Long Term and Other Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Senior bank debt	$ 273.1	$ 131.2
Finance lease liabilities	0.1	0.6
Total long-term debt outstanding	273.2	131.8
Less: current portion of long-term debt	(2.7)	(0.5)
Long-term debt, excluding current portion	270.5	131.3
Senior Bank Debt [Member]
Debt Instrument [Line Items]
Senior bank debt	288.6	140.0
Finance lease liabilities	0.1	0.6
Total long-term debt outstanding	288.7	140.6
Less: current portion of long-term debt	(2.7)	(0.5)
Long-term debt, excluding current portion	286.0	140.1
Unamortized deferred financing charge	(15.5)	(8.8)
Unamortized deferred financing charge, Total long-term debt outstanding	(15.5)	(8.8)
Unamortized deferred financing charge, Long-term debt, excluding current portion	$ (15.5)	$ (8.8)