Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Gross Carrying Value and Accumulated Amortization of Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Accumulated Amortization $ 192,660 $ 202,311
Net Book Value 220,489 239,475
Intangible assets, gross 413,149 441,786
Trade Names    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 91,080 90,909
Finite-Lived Accumulated Amortization 0 0
Net Book Value 91,080 90,909
Customer Relationships    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 263,498 292,671
Finite-Lived Accumulated Amortization 153,003 166,252
Net Book Value $ 110,495 126,419
Weighted Average Amortization Period 15 years  
Patents    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 30,401 30,296
Finite-Lived Accumulated Amortization 24,027 22,233
Net Book Value $ 6,374 8,063
Weighted Average Amortization Period 10 years  
Trademarks and Tradenames    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 21,498 21,283
Finite-Lived Accumulated Amortization 9,396 7,936
Net Book Value $ 12,102 13,347
Weighted Average Amortization Period 18 years  
Non-Compete Agreements and Other    
Indefinite And Finite Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 6,672 6,627
Finite-Lived Accumulated Amortization 6,234 5,890
Net Book Value $ 438 $ 737
Weighted Average Amortization Period 3 years