Rationalizations (Rationalization-Rollforward) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Aug. 14, 2015	Dec. 31, 2015	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 45	$ 1,035	$ 1,035	$ 18,421
Charges incurred	154	40		613
Restructuring Reserve, Accrual Adjustment	67	227		153
Payments and settlements	(17)	(1,102)		(16,494)
Effect of change in currency exchange rates	(59)	(155)		(1,658)
Restructuring Reserve	190	45	190	1,035
2015 Advanced Graphite Materials Rationalization [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	4,686	0	0
Charges incurred	647	5,053
Restructuring Reserve, Accrual Adjustment		(38)
Payments and settlements	(3,418)	(329)
Effect of change in currency exchange rates		0
Restructuring Reserve	$ 1,915	$ 4,686	$ 1,915	$ 0