Derivatives Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Aug. 31, 2014
Derivative [Line Items]
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value	$ 2,310	$ (2,141)	$ 304	$ (13,452)
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 186,400		$ 186,400		$ 219,900