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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Employee Benefits and Share-based Compensation [Abstract]

Option Activity

Stock options activity under the stock option plans during the year ended December 31, 2013 was as follows:



	Outstanding Options
	Number of Shares		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(In thousands)		(In dollars)		(In years)	(In thousands)
December 31, 2012	4,324		$	29.29
Granted	503		33.45
Exercised	(352	)	21.28
Cancelled	(249	)	34.27
Expired	(61	)	33.78
December 31, 2013	4,165		$	30.11	6.5	$	16,376

As of December 31, 2013:
Vested and expected to vest	4,008		$	29.98	6.4	$	16,282
Exercisable Options	2,695		$	28.29	5.5	$	15,245

Schedule of Ranges of Outstanding And Exercisable Stock Options

The following table summarizes significant ranges of outstanding and exercisable stock options as of December 31, 2013:



	Options Outstanding				Options Exercisable
Range of Exercise Prices	Shares Outstanding	Weighted- Average Remaining Contractual Life	Weighted- Average Exercise Price Per Share		Shares Exercisable	Weighted- Average Exercise Price Per Share
	(In thousands)	(In years)	(In dollars)		(In thousands)	(In dollars)
$ 9.26 - $22.68	903	4.73	$	18.27	873	$	18.18
$23.25 - $31.31	849	5.73	29.58		617	29.23
$31.59 - $33.83	1,203	8.23	33.12		423	33.25
$33.92 - $38.01	959	6.72	35.56		629	35.39
$38.16 - $40.01	251	6.40	39.25		153	39.25
$9.26 - $40.01	4,165	6.50	$	30.11	2,695	$	28.29

Schedule Of RSU Activity

RSU Activity

RSU activity under during the year ended December 31, 2013 was as follows:



	Outstanding RSUs
	Number of Shares		Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(In thousands)		(In dollars)		(In years)	(In thousands)
December 31, 2012	112		$	28.36
RSUs granted	744		29.20
RSUs vested	(85	)	34.04
RSUs cancelled	(40	)	28.19
December 31, 2013	731		$	29.40	1.61	$	24,072

Schedule Of Valuation And Expense Information

The following table sets forth the weighted-average assumptions used to fair value option grants during the years ended December 31, 2013, 2012 and 2011 based on its historical experience:



	Year Ended December 31,
	2013		2012		2011
Expected life (in years)	4.4		4.4		4.4
Risk-free interest rate	0.72	%	0.64	%	1.63	%
Expected volatility	48.05	%	52.09	%	50.31	%
Dividend yield	—		—		—

Schedule Of Total Stock-Based Compensation Expense Resulting From Stock Options, Restricted Stock Awards, And The Employee Stock Purchase Plan

he following table sets forth the total stock-based compensation expense resulting from stock options, restricted stock awards, and the Employee Stock Purchase Plan included in the Company’s Consolidated Statements of Operations (in thousands):



	Year Ended December 31,
	2013		2012		2011
Cost of revenue	$	1,577	$	1,347	$	999
Research and development	3,943		2,787		2,476
Sales and marketing	5,379		4,751		5,136
General and administrative	6,563		5,487		5,151
Total	$	17,462	$	14,372	$	13,762