Derivative Financial Instruments and Hedging Activities (Fair Value of Derivative Instruments Recorded on Consolidated Statements of Operations) (Details) - Cost of revenue - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency gain (loss)	$ 36,900	$ 28,300	$ 400	$ (24,300)
Forward foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Net Income on Derivatives	$ (36,955)	$ (33,476)	$ (3,436)	$ 9,332