Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Operating (including $1,676,866 and $1,701,804 of consolidated variable interest entities, respectively)	$ 7,535,983	$ 7,307,622
Construction-in-progress (including $102,583 and $51,313 of consolidated variable interest entities, respectively)	760,420	495,274
Assets held for sale	1,729	16,576
Real estate, at cost, total	8,298,132	7,819,472
Less accumulated depreciation and amortization (including $296,165 and $292,374 of consolidated variable interest entities, respectively)	(2,215,413)	(2,059,143)
Net real estate	6,082,719	5,760,329
Cash and cash equivalents	127,432	64,087
Accounts and notes receivable	152,572	142,237
Mortgage notes receivable, net	30,429	30,429
Investment in partnerships	28,604	26,859
Operating Lease, Right-of-Use Asset	93,774	0
Finance Lease, Right-of-Use Asset	52,402	0
Prepaid expenses and other assets	227,060	265,703
TOTAL ASSETS	6,794,992	6,289,644
Liabilities
Mortgages payable, net (including $469,184 and $444,388 of consolidated variable interest entities, respectively)	545,679	474,379
Capital lease obligations	0	71,519
Notes payable	3,781	279,027
Senior notes and debentures, net	2,807,134	2,404,279
Accounts payable and accrued expenses	255,503	177,922
Dividends payable	81,676	78,207
Security deposits payable	21,701	17,875
Operating Lease, Liability	73,628	0
Finance Lease, Liability	72,062	0
Other liabilities and deferred credits	157,938	182,898
Total liabilities	4,019,102	3,686,106
Commitments and contingencies (Note 7)
Redeemable noncontrolling interests	139,758	136,208
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 75,540,804 and 74,249,633 shares issued and outstanding, respectively	759	745
Additional paid-in capital	3,166,522	3,004,442
Accumulated dividends in excess of net income	(791,124)	(818,877)
Accumulated other comprehensive loss	(813)	(416)
Total shareholders’ equity of the Trust	2,535,341	2,345,891
Noncontrolling interests	100,791	121,439
Total shareholders’ equity	2,636,132	2,467,330
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	6,794,992	6,289,644
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