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Derivatives Narrative (Details) (USD $)
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3 Months Ended | 6 Months Ended | |
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Feb. 28, 2013
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Feb. 28, 2013
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Aug. 31, 2012
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| Derivative [Line Items] | |||
| Notional amount of foreign currency cash flow hedge | $ 12,700,000 | $ 12,700,000 | $ 2,800,000 |
| Unrealized losses expected to be reclassified during next 12 months | 100,000 | 100,000 | |
| Notional amount of foreign currency fair value hedge derivatives | 133,700,000 | 133,700,000 | 197,500,000 |
| Net foreign currency losses | (900,000) | (300,000) | |
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Level 2 Valuation:
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| Derivative [Line Items] | |||
| Foreign currency derivatives | $ (517,000) | $ (517,000) | $ 945,000 |
| X | ||||||||||
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- Definition
Foreign Currency Contracts Asset Net Of Liabilities Fair Value Disclosure No definition available.
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| X | ||||||||||
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- Definition
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value No definition available.
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- Details
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| X | ||||||||||
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- Definition
The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in fair value hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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