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Employee Benefit Plans - Stock Option Plans and Stock Purchase Rights Granted Under ESPP (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]      
Excess tax benefits from stock-based compensation $ 4,245 $ 0 $ 0
Stock Option      
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]      
Expected life (in years) 4 years 3 months 18 days 4 years 6 months 4 years 8 months 12 days
Risk-free interest rate, minimum 1.24% 1.38% 0.62%
Risk-free interest rate, maximum 1.58% 1.74% 1.66%
Volatility, minimum 16.92% 18.38% 20.61%
Volatility, maximum 21.76% 20.00% 26.47%
Weighted average estimated fair value $ 8.77 $ 10.95 $ 7.29
Employee Stock Purchase Plan      
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]      
Risk-free interest rate, minimum 0.12% 0.05% 0.10%
Risk-free interest rate, maximum 0.75% 0.58% 0.43%
Volatility, minimum 18.01% 16.84% 17.12%
Volatility, maximum 21.60% 18.78% 21.75%
Weighted average estimated fair value $ 11.11 $ 9.17 $ 8.19
Employee Stock Purchase Plan | Minimum      
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]      
Expected life (in years) 6 months 6 months 6 months
Employee Stock Purchase Plan | Maximum      
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]      
Expected life (in years) 2 years 2 years 2 years