Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	7 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2015	Aug. 14, 2015	Sep. 30, 2016
Goodwill [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 3,600					$ 3,600
Finite-Lived Intangible Assets, Amortization Expense, Year Two	13,600					13,600
Finite-Lived Intangible Assets, Amortization Expense, Year Three	12,900					12,900
Finite-Lived Intangible Assets, Amortization Expense, Year Four	12,200					12,200
Amortization expense of intangible assets	3,500		$ 2,100	$ 10,600		10,700
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 11,400					$ 11,400
Needle Coke
Goodwill [Line Items]
Decrease in market prices		18.00%
Goodwill, impairment loss				$ 35,400	$ 35,381