Investments - Sales and Maturities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 29, 2022	Oct. 23, 2021	Oct. 29, 2022	Oct. 23, 2021
Sales of Marketable Securities
Proceeds from sales	$ 8,418	$ 11,938	$ 12,664	$ 21,653
Gross realized gains	22	287	49	554
Gross realized losses	(70)	$ (325)	(126)	$ (336)
Fair Value of Available-For-Sale Securities By Contractual Maturity
Within one year	10,736		10,736
Within two to five years	11,336		11,336
Within six to ten years	586		586
Thereafter	1,926		1,926
Total	$ 24,584		$ 24,584

No definition available.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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- Definition

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27198-111563

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Amount of realized gain 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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of cash inflow from sale 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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