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Stock Based Compensation (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
Stock Based Compensation (Details) (USD $) In Thousands	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Stock-based compensation expense
Total stock-based compensation expense	$ 11,753	$ 14,004	$ 39,072	$ 42,301
Cost of revenues [Member]
Stock-based compensation expense
Total stock-based compensation expense	1,460	1,822	5,324	5,223
Research and development [Member]
Stock-based compensation expense
Total stock-based compensation expense	5,410	6,047	18,286	18,817
Selling, general and administrative [Member]
Stock-based compensation expense
Total stock-based compensation expense	$ 4,883	$ 6,135	$ 15,462	$ 18,261

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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