Loans and Allowance for Loan and Lease Losses - Summary of Contractually Past Due and Nonaccrual Loans (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Loans [Line Items]
30-89 Days Past Due	$ 9,099	$ 12,034
Past Due 90 Days or More Still Accruing	700	168
Nonaccrual	16,027	12,303
Total Past Due	25,826	24,505
Loans receivable \| PCI Loans
Loans [Line Items]
30-89 Days Past Due	260	2,434
Nonaccrual	6,206	6,135
Total Past Due	6,466	8,569
Loans receivable \| Commercial real estate
Loans [Line Items]
30-89 Days Past Due	643	1,212
Past Due 90 Days or More Still Accruing		47
Nonaccrual	1,995	276
Total Past Due	2,638	1,535
Loans receivable \| Construction, land development, land
Loans [Line Items]
30-89 Days Past Due		690
Total Past Due		690
Loans receivable \| 1-4 family residential properties
Loans [Line Items]
30-89 Days Past Due	584	1,789
Past Due 90 Days or More Still Accruing	49	19
Nonaccrual	638	454
Total Past Due	1,271	2,262
Loans receivable \| Commercial Loans
Loans [Line Items]
30-89 Days Past Due	114	1,482
Past Due 90 Days or More Still Accruing		11
Nonaccrual	7,188	5,438
Total Past Due	7,302	6,931
Loans receivable \| Factored receivables
Loans [Line Items]
30-89 Days Past Due	7,202	3,836
Past Due 90 Days or More Still Accruing	651	89
Total Past Due	7,853	3,925
Loans receivable \| Consumer
Loans [Line Items]
30-89 Days Past Due	296	591
Past Due 90 Days or More Still Accruing		2
Total Past Due	$ 296	$ 593

Financing receivable recorded investment 30 to 89 days past due.

No definition available.

Name:	tbk_FinancingReceivableRecordedInvestment30To89DaysPastDue
Namespace Prefix:	tbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	tbk_LoansLineItems
Namespace Prefix:	tbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: