CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (279,047)	$ (585,119)
Adjustments to net income (loss):
Depreciation and amortization	413,072	436,164
Deferred income tax expense (benefit)	(83,294)	(124,721)
Impairments and other charges		26,246
Deferred financing costs amortization	3,516	2,241
Discount amortization on long-term debt	9,787	1,111
Losses (gains) on debt buyback	15,944	(6,027)
Losses (gains) on long-lived assets, net	124	7,735
Losses (gains) on investments, net	1,342
Impairments on equity method holdings		216,242
Share-based compensation	18,045	16,596
Foreign currency transaction losses (gains), net	2,491	7,018
Equity in (earnings) losses of unconsolidated affiliates, net of dividends	(2)	221,920
Other	(2,636)	2,822
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(88,964)	255,945
Inventory	(4,125)	5,222
Other current assets	(8,137)	(6,609)
Other long-term assets	29,569	33,234
Trade accounts payable and accrued liabilities	75,961	(103,864)
Income taxes payable	12,718	(27,387)
Other long-term liabilities	(125,894)	(42,097)
Net cash (used for) provided by operating activities	(9,530)	336,672
Cash flows from investing activities:
Purchases of investments	(4,489)
Sales and maturities of investments	12,429	367
Capital expenditures	(315,769)	(193,234)
Proceeds from sales of assets and insurance claims	18,796	13,834
Other	(384)	38
Net cash (used for) provided by investing activities	(289,417)	(178,995)
Cash flows from financing activities:
Increase (decrease) in cash overdrafts	(42)	294
Proceeds from Issuance of Long-term Debt	411,200
Debt issuance costs	(11,037)
Proceeds from revolving credit facilities	100,000	260,000
Reduction in revolving credit facilities		(260,000)
Proceeds from (payments for) issuance of common shares	8,300	39
Repurchase of common shares		(1,687)
Distributions to Non-controlling interest	6,982
Non-controlling interest contribution	20,000
Reduction in long term debt	(377,983)	(148,045)
Dividends to shareholders	(34,197)	(16,922)
Proceeds from (payment for) commercial paper, net	171,985	(1,500)
Cash proceeds from equity component of exchangeable debt	159,952
Payments on term loan	(162,500)
Proceeds from (payments for) short-term borrowings	(173)	(6,333)
Purchase of capped call hedge transactions	40,250
Other	(7,844)	(4,280)
Net cash (used for) provided by financing activities	230,429	(178,434)
Payments for hedge transactions	(40,250)
Effect of exchange rate changes on cash and cash equivalents	992	(21)
Net increase (decrease) in cash and cash equivalents	(67,526)	(20,778)
Cash and cash equivalents, beginning of period	264,093	254,530
Cash and cash equivalents, end of period	$ 196,567	$ 233,752