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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands | Apr. 27, 2019 | Apr. 28, 2018
--- | --- | ---
Summary of investments |  |
Gross Unrealized Gains | $ 2,174 | $ 2,243
Gross Unrealized Losses | (124) | (457)
Fair Value | 57,421 | 59,354
Equity securities |  |
Summary of investments |  |
Gross Unrealized Gains | 1,841 | 2,142
Gross Unrealized Losses |  | (39)
Fair Value | 19,535 | 18,765
Fixed income |  |
Summary of investments |  |
Gross Unrealized Gains | 75 | 29
Gross Unrealized Losses | (111) | (418)
Fair Value | 33,217 | 36,312
Other |  |
Summary of investments |  |
Gross Unrealized Gains | 258 | 72
Gross Unrealized Losses | (13) |
Fair Value | $ 4,669 | $ 4,277

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