Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenues [Abstract]
Nonrefundable entrance fees	$ 581,530		$ 581,530		$ 562,026
Other deferred revenue	326,322		326,322		343,607
Deferred revenue	907,852		907,852		$ 905,633
Proceeds from nonrefundable entrance fees	34,000	$ 31,000	62,000	$ 60,000
Amortization of nonrefundable entrance fee	21,000	20,000	43,000	40,000
Amortization of other deferred charges	$ 13,000	$ 18,000	$ 27,000	$ 31,000