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Loans - Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]    
Residential real estate $ 471,298 $ 347,904
Consumer 63,491 58,668
Credit cards 5,065 4,800
Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Residential real estate 468,759 345,094
Consumer 62,379 58,441
Credit cards 5,041 4,787
Non-Performing [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Residential real estate 2,539 2,810
Consumer 1,112 227
Credit cards $ 24 $ 13