Goodwill and Intangibles - Schedule of Definite-Lived Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 32.3	$ 32.3
Accumulated Amortization	4.5	3.7
Net Book Value	$ 27.8	$ 28.6
Weighted Average Useful Life	9 years 1 month 6 days	9 years 3 months 18 days
Client lists
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	10 years	10 years
Gross Carrying Amount	$ 26.1	$ 26.1
Accumulated Amortization	3.9	3.3
Net Book Value	$ 22.2	$ 22.8
Weighted Average Useful Life	9 years 1 month 6 days	9 years 3 months 18 days
Trademarks
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	10 years	10 years
Gross Carrying Amount	$ 6.2	$ 6.2
Accumulated Amortization	0.6	0.4
Net Book Value	$ 5.6	$ 5.8
Weighted Average Useful Life	9 years 1 month 6 days	9 years 4 months 24 days