Goodwill and Intangible Assets (Details 2) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 120,761,000	$ 109,572,000
Finite-Lived Intangible Assets, Accumulated Amortization	(28,874,000)	(19,534,000)
Finite-Lived Intangible Assets, Net	91,887,000	90,038,000
Amortization of Intangible Assets	10,300,000	8,700,000	7,500,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years 5 months 6 days
2014	9,327,000
2015	8,920,000
2016	8,470,000
2017	8,097,000
2018	7,781,000
Customer-Related Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	85,129,000	74,039,000
Finite-Lived Intangible Assets, Accumulated Amortization	(19,605,000)	(13,263,000)
Finite-Lived Intangible Assets, Net	65,524,000	60,776,000
Developed Technology [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	19,641,000	19,189,000
Finite-Lived Intangible Assets, Accumulated Amortization	(5,156,000)	(3,258,000)
Finite-Lived Intangible Assets, Net	14,485,000	15,931,000
Trademarks and Tradenames [Member]
Acquired Finite-Lived Intangible Assets
Finite-Lived Intangible Assets, Gross	15,991,000	16,344,000
Finite-Lived Intangible Assets, Accumulated Amortization	(4,113,000)	(3,013,000)
Finite-Lived Intangible Assets, Net	$ 11,878,000	$ 13,331,000