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v2.4.1.9

Fair Value Disclosures - Additional Information (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Liabilities, fair value disclosure, recurring | 0 us-gaap_LiabilitiesFairValueDisclosureRecurring | $ 0 us-gaap_LiabilitiesFairValueDisclosureRecurring
Liabilities, fair value disclosure, nonrecurring | 0 us-gaap_LiabilitiesFairValueDisclosureNonrecurring | 0 us-gaap_LiabilitiesFairValueDisclosureNonrecurring
Level 3 | Minimum [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Percentage of selling and closing costs for loans | 5.00%tbk_LoansReceivableSellingAndClosingCostsAsPercentageOfUnderlyingCollateral / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_RangeAxis = us-gaap_MinimumMember |
Real estate selling and closing costs as a percentage of appraised value | 5.00%tbk_RealEstateSellingAndClosingCostsAsPercentageOfAppraisedValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_RangeAxis = us-gaap_MinimumMember |
Level 3 | Maximum [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Percentage of selling and closing costs for loans | 8.00%tbk_LoansReceivableSellingAndClosingCostsAsPercentageOfUnderlyingCollateral / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_RangeAxis = us-gaap_MaximumMember |
Real estate selling and closing costs as a percentage of appraised value | 8.00%tbk_RealEstateSellingAndClosingCostsAsPercentageOfAppraisedValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_RangeAxis = us-gaap_MaximumMember |
State and Municipal | Level 3 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets measured at fair value | 3,495 us-gaap_AssetsFairValueDisclosureRecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_InvestmentTypeAxis = us-gaap_MunicipalBondsMember |

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- Definition Loans receivable selling and closing costs as percentage of underlying collateral. + References No definition available. + Details
Name: | tbk_LoansReceivableSellingAndClosingCostsAsPercentageOfUnderlyingCollateral
Namespace Prefix: | tbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Real estate selling and closing costs as percentage of appraised value. + References No definition available. + Details
Name: | tbk_RealEstateSellingAndClosingCostsAsPercentageOfAppraisedValue
Namespace Prefix: | tbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureRecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a nonrecurring basis by the entity. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureRecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |