Derivatives Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Aug. 31, 2019
Derivative [Line Items]
Foreign Currency Contract, Liability/Asset, Fair Value Disclosure	$ (100)		$ (100)		$ (100)
Loss on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value	(842)	$ (114)	(1,393)	$ (115)
Gain on Derivative Used in Net Investment Hedge, after Tax	800		500
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	33,200		33,200		$ 13,300
Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 31,600		$ 31,600