Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Operating (including $2,207,648 and $1,703,202 of consolidated variable interest entities, respectively)	$ 8,814,791	$ 7,771,981
Construction-in-progress (including $18,752 and $44,896 of consolidated variable interest entities, respectively)	607,271	810,889
Real estate, at cost, total	9,422,062	8,582,870
Less accumulated depreciation and amortization (including $389,950 and $335,735 of consolidated variable interest entities, respectively)	(2,531,095)	(2,357,692)
Net real estate	6,890,967	6,225,178
Cash and cash equivalents	162,132	798,329
Accounts and notes receivable	169,007	159,780
Mortgage notes receivable, net	9,543	39,892
Investment in partnerships	13,027	22,128
Operating lease right of use assets	90,743	92,248
Finance lease right of use assets	49,832	51,116
Prepaid expenses and other assets	237,069	218,953
TOTAL ASSETS	7,622,320	7,607,624
Liabilities
Mortgages payable, net (including $335,301 and $413,681 of consolidated variable interest entities, respectively)	339,993	484,111
Notes payable, net	301,466	402,776
Senior notes and debentures, net	3,406,088	3,404,488
Accounts payable and accrued expenses	235,168	228,641
Dividends payable	86,538	83,839
Security deposits payable	25,331	20,388
Operating lease liabilities	72,661	72,441
Finance lease liabilities	72,032	72,049
Other liabilities and deferred credits	206,187	152,424
Total liabilities	4,745,464	4,921,157
Commitments and contingencies (Note 7)
Redeemable noncontrolling interests	213,708	137,720
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 78,603,305 and 76,727,394 shares issued and outstanding, respectively	790	771
Additional paid-in capital	3,488,794	3,297,305
Accumulated dividends in excess of net income	(1,066,932)	(988,272)
Accumulated other comprehensive loss	(2,047)	(5,644)
Total shareholders’ equity of the Trust	2,580,602	2,464,157
Noncontrolling interests	82,546	84,590
Total shareholders’ equity	2,663,148	2,548,747
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	7,622,320	7,607,624
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