Annual report pursuant to Section 13 and 15(d)

Loans - Changes in Servicing Assets (Detail)

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Loans - Changes in Servicing Assets (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Balance at Beginning of Year $ 3,720 $ 2,890  
Addition 2,889 1,560 81
Amortization (1,067) (730)  
Balance at End of Year $ 5,542 $ 3,720 $ 2,890