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Rationalizations Rationalization Text (Details) metric_tons in Thousands, $ in Thousands |  | 3 Months Ended | 5 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 02, 2015 employee | Sep. 30, 2015 USD ($) | Sep. 30, 2014 | Dec. 31, 2015 USD ($) | Aug. 14, 2015 USD ($) | Dec. 31, 2015 USD ($) employee metric_tons | Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | $ 660,880 |  | $ 660,880 | $ 1,500,821
Other |  |  |  | 16,790 |  | $ 16,790 | 22,702
Payments for Restructuring |  |  |  | 17 | $ 1,102 |  | $ 16,494
2013 Industrial Materials Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Estimated Reduction in Capacity | metric_tons |  |  |  |  |  | 60 |
Restructuring and Related Cost, Expected Number of Positions Eliminated | employee |  |  |  |  |  | 600 |
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent |  |  |  |  |  |  | 20.00%
2013 Engineered Solutions Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | employee |  |  |  |  |  | 40 |
2013 Rationalization Initiatives [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment |  | $ 0 |  |  |  |  |
2014 Engineered Solutions Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Payments for Restructuring |  |  |  | 72 | 916 |  | $ 916
2014 Corporate and Research & Development Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  | 20,000 |  | $ 20,000 |
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent |  |  | 25.00% |  |  |  |
Payments for Restructuring |  |  |  | 1,127 | 4,611 | 12,000 | 1,155
2015 Advanced Graphite Materials Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | employee | 85 |  |  |  |  |  |
Payments for Restructuring |  |  |  | 3,418 | $ 329 |  |
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | 2013 Rationalization Initiatives [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | 6,600 |  | 6,600 |
Other |  |  |  | 1,200 |  | 1,200 |
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | 2014 Corporate and Research & Development Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | 3,900 |  | 3,900 |
Other |  |  |  | $ 3,600 |  | 3,600 |
Impairments [Member] | 2014 Engineered Solutions Rationalization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Impairments (recorded in Impairments) |  |  |  |  |  | $ 121,570 | $ 121,600

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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