CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income (loss)	$ 369,497	$ (42,606)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Loss (gain) on debt modification and extinguishment, net	(19,181)	67
Depreciation and amortization, net	92,053	97,867
Asset impairment	78,226	391
Equity in (earnings) loss of unconsolidated ventures	1,008	526
Distributions from unconsolidated ventures from cumulative share of net earnings	0	749
Amortization of entrance fees	(377)	(398)
Proceeds from deferred entrance fee revenue	343	436
Deferred income tax (benefit) provision	(21,767)	170
Operating lease expense adjustment	(6,733)	(4,383)
Loss (gain) on sale of assets, net	(372,839)	702
Loss (gain) on facility lease termination and modification, net	0	209
Non-cash stock-based compensation expense	5,957	6,356
Non-cash management contract termination gain	0	(353)
Other	(1,460)	(2,495)
Changes in operating assets and liabilities:
Accounts receivable, net	(2,033)	(4,550)
Prepaid expenses and other assets, net	(1,696)	12,358
Prepaid insurance premiums financed with notes payable	(17,434)	(18,842)
Trade accounts payable and accrued expenses	(47,919)	(41,358)
Refundable fees and deferred revenue	(2,254)	(9,855)
Operating lease assets and liabilities for lessor capital expenditure reimbursements	4,088	0
Net cash provided by (used in) operating activities	57,479	(5,009)
Cash Flows from Investing Activities
Change in lease security deposits and lease acquisition deposits, net	3,211	(320)
Purchase of marketable securities	(89,414)	(68,348)
Sale and maturities of marketable securities	50,000	0
Capital expenditures, net of related payables	(69,385)	(60,055)
Acquisition of assets, net of related payables and cash received	446,688	0
Investment in unconsolidated ventures	(268)	(3,986)
Distributions received from unconsolidated ventures	0	3,178
Proceeds from sale of assets, net	304,617	29,458
Net cash provided by (used in) investing activities	(247,927)	(100,073)
Cash Flows from Financing Activities
Proceeds from debt	471,785	25,178
Repayment of debt and financing lease obligations	(263,226)	(28,400)
Proceeds from line of credit	166,381	0
Purchase of treasury stock, net of related payables	(18,123)	(9,956)
Payment of financing costs, net of related payables	(5,815)	(759)
Payments of employee taxes for withheld shares	(3,898)	(2,997)
Other	146	298
Net cash provided by (used in) financing activities	347,250	(16,636)
Net increase (decrease) in cash, cash equivalents, and restricted cash	156,802	(121,718)
Cash, cash equivalents, and restricted cash at beginning of period	301,697	450,218
Cash, cash equivalents, and restricted cash at end of period	$ 458,499	$ 328,500