Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Product	$ 216,632	$ 178,246	$ 88,253
Subscription and services	406,335	247,416	73,299
Total revenue	622,967	425,662	161,552
Cost of revenue:
Product	74,481	58,980	28,912
Subscription and services	158,723	116,113	18,853
Total cost of revenue	233,204	175,093	47,765
Total gross profit	389,763	250,569	113,787
Operating expenses:
Research and development	279,467	203,187	66,036
Sales and marketing	476,166	401,151	167,466
General and administrative	141,790	121,099	52,503
Restructuring charges	0	4,327	0
Total operating expenses	897,423	729,764	286,005
Operating loss	(507,660)	(479,195)	(172,218)
Interest income	2,935	713	68
Interest expense	(27,116)	(26)	(525)
Other expense, net	(3,284)	(1,936)	(7,257)
Loss before income taxes	(535,125)	(480,444)	(179,932)
Provision for (benefit from) income taxes	4,090	(36,654)	(59,297)
Net loss attributable to common stockholders	$ (539,215)	$ (443,790)	$ (120,635)
Net loss per share attributable to common stockholders, basic and diluted	$ (3.50)	$ (3.12)	$ (2.66)
Weighted average shares used to compute net loss per share attributable to common stockholders, basic and diluted	154,120	142,176	45,271