Property, Plant and Equipment and Leasehold Intangibles, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 8,772,241		$ 8,718,743
Accumulated depreciation and amortization	(3,898,197)		(3,814,451)
Property, plant and equipment and leasehold intangibles, net	4,874,044		4,904,292
Finance lease, right-of-use asset	335,600		332,300
Depreciation and amortization expense	85,700	$ 83,900
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	502,610		502,610
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	5,274,249		5,262,136
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	1,002,550		990,006
Resident and leasehold operating intangibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	302,995		303,737
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	53,099		51,037
Assets under financing leases and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 1,636,738		$ 1,609,217