Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2012

Employee Benefits and Share-based Compensation [Abstract]

Schedule Of Stock Option Activity

Option Activity

Stock options activity under the stock option plans during the year ended December 31, 2012 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, 2011	3,950		$	27.03
Granted	1,332		34.01
Exercised	(548	)	23.16
Cancelled and expired	(410	)	30.98
December 31, 2012	4,324		$	29.29	7.4	$	43,887
As of December 31, 2012:
Vested and expected to vest	4,030		$	29.06	7.3	$	41,837
Exercisable Options	2,100		$	25.94	6.0	$	28,342

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, 2012:

	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)
$0.00 - 10.00	1	1.56	$	9.26	1	$	9.26
10.01 - 20.00	489	5.22	13.45		466	13.42
20.01 - 30.00	1,262	6.04	24.82		935	25.31
30.01 - 40.00	2,463	8.46	34.26		680	35.01
40.01 - 50.00	109	9.09	40.01		18	40.01
Total	4,324	7.40	$	29.29	2,100	$	25.94

Schedule Of RSU Activity

RSU activity under during the year ended December 31, 2012 was as follows:

	Outstanding RSUs
	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, 2011	177		27.86
RSUs granted	51		31.79
RSUs vested	(105	)	28.77
RSUs cancelled	(11	)	32.42
December 31, 2012	112		$	28.36	1.08	$	4,419

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, 2012, 2011 and 2010 based on its historical experience:

	Year Ended December 31,
	2012		2011		2010
Expected life (in years)	4.4		4.4		4.4
Risk-free interest rate	0.64	%	1.63	%	1.74	%
Expected volatility	52.09	%	50.31	%	49.87	%
Dividend yield	—		—		—

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

The 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,
	2012		2011		2010
Cost of revenue	$	1,347	$	999	$	913
Research and development	2,787		2,476		2,271
Sales and marketing	4,751		5,136		4,710
General and administrative	5,487		5,151		4,307
Total	$	14,372	$	13,762	$	12,201