Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 2,172	$ 20,277	$ 23,179
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	(192)	251	331
Foreign currency translation adjustment, net of hedging activities and tax	(1,042)	(6,231)	1,733
Total other comprehensive (loss) income, net of tax expense (benefit) of $467, $267, and ($582)	(1,234)	(5,980)	2,064
Total comprehensive income	$ 938	$ 14,297	$ 25,243