Quarterly report pursuant to Section 13 or 15(d)

Loans - Summary of Interest Foregone on Impaired Loans (Detail)

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Loans - Summary of Interest Foregone on Impaired Loans (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Receivables [Abstract]        
Interest income that would have been recognized had impaired loans performed in accordance with their original terms $ 1,063 $ 1,058 $ 3,490 $ 3,183
Less: Interest income recognized on impaired loans (796) (900) (2,353) (2,722)
Interest foregone on impaired loans $ 267 $ 158 $ 1,137 $ 461