Common Stock, Preferred Stock and Equity Plans (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of stock and stock equity plans

The following table contains information about the Company’s equity plans:

			As of December 31, 2016
Title of Plan	Group Eligible	Type of Award Granted	Awards Outstanding	Additional Awards Authorized for Grant
2013 Stock and Option Plan	Employees, Non-employee Directors and Consultants	NSO, RS and RSU	9,832,269	9,180,002
2006 Stock and Option Plan	Employees, Non-employee Directors and Consultants	NSO, RS and RSU	6,355,357	—
		Total	16,187,626	9,180,002

Outstanding and vested options

The following table summarizes information related to the outstanding and exercisable options during the year ended December 31, 2016:

	Stock Options		Weighted-average Exercise Price		Weighted-average Remaining Contractual Life	Aggregate Intrinsic Value
	(in thousands)		(per share)		(in years)	(in thousands)
Outstanding at December 31, 2015	11,145		$	75.99
Granted	3,183		$	91.36
Exercised	(1,064	)	$	45.61
Forfeited	(544	)	$	94.62
Expired	(78	)	$	107.51
Outstanding at December 31, 2016	12,642		$	81.41	7.06	$	124,939
Exercisable at December 31, 2016	7,323		$	68.92	6.00	$	121,671
Exercisable and Expected to Vest at December 31, 2016	12,200		$	80.76	7.00	$	124,892

Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at December 31, 2016:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted-average Remaining Contractual Life	Weighted-average Exercise Price		Number Exercisable	Weighted-average Exercise Price
	(in thousands)	(in years)	(per share)		(in thousands)	(per share)
$18.93–$20.00	137	1.10	$	18.93	137	$	18.93
$20.01–$40.00	1,696	3.19	$	33.94	1,696	$	33.94
$40.01–$60.00	1,867	5.59	$	48.26	1,762	$	48.44
$60.01–$80.00	1,345	7.11	$	75.90	891	$	75.60
$80.01–$100.00	4,529	8.45	$	90.60	1,548	$	89.61
$100.01–$120.00	1,604	8.05	$	109.33	702	$	109.29
$120.01–$134.69	1,464	8.53	$	130.58	587	$	130.17
Total	12,642	7.06	$	81.41	7,323	$	68.92

Restricted stock and restricted stock units activity

The following table summarizes the restricted stock and restricted stock unit activity of the Company during the year ended December 31, 2016:

	Restricted Stock				Restricted Stock Units
	Number of Units		Weighted-average Grant-date Fair Value		Number of Shares		Weighted-average Grant-date Fair Value
	(in thousands)		(per share)		(in thousands)		(per share)
Unvested at December 31, 2015	2,831		$	98.80	193		$	98.36
Granted	857		$	91.49	847		$	90.46
Vested	(817	)	$	79.28	(59	)	$	83.13
Cancelled	(258	)	$	98.56	(48	)	$	94.54
Unvested at December 31, 2016	2,613		$	102.54	933		$	92.35

Shares issued under Employee Stock Purchase Plan

In 2016, the following shares were issued to employees under the ESPP:

	Year Ended December 31, 2016
	(in thousands, except per share amount)
Number of shares	272
Average price paid per share	$	70.70