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Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs $ 34,162 $ 38,769
Commercial Loans [Member] | Principal Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 2,186 2,866
Commercial Loans [Member] | Rate Reduction and Forgiveness of Principal [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 1,225 1,352
Commercial Loans [Member] | Rate Reduction and Payment Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 243  
Commercial Loans [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 3,654 4,218
Real Estate Construction Loans [Member] | Principal Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 15,377 16,009
Real Estate Construction Loans [Member] | Rate Reduction and Payment Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 8,851 9,263
Real Estate Construction Loans [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 24,228 25,272
Commercial Mortgage Loans [Member] | Interest Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 226 1,443
Commercial Mortgage Loans [Member] | Principal Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 3,159 2,168
Commercial Mortgage Loans [Member] | Rate Reduction and Payment Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 1,369 1,843
Commercial Mortgage Loans [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 4,754 5,454
Residential Mortgage Loans [Member] | Interest Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 213 241
Residential Mortgage Loans [Member] | Principal Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs   2,206
Residential Mortgage Loans [Member] | Rate Reduction and Payment Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 1,313 1,378
Residential Mortgage Loans [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 1,526 3,825
Interest Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 439 1,684
Principal Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 20,722 23,249
Rate Reduction and Forgiveness of Principal [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs 1,225 1,352
Rate Reduction and Payment Deferral [Member]
    
Note 7 - Loans (Details) - Non-accrual Troubled Debt Restructurings [Line Items]    
Non-accrual TDRs $ 11,776 $ 12,484