Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net earnings	$ 10,234	$ 14,728
Defined benefit pension plan adjustment, net of tax	28	33
Unrealized gain on cash flow hedges, net of tax		26
Foreign currency translation adjustment, net of hedging activities and tax	877	(41)
Total other comprehensive income, net of tax (benefit) of ($357) and ($393)	905	18
Total comprehensive income	$ 11,139	$ 14,746