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Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 31, 2018 USD ($) compensation_plan $ / shares shares | Oct. 31, 2017 USD ($) $ / shares shares | Oct. 31, 2016 USD ($) shares | May 12, 2017 shares | May 12, 2016 shares | May 12, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share based compensation, number of plans | compensation_plan | 2 |  |  |  |  |
Stock options granted (shares) | 0 | 0 | 0 |  |  |
Stock options exercised (shares) | 0 | 0 | 0 |  |  |
Number of shares forfeited | 0 | 0 | 0 |  |  |
Long-term incentive plan, requisite service period | 3 years |  |  |  |  |
Payments for employee long term incentive plan paid in cash | 50.00% |  |  |  |  |
Payments for employee long term incentive plan in restricted shares | 50.00% |  |  |  |  |
Share based compensation expense | $ | $ 6.5 | $ 2.9 | $ 2.8 |  |  |
Long Term Incentive Plan Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares of restricted stock (shares) | 85,469 |  |  |  |  |
Weighted average grant date fair value (usd per share) | $ / shares | $ 62.20 |  |  |  |  |
Share based compensation expense | $ | $ 5.3 | $ 1.7 | 1.5 |  |  |
2005 Outside Directors Equity Award Plan Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares of restricted stock (shares) | 20,529 | 19,368 |  |  |  |
Weighted average grant date fair value (usd per share) | $ / shares | $ 59.18 | $ 58.08 |  |  |  |
Share based compensation expense | $ | $ 1.2 | $ 1.1 | 1.1 |  |  |
Class A Common Stock 2001 Plan | Officer |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share based compensation expense | $ |  | $ 0.1 | $ 0.2 |  |  |
Grants in the period (shares) |  |  | 15,000 |  |  |
Vesting installments (shares) |  |  |  | 5,000 | 5,000 | 5,000

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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