Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
May 31, 2019
Aug. 31, 2018
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 183,968 $ 193,941
Gross Carrying Value 342,150 374,978
Net Book Value 158,182 181,037
Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Accumulated Amortization 0 0
Net Book Value 86,689 87,253
Gross Carrying Value $ 86,689 87,253
Customer relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 15 years  
Gross Carrying Value $ 217,539 230,601
Accumulated Amortization 149,742 147,451
Net Book Value $ 67,797 83,150
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 11 years  
Gross Carrying Value $ 25,097 30,355
Accumulated Amortization 23,371 25,327
Net Book Value $ 1,726 5,028
Trademarks and tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 14 years  
Gross Carrying Value $ 7,254 20,823
Accumulated Amortization 5,284 15,347
Net Book Value $ 1,970 5,476
Other intangibles    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 3 years  
Gross Carrying Value $ 5,571 5,946
Accumulated Amortization 5,571 5,816
Net Book Value $ 0 $ 130