XML 50 R116.htm IDEA: XBRL DOCUMENT v2.4.1.9
Subsequent Events - Additional Information (Details) (Subsequent Event, Doral Money, Inc, USD $)
 0 Months Ended
Mar. 03, 2015
Subsequent Event [Line Items]  
Consideration paid $ 33,300,000us-gaap_BusinessCombinationConsiderationTransferred1
Assets Under Management
  
Subsequent Event [Line Items]  
Assets under management acquired 703,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= tbk_DoralMoneyIncorporationMember
/ us-gaap_FinancialInstrumentAxis
= tbk_AssetsUnderManagementMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Shared National Credit Portfolio
  
Subsequent Event [Line Items]  
Assets under management acquired $ 37,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= tbk_DoralMoneyIncorporationMember
/ us-gaap_FinancialInstrumentAxis
= tbk_SharedNationalCreditPortfolioMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember