Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Operating (including $1,709,234 and $1,676,866 of consolidated variable interest entities, respectively)	$ 7,817,819	$ 7,535,983
Construction-in-progress (including $81,463 and $102,583 of consolidated variable interest entities, respectively)	769,668	760,420
Assets held for sale	0	1,729
Real estate, at cost, total	8,587,487	8,298,132
Less accumulated depreciation and amortization (including $314,866 and $296,165 of consolidated variable interest entities, respectively)	(2,339,664)	(2,215,413)
Net real estate	6,247,823	6,082,719
Cash and cash equivalents	863,279	127,432
Accounts and notes receivable, net	164,882	152,572
Mortgage notes receivable, net	39,905	30,429
Investment in partnerships	22,093	28,604
Operating lease right of use assets	92,837	93,774
Finance lease right of use assets	51,437	52,402
Prepaid expenses and other assets	229,037	227,060
TOTAL ASSETS	7,711,293	6,794,992
Liabilities
Mortgages payable, net (including $474,775 and $469,184 of consolidated variable interest entities, respectively)	549,445	545,679
Notes payable, net	402,580	3,781
Senior notes and debentures, net	3,508,824	2,807,134
Accounts payable and accrued expenses	276,396	255,503
Dividends payable	82,688	81,676
Security deposits payable	19,693	21,701
Operating lease liabilities	72,921	73,628
Finance lease liabilities	72,052	72,062
Other liabilities and deferred credits	148,889	157,938
Total liabilities	5,133,488	4,019,102
Commitments and contingencies (Note 6)
Redeemable noncontrolling interests	159,721	139,758
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 75,641,074 and 75,540,804 shares issued and outstanding, respectively	760	759
Additional paid-in capital	3,174,066	3,166,522
Accumulated dividends in excess of net income	(999,664)	(791,124)
Accumulated other comprehensive loss	(7,300)	(813)
Total shareholders’ equity of the Trust	2,327,859	2,535,341
Noncontrolling interests	90,225	100,791
Total shareholders’ equity	2,418,084	2,636,132
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	7,711,293	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