Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	May. 31, 2015	Aug. 31, 2014
Goodwill [Line Items]
Gross, Beginning balance	$ 1,403,466
Accumulated Impairment, Beginning balance	(1,019,822)
Acquisitions & Adjustments	28,738
Foreign Currency Impact	(3,566)
Gross, Ending balance	1,428,638
Accumulated Impairment, Ending balance	(1,019,822)
Net Balance	408,816	$ 383,644
EMS
Goodwill [Line Items]
Gross, Beginning balance	474,305
Accumulated Impairment, Beginning balance	(464,053)
Acquisitions & Adjustments	18,691
Foreign Currency Impact	(1,085)
Gross, Ending balance	491,911
Accumulated Impairment, Ending balance	(464,053)
Net Balance	27,858
DMS
Goodwill [Line Items]
Gross, Beginning balance	929,161
Accumulated Impairment, Beginning balance	(555,769)
Acquisitions & Adjustments	10,047
Foreign Currency Impact	(2,481)
Gross, Ending balance	936,727
Accumulated Impairment, Ending balance	(555,769)
Net Balance	$ 380,958