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v2.4.1.9

Borrowings and Borrowing Capacity - Additional Information (Details) (USD $) | 12 Months Ended | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Nov. 13, 2014 | Dec. 31, 2013 | Oct. 15, 2013
Debt Instrument [Line Items] |  |  |  |
Customer repurchase agreements | $ 14,900,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities |  | $ 11,330,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities |
Federal funds purchased | 0 us-gaap_FederalFundsPurchased |  | 0 us-gaap_FederalFundsPurchased |
Senior secured note |  |  | 12,573,000 us-gaap_SeniorNotes |
Debt instrument, Frequency of periodic payment | Quarterly |  |  |
Junior subordinated debentures | 24,423,000 us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust |  | 24,171,000 us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust |
NBI Acquisition |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Junior subordinated debentures, face value outstanding |  |  |  | 32,990,000 tbk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedJuniorSubordinatedDebenturesFaceValue / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember
Junior subordinated debentures, fair value |  |  | 24,120,000 tbk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedJuniorSubordinatedDebentures / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember | 24,120,000 tbk_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedJuniorSubordinatedDebentures / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember
Senior Secured Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Senior secured note |  |  | 12,573,000 us-gaap_SeniorNotes / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |
Debt instrument quarterly principal payment |  |  | 314,000 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |
Maturity date | Oct. 15, 2018 |  |  |
Debt instrument interest rate |  |  | 4.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |
Senior secured note principal amount |  | 11,300,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |  |
Percentage of prepayment penalty |  | 1.00%tbk_PercentageOfPrepaymentPenalty / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |  |
Prepayment penalty |  | 113,000 us-gaap_PaymentsOfDebtExtinguishmentCosts / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |  |
Accrued but unpaid interest |  | 41,000 us-gaap_DebtInstrumentIncreaseAccruedInterest / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember |  |
Minimum | Senior Secured Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable interest rate |  |  | 4.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = tbk_SeniorSecuredNoteMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
TSB |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured federal funds line of credit | 24,500,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / dei_LegalEntityAxis = tbk_TriumphSavingsBankMember |  |  |
TCB |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured federal funds line of credit | 75,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember |  |  |
National Bancshares Capital Trusts II and III |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Investments in nonconsolidated subsidiaries, percentage | 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIAndIIIMember |  |  |
National Bancshares Capital Trusts II |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Junior subordinated debentures | 15,464,000 us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIMember |  |  |
Obligated capital securities | 15,000,000 us-gaap_SaleOfStockConsiderationReceivedPerTransaction / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIMember |  |  |
National Bancshares Capital Trusts II | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable interest rate | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Maturity date | Sep. 15, 2033 |  |  |
Description of variable rate basis | three-month LIBOR |  |  |
Effective interest rate | 3.24%us-gaap_DebtInstrumentInterestRateStatedPercentage / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  | 3.24%us-gaap_DebtInstrumentInterestRateStatedPercentage / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
National Bancshares Capital Trusts III |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Junior subordinated debentures | 17,526,000 us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIIMember |  |  |
Obligated capital securities | $ 17,000,000 us-gaap_SaleOfStockConsiderationReceivedPerTransaction / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIIMember |  |  |
National Bancshares Capital Trusts III | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable interest rate | 1.64%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Maturity date | Jul. 07, 2036 |  |  |
Description of variable rate basis | three-month LIBOR |  |  |
Effective interest rate | 1.87%us-gaap_DebtInstrumentInterestRateStatedPercentage / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  | 1.88%us-gaap_DebtInstrumentInterestRateStatedPercentage / dei_LegalEntityAxis = tbk_NationalBancsharesCapitalTrustsIIIMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
Securities Sold Under Agreements to Repurchase |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Securities maturity term | 1 year |  |  |
FHLB Advances |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Securities maturity term | 1 month |  |  |

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