Annual report pursuant to Section 13 and 15(d)

Derivatives - Additional Information (Details)

v3.5.0.2
Derivatives - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Derivative [Line Items]      
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value $ (1,520) $ (95) $ (13,500)
Fair Value, Inputs, Level 2      
Derivative [Line Items]      
Foreign Currency Contracts Net Assets (Liabilities) Fair Value Disclosure (680) (234)  
Cash Flow Hedging [Member]      
Derivative [Line Items]      
Derivative, Notional Amount   500  
Fair Value Hedging [Member]      
Derivative [Line Items]      
Derivative, Notional Amount $ 143,400 $ 170,700