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Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended
Oct. 31, 2019
Nov. 30, 2019
Nov. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale of business, net of transaction costs   $ 8,726 $ 0
Impairment & divestiture charges   (1,356) 23,477
Engineered Components & Systems [Member] [Domain]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale of business, net of transaction costs $ 214,500    
Quarterly Installment Payments $ 3,000    
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax   (4,200)  
Asset Impairment Charges   (22,400)  
Income Tax Benefit Related to Write Down of Assets   (18,200)  
Impairment & divestiture charges   3,300  
Other Divestiture Charges   $ 2,700  
Precision-Hayes International [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Impairment & divestiture charges     9,500
Cortland Fibron [Domain]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Impairment & divestiture charges     $ 1,800