Income Taxes (Significant Components Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Income Taxes [Abstract]
Sale and financing of corporate headquarters	$ 10,289	$ 10,953
Foreign income tax credit carryforward	5,423	6,205
Deferred compensation	2,405	2,296
Bonus and other accruals	1,430	1,399
Unearned revenue	2,257	1,188
Inventory and bad debt reserves	731	746
Other	1,089	1,372
Total deferred income tax assets	23,624	24,159
Net deferred income tax assets	23,624	24,159
Intangible step-ups indefinite lived	(8,418)	(8,667)
Intangible step-ups definite lived	(7,580)	(8,371)
Property and equipment depreciation	(4,290)	(4,822)
Intangible asset impairment and amortization	(4,614)	(4,919)
Unremitted earnings of foreign subsidiaries	(428)	(582)
Other	(63)	(142)
Total deferred income tax liabilities	(25,393)	(27,503)
Net deferred income taxes	$ (1,769)	$ (3,344)