Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Product	$ 212,475	$ 160,141
Service	29,721	18,904
Total revenue	242,196	179,045
Cost of revenue:
Product	78,913	54,439
Service	8,193	6,852
Total cost of revenue	87,106	61,291
Total gross profit	155,090	117,754
Operating expenses:
Research and development	62,515	43,340
Sales and marketing	27,606	24,587
General and administrative	15,234	14,072
Total operating expenses	105,355	81,999
Income from operations	49,735	35,755
Other income (expense), net:
Interest expense	(751)	(821)
Other income (expense), net	337	(468)
Total other income (expense), net	(414)	(1,289)
Income before provision for income taxes	49,321	34,466
Provision for income taxes	14,076	9,974
Net income	35,245	24,492
Net income attributable to common stockholders:
Basic	34,921	24,032
Diluted	$ 34,941	$ 24,071
Net income per share attributable to common stockholders:
Basic (usd per share)	$ 0.52	$ 0.37
Diluted (usd per share)	$ 0.48	$ 0.34
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	67,737	64,635
Diluted (in shares)	72,214	70,722