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Loans and Allowance for Loan Losses (Details 2) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans $ 10,526,000 $ 18,970,000
Commercial and industrial [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 1,581,000 1,677,000
Vacant land, land development, and residential construction [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 922,000 2,194,000
Real estate - owner occupied [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 570,000 2,087,000
Real estate - non-owner occupied [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 4,642,000 9,010,000
Real estate - multi-family and residential rental [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 764,000 2,021,000
Total commercial [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 8,479,000 16,989,000
Retail Home equity and other [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 805,000 889,000
Retail 1-4 family mortgages [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans 1,242,000 1,092,000
Total retail [Member]
    
Recorded principal balance of nonaccrual loans, including troubled debt restructurings    
Total nonaccrual loans $ 2,047,000 $ 1,981,000