Note 6 - Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Variable Interest Entity, Primary Beneficiary [Member] | Ground Up Developments [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Number of Consolidated Entities	2
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 88.2
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	0.5
Variable Interest Entity, Financial or Other Support, Amount	35.6
Variable Interest Entity, Not Primary Beneficiary [Member] | Preferred Equity Investments [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Number of Consolidated Entities	1
Variable Interest Entity, Not Primary Beneficiary [Member] | Redevelopment [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Variable Interest Entity, Financial or Other Support, Amount	(11.0)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 11.0