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Share Based Compensation (Narrative) (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation expense		$ 0.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				318,377
Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	8,960,573
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		7,493,135	7,493,135
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate				33.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period	106,408			426,049
Maximum | Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Awards, Performance Targets			150.00%
Minimum | Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Awards, Performance Targets			0.00%
Exercisable In Increments Over Three-Year Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate				33.00%
Exercisable In Increments Over Four-Year Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate				25.00%
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share option awards, exercisable, increment			3 years
Performance awards, granted, aggregate grant-date fair value				$ 6.7
Performance awards, vested, aggregate fair value				5.2	$ 2.2
Recognized compensation expense				$ 1.0	$ 3.2
Long-Term Incentive Plan (LTIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period		1,100,000
Non-Vested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost on awards		$ 19.9	$ 19.9
Recognized compensation cost, weighted-average period, years			1 year 8 months 12 days
Non-Vested Share Awards [Member] | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate			33.00%
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period		1,312,000
Share option awards, exercisable, increment			2 years 7 months 6 days
Share-Based Compensation Arrangement By Share-Based Payment Award, Unrecognized Compensation Expense			$ 13.0
Performance Based Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period		913,585
Performance Based Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period		0

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

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