Grant Date Weighted-Average and Range Assumptions (Detail) (Stock Options And Stock Appreciation Rights)	12 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010
Stock Options And Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield		[1]		[1]	1.90%
Risk-free interest rate, minimum		[1]		[1]	0.10%
Risk-free interest rate, maximum		[1]		[1]	3.40%
Expected volatility		[1]		[1]	60.20%
Expected life		[1]		[1]	5 years 7 months 6 days

[1] The Company did not grant Options during fiscal years 2012 and 2011.