Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 10,379	$ 10,952	$ 15,299	$ 16,837
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	40	38	109	113
Foreign currency translation adjustment, net of hedging activities and tax	(3,705)	(476)	(2,925)	37
Total other comprehensive (loss) income, net of tax expense (benefit) of $347, ($722), $74 and ($69), respectively	(3,665)	(438)	(2,816)	150
Total comprehensive income	$ 6,714	$ 10,514	$ 12,483	$ 16,987