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Investments (Details) - USD ($)
$ in Thousands
Sep. 28, 2019
Mar. 30, 2019
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale debt securities $ 12,181 $ 13,408
Marketable equity securities 12,649 11,073
Non-marketable equity investments 20,926 20,276
Investments 45,756 44,757
Payments to acquire interest in joint venture $ 15,000 $ 15,000