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Summary of Significant Accounting Policies - Disclosures of Cash Flow Information and Non-cash Transactions (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Cash paid (refunded) during the period for:    
Interest $ 2,598us-gaap_InterestPaidNet $ 3,052us-gaap_InterestPaidNet
Income taxes 52us-gaap_IncomeTaxesPaidNet (2,252)us-gaap_IncomeTaxesPaidNet
Non-cash transactions:    
Foreclosed assets acquired in settlement of loans 5,518us-gaap_MortgageLoansOnRealEstateForeclosures 2,396us-gaap_MortgageLoansOnRealEstateForeclosures
Reissuance of treasury stock as compensation $ 106us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued $ 131us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued