Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Operating (including $1,699,440 and $1,701,804 of consolidated variable interest entities, respectively)	$ 7,293,205	$ 7,307,622
Construction-in-progress (including $62,037 and $51,313 of consolidated variable interest entities, respectively)	540,192	495,274
Assets held for sale	10,771	16,576
Real estate, at cost, total	7,844,168	7,819,472
Less accumulated depreciation and amortization (including $301,029 and $292,374 of consolidated variable interest entities, respectively)	(2,105,159)	(2,059,143)
Net real estate	5,739,009	5,760,329
Cash and cash equivalents	43,003	64,087
Accounts and notes receivable, net	137,779	142,237
Mortgage notes receivable, net	30,429	30,429
Investment in partnerships	30,530	26,859
Operating lease right of use assets	95,402	0
Finance lease right of use assets	53,365	0
Prepaid expenses and other assets	221,849	265,703
TOTAL ASSETS	6,351,366	6,289,644
Liabilities
Mortgages payable, net (including $441,107 and $444,388 of consolidated variable interest entities, respectively)	452,466	474,379
Capital lease obligations	0	71,519
Notes payable, net	299,106	279,027
Senior notes and debentures, net	2,404,987	2,404,279
Accounts payable and accrued expenses	156,029	177,922
Dividends payable	78,547	78,207
Security deposits payable	19,381	17,875
Operating lease liabilities	75,057	0
Finance lease liabilities	72,071	0
Other liabilities and deferred credits	157,451	182,898
Total liabilities	3,715,095	3,686,106
Commitments and contingencies (Note 6)
Redeemable noncontrolling interests	134,708	136,208
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 74,836,984 and 74,249,633 shares issued and outstanding, respectively	752	745
Additional paid-in capital	3,071,981	3,004,442
Accumulated dividends in excess of net income	(843,947)	(818,877)
Accumulated other comprehensive loss	(625)	(416)
Total shareholders’ equity of the Trust	2,388,158	2,345,891
Noncontrolling interests	113,405	121,439
Total shareholders’ equity	2,501,563	2,467,330
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	6,351,366	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