Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Operating (including $1,656,951 and $1,639,486 of consolidated variable interest entities, respectively)	$ 7,051,962	$ 6,950,188
Construction-in-progress (including $39,171 and $43,393 of consolidated variable interest entities, respectively)	633,090	684,873
Assets held for sale	36,905	0
Real estate, at cost, total	7,721,957	7,635,061
Less accumulated depreciation and amortization (including $257,604 and $247,410 of consolidated variable interest entities, respectively)	(1,922,110)	(1,876,544)
Net real estate	5,799,847	5,758,517
Cash and cash equivalents	64,407	15,188
Accounts and notes receivable, net	143,148	209,877
Mortgage notes receivable, net	30,429	30,429
Investment in real estate partnerships	23,513	23,941
Prepaid expenses and other assets	232,281	237,803
TOTAL ASSETS	6,293,625	6,275,755
Liabilities
Mortgages payable, net (including $448,641 and $460,372 of consolidated variable interest entities, respectively)	479,333	491,505
Capital lease obligations	71,547	71,556
Notes payable, net	382,396	320,265
Senior notes and debentures, net	2,402,138	2,401,440
Accounts payable and accrued expenses	181,361	196,332
Dividends payable	75,667	75,931
Security deposits payable	17,072	16,667
Other liabilities and deferred credits	169,460	169,388
Total liabilities	3,778,974	3,743,084
Commitments and contingencies (Note 6)
Redeemable noncontrolling interests	141,541	141,157
Shareholders’ equity
Common shares of beneficial interest, $.01 par, 100,000,000 shares authorized, 73,216,520 and 73,090,877 shares issued and outstanding, respectively	735	733
Additional paid-in capital	2,859,717	2,855,321
Accumulated dividends in excess of net income	(769,311)	(749,367)
Accumulated other comprehensive income	489	22
Total shareholders’ equity of the Trust	2,251,627	2,266,706
Noncontrolling interests	121,483	124,808
Total shareholders’ equity	2,373,110	2,391,514
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	6,293,625	6,275,755
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