Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 333,202	$ 270,066	$ 294,896
Work-in-process	152,429	167,100	154,157
Finished goods	370,134	335,346	370,406
Other	16,005	14,610	15,217
Inventories, gross	871,770	787,122	834,676
Adjustment to value inventory at cost on the LIFO method	(109,588)	(109,588)	(156,495)
Inventories	$ 762,182	$ 677,534	$ 678,181

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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