Accumulated Other Comprehensive Income (Loss) (Comprehensive Income Components) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income and other, net	$ (1,620)	$ (1,016)	$ (3,272)	$ (2,834)
Unrealized holding gains on available-for-sale investments | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income and other, net			$ (393)