Stock-Based Compensation (Tables)

12 Months Ended

Dec. 27, 2014

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

Schedule Of Stock-Based Compensation Expense

	Year Ended
	December 27,		December 28,		December 29,
(in thousands)	2014		2013		2012
Cost of revenues	$	966	$	899	$	875
Research and development		9,420		11,095		11,583
Selling, general and administrative		12,795		14,270		13,857
Total	$	23,181	$	26,264	$	26,315

Schedule Of Activity Under Option Plans

				Weighted average
		Weighted average		remaining	Aggregate intrinsic
	Number of	exercise price per		contractual term	value at December 27,
	options	share		(years)	2014
Outstanding, December 28, 2013	23,555,472	$	8.01	4.88	$	6,834,586
Granted	745,237	$	7.07		$	1,530,333
Exercised	(2,941,897)	$	6.23		$	5,042,000
Forfeited	(3,042,092)	$	13.05		$	—
Outstanding, December 27, 2014	18,316,720	$	7.53	4.41	$	32,598,999
Exercisable, December 27, 2014	16,305,889	$	7.65	3.92	$	27,467,565

Schedule Of Options Outstanding And Exercisable For The Combined Option Plans

	Options Outstanding				Options Exercisable
		Weighted	Weighted			Weighted
		Average	Average			Average
		Remaining	Exercise			Exercise
	Options	Contractual	Price per		Options	Price per
Range of Exercise Prices	Outstanding	Life (years)	Share		Exercisable	Share
$0.05   –  $6.08	3,758,742	5.23	$	5.15	3,257,572	$	5.09
$6.09   –  $7.22	5,235,527	6.16		6.85	3,856,794		6.87
$7.24   –  $8.06	4,138,072	2.99		7.87	4,109,945		7.87
$8.15   –  $10.97	5,133,779	3.22		9.66	5,030,978		9.69
$11.32 –  $12.43	50,600	1.08		11.79	50,600		11.79
$0.05   –  $12.43	18,316,720	4.41	$	7.53	16,305,889	$	7.65

Summary Of Performance Based Equity Portion Percentage Of Equity Award

			Executives
	CEO		other than CEO
	2014	2013	2014	2013
Options	25%	50%	25%	25%
Time-based RSUs	25%	25%	25%	50%
Performance RSUs	50%	25%	50%	25%

Schedule Of Summary Of RSU Activity

		Weighted Average
	Restricted	Remaining	Aggregate
	Stock Units	Contractual Term	intrinsic value
Unvested units at December 28, 2013	6,179,037	1.74	$	39,545,837
Awarded	4,063,220	—	$	—
Released	(1,985,007)	—	$	—
Forfeited	(888,721)	—	$	—
Unvested units at December 27, 2014	7,368,529	1.73	$	67,200,984
Restricted Stock Units expected to vest December 27, 2014	6,396,998	1.63	$	58,340,617

Stock Option Plan [Member]

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

Schedule Of Fair Value Assumptions

	December 27,	December 28,	December 29,
	2014	2013	2012
Expected life (years)	5.8	5.9	5.4
Expected volatility	32%	40%	42%
Risk-free interest rate	1.8%	1.6%	0.8%
Forfeiture rate	9.5%	8.5%	12.1%

Employee Stock Purchase Plan [Member]

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

Schedule Of Fair Value Assumptions

	December 27,	December 28,	December 29,
	2014	2013	2012
Expected life (years)	0.5	0.5	0.5
Expected volatility	35%	35%	42%
Risk-free interest rate	0.5%	0.1%	0.2%
Forfeiture rate	9.5%	8.5%	12.1%