Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
ASSETS
Property	$ 4,827,374		$ 4,777,794
Accumulated Depreciation	(1,025,170)		(971,249)
Property, net	3,802,204	[1]	3,806,545	[1]
Investment in Real Estate Joint Ventures and Partnerships, net	345,404		347,526
Total	4,147,608		4,154,071
Notes Receivable from Real Estate Joint Ventures and Partnerships	159,760		184,788
Unamortized Debt and Lease Costs, net	120,625		116,437
Accrued Rent and Accounts Receivable (net of allowance for doubtful accounts of $10,332 in 2011 and $10,137 in 2010)	78,145	[1]	95,859	[1]
Cash and Cash Equivalents	24,374	[1]	23,859	[1]
Restricted Deposits and Mortgage Escrows	32,003		10,208
Other, net	193,263		222,633
Total Assets	4,755,778		4,807,855
LIABILITIES AND EQUITY
Debt, net	2,615,976	[1]	2,589,448	[1]
Accounts Payable and Accrued Expenses	108,929		126,767
Other, net	109,287		111,383
Total Liabilities	2,834,192		2,827,598
Commitments and Contingencies
Shareholders' Equity:
Common Shares of Beneficial Interest - par value, $.03 per share; shares authorized: 275,000; shares issued and outstanding: 120,822 in 2011 and 120,492 in 2010	3,640		3,630
Accumulated Additional Paid-In Capital	1,980,285		1,969,905
Net Income Less Than Accumulated Dividends	(218,126)		(151,780)
Accumulated Other Comprehensive Loss	(20,826)		(21,774)
Total Shareholders' Equity	1,744,981		1,799,989
Noncontrolling Interests	176,605		180,268
Total Equity	1,921,586		1,980,257
Total Liabilities and Equity	4,755,778		4,807,855
Consolidated Variable Interest Entities' Assets and Liabilities included in the above balances (See Note 3):
Property, net	231,641		233,706
Accrued Rent and Accounts Receivable, net	6,751		9,514
Cash and Cash Equivalents	9,350		10,397
Debt, net	280,683		281,519
6.75% Series D Preferred Shares [Member]
Shareholders' Equity:
Cumulative redeemable preferred shares of beneficial interest, value	3		3
6.95% Series E Preferred Shares [Member]
Shareholders' Equity:
Cumulative redeemable preferred shares of beneficial interest, value	1		1
6.5% Series F Preferred Shares [Member]
Shareholders' Equity:
Cumulative redeemable preferred shares of beneficial interest, value	$ 4		$ 4

[1] Consolidated Variable Interest Entities' Assets and Liabilities included in the above balances (See Note 3):