Note 5 - Distressed Residential Mortgage Loans (Details) - Distressed Residential Mortgage Loans (Distressed Residential Mortgage Loans [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Distressed Residential Mortgage Loans [Member]
   
Note 5 - Distressed Residential Mortgage Loans (Details) - Distressed Residential Mortgage Loans [Line Items]    
Contractually required principal and interest $ 368,571 $ 174,746
Non-accretable yield (47,453) (21,614)
Expected cash flows to be collected 321,118 153,132
Accretable yield (102,952) (91,737)
Fair value at the date of acquisition $ 218,166 $ 61,395