CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS:
Property, net	$ 7,479,546	$ 6,079,043
Cash and cash equivalents	65,793	67,248
Restricted cash	78,658	68,628
Marketable securities	23,667	24,833
Tenant and other receivables, net	103,744	109,092
Deferred charges and other assets, net	565,130	483,763
Loans to unconsolidated joint ventures	3,345	3,995
Due from affiliates	17,068	3,387
Investments in unconsolidated joint ventures	974,258	1,098,560
Total assets	9,311,209	7,938,549
Mortgage notes payable:
Related parties	274,609	279,430
Others	4,162,734	3,049,008
Total	4,437,343	3,328,438
Bank and other notes payable	824,027	877,636
Accounts payable and accrued expenses	70,251	72,870
Other accrued liabilities	318,174	299,098
Distributions in excess of investments in unconsolidated joint ventures	152,948	70,685
Co-venture obligation	92,215	125,171
Total liabilities	5,894,958	4,773,898
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 250,000,000 shares authorized, 137,507,010 and 132,153,444 shares issued and outstanding at December 31, 2012 and 2011, respectively	1,375	1,321
Additional paid-in capital	3,715,895	3,490,647
Accumulated deficit	(639,741)	(678,631)
Total stockholders' equity	3,077,529	2,813,337
Noncontrolling interests	338,722	351,314
Total equity	3,416,251	3,164,651
Total liabilities and equity	$ 9,311,209	$ 7,938,549