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v3.19.1

Marketable Securities (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 30, 2019 USD ($) | Mar. 31, 2018 USD ($) security
Debt Securities, Available-for-sale [Line Items] |  |
Gross unrealized losses | $ 641 | $ 2,433
Amortized cost on available for sale securities held at gross unrealized loss | 123,100 | $ 198,200
Securities in a continuous unrealized loss position for more than 12 months, amortized cost | 120,300 |
Securities in a continuous unrealized loss position for more than 12 months, aggregate unrealized loss | $ 600 |
Securities in a continuous unrealized loss position for more than 12 months, number of securities | security |  | 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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