Share-Based Compensation (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Share Based Compensation
Share-based compensation expense	$ 19,080	$ 14,591
Total tax benefit recognized	(5,169)	(4,383)
Decrease in net income	13,911	10,208
Stock options and SARs [Member]
Share Based Compensation
Share-based compensation expense	9,216	8,683
Restricted Stock units [Member]
Share Based Compensation
Share-based compensation expense	7,894	3,839
Employee Stock Purchase Plan Shares [Member]
Share Based Compensation
Share-based compensation expense	1,970	2,069
Cost of product revenues [Member]
Share Based Compensation
Share-based compensation expense	1,537	943
Research and Development [Member]
Share Based Compensation
Share-based compensation expense	10,027	7,244
Sales and marketing [Member]
Share Based Compensation
Share-based compensation expense	3,629	2,174
General and administrative [Member]
Share Based Compensation
Share-based compensation expense	$ 3,887	$ 4,230