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Stock Based Compensation - Additional Information (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock based compensation expense $ 2,690,000us-gaap_AllocatedShareBasedCompensationExpense $ 129,000us-gaap_AllocatedShareBasedCompensationExpense $ 0us-gaap_AllocatedShareBasedCompensationExpense
Omnibus Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Aggregate number of common stock available for issuance 1,200,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= tbk_OmnibusIncentivePlanMember
   
Restricted Stock | Omnibus Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Nonvested, Granted 378,343us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= tbk_OmnibusIncentivePlanMember
   
RSAs      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Nonvested, Granted 378,343us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= tbk_RestrictedStockAwardsRSAMember
   
RSAs | Omnibus Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total unrecognized compensation cost $ 3,479,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= tbk_RestrictedStockAwardsRSAMember
/ us-gaap_PlanNameAxis
= tbk_OmnibusIncentivePlanMember
   
Weighted-average period to recognize cost 2 years    
Restricted Stock Units (RSUs)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Nonvested, Granted 32,275us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
26,120us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
 
Shares approved for issuance 750,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember