Annual report pursuant to Section 13 and 15(d)

Allowance for loan losses (Detail)

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Allowance for loan losses (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for loan losses:      
Balance, beginning of year $ 22,030 $ 18,077 $ 14,737
Loans charged off (5,755) (5,653) (7,208)
Recoveries 883 634 198
Provision for loan losses 9,100 8,972 10,350
Balance, end of year $ 26,258 $ 22,030 $ 18,077