Debt (Details) (USD $)			2 Months Ended	12 Months Ended		12 Months Ended				2 Months Ended					12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Oct. 21, 2013 Revolving Credit Facility [Member]	Aug. 31, 2014 Revolving Credit Facility [Member]	Aug. 31, 2013 Revolving Credit Facility [Member]	Aug. 31, 2014 Revolving Credit Facility [Member] Minimum [Member]	Aug. 31, 2014 Revolving Credit Facility [Member] Minimum [Member] London Interbank Offered Rate (LIBOR) [Member]	Aug. 31, 2014 Revolving Credit Facility [Member] Maximum [Member]	Aug. 31, 2014 Revolving Credit Facility [Member] Maximum [Member] London Interbank Offered Rate (LIBOR) [Member]	Oct. 20, 2014 Revolving Credit Facility [Member] Subsequent Event [Member]	Aug. 31, 2014 Capital lease obligations [Member]	Aug. 31, 2013 Capital lease obligations [Member]	Aug. 31, 2014 Other [Member]	Aug. 31, 2013 Other [Member]	Aug. 31, 2014 Technology Purchase Obligation [Member]
Debt [Line Items]
Total debt	$ 657,096,000	$ 692,054,000		$ 585,000,000	$ 605,000,000						$ 32,806,000	$ 49,628,000	$ 39,290,000	$ 37,426,000
Less short-term borrowings and current portion of long-term debt	(609,506,000)	(628,050,000)
Long-term debt	47,590,000	64,004,000
Aggregate debt maturities [Abstract]
2015	609,506,000
2016	28,080,000
2017	6,430,000
2018	3,684,000
2019	3,551,000
Thereafter	5,845,000
Total debt	657,096,000	692,054,000		585,000,000	605,000,000						32,806,000	49,628,000	39,290,000	37,426,000
Borrowing capacity				625,000,000
Debt term				5 years											10 years
Letters of credit outstanding	24,000,000	14,000,000
Debt repaid			$ 605,000,000							$ 585,000,000
Fees						0.25%		0.40%
Fees for borrowings							1.25%		1.85%
Weighted average interest rate				3.50%	3.50%								5.80%	5.30%