaap_BusinessAcquisitionAxis = trmk_BayBankAndTrustCompanyMember
Construction, Land Development And Other Land Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |
Balance at end of period | 61,015,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_ConstructionLandDevelopmentAndOtherLandLoansMember |  | 65,273,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_ConstructionLandDevelopmentAndOtherLandLoansMember |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 61,015,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_ConstructionLandDevelopmentAndOtherLandLoansMember |  | 65,273,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_ConstructionLandDevelopmentAndOtherLandLoansMember |  |  |  |  |
1 - 4 Family Residential Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |
Balance at end of period | 10,150,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_FamilyResidentialPropertiesMember |  | 14,696,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_FamilyResidentialPropertiesMember |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 10,150,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_FamilyResidentialPropertiesMember |  | 14,696,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_FamilyResidentialPropertiesMember |  |  |  |  |
Nonfarm, Nonresidential Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |
Balance at end of period | 19,696,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_NonfarmNonresidentialPropertiesMember |  | 26,433,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_NonfarmNonresidentialPropertiesMember |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 19,696,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_NonfarmNonresidentialPropertiesMember |  | 26,433,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_NonfarmNonresidentialPropertiesMember |  |  |  |  |
Other Real Estate Properties [Member] |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |
Balance at end of period | 1,648,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_OtherRealEstatePropertiesMember |  | 137,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_OtherRealEstatePropertiesMember |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | $ 1,648,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_OtherRealEstatePropertiesMember |  | $ 137,000 us-gaap_OtherRealEstateAndForeclosedAssets / trmk_OtherRealEstatePropertyTypeAxis = trmk_OtherRealEstatePropertiesMember |  |  |  |  |
[1] | Includes $40.1 million of other real estate acquired from BancTrust on February 15, 2013, and $2.6 million of other real estate acquired from Bay Bank on March 16, 2012.

X
- Definition The value of covered other real estate acquired in a business combination. + References No definition available. + Details
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- Definition Total other decrease (increase) in the carrying amount of covered real estate investments during the period other than cost of real estate sold. + References No definition available. + Details
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Balance Type: | credit
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X
- Definition The net gain (loss) resulting from sales and other disposals of other real estate acquired subject to loss-share agreements with the FDIC. + References No definition available. + Details
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- Definition Net adjustments in the period for FASB ASC 310-30 for the residual recorded investment. + References No definition available. + Details
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- Definition Net transfers between classifications of covered loans and covered other real estate + References No definition available. + Details
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- Definition This line item represents the number of key market regions in which entity's geographic other real estate distribution was concentrated . + References No definition available. + Details
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- Details
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- Definition Carrying amount as of the balance sheet date of other real estate. + References No definition available. + Details
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- Definition Transfers between classifications of covered loans and covered other real estate. + References No definition available. + Details
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- Definition Amount of write-downs on covered other assets or reserve provided in the period on a real estate investment. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of write-downs on non-covered other assets or reserve provided in the period on a real estate investment. + References No definition available. + Details
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- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14(d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 14 -Subparagraph d -Article 9 + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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