CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Investment in real estate
Land	$ 4,161,358	$ 4,110,275
Depreciable property	15,046,250	15,226,512
Projects under development	115,085	130,337
Land held for development	214,495	235,247
Investment in real estate	19,537,188	19,702,371
Accumulated depreciation	(4,307,406)	(4,337,357)
Investment in real estate, net	15,229,782	15,365,014
Cash and cash equivalents	604,764	431,408
Investments in unconsolidated entities	3,623	3,167
Deposits - restricted	361,831	180,987
Escrow deposits - mortgage	10,905	12,593
Deferred financing costs, net	35,451	42,033
Other assets	151,766	148,992
Total assets	16,398,122	16,184,194
Liabilities:
Mortgage notes payable	4,352,372	4,762,896
Notes, net	5,096,250	5,185,180
Lines of credit	0	0
Accounts payable and accrued expenses	69,118	39,452
Accrued interest payable	92,584	98,631
Other liabilities	306,503	304,202
Security deposits	60,779	60,812
Distributions payable	106,566	140,905
Total liabilities	10,084,172	10,592,078
Commitments and contingencies
Redeemable Noncontrolling Interests - Operating Partnership	438,141	383,540
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,600,000 shares issued and outstanding as of June 30, 2011 and December 31, 2010	200,000	200,000
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 296,280,085 shares issued and outstanding as of June 30, 2011 and 290,197,242 shares issued and outstanding as of December 31, 2010	2,963	2,902
Paid in capital	4,947,467	4,741,521
Retained earnings	680,619	203,581
Accumulated other comprehensive (loss)	(80,553)	(57,818)
Total shareholders' equity	5,750,496	5,090,186
Noncontrolling Interests:
Operating Partnership	122,018	110,399
Partially Owned Properties	3,295	7,991
Total Noncontrolling Interests	125,313	118,390
Total equity	5,875,809	5,208,576
Total liabilities and equity	$ 16,398,122	$ 16,184,194