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Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Triumph Bancorp Inc
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk weighted assets) Actual Amount	$ 229,509us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	$ 145,722us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Total Capital (to Risk Weighted Assets) Actual Ratio	20.40%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	14.50%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	90,213us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	80,398us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Risk Weighted Assets) Actual Amount	220,550us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	142,077us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio	19.60%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	14.10%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	45,107us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	40,306us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Average Assets) Actual Amount	220,550us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	142,077us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Average Assets) Actual Ratio	15.90%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	12.90%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	55,412us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	44,055us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphBancorpIncMember
Triumph Savings Bank S S B
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk weighted assets) Actual Amount	56,013us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	50,985us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Total Capital (to Risk Weighted Assets) Actual Ratio	16.50%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	16.40%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	27,118us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	24,871us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	33,898us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	31,088us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) Actual Amount	52,020us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	48,064us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio	15.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	15.50%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	13,559us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	12,404us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	20,339us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	18,605us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) Actual Amount	52,020us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	48,064us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) Actual Ratio	13.00%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	13.60%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	15,982us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	14,136us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	19,978us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	17,671us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = tbk_TriumphSavingsBankSSBMember
TCB
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk weighted assets) Actual Amount	117,254us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	89,690us-gaap_Capital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total Capital (to Risk Weighted Assets) Actual Ratio	15.00%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	13.00%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	62,547us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	55,194us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	78,184us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	68,992us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) Actual Amount	112,289us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	88,921us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) Actual Ratio	14.40%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	12.90%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	31,273us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	27,572us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	46,910us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	41,359us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) Actual Amount	112,289us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	88,921us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) Actual Ratio	11.90%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	10.10%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Amount	37,812us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	35,216us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) To Be Adequately Capitalized Under Prompt Corrective Action Provisions Ratio	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 47,265us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	$ 44,020us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = tbk_TriumphCommunityBankMember

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- Definition

The amount of total capital as defined in the regulations.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Total Capital divided by risk weighted assets as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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