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Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Restructured Loans that Defaulted (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Financing Receivable, Modifications [Line Items]        
Number of contracts 0 5 0 6
Principal balance   $ 874   $ 1,067
Impairment accrued   353   353
Consumer Real Estate Loans [Member] | Closed-end First Liens [Member]
       
Financing Receivable, Modifications [Line Items]        
Number of contracts   1   1
Principal balance   26   26
Impairment accrued   1   1
Consumer Real Estate Loans [Member] | Closed-end Junior Liens [Member]
       
Financing Receivable, Modifications [Line Items]        
Number of contracts   1   1
Principal balance   47   47
Commercial Real Estate Loans [Member] | Commercial Real Estate, Owner Occupied [Member]
       
Financing Receivable, Modifications [Line Items]        
Number of contracts   2   3
Principal balance   664   857
Impairment accrued   352   352
Commercial Real Estate Loans [Member]
       
Financing Receivable, Modifications [Line Items]        
Impairment accrued   352    
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
       
Financing Receivable, Modifications [Line Items]        
Number of contracts   1   1
Principal balance   $ 137   $ 137