CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investment in real estate
Land	$ 6,264,787	$ 4,554,912
Depreciable property	19,568,973	15,711,944
Projects under development	585,749	387,750
Land held for development	569,398	353,823
Real Estate Investment Property, at Cost	26,988,907	21,008,429
Real Estate Investment Property, Accumulated Depreciation	(4,547,327)	(4,912,221)
Investment in real estate, net	22,441,580	16,096,208
Cash and cash equivalents	152,564	612,590
Investments in unconsolidated entities	188,582	17,877
Deposits - restricted	197,267	250,442
Escrow deposits - mortgage	41,357	9,129
Deferred financing costs, net	71,013	44,382
Other assets	390,020	170,372
Total assets	23,482,383	17,201,000
Liabilities:
Mortgage notes payable	6,247,612	3,898,369
Notes, net	5,475,954	4,630,875
Lines of credit	0	0
Accounts payable and accrued expenses	84,603	38,372
Accrued interest payable	86,083	76,223
Other liabilities	318,622	304,518
Security deposits	71,857	66,988
Distributions payable	150,846	260,176
Total liabilities	12,435,577	9,275,521
Commitments and contingencies
Redeemable Noncontrolling Interests - Operating Partnership	407,890	398,372
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of June 30, 2013 and December 31, 2012	50,000	50,000
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 360,312,049 shares issued and outstanding as of June 30, 2013 and 325,054,654 shares issued and outstanding as of December 31, 2012	3,603	3,251
Paid in capital	8,496,027	6,542,355
Retained earnings	1,939,598	887,355
Accumulated other comprehensive (loss)	(166,844)	(193,148)
Total shareholders' equity	10,322,384	7,289,813
Noncontrolling Interests:
Operating Partnership	209,039	159,606
Noncontrolling Interests - Partially Owned Properties	107,493	77,688
Total Noncontrolling Interests	316,532	237,294
Total equity	10,638,916	7,527,107
Total liabilities and equity	$ 23,482,383	$ 17,201,000