Fair Value Of Financial Instruments (Schedule Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	$ 4,548
Change in Fair Value	24	$ 176
Payments	(217)
Contingent consideration liability at end of quarter	4,355
Robert Gregory Partners, LLC [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	606
Change in Fair Value	(22)
Payments
Contingent consideration liability at end of quarter	584
Jhana Education [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	3,942
Change in Fair Value	46
Payments	(217)
Contingent consideration liability at end of quarter	$ 3,771