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Financial Instruments - Fair Value of Gross and Unrealized Losses (Details) - USD ($)
$ in Thousands
Apr. 03, 2021
Mar. 28, 2020
Fair values and gross unrealized losses of the investments    
Available-for-Sale Securities, Less Than 12 Months, Fair Value $ 40,113 $ 76,724
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (221) (389)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 10,016 34,408
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (130) (663)
Available-for-Sale Securities, Fair Value, Total 50,129 111,132
Available-for-Sale Securities, Gross Unrealized Losses, Total (351) (1,052)
Mortgage-Backed Securities [Member]    
Fair values and gross unrealized losses of the investments    
Available-for-Sale Securities, Less Than 12 Months, Fair Value 37,442 13,492
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (216) (88)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 9,835 31,819
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (129) (389)
Available-for-Sale Securities, Fair Value, Total 47,277 45,311
Available-for-Sale Securities, Gross Unrealized Losses, Total (345) (477)
Commercial Mortgage Backed Securities [Member]    
Fair values and gross unrealized losses of the investments    
Available-for-Sale Securities, Less Than 12 Months, Fair Value 2,671 30,593
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (5) (282)
Available-for-Sale Securities, 12 Months or Greater, Fair Value 181 2,589
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1) (274)
Available-for-Sale Securities, Fair Value, Total 2,852 33,182
Available-for-Sale Securities, Gross Unrealized Losses, Total $ (6) (556)
Asset-backed Securities [Member]    
Fair values and gross unrealized losses of the investments    
Available-for-Sale Securities, Less Than 12 Months, Fair Value   1,641
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (2)
Available-for-Sale Securities, 12 Months or Greater, Fair Value   0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   0
Available-for-Sale Securities, Fair Value, Total   1,641
Available-for-Sale Securities, Gross Unrealized Losses, Total   (2)
Debt Security, Government, Non-US [Member]    
Fair values and gross unrealized losses of the investments    
Available-for-Sale Securities, Less Than 12 Months, Fair Value   30,998
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (17)
Available-for-Sale Securities, 12 Months or Greater, Fair Value   0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   0
Available-for-Sale Securities, Fair Value, Total   30,998
Available-for-Sale Securities, Gross Unrealized Losses, Total   $ (17)