Postretirement And Other Employee Benefits (Estimated Amount That Will Be Amortized From Accumulated Other Comprehensive Loss Into Net Periodic Benefit Cost) (Details) (August 31, 2012, Forecast [Member], USD $) In Thousands	12 Months Ended
	Aug. 31, 2011
August 31, 2012, Forecast [Member]
Recognized net actuarial loss	$ 1,259
Amortization of prior service cost	(28)
Total	$ 1,231