Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Operating (including $1,751,718 and $1,676,866 of consolidated variable interest entities, respectively)	$ 7,774,485	$ 7,535,983
Construction-in-progress (including $84,034 and $102,583 of consolidated variable interest entities, respectively)	671,486	760,420
Assets held for sale	5,796	1,729
Real estate, at cost, total	8,451,767	8,298,132
Less accumulated depreciation and amortization (including $306,861 and $296,165 of consolidated variable interest entities, respectively)	(2,258,994)	(2,215,413)
Net real estate	6,192,773	6,082,719
Cash and cash equivalents	994,688	127,432
Accounts and notes receivable, net	153,243	152,572
Mortgage notes receivable, net	30,332	30,429
Investment in partnerships	25,960	28,604
Operating lease right of use assets	94,147	93,774
Finance lease right of use assets	52,079	52,402
Prepaid expenses and other assets	216,692	227,060
TOTAL ASSETS	7,759,914	6,794,992
Liabilities
Mortgages payable, net (including $476,944 and $469,184 of consolidated variable interest entities, respectively)	552,813	545,679
Notes payable, net	993,752	3,781
Senior notes and debentures, net	2,807,848	2,807,134
Accounts payable and accrued expenses	245,968	255,503
Dividends payable	81,899	81,676
Security deposits payable	21,941	21,701
Operating lease liabilities	74,082	73,628
Finance lease liabilities	72,059	72,062
Other liabilities and deferred credits	150,410	157,938
Total liabilities	5,000,772	4,019,102
Commitments and contingencies (Note 6)
Redeemable noncontrolling interests	159,534	139,758
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 75,622,504 and 75,540,804 shares issued and outstanding, respectively	760	759
Additional paid-in capital	3,166,899	3,166,522
Accumulated dividends in excess of net income	(818,284)	(791,124)
Accumulated other comprehensive loss	(7,265)	(813)
Total shareholders’ equity of the Trust	2,502,107	2,535,341
Noncontrolling interests	97,501	100,791
Total shareholders’ equity	2,599,608	2,636,132
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	7,759,914	6,794,992
5.0% Series C Cumulative Redeemable Preferred Shares, (stated at liquidation preference $25,000 per share), 6,000 shares issued and outstanding
Shareholders’ equity
Preferred shares, authorized 15,000,000 shares, $.01 par:	150,000	150,000
5.417% Series 1 Cumulative Convertible Preferred Shares, (stated at liquidation preference $25 per share), 399,896 shares issued and outstanding
Shareholders’ equity
Preferred shares, authorized 15,000,000 shares, $.01 par:	$ 9,997	$ 9,997