Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 29, 2020
Aug. 31, 2019
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 115,637 $ 112,014
Gross Carrying Value 182,138 164,389
Net Book Value 66,501 52,375
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization 0 0
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 24,629 20,420
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 14 years  
Gross Carrying Value $ 140,239 126,229
Accumulated Amortization 100,895 96,817
Net Book Value $ 39,344 29,412
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 14,068 13,227
Accumulated Amortization 12,723 12,276
Net Book Value $ 1,345 951
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 3,202 4,513
Accumulated Amortization 2,019 2,921
Net Book Value $ 1,183 $ 1,592