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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Sale of Businesses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
Sale of Businesses (Details) - USD ($) $ in Thousands	Aug. 31, 2018	May 31, 2018	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Apr. 20, 2018
Sale of Businesses
Revenue from Contract with Customer, Excluding Assessed Tax			$ 261,162	$ 281,351	$ 284,188
Proceeds from the sale of property and assets				$ 400	$ 2,232
Structural Composites Rod Business
Sale of Businesses
Total proceeds received or to be received						$ 2,232
Pre-tax book gain from the sale of property and assets		$ 1,480
Proceeds from the sale of property and assets	$ 157	$ 2,075