Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows - Operating Activities
Net income	$ 15,839,000	$ 11,669,000
Adjustments to net income:
Depreciation and amortization including intangible assets and deferred financing costs	33,803,000	7,881,000
(Income) loss from equity investments in real estate and the Managed REITs in excess of distributions received	(991,000)	(1,716,000)
Straight-line rent, financing lease adjustments and amortization of rent-related intangibles	4,459,000	(1,135,000)
Amortization of dererred revenue	(2,359,000)	(2,359,000)
Loss on sale of real estate	931,000	181,000
Unrealized gain on foreign currency transactions and others	(1,002,000)	(212,000)
Realized loss (gain) on foreign currency transactions and others	100,000	(75,000)
Management income received in shares of Managed REITs	(9,942,000)	(6,889,000)
Impairment charges	3,279,000	5,724,000
Stock-based compensation expense	9,149,000	5,261,000
Deferred acquisition revenue received	8,561,000	8,722,000
Increase in structuring revenue receivable	(1,437,000)	(3,916,000)
(Decrease) increase in income taxes, net	(4,144,000)	1,317,000
Increase in prepaid taxes	(15,721,000)	(6,980,000)
Net changes in other operating assets and liabilities	(23,050,000)	(21,533,000)
Net cash provided by (used in) operating activities	17,475,000	(4,060,000)
Cash Flows - Investing Activities
Distributions received from equity investments in real estate and the Managed REITs in excess of equity income	11,955,000	7,370,000
Capital contributions to equity investments	(1,418,000)	(90,000)
Purchases of real estate	(71,131,000)
Capital expenditures	(1,826,000)	(1,481,000)
Proceeds from sale of real estate	11,065,000	2,422,000
Other investing activities, net	0	11,000
Funds placed in escrow	(27,128,000)	(722,000)
Funds released from escrow	50,749,000	1,954,000
Net cash (used in) provided by investing activities	(27,734,000)	9,464,000
Cash Flows - Financing Activities
Distributions paid	(45,746,000)	(22,792,000)
Contributions from noncontrolling interests	2,463,000	750,000
Distributions paid to noncontrolling interests	(9,232,000)	(992,000)
Scheduled payments of mortgage principal	(102,612,000)	(2,357,000)
Proceeds from mortgage financing	99,000,000
Proceeds from senior credit facility	55,000,000	15,000,000
Repayments of senior credit facility	(10,000,000)
Payment of financing costs and mortgage deposits, net of deposits refunded	(570,000)	(75,000)
Funds placed in escrow	43,000
Proceeds from exercise of stock options	25,000	4,249,000
Payment of tax withholding liability related to stock-based compensation awards		2,553,000
Windfall tax benefit associated with stock-based compensation awards	10,764,000	4,597,000
Net cash provided by (used in) financing activities	(865,000)	(4,173,000)
Change in Cash and Cash Equivalents During the Period
Effect of exchange rate changes on cash	(1,216,000)	185,000
Net (decrease) increase in cash and cash equivalents	(12,340,000)	1,416,000
Cash and cash equivalents, beginning of period	123,904,000	29,297,000
Cash and cash equivalents, end of period	111,564,000	30,713,000
Supplemental noncash investing and financing activities
Reclassifcation To (From) Net Direct Financing Lease	5,600,000
Dividends Payable Current And Noncurrent	$ 57,128,000