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Stock-Based Compensation - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Maximum number of common shares available for grant | 2,900 |  |
Periods of performance considered for calculating compensation expense | 3 years |  |
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% |  |
Number of common shares reserved for future issuance | 2,781,000 |  |
Directors [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Expense related to director deferred compensation | $ 106,000 | $ 158,000 | $ 91,000
Stock Options [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options exercisable beginning period | 1 year |  |
Maximum rate of stock option, description | Not exceeding 25 percent per year |  |
Option expiring period | 10 years |  |
Compensation expense recognized | $ 9,326,000 | $ 7,874,000 | $ 8,772,000
Unrecognized compensation cost related to nonvested stock option | $ 6,638,000 |  |
Weighted average period expected to be amortized, non vested shares | 1 year 7 months 7 days |  |
Weighted-average expected volatility used | 29.10% | 29.60% | 34.30%
Weighted average grant date fair value of stock options granted | $ 28.86 | $ 18.23 | $ 24.63
Total intrinsic value of options exercised | $ 22,317,000 | $ 17,271,000 | $ 10,406,000
Cash received from the exercise of stock options | 14,086,000 | 11,476,000 | 5,372,000
Tax benefit realized from tax deductions from exercises of stock options | $ 6,685,000 | 3,476,000 | 3,661,000
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 | 1 year 10 months 25 days |  |
Period for restricted shares and share units considered to be forfeited for retirees | 12 months |  |
Unrecognized compensation cost related to nonvested restricted stock | $ 2,829,000 |  |
Expense related to nonvested common shares | 2,127,000 | 1,963,000 | 1,840,000
Common share dividends amount included in compensation cost | $ 64,000 | 60,000 | 51,000
Restricted Stock Unit [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Period for pro-rata vesting of shares or units for non-employee directors | 1 year |  |
Unrecognized compensation cost related to nonvested restricted stock | $ 0 |  |
Expense related to nonvested common shares | $ 1,011,000 | $ 974,000 | $ 972,000
Performance Share Incentive Awards [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Periods of performance considered for calculating compensation expense | 3 years |  |
Weighted average grant date fair value |  | $ 67.69 | $ 76.48
Compensation expense | $ 7,398,000 | $ 7,083,000 | $ 3,459,000
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan | $ 12,820,000 | 10,951,000 |
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 |  |
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 |  |
Deferred Compensation [Member] |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Common share dividends amount included in compensation cost | $ 264,000 | $ 219,000 | $ 179,000
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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