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Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jan. 02, 2020 director $ / shares shares | Dec. 18, 2019 $ / shares shares | Jan. 31, 2020 USD ($) $ / shares shares | Jan. 31, 2019 USD ($) | Apr. 30, 2011 shares
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Restricted shares granted |  |  | 49,000 |  |
Restricted stock closing price awarded (in dollars per share) | $ / shares |  |  | $ 87.48 |  |
Recognized stock-based compensation expense | $ |  |  | $ 0.9 | $ 1.0 |
Unrecognized stock based compensation expenses | $ |  |  | $ 4.1 |  |
Vested, Number of Shares |  |  | 51,000 |  |
Restricted Stock [Member] | Non-employee directors [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Number of non-employee directors | director | 12 |  |  |  |
Restricted shares granted per non-employee | 1,500 |  |  |  |
Restricted shares granted | 18,000 |  |  |  |
Restricted stock closing price awarded (in dollars per share) | $ / shares | $ 87.21 |  |  |  |
Recognized stock-based compensation expense | $ |  |  | $ 0.1 |  |
Restricted Stock [Member] | Executive officers [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Restricted shares granted |  | 31,158 |  |  |
Restricted stock closing price awarded (in dollars per share) | $ / shares |  | $ 87.63 |  |  |
Recognized stock-based compensation expense | $ |  |  | $ 0.2 |  |
Annual incremental vesting percentage |  | 33.00% |  |  |
Stock Options [Member] | Minimum [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Vesting period |  |  | 1 year |  |
Expiration period, after grant date |  |  | 2 years |  |
Stock Options [Member] | Maximum [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Vesting period |  |  | 5 years |  |
Expiration period, after grant date |  |  | 5 years |  |
2011 Management Incentive Plan [Member] |  |  |  |  |
Share-based Compensation |  |  |  |  |
Common stock shares authorized under plan |  |  |  |  | 1,500,000

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- Definition The number of grants made 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) per non-employee. + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + 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=116856206&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=116856206&loc=d3e5070-113901 + Details
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