CONDENSED 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)	$ (128,310)	$ (374,362)
Adjustments to net income (loss):
Depreciation and amortization	177,277	227,063
Deferred income tax expense (benefit)	(1,178)	24,903
Impairments and other charges	355	265,779
Amortization of debt discount and deferred financing costs	5,400	8,153
Losses (gains) on debt buyback	(8,062)	(15,742)
Losses (gains) on long-lived assets, net	8,524	1,391
Losses (gains) on investments, net	(315)	5,539
Provision (recovery) of bad debt	(2,339)	10,417
Share-based compensation	6,775	9,158
Foreign currency transaction losses (gains), net	2,365	(559)
Noncontrolling interest	(8,777)	(17,465)
Other	398	188
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	32,017	(16,008)
Inventory	6,039	(1,421)
Other current assets	(6,476)	12,292
Other long-term assets	(4,949)	2,046
Trade accounts payable and accrued liabilities	(17,697)	(76,952)
Income taxes payable	15,766	4,475
Other long-term liabilities	2,677	(9,733)
Net cash provided by (used for) operating activities	79,490	59,162
Cash flows from investing activities:
Purchases of investments	(14)
Sales and maturities of investments	10,908	1,835
Capital expenditures	(40,852)	(59,430)
Proceeds from sales of assets and insurance claims	10,839	6,822
Net cash (used for) provided by investing activities	(19,119)	(50,773)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		1,000,000
Reduction in long-term debt	(16,838)	(1,068,405)
Debt issuance costs	(2,421)	(15,737)
Proceeds from revolving credit facilities	95,000	795,000
Reduction in revolving credit facilities	(135,000)	(650,000)
Repurchase of common and preferred shares		(13,858)
Dividends to common and preferred shareholders	(3,662)	(7,937)
Distributions to noncontrolling interest	(49,077)
Other	(1,923)	(1,491)
Net cash (used for) provided by financing activities	(113,921)	37,572
Effect of exchange rate changes on cash and cash equivalents	(1,111)	(2,219)
Net increase (decrease) in cash and cash equivalents and restricted cash	(54,661)	43,742
Cash and cash equivalents and restricted cash, beginning of period	475,280	442,038
Cash and cash equivalents and restricted cash, end of period	420,619	485,780
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	417,544	480,522
Restricted cash, end of period	3,075	5,258
Cash and cash equivalents and restricted cash, end of period	$ 420,619	$ 485,780