Marketable Securities (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
	Sep. 28, 2013 security	Mar. 30, 2013 security
Marketable Securities [Abstract]
Minimum Maturity Period Of Investments To Be Classified As Available For Sale Securities	90 days
Gross unrealized losses	$ 26,000	$ 164,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	34	43
Available For Sale Securities Amortized Cost On Gross Unrealized Losses	$ 77,400,000	$ 124,100,000