Consolidated Statements of Cash Flows - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	May 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 8,878	$ (104,161)	$ (12,676)	$ 40,497
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	19,426	52,143	48,673	22,787
Write-off of deferred loan costs	0	1,244	0	0
Loss on asset impairment and disposals	51	553	1,540	617
Amortization of deferred loan costs and debt discount	256	3,085	541	223
Provision for doubtful accounts	1,819	7,097	6,336	233
Loss on investment in Venezuela	0	0	0	1,177
Foreign currency (gain) loss	813	499	(93)	1,509
Deferred income taxes	2,411	(46,540)	(4,236)	(729)
(Gain) loss on revaluation of contingent consideration	522	(1,174)	2,184	0
Gain on convertible debt embedded derivative	0	(818)	0	0
Goodwill impairment loss	0	75,241	0	0
Non-cash compensation cost	3,469	7,876	7,313	4,838
Other, net	0	(3,789)	(1,182)	0
(Increase) decrease, net of the effects of acquisitions:
Receivables	15,231	(39,820)	16,518	(43,425)
Inventory	372	614	2,119	(925)
Prepaid expenses and other current assets	(111)	6,642	(163)	(2,525)
Increase (decrease), net of the effects of acquisitions:
Accounts payable	(13,365)	6,424	8,361	10,789
Other accrued liabilities	(14,426)	14,896	(2,346)	9,377
Income taxes	(8,085)	6,260	6,675	(972)
Net cash (used in) provided by operating activities	17,261	(13,728)	79,564	43,471
Cash flows from investing activities:
Capital expenditures	(25,802)	(36,798)	(45,812)	(28,769)
Proceeds from disposal of assets	5,227	3,259	4,232	133
Net proceeds from sale of discontinued operations	0	0	13,295	0
Business acquisitions, net of cash acquired	(262,100)	0	(48,382)	(3,075)
Change in restricted cash	(5,000)	0	5,000	0
Change related to Venezuelan operations	0	0	0	(620)
Other	(105)	(457)	827	550
Net cash used in investing activities	(287,780)	(33,996)	(70,840)	(31,781)
Cash flows from financing activities:
Net debt borrowings (payments) on Credit Facility	103,000	(23,006)	15,996	8,000
Net (payments) borrowings under term loan	190,000	(170,000)	(20,000)	0
Issuance of convertible debt, net of issuance costs	0	222,311	0	0
Deferred consideration payments	(2,307)	0	(694)	(1,000)
Contingent consideration payments	(230)	(1,278)	(1,816)	(1,000)
Purchase of noncontrolling interest	(5,934)	0	0	0
Debt issuance costs on Credit Facility	(1,950)	(1,938)	(801)	0
Payments related to withholding tax for share-based payment arrangements	(1,375)	(947)	(1,709)	(1,775)
Corporate tax effect from share-based payment arrangements	374	0	(535)	3,034
Exercise of stock options	2,142	450	5,903	3,804
Issuance of common stock, net of issuance costs	0	0	5,243	0
Purchase of treasury stock	0	0	(7,593)	(21,138)
Net cash provided by (used in) financing activities	283,720	25,592	(6,006)	(10,075)
Effect of exchange rate changes on cash	(1,587)	2,468	(1,327)	(3,060)
Net (decrease) increase in cash and cash equivalents	11,614	(19,664)	1,391	(1,445)
Cash and cash equivalents at beginning of period	33,211	46,216	44,825	34,656
Cash and cash equivalents at end of period	44,825	26,552	46,216	33,211
Cash paid (refunded) during the year for:
Interest	3,907	13,176	12,207	2,028
Income taxes	$ 10,252	$ 5,719	$ (2,741)	$ 21,491