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Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands	May 31, 2025	Aug. 31, 2024	May 31, 2024
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 84,403	$ 84,725	$ 83,750
Work in process	8,330	10,192	13,235
Finished goods and purchased parts, net	78,594	80,877	96,295
Total inventory value before LIFO adjustment	171,327	175,794	193,280
Less adjustment to LIFO value	(20,865)	(21,341)	(21,758)
Inventories, net	$ 150,462	$ 154,453	$ 171,522

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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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-Topic 210
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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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-Topic 852
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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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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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