Income Taxes (Schedule Of Significant ComponentsOf Income Tax Provision)(Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Income Taxes [Abstract]
Federal, Current	$ 21,694	$ 18,705	$ 11,077
State, Current	1,026	1,309	770
Foreign, Current	2,979	2,526	1,573
Total Current	25,699	22,540	13,420
Deferred Federal Income Tax Expense (Benefit)	(3,829)	(1,484)	501
Deferred State and Local Income Tax Expense (Benefit)	614	(29)	(1,364)
Deferred Foreign Income Tax Expense (Benefit)	(653)	(1,315)	(637)
Total Deferred	(3,868)	(2,828)	(1,500)
Income tax provision	$ 21,831	$ 19,712	$ 11,920