Property, Plant and Equipment and Leasehold Intangibles, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 8,329,917		$ 8,329,917		$ 8,589,429
Accumulated depreciation and amortization	(3,901,679)		(3,901,679)		(4,053,727)
Property, plant and equipment and leasehold intangibles, net	4,428,238		4,428,238		4,535,702
Finance lease, right-of-use asset	31,000		31,000		98,400
Depreciation and amortization expense	84,400	$ 86,600	169,400	$ 172,300
Impairment charges	520	2,599	520	11,674
Nonrecurring
Property, Plant and Equipment [Line Items]
Non-cash impairment charges	500	$ 1,600	500	$ 2,100
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	504,178		504,178		506,968
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	5,329,627		5,329,627		5,323,736
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	1,085,929		1,085,929		1,055,304
Resident and leasehold operating intangibles
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	284,122		284,122		286,122
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	59,514		59,514		41,778
Assets under financing leases and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment and leasehold intangibles	$ 1,066,547		$ 1,066,547		$ 1,375,521