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Fair Value Disclosures - Indemnification Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Indemnification Asset [Roll Forward]
Beginning balance	$ 36,225
Indemnification reduction	(35,633)	$ 0	$ 0
Ending balance	4,786	36,225
Level 3
Indemnification Asset [Roll Forward]
Beginning balance	36,225	0	0
Indemnification asset recognized in business combination	0	30,959	0
Change in fair value of indemnification asset recognized in earnings	4,194	5,266	0
Indemnification reduction	(35,633)	0	0
Ending balance	$ 4,786	$ 36,225	$ 0

X

- Definition

Business Combination, Indemnification Asset

+ References

No definition available.

+ Details

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Namespace Prefix:	tbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Business Combination, Indemnification Asset, Acquisitions

+ References

No definition available.

+ Details

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Namespace Prefix:	tbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Business Combination, Indemnification Asset, Change in Fair Value

+ References

No definition available.

+ Details

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Namespace Prefix:	tbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Details

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