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Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands | Nov. 30, 2019 | Aug. 31, 2019 | Nov. 30, 2018
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Inventory Disclosure [Abstract] |  |  |
Raw materials and supplies | $ 47,266 | $ 49,047 | $ 40,781
Work in process | 6,235 | 4,514 | 9,601
Finished goods and purchased parts, net | 51,908 | 46,812 | 46,925
Total inventory value before LIFO adjustment | 105,409 | 100,373 | 97,307
Less adjustment to LIFO value | (8,125) | (8,086) | (8,395)
Inventories, net | $ 97,284 | $ 92,287 | $ 88,912

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