Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 302,719	$ 270,066	$ 298,550
Work-in-process	164,655	167,100	165,505
Finished goods	534,522	335,346	499,799
Other	15,497	14,610	14,089
Inventories, gross	1,017,393	787,122	977,943
Adjustment to value inventory at cost on the LIFO method	(109,588)	(109,588)	(156,495)
Inventories	$ 907,805	$ 677,534	$ 821,448

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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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