Note 8 - Other Real Estate Investments (Details) - Preferred Equity Investments - Income Statement Disclosures (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Note 8 - Other Real Estate Investments (Details) - Preferred Equity Investments - Income Statement Disclosures [Line Items]
Revenues from rental property	$ 238,055,000	[1]	$ 226,536,000	[1]	$ 225,207,000	[1]	$ 220,558,000	[1]	$ 216,895,000	[1]	$ 208,130,000	[1]	$ 208,648,000	[1]	$ 203,208,000	[1]	$ 910,356,000		$ 836,881,000		$ 779,156,000
Operating expenses																	(721,171,000)		(607,855,000)		(576,697,000)
Interest expense																	(213,911,000)		(225,710,000)		(221,678,000)
Depreciation and amortization																	(247,537,000)		(236,923,000)		(218,260,000)
Impairment charges (a)																	(190,218,000)		(59,569,000)		(32,763,000)
Other expense, net																	(533,000)		(7,687,000)		(4,010,000)
Income from continuing operations																	225,502,000		266,548,000		237,780,000
Discontinued Operations:
Net income																	241,353,000		280,275,000		182,090,000
Preferred Equity Investments [Member]
Note 8 - Other Real Estate Investments (Details) - Preferred Equity Investments - Income Statement Disclosures [Line Items]
Revenues from rental property																	159,500,000		195,000,000		233,100,000
Operating expenses																	(34,800,000)		(44,700,000)		(57,000,000)
Interest expense																	(55,200,000)		(72,000,000)		(89,500,000)
Depreciation and amortization																	(24,000,000)		(33,700,000)		(43,600,000)
Impairment charges (a)																		[2]	(2,700,000)	[2]		[2]
Other expense, net																	(7,100,000)		(8,300,000)		(6,300,000)
Income from continuing operations																	38,400,000		33,600,000		36,700,000
Discontinued Operations:
Gain on disposition of properties																	20,800,000		17,500,000		6,200,000
Net income																	$ 59,200,000		$ 51,100,000		$ 42,900,000

[1] All periods have been adjusted to reflect the impact of operating properties sold during 2013 and 2012 and properties classified as held-for-sale as of December 31, 2013, which are reflected in the caption Discontinued operations on the accompanying Consolidated Statements of Income.

[2] Represents an impairment charge against one master leased pool due to decline in fair market value.