Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Product	$ 235,616	$ 174,072	$ 448,091	$ 334,213
Service	33,125	21,480	62,846	40,384
Total revenue	268,741	195,552	510,937	374,597
Cost of revenue:
Product	88,021	60,014	166,934	114,453
Service	9,269	7,648	17,462	14,500
Total cost of revenue	97,290	67,662	184,396	128,953
Total gross profit	171,451	127,890	326,541	245,644
Operating expenses:
Research and development	69,020	49,947	131,535	93,287
Sales and marketing	31,744	26,681	59,350	51,268
General and administrative	17,529	18,403	32,763	32,475
Total operating expenses	118,293	95,031	223,648	177,030
Income from operations	53,158	32,859	102,893	68,614
Other income (expense), net:
Interest expense	(732)	(832)	(1,483)	(1,653)
Other income (expense), net	416	417	753	(51)
Total other income (expense), net	(316)	(415)	(730)	(1,704)
Income before provision for income taxes	52,842	32,444	102,163	66,910
Provision for income taxes	13,938	8,448	28,014	18,422
Net income	38,904	23,996	74,149	48,488
Net income attributable to common stockholders:
Basic	38,617	23,607	73,535	47,594
Diluted	$ 38,635	$ 23,638	$ 73,573	$ 47,667
Net income per share attributable to common stockholders:
Basic (usd per share)	$ 0.57	$ 0.36	$ 1.08	$ 0.73
Diluted (usd per share)	$ 0.53	$ 0.33	$ 1.01	$ 0.67
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	68,275	65,524	68,006	65,018
Diluted (in shares)	72,817	71,215	72,523	70,919