Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Apr. 25, 2020	Apr. 27, 2019
Investments
Total investments	$ 48,022	$ 57,421
Investments to enhance returns on cash
Investments
Total investments	28,622	31,470
Investments to fund compensation/retirement plans
Investments
Total investments	12,921	13,972
Other investments
Investments
Total investments	6,479	11,979
Short-term investments
Investments
Marketable securities	18,634	18,016
Held-to-maturity investments	3,337	3,341
Total investments	21,971	21,357
Long-term investments
Investments
Marketable securities	19,572	24,085
Cost basis investments	6,479	11,979
Total investments	$ 26,051	$ 36,064

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

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