Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:
Product	$ 48,375	$ 23,729	$ 110,310	$ 55,957
Subscription and services	65,836	18,923	172,370	48,333
Total revenue	114,211	42,652	282,680	104,290
Cost of revenue:
Product	15,440	7,358	39,515	18,124
Subscription and services	29,488	6,079	82,286	12,481
Total cost of revenue	44,928	13,437	121,801	30,605
Total gross profit	69,283	29,215	160,879	73,685
Operating expenses:
Research and development	54,707	20,492	150,085	44,570
Sales and marketing	111,625	44,414	283,070	110,577
General and administrative	30,119	11,704	89,150	29,385
Restructuring charges	2,769	0	2,769	0
Total operating expenses	199,220	76,610	525,074	184,532
Operating loss	(129,937)	(47,395)	(364,195)	(110,847)
Interest income	228	1	456	53
Interest expense	(6)	(243)	(17)	(519)
Other expense, net	(636)	(4,206)	(1,018)	(7,129)
Loss before income taxes	(130,351)	(51,843)	(364,774)	(118,442)
Benefit from income taxes	(10,320)	(917)	(26,710)	(320)
Net loss attributable to common stockholders	$ (120,031)	$ (50,926)	$ (338,064)	$ (118,122)
Net loss per share attributable to common stockholders, basic and diluted (usd per share)	$ (0.83)	$ (1.61)	$ (2.41)	$ (5.41)
Weighted average shares used in computing net loss per share attributable to common stockholders, basic and diluted (shares)	144,923	31,590	140,285	21,838