Share-Based Compensation-Expense Recognition (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 20,253	$ 14,358	$ 39,333	$ 28,949
Total tax benefit recognized	(4,676)	(3,349)	(9,845)	(7,732)
Decrease in net income	15,577	11,009	29,488	21,217
Stock options and SARs [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	9,426	6,966	18,642	15,648
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	8,608	5,271	16,502	9,110
Employee Stock Purchase Plan Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	2,219	2,121	4,189	4,191
Cost of product revenues [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	1,923	1,090	3,460	2,032
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	10,623	7,684	20,650	14,928
Sales and marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	3,634	2,867	7,263	5,042
General and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 4,073	$ 2,717	$ 7,960	$ 6,947