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Summary of Commitments to Extend Credit (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Unfunded Commitments To Extend Credit [Line Items]    
Fixed rate $ 865 $ 1,554
Adjustable rate 5,453 11,640
Unfunded Commitments to Extend Credit 57,745 55,980
Unused lines of credit on credit cards
    
Unfunded Commitments To Extend Credit [Line Items]    
Unfunded Commitments to Extend Credit 3,821 2,981
Undisbursed commercial and personal lines of credit
    
Unfunded Commitments To Extend Credit [Line Items]    
Unfunded Commitments to Extend Credit 19,484 17,413
Undisbursed portion of construction loans in process
    
Unfunded Commitments To Extend Credit [Line Items]    
Unfunded Commitments to Extend Credit 7,142 4,306
Undisbursed portion of home equity lines of credit
    
Unfunded Commitments To Extend Credit [Line Items]    
Unfunded Commitments to Extend Credit $ 20,980 $ 18,086