Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Product	$ 178,246	$ 88,253	$ 52,265
Subscription and services	247,416	73,299	31,051
Total revenue	425,662	161,552	83,316
Cost of revenue:
Product	58,980	28,912	14,467
Subscription and services	116,113	18,853	3,163
Total cost of revenue	175,093	47,765	17,630
Total gross profit	250,569	113,787	65,686
Operating expenses:
Research and development	203,187	66,036	16,522
Sales and marketing	401,151	167,466	67,562
General and administrative	121,099	52,503	15,221
Restructuring charges	4,327	0	0
Total operating expenses	729,764	286,005	99,305
Operating loss	(479,195)	(172,218)	(33,619)
Interest income	713	68	7
Interest expense	(26)	(525)	(537)
Other expense, net	(1,936)	(7,257)	(2,572)
Loss before income taxes	(480,444)	(179,932)	(36,721)
Benefit from income taxes	(36,654)	(59,297)	(965)
Net loss attributable to common stockholders	$ (443,790)	$ (120,635)	$ (35,756)
Net loss per share attributable to common stockholders, basic and diluted (usd per share)	$ (3.12)	$ (2.66)	$ (3.28)
Weighted average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	142,176	45,271	10,917