Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill [Line Items]
Amortization expense	$ 1.3	$ 1.3
Weighted average remaining lives of identifiable intangible assets	8 years 8 months 12 days
Minimum [Member]
Goodwill [Line Items]
Intangible assets, estimated useful lives	3 years
Maximum [Member]
Goodwill [Line Items]
Intangible assets, estimated useful lives	25 years