Summary of Significant Accounting Policies and Concentrations of Risk (Other) (Details) (USD $)	12 Months Ended
	Mar. 28, 2015 Customer	Mar. 29, 2014 Customer	Mar. 30, 2013 Customer
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	54.00%
Deferred revenue	87,700,000	75,200,000
Net deferred cost of revenues	21,600,000	20,100,000
Deferred income on shipments to distributors	$ 66,071,000	$ 55,099,000
Number Of End Customers Accounted For Net Revenues	0	0	0