Deferred Revenue - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenues [Abstract]
Nonrefundable entrance fees	$ 553,114		$ 553,114		$ 518,573
Other deferred revenue	326,060		326,060		325,503
Deferred revenue	879,174		879,174		$ 844,076
Proceeds from nonrefundable entrance fees	36,000	$ 24,000	96,000	$ 74,000
Amortization of nonrefundable entrance fee	21,000	20,000	61,000	58,000
Amortization of other deferred charges	$ 19,000	$ 12,000	$ 50,000	$ 32,000