Goodwill and Intangible Assets (Details 2) (USD $)	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 109,572,000	$ 87,221,000
Finite-Lived Intangible Assets, Accumulated Amortization	(19,534,000)	(11,146,000)
Finite-Lived Intangible Assets, Net	90,038,000	76,075,000
Amortization of Intangible Assets	9,100,000	7,900,000	2,300,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years 3 months 18 days
2013	9,190,000
2014	8,553,000
2015	8,095,000
2016	7,564,000
2017	7,177,000
Customer Related Intangibles [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	74,039,000	59,948,000
Finite-Lived Intangible Assets, Accumulated Amortization	(13,263,000)	(7,428,000)
Finite-Lived Intangible Assets, Net	60,776,000	52,520,000
Developed Technology [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	19,189,000	13,522,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,258,000)	(2,273,000)
Finite-Lived Intangible Assets, Net	15,931,000	11,249,000
Trademarks and Tradenames [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	16,344,000	13,751,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,013,000)	(1,445,000)
Finite-Lived Intangible Assets, Net	$ 13,331,000	$ 12,306,000