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Loans - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]      
Net deferred loan fees $ 123 $ 18  
Total loans 374,690 357,093 366,827
Consumer and Other Loans [Member]
     
Financing Receivable, Recorded Investment [Line Items]      
Total loans 11,818 12,301 11,970
Consumer and Other Loans [Member] | Demand Deposit Overdrafts [Member]
     
Financing Receivable, Recorded Investment [Line Items]      
Total loans $ 248 $ 279