Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets	$ 10.8	$ 9.0
Future Amortization Expense Year 2015	41.5
Future Amortization Expense Year 2016	36.1
Future Amortization Expense Year 2017	31.5
Future Amortization Expense Year 2018	27.5
Future Amortization Expense Year 2019	$ 23.3