Stock-Based Compensation (Tables)

9 Months Ended

Sep. 26, 2015

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

Schedule Of Stock-Based Compensation Expense

	Three Months Ended				Nine Months Ended
	September 26,		September 27,		September 26,		September 27,
(in thousands)	2015		2014		2015		2014
Cost of revenues	$	266	$	226	$	803	$	681
Research and development, net		2,266		1,990		7,510		6,540
Selling, general and administrative		2,658		3,012		9,681		9,113
Total	$	5,190	$	5,228	$	17,994	$	16,334

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	847,892	$	6.73
Exercised	(4,017,595)	$	6.66
Forfeited	(136,344)	$	6.55
Expired	(1,025,118)	$	9.48
Outstanding, September 26, 2015	13,985,555	$	7.60	4.27	$	2,734,065
Vested and expected to vest, September 26, 2015	13,731,955	$	7.62	4.18	$	2,722,645
Exercisable, September 26, 2015	12,046,856	$	7.75	3.53	$	2,509,015

Schedule Of Fair Value Weighted Average Assumptions

	Nine Months Ended
	September 26,	September 27,
	2015	2014
Expected life (years)	5.9	5.8
Expected volatility	30%	33%
Risk-free interest rate	1.8%	1.8%

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	3,492,249		-		—
Released	(2,242,344)		-		—
Forfeited	(712,317)		-		—
Unvested units at September 26, 2015	7,906,117		1.83	$	50,361,965
Restricted Stock Units expected to vest at September 26, 2015	6,784,932		1.73	$	43,220,018

2011 Employee Stock Purchase Plan [Member]

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

Schedule Of Fair Value Weighted Average Assumptions

	Nine Months Ended
	September 26,	September 27,
	2015	2014
Expected life (years)	0.5	0.5
Expected volatility	34%	35%
Risk-free interest rate	0.2%	0.1%