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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Receivables [Abstract]        
Interest income that would have been recognized had impaired loans performed in accordance with their original terms $ 1,215 $ 1,057 $ 2,427 $ 2,125
Less: Interest income recognized on impaired loans (794) (926) (1,557) (1,822)
Interest foregone on impaired loans $ 421 $ 131 $ 870 $ 303