CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenues:
Products	$ 63,740	$ 88,945	$ 223,841	$ 245,124
Services	55,279	48,491	172,794	121,665
Total net revenues	119,019	137,436	396,635	366,789
Cost of revenues:
Products	26,793	32,256	82,405	92,416
Services	14,885	15,416	45,126	46,054
Amortization of intangible assets	1,950	1,950	5,850	2,113
Total cost of revenues	43,628	49,622	133,381	140,583
Gross profit	75,391	87,814	263,254	226,206
Operating expenses:
Research and development	19,953	25,225	62,791	71,708
Marketing and selling	27,231	31,564	89,027	92,420
General and administrative	13,822	15,834	48,359	52,646
Amortization of intangible assets	567	786	2,135	1,568
Restructuring costs, net	5,314	0	7,878	539
Total operating expenses	66,887	73,409	210,190	218,881
Operating income	8,504	14,405	53,064	7,325
Interest expense	(4,702)	(2,469)	(13,702)	(3,722)
Other expense, net	(5)	(50)	(347)	(959)
Income before income taxes	3,797	11,886	39,015	2,644
(Benefit from) provision for income taxes	(5,321)	768	(3,983)	(4,221)
Net income	$ 9,118	$ 11,118	$ 42,998	$ 6,865
Net income per common share – basic and diluted	$ 0.23	$ 0.28	$ 1.08	$ 0.17
Weighted-average common shares outstanding – basic	40,194	39,231	39,814	39,417
Weighted-average common shares outstanding – diluted	40,476	39,750	39,950	40,727