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Business Segment Information - Additional Information (Details) | Mar. 31, 2017
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Triumph Capital Advisors, LLC |
Segment Reporting Information [Line Items] |
Percentage of membership interests sold | 100.00%

X
- Definition Percentage of membership interests sold. + References No definition available. + Details
Name: | tbk_PercentageOfMembershipInterestsSold
Namespace Prefix: | tbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=tbk_TriumphCapitalAdvisorsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |