Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Additional Information (Details)

v3.8.0.1
Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
Feb. 28, 2018
Aug. 31, 2017
Impaired Assets [Line Items]    
Goodwill $ 546,135 $ 530,081
Future Amortization Expense, Remainder of 2018 10,400  
Future Amortization Expense, 2019 20,200  
Future Amortization Expense, 2020 19,500  
Future Amortization Expense, 2021 18,600  
Future Amortization Expense, 2022 16,600  
Future Amortization Expense, 2023 13,600  
Future Amortization Expense, Thereafter $ 22,900