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Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($)
$ in Thousands
Jun. 29, 2024
Dec. 30, 2023
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value $ 24,483 $ 3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss 127 42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value 84,044 103,453
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss 5,410 6,621
Available-for-sale investments with unrealized losses, Fair Value, Total 108,527 106,959
Available-for-sale investments with unrealized losses, Unrealized Loss, Total 5,537 6,663
Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value 1,986 0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss 1 0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value 13,029 14,307
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss 2,013 2,236
Available-for-sale investments with unrealized losses, Fair Value, Total 15,015 14,307
Available-for-sale investments with unrealized losses, Unrealized Loss, Total 2,014 2,236
Corporate bonds, commercial paper and direct obligations of government agencies    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value 22,497 3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss 126 42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value 69,774 86,841
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss 3,389 4,342
Available-for-sale investments with unrealized losses, Fair Value, Total 92,271 90,347
Available-for-sale investments with unrealized losses, Unrealized Loss, Total 3,515 4,384
U.S. Treasury obligations    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value 0 0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss 0 0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value 1,241 2,305
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss 8 43
Available-for-sale investments with unrealized losses, Fair Value, Total 1,241 2,305
Available-for-sale investments with unrealized losses, Unrealized Loss, Total $ 8 $ 43