Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Net loss	$ (73,177)	$ (104,122)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	48,466	38,686
Write-off of deferred loan costs	0	1,244
Amortization of deferred loan costs and debt discount	5,208	1,434
Provision for doubtful accounts	9,432	6,157
Foreign currency loss	1,457	596
Deferred income taxes	(8,273)	(22,107)
Gain on revaluation of contingent consideration	(202)	(1,174)
Gain on asset disposal	(900)	(826)
Loss (gain) on convertible debt embedded derivative	24,783	(6,292)
Goodwill impairment loss	0	75,241
Non-cash compensation cost	9,414	5,846
Other, net	(2,911)	(3,052)
(Increase) decrease:
Receivables	(11,409)	(18,844)
Inventory	(2,632)	(1,459)
Prepaid expenses and other current assets	1,544	3,302
Increase (decrease):
Accounts payable	(6,560)	(5,636)
Other accrued liabilities	10,058	21,207
Income taxes	1,004	(366)
Net cash provided by (used) in operating activities	5,302	(10,165)
Cash flows from investing activities:
Capital expenditures	(19,394)	(26,541)
Proceeds from disposal of assets	1,464	2,559
Other	(462)	(519)
Net cash used in investing activities	(18,392)	(24,501)
Cash flows from financing activities:
Net borrowings (payments) under revolving credit agreement	6,370	(37,386)
Payments under term loan	0	(170,000)
Issuance of convertible debt, net of issuance costs	0	222,311
Contingent consideration payments	(1,106)	(1,278)
Debt issuance costs on Credit Facility	(855)	(1,038)
Issuance of common stock from share-based payment arrangements	0	449
Payments related to withholding tax for share-based payment arrangements	(269)	(325)
Net cash provided by financing activities	4,140	12,733
Effect of exchange rate changes on cash	(1,647)	2,398
Net decrease in cash or cash equivalents	(10,597)	(19,535)
Cash and cash equivalents at beginning of period	26,552	46,216
Cash and cash equivalents at end of period	$ 15,955	$ 26,681