Accounts Payable, Accrued Liabilities, and Other Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Refundable entrance fees	$ 254,986	$ 268,972
Accrued construction costs	116,931	178,626
Accrued interest	46,256	59,291
Other accounts payable and accrued liabilities	269,477	265,596
Accounts payable, accrued liabilities, and other liabilities	687,650	772,485
Severance-related charges	$ 9,000	$ 15,000