Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 365,192	$ 307,990
Gross Unrealized Gains	3,579	1,584
Gross Unrealized Losses	(315)	(3,993)
Estimated Fair Value (Net Carrying Amount)	368,456	305,581
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	348,971	286,668
Gross Unrealized Gains	3,403	1,157
Gross Unrealized Losses	(313)	(3,993)
Estimated Fair Value (Net Carrying Amount)	352,061	283,832
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,462	12,483
Gross Unrealized Gains	172	260
Gross Unrealized Losses	(1)	0
Estimated Fair Value (Net Carrying Amount)	13,633	12,743
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
U.S. 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

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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