Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Net loss	$ (104,122)	$ (3,299)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	38,686	35,432
Write-off of deferred loan costs	1,244	0
Amortization of deferred loan costs and debt discount	1,434	381
Provision for doubtful accounts	6,157	3,242
Foreign currency loss (gain)	596	(197)
Deferred income taxes	(22,107)	(3,552)
(Gain) loss on revaluation of contingent consideration	(1,174)	2,184
(Gain) loss on asset disposal	(826)	10
Gain on convertible debt embedded derivative	(6,292)	0
Goodwill impairment loss	75,241	0
Non-cash compensation cost	5,846	6,672
Other, net	(3,052)	(862)
(Increase) decrease, net of the effect of acquisitions:
Receivables	(18,844)	16,537
Inventory	(1,459)	1,196
Prepaid expenses and other current assets	3,302	(6,264)
Increase (decrease), net of the effect of acquisitions:
Accounts payable	(5,636)	11,091
Other accrued liabilities	21,207	2,333
Income taxes	(366)	(4,259)
Net cash (used in) provided by operating activities	(10,165)	60,645
Cash flows used in investing activities:
Capital expenditures	(26,541)	(35,865)
Business acquisitions, net of cash acquired	0	(48,382)
Change in restricted cash	0	5,000
Proceeds from sale of assets	2,559	3,717
Other	(519)	666
Net cash used in investing activities	(24,501)	(74,864)
Cash flows from financing activities:
Net borrowings (payments) on Credit Facility	(37,386)	31,043
Payments under term loan	(170,000)	(15,000)
Issuance of convertible debt, net of issuance costs	222,311	0
Deferred consideration payments	0	(694)
Contingent consideration payments	(1,278)	(1,816)
Purchase of treasury stock	0	(7,593)
Debt issuance costs on Credit Facility	(1,038)	(759)
Corporate tax effect from share-based payment arrangements	0	108
Issuance of common stock from share-based payment arrangements	449	2,408
Payments related to withholding tax for share-based payment arrangements	(325)	(345)
Net cash provided by financing activities	12,733	7,352
Effect of exchange rate changes on cash	2,398	243
Net decrease in cash and cash equivalents	(19,535)	(6,624)
Cash and cash equivalents at beginning of period	46,216	44,825
Cash and cash equivalents at end of period	$ 26,681	$ 38,201