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Note 8 - Deposits (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Note 8 - Deposits (Details) [Line Items]    
Time Deposits, $100,000 or More $ 100,000 $ 100,000
Interest-bearing Domestic Deposit, Brokered 517,400,000 522,100,000
Deposits 3,232,780,000 3,015,193,000
Denomination [Member]
    
Note 8 - Deposits (Details) [Line Items]    
Interest-bearing Domestic Deposit, Brokered 1,000.00 1,000.00
Excludes Brokered Deposits Issued In $1,000 Amounts Under A Master Certificate Of Deposit [Member]
    
Note 8 - Deposits (Details) [Line Items]    
Time Deposits, $100,000 or More 335,400,000 393,700,000
Securities Pledged as Collateral [Member]
    
Note 8 - Deposits (Details) [Line Items]    
Deposit Liabilities, Collateral Issued, Financial Instruments 407,400,000 439,500,000
Letter of Credit Pledged as Collateral [Member]
    
Note 8 - Deposits (Details) [Line Items]    
Deposit Liabilities, Collateral Issued, Financial Instruments 517,800,000 414,600,000
Government Deposits [Member]
    
Note 8 - Deposits (Details) [Line Items]    
Deposits $ 867,100,000 $ 697,000,000