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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net earnings	$ 13,450	$ 19,351	$ 23,684	$ 34,079
Other comprehensive income (loss):
Defined benefit pension plan adjustment, net of tax	28	33	56	66
Unrealized gain on cash flow hedges, net of tax		(35)		(9)
Foreign currency translation adjustment, net of hedging activities and tax	(25)	1,148	852	1,107
Total other comprehensive income, net of tax (benefit) expense of ($237), $275, ($595) and ($118)	3	1,146	908	1,164
Total comprehensive income	$ 13,453	$ 20,497	$ 24,592	$ 35,243

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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