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Investments - Sales and Maturities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 22, 2022 | Jan. 23, 2021 | Jan. 22, 2022 | Jan. 23, 2021
Sales of marketable securities |  |  |  |
Proceeds from sales | $ 7,784 | $ 6,807 | $ 29,437 | $ 23,824
Gross realized gains | 142 | 169 | 696 | 479
Gross realized losses | (20) | $ (15) | (356) | $ (41)
Fair value of available-for-sale securities by contractual maturity |  |  |  |
Within one year | 14,832 |  | 14,832 |
Within two to five years | 16,341 |  | 16,341 |
Within six to ten years | 967 |  | 967 |
Thereafter | 1,640 |  | 1,640 |
Total | $ 33,780 |  | $ 33,780 |

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- Definition Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References No definition available. + Details
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