Employee Benefit Plans (Tables)

9 Months Ended

Sep. 27, 2015

Employee Benefits and Share-based Compensation [Abstract]

Schedule Of Stock Option Activity

Option Activity

Stock option activity during the nine months ended September 27, 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	(262	)	23.44
Cancelled	(128	)	33.23
Expired	(246	)	34.82
Outstanding at September 27, 2015	3,599		$	30.78

Schedule Of RSU Activity

RSU Activity

RSU activity during the nine months ended September 27, 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	468		32.13
RSUs vested	(259	)	31.04
RSUs cancelled	(108	)	31.44
Outstanding at September 27, 2015	959		$	31.59

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 nine months ended September 27, 2015 and September 28, 2014.

	Three Months Ended		Nine Months Ended
	September 27, 2015	September 28, 2014	September 27, 2015	September 28, 2014
Expected life (in years)	N/A	N/A	4.5	4.5
Risk-free interest rate	N/A	N/A	1.44%	1.44%
Expected volatility	N/A	N/A	39.3%	42.6%
Dividend yield	N/A	N/A	—	—

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				Nine Months Ended
	September 27, 2015		September 28, 2014		September 27, 2015		September 28, 2014
Cost of revenue	$	358	$	573	$	1,190	$	1,533
Research and development	877		1,255		2,495		3,878
Sales and marketing	1,173		1,409		3,838		4,759
General and administrative	1,703		1,925		4,994		5,056
Total stock-based compensation	$	4,111	$	5,162	$	12,517	$	15,226