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 6 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Aug. 31, 2017
Derivative [Line Items]          
Foreign Currency Contracts, Liability, Fair Value Disclosure $ (100)   $ (100)   $ (200)
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value (74) $ (474) 140 $ (1,966)  
Fair Value Hedging [Member]          
Derivative [Line Items]          
Derivative, Notional Amount $ 26,500   $ 26,500   $ 22,000