Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Mar. 27, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 76,329	$ 365,192
Gross Unrealized Gains	45	3,579
Gross Unrealized Losses	(537)	(315)
Estimated Fair Value (Net Carrying Amount)	75,837	368,456
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	70,243	348,971
Gross Unrealized Gains	45	3,403
Gross Unrealized Losses	(499)	(313)
Estimated Fair Value (Net Carrying Amount)	69,789	352,061
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	509	13,462
Gross Unrealized Gains	0	172
Gross Unrealized Losses	(1)	(1)
Estimated Fair Value (Net Carrying Amount)	508	13,633
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,377
Gross Unrealized Gains	0
Gross Unrealized Losses	(35)
Estimated Fair Value (Net Carrying Amount)	5,342
Agency discount notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	200	2,759
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(2)	(1)
Estimated Fair Value (Net Carrying Amount)	$ 198	$ 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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Amount, before tax, of unrealized loss 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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Amortized cost excluding accrued interest, after allowance for credit loss, of 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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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Amount excluding accrued interest, of 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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