CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities
Net income (loss)	$ (189,070)	$ (238,340)	$ (99,364)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Loss (gain) on debt modification and extinguishment, net	2,702	1,357	1,932
Depreciation and amortization, net	350,408	353,890	344,910
Asset impairment	40,572	29,618	23,003
Equity in (earnings) loss of unconsolidated ventures	3,996	10,782	(10,394)
Distributions from unconsolidated ventures from cumulative share of net earnings	430	561	6,191
Amortization of entrance fees	(732)	(2,307)	(1,758)
Proceeds from deferred entrance fee revenue	477	4,222	3,562
Deferred income tax (benefit) provision	7,590	(1,324)	(9,837)
Operating lease expense adjustment	(45,739)	(34,896)	(23,280)
Change in fair value of derivatives	(1,144)	(7,659)	152
Loss (gain) on sale of assets, net	(37,737)	(74,445)	(288,835)
Loss (gain) on facility operating lease termination, net	0	0	(2,003)
Non-cash stock-based compensation expense	11,985	14,466	16,270
Property and casualty insurance income	(18,920)	(11,379)	(4,689)
Other non-operating (income) loss	(2,542)	0	0
Changes in operating assets and liabilities:
Accounts receivable, net	7,380	(4,624)	502
Prepaid expenses and other assets, net	21,629	(21,240)	(15,483)
Trade accounts payable and accrued expenses	2,448	(27,185)	(54,032)
Refundable fees and deferred revenue	(654)	(1,934)	(10,066)
Operating lease assets and liabilities for lessor capital expenditure reimbursements	9,844	13,718	30,965
Operating lease assets and liabilities for lease termination	0	0	(2,380)
Net cash provided by (used in) operating activities	162,923	3,281	(94,634)
Cash Flows from Investing Activities
Purchase of marketable securities	(174,476)	(263,669)	(362,257)
Sale and maturities of marketable securities	197,100	398,752	352,988
Capital expenditures, net of related payables	(233,205)	(196,924)	(176,657)
Acquisition of assets, net of cash acquired	(574)	(6,004)	0
Investment in unconsolidated ventures	(7,589)	(218)	(5,436)
Distributions received from unconsolidated ventures	0	966	37,113
Proceeds from sale of assets, net	83,526	4,653	334,006
Property and casualty insurance proceeds	24,704	0	0
Purchase of interest rate cap instruments	(12,454)	(1,632)	0
Proceeds from interest rate cap instruments	9,890	788	0
Other	(286)	(4,141)	1,700
Net cash provided by (used in) investing activities	(113,364)	(67,429)	181,457
Cash Flows from Financing Activities
Proceeds from debt	205,549	254,259	352,962
Repayment of debt and financing lease obligations	(367,242)	(281,185)	(441,571)
Proceeds from issuance of tangible equity units	0	139,438	0
Purchase of capped call transactions	0	0	(15,916)
Payment of financing costs, net of related payables	(10,831)	(7,077)	(3,904)
Payments of employee taxes for withheld shares	(1,915)	(4,293)	(4,820)
Other	0	(760)	(408)
Net cash provided by (used in) financing activities	(174,439)	100,382	(113,657)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(124,880)	36,234	(26,834)
Cash, cash equivalents, and restricted cash at beginning of period	474,548	438,314	465,148
Cash, cash equivalents, and restricted cash at end of period	$ 349,668	$ 474,548	$ 438,314