Accounts Payable, Accrued Liabilities, and Other Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Refundable entrance fees	$ 248,158	$ 251,874
Accrued construction costs	108,797	105,572
Accrued interest	56,411	59,492
Other accounts payable and accrued liabilities	303,825	240,258
Accounts payable, accrued liabilities, and other liabilities	717,191	657,196
Severance-related charges	$ 7,000	$ 8,000