Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 03, 2011
Summary of the changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning of period	$ 23,756
Total Realized Gains (Losses)	44
Sales and Other Settlements	(23,800)
Balance, end of period
Auction rate securities [Member]
Summary of the changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning of period	22,317
Total Realized Gains (Losses)	1,483
Sales and Other Settlements	(23,800)
Balance, end of period
Put options related to auction rate securities [Member]
Summary of the changes in Level 3 assets measured at fair value on a recurring basis
Balance, beginning of period	1,439
Total Realized Gains (Losses)	(1,439)
Sales and Other Settlements
Balance, end of period