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Description of Business (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016
Income tax benefit resulting from early adoption | $ 7,603 | $ 5,561 | $ 10,164 | $ 9,286
Accounting Standards Update 2016-09 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member] |  |  |  |
Income tax benefit resulting from early adoption |  |  | $ (300) |

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