Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Apr. 24, 2021	Apr. 25, 2020
Investments
Total investments	$ 55,404	$ 48,022
Investments to enhance returns on cash
Investments
Total investments	32,475	28,622
Investments to fund compensation/retirement plans
Investments
Total investments	15,350	12,921
Other investments
Investments
Total investments	7,579	6,479
Short-term investments
Investments
Marketable securities	18,037	18,634
Held-to-maturity investments	2,532	3,337
Total investments	20,569	21,971
Long-term investments
Investments
Marketable securities	27,256	19,572
Cost basis investments	7,579	6,479
Total investments	$ 34,835	$ 26,051

Amount of investment in equity security without readily determinable fair value.

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