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Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) (USD $) In Thousands	3 Months Ended
	Jul. 03, 2011	Jun. 27, 2010
Stock-based compensation expense	$ 9,667	$ 10,323
Cost Of Revenues [Member]
Stock-based compensation expense	808	734
Engineering And Development [Member]
Stock-based compensation expense	4,631	5,007
Sales And Marketing [Member]
Stock-based compensation expense	1,857	2,113
General And Administrative [Member]
Stock-based compensation expense	$ 2,371	$ 2,469

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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