Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense, Net	$ 27,000,000	$ 28,000,000	$ 28,000,000
Future minimum obligations under non-cancelable operating leases:
2015	22,065,000
2016	17,586,000
2017	15,235,000
2018	12,051,000
2019	9,220,000
Thereafter	35,371,000
Total	$ 111,528,000