Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 19,003	$ (125,568)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	32,028	32,712
Asset impairments		1,308
Amortization of debt issuance costs and other non-cash interest	1,730	1,566
Gain on sale of real estate assets, net	(2,261)
Deferred income taxes	2,679	96,469
Non-cash revenue and other income	(1,753)	385
Non-cash equity compensation	5,267	4,213
Other expenses and non-cash items	1,343	2,403
Changes in assets and liabilities, net:
Accounts receivable, prepaid expenses and other assets	19,369	13,670
Accounts payable, accrued expenses and other liabilities	20,302	72,438
Net cash provided by operating activities	97,707	99,596
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for facility development and expansions	(2,916)	(4,001)
Expenditures for other capital improvements	(9,007)	(12,221)
Net proceeds from sale of assets	9,316	30
Increase in other assets	(1,205)	(1,167)
Net cash used in investing activities	(3,812)	(17,359)
CASH FLOWS FROM FINANCING ACTIVITIES:
Scheduled principal repayments	(7,903)	(9,945)
Principal repayments of credit facility		(20,000)
Payment of debt defeasance, issuance and other refinancing and related costs	(13)	(125)
Payment of lease obligations for financing leases	(142)	(136)
Contingent consideration for acquisition of business		(1,000)
Dividends paid	(866)	(1,611)
Purchase and retirement of common stock	(5,144)	(1,634)
Net cash used in financing activities	(14,068)	(34,451)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	79,827	47,786
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	310,707	136,768
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	390,534	184,554
NON-CASH INVESTING AND FINANCING ACTIVITIES
Establishment of right of use assets and lease liabilities	550	322
Cash paid during the period for:
Interest (net of amounts capitalized of $0.2 million and $0.0 million in 2022 and 2021, respectively)	4,668	9,251
Income taxes paid	$ 1	$ 69