Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Additional Information (Details)

v3.3.1.900
Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Aug. 31, 2015
Impaired Assets [Line Items]          
Goodwill impairment charge $ 118,122 $ 77,992 $ (118,462)    
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 16,653        
Impairment of Intangible Assets, Finite-lived 27,952        
Tangible Asset Impairment Charges 23,784        
Impairment charges 186,511 84,353 186,511 $ 84,353  
Goodwill 486,353   486,353   $ 608,256
Future Amortization Expense, Remainder of 2016 10,500   10,500    
Future Amortization Expense, 2017 19,900   19,900    
Future Amortization Expense, 2018 19,600   19,600    
Future Amortization Expense, 2019 19,400   19,400    
Future Amortization Expense, 2020 18,800   18,800    
Future Amortization Expense, 2021 17,700   17,700    
Future Amortization Expense, Thereafter 49,600   49,600    
Tradenames          
Impaired Assets [Line Items]          
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   6,362      
Energy          
Impaired Assets [Line Items]          
Goodwill impairment charge     (73,919)    
Impairment charges 140,837 $ 84,353      
Goodwill 154,647   154,647   $ 236,450
Viking          
Impaired Assets [Line Items]          
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        
Impairment charges 104,124        
Goodwill 0   0    
Cortland          
Impaired Assets [Line Items]          
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        
Impairment charges 36,713        
Goodwill 37,100   37,100    
maximatecc          
Impaired Assets [Line Items]          
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        
Impairment charges 45,674        
Goodwill $ 18,000   $ 18,000