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, 2014	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2014 Performance Awards [Member]	Aug. 31, 2013 Performance Awards [Member]	Aug. 31, 2012 Performance Awards [Member]	Aug. 31, 2014 Fully Vested Share Awards [Member]	Aug. 31, 2013 Fully Vested Share Awards [Member]	Aug. 31, 2012 Fully Vested Share Awards [Member]	Aug. 31, 2014 Unvested Share Awards [Member]	Aug. 31, 2013 Unvested Share Awards [Member]	Aug. 31, 2012 Unvested Share Awards [Member]	Aug. 31, 2014 Employee Stock Purchase Plan [Member]	Aug. 31, 2013 Employee Stock Purchase Plan [Member]	Aug. 31, 2012 Employee Stock Purchase Plan [Member]	Mar. 02, 2013 Management Stock Loans [Member]	Aug. 31, 2013 Management Stock Loans [Member]	Aug. 31, 2012 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 3,534	$ 3,589	$ 3,835	$ 2,716	$ 2,504	$ 3,188	$ 371	$ 112	$ 62	$ 334	$ 383	$ 340	$ 113	$ 92	$ 77	$ 500	$ 498	$ 168