Derivatives And Risk Management (Derivatives Not Designated As Hedging Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	$ (2,469)	$ 4,211	$ (6,932)	$ 3,180
Commodity [Member] | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	129	717	639	306
Commodity [Member] | SG&A expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	0	588	0	0
Foreign exchange [Member] | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	(226)	0	(385)	(11)
Foreign exchange [Member] | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	(250)	0	(371)	0
Foreign exchange [Member] | SG&A expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	(2,122)	2,916	(6,815)	2,880
Other [Member] | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	$ 0	$ (10)	$ 0	$ 5