Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenues [Abstract]
Nonrefundable entrance fees	$ 592,576		$ 592,576		$ 562,026
Other deferred revenue	310,795		310,795		343,607
Deferred revenue	903,371		903,371		$ 905,633
Proceeds from nonrefundable entrance fees	34,000	$ 36,000	96,000	$ 96,000
Amortization of nonrefundable entrance fee	23,000	21,000	66,000	61,000
Amortization of other deferred charges	$ 13,000	$ 19,000	$ 40,000	$ 50,000