Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 141,906	$ 138,718
Work-in-process	91,520	129,736
Finished goods	286,034	235,415
Total	$ 519,460	$ 503,869

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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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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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