Accounts Receivable (Activity In Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Accounts Receivable [Abstract]
Beginning balance	$ 1,333	$ 918	$ 982
Charged to costs and expenses	2,022	699	141
Deductions	(1,776)	(284)	(205)
Ending balance	$ 1,579	$ 1,333	$ 918