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Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands | Mar. 29, 2025 | Dec. 28, 2024
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Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value | $ 23,606 | $ 28,072
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 51 | 206
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 61,808 | 72,205
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 2,822 | 3,590
Available-for-sale investments with unrealized losses, Fair Value, Total | 85,414 | 100,277
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | 2,873 | 3,796
Asset-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value | 3,270 | 9,663
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 9 | 37
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 12,538 | 12,596
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 1,481 | 1,733
Available-for-sale investments with unrealized losses, Fair Value, Total | 15,808 | 22,259
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | 1,490 | 1,770
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 | 20,336 | 18,409
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 42 | 169
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 49,270 | 59,609
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 1,341 | 1,857
Available-for-sale investments with unrealized losses, Fair Value, Total | 69,606 | 78,018
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | $ 1,383 | $ 2,026

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