Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Additional Information (Details)

v3.10.0.1
Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2018
Aug. 31, 2016
Goodwill [Line Items]    
Impairment charge   $ 186,511
Goodwill, Impairment Charge $ 21,227 118,122
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 6,710 16,653
Impairment of Intangible Assets, Finite-lived 5,076 27,952
Tangible Asset Impairment Charges 1,207 23,784
Future amortization expense, 2019 17,200  
Future amortization expense, 2020 16,600  
Future amortization expense, 2021 15,700  
Future amortization expense, 2022 13,700  
Future amortization expense, 2023 10,600  
Future amortization expense, thereafter 20,000  
Viking and Cortland [Member]    
Goodwill [Line Items]    
Impairment charge   140,837
Precision-Hayes International [Member]    
Goodwill [Line Items]    
Impairment charge 23,740  
Goodwill, Impairment Charge 17,457  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 0  
Impairment of Intangible Assets, Finite-lived 5,076  
Tangible Asset Impairment Charges 1,207  
maximatecc    
Goodwill [Line Items]    
Impairment charge   45,674
Goodwill, Impairment Charge   44,521
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   1,153
Impairment of Intangible Assets, Finite-lived   0
Tangible Asset Impairment Charges   0
Viking [Member]    
Goodwill [Line Items]    
Impairment charge   104,124
Goodwill, Impairment Charge   39,099
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   13,289
Impairment of Intangible Assets, Finite-lived   27,952
Tangible Asset Impairment Charges   23,784
Cortland    
Goodwill [Line Items]    
Impairment charge   36,713
Goodwill, Impairment Charge   34,502
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   2,211
Impairment of Intangible Assets, Finite-lived   0
Tangible Asset Impairment Charges   $ 0
Cortland Fibron and Precision Hayes [Member]    
Goodwill [Line Items]    
Impairment charge 34,220  
Cortland Fibron [Member]    
Goodwill [Line Items]    
Impairment charge 10,480  
Goodwill, Impairment Charge 3,770  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 6,710  
Impairment of Intangible Assets, Finite-lived 0  
Tangible Asset Impairment Charges $ 0