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Employee Benefit Plans - Summary of Impact of Deferred Plan (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Increase (reduction) to cost of revenue and operating expense | $ 29,606 | $ 4,400 | $ 3,701
Other income (expense), net | 29,606 | 4,400 | 3,701
Net increase (decrease) to net income | $ 0 | $ 0 | $ 0

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