Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted Stock Awards (RSAs) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Number of Shares
Non-vested at beginning of the period (in shares)	230,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	56,000
Cancelled (in shares)	(27,300)
Vested (in shares)	(55,000)
Non-vested at end of the period (in shares)	203,800
Weighted Average Grant Date Fair Value per Share
Non-vested at beginning of the period (in usd per share)	$ 17.02
Granted (in usd per share)	19.40
Cancelled (in usd per share)	17.31
Vested (in usd per share)	19.45
Non-vested at end of the period (in usd per share)	$ 16.98
Fair value of restricted stock awards vested	$ 1.1	$ 1.3
Unrecognized compensation cost - non vested restricted stock awards	$ 2.2
Weighted-average period over which unrecognized cost is expected to be recognized	2 years 2 months 12 days

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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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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