CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (425,466)	$ (695,145)
Adjustments to net income (loss):
Depreciation and amortization	630,773	657,541
Deferred income tax expense (benefit)	(114,973)	(168,413)
Impairments and other charges	35,293	45,809
Deferred financing costs amortization	5,300	3,335
Discount amortization on long-term debt	15,129	1,597
Losses (gains) on debt buyback	16,005	(6,707)
Losses (gains) on long-lived assets, net	10,180	13,608
Losses (gains) on investments, net	1,342
Impairments on equity method holdings		216,242
Share-based compensation	25,057	24,070
Foreign currency transaction losses (gains), net	1,728	5,916
Equity in (earnings) losses of unconsolidated affiliates, net of dividends	(6)	221,918
Other	(4,596)	2,025
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(128,542)	255,455
Inventory	(14,567)	14,660
Other current assets	(6,967)	30,192
Other long-term assets	35,378	(377)
Trade accounts payable and accrued liabilities	21,611	(187,771)
Income taxes payable	19,790	(22,496)
Other long-term liabilities	(158,578)	(6,691)
Net cash (used for) provided by operating activities	(36,109)	404,768
Cash flows from investing activities:
Purchases of investments	(6,722)	(24)
Sales and maturities of investments	12,533	643
Cash paid for acquisition of businesses, net	(50,764)
Capital expenditures	(448,864)	(284,950)
Proceeds from sales of assets and insurance claims	32,805	26,597
Other	(427)	(19)
Net cash (used for) provided by investing activities	(461,439)	(257,753)
Cash flows from financing activities:
Increase (decrease) in cash overdrafts	(78)	5
Proceeds from Issuance of Long-term Debt	411,200
Debt issuance costs	(11,039)
Proceeds from revolving credit facilities	410,000	560,000
Reduction in revolving credit facilities		(260,000)
Proceeds from (payments for) issuance of common shares	8,300	562
Repurchase of common shares		(1,687)
Distributions to noncontrolling interest	7,272
Noncontrolling interest contribution	20,000
Reduction in long term debt	(382,815)	(492,625)
Dividends to shareholders	(51,346)	(33,927)
Proceeds from (payment for) commercial paper, net	78,000	15,000
Cash proceeds from equity component of exchangeable debt	159,952
Payments on term loan	(162,500)
Proceeds from (payments for) short-term borrowings	(528)	(6,388)
Purchase of capped call hedge transactions	40,250
Other	(7,864)	(4,313)
Net cash (used for) provided by financing activities	423,760	(223,373)
Effect of exchange rate changes on cash and cash equivalents	251	(1,129)
Net increase (decrease) in cash and cash equivalents	(73,537)	(77,487)
Cash and cash equivalents, beginning of period	264,093	254,530
Cash and cash equivalents, end of period	$ 190,556	$ 177,043