CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 56,681	$ 23,563	$ 147,385	$ 80,626
Other comprehensive income (loss), net of income taxes:
Foreign currency translation adjustment and other	(4,588)	655	(75,851)	28,840
Net unrealized gain (loss) on derivatives:
Unrealized holding gain (loss), net of income taxes of $(55), $110, $(1,178) and $(434)	54	390	(2,371)	(1,653)
Reclassification for loss (gain) included in net earnings, net of income taxes of $469, $(50), $886 and $258	804	(103)	1,570	1,259
Net unrealized gain (loss) on derivatives, net of income taxes of $414, $60, $(292) and $(176)	858	287	(801)	(394)
Defined benefit obligation:
Net gain, net of income taxes of $0, $0, $4 and $296	0	0	8	550
Amortization of prior services, net of income taxes of $(1), $(1), $(2) and $(2)	(3)	(2)	(9)	(6)
Defined benefit obligation, net of income taxes of $(1), $(1), $2 and $294	(3)	(2)	(1)	544
Other comprehensive income (loss)	(3,733)	940	(76,653)	28,990
Comprehensive income	$ 52,948	$ 24,503	$ 70,732	$ 109,616