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Business Combinations and Divestitures - Additional Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 0 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014 | Jul. 11, 2014 | Dec. 31, 2013 | Oct. 15, 2013
Business Acquisition [Line Items] |  |  |  |  |
Net cash proceeds |  | $ 57,409 us-gaap_ProceedsFromDivestitureOfBusinesses |  |  |
Deposits | 1,105,624 us-gaap_Deposits | 1,105,624 us-gaap_Deposits |  | 1,044,854 us-gaap_Deposits |
Pre-tax gain | 12,619 us-gaap_GainLossOnSaleOfBusiness | 12,619 us-gaap_GainLossOnSaleOfBusiness |  |  |
Loans | 45,334 us-gaap_BusinessCombinationAcquiredReceivablesFairValue | 45,334 us-gaap_BusinessCombinationAcquiredReceivablesFairValue |  |  |
Cash paid |  | 49,482 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |  |
Goodwill |  | 1,921 us-gaap_GoodwillAcquiredDuringPeriod |  |  |
Fair value of acquired loans not classified as PCI | 41,680 tbk_BusinessCombinationAcquiredReceivablesNotPCIFairValue | 41,680 tbk_BusinessCombinationAcquiredReceivablesNotPCIFairValue |  |  |
Senior notes, outstanding balance | 11,630 us-gaap_SeniorNotes | 11,630 us-gaap_SeniorNotes |  | 12,573 us-gaap_SeniorNotes |
THE National Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_StatementBusinessSegmentsAxis = tbk_TheNationalBankMember
TCB |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Net cash proceeds |  |  | 57,409 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_BusinessAcquisitionAxis = tbk_TriumphCommunityBankMember |  |
Deposits |  |  | 36,326 us-gaap_Deposits / us-gaap_BusinessAcquisitionAxis = tbk_TriumphCommunityBankMember |  |
Carrying amount of Loans Sold |  |  | 78,071 tbk_LoansOfDisposalGroupNotDiscontinuedOperation / us-gaap_BusinessAcquisitionAxis = tbk_TriumphCommunityBankMember |  |
Pre-tax gain |  |  | 12,619 us-gaap_GainLossOnSaleOfBusiness / us-gaap_BusinessAcquisitionAxis = tbk_TriumphCommunityBankMember |  |
NBI |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember
Business acquisition, bargain purchase gain |  |  |  | 9,014 us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember |
Senior notes, outstanding balance | 11,858 us-gaap_SeniorNotes / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember | 11,858 us-gaap_SeniorNotes / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember |  |  |
NBI | Convertible Notes Payable |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Senior notes, outstanding balance | $ 3,640 us-gaap_SeniorNotes / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember | $ 3,640 us-gaap_SeniorNotes / us-gaap_BusinessAcquisitionAxis = tbk_NationalBankSharesIncorporationMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |  |  |

X
- Definition Fair value of receivables acquired that were not otherwise classified as PCI. + References No definition available. + Details
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Balance Type: | debit
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- Definition Loans of disposal group not discontinued operation. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the fair value of the receivables acquired, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6571-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6527-128477 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6396-128476 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6387-128476 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6393-128476 + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment. + References No definition available. + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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