Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Consolidated Statements Of Comprehensive Income [Abstract]
Net earnings	$ 23,179	$ 20,267	$ 26,309
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	331	(258)	(26)
Foreign currency translation adjustment, net of hedging activities and tax	1,733	1,394	(13,081)
Total other comprehensive income (loss), net of tax (benefit) expense of ($582), $79, and $1,450	2,064	1,136	(13,107)
Total comprehensive income	$ 25,243	$ 21,403	$ 13,202