Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.8.0.1
Fair Value Measurements - Additional Information (Detail) - USD ($)
$ in Thousands
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Apr. 16, 2012
5.625% Senior Notes | Senior Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument, interest rate 5.625% 5.625% 5.625% 5.625%
Fair value of long-term debt $ 295,800 $ 299,600    
5.625% Senior Notes Carrying Value 287,559 288,059    
Fair Value, Inputs, Level 2        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Foreign Currency Contracts Net Assets (Liabilities) Fair Value Disclosure $ (200) $ (700)