CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net income (loss)	$ 251,077	$ (98,661)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Loss (gain) on debt modification and extinguishment, net	(19,024)	2,739
Depreciation and amortization, net	186,763	192,877
Asset impairment	88,516	4,160
Equity in (earnings) loss of unconsolidated ventures	570	1,517
Distributions from unconsolidated ventures from cumulative share of net earnings	0	1,530
Amortization of entrance fees	(925)	(772)
Proceeds from deferred entrance fee revenue	85	1,739
Deferred income tax (benefit) provision	(15,253)	470
Operating lease expense adjustment	(14,954)	(8,812)
Loss (gain) on sale of assets, net	(371,810)	(2,144)
Loss (gain) on facility lease termination and modification, net	0	2,006
Non-cash stock-based compensation expense	12,076	12,386
Non-cash management contract termination gain	0	(640)
Other	(1,800)	(4,401)
Changes in operating assets and liabilities:
Accounts receivable, net	12,995	(3,997)
Prepaid expenses and other assets, net	20,162	30,823
Prepaid insurance premiums financed with notes payable	(11,664)	(12,090)
Trade accounts payable and accrued expenses	(18,692)	(43,385)
Refundable fees and deferred revenue	80,688	(17,226)
Operating lease assets and liabilities for lessor capital expenditure reimbursements	10,509	1,000
Net cash provided by (used in) operating activities	209,319	59,119
Cash Flows from Investing Activities
Change in lease security deposits and lease acquisition deposits, net	3,304	(83)
Purchase of marketable securities	(149,236)	(98,059)
Sale and maturities of marketable securities	108,750	55,000
Capital expenditures, net of related payables	(112,863)	(122,297)
Acquisition of assets, net of related payables and cash received	446,688	0
Investment in unconsolidated ventures	(356)	(4,204)
Distributions received from unconsolidated ventures	0	5,305
Proceeds from sale of assets, net	300,539	52,430
Proceeds from notes receivable	1,140	31,609
Net cash provided by (used in) investing activities	(295,410)	(80,299)
Cash Flows from Financing Activities
Proceeds from debt	473,460	158,231
Repayment of debt and financing lease obligations	(303,920)	(238,036)
Proceeds from line of credit	166,381	0
Purchase of treasury stock, net of related payables	(18,123)	(18,401)
Payment of financing costs, net of related payables	(7,469)	(3,342)
Payments of employee taxes for withheld shares	(3,951)	(3,105)
Other	146	574
Net cash provided by (used in) financing activities	306,524	(104,079)
Net increase (decrease) in cash, cash equivalents, and restricted cash	220,433	(125,259)
Cash, cash equivalents, and restricted cash at beginning of period	301,697	450,218
Cash, cash equivalents, and restricted cash at end of period	$ 522,130	$ 324,959