Condensed 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
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net earnings	$ 12,927	$ 16,499	$ 29,490	$ 40,183
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	33	29	97	85
Unrealized gain on cash flow hedges, net of tax		(4)		(4)
Foreign currency translation adjustment, net of hedging activities and tax	(2,638)	187	(10,909)	1,039
Total other comprehensive (loss) income, net of tax expense (benefit) of $136, $262, $1,873 and ($333)	(2,605)	212	(10,812)	1,120
Total comprehensive income	$ 10,322	$ 16,711	$ 18,678	$ 41,303