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FDIC Indemnification Asset - Additional Information (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Resale Agreement Counterparty [Line Items]    
Loans covered $ 68,585 $ 83,035
Covered OREO $ 2,017 $ 4,034
Waccamaw Bank    
Resale Agreement Counterparty [Line Items]    
Percentage of loan and foreclosed real estate losses covered by FDIC 80.00%