Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
ASSETS
Property	$ 4,392,028		$ 4,688,526
Accumulated Depreciation	(1,013,294)		(1,059,531)
Property Held for Sale, net	73,404		73,241
Property, net	3,452,138	[1]	3,702,236	[1]
Investment in Real Estate Joint Ventures and Partnerships, net	300,471		341,608
Total	3,752,609		4,043,844
Notes Receivable from Real Estate Joint Ventures and Partnerships	90,385		149,204
Unamortized Debt and Lease Costs, net	138,718		115,191
Accrued Rent and Accounts Receivable (net of allowance for doubtful accounts of $11,693 in 2012 and $11,301 in 2011)	77,741	[1]	86,530	[1]
Cash and Cash Equivalents	19,089	[1]	13,642	[1]
Restricted Deposits and Mortgage Escrows	13,813		11,144
Other, net	170,304		168,671
Total Assets	4,262,659		4,588,226
LIABILITIES AND EQUITY
Debt, net	2,227,419	[1]	2,531,837	[1]
Accounts Payable and Accrued Expenses	117,956		124,888
Other, net	120,433		107,919
Total Liabilities	2,465,808		2,764,644
Commitments and Contingencies	0		0
Shareholders' Equity:
Common Shares of Beneficial Interest - par value, $.03 per share; shares authorized: 275,000; shares issued and outstanding: 121,350 in 2012 and 120,844 in 2011	3,658		3,641
Additional Paid-In Capital	1,997,230		1,983,978
Net Income Less Than Accumulated Dividends	(343,688)		(304,504)
Accumulated Other Comprehensive Loss	(25,939)		(27,743)
Total Shareholders' Equity	1,631,269		1,655,380
Noncontrolling Interests	165,582		168,202
Total Equity	1,796,851		1,823,582
Total Liabilities and Equity	4,262,659		4,588,226
* Consolidated Variable Interest Entities' Assets and Liabilities included in the above balances (See Note 17):
Property, net	226,235		230,159
Accrued Rent and Accounts Receivable, net	8,664		8,564
Cash and Cash Equivalents	10,309		11,382
Debt, net	277,156		279,301
6.75% Series D Preferred Shares [Member]
Shareholders' Equity:
Preferred Shares of Beneficial Interest; value	3		3
6.95% Series E Preferred Shares [Member]
Shareholders' Equity:
Preferred Shares of Beneficial Interest; value	1		1
6.5% Series F Preferred Shares [Member]
Shareholders' Equity:
Preferred Shares of Beneficial Interest; value	$ 4		$ 4

[1] * Consolidated Variable Interest Entities’ Assets and Liabilities included in the above balances (See Note 17):