Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) - Predecessor [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Aug. 14, 2015
Goodwill [Line Items]
Gross Carrying Amount		$ 142,300	$ 142,300
Accumulated Amortization		(5,477)	(19,809)
Net Carrying Amount		136,823	$ 122,491
Trade Name [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 22,500	22,500
Accumulated Amortization	(3,235)	(889)
Net Carrying Amount	19,265	21,611
Technological Know-How [Member]
Goodwill [Line Items]
Gross Carrying Amount	55,300	55,300
Accumulated Amortization	(10,397)	(2,900)
Net Carrying Amount	44,903	52,400
Customer Related Intangible [Member]
Goodwill [Line Items]
Gross Carrying Amount	64,500	64,500
Accumulated Amortization	(6,177)	(1,688)
Net Carrying Amount	$ 58,323	$ 62,812