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Loans and Asset Quality Information (Details Narrative) (USD $)
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Loans And Asset Quality Information Details Narrative      
Unamortized premiums on loans $ 717,000 $ 949,000 $ 1,182,000
Accreted discount on purchased nonimpaired loans into interest income 5,868,000    
Loan discount on purchased nonimpaired loans 73,519,000    
Percentage of loan discount accretion 80.00%    
Contractual Balance of nonaccruals covered by FDIC loss share agreements $ 60,400,000 $ 69,000,000 $ 69,400,000