Stockholders’ Equity (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Aug. 31, 2013
Stockholders’ Equity [Abstract]
Options, Outstanding at September 1, 2012	7,258
Options, Granted	729
Options, Exercised	(1,527)
Options, Forfeited or expired	(898)
Options, Outstanding at August 31, 2013	5,562
Options, Exercisable at August 31, 2013	4,138
Weighted Average Exercise Price, Outstanding at September 1, 2012	$ 12.41
Weighted Average Exercise Price, Granted	$ 11.28
Weighted Average Exercise Price, Exercised	$ 10.71
Weighted Average Exercise Price, Forfeited or expired	$ 15.42
Weighted Average Exercise Price, Outstanding at August 31, 2013	$ 12.25
Weighted Average Exercise Price, Exercisable at August 31, 2013	$ 13.22
Weighted Average Remaining Contractual Life, Outstanding at August 31, 2013	3 years 3 months 15 days
Weighted Average Remaining Contractual Life, Exercisable at August 31, 2013	2 years 5 months 5 days
Aggregate Intrinsic Value, Outstanding at August 31, 2013	$ 26,239
Aggregate Intrinsic Value, Exercisable at August 31, 2013	$ 16,936