CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 10,502	$ 6,197	$ 35,565	$ 38,381
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustment and other	4,211	(43,979)	(17,784)	(71,263)
Net unrealized gain (loss) on derivatives:
Unrealized holding gain (loss), net of income taxes of $221, $(839), $74 and $(1,123)	494	(1,900)	485	(2,425)
Reclassification for loss (gain) included in net earnings, net of income taxes of $(28), $391, $(77) and $417	(56)	727	(174)	766
Net unrealized gain (loss) on derivatives, net of income taxes of $193, $(448), $(3) and $(706)	438	(1,173)	311	(1,659)
Defined benefit obligation:
Net gain, net of income taxes of $0, $0, $0 and $4	0	0	0	8
Amortization of prior services, net of income taxes of $0, $(2), $(1) and $(1)	(2)	(2)	(3)	(6)
Defined benefit obligation, net of income taxes of $0, $(2), $(1) and $3	(2)	(2)	(3)	2
Other comprehensive income (loss)	4,647	(45,154)	(17,476)	(72,920)
Comprehensive income (loss)	$ 15,149	$ (38,957)	$ 18,089	$ (34,539)