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Financial Instruments (Details 1) - USD ($)
$ in Thousands
Jan. 02, 2021
Mar. 28, 2020
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value $ 447,560 $ 76,724
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses (134) (389)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 12,925 34,408
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses (323) (663)
Available-for-Sale Securities, Fair Value, Total 460,485 111,132
Available-for-Sale Securities, Gross Unrealized Losses, Total (457) (1,052)
U.S. Government and Agency Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value 431,873  
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses (9)  
Available-for-Sale Securities, 12 Months or Greater, Fair Value 0  
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses 0  
Available-for-Sale Securities, Fair Value, Total 431,873  
Available-for-Sale Securities, Gross Unrealized Losses, Total (9)  
Debt Security, Government, Non-US [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value   30,998
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses   (17)
Available-for-Sale Securities, 12 Months or Greater, Fair Value   0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses   0
Available-for-Sale Securities, Fair Value, Total   30,998
Available-for-Sale Securities, Gross Unrealized Losses, Total   (17)
Mortgage-Backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value 13,052 13,492
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses (120) (88)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 12,287 31,819
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses (182) (389)
Available-for-Sale Securities, Fair Value, Total 25,339 45,311
Available-for-Sale Securities, Gross Unrealized Losses, Total (302) (477)
Asset-backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value   1,641
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses   (2)
Available-for-Sale Securities, 12 Months or Greater, Fair Value   0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses   0
Available-for-Sale Securities, Fair Value, Total   1,641
Available-for-Sale Securities, Gross Unrealized Losses, Total   (2)
Commercial Mortgage Backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-Sale Securities, Less Than 12 Months, Fair Value 2,635 30,593
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses (5) (282)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 638 2,589
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses (141) (274)
Available-for-Sale Securities, Fair Value, Total 3,273 33,182
Available-for-Sale Securities, Gross Unrealized Losses, Total $ (146) $ (556)