Employee Stock Benefit Plans (Tables)

12 Months Ended

Dec. 28, 2012

Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]

Schedule Of Shares Authorized Under Stock Option Plan By Exercise Price Range

	Options Outstanding				Options Exercisable
Range	Number Outstanding	Weighted- Average Exercise  Price per Share		Weighted- Average Remaining Contractual Life (in years)	Number Exercisable	Weighted- Average Exercise  Price per Share
(in thousands, except for per share data)
$7.27 – $14.53	448	$	11.67	1.28	448	$	11.67
$14.54 – $19.96	907	18.90		2.83	724	18.65
$19.96 – $21.68	1,041	21.02		3.75	592	20.96
$21.69 – $28.00	664	26.00		1.77	629	25.93
$28.01 – $35.94	859	31.36		4.26	503	31.48
$35.95 – $41.22	1,171	37.61		3.98	657	38.57
$41.23 - $41.28	1,145	41.28		5.79	89	41.28
$41.29 - $46.00	772	43.12		5.39	140	43.08
$46.01 - $53.95	1,476	50.22		6.55	72	53.70
Total	8,483	$	33.85	4.40	3,854	$	26.52

Schedule Of Options Outstanding And Expected To Vest

	Number Of  Shares (in thousands)	Weighted- Average Exercise  Price per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Options outstanding	8,483	$	33.85	4.40	$	209,919
Options expected to vest	4,259	$	39.72	5.41	80,411
Options exercisable	3,854	$	26.52	3.14	123,653

Schedule Of Stock Options Activity

	Options		Weighted average exercise price
(in thousands, except for per share data)
Outstanding at the beginning of year	9,901		$	27.48
Granted	1,505		50.12
Exercised	(2,818	)	20.12
Cancelled	(105	)	34.10
Outstanding at the end of year	8,483		$	33.85
Available for grant	10,444

Schedule Of Restricted Stock Unit Activity

	Restricted Stock  Units		Weighted Average Grant-Date Fair Value
(in thousands, except for per share data)
Unvested at the beginning of year	1,124		$	26.01
Granted	368		48.32
Vested	(636	)	21.94
Cancelled	(84	)	25.79
Unvested at the end of year	772		$	41.31

Schedule Of Stock-Based Compensation Expense, Net Of Tax, Related To Employee Stock-Based Compensation (For All Plans)

Fiscal Years	2012		2011		2010
(in thousands)
Cost of sales	$	2,005	$	1,955	$	1,816
Research and development	5,319		4,624		3,991
Sales and marketing	7,017		6,672		5,611
General and administrative	18,319		15,200		11,707
Total operating expenses	30,655		26,496		21,309
Total stock-based compensation expense	32,660		28,451		23,125

Schedule Of Weighted-Average Assumptions Used In Employee Stock Purchase Plan

Fiscal Years	2012		2011		2010
Expected dividend yield	—		—		—
Expected stock price volatility	41	%	45	%	43	%
Risk free interest rate	0.62	%	1.13	%	1.39	%
Expected life of options	4.1 years		4.2 years		4.2 years

Schedule Of Weighted-Average Assumptions Used In Stock Options Granted

Fiscal Years	2012		2011		2010
Expected dividend yield	—		—		—
Expected stock price volatility	37.9	%	34.0	%	35.5	%
Risk free interest rate	0.10	%	0.16	%	0.20	%
Expected life of purchase	6 months		6 months		6 months