Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) - Predecessor - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill [Line Items]
Gross Carrying Amount	$ 142,300	$ 137,600
Accumulated Amortization & Impairment	(16,339)	(5,432)
Net Carrying Amount	125,961	132,168
Trade Name
Goodwill [Line Items]
Gross Carrying Amount	22,500	22,000
Accumulated Amortization & Impairment	(2,659)	(896)
Net Carrying Amount	19,841	21,104
Technological Know-How
Goodwill [Line Items]
Gross Carrying Amount	55,300	54,100
Accumulated Amortization & Impairment	(8,621)	(2,934)
Net Carrying Amount	46,679	51,166
Customer-Related Intangible
Goodwill [Line Items]
Gross Carrying Amount	64,500	61,500
Accumulated Amortization & Impairment	(5,059)	(1,602)
Net Carrying Amount	$ 59,441	$ 59,898