Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 244,859	$ 288,860	$ 230,847
Work-in-process	135,685	123,574	133,271
Finished goods	418,702	335,180	449,133
Other	12,850	13,075	12,858
Inventory, Gross, Total	812,096	760,689	826,109
Adjustment to value inventory at cost on the LIFO method	(125,883)	(125,883)	(82,823)
Inventories	$ 686,213	$ 634,806	$ 743,286

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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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