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Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2021
Subordinated Borrowings [Abstract]  
Schedule of details of the trust preferred subordinated debentures The details of the trust preferred subordinated debentures as of June 30, 2021 are summarized below:
(dollar amounts in thousands)Texas Capital
Bancshares
Statutory Trust I
Texas Capital
Statutory
Trust II
Texas Capital
Statutory
Trust III
Texas Capital
Statutory
Trust IV
Texas Capital
Statutory Trust V
Date issuedNovember 19, 2002April 10, 2003October 6, 2005April 28, 2006September 29, 2006
Trust preferred securities issued$10,310$10,310$25,774$25,774$41,238
Floating or fixed rate securitiesFloatingFloatingFloatingFloatingFloating
Interest rate on subordinated debentures
3 month LIBOR
 + 3.35%
3 month LIBOR
 + 3.25%
3 month LIBOR
 + 1.51%
3 month LIBOR
 + 1.60%
3 month LIBOR
 + 1.71%
Maturity dateNovember 2032April 2033December 2035June 2036December 2036