Derivatives Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015	Aug. 31, 2015
Derivative [Line Items]
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value	$ (394)	$ 2,310	$ (1,028)	$ 304
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 80,500		$ 80,500		$ 170,700