Property, Plant and Equipment and Leasehold Intangibles, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 8,396,788		$ 8,347,406
Accumulated depreciation and amortization	(4,102,863)		(4,016,777)
Property, plant and equipment and leasehold intangibles, net	4,293,925		4,330,629
Depreciation and amortization expense	86,100	$ 84,900
Nonrecurring
Property, Plant and Equipment [Line Items]
Non-cash impairment charges	1,700
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	500,649		500,649
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	5,362,393		5,348,133
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	1,125,892		1,111,408
Resident in-place lease intangibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	282,411		282,411
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	38,763		33,905
Assets under financing leases and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 1,086,680		$ 1,070,900