Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property, buildings and equipment:
Land and buildings and improvements, gross value	$ 6,243,574	$ 6,148,812
Accumulated depreciation	(1,441,337)	(1,382,298)
Property, buildings and equipment – net	4,802,237	4,766,514
Operating lease right-of-use assets	320,438	291,797
Accumulated depreciation – operating leases	(31,800)	(24,483)
Operating leases – net	288,638	267,314
Financing leases:
Financing leases - gross	174,830	169,929
Accumulated depreciation – financing leases	(47,783)	(40,937)
Financing leases – net	127,047	128,992
Cash, cash equivalents and restricted cash	287,691	621,051
Accounts receivable – net of allowance of $12,866 and $12,286 at March 31, 2021 and December 31, 2020, respectively	306,970	324,221
Identifiable intangible assets – net	788,044	797,423
Goodwill	800,362	794,335
Investments in partially owned entities	42,376	44,907
Other assets	96,643	86,394
Total assets	7,540,008	7,831,151
Liabilities:
Borrowings under revolving line of credit	43,786	0
Accounts payable and accrued expenses	524,876	552,547
Mortgage notes, senior unsecured notes and term loans – net of unamortized deferred financing costs of $12,474 and $15,952, in the aggregate, at March 31, 2021 and December 31, 2020, respectively	2,416,228	2,648,266
Sale-leaseback financing obligations	181,951	185,060
Financing lease obligations	124,434	125,926
Operating lease obligations	282,226	269,147
Unearned revenue	18,957	19,209
Pension and postretirement benefits	8,980	9,145
Deferred tax liability – net	221,922	220,502
Multi-employer pension plan withdrawal liability	8,441	8,528
Total liabilities	3,831,801	4,038,330
Shareholders’ equity:
Common shares of beneficial interest, $0.01 par value – 500,000,000 and 325,000,000 authorized shares; 252,519,518 and 251,702,603 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	2,525	2,517
Paid-in capital	4,681,809	4,687,823
Accumulated deficit and distributions in excess of net earnings	(965,844)	(895,521)
Accumulated other comprehensive loss	(13,659)	(4,379)
Total shareholders’ equity	3,704,831	3,790,440
Noncontrolling interests:
Noncontrolling interests in operating partnership and consolidated joint venture	3,376	2,381
Total equity	3,708,207	3,792,821
Total liabilities and equity	7,540,008	7,831,151
Land
Property, buildings and equipment:
Land and buildings and improvements, gross value	663,569	662,885
Buildings and improvements
Property, buildings and equipment:
Land and buildings and improvements, gross value	4,016,435	4,004,824
Financing leases:
Financing leases - gross	59,528	60,513
Machinery and equipment
Property, buildings and equipment:
Land and buildings and improvements, gross value	1,188,608	1,177,572
Financing leases:
Financing leases - gross	115,302	109,416
Assets under construction
Property, buildings and equipment:
Land and buildings and improvements, gross value	$ 374,962	$ 303,531