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Investments (Amortized cost and fair value) (Details) - USD ($) $ in Thousands | Oct. 01, 2022 | Apr. 02, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 20,523 | $ 18,270
Fair Value | 19,488 | 17,760
Residential mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,161 | 1,668
Fair Value | 3,059 | 1,613
State and political subdivision debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 6,560 | 10,100
Fair Value | 6,208 | 9,906
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 10,802 | 6,502
Fair Value | $ 10,221 | $ 6,241

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