Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		7 Months Ended
	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Aug. 14, 2015
Goodwill [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 13,600			$ 13,600
Finite-Lived Intangible Assets, Amortization Expense, Year Two	12,900			12,900
Finite-Lived Intangible Assets, Amortization Expense, Year Three	12,200			12,200
Finite-Lived Intangible Assets, Amortization Expense, Year Four	11,400			11,400
Amortization expense of intangible assets	3,600		$ 4,400	7,200	$ 8,700
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 10,700			$ 10,700
Needle Coke
Goodwill [Line Items]
Decrease in market prices		18.00%
Goodwill, impairment loss					$ 35,400	$ 35,381