XML 78 R93.htm IDEA: XBRL DOCUMENT v2.4.1.9
Derivative Financial Instruments Part 2 (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Interest Rate Swap [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset $ 3,025us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		 $ 7,431us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		  
Fair value of derivative liability 2,813us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		 4,628us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		  
Derivatives in Hedging Relationships [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of gain (loss) recognized (2)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Derivatives in Hedging Relationships [Member] | Mortgage Banking, Net [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of gain (loss) recognized in mortgage banking, net (2,534)trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember		 2,649trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember		 1,479trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember
Derivatives in Hedging Relationships [Member] | Other Comprehensive Income (Loss) [Member]      
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]      
Amount of (loss) gain recognized in other comprehensive income (loss) (1,387)us-gaap_DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember		 1,524us-gaap_DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember		 0us-gaap_DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember
Derivatives in Hedging Relationships [Member] | Interest Rate Swap [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 221us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 2,469us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		  
Derivatives in Hedging Relationships [Member] | Forward Contracts [Member] | Other Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liability 0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 [1] (1,911)us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 [1]  
Derivatives not Designated as Hedging Instruments [Member] | Mortgage Banking, Net [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of gain (loss) recognized in mortgage banking, net 11,038trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember		 (10,459)trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember		 7,585trmk_DerivativeInstrumentsGainLossClassifiedIntoIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_MortgageBankingNetMember
Derivatives not Designated as Hedging Instruments [Member] | Bank card and Other Fees [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (loss) gain recognized in bank card and other fees (223)trmk_DerivativeInstrumentsGainLossClassifiedIntoBankCardIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_BankcardAndOtherFeesMember		 290trmk_DerivativeInstrumentsGainLossClassifiedIntoBankCardIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_BankcardAndOtherFeesMember		 (82)trmk_DerivativeInstrumentsGainLossClassifiedIntoBankCardIncomeNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= trmk_BankcardAndOtherFeesMember
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 2,804us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 4,962us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liability 2,813us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 4,628us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Forward Contracts [Member] | Other Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liability 1,014us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 [1] 0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 [1]  
Derivatives not Designated as Hedging Instruments [Member] | Future Contracts [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 928us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_FutureMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 (2,662)us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_FutureMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Exchange Traded Purchased Options [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 253us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_ExchangeTradedPurchasedOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 83us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_ExchangeTradedPurchasedOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | OTC Written Options (Rate Locks) [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 1,299us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_OtcWrittenOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 126us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_OtcWrittenOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Credit Risk Participation Agreement [Member] | Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative asset 22us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 16us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Credit Risk Participation Agreement [Member] | Other Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liability 21us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
Derivatives not Designated as Hedging Instruments [Member] | Exchange Traded Written Options [Member] | Other Liabilities [Member]      
Derivatives, Fair Value [Line Items]      
Fair value of derivative liability $ 490us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_ExchangeTradedWrittenOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 $ 581us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= trmk_ExchangeTradedWrittenOptionsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		  
[1] At December 31, 2014, forward contracts were no longer designated as hedging.