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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Income Taxes [Abstract]      
Amount computed at U.S. statutory federal tax rate $ 25,476 $ 22,088 $ 22,036
State income taxes, net of federal tax benefits 397 578 674
Effect of foreign operations (4,382) (3,221) (2,270)
Benefit from qualified domestic production deduction (1,190) (1,131) (1,048)
Other (140) (11) (179)
Provision for income taxes $ 20,161 $ 18,303 $ 19,213