Note 6 - Consolidated K-Series (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Consolidated K-Series [Member]
Note 6 - Consolidated K-Series (Details) [Line Items]
K-Series Carrying Value	$ 298,200,000	$ 240,000,000
Multi-Family Loans Held in Securitization Trusts [Member]
Note 6 - Consolidated K-Series (Details) [Line Items]
Mortgage Loans on Real Estate	7,900,000,000	8,000,000,000
Multi-Family Collateralized Debt Obligations [Member]
Note 6 - Consolidated K-Series (Details) [Line Items]
Mortgage Loans on Real Estate	$ 7,900,000,000	$ 8,000,000,000
Debt, Weighted Average Interest Rate	4.30%	4.16%