Annual report pursuant to Section 13 and 15(d)

Gross Carrying Value and Accumulated Amortization of Intangible Assets (Details)

v3.20.2
Gross Carrying Value and Accumulated Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Accumulated Amortization $ 121,976 $ 112,014
Net Book Value 62,382 52,375
Intangible assets, gross 184,358 164,389
Trade Names    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 24,863 20,420
Finite-Lived Accumulated Amortization 0 0
Net Book Value 24,863 20,420
Customer Relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 141,853 126,229
Finite-Lived Accumulated Amortization 106,491 96,817
Net Book Value $ 35,362 29,412
Weighted Average Amortization Period 14 years  
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 14,365 13,227
Finite-Lived Accumulated Amortization 13,228 12,276
Net Book Value $ 1,137 951
Weighted Average Amortization Period 12 years  
Trademarks and Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 3,277 4,513
Finite-Lived Accumulated Amortization 2,257 2,921
Net Book Value $ 1,020 $ 1,592
Weighted Average Amortization Period 12 years