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Summary of Significant Accounting Policies - Disclosures of Cash Flow Information and Non-cash Transactions (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Cash paid during the period for:    
Interest $ 2,330 $ 2,598
Income taxes 63 52
Non-cash transactions:    
Repossessed and foreclosed assets acquired in settlement of loans 3,177 5,518
Reissuance of treasury stock as compensation $ 69 $ 106