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Litigation, Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Commitments and Contingencies Disclosure [Line Items] |  |
Commitments to extend credit | $ 213,408 | $ 236,471
Trust preferred securities | 15,460 |
FHLB Borrowings |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Commitments to extend credit | $ 6,190 | $ 6,180

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- Details
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