Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended
May 31, 2021
Aug. 31, 2020
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 130,050 $ 121,976
Gross Carrying Value 187,676 184,358
Net Book Value $ 57,626 62,382
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 14 years  
Gross Carrying Value $ 144,336 141,853
Accumulated Amortization 113,848 106,491
Net Book Value $ 30,488 35,362
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 14,645 14,365
Accumulated Amortization 13,793 13,228
Net Book Value $ 852 1,137
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 3,360 3,277
Accumulated Amortization 2,409 2,257
Net Book Value 951 1,020
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Gross Carrying Value 25,335 24,863
Accumulated Amortization 0 0
Net Book Value $ 25,335 $ 24,863