Share-Based Compensation Plans (Total Cost Of Share-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended						3 Months Ended	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2013 Performance Awards [Member]	Aug. 31, 2012 Performance Awards [Member]	Aug. 31, 2011 Performance Awards [Member]	Mar. 02, 2013 Management Stock Loans [Member]	Aug. 31, 2013 Management Stock Loans [Member]	Aug. 31, 2013 Unvested Share Awards [Member]	Aug. 31, 2012 Unvested Share Awards [Member]	Aug. 31, 2011 Unvested Share Awards [Member]	Aug. 31, 2012 Stock Options [Member]	Aug. 31, 2011 Stock Options [Member]	Aug. 31, 2013 Fully Vested Share Awards [Member]	Aug. 31, 2012 Fully Vested Share Awards [Member]	Aug. 31, 2011 Fully Vested Share Awards [Member]	Aug. 31, 2013 Compensation Cost Of The ESPP [Member]	Aug. 31, 2012 Compensation Cost Of The ESPP [Member]	Aug. 31, 2011 Compensation Cost Of The ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 3,589	$ 3,835	$ 2,788	$ 2,504	$ 3,188	$ 827	$ 500	$ 498	$ 383	$ 340	$ 411	$ 168	$ 820	$ 112	$ 62	$ 669	$ 92	$ 77	$ 61