Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Additional Information (Details)

v3.7.0.1
Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2017
Feb. 29, 2016
Aug. 31, 2016
Impaired Assets [Line Items]          
Goodwill, Impairment Loss       $ 118,122  
Goodwill $ 509,078   $ 509,078   $ 519,276
Asset Impairment Charges 0 $ 186,511 0 186,511  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       16,653  
Impairment of Intangible Assets, Finite-lived       27,952  
Tangible Asset Impairment Charges       23,784  
Future Amortization Expense, Remainder of 2017 10,000   10,000    
Future Amortization Expense, 2018 19,900   19,900    
Future Amortization Expense, 2019 19,300   19,300    
Future Amortization Expense, 2020 18,700   18,700    
Future Amortization Expense, 2021 17,800   17,800    
Future Amortization Expense, 2022 15,800   15,800    
Future Amortization Expense, Thereafter 34,400   34,400    
Energy          
Impaired Assets [Line Items]          
Goodwill 184,694   184,694   187,321
Asset Impairment Charges   140,900   140,900  
Engineered Solutions          
Impaired Assets [Line Items]          
Goodwill $ 224,516   $ 224,516   $ 230,216
Asset Impairment Charges   $ 45,700   45,700  
Cortland [Domain]          
Impaired Assets [Line Items]          
Goodwill, Impairment Loss       34,502  
Asset Impairment Charges       36,713  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       2,211  
Impairment of Intangible Assets, Finite-lived       0  
Tangible Asset Impairment Charges       0  
Viking [Domain]          
Impaired Assets [Line Items]          
Goodwill, Impairment Loss       39,099  
Asset Impairment Charges       104,124  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       13,289  
Impairment of Intangible Assets, Finite-lived       27,952  
Tangible Asset Impairment Charges       23,784  
maximatecc [Domain]          
Impaired Assets [Line Items]          
Goodwill, Impairment Loss       44,521  
Asset Impairment Charges       45,674  
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       1,153  
Impairment of Intangible Assets, Finite-lived       0  
Tangible Asset Impairment Charges       $ 0