Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Real estate assets:
Land	$ 926,198	$ 928,025
Buildings and improvements	7,543,765	7,543,326
Real estate investment property, at cost	8,469,963	8,471,351
Accumulated depreciation	(1,838,515)	(1,721,194)
Real estate investment property, net, before developments in progress	6,631,448	6,750,157
Developments in progress	198,590	139,980
Net investment in real estate assets	6,830,038	6,890,137
Cash and cash equivalents	47,891	50,896
Receivables:
Tenant Receivable, net of allowance for doubtful accounts	72,349	77,989
Other Receivables	12,579	11,996
Mortgage and other notes receivable	26,388	30,519
Investments in unconsolidated affiliates	180,443	179,410
Intangible lease assets and other assets	275,909	265,607
Total assets	7,445,597	7,506,554
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Mortgage and other indebtedness	5,194,097	5,209,747
Accounts payable and accrued liabilities	293,164	314,651
Total liabilities	5,487,261	5,524,398
Redeemable noncontrolling interests:
Redeemable noncontrolling partnership interests	35,306	34,379
Redeemable noncontrolling preferred joint venture interest	423,776	423,834
Total redeemable noncontrolling interests	459,082	458,213
Preferred stock, $.01 par value, 15,000,000 shares authorized:
7.75% Series C Cumulative Redeemable Preferred Stock, 460,000 shares outstanding	5	5
7.375% Series D Cumulative Redeemable Preferred Stock, 1,815,000 shares outstanding	18	18
Common stock, $.01 par value, 350,000,000 shares authorized, 148,361,580 and 147,923,707 issued and outstanding in 2011 and 2010, respectively	1,484	1,479
Additional paid-in capital	1,658,149	1,657,507
Accumulated other comprehensive income	7,665	7,855
Accumulated deficit	(382,322)	(366,526)
Total shareholders' equity	1,284,999	1,300,338
Noncontrolling interests	214,255	223,605
Total equity	1,499,254	1,523,943
Total Liabilities, Redeemable Noncontrolling Interests and Equity	$ 7,445,597	$ 7,506,554