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Foreclosed Assets - Summary of Expenses Related to Foreclosed Real Estate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Banking and Thrift [Abstract]      
Net loss (gain) on sale $ (134) $ 3 $ (71)
Operating expenses, net of rental income 223 169 254
Total $ 89 $ 172 $ 183