Quarterly report pursuant to Section 13 or 15(d)

Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details)

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Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Feb. 28, 2021
Aug. 31, 2020
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 127,254 $ 121,976
Gross Carrying Value 186,234 184,358
Net Book Value $ 58,980 62,382
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 14 years  
Gross Carrying Value $ 143,325 141,853
Accumulated Amortization 111,267 106,491
Net Book Value $ 32,058 35,362
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 14,547 14,365
Accumulated Amortization 13,635 13,228
Net Book Value $ 912 1,137
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 3,321 3,277
Accumulated Amortization 2,352 2,257
Net Book Value 969 1,020
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Gross Carrying Value 25,041 24,863
Accumulated Amortization 0 0
Net Book Value $ 25,041 $ 24,863