Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax
Beginning Balance	$ 306.6	$ 373.9	$ 368.6
Other comprehensive income (loss) before reclassification		(3.2)	(0.7)
Amounts reclassified from accumulated other comprehensive loss		0.3
Ending Balance	265.7	265.7	381.9
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax
Beginning Balance		(2.3)	(2.4)
Other comprehensive income (loss) before reclassification		(0.3)	0.1
Ending Balance	(2.6)	(2.6)	(2.3)
Change in Fair Value of Interest Rate Collars
AOCI Attributable to Parent, Net of Tax
Beginning Balance		(0.4)
Other comprehensive income (loss) before reclassification		(2.9)	(0.8)
Amounts reclassified from accumulated other comprehensive loss		0.3
Ending Balance	(3.0)	(3.0)	(0.8)
Total Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(5.7)	(2.7)	(2.4)
Ending Balance	$ (5.6)	$ (5.6)	$ (3.1)