Quarterly report pursuant to Section 13 or 15(d)

Derivatives Narrative (Details)

v3.8.0.1
Derivatives Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Aug. 31, 2017
Derivative [Line Items]      
Foreign Currency Contract, Asset, Fair Value Disclosure $ 100    
Foreign Currency Contracts, Liability, Fair Value Disclosure     $ (200)
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value 214 $ (1,491)  
Fair Value Hedging [Member]      
Derivative [Line Items]      
Derivative, Notional Amount $ 22,500   $ 22,000