Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	May 31, 2016	Aug. 31, 2015	May 31, 2015	Aug. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 91,498	$ 139,093	$ 154,018	$ 171,842
Derivative assets	874	712	118
Derivative liabilities	(186)	(413)	(216)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	91,498	139,093	154,018
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	874	712	118
Derivative liabilities	(186)	(413)	(216)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents
Derivative assets
Derivative liabilities