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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 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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