Goodwill and Intangible Assets (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Asset Impairment Charges, Patent	$ 2.8
Asset Impairment Charges, Trademark	10.0
Foreign currency translation gains (losses)	0.3	$ 0.9
Amortization expense	2.6	$ 3.5	$ 4.9
Estimated annual amortization expense, 2017	4.1
Estimated annual amortization expense, 2018	3.5
Estimated annual amortization expense, 2019	3.6
Estimated annual amortization expense, 2020	3.6
Estimated annual amortization expense, 2021	$ 3.5