Goodwill and Other Intangible Assets, net (Details) (USD $)	3 Months Ended	12 Months Ended						0 Months Ended	12 Months Ended			0 Months Ended
	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2014 MRB	Aug. 31, 2013 MRB	Jul. 01, 2014 MRB	Jul. 01, 2014 MRB Goodwill Income Approach Valuation Technique	Aug. 31, 2014 APB	Aug. 31, 2013 APB	Jul. 01, 2014 APB	Jul. 01, 2014 APB Goodwill Income Approach Valuation Technique
Goodwill [Line Items]
Goodwill impairment charge	$ 321,000,000	$ 0	$ 321,000,000	$ 0		$ 321,000,000				$ 0
New Date of Annual Goodwill Impairment Test		July 1
Goodwill	327,264,000	325,903,000	327,264,000	635,491,000	146,108,000	147,213,000	147,000,000		179,795,000	180,051,000	180,000,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount								13.00%				17.00%
Weighted Average Cost of Capital								12.87%				11.19%
Weighted Average Cost of Capital, Market Risk Premium, Percent								1.00%
Fair Value Inputs, Terminal Growth Rate								2.00%				1.00%
Weighted Average Cost of Capital Sensitivity Analysis, Percent								1.00%				1.25%
Goodwill, Impaired, Accumulated Impairment Loss	321,000,000	321,000,000	321,000,000
Goodwill [Roll Forward]
Goodwill, beginning of period		327,264,000	635,491,000		147,213,000	471,954,000	147,000,000		180,051,000	163,537,000	180,000,000
Acquisitions		586,000	19,378,000		0	1,744,000			586,000	17,634,000
Purchase accounting adjustments		(51,000)	749,000		0	135,000			(51,000)	614,000
Foreign currency translation adjustment		(1,896,000)	(7,354,000)		(1,105,000)	(5,620,000)			(791,000)	(1,734,000)
Goodwill, impairment charges	(321,000,000)	0	(321,000,000)	0		(321,000,000)				0
Goodwill, end of period	$ 327,264,000	$ 325,903,000	$ 327,264,000	$ 635,491,000	$ 146,108,000	$ 147,213,000	$ 147,000,000		$ 179,795,000	$ 180,051,000	$ 180,000,000