Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Aug. 14, 2015	Sep. 30, 2014	Dec. 31, 2014
Goodwill [Line Items]
Amortization expense of intangible assets		$ 10.8	$ 14.3
Needle Coke
Goodwill [Line Items]
Goodwill, impairment loss	$ 35.4			$ 75.7
Decrease in market prices	18.00%
Discounted cash flow model, period of forecasted cash flows	17 years
Discounted cash flow model, discount rate	10.50%