Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax
Beginning Balance	$ 226.0
Ending Balance	250.8	$ 226.0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(1.8)	(2.3)	$ (2.2)
Other comprehensive income (loss) before reclassification	0.5	0.5	(0.1)
Ending Balance	(1.3)	(1.8)	(2.3)
Interest Rate Collars
AOCI Attributable to Parent, Net of Tax
Beginning Balance		(0.5)	(2.2)
Amounts reclassified from accumulated other comprehensive loss		0.5	1.7
Ending Balance			(0.5)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(1.8)	(2.8)	(4.4)
Other comprehensive income (loss) before reclassification	0.5	0.5	(0.1)
Amounts reclassified from accumulated other comprehensive loss		0.5	1.7
Ending Balance	$ (1.3)	$ (1.8)	$ (2.8)