Share-based Compensation (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, fair value of awards granted	$ 19.4
Allocated share-based compensation expense	6.0	$ 4.0
Share based compensation expense not yet recognized	$ 29.5
Period in which unrecognized share based compensation will be recognized (in years)	2 years 7 months 6 days
Director
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, fair value of restricted shares granted	$ 0.4
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, shares granted (shares)	70
Share-based compensation, vesting period (in years)	4 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, restricted shares granted (shares)	70
Share-based compensation, vesting period (in years)	3 years
Share-based compensation, shares vested other than options (shares)	40
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, restricted shares granted (shares)	40
Share-based compensation, vesting period (in years)	3 years
Share-based compensation, shares vested other than options (shares)	20
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation, shares vested other than options (shares)	40

Share-based Compensation Arrangement by Share-based Payment Award, Total Fair Value Granted During Period, Employees

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Shares Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Gross number of share options (or share units) granted during the period.

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