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Supplemental Disclosure Of Cash Flow Information - Additional Information (Detail) (USD $)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Schedule Of Cash Flow Supplemental [Line Items]    
Cash paid for interest due on interest-bearing liabilities $ 1,794,000 $ 2,117,000
Cash paid for income taxes 0 0
Assets acquired in settlement of loans 2,622,000 11,206,000
Proceeds from sales of foreclosed assets less loans extended to finance sales 10,156,000 6,886,000
Loans extended to finance the sale of foreclosed assets $ 390,000 $ 3,684,000