Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Additional Information (Details)

v3.8.0.1
Fair Value Measurement - Additional Information (Details) - USD ($)
$ in Millions
Nov. 30, 2017
Aug. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign Currency Contract, Asset, Fair Value Disclosure $ 0.1  
Foreign Currency Contracts, Liability, Fair Value Disclosure   $ 0.2
Senior Notes | 5.625% Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of long-term debt $ 295.1 $ 295.8