Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Jun. 26, 2021	Mar. 27, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 370,005	$ 365,192
Gross Unrealized Gains	2,465	3,579
Gross Unrealized Losses	(324)	(315)
Estimated Fair Value (Net Carrying Amount)	372,146	368,456
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	353,303	348,971
Gross Unrealized Gains	2,343	3,403
Gross Unrealized Losses	(315)	(313)
Estimated Fair Value (Net Carrying Amount)	355,331	352,061
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,945	13,462
Gross Unrealized Gains	121	172
Gross Unrealized Losses	(6)	(1)
Estimated Fair Value (Net Carrying Amount)	13,060	13,633
Agency discount notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,757	2,759
Gross Unrealized Gains	1	4
Gross Unrealized Losses	(3)	(1)
Estimated Fair Value (Net Carrying Amount)	$ 3,755	$ 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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