Note 8 - Other Real Estate Investments (Details) - Preferred Equity Investments - Balance Sheet Disclosures - Preferred Equity Investments [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets:
Assets	$ 886.3	$ 1,123.5
Liabilities and Partners’/Members’ Capital:
Partners’/Members’ capital	309.7	334.3
	886.3	1,123.5
Real estate, net [Member]
Assets:
Assets	258.0	456.9
Other Assets [Member]
Assets:
Assets	628.3	666.6
Notes and Mortgage Payable [Member]
Liabilities and Partners’/Members’ Capital:
Liabilities	563.7	767.6
Other Liabilities [Member]
Liabilities and Partners’/Members’ Capital:
Liabilities	$ 12.9	$ 21.6