Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Goodwill [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 12,200
Finite-Lived Intangible Assets, Amortization Expense, Year Two	15,400
Finite-Lived Intangible Assets, Amortization Expense, Year Three	14,600
Finite-Lived Intangible Assets, Amortization Expense, Year Four	13,800
Amortization expense of intangible assets	4,000		$ 4,300
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 12,900
Needle Coke
Goodwill [Line Items]
Goodwill, impairment loss			$ 35,381
Decrease in market prices		18.00%