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Marketable Securities - Investment Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Investment income |  |  |
Investment income (loss) | $ 18,600 | $ 9,500 | $ 3,800
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |  |
Unrealized gain (loss) on equity securities | $ 1,020 | $ (275) | $ (1,325)

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