Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations & Other Divestiture Charges Discontinued Operations & Divestiture Activities (Details)

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Discontinued Operations & Other Divestiture Charges Discontinued Operations & Divestiture Activities (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 02, 2019
Oct. 31, 2019
Oct. 22, 2019
Sep. 20, 2019
Dec. 31, 2018
Dec. 19, 2018
Feb. 29, 2020
Nov. 30, 2019
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Proceeds from sale of business, net of transaction costs                   $ 8,726,000 $ 0
Impairment & divestiture charges             $ (768,000)   $ 3,543,000 (2,124,000) 27,019,000
Other Divestiture Charges             900,000     2,500,000  
Impairment & Divestiture Benefit             800,000        
Engineered Components & Systems [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Asset Impairment Charges               $ (22,400,000)      
Income Tax Benefit Related to Write Down of Assets               18,200,000      
Disposal Date   Oct. 31, 2019                  
Proceeds from sale of business, net of transaction costs   $ 214,500,000                  
Quarterly Installment Payments   $ 3,000,000.0         700,000        
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax               (4,200,000)      
Impairment & divestiture charges             300,000 3,300,000      
Other Divestiture Charges               2,700,000      
Precision-Hayes International [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Date         Dec. 31, 2018            
Proceeds from sale of business, net of transaction costs         $ 23,600,000            
Impairment & divestiture charges                     9,500,000
Cortland Fibron [Domain]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Date           Dec. 19, 2018          
Proceeds from sale of business, net of transaction costs           $ 12,500,000          
Impairment & divestiture charges                 2,600,000   4,300,000
UNI-LIFT Product Line [Domain]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Date       Sep. 20, 2019              
Proceeds from sale of business, net of transaction costs       $ 6,000,000.0              
Contingent Proceeds           $ 1,500,000          
Impairment & divestiture charges       $ 4,600,000     (100,000)        
Milwaukee Cylinder (excluding UNI-LIFT) [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Date Dec. 02, 2019                    
Impairment & divestiture charges               4,600,000      
Goodwill, Impairment Loss               2,500,000      
Charges Associated with Withdrawl of Pension Plan               1,900,000      
Other Divestiture Charges               200,000      
Milwaukee Cylinder (including UNI-LIFT) [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Group, Not Discontinued Operation, annual revenue                 4,300,000 2,900,000 7,100,000
Connectors Product Line [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Disposal Date     Oct. 22, 2019                
Proceeds from sale of business, net of transaction costs     $ 2,700,000                
Impairment & divestiture charges             $ 100,000 $ 1,300,000      
Disposal Group, Not Discontinued Operation, annual revenue                 $ 1,000,000.0 $ 200,000 $ 2,500,000