CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investment in real estate
Land	$ 6,295,404	$ 6,192,512
Depreciable property	19,851,504	19,226,047
Projects under development	1,343,919	988,867
Land held for development	184,556	393,522
Investment in real estate	27,675,383	26,800,948
Accumulated depreciation	(5,432,805)	(4,807,709)
Investment in real estate, net	22,242,578	21,993,239
Cash and cash equivalents	40,080	53,534
Investments in unconsolidated entities	105,434	178,526
Deposits - restricted	72,303	103,567
Escrow deposits - mortgage	48,085	42,636
Deferred financing costs, net	58,380	58,486
Other assets	383,754	404,557
Total assets	22,950,614	22,834,545
Liabilities:
Mortgage notes payable	5,086,515	5,174,166
Notes, net	5,425,346	5,477,088
Lines of credit	333,000	115,000
Accounts payable and accrued expenses	153,590	118,791
Accrued interest payable	89,540	78,309
Other liabilities	389,915	347,748
Security deposits	75,633	71,592
Distributions payable	188,566	243,511
Total liabilities	11,742,105	11,626,205
Redeemable Noncontrolling Interests - Operating Partnership	500,733	363,144
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, 2014 and December 31, 2013	50,000	50,000
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 362,855,454 shares issued and outstanding as of December 31, 2014 and 360,479,260 shares issued and outstanding as of December 31, 2013	3,629	3,605
Paid in capital	8,536,340	8,561,500
Retained earnings	1,950,639	2,047,258
Accumulated other comprehensive (loss)	(172,152)	(155,162)
Total shareholders' equity	10,368,456	10,507,201
Noncontrolling Interests:
Operating Partnership	214,411	211,412
Partially Owned Properties	124,909	126,583
Total Noncontrolling Interests	339,320	337,995
Total equity	10,707,776	10,845,196
Total liabilities and equity	$ 22,950,614	$ 22,834,545