Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3.a.u2
Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Nov. 30, 2019
Aug. 31, 2019
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 113,736 $ 112,014
Gross Carrying Value 164,971 164,389
Net Book Value 51,235 52,375
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization 0 0
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 21,071 20,420
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 14 years  
Gross Carrying Value $ 127,242 126,229
Accumulated Amortization 99,191 96,817
Net Book Value $ 28,051 29,412
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 13,439 13,227
Accumulated Amortization 12,605 12,276
Net Book Value $ 834 951
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 12 years  
Gross Carrying Value $ 3,219 4,513
Accumulated Amortization 1,940 2,921
Net Book Value $ 1,279 $ 1,592