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Stock-Based Compensation (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
Stock-Based Compensation (Details) (USD $) In Thousands	Oct. 02, 2011	Sep. 26, 2010	Oct. 02, 2011	Sep. 26, 2010
Summary of stock-based compensation expense
Stock-based compensation expense	$ 8,020	$ 8,269	$ 17,687	$ 18,592
Cost of Revenues [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	635	629	1,443	1,363
Engineering and Development [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	3,592	3,971	8,223	8,978
Sales and Marketing [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	1,844	1,929	3,701	4,042
General and Administrative [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	$ 1,949	$ 1,740	$ 4,320	$ 4,209

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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