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Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans $ 37,524 $ 45,997 $ 41,206
Commercial Loan [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,261 5,198  
Commercial Loan [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 3,346 4,050  
Commercial Loan [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 9,607 9,248 7,282
Commercial Loan [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 9,607 9,248  
Commercial Real Estate Investment [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 3,909 3,924  
Commercial Real Estate Investment [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 2,555 1,676  
Commercial Real Estate Investment [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,464 5,600 5,789
Commercial Real Estate Investment [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,464 5,600  
Commercial Real Estate Owner Occupied [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans   6,452  
Commercial Real Estate Owner Occupied [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,426 207  
Commercial Real Estate Owner Occupied [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,426 6,659 2,374
Commercial Real Estate Owner Occupied [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,426 6,659  
Residential Mortgage [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 113    
Residential Mortgage [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 782 699  
Residential Mortgage [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 895 699 713
Residential Mortgage [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 895 699  
Home Equity Line of Credit [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 37 510  
Home Equity Line of Credit [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 474 3  
Home Equity Line of Credit [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 511 513 670
Home Equity Line of Credit [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 511 513  
Consumer, Other [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 0    
Consumer, Other [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 45 43  
Consumer, Other [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 45 43 7
Consumer, Other [Member] | Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 45 43  
Construction Loans [Member] | Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,874 12,937  
Construction Loans [Member] | Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 6,702 10,298  
Construction Loans [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 13,576 23,235 24,371
Fair Value, Inputs, Level 2 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Other real estate owned 5,791 4,969  
Total assets measured at fair value on a nonrecurring basis 22,985 33,990  
Fair Value, Inputs, Level 3 [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Other real estate owned 5,494 330  
Total assets measured at fair value on a nonrecurring basis 25,824 17,306  
Estimate of Fair Value Measurement [Member] | Construction Loans [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Impaired loans 13,576 23,235  
Estimate of Fair Value Measurement [Member]
      
Note 8 - Fair Value Measurements (Details) - Assets Measured At Fair Value On A Nonrecurring Basis [Line Items]      
Other real estate owned 11,285 5,299  
Total assets measured at fair value on a nonrecurring basis $ 48,809 $ 51,296