CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 45,160	$ 66,576
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	90,680	80,722
Net amortization of debt discounts, premiums and deferred financing fees	1,751	3,952
Straight line rental income	(17,991)	(16,017)
Amortization of acquired real estate leases	29,422	20,145
Other amortization	9,815	8,094
Loss on early extinguishment of debt	1,675
Equity in earnings of investees	(5,787)	(5,622)
Distributions of earnings from investees	5,592	5,539
Net gain on sale of properties	(350)	(34,572)
Change in assets and liabilities:
Increase in restricted cash	(4,339)	(27)
Increase in rents receivable and other assets	(17,943)	(8,407)
Increase in accounts payable and accrued expenses	2,429	4,964
(Decrease) increase in rent collected in advance	(5,493)	2,602
Increase in security deposits	713	772
Increase in due to related persons	3,369	2,622
Cash provided by operating activities	138,703	131,343
CASH FLOWS FROM INVESTING ACTIVITIES:
Real estate acquisitions	(253,710)	(499,490)
Real estate improvements	(50,636)	(41,264)
Investment in direct financing lease, net		(38,635)
Principal payments received from direct financing lease	3,283	2,050
Principal payments received from real estate mortgage receivable		209
Proceeds from sale of properties, net	338	97,362
Distributions in excess of earnings from investees	2,766	2,720
Investment in Affiliates Insurance Company	(5,335)
Increase in restricted cash	(2,121)
Cash used in investing activities	(305,415)	(477,048)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common shares, net	180,814
Proceeds from issuance of preferred shares, net		265,804
Proceeds from borrowings	444,500	485,000
Payments on borrowings	(395,250)	(454,596)
Deferred financing fees	(6,049)	(273)
Distributions to common shareholders	(83,722)	(72,139)
Distributions to preferred shareholders	(27,466)	(17,679)
Cash provided by financing activities	112,827	206,117
Effect of exchange rate changes on cash	(73)	583
Decrease in cash and cash equivalents	(53,958)	(139,005)
Cash and cash equivalents at beginning of period	192,763	194,040
Cash and cash equivalents at end of period	138,805	55,035
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	99,227	91,033
Taxes paid	536	381
NON-CASH INVESTING ACTIVITIES:
Real estate acquisitions	(176,884)	(60,294)
Investment in real estate mortgages receivable	(1,419)
NON-CASH FINANCING ACTIVITIES:
Issuance of common shares	187	265
Assumption of mortgage notes payable	176,884	56,235
Assumption of note payable		$ 4,059