Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Operating activities
Net income	$ 118,018,000		$ 82,758,000
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and amortization	185,821,000		91,032,000
Other amortization expenses	7,900,000		8,047,000
Provision for loan losses	416,000
Impairment of assets	202,000
Stock-based compensation expense	7,274,000		8,747,000
Loss (gain) on extinguishment of debt			25,072,000
Income from unconsolidated joint ventures	(2,514,000)		(2,596,000)
Rental income in excess of cash received	(9,304,000)		(4,530,000)
Amortization related to above (below) market leases, net	(1,056,000)		(1,296,000)
Loss (gain) on sales of properties	(56,380,000)		(10,033,000)
Increase (decrease) in accrued expenses and other liabilities	38,416,000		5,552,000
Decrease (increase) in receivables and other assets	(47,195,000)		(11,247,000)
Net cash provided from (used in) operating activities	241,598,000		191,506,000
Investing activities
Investment in real property, net of cash acquired	(3,370,597,000)		(389,873,000)
Capitalized interest	(6,979,000)		(12,352,000)
Investment in real estate loans receivable	(28,467,000)		(41,784,000)
Other investments, net of payments	1,743,000		(10,051,000)
Principal collected on real estate loans receivable	138,396,000		9,420,000
Contributions to unconsolidated joint ventures	(779,000)		(174,574,000)
Distributions from unconsolidated joint ventures	1,069,000
Decrease (increase) in restricted cash	42,023,000		(36,418,000)
Proceeds from sales of real property	208,692,000		54,492,000
Net cash provided from (used in) investing activities	(3,014,899,000)		(601,140,000)
Financing activities
Net increase (decrease) under unsecured lines of credit arrangements	(300,000,000)		66,000,000
Proceeds from issuance of senior unsecured notes	1,381,086,000		932,412,000
Payments to extinguish senior unsecured notes			(495,542,000)
Net proceeds from the issuance of secured debt	58,470,000		79,127,000
Payments on secured debt	(13,081,000)		(7,704,000)
Net proceeds from the issuance of common stock	1,421,495,000		37,560,000
Net proceeds from the issuance of preferred stock	696,437,000
Decrease (increase) in deferred loan expenses	(11,603,000)		(1,887,000)
Contributions by noncontrolling interests	9,087,000	[1]	2,271,000	[1]
Distributions to noncontrolling interests	(16,804,000)	[1]	(2,594,000)	[1]
Cash distributions to stockholders	(254,598,000)		(180,062,000)
Net cash provided from (used in) financing activities	2,970,489,000		429,581,000
Increase (decrease) in cash and cash equivalents	197,188,000		19,947,000
Cash and cash equivalents at beginning of period	131,570,000	[2]	35,476,000
Cash and cash equivalents at end of period	328,758,000		55,423,000
Supplemental cash flow information:
Interest paid	112,711,000		71,027,000
Income taxes paid	$ 31,000		$ 149,000

[1] Includes amounts attributable to redeemable noncontrolling interests.

[2] NOTE: The consolidated balance sheet at December 31, 2010 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.