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Note 7 - Loans (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Note 7 - Loans (Details) [Line Items]    
Impaired Financing Receivable, Recorded Investment $ 189,311,000 $ 200,780,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans 15.00% 23.90%
Financing Receivable, Modifications, Subsequent Default, Number of Contracts 0  
Nonaccrual Loans [Member]
    
Note 7 - Loans (Details) [Line Items]    
Impaired Financing Receivable, Recorded Investment 70,400,000 83,200,000
Accruing Troubled Debt Restructuring [Member]
    
Note 7 - Loans (Details) [Line Items]    
Impaired Financing Receivable, Recorded Investment 118,900,000 117,600,000
Reduction Of Stated Interest Rate Member | Minimum [Member]
    
Note 7 - Loans (Details) [Line Items]    
Troubled Debt Restructurings Length of Modifications 12 months  
Reduction Of Stated Interest Rate Member | Maximum [Member]
    
Note 7 - Loans (Details) [Line Items]    
Troubled Debt Restructurings Length of Modifications 3 years  
Accruing Troubled Debt Restructuring [Member]
    
Note 7 - Loans (Details) [Line Items]    
Troubled Debt Restructurings, Total 118,900,000 117,600,000
Impaired Financing Receivable, Modifications, Related Allowance 7,300,000 6,900,000
Non Accruing Troubled Debt Restructuring Member
    
Note 7 - Loans (Details) [Line Items]    
Troubled Debt Restructurings, Total 37,800,000 38,800,000
Impaired Financing Receivable, Modifications, Related Allowance $ 1,800,000 $ 2,200,000
Minimum [Member]
    
Note 7 - Loans (Details) [Line Items]    
Period Loan Is In Payment Default 60 days  
Maximum [Member]
    
Note 7 - Loans (Details) [Line Items]    
Period Loan Is In Payment Default 90 days