Fair Value Of Financial Instruments (Schedule Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	$ 5,229
Change in Fair Value	91	$ 24
Payments	(782)
Contingent consideration liability at end of quarter	4,538
Robert Gregory Partners [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	1,761
Change in Fair Value	(7)
Payments	(500)
Contingent consideration liability at end of quarter	1,254
Jhana Education [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	3,468
Change in Fair Value	98
Payments	(282)
Contingent consideration liability at end of quarter	$ 3,284