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Deposits - Summary of Deposits (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deposits [Abstract]    
Noninterest bearing demand $ 179,848us-gaap_NoninterestBearingDomesticDepositDemand $ 150,238us-gaap_NoninterestBearingDomesticDepositDemand
Interest bearing demand 236,525us-gaap_InterestBearingDomesticDepositDemand 199,826us-gaap_InterestBearingDomesticDepositDemand
Individual retirement accounts 55,034tbk_InterestBearingDomesticDepositIndividualRetirementAccounts 54,512tbk_InterestBearingDomesticDepositIndividualRetirementAccounts
Money market 117,514us-gaap_InterestBearingDomesticDepositMoneyMarket 157,406us-gaap_InterestBearingDomesticDepositMoneyMarket
Savings 70,407us-gaap_InterestBearingDomesticDepositSavings 69,336us-gaap_InterestBearingDomesticDepositSavings
Certificates of deposit 455,901us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits 354,940us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits
Brokered deposits 50,000us-gaap_InterestBearingDomesticDepositBrokered 58,596us-gaap_InterestBearingDomesticDepositBrokered
Total deposits $ 1,165,229us-gaap_Deposits $ 1,044,854us-gaap_Deposits