CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income (loss)	$ 152,337	$ (360,225)	$ 97,781
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Goodwill impairment	0	379,863	0
Depreciation	74,879	58,818	43,724
Amortization of intangible assets	32,155	6,226	3,543
Share-based compensation expense	11,833	19,143	22,782
Change in debt discounts and deferred debt issuance costs	20,153	13,207	12,072
Deferred income taxes	48,253	(71,609)	(449)
Gain on remeasurement of investment in joint venture	0	(37,792)	0
(Gain) loss on sale of property and equipment	(1,673)	(4,688)	402
Changes in other components of working capital, net of balances acquired	(169,976)	131,257	(156,844)
Other long-term liabilities	4,352	1,863	(2,007)
Other, net	459	467	398
NET CASH PROVIDED BY OPERATING ACTIVITIES	172,772	136,530	21,402
Cash Flows from Investing Activities:
Business acquisition, cash balance acquired net of cash paid	0	6,607	0
Acquisition of property and equipment	(54,781)	(84,196)	(77,069)
Proceeds from sale of property and equipment	14,550	12,581	6,387
Investments in securities	(31,331)	(35,167)	(20,848)
Proceeds from maturities and sales of investments in securities	25,204	24,120	21,322
NET CASH USED IN INVESTING ACTIVITIES	(46,358)	(76,055)	(70,208)
Cash Flows from Financing Activities:
Proceeds from debt	1,301,282	931,594	1,753,160
Repayment of debt	(1,119,887)	(870,277)	(1,738,314)
Business acquisition related payment	0	0	(15,951)
Cash payments related to share-based compensation	(1,397)	(2,363)	(2,671)
Distributions paid to noncontrolling interests	(48,467)	(46,500)	(29,000)
Contributions from noncontrolling interests	3,000	9,813	3,797
Debt issuance, extinguishment and modification costs	(11,194)	(504)	0
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	123,337	21,763	(28,979)
Net increase (decrease) in cash, cash equivalents and restricted cash	249,751	82,238	(77,785)
Cash, cash equivalents and restricted cash at beginning of year	202,101	119,863	197,648
Cash, cash equivalents and restricted cash at end of year	$ 451,852	$ 202,101	$ 119,863