Stockholders’ Equity (Deficit) (Summary Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Aug. 31, 2016 USD ($) $ / shares shares
Stockholders’ Equity [Abstract]
Options, Outstanding at September 1, 2015 | shares	2,873
Options, Granted | shares	494
Options, Exercised | shares	(976)
Options, Forfeited or expired | shares	(57)
Options, Outstanding at August 31, 2016 | shares	2,334
Options, Exercisable at August 31, 2016 | shares	1,548
Weighted Average Exercise Price, Outstanding at September 1, 2015 | $ / shares	$ 14.00
Weighted Average Exercise Price, Granted | $ / shares	29.28
Weighted Average Exercise Price, Exercised | $ / shares	10.49
Weighted Average Exercise Price, Forfeited or expired | $ / shares	27.51
Weighted Averae Exercise Price, Outstanding at August 31, 2016 | $ / shares	18.37
Weighted Average Exercise Price, Exercisable at August 31, 2016 | $ / shares	$ 13.23
Weighted Average Remaining Contractual Life, Outstanding at August 31, 2016	3 years 10 months 24 days
Weighted Average Remaining Contractual Life, Exercisable at August 31, 2016	2 years 10 months 21 days
Aggregate Intrinsic Value, Outstanding at August 31, 2016 | $	$ 25,279
Aggregate Intrinsic Value, Exercisable at August 31, 2016 | $	$ 24,304