CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 95,111	$ 113,105
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	123,324	117,575
Net amortization of debt discounts, premiums and deferred financing fees	5,467	5,644
Amortization of acquired real estate leases	33,654	23,420
Other amortization	12,186	12,216
Loss on asset impairment	9,247	21,491
(Gain) loss on early extinguishment of debt	(310)	1,044
Equity in earnings of investees	(8,390)	(6,643)
Gain on issuance of shares by an equity investee	(11,177)	(34,808)
Distributions of earnings from investees	8,279	6,660
Gain on sale of properties	(41,573)	(38,904)
Change in assets and liabilities:
(Increase) decrease in restricted cash	(5,020)	5,808
Increase in rents receivable and other assets	(56,972)	(36,581)
Increase (decrease) in accounts payable and accrued expenses	15,356	(10,951)
Increase in rent collected in advance	6,667	2,049
Increase (decrease) in security deposits	2,072	(59)
Increase in due to related persons	18,271	17,293
Cash provided by operating activities	206,192	198,359
Cash flows from investing activities:
Real estate acquisitions and improvements	(829,520)	(406,983)
Investment in direct financing lease, net	(38,635)
Principal payments received from direct financing lease	3,643
Principal payments received from real estate mortgage receivable	8,183
Proceeds from investment in marketable pass through certificates		8,000
Proceeds from sale of properties, net	263,170	230,911
Distributions in excess of earnings from investees	4,159	5,379
Investment in Affiliates Insurance Company		(75)
Increase in restricted cash		(1,221)
Cash used in investing activities	(589,000)	(163,989)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	264,056	430,778
Proceeds from issuance of preferred shares, net	265,391
Proceeds from borrowings	750,000	1,148,632
Payments on borrowings	(738,904)	(1,317,027)
Deferred financing fees	(853)	(9,565)
Distributions to common shareholders	(108,213)	(90,168)
Distributions to preferred shareholders	(30,582)	(38,001)
Purchase of noncontrolling equity interest		(2,500)
Cash provided by financing activities	400,895	122,149
Effect of exchange rate changes on cash	(1,454)
Increase in cash and cash equivalents	16,633	156,519
Cash and cash equivalents at beginning of period	194,040	18,204
Cash and cash equivalents at end of period	210,673	174,723
Supplemental cash flow information:
Interest paid	151,259	142,311
Taxes paid	403	543
Non-cash investing activities:
Real estate acquisitions	(321,235)
Investment in real estate mortgage receivable		(8,288)
Non-cash financing activities:
Issuance of common shares	1,039	896
Assumption of mortgage notes payable	$ 321,235