Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Mar. 30, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 307,990	$ 228,757
Gross Unrealized Gains	1,584	1,035
Gross Unrealized Losses	(3,993)	(641)
Estimated Fair Value (Net Carrying Amount)	305,581	229,151
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	286,668	215,098
Gross Unrealized Gains	1,157	1,027
Gross Unrealized Losses	(3,993)	(600)
Estimated Fair Value (Net Carrying Amount)	283,832	215,525
Non-US government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,483	13,209
Gross Unrealized Gains	260	8
Gross Unrealized Losses	0	(40)
Estimated Fair Value (Net Carrying Amount)	12,743	13,177
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,839
Gross Unrealized Gains	167
Gross Unrealized Losses	0
Estimated Fair Value (Net Carrying Amount)	$ 9,006
Agency discount notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		450
Gross Unrealized Gains		0
Gross Unrealized Losses		(1)
Estimated Fair Value (Net Carrying Amount)		$ 449

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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