Stock-Based Compensation (Tables)

6 Months Ended

Jun. 27, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock-Based Compensation Expense

	Three Months Ended				Six Months Ended
	June 27,		June 28,		June 27,		June 28,
(in thousands)	2015		2014		2015		2014
Cost of revenues	$	266	$	214	$	537	$	455
Research and development, net		2,400		1,903		5,244		4,550
Selling, general and administrative		3,445		2,798		7,023		6,101
Total	$	6,111	$	4,915	$	12,804	$	11,106

Schedule Of Activity Under Option Plans

	Number of options	Weighted average exercise price per share		Weighted average remaining contractual term (years)		Aggregate intrinsic value
Outstanding, December 27, 2014	18,316,720	$	7.53	4.41	$	32,598,999
Granted	30,000	$	8.88			—
Exercised	(3,848,159)	$	6.73			—
Forfeited	(126,839)	$	6.55			—
Expired	(313,441)	$	10.46			—
Outstanding, June 27, 2015	14,058,281	$	7.70	4.16	$	20,210,660
Vested and expected to vest, June 27, 2015	13,921,444	$	7.71	4.05	$	19,930,285
Exercisable, June 27, 2015	12,660,615	$	7.82	3.69	$	17,076,637

Schedule Of Fair Value Weighted Average Assumptions

	Six Months Ended
	June 27,	June 28,
	2015	2014
Expected life (years)	5.9	N/A
Expected volatility	31%	N/A
Risk-free interest rate	1.6%	N/A

Summary Of RSU Activity

	Restricted Stock Units	Weighted Average Remaining Contractual Term (years)			Aggregate intrinsic value
Unvested units at December 27, 2014	7,368,529		1.73	$	67,200,984
Awarded	659,694		-		—
Released	(609,901)		-		—
Forfeited	(453,677)		-		—
Unvested units at June 27, 2015	6,964,645		1.40	$	61,637,108
Restricted Stock Units expected to vest at June 27, 2015	6,193,026		1.31	$	54,808,280

Employee Stock Purchase Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Fair Value Weighted Average Assumptions

	Six Months Ended
	June 27,	June 28,
	2015	2014
Expected life (years)	0.5	0.5
Expected volatility	34%	35%
Risk-free interest rate	0.1%	0.1%