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Employee Benefit Plans (Tables)

6 Months Ended

Jun. 28, 2015

Employee Benefits and Share-based Compensation [Abstract]

Option Activity

Stock option activity during the six months ended June 28, 2015 was as follows:



	Number of shares		Weighted Average Exercise Price Per Share
	(in thousands)		(in dollars)
Outstanding at December 31, 2014	3,939		$	30.58
Granted	296		31.34
Exercised	(192	)	23.25
Cancelled	(119	)	33.16
Expired	(195	)	34.89
Outstanding at June 28, 2015	3,729		$	30.71

Schedule Of RSU Activity

RSU Activity

RSU activity during the six months ended June 28, 2015 was as follows:



	Number of shares		Weighted Average Grant Date Fair Value Per Share
	(in thousands)		(in dollars)
Outstanding at December 31, 2014	858		$	30.68
RSUs granted	452		32.24
RSUs vested	(250	)	30.96
RSUs cancelled	(87	)	31.57
Outstanding at June 28, 2015	973		$	31.62

Schedule Of Valuation And Expense Information

The table below sets forth the weighted average assumptions used to estimate the fair value of option grants during the three and six months ended June 28, 2015 and June 29, 2014.



	Three Months Ended				Six Months Ended
	June 28, 2015		June 29, 2014		June 28, 2015		June 29, 2014
Expected life (in years)	4.5		4.5		4.5		4.5
Risk-free interest rate	1.45	%	1.44	%	1.44	%	1.44	%
Expected volatility	39.3	%	42.6	%	39.3	%	42.6	%
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 stock-based compensation expense resulting from stock options, RSUs and the ESPP included in the Company’s unaudited condensed consolidated statements of operations (in thousands):



	Three Months Ended				Six Months Ended
	June 28, 2015		June 29, 2014		June 28, 2015		June 29, 2014
Cost of revenue	$	336	$	489	$	832	$	960
Research and development	773		1,227		1,618		2,623
Sales and marketing	1,272		1,401		2,665		3,350
General and administrative	1,677		1,817		3,291		3,131
Total stock-based compensation	$	4,058	$	4,934	$	8,406	$	10,064