Derivative Instruments - Derivatives in Cash Flow Hedging Relationships (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss Reclassified from AOCL into Income	$ (281)		$ 2,484
Cash flow hedging | Designated as hedging instrument | Foreign exchange contract | SG&A
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Loss) Gain Recognized in AOCL on Derivatives	(630)	$ 321	1,402	$ 2,264
Loss Reclassified from AOCL into Income	$ (349)	$ (385)	$ (1,082)	$ (784)