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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Maximum number of common shares available for grant | 2,900 |  |
Executive officers and other highly compensated employees salary and annual cash incentive compensation deferrals percentage, maximum | 100.00% |  |
Executive officers share-based long-term incentive compensation deferrals percentage, maximum | 90.00% |  |
Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Expense related to director deferred compensation | $ 26 | $ 39 |
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 | $ 2,322 | $ 2,156 |
Options exercisable beginning period | 1 year |  |
Unrecognized compensation cost related to unvested stock option | $ 13,630 |  |
Weighted average period expected to be amortized, non vested shares | 1 year 7 months 6 days |  |
Weighted-average expected volatility used | 29.10% | 29.60% |
Weighted average grant date fair value of stock options granted | $ 28.86 | $ 18.23 |
Total intrinsic value of options exercised | $ 12,450 | $ 968 |
Cash received from the exercise of stock options | 8,246 | 900 |
Tax benefit realized from tax deductions from exercises of stock options | $ 3,144 | 198 |
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] |  |  |
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 | $ 3,869 |  |
Expense related to nonvested common shares | 578 | 506 |
Common share dividends amount included in compensation cost | $ 16 | 15 |
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 | $ 750 |  |
Expense related to nonvested common shares | 253 | $ 243 |
Performance Share Incentive Awards [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average grant date fair value |  | $ 67.69 | $ 76.48
Compensation expense | 252 | $ 1,869 |
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan | $ 5,674 |  |
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 |  |
Deferred Compensation [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common share dividends amount included in compensation cost | $ 61 | $ 49 |
Executive officers and other highly compensated employees salary and annual cash incentive compensation deferrals percentage, maximum | 100.00% |  |
Executive officers share-based long-term incentive compensation deferrals percentage, maximum | 90.00% |  |

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