Benefit Plans (Details 4) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Stock-based compensation costs
Total employee stock-based compensation expense	$ 5,092	$ 3,419	$ 11,094	$ 6,663
Amount capitalized as inventory	(14)	(5)	0	25
Total stock-based compensation	5,078	3,414	11,094	6,688
Total employee stock-based compensation in operating expense [Member]
Stock-based compensation costs
Total employee stock-based compensation expense	4,330	2,892	9,585	5,657
Research and Development Expense [Member]
Stock-based compensation costs
Total employee stock-based compensation expense	1,771	1,158	3,607	2,266
Selling general and administrative expense [Member]
Stock-based compensation costs
Total employee stock-based compensation expense	2,559	1,734	5,978	3,391
Cost of Revenue [Member]
Stock-based compensation costs
Total employee stock-based compensation expense	$ 762	$ 527	$ 1,509	$ 1,006