Segment Reporting (Schedule Of Financial Information Concerning Reportable Segments) (Details) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended
	Aug. 14, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Aug. 14, 2015 USD ($)	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment					2
Predecessor
Segment Reporting Information [Line Items]
Total net sales	$ 51,604			$ 339,907
Total operating loss	(21,060)			(68,249)
Other expense (income), net	269			1,421
Interest expense	8,790	$ 3,349		26,211
Interest income	(22)			(363)
Loss from continuing operations before provision for income taxes	(30,097)			(95,518)
Predecessor | Industrial Materials
Segment Reporting Information [Line Items]
Total net sales	51,604			339,907
Total operating loss	(2,588)			(24,900)
Predecessor | Corporate, R&D and Other
Segment Reporting Information [Line Items]
Total operating loss	$ (18,472)			$ (43,349)
Successor
Segment Reporting Information [Line Items]
Total net sales		74,774	$ 111,590		$ 322,530
Total operating loss		(298)	(19,651)		(69,684)
Other expense (income), net		703	(567)		(1,528)
Interest expense		3,349	6,964		19,860
Interest income		(21)	(158)		(169)
Loss from continuing operations before provision for income taxes		(4,329)	(25,890)		(87,847)	$ (4,329)
Successor | Industrial Materials
Segment Reporting Information [Line Items]
Total net sales		74,774	111,590		322,530
Total operating loss		2,918	(14,238)		(50,776)
Successor | Corporate, R&D and Other
Segment Reporting Information [Line Items]
Total operating loss		$ (3,216)	$ (5,413)		$ (18,908)