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Loan Servicing - Activity Related to Servicing Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Receivables [Abstract]      
Balance at the beginning of the year $ 611 $ 545 $ 145
Recognition of servicing assets from the transfer of financial assets 101 261 529
Amortization (196) (195) (129)
Balance, end of period 516 611 545
Fair value, end of period $ 1,009 $ 1,995 $ 1,811