Inventories (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 90,451	$ 63,384
Work-in-process	59,180	51,176
Finished goods	78,628	43,607
Total inventory	$ 228,259	$ 158,167

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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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