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Business Segment Information - Banking Segment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Total interest income $ 23,280us-gaap_InterestAndDividendIncomeOperating $ 22,118us-gaap_InterestAndDividendIncomeOperating $ 21,453us-gaap_InterestAndDividendIncomeOperating $ 20,379us-gaap_InterestAndDividendIncomeOperating $ 18,842us-gaap_InterestAndDividendIncomeOperating $ 9,021us-gaap_InterestAndDividendIncomeOperating $ 7,946us-gaap_InterestAndDividendIncomeOperating $ 6,821us-gaap_InterestAndDividendIncomeOperating $ 87,230us-gaap_InterestAndDividendIncomeOperating $ 42,630us-gaap_InterestAndDividendIncomeOperating $ 26,952us-gaap_InterestAndDividendIncomeOperating
Total interest expense 1,951us-gaap_InterestExpense 1,723us-gaap_InterestExpense 1,572us-gaap_InterestExpense 1,524us-gaap_InterestExpense 1,484us-gaap_InterestExpense 893us-gaap_InterestExpense 803us-gaap_InterestExpense 767us-gaap_InterestExpense 6,770us-gaap_InterestExpense 3,947us-gaap_InterestExpense 3,715us-gaap_InterestExpense
Net interest income 21,329us-gaap_InterestIncomeExpenseNet 20,395us-gaap_InterestIncomeExpenseNet 19,881us-gaap_InterestIncomeExpenseNet 18,855us-gaap_InterestIncomeExpenseNet 17,358us-gaap_InterestIncomeExpenseNet 8,128us-gaap_InterestIncomeExpenseNet 7,143us-gaap_InterestIncomeExpenseNet 6,054us-gaap_InterestIncomeExpenseNet 80,460us-gaap_InterestIncomeExpenseNet 38,683us-gaap_InterestIncomeExpenseNet 23,237us-gaap_InterestIncomeExpenseNet
Provision for loan losses 1,811us-gaap_ProvisionForLoanAndLeaseLosses 1,375us-gaap_ProvisionForLoanAndLeaseLosses 1,747us-gaap_ProvisionForLoanAndLeaseLosses 925us-gaap_ProvisionForLoanAndLeaseLosses 1,057us-gaap_ProvisionForLoanAndLeaseLosses 1,735us-gaap_ProvisionForLoanAndLeaseLosses 241us-gaap_ProvisionForLoanAndLeaseLosses 379us-gaap_ProvisionForLoanAndLeaseLosses 5,858us-gaap_ProvisionForLoanAndLeaseLosses 3,412us-gaap_ProvisionForLoanAndLeaseLosses 1,739us-gaap_ProvisionForLoanAndLeaseLosses
Net interest income after provision for loan losses 19,518us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 19,020us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 18,134us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 17,930us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 16,301us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 6,393us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 6,902us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 5,675us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 74,602us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 35,271us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss 21,498us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Gain on branch sale   12,619us-gaap_GainLossOnSaleOfBusiness             12,619us-gaap_GainLossOnSaleOfBusiness    
Bargain purchase gain         9,014us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount         9,014us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount  
Other noninterest income                 12,148us-gaap_NoninterestIncomeOther 3,999us-gaap_NoninterestIncomeOther  
Noninterest income 3,721us-gaap_NoninterestIncome 15,804us-gaap_NoninterestIncome 2,633us-gaap_NoninterestIncome 2,609us-gaap_NoninterestIncome 11,522us-gaap_NoninterestIncome 717us-gaap_NoninterestIncome 329us-gaap_NoninterestIncome 445us-gaap_NoninterestIncome 24,767us-gaap_NoninterestIncome 13,013us-gaap_NoninterestIncome 2,661us-gaap_NoninterestIncome
Noninterest expense 19,685us-gaap_NoninterestExpense 18,461us-gaap_NoninterestExpense 16,160us-gaap_NoninterestExpense 14,896us-gaap_NoninterestExpense 14,657us-gaap_NoninterestExpense 6,547us-gaap_NoninterestExpense 6,173us-gaap_NoninterestExpense 5,347us-gaap_NoninterestExpense 69,202us-gaap_NoninterestExpense 32,724us-gaap_NoninterestExpense 18,479us-gaap_NoninterestExpense
Net income before income tax 3,554us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 16,363us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 4,607us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,643us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 13,166us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 563us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,058us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 773us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 30,167us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 15,560us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,680us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Total assets 1,447,898us-gaap_Assets       1,288,239us-gaap_Assets       1,447,898us-gaap_Assets 1,288,239us-gaap_Assets 301,462us-gaap_Assets
Gross loans 1,005,878us-gaap_LoansAndLeasesReceivableGrossCarryingAmount       881,099us-gaap_LoansAndLeasesReceivableGrossCarryingAmount       1,005,878us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 881,099us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 211,249us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Operating Segments | Factoring                      
Segment Reporting Information [Line Items]                      
Total interest income                 27,332us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
17,388us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
14,434us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Intersegment interest allocations                 (3,562)tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
(2,155)tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
(1,596)tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Total interest expense                   1us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
360us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Net interest income                 23,770us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
15,232us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
12,478us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Provision for loan losses                 1,792us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
881us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
1,334us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Net interest income after provision for loan losses                 21,978us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
14,351us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
11,144us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Other noninterest income                 1,589us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
1,042us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
 
Noninterest income                     967us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Intersegment expense allocations                   104tbk_IntersegmentExpenseAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
201tbk_IntersegmentExpenseAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Noninterest expense                 15,141us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
9,938us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
8,511us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Net income before income tax                 8,426us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
5,351us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
3,399us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Total assets 180,527us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
      122,279us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
      180,527us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
122,279us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
85,974us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Gross loans 170,426us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
      108,954us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
      170,426us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
108,954us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
72,073us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_FactoringMember
Operating Segments | Banking                      
Segment Reporting Information [Line Items]                      
Total interest income                 59,824us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
25,184us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
12,518us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Intersegment interest allocations                 3,562tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
2,155tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
1,596tbk_IntersegmentInterestAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Total interest expense                 5,091us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
3,577us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
3,355us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Net interest income                 58,295us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
23,762us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
10,759us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Provision for loan losses                 4,066us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
2,531us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
405us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Net interest income after provision for loan losses                 54,229us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
21,231us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
10,354us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Gain on branch sale                 12,619us-gaap_GainLossOnSaleOfBusiness
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
   
Other noninterest income                 8,898us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
2,674us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
 
Noninterest income                     1,687us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Intersegment expense allocations                   (104)tbk_IntersegmentExpenseAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
(201)tbk_IntersegmentExpenseAllocations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Noninterest expense                 46,808us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
18,191us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
9,548us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Net income before income tax                 28,938us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
5,818us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
2,694us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Total assets 1,201,940us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
      1,129,962us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
      1,201,940us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
1,129,962us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
215,225us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Gross loans 835,452us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
      772,145us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
      835,452us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
772,145us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
139,176us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tbk_BankingMember
Corporate                      
Segment Reporting Information [Line Items]                      
Total interest income                 74us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
58us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Total interest expense                 1,679us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
369us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Net interest income                 (1,605)us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(311)us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Net interest income after provision for loan losses                 (1,605)us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(311)us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Bargain purchase gain                   9,014us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Other noninterest income                 1,661us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
283us-gaap_NoninterestIncomeOther
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Noninterest income                     7us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Noninterest expense                 7,253us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
4,595us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
420us-gaap_NoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Net income before income tax                 (7,197)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
4,391us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(413)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Total assets $ 65,431us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
      $ 35,998us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
      $ 65,431us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
$ 35,998us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
$ 263us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember