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Goodwill and Intangibles - Schedule of Definite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 33.0 $ 32.3
Accumulated Amortization 9.2 6.9
Net Book Value $ 23.8 $ 25.4
Weighted Average Useful Life 7 years 7 months 6 days 8 years 4 months 24 days
Client lists    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 10 years 10 years
Gross Carrying Amount $ 26.8 $ 26.1
Accumulated Amortization 7.7 5.9
Net Book Value $ 19.1 $ 20.2
Weighted Average Useful Life 7 years 8 months 12 days 8 years 4 months 24 days
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 10 years 10 years
Gross Carrying Amount $ 6.2 $ 6.2
Accumulated Amortization 1.5 1.0
Net Book Value $ 4.7 $ 5.2
Weighted Average Useful Life 7 years 7 months 6 days 8 years 4 months 24 days