Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Product	$ 407,617	$ 291,367
Service	64,872	44,108
Total revenue	472,489	335,475
Cost of revenue:
Product	156,691	109,836
Service	12,879	11,429
Total cost of revenue	169,570	121,265
Gross profit	302,919	214,210
Operating expenses:
Research and development	102,362	81,610
Sales and marketing	42,140	37,027
General and administrative	19,679	22,155
Total operating expenses	164,181	140,792
Income from operations	138,738	73,418
Other income (expense), net:
Interest expense	(687)	(715)
Other income (expense), net	4,843	1,025
Total other income (expense), net	4,156	310
Income before benefit from income taxes	142,894	73,728
Benefit from income taxes	(1,644)	(9,233)
Net income	144,538	82,961
Net income attributable to common stockholders:
Basic	144,449	82,694
Diluted	$ 144,456	$ 82,716
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 1.95	$ 1.16
Diluted (in dollars per share)	$ 1.79	$ 1.07
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	73,994	71,114
Diluted (in shares)	80,721	77,516