Note 7 - Investment and Advances in Real Estate Joint Ventures (Details) - Summarized Financial Information for KIR - Income Statements (KIR [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
KIR [Member]
Schedule of Equity Method Investments [Line Items]
Revenues from rental property	$ 201.6	$ 197.0	$ 190.6
Operating expenses	(57.7)	(53.7)	(50.8)
Interest expense	(46.1)	(47.8)	(54.0)
Depreciation and amortization	(39.2)	(38.8)	(38.8)
Impairment charges	(3.1)
Other expense, net	(1.5)	(0.6)	(1.3)
	(147.6)	(140.9)	(144.9)
Income from continuing operations	54.0	56.1	45.7
Discontinued Operations:
Income from discontinued operations	0.2	1.9	2.6
Impairment on dispositions of properties	(4.3)	(9.8)	(0.1)
Gain on dispositions of properties	4.5	6.1
Net income	$ 54.4	$ 54.3	$ 48.2