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Other Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Amortization expense, deposit base intangible for 2014 $ 718
Amortization expense, deposit base intangible for 2015 0
Amortization expense, deposit base intangible for 2016 0
Amortization expense, deposit base intangible for 2017 0
Amortization expense, deposit base intangible for 2018 0
Amortization expense, deposit base intangible thereafter $ 0