Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

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

Schedule of Stock Based Compensation Expense

The following table summarizes the components of total stock-based compensation expense included in the Company’s consolidated statements of operations for the years ended December 31, 2013, 2012 and 2011 (in thousands):

	2013			2012			2011
Cost of revenues	$	10,867		$	11,309		$	9,654
Research and development expense	17,472			17,275			11,125
Sales and marketing expense	39,290			34,322			20,697
General and administrative expense	28,255			27,679			19,829
Total stock-based compensation	95,884			90,585			61,305
Provision for income taxes	(34,829		)	(33,126		)	(21,212		)
Total stock-based compensation, net of taxes	$	61,055		$	57,459		$	40,093

Schedule of Stock Options Granted Black Scholes

The grant-date fair values of the Company's stock option awards granted during the years ended December 31, 2013, 2012 and 2011 were estimated using the Black-Scholes option pricing model with the following weighted-average assumptions:

	2013		2012		2011
Expected term (in years)	4.5		4.2		4.2
Risk-free interest rate	0.8	%	0.6	%	1.3	%
Expected volatility	44.4	%	50.8	%	48.9	%
Dividend yield	—	%	—	%	—	%

Schedule of ESPP Granted Black Scholes

The grant-date fair values of the Company's ESPP awards granted during the years ended December 31, 2013, 2012 and 2011 were estimated using the Black-Scholes option pricing model with the following weighted-average assumptions:

	2013		2012		2011
Expected term (in years)	0.5		0.5		0.5
Risk-free interest rate	0.1	%	0.1	%	0.1	%
Expected volatility	42.0	%	51.0	%	43.7	%
Dividend yield	—	%	—	%	—	%

Schedule of Summary of Stock Option Activity

The following table summarizes stock option activity during the year ended December 31, 2013:

	Shares (in thousands)		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2013	6,223		$	26.30
Granted	515		38.07
Exercised	(2,127	)	19.34
Expired	(153	)	36.82
Outstanding at December 31, 2013	4,458		$	30.67	3.34	$	210,719
Exercisable at December 31, 2013	3,303		$	29.56	2.51	$	155,813
Vested or expected to vest December 31, 2013	4,416		$	30.53	3.30	$	208,353

Schedule Of Deferred Stock Units Activity

The following table summarizes the DSU activity for the year ended December 31, 2013:

	Units (in thousands)		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2013	285		$	25.93
Granted	35		48.03
Vested	(82	)	17.90
Outstanding at December 31, 2013	238		$	32.01

Schedule of Restricted Stock Units by Type

The following table summarizes the different types of restricted stock units ("RSUs") granted by the Company during the years ended December 31, 2013, 2012 and 2011 (in thousands):

	December 31, 2013	December 31, 2012	December 31, 2011
RSUs with service-based vesting conditions	2,338	2,782	3,003
RSUs with performance-based vesting conditions	760	369	550
Total	3,098	3,151	3,553

Schedule of Restricted Stock Units Activity

The following table summarizes the RSU activity for the year ended December 31, 2013:

	Units (in thousands)		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2013	5,946		$	32.97
Granted	3,098		37.96
Vested	(2,837	)	31.46
Forfeited	(669	)	32.68
Outstanding at December 31, 2013	5,538		$	36.43