Note 8 - Derivatives Instruments and Hedging Activities (Details) - Interest Rate Swaps And Interest Rate Caps (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 8 - Derivatives Instruments and Hedging Activities (Details) - Interest Rate Swaps And Interest Rate Caps [Line Items]      
Interest expense-investment securities $ 11,293 $ 1,945  
Interest Rate Swaps Held In Securitization Trusts [Member]
     
Note 8 - Derivatives Instruments and Hedging Activities (Details) - Interest Rate Swaps And Interest Rate Caps [Line Items]      
Interest expense-investment securities $ 1,737 $ 810 $ 893