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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands | Apr. 28, 2018 | Apr. 29, 2017
--- | --- | ---
Summary of investments |  |
Gross Unrealized Gains | $ 2,243 | $ 2,526
Gross Unrealized Losses | (457) | (163)
Fair Value | 59,354 | 53,677
Equity securities |  |
Summary of investments |  |
Gross Unrealized Gains | 2,142 | 1,796
Gross Unrealized Losses | (39) | (83)
Fair Value | 18,671 | 13,610
Fixed income |  |
Summary of investments |  |
Gross Unrealized Gains | 29 | 729
Gross Unrealized Losses | (418) | (72)
Fair Value | 36,312 | 37,580
Mutual funds |  |
Summary of investments |  |
Fair Value | 94 | 6
Other |  |
Summary of investments |  |
Gross Unrealized Gains | 72 | 1
Gross Unrealized Losses |  | (8)
Fair Value | $ 4,277 | $ 2,481

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