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Other Financial Statement Information - Inventories - Net (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Inventory Disclosure [Abstract] |  |
Raw materials | $ 53,947 | $ 49,729
Work-in-process | 9,272 | 9,352
Finished products | 38,801 | 45,760
Inventory, gross | 102,020 | 104,841
Excess of current cost over LIFO cost | (4,483) | (4,667)
Noncurrent portion of inventory | 0 | (4,456)
Inventories - net | $ 97,537 | $ 95,718

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