Derivative Financial Instruments Derivative Instruments in Statement of Financial Position and Statement of Financial Performance, Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 28, 2015	Feb. 28, 2015
Derivative [Line Items]
Derivative Gain (Loss) Recognized in Other Income (Expense), net - Not Designated as Cash Flow Hedges	$ (117)	$ (122)
Cash Flow Hedging \| Foreign currency exchange forward contracts
Derivative [Line Items]
Derivative Gain (Loss) Recognized in Other Comprehensive Income (Loss)	(3,424)	(5,136)
Derivative Gain (Loss) Recognized in Revenues - Effective Portion	(853)	(1,354)
Derivative Gain (Loss) Recognized in Other Income (Expense), net - Designated as Cash Flow Hedges	121	175
Not Designated as Hedging Instrument \| Foreign currency exchange forward contracts
Derivative [Line Items]
Derivative Gain (Loss) Recognized in Other Comprehensive Income (Loss)	0	0
Derivative Gain (Loss) Recognized in Revenues - Effective Portion	$ 0	$ 0

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The net gain (loss) relating to components of the gain (loss) on foreign currency cash flow hedging instruments excluded from the assessment of hedge effectiveness. Recognized in earnings.

+ References

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- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959

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