Annual report pursuant to Section 13 and 15(d)

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

v3.19.3
Gross Carrying Value and Accumulated Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Indefinite And Finite Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 169,224 $ 175,240
Finite-Lived Accumulated Amortization 116,849 103,583
Net Book Value 52,375 71,657
Trade Names    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 20,420 24,138
Finite-Lived Accumulated Amortization 0 0
Net Book Value 20,420 24,138
Customer Relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 126,229 128,561
Finite-Lived Accumulated Amortization 96,817 84,029
Net Book Value $ 29,412 44,532
Weighted Average Amortization Period 14 years  
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 13,227 13,324
Finite-Lived Accumulated Amortization 12,276 11,915
Net Book Value $ 951 1,409
Weighted Average Amortization Period 12 years  
Trademarks and Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 4,513 4,275
Finite-Lived Accumulated Amortization 2,921 2,826
Net Book Value $ 1,592 1,449
Weighted Average Amortization Period 16 years  
Non-Compete Agreements and Other    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 4,835 4,942
Finite-Lived Accumulated Amortization 4,835 4,813
Net Book Value $ 0 $ 129
Weighted Average Amortization Period 3 years