Summary of Significant Accounting Policies and Concentrations of Risk (Other) (Details) (USD $)	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Summary of Significant Accounting Policies and Concentrations of Risk [Abstract]
Held-to-maturity Securities	$ 0	$ 0
Impairment of goodwill	0
Percentage of net revenues from products sold to distributors	58.00%
Deferred revenue	71,300,000	90,000,000
Net deferred cost of revenues	17,900,000	23,000,000
Deferred income on shipments to distributors	$ 53,358,000	$ 67,002,000