Investments - Components (Details) - USD ($) $ in Thousands	Jan. 27, 2018	Apr. 29, 2017
Investments
Total investments	$ 61,044	$ 53,677
Investments to enhance returns on cash
Investments
Total investments	35,401	33,087
Investments to fund compensation/retirement plans
Investments
Total investments	14,689	13,690
Other investments
Investments
Total investments	10,954	6,900
Other current assets
Investments
Available-for-sale investments	12,737	15,040
Trading securities	12	6
Held-to-maturity investments	3,358	1,867
Total investments	16,107	16,913
Other long-term assets
Investments
Available-for-sale investments	33,983	31,264
Cost basis investments	10,954	5,500
Total investments	$ 44,937	$ 36,764

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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