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Employee Retirement Plans - Narrative (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Mar. 20, 2018	Sep. 30, 2018	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]
Contribution made		$ 2.6
Contribution made, fixed contributions		1.5
Contribution made, profit related contributions		1.1
Expected contributions		1.6
Expected contributions, fixed contributions		1.2
Expected contributions, profit related contributions		$ 0.4
GMSL
Defined Contribution Plan Disclosure [Line Items]
Deferred contribution	$ 13.1
Percent of operating profit	10.00%
Years in arrears	2 years
Variable contribution, percent of dividends	50.00%
GMSL | Scenario, Forecast
Defined Contribution Plan Disclosure [Line Items]
Fixed contributions			$ 3.1	$ 7.2	$ 7.1	$ 6.8	$ 2.7

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