CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ (434,427)	$ (658,967)
Adjustments to net income (loss):
Depreciation and amortization	525,427	645,045
Deferred income tax expense (benefit)	(9,305)	24,535
Impairments and other charges	72,898	301,619
Amortization of debt discount and deferred financing costs	15,846	24,347
Losses (gains) on debt buyback	(10,706)	(65,848)
Losses (gains) on long-lived assets, net	17,299	5,754
Losses (gains) on investments, net	(767)	5,653
Provision (recovery) of bad debt	(350)	9,729
Share-based compensation	15,207	20,170
Foreign currency transaction losses (gains), net	3,391	11,404
Noncontrolling interest	(21,168)	(38,437)
Other	737	257
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	74,873	90,757
Inventory	21,137	11,111
Other current assets	(6,060)	12,510
Other long-term assets	3,721	22,907
Trade accounts payable and accrued liabilities	8,485	(159,621)
Income taxes payable	12,622	2,393
Other long-term liabilities	37,623	(17,412)
Net cash provided by (used for) operating activities	326,483	247,906
Cash flows from investing activities:
Purchases of investments	(14,041)	(30)
Sales and maturities of investments	11,371	2,043
Purchase of intangible assets	(3,600)
Capital expenditures	(179,902)	(153,128)
Proceeds from sales of assets and insurance claims	121,678	21,773
Other	(594)
Net cash (used for) provided by investing activities	(65,088)	(129,342)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		1,000,000
Reduction in long-term debt	(151,508)	(1,390,236)
Debt issuance costs	(2,421)	(19,149)
Proceeds from revolving credit facilities	565,000	1,522,265
Reduction in revolving credit facilities	(312,500)	(1,125,000)
Repurchase of common and preferred shares		(13,858)
Dividends to common and preferred shareholders	(7,380)	(18,885)
Redeemable noncontrolling interest distribution	(49,077)
Distributions to noncontrolling interest	(1,790)	(2,033)
Other	(2,496)	(1,576)
Net cash (used for) provided by financing activities	37,828	(48,472)
Effect of exchange rate changes on cash and cash equivalents	(720)	(3,987)
Net increase (decrease) in cash and cash equivalents and restricted cash	298,503	66,105
Cash and cash equivalents and restricted cash, beginning of period	475,280	442,038
Cash and cash equivalents and restricted cash, end of period	773,783	508,143
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents, beginning of period	472,246	435,990
Restricted cash, beginning of period	3,034	6,048
Cash and cash equivalents and restricted cash, beginning of period	475,280	442,038
Cash and cash equivalents, end of period	771,878	504,985
Restricted cash, end of period	1,905	3,158
Cash and cash equivalents and restricted cash, end of period	$ 773,783	$ 508,143