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Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Income Taxes [Abstract]      
Current, Federal $ 10,813 $ 13,269 $ 12,302
Current, State 744 894 966
Current, Foreign 7,465 7,593 5,886
Total current 19,022 21,756 19,154
Deferred, United States 2,627 (1,100) (870)
Deferred, Foreign 43 (495) 19
Total deferred 2,670 (1,595) (851)
Provision for income taxes $ 21,692 $ 20,161 $ 18,303