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Other Real Estate Owned - Summary of Changes in the Balance for OREO (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Real Estate [Abstract]    
Balance at the beginning of year, gross $ 7,764 $ 9,166
Transfers in 2,036 5,578
Charge-offs (1,564) (1,808)
Sales proceeds (3,618) (5,438)
Gain on disposition 80 268
Depreciation (3) (2)
Balance at the end of year, gross 4,695 7,764
Less: valuation allowance (1,665) (2,174)
Balance at the end of year, net $ 3,030 $ 5,590