Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Change in Goodwill	$ 0	$ 0
Goodwill, impairment	0	0
Intangible assets amortization expense	$ 1,400,000	$ 1,400,000