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Stockholders' Equity (Schedule of Changes in Accumulated Other Comprehensive Income (Loss))(Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2016 | Apr. 30, 2015 | Oct. 31, 2015
Foreign Currency Translation Adjustment [Roll Forward] |  |  |  |  |
Foreign Currency Translation Adjustment, Beginning Balance |  |  | $ (171,800) | $ (92,400) | $ (92,400)
Foreign Currency Translation Adjustment, Gross change in value for the period |  |  | (61,500) |  | (79,400)
Foreign Currency Translation Adjustment, Reclassification adjustments for loss realized in net income |  |  | 0 |  | 0
Foreign Currency Translation Adjustment, Tax effect for the period |  |  | 0 |  | 0
Foreign Currency Translation Adjustment, Ending Balance | $ (233,300) |  | (233,300) |  | (171,800)
Change in Value of Derivative Instruments [Roll Forward] |  |  |  |  |
Change in Value of Derivative Instruments, Beginning Balance |  |  | 0 | (100) | (100)
Change in Value of Derivative Instruments, Gross change in value for the period |  |  | 0 |  | 0
Change in Value of Derivative Instruments, Reclassification adjustments for loss realized in net income |  |  | 0 |  | 100
Change in value of derivative instruments, Tax effect for the period | 0 | $ 0 | 0 | (30) | 0
Change in Value of Derivative Instruments, Ending Balance | 0 |  | 0 |  | 0
Minimum Pension Liability [Roll Forward] |  |  |  |  |
Minimum Pension Liability, Beginning Balance |  |  | (19,800) | (13,700) | (13,700)
Minimum Pension Liability, Gross change in value for the period |  |  | (100) |  | (10,000)
Minimum Pension Liability, Reclassification adjustments for loss realized in net income |  |  | 0 |  | 0
Minimum Pension Liability, Tax effect for the period |  |  | 0 |  | 3,900
Minimum Pension Liability, Ending Balance | (19,900) |  | (19,900) |  | (19,800)
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |  |
Total, Beginning balance |  |  | (191,643) | $ (106,200) | (106,200)
Gross change in value for the period |  |  | (61,600) |  | (89,400)
Reclassification adjustments for loss realized in net income |  |  | 0 |  | 100
Tax effect for the period |  |  | 0 |  | 3,900
Total, Ending balance | $ (253,153) |  | $ (253,153) |  | $ (191,643)

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- Definition Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans [Roll Forward] + References No definition available. + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 + Details
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