Corporate performance measurement period.

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Cumulative amount recorded in shareholders' equity.

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Deferred compensation arrangement with individual employee contribution percentage maximum.

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Deferred compensation arrangement with individual employee contribution percentage of long term incentive compensation maximum.

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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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Restriction period for restricted shares granted.

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Share based compensation arrangement by share based payment award exercisable period.

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Share based compensation arrangement by share based payment award options grants in period vesting period.

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Share based compensation arrangement by share based payment award restriction period.

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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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Transfer restrictions lapse period for non employee directors.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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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 (PIK) dividends declared and applicable to holders of share-based compensation, for example, but not limited to, non-vested shares, stock options, or restricted stock units.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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Weighted average expected volatility rate of share-based compensation awards.

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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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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 share-based compensation awards.

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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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The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of common shares available for grant	4,525		4,525
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	$ 38	$ 30	$ 75	$ 61
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	2,527	2,454	$ 5,058	$ 5,071
Options exercisable beginning period			1 year
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
Options grants in period vesting period			Dec. 28, 2017
Unrecognized compensation cost related to unvested stock option	13,273		$ 13,273
Weighted average period expected to be amortized, non vested shares			1 year 6 months
Weighted-average expected volatility used			24.30%	25.00%
Weighted average grant date fair value of stock options granted			$ 31.74	$ 31.42
Total intrinsic value of options exercised	14,699	11,021	$ 19,321	$ 29,744
Cash received from the exercise of stock options			$ 14,454	15,595
Stock Options [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum rate of stock option			25.00%
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 24 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
Restriction period for restricted shares granted			Dec. 28, 2017
Unrecognized compensation cost related to nonvested restricted stock	5,592		$ 5,592
Expense related to nonvested common shares	1,167	637	1,864	1,391
Common share dividends amount included in compensation cost	18	17	$ 36	34
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			6 months
Period for pro-rata vesting of shares or units for non-employee directors			1 year
Unrecognized compensation cost related to nonvested restricted stock	520		$ 520
Expense related to nonvested common shares	263	252	$ 526	$ 505
Performance Share Incentive Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value			$ 120.12	$ 123.45
Compensation expense	819	1,637	$ 1,596	$ 4,986
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan	9,065		$ 9,065
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	$ 73	$ 67	$ 145	$ 134
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%