CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net revenues	$ 624,333	$ 316,159	$ 286,166
Cost of revenues	403,088	221,714	230,123
Gross profit	221,245	94,445	56,043
Operating expenses:
Research and development	40,381	32,587	33,157
Sales and marketing	36,728	27,047	23,126
General and administrative	38,808	29,086	22,221
Restructuring charges	2,599	4,129	16,917
Total operating expenses	118,516	92,849	95,421
Income (loss) from operations	102,729	1,596	(39,378)
Other expense, net
Interest income	2,513	1,058	276
Interest expense	(9,691)	(10,693)	(8,212)
Other (expense) income, net	(5,437)	(2,190)	1,973
Total other expense, net	(12,615)	(11,825)	(5,963)
Income (loss) before income taxes	90,114	(10,229)	(45,341)
Income tax benefit (provision)	71,034	(1,398)	149
Net income (loss)	$ 161,148	$ (11,627)	$ (45,192)
Net income (loss) per share:
Basic (in USD per share)	$ 1.38	$ (0.12)	$ (0.54)
Diluted (in USD per share)	$ 1.23	$ (0.12)	$ (0.54)
Shares used in per share calculation:
Basic (in shares)	116,713	99,619	82,939
Diluted (in shares)	131,644	99,619	82,939