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Financial Instruments - Available-for-sale Securities (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Investments, All Other Investments [Abstract]    
Proceeds from sale of available-for-sale securities $ 4,982 $ 37,657
Gross realized gains on sale of available-for-sale securities 36 360
Gross realized losses on sale of available-for-sale securities (64) 0
Net realized (losses) gains on sale of available-for-sale securities (28) 360
Amortization of premiums (discounts) on available-for-sale securities $ 391 $ (91)