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Other Real Estate Owned Net - Components of Expenses Applicable to Foreclosed Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Real Estate Acquired Through Foreclosure Or Similar Procedures [Line Items]    
Net loss on sales of real estate $ 74 $ 107
Provision for losses 53 288
Operating expenses, net of income 93 68
Total expenses $ 220 $ 463