Fair Value Of Financial Instruments (Schedule Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Nov. 30, 2017	Nov. 26, 2016	Aug. 31, 2017
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	$ 6,965
Increases in Fair Value	176	$ (1,013)	$ 176
Payments/Decreases			(1,109)
Contingent consideration liability at end of quarter	6,032		6,965
Robert Gregory Partners, LLC [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	913
Increases in Fair Value
Payments/Decreases
Contingent consideration liability at end of quarter	913		913
Jhana Education [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration liability at beginning of year	6,052
Increases in Fair Value			176
Payments/Decreases			(1,109)
Contingent consideration liability at end of quarter	$ 5,119		$ 6,052