Corporate performance measurement period.

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- Definition

Cumulative amount recorded in shareholders' equity.

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- Definition

Deferred compensation arrangement with individual employee contribution percentage maximum.

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- Definition

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

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- Definition

Grant date weighted average fair value.

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- Definition

Normal retirement age of employees.

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- Definition

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

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No definition available.

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- Definition

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

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No definition available.

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- Definition

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

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- Definition

Transfer restrictions lapse period for non employee directors.

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No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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-Subparagraph (SAB TOPIC 14.F)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

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

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- Definition

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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No definition available.

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- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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-Paragraph 2

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

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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-Section 50

-Paragraph 2

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- Definition

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

+ References

No definition available.

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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

+ References

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- Definition

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

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-Name Accounting Standards Codification

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- Definition

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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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

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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- Definition

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

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- Definition

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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- Definition

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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-Name Accounting Standards Codification

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- Definition

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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- Definition

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 $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of common shares available for grant	2,900
Percentage of base pay and annual incentive compensation deferred	100.00%
Percentage of long term incentive compensation plan deferred	90.00%
Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense related to director deferred compensation	$ 25	$ 27
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	2,468	3,666
Options exercisable beginning period	1 year
Unrecognized compensation cost related to nonvested common shares	11,775
Weighted average period expected to be amortized, non vested shares	1 year 6 months
Weighted-average expected volatility used	34.30%	44.50%
Weighted average grant date fair value of stock options granted	$ 24.63	$ 27.94
Total intrinsic value of options exercised	1,097	3,654
Cash received from the exercise of stock options	832	2,224
Tax benefit realized from tax deductions from exercises of stock options	319	1,088
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 Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested common shares	3,184
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
Period for pro-rata vesting of shares or units for non-employee directors	1 year
Expense related to nonvested common shares	472	472
Common share dividends amount included in compensation cost	13	13
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
Expense related to nonvested common shares	243	222
Unrecognized compensation cost related to nonvested common shares	720
Performance Share Incentive Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value	$ 76.48	$ 69.25	$ 59.59
Compensation expense charged	1,248	1,142
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan	5,351
Periods of performance considered for calculating compensation expense	3 years
Deferred Compensation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common share dividends amount included in compensation cost	$ 39	$ 26
Percentage of base pay and annual incentive compensation deferred	100.00%
Percentage of long term incentive compensation plan deferred	90.00%