Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 7,095	$ 8,345
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	43	43
Foreign currency translation adjustment, net of hedging activities and tax	1,384	(293)
Unrealized loss on marketable securities, net of tax	(32)	0
Total other comprehensive income (loss), net of tax (benefit) expense of ($32), and $76, respectively	1,395	(250)
Total comprehensive income	$ 8,490	$ 8,095