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Note 12 - Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Note 12 - Derivative Financial Instruments (Details) [Line Items]    
Junior Subordinated Notes $ 61,900 $ 61,900
Derivative Asset, Notional Amount 55,713 50,792
Not Designated as Hedging Instrument [Member]    
Note 12 - Derivative Financial Instruments (Details) [Line Items]    
Derivative Asset, Notional Amount 36,300 36,300
Designated as Hedging Instrument [Member]    
Note 12 - Derivative Financial Instruments (Details) [Line Items]    
Derivative Asset, Notional Amount 19,400 14,500
Floating Rate Junior Subordinated Debentures [Member]    
Note 12 - Derivative Financial Instruments (Details) [Line Items]    
Derivative, Amount of Hedged Item $ 18,000 $ 18,000