Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 298,550	$ 286,953	$ 271,396
Work-in-process	165,505	134,417	141,268
Finished goods	499,799	355,337	523,145
Other	14,089	12,793	12,658
Inventory, Gross, Total	977,943	789,500	948,467
Adjustment to value inventory at cost on the LIFO method	(156,495)	(156,495)	(125,883)
Inventories	$ 821,448	$ 633,005	$ 822,584

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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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