Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Accumulated Other Comprehensive Loss [Abstract]
Defined benefit pension plan, net of tax benefit of $1,362 and $1,451	$ (2,199)	$ (2,450)
Foreign currency translation, net of hedging activities, net of tax expense of $2,686 and $2,508	(15,889)	(9,658)
Total accumulated other comprehensive loss	$ (18,088)	$ (12,108)	$ (14,172)