CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 25,063	$ 32,184
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustment and other	(21,995)	(27,284)
Net unrealized gain (loss) on derivatives:
Unrealized holding loss, net of income taxes of $(147) and $(284)	(9)	(525)
Reclassification for loss (gain) included in net earnings, net of income taxes of $(49) and $26	(118)	39
Net unrealized loss on derivatives, net of income taxes of $(196) and $(258)	(127)	(486)
Defined benefit obligation:
Net gain, net of income taxes of $0 and $4	0	8
Amortization of prior services, net of income taxes of $(1) and $1	(1)	(4)
Defined benefit obligation, net of income taxes of $(1) and $5	(1)	4
Other comprehensive loss	(22,123)	(27,766)
Comprehensive income	$ 2,940	$ 4,418