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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Income Taxes [Abstract]      
Amount computed at U.S. statutory federal tax rate $ 22,036 $ 19,904 $ 17,820
State income taxes, net of federal tax benefits 674 661 (16)
Effect of foreign operations (2,270) (2,353) (1,377)
Benefit from qualified domestic production deduction (1,048) (1,050) (951)
Other (179) (108) (48)
Income Tax Expense (Benefit), Total $ 19,213 $ 17,054 $ 15,428