CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 64,734	$ 78,390	$ 211,880	$ 111,982
Other comprehensive income, net of income taxes:
Foreign currency translation adjustment	(8,037)	(5,135)	(2,179)	(14,278)
Reclassification for translation loss realized upon liquidation of investment in foreign entity	2	19	0	856
Foreign currency translation adjustment	(8,035)	(5,116)	(2,179)	(13,422)
Net unrealized gain (loss) on derivatives:
Unrealized holding gain (loss)	(5,143)	(145)	(8,075)	(267)
Reclassification for loss included in net earnings	(81)	(71)	(253)	(154)
Net unrealized gain (loss) on derivatives	(5,224)	(216)	(8,328)	(421)
Defined benefit obligation:
Amortization of prior services	(8)	(6)	(24)	(21)
Reclassification for settlement losses	0	0	0	1,316
Defined benefit obligation	(8)	(6)	(24)	1,295
Other comprehensive income (loss)	(13,267)	(5,338)	(10,531)	(12,548)
Comprehensive income	$ 51,467	$ 73,052	$ 201,349	$ 99,434