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Other Real Estate Owned - Schedule of Operating Expenses Related to OREO (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Real Estate And Foreclosed Assets [Abstract]
Net realized gains (losses) and valuation adjustments on OREO	$ (582)us-gaap_GainsLossesOnSalesOfOtherRealEstate	$ 154us-gaap_GainsLossesOnSalesOfOtherRealEstate	$ 1,379us-gaap_GainsLossesOnSalesOfOtherRealEstate
Carrying costs for OREO	(373)us-gaap_ForeclosedRealEstateExpense	(233)us-gaap_ForeclosedRealEstateExpense	(240)us-gaap_ForeclosedRealEstateExpense
OREO foreclosed, income (loss)	$ (955)tbk_OtherRealEstateForeclosedIncomeLoss	$ (79)tbk_OtherRealEstateForeclosedIncomeLoss	$ 1,139tbk_OtherRealEstateForeclosedIncomeLoss

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- Definition

Other Real Estate Foreclosed, Income (Loss)

+ References

No definition available.

+ Details

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- Definition

Amount of expense recognized during the period for the foreclosure on real estate assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
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- Definition

The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14(d))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 14

-Subparagraph d

-Article 9

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