CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investment in real estate
Land	$ 6,192,512	$ 4,554,912
Depreciable property	19,226,047	15,711,944
Projects under development	988,867	387,750
Land held for development	393,522	353,823
Real Estate Investment Property, at Cost	26,800,948	21,008,429
Real Estate Investment Property, Accumulated Depreciation	(4,807,709)	(4,912,221)
Investment in real estate, net	21,993,239	16,096,208
Cash and cash equivalents	53,534	612,590
Investments in unconsolidated entities	178,526	17,877
Deposits - restricted	103,567	250,442
Escrow deposits - mortgage	42,636	9,129
Deferred financing costs, net	58,486	44,382
Other assets	404,557	170,372
Total assets	22,834,545	17,201,000
Liabilities:
Mortgage notes payable	5,174,166	3,898,369
Notes, net	5,477,088	4,630,875
Lines of credit	115,000	0
Accounts payable and accrued expenses	118,791	38,372
Accrued interest payable	78,309	76,223
Other liabilities	347,748	304,518
Security deposits	71,592	66,988
Distributions payable	243,511	260,176
Total liabilities	11,626,205	9,275,521
Redeemable Noncontrolling Interests - Operating Partnership	363,144	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 December 31, 2013 and December 31, 2012	50,000	50,000
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 360,479,260 shares issued and outstanding as of December 31, 2013 and 325,054,654 shares issued and outstanding as of December 31, 2012	3,605	3,251
Paid in capital	8,561,500	6,542,355
Retained earnings	2,047,258	887,355
Accumulated other comprehensive (loss)	(155,162)	(193,148)
Total shareholders' equity	10,507,201	7,289,813
Noncontrolling Interests:
Operating Partnership	211,412	159,606
Partially Owned Properties	126,583	77,688
Total Noncontrolling Interests	337,995	237,294
Total equity	10,845,196	7,527,107
Total liabilities and equity	$ 22,834,545	$ 17,201,000