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Marketable Securities - Investment Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 29, 2025 | Mar. 30, 2024
Investment income |  |
Investment income (loss) | $ 4,800 | $ 4,100
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |
Unrealized gain (loss) on equity securities | $ 1,066 | $ 234

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