Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 01, 2012	Dec. 26, 2010	Jan. 01, 2012	Dec. 26, 2010
Summary of stock-based compensation expense
Stock-based compensation expense	$ 8,100	$ 8,519	$ 25,787	$ 27,111
Cost of Revenues [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	632	599	2,075	1,962
Engineering and Development [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	3,553	3,714	11,776	12,692
Sales and Marketing [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	1,924	1,824	5,625	5,866
General and Administrative [Member]
Summary of stock-based compensation expense
Stock-based compensation expense	$ 1,991	$ 2,382	$ 6,311	$ 6,591