Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Stock-based compensation costs
Total employee stock-based compensation recognized in statement of operations	$ 4,800	$ 6,002
Amount capitalized in inventory		14
Total stock-based compensation	4,800	6,016
Cost of revenue [Member]
Stock-based compensation costs
Total employee stock-based compensation recognized in statement of operations	794	747
Research and development expense [Member]
Stock-based compensation costs
Total employee stock-based compensation recognized in statement of operations	1,724	1,836
Selling, general and administrative expense [Member]
Stock-based compensation costs
Total employee stock-based compensation recognized in statement of operations	$ 2,282	$ 3,419