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Business Segment Information - Additional Information (Details)	Mar. 31, 2017
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: