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Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Commercial and Industrial [Member]
        
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]        
Impaired loans, average recorded investment $ 2,085 $ 2,535 $ 2,286 $ 2,170
Impaired loans, interest income recognized 8 139 78 170
Real Estate Construction [Member]
        
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]        
Impaired loans, average recorded investment 3,731 2,305 3,654 2,400
Impaired loans, interest income recognized 43   138 113
Residential Real Estate Mortgage [Member]
        
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]        
Impaired loans, average recorded investment 5,351 3,622 5,213 3,764
Impaired loans, interest income recognized 81 85 224 169
Commercial Real Estate Mortgage [Member]
        
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]        
Impaired loans, average recorded investment 6,403 3,597 6,275 3,985
Impaired loans, interest income recognized 138 200 355 324
Consumer Installment [Member]
        
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]        
Impaired loans, average recorded investment 13 13 15 27
Impaired loans, interest income recognized   $ 1 $ 1 $ 2