Stock-Based Compensation (Schedule Of Executive Awards) (Details) $ in Thousands	9 Months Ended
	May 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjusted EBITDA, Number of Shares	128,367
Gross AAP Sales, Number of Shares	55,014
Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjusted EBITDA, Award Goal | $	$ 36,672
Adjusted EBITDA, Number of Shares	42,789
Adjusted EBITDA, Tranche Status	not vested
Gross AAP Sales, Award Goal | $	$ 30,052
Gross AAP Sales, Number of Shares	18,338
Gross AAP Sales, Tranche Status	vested
Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjusted EBITDA, Award Goal | $	$ 41,806
Adjusted EBITDA, Number of Shares	42,789
Adjusted EBITDA, Tranche Status	not vested
Gross AAP Sales, Award Goal | $	$ 35,419
Gross AAP Sales, Number of Shares	18,338
Gross AAP Sales, Tranche Status	vested
Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjusted EBITDA, Award Goal | $	$ 47,658
Adjusted EBITDA, Number of Shares	42,789
Adjusted EBITDA, Tranche Status	not vested
Gross AAP Sales, Award Goal | $	$ 40,758
Gross AAP Sales, Number of Shares	18,338
Gross AAP Sales, Tranche Status	target met