Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	Nov. 30, 2015	Aug. 31, 2015	Nov. 30, 2014	Aug. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 129,260	$ 139,093	$ 139,287	$ 171,842
Derivative assets	2,155	712	1,253
Derivative liabilities	(342)	(413)	(87)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	129,260	139,093	139,287
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,155	712	1,253
Derivative liabilities	$ (342)	$ (413)	$ (87)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Derivative assets
Derivative liabilities