Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Receivables [Abstract]      
Interest income that would have been recognized had impaired loans performed in accordance with their original terms $ 4,451 $ 5,887 $ 9,192
Less: Interest income recognized on impaired loans (3,708) (4,541) (8,348)
Interest foregone on impaired loans $ 743 $ 1,346 $ 844