Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 28, 2019
Aug. 31, 2018
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 156,034 $ 193,941
Gross Carrying Value 306,069 374,978
Net Book Value 150,035 181,037
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization 0 0
Net Book Value 84,054 87,253
Gross Carrying Value $ 84,054 87,253
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 15 years  
Gross Carrying Value $ 188,974 230,601
Accumulated Amortization 126,738 147,451
Net Book Value $ 62,236 83,150
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 11 years  
Gross Carrying Value $ 20,946 30,355
Accumulated Amortization 19,041 25,327
Net Book Value $ 1,905 5,028
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 15 years  
Gross Carrying Value $ 6,904 20,823
Accumulated Amortization 5,083 15,347
Net Book Value $ 1,821 5,476
Other intangibles    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 3 years  
Gross Carrying Value $ 5,191 5,946
Accumulated Amortization 5,172 5,816
Net Book Value $ 19 $ 130