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Other Real Estate Owned - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Banking and Thrift [Abstract]    
Covered OREO   $ 15,000
Non-covered OREO   56,500
Proceeds from sales of OREO $ 7,072 7,887
Net gain on sales of OREO $ (679) $ (7)