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Significant Accounting Policies (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jan. 31, 2018 | Jan. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Income Tax (Benefit) Expense | $ (509) | $ 39,365
Accounting Standards Update 2016-09 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Income Tax (Benefit) Expense | $ (4,000) |

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