Credit Facilities and Long-Term Debt, Deferred Financing Costs (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Deferred Financing Costs [Abstract]
Deferred financing costs	$ 1.0	$ 1.1
Amortization of financing costs reminder of 2019	0.2
Amortization of financing costs in 2020	0.2
Amortization of financing costs in 2021	0.2
Amortization of financing costs in 2022	0.2
Amortization of financing costs in 2023	$ 0.2