Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Property	$ 4,187,531	$ 4,246,334
Accumulated Depreciation	(1,193,095)	(1,161,970)
Property, net *	2,994,436	3,084,364
Investment in Real Estate Joint Ventures and Partnerships, net	362,132	369,038
Total	3,356,568	3,453,402
Unamortized Lease Costs, net	161,040	174,152
Accrued Rent, Accrued Contract Receivables and Accounts Receivable, net*	70,039	81,016
Cash and Cash Equivalents *	73,344	35,418
Restricted Deposits and Escrows	11,702	12,338
Other, net	209,080	205,074
Total Assets	3,881,773	3,961,400
LIABILITIES AND EQUITY
Debt, net *	1,786,962	1,838,419
Accounts Payable and Accrued Expenses	95,979	104,990
Other, net	218,369	217,489
Total Liabilities	2,101,310	2,160,898
Commitments and Contingencies (see Note 12)	0	0
Shareholders' Equity:
Common Shares of Beneficial Interest - par value, $.03 per share; shares authorized: 275,000; shares issued and outstanding:127,645 in 2021 and 127,313 in 2020	3,876	3,866
Additional Paid-In Capital	1,763,163	1,755,770
Net Income Less Than Accumulated Dividends	(155,730)	(128,813)
Accumulated Other Comprehensive Loss	(11,947)	(12,050)
Total Shareholders' Equity	1,599,362	1,618,773
Noncontrolling Interests	181,101	181,729
Total Equity	1,780,463	1,800,502
Total Liabilities and Equity	3,881,773	3,961,400
Consolidated Variable Interest Entities [Member]
ASSETS
Property, net *	181,628	193,271
Accrued Rent, Accrued Contract Receivables and Accounts Receivable, net*	8,236	9,489
Cash and Cash Equivalents *	9,478	10,089
Total Assets	211,869	225,719
LIABILITIES AND EQUITY
Debt, net *	$ 43,756	$ 44,177