Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (125,568)	$ 33,238
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	32,712	37,952
Asset impairments	1,308	536
Amortization of debt issuance costs and other non-cash interest	1,566	1,356
Deferred income taxes	96,469	2,395
Non-cash revenue and other income	385	(2,705)
Non-cash equity compensation	4,213	4,610
Other expenses and non-cash items	2,403	3,810
Changes in assets and liabilities, net:
Accounts receivable, prepaid expenses and other assets	13,670	7,648
Accounts payable, accrued expenses and other liabilities	72,438	(13,463)
Net cash provided by operating activities	99,596	75,377
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for facility development and expansions	(4,001)	(22,233)
Expenditures for other capital improvements	(12,221)	(8,618)
Acquisitions, net of cash acquired		(8,849)
Net proceeds from sale of assets	30	42
Increase in other assets	(1,167)	(2,411)
Net cash used in investing activities	(17,359)	(42,069)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of debt and borrowings from credit facility		374,000
Scheduled principal repayments	(9,945)	(7,553)
Principal repayments of credit facility	(20,000)	(108,000)
Payment of debt issuance and other refinancing and related costs	(125)	(285)
Payment of lease obligations for financing leases	(136)	(135)
Contingent consideration for acquisition of businesses	(1,000)
Dividends paid	(1,611)	(54,527)
Purchase and retirement of common stock	(1,634)	(3,560)
Net cash provided by (used in) financing activities	(34,451)	199,940
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	47,786	233,248
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	136,768	119,093
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	184,554	352,341
NON-CASH INVESTING AND FINANCING ACTIVITIES
Debt assumed on acquisition of property portfolio		52,217
Establishment of right of use assets and lease liabilities	322	62
Cash paid during the period for:
Interest (net of amounts capitalized of $0.0 million and $0.5 million in 2021 and 2020, respectively)	9,251	12,881
Income taxes paid (refunded), net	$ 69	$ (285)