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Business Combinations and Divestitures - Schedule of Loans Acquired in Business Combination (Details) (PCI Loans, USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Oct. 15, 2013
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Doral Healthcare Acquisition |  |
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Line Items] |  |
Contractual balance at acquisition | $ 5,009 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition / us-gaap_BusinessAcquisitionAxis = tbk_DoralHealthcareAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember |
Contractual cash flows not expected to be collected (nonaccretable difference) | (873)us-gaap_CertainLoansAcquiredInTransferNonaccretableDifference / us-gaap_BusinessAcquisitionAxis = tbk_DoralHealthcareAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember |
Expected cash flows at acquisition | 4,136 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition / us-gaap_BusinessAcquisitionAxis = tbk_DoralHealthcareAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember |
Accretable yield | (482)us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = tbk_DoralHealthcareAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember |
Fair value of acquired PCI loans | 3,654 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue / us-gaap_BusinessAcquisitionAxis = tbk_DoralHealthcareAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember |
NBI Acquisition |  |
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Line Items] |  |
Contractual balance at acquisition |  | 29,970 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember
Contractual cash flows not expected to be collected (nonaccretable difference) |  | (5,141)us-gaap_CertainLoansAcquiredInTransferNonaccretableDifference / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember
Expected cash flows at acquisition |  | 24,829 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember
Accretable yield |  | (1,717)us-gaap_CertainLoansAcquiredInTransferAccretableYield / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember
Fair value of acquired PCI loans |  | $ 23,112 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue / us-gaap_BusinessAcquisitionAxis = tbk_NbiAcquisitionMember / us-gaap_InternalCreditAssessmentAxis = tbk_PurchasedCreditImpairedLoansMember

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- Definition The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of cash flows expected to be collected at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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