Accrued Expenses and Other - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Workers' Compensation and Property [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.5
Employee Health [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	0.5
General, Products Liability, and Vehicle [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.0