Employee Benefits And Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation [Abstract]

Classification Of Stock-Based Compensation

The following table presents the classification of stock-based compensation:

	Year Ended December 31,
	2014		2013		2012
	(In thousands)
Stock-based compensation:
Cost of revenues	$	6,400	$	6,156	$	5,754
Sales and marketing	8,023		6,252		6,091
Research and development	7,018		7,199		6,023
General and administrative	22,536		17,042		15,494
Total stock-based compensation	$	43,977	$	36,649	$	33,362

Nature Of Total Stock-Based Compensation

The following table presents the nature of the Company’s total stock-based compensation:

	Year Ended December 31,
	2014			2013			2012
	(In thousands)
RSUs	$	32,304		$	29,123		$	28,874
Performance-based RSUs	10,232			5,033			1,933
ESPP	4,192			5,307			4,436
Stock options	—			179			956
Capitalization (Included in Property and equipment, net)	(2,751		)	(2,993		)	(2,837		)
Total stock-based compensation expense	$	43,977		$	36,649		$	33,362

Weighted-Average Assumptions Used To Estimate Fair Value

The following table sets forth the weighted-average assumptions used to estimate the fair value of ESPP awards:

	Year Ended December 31,
	2014		2013		2012
Volatility	24	%	26	%	26	%
Risk-free interest rate	0.16	%	0.14	%	0.16	%
Expected term	1.25 years		1.25 years		1.25 years
Dividend yield	Zero		Zero		Zero

Summary Of Unvested RSUs Activity

The following table summarizes unvested RSUs activity:

	Year Ended December 31,
	2014				2013				2012
	Shares		Weighted-Average Grant-Date Fair Value		Shares		Weighted-Average Grant-Date Fair Value		Shares		Weighted-Average Grant-Date Fair Value
	(Shares in thousands)
Unvested at beginning of period	2,442		$	38.00	2,478		$	32.07	2,345		$	27.33
Granted	909		55.05		1,132		45.08		1,341		38.20
Vested and settled	(878	)	35.99		(900	)	30.73		(881	)	27.57
Forfeited	(294	)	44.00		(268	)	36.09		(327	)	32.34
	2,179		$	46.36	2,442		$	38.00	2,478		$	32.07