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Derivative Instruments and Fair Value Measurement of Assets and Liabilities Derivative Instruments Gain (Loss) Recognized in Income Statement (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Apr. 30, 2013
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Apr. 30, 2012
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Apr. 30, 2013
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Apr. 30, 2012
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Cost of Sales [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Aluminum derivatives | $ (253) | $ (864) | $ (184) | $ 97 |
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Other Non Operating Income (Loss) [Member]
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Foreign currency derivatives | $ 326 | $ (95) | $ (382) | $ 626 |