Stockholder's Equity and Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Stockholder's Equity and Stock Based Compensation

Summary of stock option activity

	Number of Stock Options Outstanding		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(Years)	(in thousands)
Balance as of December 31, 2014	5,404		$	11.55	7.56	$	120,595
Granted	—		—
Exercised	(278	)	3.47
Repurchased	—		—
Cancelled/forfeited	(157	)	12.79
Balance as of March 31, 2015	4,969		11.96		7.18	80,350
Exercisable as of March 31, 2015	4,163		7.27		7.01	79,948
Vested and expected to vest as of March 31, 2015	4,682		$	11.50	7.13	$	77,198

Schedule of weighted average grant date fair value of options granted and the total intrinsic value of options exercised

The weighted average grant date fair value of options granted and the total intrinsic value of options exercised were as follows (in thousands, except weighted average grant date fair value):

	Three Months Ended March 31,
	2015		2014
Weighted average grant date fair value of options granted	N/A		$	21.78
Total intrinsic value of options exercised	$	7,583	$	28,623

Schedule of assumptions used for estimation of fair value of options granted to employees

	Three Months Ended March 31,
	2015	2014
Expected term (in years)	N/A	6
Risk-free interest rate	N/A	1.84%
Expected volatility	N/A	56%
Expected dividend rate	N/A	0%

Summary of Restricted Stock Units RSUs activity

	Number of RSUs		Weighted Average Grant Date  Fair Value		Aggregate Intrinsic Value
	(in thousands)				(in thousands)
Balance as of December 31, 2014	2,360		$	33.30	$	77,207
RSUs Granted	1,082		34.50
RSUs Vested	(215	)	41.36
RSUs Cancelled/Forfeited	(108	)	32.70
Balance as of March 31, 2015	3,119		$	33.18	$	79,922

Schedule of weighted average grant date fair value of RSU granted and the total fair value

The weighted average grant date fair value of RSUs granted and the total intrinsic value of RSUs that vested during the periods presented were as follows (in thousands, except weighted average grant date fair value):

	Three Months Ended March 31,
	2015		2014
Weighted average grant date fair value of RSUs granted	$	34.50	$	41.57
Total intrinsic value of vested RSUs	$	6,029	$	195

Schedule of market performance based compensation restricted stock units (MSU) award activity

	Number of Shares Underlying MSUs	Weighted Average Grant Date Fair Value		Weighted Average Remaining Vesting Period	Aggregate Intrinsic Value
	(in thousands)			(in years)	(in thousands)
Balance as of December 31, 2014	—	$	—	—	$	—
MSUs Granted	240	37.53
MSUs Vested	—	—
MSUs Cancelled/Forfeited	—	—
Balance as of March 31, 2015	240	$	37.53	1.88	$	6,144

Schedule of weighted average assumptions used to estimate fair value of market performance based compensation restricted stock units (MSU) awards

	Three Months
	Ended March 31, 2015
Expected term (in years)	3
Risk-free interest rate	0.99%
Expected volatility	39%
Expected dividend rate	0%

Schedule of assumptions used to value employee stock purchase rights under the Black-Scholes model

	Three Months Ended March 31,
	2015	2014
Expected term (in months)	6	6 - 9
Risk-free interest rate	0.05 - 0.07%	0.08% - 0.11%
Expected volatility	39% - 43%	41% - 42%
Expected dividend rate	0%	0%

Schedule of stock-based compensation expense included in operating results

The stock-based compensation expense included in operating results was allocated as follows (in thousands):

	Three Months Ended March 31,
	2015		2014
Cost of subscription and support revenue	$	619	$	384
Cost of professional services and other revenue	937		447
Research and development	2,316		1,079
Sales and marketing	2,802		1,779
General and administrative	2,607		1,318
Total stock-based compensation expense	$	9,281	$	5,007

Schedule of total unrecognized compensation cost related to unvested awards not yet recognized under all equity compensation plans, adjusted for estimate forfeitures

	March 31, 2015
	Unrecognized Expense		Average Expected Recognition Period
	(in thousands)		(in years)
Stock options	$	16,493	1.94
Restricted stock units and market stock units	79,485		3.12
Employee stock purchase plan	585		0.38
Total unrecognized stock-based compensation expense	$	96,563	2.90