Commitment made to maintain minimum total risk-based ratio.

No definition available.

Name:	tbk_RiskBasedRatioCommitment
Namespace Prefix:	tbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Commitment made to maintain minimum Tier 1 capital to average assets ratio.

+ References

No definition available.

+ Details

Name:	tbk_TierOneCapitalAverageAssetsRatioCommitment
Namespace Prefix:	tbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Commitment made to maintain minimum leverage capital ratio (Tier 1 capital to average assets).

+ References

No definition available.

+ Details

Name:	tbk_TierOneLeverageCapitalRatioCommitment
Namespace Prefix:	tbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

The amount by which the company's Total Capital exceeds the minimum required for capital adequacy purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

+ Details

Name:	us-gaap_ExcessCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of excess Tier 1 Risk Based Capital (which consists of the types of financial capital considered the most reliable and liquid, primarily Shareholders' equity. Examples of Tier 1 capital are common stock or unit, preferred stock or unit that is irredeemable and noncumulative, and retained earnings) divided by risk-weighted assets which are assets that are weighted for credit risk according to a formula used by the Reserve Bank.

+ References

+ Details

Name:	us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=tbk_PhaseOutInTierTwoInTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=tbk_PhaseOutInTierTwoInTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=tbk_TriumphCommunityBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=tbk_TriumphSavingsBankSSBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Regulatory Matters - Additional Information (Details) (USD $) In Billions, unless otherwise specified	Dec. 31, 2009	Sep. 30, 2014
Maximum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital Adequacy, Amount	$ 15
Phase Out Of Tier 1 into Tier 2 Capital in 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of combined trust preferred issuances		75.00%
Phase Out Of Tier 1 into Tier 2 Capital in 2016
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of combined trust preferred issuances		100.00%
Triumph Savings Bank S S B \| Maximum [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital to average asset		12.00%
TCB
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Minimum capital to average asset		8.00%
Total risk-based ratio		10.00%