Property, Plant and Equipment and Leasehold Intangibles, Net - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 8,347,406	$ 8,589,429
Accumulated depreciation and amortization	(4,016,777)	(4,053,727)
Property, plant and equipment and leasehold intangibles, net	4,330,629	4,535,702
Depreciation and amortization expense for plant and equipment and leasehold intangibles	342,700	347,400	$ 337,600
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	500,649	506,968
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	5,348,133	5,323,736
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	1,111,408	1,055,304
Resident in-place lease intangibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	282,411	286,122
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	33,905	41,778
Assets under financing leases and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 1,070,900	$ 1,375,521