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Reclassifications Out of Accumulated Other Comprehensive Income (Loss) to Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Apr. 03, 2022 | Apr. 04, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Reclassifications, tax | $ 18 | $ 123
Unrealized (Losses) Gains on Marketable Securities |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Reclassifications, tax | 18 | 123
Amortization of Prior Service Credit |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Reclassifications, tax | $ 0 | $ 0

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