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Loans and Allowance for Loan Losses (Details 1) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Nonperforming loans    
Loans past due 90 days or more still accruing interest $ 0 $ 0
Nonaccrual loans 24,782,000 45,074,000
Total nonperforming loans $ 24,782,000 $ 45,074,000