Share-Based Compensation - Activity in stock (Details) - Restricted Stock Awards and Units. - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Restricted Stock Awards and Units
Outstanding at beginning of period	238,929	260,850
Granted	82,810	94,592
Vested	(91,867)	(107,113)
Forfeited or cancelled	(22,204)	(10,624)
Outstanding at end of period	207,668	237,705
Weighted Average Grant Date Fair Value
Outstanding at beginning of period	$ 23.66	$ 21.04
Granted	20.85	19.01
Vested	21.29	19.19
Forfeited or cancelled	21.39	23.71
Outstanding at end of period	$ 23.83	$ 20.95
Additional disclosures
Unrecognized compensation cost	$ 3.0
Weighted average period	2 years 6 months

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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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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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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