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v2.4.1.9

Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (3) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | ---
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual | $ 79,343 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | $ 65,238 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus |
Troubled Debt Restructurings [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 1,385 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 1,320 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 1,513 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Nonaccrual | 9,910 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 13,456 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 22,760 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Total | 11,295 trmk_TotalTroubledDebtRestructuringsByType / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 14,776 trmk_TotalTroubledDebtRestructuringsByType / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 24,273 trmk_TotalTroubledDebtRestructuringsByType / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Troubled Debt Restructurings [Member] | Construction, Land Development and Other Land [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 233 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Nonaccrual | 3,665 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 6,247 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 12,073 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Total | 3,665 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 6,247 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 12,306 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ConstructionLandDevelopmentAndOtherFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Troubled Debt Restructurings [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 1,385 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 1,320 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 1,280 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Nonaccrual | 3,733 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 4,201 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 5,908 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Total | 5,118 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 5,521 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 7,188 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_ResidentialFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Troubled Debt Restructurings [Member] | Nonfarm, Nonresidential Properties [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Nonaccrual | 1,854 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 2,292 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 4,582 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Total | 1,854 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 2,292 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 4,582 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_NonresidentialPropertiesFinancingReceivablesMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Troubled Debt Restructurings [Member] | Other Loans Secured by Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Nonaccrual | 149 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 167 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 197 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Total | 149 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 167 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 197 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_OtherRealEstateSecuredFinancingReceivableMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember
Troubled Debt Restructurings [Member] | Commercial And Industrial Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Accruing | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 0 trmk_FinancingReceivableRecordedInvestmentAccruing / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember |
Nonaccrual | 509 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | 549 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember |
Total | $ 509 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember | $ 549 trmk_TotalTroubledDebtRestructuringsByType / trmk_FinancingReceivableBySubClassReceivableAxis = trmk_CommercialAndIndustrialLoansMember / trmk_TroubledDebtRestructuringsByTypeAxis = trmk_TroubledDebtRestructuringsMember |

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- Definition Recorded investment in financing receivables that are still accruing. + References No definition available. + Details
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Namespace Prefix: | trmk_
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Balance Type: | debit
Period Type: | instant

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- Definition The total amount of troubled debt restructurings outstanding. + References No definition available. + Details
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Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
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- Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
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