Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
ASSETS
Property	$ 4,425,127		$ 4,399,850
Accumulated Depreciation	(1,073,361)		(1,040,839)
Property, net	3,351,766	[1]	3,359,011	[1]
Investment in Real Estate Joint Ventures and Partnerships, net	279,384		289,049
Total	3,631,150		3,648,060
Notes Receivable from Real Estate Joint Ventures and Partnerships	89,013		89,776
Unamortized Debt and Lease Costs, net	137,646		135,783
Accrued Rent and Accounts Receivable (net of allowance for doubtful accounts of $11,904 in 2013 and $12,127 in 2012)	70,428	[1]	79,540	[1]
Cash and Cash Equivalents	54,800	[1]	19,604	[1]
Restricted Deposits and Mortgage Escrows	43,535		44,096
Other, net	164,396		167,925
Total Assets	4,190,968		4,184,784
LIABILITIES AND EQUITY
Debt, net	2,323,620	[1]	2,204,030	[1]
Accounts Payable and Accrued Expenses	87,947		119,699
Other, net	111,661		120,900
Total Liabilities	2,523,228		2,444,629
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: 121,758 in 2013 and 121,505 in 2012	3,671		3,663
Additional Paid-In Capital	1,868,215		1,934,183
Net Income Less Than Accumulated Dividends	(339,439)		(335,980)
Accumulated Other Comprehensive Loss	(25,829)		(24,743)
Total Shareholders' Equity	1,506,622		1,577,130
Noncontrolling Interests	161,118		163,025
Total Equity	1,667,740		1,740,155
Total Liabilities and Equity	4,190,968		4,184,784
Consolidated Variable Interest Entities' Assets and Liabilities included in the above balances (See Note 17):
Property, net	224,982		226,685
Accrued Rent and Accounts Receivable, net	6,504		8,095
Cash and Cash Equivalents	10,317		11,706
Debt, net	$ 275,671		$ 276,420

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