Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Sep. 25, 2021	Mar. 27, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 75,720	$ 365,192
Gross Unrealized Gains	241	3,579
Gross Unrealized Losses	(83)	(315)
Estimated Fair Value (Net Carrying Amount)	75,878	368,456
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,235	348,971
Gross Unrealized Gains	230	3,403
Gross Unrealized Losses	(80)	(313)
Estimated Fair Value (Net Carrying Amount)	72,385	352,061
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,688	13,462
Gross Unrealized Gains	11	172
Gross Unrealized Losses	0	(1)
Estimated Fair Value (Net Carrying Amount)	1,699	13,633
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,797
Gross Unrealized Gains	0
Gross Unrealized Losses	(3)
Estimated Fair Value (Net Carrying Amount)	$ 1,794
Agency discount notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,759
Gross Unrealized Gains		4
Gross Unrealized Losses		(1)
Estimated Fair Value (Net Carrying Amount)		$ 2,762

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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