Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, buildings and equipment:
Property, buildings and equipment - gross	$ 6,848,931	$ 6,762,810
Accumulated depreciation	(1,708,031)	(1,634,909)
Property, buildings and equipment – net	5,140,900	5,127,901
Operating lease right-of-use assets	369,706	377,536
Accumulated depreciation – operating leases	(61,359)	(57,483)
Operating leases – net	308,347	320,053
Financing leases:
Financing leases - gross	155,000	159,893
Accumulated depreciation – financing leases	(56,471)	(58,165)
Financing leases – net	98,529	101,728
Cash, cash equivalents and restricted cash	50,965	82,958
Accounts receivable – net of allowance of $20,725 and $18,755 at March 31, 2022 and December 31, 2021, respectively	419,348	380,014
Identifiable intangible assets – net	968,099	980,966
Goodwill	1,068,479	1,072,980
Investments in partially owned entities	43,526	37,458
Other assets	109,676	112,139
Total assets	8,207,869	8,216,197
Liabilities:
Borrowings under revolving line of credit	513,824	399,314
Accounts payable and accrued expenses	535,617	559,412
Mortgage notes, senior unsecured notes and term loans – net of unamortized deferred financing costs of $10,492 and $11,050, in the aggregate, at March 31, 2022 and December 31, 2021, respectively	2,422,570	2,443,806
Sale-leaseback financing obligations	177,305	178,817
Financing lease obligations	91,436	97,633
Operating lease obligations	291,050	301,765
Unearned revenue	28,349	26,143
Pension and postretirement benefits	3,057	2,843
Deferred tax liability – net	165,331	169,209
Multi-employer pension plan withdrawal liability	8,091	8,179
Total liabilities	4,236,630	4,187,121
Commitments and Contingencies
Shareholders’ equity:
Common shares of beneficial interest, $0.01 par value – 500,000,000 authorized shares; 268,672,465 and 268,282,592 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	2,687	2,683
Paid-in capital	5,177,642	5,171,690
Accumulated deficit and distributions in excess of net earnings	(1,234,875)	(1,157,888)
Accumulated other comprehensive income	15,926	4,522
Total shareholders’ equity	3,961,380	4,021,007
Noncontrolling interests:
Noncontrolling interests in operating partnership	9,859	8,069
Total unrealized gains on derivative contracts	3,971,239	4,029,076
Total liabilities and equity	8,207,869	8,216,197
Land
Property, buildings and equipment:
Property, buildings and equipment - gross	811,442	807,495
Buildings and improvements
Property, buildings and equipment:
Property, buildings and equipment - gross	4,163,054	4,152,763
Financing leases:
Financing leases - gross	13,557	13,552
Machinery and equipment
Property, buildings and equipment:
Property, buildings and equipment - gross	1,361,741	1,352,399
Financing leases:
Financing leases - gross	141,443	146,341
Assets under construction
Property, buildings and equipment:
Property, buildings and equipment - gross	$ 512,694	$ 450,153