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Stock Based Compensation (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
Stock Based Compensation (Details) (USD $) In Thousands	Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010
Stock-based compensation expense
Total stock-based compensation expense	$ 13,652	$ 15,174	$ 27,319	$ 28,297
Cost of revenues [Member]
Stock-based compensation expense
Total stock-based compensation expense	2,051	1,985	3,864	3,401
Research and development [Member]
Stock-based compensation expense
Total stock-based compensation expense	6,653	6,750	12,876	12,770
Selling, general and administrative [Member]
Stock-based compensation expense
Total stock-based compensation expense	$ 4,948	$ 6,439	$ 10,579	$ 12,126

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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