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Investments - Components (Details) - USD ($) $ in Thousands | Apr. 28, 2018 | Apr. 29, 2017
--- | --- | ---
Investments |  |
Total investments | $ 59,354 | $ 53,677
Investments to enhance returns on cash |  |
Investments |  |
Total investments | 34,359 | 33,087
Investments to fund compensation/retirement plans |  |
Investments |  |
Total investments | 14,041 | 13,690
Other investments |  |
Investments |  |
Total investments | 10,954 | 6,900
Other current assets |  |
Investments |  |
Available-for-sale investments | 12,832 | 15,040
Trading securities | 94 | 6
Held-to-maturity investments | 3,340 | 1,867
Total investments | 16,266 | 16,913
Other long-term assets |  |
Investments |  |
Available-for-sale investments | 32,134 | 31,264
Cost basis investments | 10,954 | 5,500
Total investments | $ 43,088 | $ 36,764

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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75025870&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75027002&loc=d3e40346-111594 + Details
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