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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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No definition available.

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Number of shares authorized for issuance under share-based payment arrangement.

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Number of options outstanding, including both vested and non-vested options.

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Share-based Compensation - Share-based Plans Narratives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Shares outstanding (shares)	270,000	280,000
Share-based compensation expense	$ 10.6	$ 11.2	$ 8.6
Tax benefit related to share-based compensation	1.4	$ 2.2	$ 1.6
Share based compensation not yet recognized	$ 12.2
Recognition period for unrecognized share based compensation	2 years 1 month 6 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share based compensation not yet recognized	$ 2.2
Recognition period for unrecognized share based compensation	2 years 2 months 12 days
Restricted stock and RSU's
Share-based Compensation Arrangement by Share-based Payment Award
Shares other than options outstanding unvested (shares)	110,000	110,000
Share based compensation not yet recognized	$ 7.2
Recognition period for unrecognized share based compensation	2 years 4 months 24 days
Performance units
Share-based Compensation Arrangement by Share-based Payment Award
Shares other than options outstanding unvested (shares)	70,000.00	90,000.00
Share based compensation not yet recognized	$ 2.8
Recognition period for unrecognized share based compensation	1 year 6 months
2017 Omnibus Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares authorized (shares)	1,700,000
2017 Omnibus Equity Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Shares outstanding (shares)	230,000
2017 Omnibus Equity Plan \| Restricted stock and RSU's
Share-based Compensation Arrangement by Share-based Payment Award
Shares other than options outstanding unvested (shares)	110,000
2017 Omnibus Equity Plan \| Performance units
Share-based Compensation Arrangement by Share-based Payment Award
Shares other than options outstanding unvested (shares)	70,000.00
2009 Omnibus Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares authorized (shares)	3,350,000
2009 Omnibus Equity Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Shares outstanding (shares)	40,000.00