Property, Plant and Equipment and Leasehold Intangibles, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 8,864,483		$ 8,864,483		$ 8,718,743
Accumulated depreciation and amortization	(4,062,495)		(4,062,495)		(3,814,451)
Property, plant and equipment and leasehold intangibles, net	4,801,988		4,801,988		4,904,292
Finance lease, right-of-use asset	307,800		307,800		332,300
Depreciation and amortization expense	86,900	$ 84,600	259,200	$ 252,000
Nonrecurring
Property, Plant and Equipment [Line Items]
Non-cash impairment charges	3,800	$ 600	5,900	$ 2,900
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	508,110		508,110		502,610
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	5,311,077		5,311,077		5,262,136
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	1,036,181		1,036,181		990,006
Resident and leasehold operating intangibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	301,732		301,732		303,737
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	51,665		51,665		51,037
Assets under financing leases and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 1,655,718		$ 1,655,718		$ 1,609,217