Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues	$ 302,385	$ 286,554
Operating expenses	226,851	211,750
Gross margin	75,534	74,804
Selling, general and administrative expenses	89,659	89,313
Restructuring and other related charges (credits), net	0	(1,247)
Gain on revaluation of contingent consideration	0	(1,174)
Operating loss	(14,125)	(12,088)
Interest expense, net	7,597	3,158
Gain on convertible debt embedded derivative	(4,547)	0
Other expense, net	47	341
Loss before income taxes	(17,222)	(15,587)
Less: Provision (benefit) for income taxes	623	(6,079)
Net loss	$ (17,845)	$ (9,508)
Basic loss per share	$ (0.60)	$ (0.32)
Diluted loss per share	$ (0.60)	$ (0.32)