Equity Award Plans (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Assumptions used in the Black-Scholes Option-Pricing Model to Determine Fair Value of Stock Options

The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine the fair value of our stock options granted:

	Year Ended December 31,
	2014	2013
Fair value of common stock	$27.89 - $75.87	$6.05 - $42.37
Risk-free interest rate	1.8% - 2.0%	0.6% - 2.1%
Expected term (in years)	6	4 - 6
Volatility	51% - 53%	46% - 54%
Dividend yield	—%	—%

Summary of Assumptions used in the Black-Scholes Option-Pricing Model to Determine Fair Value of Common Shares to be Issued under the ESPP

The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine fair value of our common shares to be issued under the ESPP:

	Year Ended December 31,
	2015	2014	2013
Fair value of common stock	$19.10 - $35.16	$27.08 - $32.32	$20.00
Risk-free interest rate	0.09% - 0.50%	0.1%	0.1%
Expected term (in years)	0.5 - 1.0	0.5 - 1.0	0.7 - 1.2
Volatility	38% - 42%	35% - 45%	42% - 45%
Dividend yield	— %	— %	— %

Schedule of Stock-based Compensation Expense Related to Stock Options, ESPP and restricted Stock Units and Awards

Total stock-based compensation expense related to stock options, ESPP and restricted stock units and awards is included in the consolidated statements of operations as follows (in thousands):

	Year Ended December 31,
	2015		2014		2013
Cost of product revenue	$	1,588	$	888	$	469
Cost of subscription and services revenue	29,435		17,037		2,341
Research and development	68,329		28,968		6,958
Sales and marketing	73,286		66,773		10,748
General and administrative	49,793		38,186		8,342
Total	$	222,431	$	151,852	$	28,858

Summary of Activity for Stock Option Changes and Information Related to Options Vested and Expected to Vest and Options Exercisable

A summary of the activity for our stock option changes during the reporting periods and a summary of information related to options vested and expected to vest and options exercisable are presented below (in thousands, except per share and contractual life amounts and years):

	Options Outstanding
	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Grant Date Fair Value		Weighted- Average Contractual Life (years)	Aggregate Intrinsic Value
Balance — December 31, 2012	17,336		$	0.98			8.3	$	77,250
Option granted	13,182		9.57		$	5.71
Options exercised	(6,222	)	0.88					41,599
Options canceled	(1,453	)	3.60
Options assumed in acquisition	4,579		5.93
Balance — December 31, 2013	27,422		$	5.82			8.3	$	1,036,224
Option granted	676		72.60		$	72.60
Options exercised	(7,642	)	2.97					271,236
Options canceled	(1,941	)	9.10
Options assumed in acquisition	63		20.60
Balance — December 31, 2014	18,578		$	9.13			7.4	$	445,636
Option granted	—		—		$	—
Options exercised	(5,856	)	4.97					211,854
Options cancelled	(1,228	)	14.57
Balance — December 31, 2015	11,494		$	10.67			6.9	$	149,157
Options vested and expected to vest — December 31, 2015	11,376		$	10.60			6.8	$	148,013
Options exercisable — December 31, 2015	7,226		$	8.89			6.6	$	102,036

Summary of Activity of Restricted Common Stock, RSAs and RSUs and Information Related to Unvested Restricted Stock, RSAs and RSUs and those Expected to Vest

A summary of the activity for our restricted common stock, RSAs and RSUs during the reporting periods and a summary of information related to unvested restricted common stock, RSAs and RSUs and those expected to vest are presented below (in thousands, except per share data and years):

	Number of Shares		Weighted- Average Grant-Date Fair Value		Weighted- Average Contractual Life (years)	Aggregate Intrinsic Value
Unvested balance — December 31, 2012	3,009		$	2.20
Granted	1,949		31.59
Vested	(2,115	)	3.26
Canceled/forfeited	(262	)	6.73
Granted in connection with acquisitions	1,021		37.65
Unvested balance — December 31, 2013	3,602		$	27.20
Granted	6,734		42.12
Vested	(1,482	)	16.04
Canceled/forfeited	(809	)	40.93
Granted in connection with acquisitions	296		26.44
Unvested balance — December 31, 2014	8,341		$	39.57
Granted	16,876		32.25
Vested	(2,783	)	35.66
Canceled/forfeited	(2,380	)	41.11
Unvested balance — December 31, 2015	20,054		$	33.68	1.6	$	415,912
Expected to vest — December 31, 2015	18,822		$	33.78	1.6	390,359