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Securities - Composition of Restricted Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Available For Sale Securities [Abstract]    
Federal Home Loan Bank stock $ 909 $ 1,078
Federal Reserve Bank stock 846 846
Community Bankers' Bank stock 50 50
Total Restricted Securities $ 1,805 $ 1,974