Goodwill and Intangible Assets (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2019
Finite-Lived Intangible Assets [Line Items]
Foreign currency translation gains (losses)	$ (0.3)	$ (0.3)
Amortization expense	3.4	$ 2.7	$ 2.4
Estimated annual amortization expense, 2020	4.0
Estimated annual amortization expense, 2021	3.5
Estimated annual amortization expense, 2022	3.5
Estimated annual amortization expense, 2023	2.9
Estimated annual amortization expense, 2024	$ 2.6
Business acquisition, recognized goodwill				$ 2.6
Business acquisition, recognized intangible assets				$ 11.2