Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Change in Goodwill	$ 0	$ 0	$ 0	$ 0
Goodwill, impairment	0	0	0	0
Intangible assets amortization expense	$ 1,300,000	$ 1,500,000	$ 4,000,000	$ 4,600,000