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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands | Oct. 27, 2018 | Apr. 28, 2018
--- | --- | ---
Summary of investments |  |
Gross Unrealized Gains | $ 2,137 | $ 2,243
Gross Unrealized Losses | (443) | (457)
Fair Value | 54,285 | 59,354
Equity securities |  |
Summary of investments |  |
Gross Unrealized Gains | 1,889 | 2,142
Gross Unrealized Losses | (99) | (39)
Fair Value | 18,525 | 18,765
Fixed income |  |
Summary of investments |  |
Gross Unrealized Gains | 27 | 29
Gross Unrealized Losses | (333) | (418)
Fair Value | 31,339 | 36,312
Other |  |
Summary of investments |  |
Gross Unrealized Gains | 221 | 72
Gross Unrealized Losses | (11) |
Fair Value | $ 4,421 | $ 4,277

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