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Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands | Jan. 25, 2020 | Apr. 27, 2019
--- | --- | ---
Summary of investments |  |
Gross Unrealized Gains | $ 2,497 | $ 2,174
Gross Unrealized Losses | (6,008) | (124)
Fair Value | 50,814 | 57,421
Equity securities |  |
Summary of investments |  |
Gross Unrealized Gains | 1,922 | 1,841
Fair Value | 13,600 | 19,535
Fixed income |  |
Summary of investments |  |
Gross Unrealized Gains | 199 | 75
Gross Unrealized Losses | (8) | (111)
Fair Value | 31,962 | 33,217
Other |  |
Summary of investments |  |
Gross Unrealized Gains | 376 | 258
Gross Unrealized Losses | 0 | (13)
Fair Value | $ 5,252 | $ 4,669

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