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Equity and Noncontrolling Interests - Additional Information (Details) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2014
Nov. 13, 2014
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Feb. 28, 2009
Dec. 31, 2011
Jun. 15, 2014
Class Of Stock [Line Items]                                
Par value per share $ 0.01us-gaap_CommonStockParOrStatedValuePerShare   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare       $ 0.01us-gaap_CommonStockParOrStatedValuePerShare       $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare        
Common stock, issued additional   $ 12.00us-gaap_SaleOfStockPricePerShare                            
Gross proceeds from initial public offering   $ 92,460,000us-gaap_ProceedsFromIssuanceInitialPublicOffering                 $ 83,767,000us-gaap_ProceedsFromIssuanceInitialPublicOffering          
Net proceeds after underwriting discounts and offering expenses   83,767,000us-gaap_SaleOfStockConsiderationReceivedOnTransaction                            
Common stock outstanding 252,256us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber   252,256us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber               252,256us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber          
Exercise price of warrants, per share                         $ 11.58tbk_WarrantHasExercisePriceOfPerShare      
Maximum time to receive shares at special events                       30 days        
Company’s redemption rights modified date                         Oct. 15, 2018      
Federal bank regulatory effective date                         Jan. 01, 2015      
Dividend rate - floor                       8.00%us-gaap_PreferredStockDividendRatePercentage        
Stockholders equity noncontrolling interest 237,509,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   237,509,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest       160,597,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest       237,509,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 160,597,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 63,474,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   40,279,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest  
Stock issuance, net of costs                     6,000us-gaap_StockIssuedDuringPeriodValueNewIssues 42,402,000us-gaap_StockIssuedDuringPeriodValueNewIssues 1,000,000us-gaap_StockIssuedDuringPeriodValueNewIssues      
Total unpaid dividend of NBI     197,000us-gaap_DividendsPreferredStock 195,000us-gaap_DividendsPreferredStock 196,000us-gaap_DividendsPreferredStock 192,000us-gaap_DividendsPreferredStock 179,000us-gaap_DividendsPreferredStock 95,000us-gaap_DividendsPreferredStock 91,000us-gaap_DividendsPreferredStock 356,000us-gaap_DividendsPreferredStock 780,000us-gaap_DividendsPreferredStock 721,000us-gaap_DividendsPreferredStock        
Preferred stock redemption value 26,200,000tbk_RepurchaseAndRedemptionOfPreferredStock                              
NBI Acquisition                                
Class Of Stock [Line Items]                                
Total unpaid dividend of NBI                       4,343,000us-gaap_DividendsPreferredStock
/ us-gaap_BusinessAcquisitionAxis
= tbk_NbiAcquisitionMember
       
Common Stock                                
Class Of Stock [Line Items]                                
Stock issuance, net of cost (in shares)                     444us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
3,672,115us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
86,356us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Exchange offer (in shares)                       545,069us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stockholders equity noncontrolling interest 180,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  180,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
      98,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
      180,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
98,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
46,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  1,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Stock issuance, net of costs                       37,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
1,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Noncontrolling Interest                                
Class Of Stock [Line Items]                                
Stockholders equity noncontrolling interest             26,997,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
        26,997,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
6,962,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
     
Series T-1                                
Class Of Stock [Line Items]                                
Dividend rate - floor                           5.00%us-gaap_PreferredStockDividendRatePercentage
/ dei_LegalEntityAxis
= tbk_SeriesTOneMember
   
Number of shares issued                           24,664us-gaap_PreferredStockSharesIssued
/ dei_LegalEntityAxis
= tbk_SeriesTOneMember
   
Liquidation preference per share                           $ 1,000us-gaap_PreferredStockLiquidationPreference
/ dei_LegalEntityAxis
= tbk_SeriesTOneMember
   
Stock issuance, net of costs                           24,664,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ dei_LegalEntityAxis
= tbk_SeriesTOneMember
   
Series T-2                                
Class Of Stock [Line Items]                                
Number of shares issued                           1,233us-gaap_PreferredStockSharesIssued
/ dei_LegalEntityAxis
= tbk_SeriesTTwoMember
   
Preferred Stock - Series A                                
Class Of Stock [Line Items]                                
Dividend rate                     Prime + 2% Prime + 2%        
Dividend rate                     8.00%tbk_DividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
8.00%tbk_DividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
       
Conversion ratio - preferred to common                     6.94008%tbk_PreferredStockToCommonStockConversionRatio
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
         
Exchange offer (in shares)                       (4,500)us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
       
Stockholders equity noncontrolling interest 4,550,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  4,550,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      4,550,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      4,550,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
4,550,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
5,000,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
     
Number of shares issued 45,500us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  45,500us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      45,500us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      45,500us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
45,500us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
       
Liquidation preference per share $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
  $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
      $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
$ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
       
Series B Preferred Stock                                
Class Of Stock [Line Items]                                
Dividend rate                     8.00%tbk_DividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
8.00%tbk_DividendRate
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Conversion ratio - preferred to common                     6.94008%tbk_PreferredStockToCommonStockConversionRatio
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
         
Stockholders equity noncontrolling interest 5,196,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
  5,196,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      5,196,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      5,196,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
5,196,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Number of shares issued 51,956us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
  51,956us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      51,956us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      51,956us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
51,956us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Liquidation preference per share $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
  $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
      $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
$ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Class B Units | Noncontrolling Interest                                
Class Of Stock [Line Items]                                
Stockholders equity noncontrolling interest             1,100,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
        1,100,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
       
Class B Units | Triumph Commercial Finance Llc                                
Class Of Stock [Line Items]                                
Exchange offer (in shares)                       58,620us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Dividend rate - floor                       8.00%us-gaap_PreferredStockDividendRatePercentage
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Preferred stock, dividend payment rate, variable                       2.00%tbk_PreferredStockDividendBasisSpreadOnVariableRate
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Redeemable noncontrolling interest, units outstanding (in Shares)             11,000tbk_RedeemableNoncontrollingInterestUnitsOutstanding
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
        11,000tbk_RedeemableNoncontrollingInterestUnitsOutstanding
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Preferred stock, liquidation preference, value             100us-gaap_PreferredStockLiquidationPreferenceValue
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
        100us-gaap_PreferredStockLiquidationPreferenceValue
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Redemption of non cumulative non-voting shares                               11,000tbk_RedemptionOfNonCumulativeShares
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
Redemption price per share                               $ 102us-gaap_TemporaryEquityRedemptionPricePerShare
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
Stock issuance, net of costs                         3,750,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
     
Total unpaid dividend of NBI                     63,000us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
209,000us-gaap_DividendsPreferredStock
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
       
Class B Units | Triumph Commercial Finance Llc | Noncontrolling Interest                                
Class Of Stock [Line Items]                                
Stock issuance, net of costs                         3,750,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ dei_LegalEntityAxis
= tbk_TriumphCommercialFinanceLlcMember
/ us-gaap_StatementClassOfStockAxis
= tbk_ClassBUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
     
Series T-1 and T-2 | Noncontrolling Interest                                
Class Of Stock [Line Items]                                
Stockholders equity noncontrolling interest             25,897,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= tbk_SeriesTOneAndTTwoMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
        25,897,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementClassOfStockAxis
= tbk_SeriesTOneAndTTwoMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
       
NBI Senior Preferred Stock                                
Class Of Stock [Line Items]                                
Liquidation preference per share                           $ 1,000us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= tbk_NBISeniorPreferredStockMember
   
NBI Senior Preferred Stock | Series T-2                                
Class Of Stock [Line Items]                                
Dividend rate - floor                           9.00%us-gaap_PreferredStockDividendRatePercentage
/ dei_LegalEntityAxis
= tbk_SeriesTTwoMember
/ us-gaap_StatementClassOfStockAxis
= tbk_NBISeniorPreferredStockMember
   
Stock issuance, net of costs                           1,233,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ dei_LegalEntityAxis
= tbk_SeriesTTwoMember
/ us-gaap_StatementClassOfStockAxis
= tbk_NBISeniorPreferredStockMember
   
Warrant                                
Class Of Stock [Line Items]                                
Warrants issued to Triumph Consolidated Cos LLC                         259,067us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantMember
     
IPO                                
Class Of Stock [Line Items]                                
Stock issuance, net of cost (in shares)   6,700,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Par value per share   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Common stock, issued additional   $ 12.00us-gaap_SaleOfStockPricePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Gross proceeds from initial public offering   80,400,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
                           
Stock issuance, net of costs                     83,767,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
         
IPO | Common Stock                                
Class Of Stock [Line Items]                                
Stock issuance, net of cost (in shares)                     7,705,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
         
Stock issuance, net of costs                     77,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
         
Overallotment                                
Class Of Stock [Line Items]                                
Stock issuance, net of cost (in shares)   1,005,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_OverAllotmentOptionMember
                           
Gross proceeds from initial public offering   $ 12,060,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_OverAllotmentOptionMember