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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014
Estimates and Critical Accounting Policies [Abstract] |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  | $ 0 | $ 0 |
Foreign Currency Translation [Abstract] |  |  |  |  |  |  |
Net foreign exchange gain (loss) |  |  |  |  | 1,600,000 | 3,500,000 | $ 2,900,000
Property, Plant and Equipment [Abstract] |  |  |  |  |  |  |
Interest capitalized included in construction in progress |  |  |  |  | $ 3,100,000 | $ 6,200,000 |
Treasury Stock [Abstract] |  |  |  |  |  |  |
Number of shares in treasury (in shares) | 3,290,318 |  |  |  | 3,290,318 | 3,290,318 |
Number of shares purchased | 368,000 | 0 | 0 | 100,000 | 0 | 467,539 |
Interest Rate Swap [Member] |  |  |  |  |  |  |
Financial Instruments [Abstract] |  |  |  |  |  |  |
Derivative liability, fair value |  |  |  |  | $ 0 |  |
Building [Member] | Minimum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |  |
Property, plant and equipment, useful life, (years) |  |  |  |  | 30 years |  |
Building [Member] | Maximum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |  |
Property, plant and equipment, useful life, (years) |  |  |  |  | 40 years |  |
Machinery and equipment [Member] | Minimum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |  |
Property, plant and equipment, useful life, (years) |  |  |  |  | 3 years |  |
Machinery and equipment [Member] | Maximum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |  |  |  |
Property, plant and equipment, useful life, (years) |  |  |  |  | 15 years |  |

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