CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ (395,999)	$ (447,104)
Adjustments to net income (loss):
Depreciation and amortization	650,280	641,841
Deferred income tax expense (benefit)	14,565	36,164
Impairments and other charges	98,869	16,530
Amortization of debt discount and deferred financing costs	23,197	22,311
Losses (gains) on debt buyback	1,752	10,476
Losses (gains) on long-lived assets, net	8,410	74,388
Losses (gains) on investments, net	(2,400)	7,198
Provision (recovery) of bad debt	379	(2,568)
Share-based compensation	19,489	20,371
Foreign currency transaction losses (gains), net	18,681	7,870
Noncontrolling interest	(44,202)	(10,427)
Other	511	561
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	136,266	(82,195)
Inventory	(21,500)	(1,478)
Other current assets	18,085	21,724
Other long-term assets	(37,977)	12,883
Trade accounts payable and accrued liabilities	(129,375)	(160,018)
Income taxes payable	3,459	(23,717)
Other long-term liabilities	68,338	(67,891)
Net cash provided by (used for) operating activities	430,828	76,919
Cash flows from investing activities:
Purchases of investments	(5,008)	(676)
Sales and maturities of investments	14,466	2,962
Cash paid for acquisition of businesses, net of cash acquired	(2,929)
Capital expenditures	(366,594)	(338,968)
Proceeds from sales of assets and insurance claims	26,365	86,666
Net cash (used for) provided by investing activities	(333,700)	(250,016)
Cash flows from financing activities:
Increase (decrease) in cash overdrafts	(130)	(261)
Proceeds from issuance of long-term debt		800,000
Debt issuance costs	(48)	(13,262)
Proceeds from revolving credit facilities	975,000	905,000
Reduction in revolving credit facilities	(690,000)	(1,200,000)
Proceeds from issuance of common shares, net of issuance costs		301,835
Proceeds from issuance of preferred stock, net of issuance costs		278,358
Distributions to noncontrolling interest	(4,552)	(4,676)
Reduction in long-term debt	(379,193)	(774,802)
Dividends to common and preferred shareholders	(41,643)	(61,341)
Proceeds from (payment for) commercial paper		(40,000)
Repurchase of preferred shares	79
Proceeds from (payments for) short-term borrowings	497	252
Other	(1,611)	(3,722)
Net cash (used for) provided by financing activities	(141,759)	187,381
Effect of exchange rate changes on cash and cash equivalents	(4,421)	(5,320)
Net increase (decrease) in cash and cash equivalents and restricted cash	(49,052)	8,964
Cash and cash equivalents and restricted cash, beginning of period	451,080	342,029
Cash and cash equivalents and restricted cash, end of period	402,028	350,993
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents, beginning of period	447,766	336,997
Restricted cash, beginning of period	3,314	5,032
Cash and cash equivalents and restricted cash, beginning of period	451,080	342,029
Cash and cash equivalents, end of period	396,937	347,525
Restricted cash, end of period	5,091	3,468
Cash and cash equivalents and restricted cash, end of period	$ 402,028	$ 350,993