Equity Awards (Tables)

6 Months Ended

Jun. 30, 2017

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

Schedule of Stock Option Activity

A summary of the stock option activity for the six months ended June 30, 2017 is as follows:

	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2016	5,818,435		$	20.57
Granted	566,720		84.81
Exercised	(697,446	)	15.77			$	51,560
Canceled	(38,334	)	71.68
Outstanding at March 31, 2017	5,649,375		$	27.26
Granted	50,000		103.60
Exercised	(705,807	)	8.62			$	62,617
Canceled	(1,174	)	57.78
Outstanding at June 30, 2017	4,992,394		$	30.65	5.57	$	376,150
Vested and expected to vest as of June 30, 2017	4,919,086		$	29.99	5.52	$	373,914
Vested and exercisable as of June 30, 2017	3,772,067		$	15.16	4.42	$	342,656

Schedule of Restricted Stock Unit Activity

A summary of RSU activity for the six months ended June 30, 2017 is as follows:

	Number of Shares		Weighted Average Grant Date Fair Value (Per Share)		Aggregate Intrinsic Value (in thousands)
Non-vested at December 31, 2016	12,222,282		$	63.66
Granted	4,216,410		88.05
Vested	(1,801,659	)	55.73		$	164,367
Forfeited	(507,680	)	73.14
Non-vested at March 31, 2017	14,129,353		71.60
Granted	763,940		97.79
Vested	(1,177,903	)	63.84		$	115,487
Forfeited	(445,303	)	68.78
Non-vested at June 30, 2017	13,270,087		$	73.89	$	1,406,629