Employee Benefit Plans - Projected Benefit Obligation and Plan Asset Fund Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 63.5	$ 62.5
Interest cost	1.7	1.7	$ 1.8
Assumption changes	(12.4)	(1.9)
Acquisition of Hudson Plan	0.0	3.1
Benefits paid	(3.0)	(2.8)
Actuarial losses	0.2	0.9
Projected benefit obligation at year end	50.0	63.5	62.5
Change in plan assets:
Fair value of plan assets at beginning of year	61.9	53.9
Actual return	(9.8)	8.3
Acquisition of Hudson Plan	0.0	2.4
Employer contributions	0.0	0.1
Benefits paid	(3.0)	(2.8)
Fair value of plan assets at year end	49.1	61.9	53.9
Funded status (Accrued pension liabilities)	(0.9)	(1.6)
Unrecognized actuarial loss recognized in accumulated other comprehensive loss	10.3	8.0
Projected benefit obligation	50.0	63.5	62.5
Fair value of plan assets	49.1	61.9	$ 53.9
Accrued pension liability	$ (0.9)	$ (1.6)