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Note 3 - Loans (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Gross $ 673,326,000 $ 676,190,000
Financing Receivable, Recorded Investment, Nonaccrual Status 7,481,000 12,116,000
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 15,200,000 20,296,000
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 2,579,000 3,004,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing 106,000  
Past Due 1-29 (Member)
    
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 1,400,000 1,200,000
Past Due 30-59 Days (Member)
    
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 7,800,060 3,400,000
Past Due 60-89 (Member)
    
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 256,000 421,000
Past Due 90 or more days (Member)
    
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing 5,800,000 7,100,000
Demand Deposit Overdrafts (Member)
    
Note 3 - Loans (Details) [Line Items]    
Financing Receivable, Gross $ 249,000 $ 293,000