Cumulative amount recorded in shareholders' equity.

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Grant date weighted average fair value per share.

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Normal retirement age of employees.

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Share based compensation arrangement by share based payment award termination period on death or disability of option holder.

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Share based compensation share based award options forfeiture period for retirees.

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Share based compensation share based award restricted shares forfeiture period for retirees.

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Share based compensation share based award restricted shares termination period for disability or death.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Amount of paid and unpaid cash, stock, and paid-in-kind dividends declared for award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of noncash expense for option under share-based payment arrangement.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common shares authorized for grant	900,000		900,000
Number of common shares available for grant	2,208,000		2,208,000
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%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiring period			10 years
Normal retirement age			65 years
Period for options considered to be forfeited for retirees			12 months
Termination period on death or disability of option holder			12 months
Compensation expense recognized	$ 1,565	$ 2,538	$ 3,801	$ 5,263
Unrecognized compensation cost related to unvested stock option	12,291		$ 12,291
Weighted average period expected to be amortized, non vested shares			1 year 8 months 12 days
Weighted-average expected volatility used			31.00%	25.10%
Weighted average grant date fair value of stock options granted			$ 56.02	$ 37.81
Total intrinsic value of options exercised	12,166	1,704	$ 17,601	$ 18,948
Cash received from the exercise of stock options			$ 18,783	18,547
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum rate of stock option			25.00%
Restricted Shares and Restricted Share Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant restricted shares transferred period			1 year
Restricted Shares and Restricted Share Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant restricted shares transferred period			3 years
Restricted Stock
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 8 months 12 days
Period for restricted shares and share units considered to be forfeited for retirees			12 months
Restricted shares termination period for disability or death			12 months
Unrecognized compensation cost related to nonvested restricted stock	2,655		$ 2,655
Expense related to nonvested common shares	501	688	1,465	2,261
Common share dividends amount included in compensation cost	13	18	$ 31	43
Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period expected to be amortized, non vested shares			1 year 4 months 24 days
Unrecognized compensation cost related to nonvested restricted stock	11,639		$ 11,639
Expense related to nonvested common shares	2,192	298	$ 4,284	584
Performance Share Incentive Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period			3 years
Compensation expense	(460)	(3,703)	$ 4,295	$ (2,282)
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan	4,132		$ 4,132
Performance Share Incentive Awards \| November 23, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value			$ 202.05	$ 201.50
Deferred Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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%
Common share dividends amount included in compensation cost	29	83	$ 58	$ 164
Deferred Compensation \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense related to director deferred compensation	$ 63	$ 42	$ 125	$ 86