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Investments - Sales and Maturities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 28, 2023	Oct. 29, 2022	Oct. 28, 2023	Oct. 29, 2022
Sales of Marketable Securities
Proceeds from sales	$ 8,064	$ 8,418	$ 20,468	$ 12,664
Gross realized gains	1,715	22	1,876	49
Gross realized losses	(272)	$ (70)	(740)	$ (126)
Fair Value of Available-For-Sale Securities By Contractual Maturity
Within one year	6,405		6,405
Within two to five years	961		961
Securities not due at a single maturity date	6,348		6,348
Total	$ 13,714		$ 13,714

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