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Rationalizations Rationalization Costs Incurred (Details) - USD ($)
$ in Thousands
 5 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2015
Aug. 14, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Restructuring Reserve [Roll Forward]          
Restructuring Reserve $ 45 $ 1,035 $ 1,035 $ 18,421  
Charges incurred 154 40   613  
Change in estimates (67) (227)   (153)  
Payments and settlements (17) (1,102)   (16,494)  
Effect of change in currency exchange rates (59) (155)   (1,658)  
Restructuring Reserve 190 45 190 1,035 $ 18,421
2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring Reserve 4,686 0 0    
Charges incurred 647 5,053      
Change in estimates   38      
Payments and settlements (3,418) (329)      
Effect of change in currency exchange rates   0      
Restructuring Reserve 1,915 4,686 1,915 0  
2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring Reserve 77 1,655 1,655 0  
Charges incurred   50   2,611  
Change in estimates (5) (713)   (40)  
Payments and settlements (72) (916)   (916)  
Effect of change in currency exchange rates   1   0  
Restructuring Reserve 0 77 0 1,655 0
2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring Reserve 2,081 6,873 6,873 0  
Charges incurred   (33)   8,159  
Change in estimates (47) 67   (21)  
Payments and settlements (1,127) (4,611) (12,000) (1,155)  
Effect of change in currency exchange rates (57) (81)   (152)  
Restructuring Reserve 944 2,081 $ 944 6,873 0
Predecessor [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   6,585      
Predecessor [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   280   19,766  
Predecessor [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   2,195   11,813  
Predecessor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   9   737  
Predecessor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   460   4,786  
Predecessor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs   1,726   6,290  
Predecessor [Member] | Cost of Sales [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring and Related Cost, Inventory Loss   404      
Fixed Asset Write-offs and Other   434      
Predecessor [Member] | Cost of Sales [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   0   2,802  
Restructuring and Related Cost, Inventory Loss   571   13,225  
Fixed Asset Write-offs and Other   372   1,046  
Predecessor [Member] | Cost of Sales [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       20  
Fixed Asset Write-offs and Other   1   178  
Predecessor [Member] | Cost of Sales [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       20  
Fixed Asset Write-offs and Other   1   0  
Predecessor [Member] | Cost of Sales [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       0  
Fixed Asset Write-offs and Other   0   178  
Predecessor [Member] | Cost of Sales [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       0  
Fixed Asset Write-offs and Other   0   0  
Predecessor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   432   23,215 28,326
Restructuring and Related Cost, Inventory Loss   (33)   1,446 8,782
Fixed Asset Write-offs and Other   1,985   5,607 8,378
Predecessor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   0   827 0
Restructuring and Related Cost, Inventory Loss   0   485 896
Fixed Asset Write-offs and Other   270   233 2,274
Predecessor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   432   22,388 28,326
Restructuring and Related Cost, Inventory Loss   (33)   961 7,886
Fixed Asset Write-offs and Other   1,715   5,374 6,104
Predecessor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   0   0 0
Restructuring and Related Cost, Inventory Loss   0   0 0
Fixed Asset Write-offs and Other         $ 0
Predecessor [Member] | Rationalizations [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   (713)   2,498  
Contract terminations and other (recorded in Rationalizations)   50   195  
Predecessor [Member] | Research and Development Expense [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   940   2,312  
Predecessor [Member] | Research and Development Expense [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   0   0  
Predecessor [Member] | Research and Development Expense [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   0   0  
Predecessor [Member] | Research and Development Expense [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation   940   2,312  
Predecessor [Member] | Selling, General and Administrative Expenses [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales)   755      
Predecessor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       608  
Other (recorded in Cost of sales)   1,354   515  
Predecessor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       0  
Other (recorded in Cost of sales)   0   0  
Predecessor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       0  
Other (recorded in Cost of sales)   400   0  
Predecessor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation       608  
Other (recorded in Cost of sales)   954   515  
Successor [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs 2,812        
Successor [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs (309)        
Successor [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs 338        
Successor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs 0        
Successor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs (23)        
Successor [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring costs 361        
Successor [Member] | Cost of Sales [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring and Related Cost, Inventory Loss (47)        
Fixed Asset Write-offs and Other 855        
Successor [Member] | Cost of Sales [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Accelerated depreciation 0        
Restructuring and Related Cost, Inventory Loss (80)        
Fixed Asset Write-offs and Other (229)        
Successor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring and Related Cost, Inventory Loss (307)        
Fixed Asset Write-offs and Other 400        
Successor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring and Related Cost, Inventory Loss (29)        
Fixed Asset Write-offs and Other 71        
Successor [Member] | Cost of Sales [Member] | 2013 Rationalization Initiatives [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Restructuring and Related Cost, Inventory Loss (278)        
Fixed Asset Write-offs and Other 329        
Successor [Member] | Rationalizations [Member] | 2014 Engineered Solutions Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) 0        
Contract terminations and other (recorded in Rationalizations) 0        
Successor [Member] | Selling, General and Administrative Expenses [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales) 1,213        
Successor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales) 290        
Successor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales) 0        
Successor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales) 0        
Successor [Member] | Selling, General and Administrative Expenses [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Other (recorded in Cost of sales) 290        
Employee Severance [Member] | Predecessor [Member] | Rationalizations [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   4,838      
Contract terminations and other (recorded in Rationalizations)   154      
Employee Severance [Member] | Predecessor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   (100)   8,096  
Contract terminations and other (recorded in Rationalizations)       84  
Employee Severance [Member] | Predecessor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   8   644  
Contract terminations and other (recorded in Rationalizations)       73  
Employee Severance [Member] | Predecessor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   60   4,608  
Contract terminations and other (recorded in Rationalizations)       0  
Employee Severance [Member] | Predecessor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations)   $ (168)   2,844  
Contract terminations and other (recorded in Rationalizations)       $ 11  
Employee Severance [Member] | Successor [Member] | Rationalizations [Member] | 2015 Advanced Graphite Materials Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) 769        
Contract terminations and other (recorded in Rationalizations) 22        
Employee Severance [Member] | Successor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) 48        
Employee Severance [Member] | Successor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Engineered Solutions [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) 0        
Employee Severance [Member] | Successor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Industrial Materials [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) (23)        
Employee Severance [Member] | Successor [Member] | Rationalizations [Member] | 2014 Corporate and Research & Development Rationalization [Member] | Corporate and Other [Member]          
Restructuring Reserve [Roll Forward]          
Severance and related charges (recorded in Rationalizations) $ 71