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Marketable Securities - SERP Investments (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 28, 2025 | Sep. 27, 2025 | Sep. 28, 2024 | Sep. 27, 2025 | Sep. 28, 2024
Marketable Securities |  |  |  |  |
Investment income (loss) and interest expense |  | $ 3,276 | $ 7,848 | $ 12,981 | $ 17,461
Subsequent Event |  |  |  |  |
Marketable Securities |  |  |  |  |
Selling in equity securities | $ 7,200 |  |  |  |
Selling in corporate and municipal bonds | $ 24,400 |  |  |  |
Supplemental Employee Retirement Plan |  |  |  |  |
Marketable Securities |  |  |  |  |
Investment income (loss) and interest expense |  | $ 1,600 | $ 1,600 | $ 3,400 | $ 3,400

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