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Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Nov. 30, 2018	Aug. 31, 2018	Nov. 30, 2017
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 40,781	$ 36,316	$ 34,410
Work in process	9,601	9,176	10,074
Finished goods and purchased parts	46,925	40,197	55,590
Total inventory value before LIFO adjustment	97,307	85,689	100,074
Less adjustment to LIFO value	(8,395)	(6,456)	(6,080)
Inventories, net	$ 88,912	$ 79,233	$ 93,994

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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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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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