CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (103,533)	$ (143,662)
Adjustments to net income (loss):
Depreciation and amortization	210,397	214,008
Deferred income tax expense (benefit)	13,949	14,361
Impairments and other charges	82
Amortization of debt discount and deferred financing costs	7,730	7,302
Losses (gains) on debt buyback	(2,667)
Losses (gains) on long-lived assets, net	3,633	2,257
Losses (gains) on investments, net	(7,688)	723
Provision (recovery) of bad debt	(419)	(3,400)
Share-based compensation	8,424	8,628
Foreign currency transaction losses (gains), net	8,548	2,522
Noncontrolling interest	(14,176)	(540)
Other	212	166
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	14,914	(34,381)
Inventory	(685)	(7,835)
Other current assets	13,458	22,600
Other long-term assets	(23,907)	6,011
Trade accounts payable and accrued liabilities	(95,669)	(143,050)
Income taxes payable	6,107	836
Other long-term liabilities	31,144	(28,229)
Net cash (used for) provided by operating activities	69,854	(81,683)
Cash flows from investing activities:
Purchases of investments	(4,221)	(676)
Sales and maturities of investments	1,134	1,148
Cash paid for acquisition of businesses, net of cash acquired	(2,929)
Capital expenditures	(141,070)	(94,026)
Proceeds from sales of assets and insurance claims	2,642	3,076
Net cash (used for) provided by investing activities	(144,444)	(90,478)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		800,000
Debt issuance costs	(35)	(12,928)
Proceeds from revolving credit facilities	180,000	615,000
Reduction in revolving credit facilities	(50,000)	(680,000)
Reduction in long-term debt	(43,540)	(460,837)
Dividends to common and preferred shareholders	(25,765)	(17,148)
Proceeds from (payment for) commercial paper		(40,000)
Proceeds from (payments for) short-term borrowings	289	194
Other	(1,493)	(2,245)
Net cash provided by financing activities	59,456	202,036
Effect of exchange rate changes on cash and cash equivalents	(2,791)	(867)
Net increase (decrease) in cash and cash equivalents and restricted cash	(17,925)	29,008
Cash and cash equivalents and restricted cash, beginning of period	451,080	342,029
Cash and cash equivalents and restricted cash, end of period	433,155	371,037
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	429,127	367,039
Restricted cash, end of period	4,028	3,998
Cash and cash equivalents and restricted cash, end of period	$ 433,155	$ 371,037