Derivatives Narrative (Details) (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014 Level 2 Valuation:	Aug. 31, 2013 Level 2 Valuation:	Feb. 28, 2014 Cash Flow Hedging [Member]	Aug. 31, 2013 Cash Flow Hedging [Member]	Feb. 28, 2014 Fair Value Hedging [Member]	Aug. 31, 2013 Fair Value Hedging [Member]
Derivative [Line Items]
Foreign currency derivatives					$ 431,000	$ 143,000
Derivative, Notional Amount							4,900,000	9,700,000	150,500,000	383,600,000
Unrealized losses expected to be reclassified during next 12 months	(100,000)		(100,000)
Net foreign currency gain (loss)	$ (2,600,000)	$ (900,000)	$ (11,300,000)	$ (300,000)