Investments - Components (Details) - USD ($) $ in Thousands	Jul. 30, 2016	Apr. 30, 2016
Investments
Total available-for-sale, trading, and held-to-maturity investments	$ 46,300	$ 46,976
Investments to enhance returns on cash
Investments
Total available-for-sale, trading, and held-to-maturity investments	32,749	33,583
Investments to fund compensation/retirement plans
Investments
Total available-for-sale, trading, and held-to-maturity investments	13,551	13,393
Other current assets
Investments
Available-for-sale investments	12,806	13,491
Trading securities	50
Held-to-maturity investments	1,829	1,826
Total available-for-sale, trading, and held-to-maturity investments	14,685	15,317
Other long-term assets
Investments
Available-for-sale investments	$ 31,615	$ 31,659

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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