Marketable Securities (Schedule of Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 29, 2013	Mar. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 205,136	$ 170,294
Gross Unrealized Gains	35	15
Gross Unrealized Losses	(223)	(164)
Estimated Fair Value (Net Carrying Amount)	204,948	170,145
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	122,901	94,798
Gross Unrealized Gains	1	2
Gross Unrealized Losses	(219)	(133)
Estimated Fair Value (Net Carrying Amount)	122,683	94,667
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,337	34,380
Gross Unrealized Gains	5	4
Gross Unrealized Losses	(3)	(3)
Estimated Fair Value (Net Carrying Amount)	40,339	34,381
Agency Discount Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,022	1,027
Estimated Fair Value (Net Carrying Amount)	1,022	1,027
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,876	40,089
Gross Unrealized Gains	29	9
Gross Unrealized Losses	(1)	(28)
Estimated Fair Value (Net Carrying Amount)	$ 40,904	$ 40,070