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Regulatory Matters - Additional Information (Details) (USD $) In Billions, unless otherwise specified | Dec. 31, 2009 | Sep. 30, 2014
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Maximum [Member] |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |
Capital Adequacy, Amount | $ 15 us-gaap_ExcessCapital / us-gaap_RangeAxis = us-gaap_MaximumMember |
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%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_PhaseOutInTierTwoInTwoThousandFifteenMember
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%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_PhaseOutInTierTwoInTwoThousandSixteenMember
Triumph Savings Bank S S B | Maximum [Member] |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |
Capital to average asset |  | 12.00%tbk_TierOneLeverageCapitalRatioCommitment / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember / us-gaap_RangeAxis = us-gaap_MaximumMember
TCB |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |
Minimum capital to average asset |  | 8.00%tbk_TierOneCapitalAverageAssetsRatioCommitment / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total risk-based ratio |  | 10.00%tbk_RiskBasedRatioCommitment / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember

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- Definition Commitment made to maintain minimum total risk-based ratio. + References No definition available. + Details
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- Definition Commitment made to maintain minimum Tier 1 capital to average assets ratio. + References No definition available. + Details
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Namespace Prefix: | tbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Commitment made to maintain minimum leverage capital ratio (Tier 1 capital to average assets). + References No definition available. + Details
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Namespace Prefix: | tbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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- 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

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- 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 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
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- Details
Name: | dei_LegalEntityAxis=tbk_PhaseOutInTierTwoInTwoThousandFifteenMember
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=tbk_PhaseOutInTierTwoInTwoThousandSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | dei_LegalEntityAxis=tbk_TriumphSavingsBankSSBMember
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Period Type: |

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- Details
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