Segment Reporting (Schedule Of Financial Information Concerning Reportable Segments) (Details) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Aug. 14, 2015 USD ($)	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment			2
Net sales			$ 686,672	$ 1,085,304	$ 1,166,674
Loss Related to Bankruptcy of Major Customer			4,800
Industrial Materials [Member]
Segment Reporting Information [Line Items]
Other (income) expense, net		$ 2,700		60,300	34,500
Preferred Stock Issuance Expense		3,200
Mark To Market Adjustment			3,500	4,200
Impairment of long-lived assets and goodwill		35,400		75,700
Engineered Solutions [Member]
Segment Reporting Information [Line Items]
Other (income) expense, net	$ 3,000	6,900		3,600	22,000
Preferred Stock Issuance Expense		2,500
Mark To Market Adjustment			9,200	5,900
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Other (income) expense, net		2,100		1,800	6,300
Preferred Stock Issuance Expense		19,400
Mark To Market Adjustment			(6,300)	4,200
Proxy Context Costs			2,400
Predecessor [Member]
Segment Reporting Information [Line Items]
Net sales		437,931		1,085,304	1,166,674
Total segment operating income (loss)		(88,477)		(255,620)	(2,570)
Other (income) expense, net		1,335		2,445	1,698
Interest expense		27,118		37,057	36,037
Interest income		(367)		(330)	(203)
Income before income taxes		(116,563)		(294,792)	(40,102)
Impairment of long-lived assets and goodwill		35,381		197,220	0
Predecessor [Member] | Industrial Materials [Member]
Segment Reporting Information [Line Items]
Net sales		341,974		840,103	909,448
Total segment operating income (loss)		(25,678)		(50,260)	20,007
Predecessor [Member] | Engineered Solutions [Member]
Segment Reporting Information [Line Items]
Net sales		95,957		245,201	257,226
Total segment operating income (loss)		(15,368)		(138,271)	28,392
Predecessor [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total segment operating income (loss)		$ (47,431)		(67,089)	$ (50,969)
Successor [Member]
Segment Reporting Information [Line Items]
Net sales	248,741
Total segment operating income (loss)	(16,709)
Other (income) expense, net	(943)
Interest expense	10,916
Interest income	(11)
Income before income taxes	(26,671)
Impairment of long-lived assets and goodwill	0
Successor [Member] | Industrial Materials [Member]
Segment Reporting Information [Line Items]
Net sales	193,223
Total segment operating income (loss)	(4,017)
Successor [Member] | Engineered Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	55,518
Total segment operating income (loss)	(457)
Successor [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total segment operating income (loss)	$ (12,235)
Impairments [Member] | 2014 Engineered Solutions Rationalization [Member]
Segment Reporting Information [Line Items]
Impairments (recorded in Impairments)			$ 121,570	$ 121,600