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Marketable Securities (Narrative) (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Dec. 25, 2021 USD ($) security | Mar. 27, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items] |  |
Gross unrealized losses | $ 537 | $ 315
Amortized cost on available for sale securities held at gross unrealized loss | $ 67,000 | $ 92,000
Securities in a continuous unrealized loss position for more than 12 months, number of securities | security | 0 | 0
Minimum |  |
Debt Securities, Available-for-sale [Line Items] |  |
Maturity period for highly-rated securities | 1 year |
Maximum |  |
Debt Securities, Available-for-sale [Line Items] |  |
Maturity period for highly-rated securities | 3 years |

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