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Commitments and Contingencies - Additional Information (Detail) ft² in Thousands, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 10, 2014 USD ($) | Oct. 04, 2012 lawsuit patent | Oct. 31, 2017 USD ($) ft² Building | Oct. 31, 2016 USD ($) | Oct. 31, 2015 USD ($) | Mar. 16, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Rent expenses |  |  | $ 68.1 | $ 63.9 | $ 67.6 |
Number of buildings to be leased | Building |  |  | 2 |  |  |
Total square feet of buildings | ft² |  |  | 341 |  |  |
Lease renewal term, in years |  |  | 10 years |  |  |
Second lease renewal term, years |  |  | 9 years |  |  |
Pending Litigation | Mentor Patent Litigation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency patents infringement lawsuits | lawsuit |  | 3 |  |  |  |
Loss contingency, patents allegedly infringed | patent |  | 3 |  |  |  |
Loss contingency, value of damages sought | $ 36.0 |  |  |  |  |
Jury verdict assessing damages, value |  |  |  |  |  | $ 39.0

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