CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (658,967)	$ (395,999)
Adjustments to net income (loss):
Depreciation and amortization	645,045	650,280
Deferred income tax expense (benefit)	24,535	14,565
Impairments and other charges	301,619	98,869
Amortization of debt discount and deferred financing costs	24,347	23,197
Losses (gains) on debt buyback	(65,848)	1,752
Losses (gains) on long-lived assets, net	5,754	8,410
Losses (gains) on investments, net	5,653	(2,400)
Provision (recovery) of bad debt	9,729	379
Share-based compensation	20,170	19,489
Foreign currency transaction losses (gains), net	11,404	18,681
Noncontrolling interest	(38,437)	(44,202)
Other	257	511
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	90,757	136,266
Inventory	11,111	(21,500)
Other current assets	12,510	18,085
Other long-term assets	22,907	(37,977)
Trade accounts payable and accrued liabilities	(159,621)	(129,375)
Income taxes payable	2,393	3,459
Other long-term liabilities	(17,412)	68,338
Net cash provided by (used for) operating activities	247,906	430,828
Cash flows from investing activities:
Purchases of investments	(30)	(5,008)
Sales and maturities of investments	2,043	14,466
Cash paid for acquisition of businesses, net of cash acquired		(2,929)
Capital expenditures	(153,128)	(366,594)
Proceeds from sales of assets and insurance claims	21,773	26,365
Net cash (used for) provided by investing activities	(129,342)	(333,700)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	1,000,000
Reduction in long-term debt	(1,390,236)	(379,193)
Debt issuance costs	(19,149)	(48)
Proceeds from revolving credit facilities	1,522,265	975,000
Reduction in revolving credit facilities	(1,125,000)	(690,000)
Proceeds from (payments for) short-term borrowings		497
Repurchase of common and preferred shares	(13,858)	(79)
Dividends to common and preferred shareholders	(18,885)	(41,643)
Distributions to noncontrolling interest	(2,033)	(4,552)
Other	(1,576)	(1,741)
Net cash (used for) provided by financing activities	(48,472)	(141,759)
Effect of exchange rate changes on cash and cash equivalents	(3,987)	(4,421)
Net increase (decrease) in cash and cash equivalents and restricted cash	66,105	(49,052)
Cash and cash equivalents and restricted cash, beginning of period	442,038	451,080
Cash and cash equivalents and restricted cash, end of period	508,143	402,028
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents, beginning of period	435,990	447,766
Restricted cash, beginning of period	6,048	3,314
Cash and cash equivalents and restricted cash, beginning of period	442,038	451,080
Cash and cash equivalents, end of period	504,985	396,937
Restricted cash, end of period	3,158	5,091
Cash and cash equivalents and restricted cash, end of period	$ 508,143	$ 402,028