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Related Party Transactions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]      
Loan to related parties, decreases $ (1,473) $ (4,369) $ (4,132)
Related party fees 57 63 80
Lease expense 1,180 1,260 1,170
Related Parties
     
Related Party Transaction [Line Items]      
Lease expense 134 171 164
Subsidiary Board Members and Executive Officers
     
Related Party Transaction [Line Items]      
Net increase in related party deposit 103 166 14,070
Loan to related parties, decreases $ (613) $ (2,790)