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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Maximum number of common shares available for grant | 2,900 |  |
Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Expense related to director deferred compensation | $ 31 | $ 26 |
Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Maximum rate of stock option, description | Not exceeding 25 percent per year |  |
Option expiring period | 10 years |  |
Compensation expense recognized | $ 2,617 | $ 2,322 |
Options exercisable beginning period | 1 year |  |
Unrecognized compensation cost related to unvested stock option | $ 15,201 |  |
Weighted average period expected to be amortized, non vested shares | 1 year 7 months 6 days |  |
Weighted-average expected volatility used | 25.00% | 29.10% |
Weighted average grant date fair value of stock options granted | $ 31.42 | $ 28.86 |
Total intrinsic value of options exercised | $ 18,723 | $ 12,450 |
Cash received from the exercise of stock options | $ 10,306 | 8,246 |
Stock Options [Member] | Maximum [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Maximum rate of stock option | 25.00% |  |
Stock Options [Member] | Post November 2012 Option Plan [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Normal retirement age | 65 years |  |
Period for options considered to be forfeited for retirees | 12 months |  |
Restricted Shares and Restricted Share Units [Member] | Maximum [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Grant restricted shares transferred period | 3 years |  |
Restricted Shares and Restricted Share Units [Member] | Minimum [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Grant restricted shares transferred period | 1 year |  |
Restricted Stock [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Normal retirement age | 65 years |  |
Weighted average period expected to be amortized, non vested shares | 2 years 2 months 12 days |  |
Period for restricted shares and share units considered to be forfeited for retirees | 12 months |  |
Unrecognized compensation cost related to nonvested restricted stock | $ 4,678 |  |
Expense related to nonvested common shares | 754 | 578 |
Common share dividends amount included in compensation cost | $ 17 | 16 |
Restricted Stock Unit [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average period expected to be amortized, non vested shares | 9 months 18 days |  |
Period for pro-rata vesting of shares or units for non-employee directors | 1 year |  |
Unrecognized compensation cost related to nonvested restricted stock | $ 751 |  |
Expense related to nonvested common shares | $ 253 | 253 |
Performance Share Incentive Awards [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average grant date fair value | $ 123.45 |  | $ 67.69
Compensation expense | $ 3,349 | $ 252 |
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan | $ 10,471 |  |
Periods of performance considered for calculating compensation expense | 3 years |  |
Performance Share Incentive Awards [Member] | November 28, 2016 [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average grant date fair value |  | $ 104.49 |
Performance Share Incentive Awards [Member] | November 21, 2016 [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average grant date fair value |  | $ 103.75 |

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