Business Acquisitions (Schedule Of Estimated Fair Values Of Assets Acquired, Liabilities Assumed, and Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017	Jul. 11, 2017	May 15, 2017	Aug. 31, 2016
Business Acquisition, Contingent Consideration [Line Items]
Goodwill	$ 24,220	$ 24,220			$ 19,903
Robert Gregory Partners [Member]
Business Acquisition, Contingent Consideration [Line Items]
Accounts receivable				$ 458
Prepaid expenses				136
Intangible assets				3,811
Goodwill				1,232
Assets acquired				5,637
Accounts payable				(51)
Accrued liabilities				(80)
Deferred revenue				(593)
Liabilities assumed				(724)
Purchase price				$ 4,913
Jhana Education [Member]
Business Acquisition, Contingent Consideration [Line Items]
Cash			$ 253
Accounts receivable			195
Prepaid expenses			86
Deferred tax asset			3,138
Intangible assets			6,076
Goodwill			3,085
Assets acquired			12,833
Accounts payable			(185)
Accrued liabilities			(19)
Deferred tax liability			(2,257)
Deferred revenue			(795)
Liabilities assumed			(3,256)
Purchase price			$ 9,577