Stockholders’ Equity (Summary Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Aug. 31, 2015 USD ($) $ / shares shares
Stockholders’ Equity [Abstract]
Options, Outstanding at September 1, 2014	4,160
Options, Granted	424
Options, Exercised	(1,519)
Options, Forfeited or expired	(192)
Options, Outstanding at August 31, 2015	2,873
Options, Exercisable at August 31, 2015	2,119
Weighted Average Exercise Price, Outstanding at September 1, 2014 | $ / shares	$ 12.73
Weighted Average Exercise Price, Granted | $ / shares	31.08
Weighted Average Exercise Price, Exercised | $ / shares	14.56
Weighted Average Exercise Price, Forfeited or expired | $ / shares	19.77
Weighted Averae Exercise Price, Outstanding at August 31, 2015 | $ / shares	14.00
Weighted Average Exercise Price, Exercisable at August 31, 2015 | $ / shares	$ 10.46
Weighted Average Remaining Contractual Life, Outstanding at August 31, 2015	3 years 4 months 17 days
Weighted Average Remaining Contractual Life, Exercisable at August 31, 2015	2 years 6 months 18 days
Aggregate Intrinsic Value, Outstanding at August 31, 2015 | $	$ 38,892
Aggregate Intrinsic Value, Exercisable at August 31, 2015 | $	$ 35,035