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Other Financial Statement Information - Inventories - Net (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Inventory Disclosure [Abstract] |  |
Raw materials | $ 60,987 | $ 53,947
Work-in-process | 10,654 | 9,272
Finished Goods | 40,065 | 38,801
Inventory, gross | 111,706 | 102,020
Excess of current cost over LIFO cost | (6,278) | (4,483)
Net Inventory | $ 105,428 | $ 97,537

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