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Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings (Non Accruing Troubled Debt Restructuring Member, USD $)
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs $ 38,769,000 $ 47,731,000 $ 50,870,000
Interest Deferral [Member] | Commercial Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,443,000 1,685,000  
Interest Deferral [Member] | Residential Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 241,000 275,000  
Interest Deferral [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,684,000 1,960,000  
Principal Deferral [Member] | Commercial Loans Member
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 2,866,000 912,000 616,000
Principal Deferral [Member] | Real Estate Construction Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 16,009,000 16,767,000 13,579,000
Principal Deferral [Member] | Commercial Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 2,168,000 2,817,000 9,727,000
Principal Deferral [Member] | Residential Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 2,206,000 2,010,000 2,427,000
Principal Deferral [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 23,249,000 22,506,000 26,349,000
Rate Reduction [Member] | Commercial Loans Member
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs     1,859,000
Rate Reduction [Member] | Real Estate Construction Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs   9,579,000 12,376,000
Rate Reduction [Member] | Commercial Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs   5,746,000  
Rate Reduction [Member] | Residential Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs   586,000 449,000
Rate Reduction [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs   15,911,000 14,684,000
Rate Reduction and Forgiveness of Principal [Member] | Commercial Loans Member
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,352,000 1,518,000 1,506,000
Rate Reduction and Forgiveness of Principal [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,352,000 1,518,000 1,506,000
Rate Reduction and Payment Deferral [Member] | Real Estate Construction Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 9,263,000    
Rate Reduction and Payment Deferral [Member] | Commercial Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,843,000 5,076,000 5,076,000
Rate Reduction and Payment Deferral [Member] | Residential Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 1,378,000 760,000 311,000
Rate Reduction and Payment Deferral [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 12,484,000 5,836,000 5,387,000
Commercial Loans Member
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 4,218,000 2,430,000 3,981,000
Real Estate Construction Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 25,272,000 26,346,000 25,955,000
Commercial Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs 5,454,000 15,324,000 17,436,000
Residential Mortgage Loans [Member]
      
Note 5 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]      
Non-accrual TDRs $ 3,825,000 $ 3,631,000 $ 3,498,000