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Supplemental Disclosure of Cash Flow Information - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Schedule of Cash Flow, Supplemental [Line Items]    
Cash paid for interest due on interest-bearing liabilities $ 2,117 $ 2,942
Cash paid for income taxes   1,643
Assets acquired in settlement of loans 11,206 2,948
Proceeds from sales of foreclosed assets less loans extended to finance sales 6,886 1,887
Loans extended to finance the sale of foreclosed assets $ 3,684 $ 1,381