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Rationalizations and Impairments (Rationalization Costs Incurred) (Details) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Aug. 14, 2015
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Aug. 14, 2015
Sep. 30, 2014
Predecessor            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges $ 1,087     $ 19,001 $ 11,722 $ 57,429
Predecessor | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges         2,696 33,653
Predecessor | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 86     7,201    
Predecessor | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges         7,300 20,817
Predecessor | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 876     8,841    
Predecessor | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges         1,726 2,959
Predecessor | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 125     2,959    
Predecessor | 2014 Engineered Solutions Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 79     8,193 280 18,755
Predecessor | 2014 Engineered Solutions Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     2,802 0 2,802
Inventory loss 28     2,606 571 13,168
Fixed asset write-offs and other 15     174 372 174
Predecessor | 2014 Engineered Solutions Rationalization | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 36     2,537 (713) 2,537
Contract terminations 0     74 50 74
Predecessor | Rationalization Plan | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     3,645 432 25,323
Inventory loss 55     2,930 942 14,645
Fixed asset write-offs and other 164     1,474 2,793 5,513
Predecessor | Rationalization Plan | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 625     89 940 89
Predecessor | Rationalization Plan | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     20 2,109 98
Predecessor | Rationalization Plan | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     228 229 756
Predecessor | Rationalization Plan | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     838 432 21,690
Inventory loss 27     324 (33) 991
Fixed asset write-offs and other 59     1,294 1,715 5,203
Predecessor | Rationalization Plan | Industrial Materials | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 0
Predecessor | Rationalization Plan | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     20 400 98
Predecessor | Rationalization Plan | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     82 25 610
Predecessor | Rationalization Plan | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     2,807 0 3,633
Inventory loss 28     2,606 975 13,654
Fixed asset write-offs and other 105     180 1,078 310
Predecessor | Rationalization Plan | Engineered Solutions | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 461     0 0 0
Predecessor | Rationalization Plan | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     0 755 0
Predecessor | Rationalization Plan | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     146 204 146
Predecessor | Rationalization Plan | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 0
Inventory loss 0     0 0 0
Fixed asset write-offs and other 0     0 0 0
Predecessor | Rationalization Plan | Corporate, R&D and Other | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 164     89 940 89
Predecessor | Rationalization Plan | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     0 954 0
Predecessor | Rationalization Plan | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     0 0 0
Predecessor | Rationalization Plan | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 243     10,615 4,277 11,005
Predecessor | Rationalization Plan | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 0     4,643 157 5,061
Predecessor | Rationalization Plan | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 282     3,102 4,288 3,074
Predecessor | Rationalization Plan | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs (39)     2,870 (168) 2,870
Predecessor | 2013 Rationalization Initiatives            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 108     2,512 2,662 30,378
Predecessor | 2013 Rationalization Initiatives | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     838 432 22,516
Inventory loss 27     324 (33) 1,482
Fixed asset write-offs and other 71     1,300 1,985 5,334
Predecessor | 2013 Rationalization Initiatives | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     20 0 99
Predecessor | 2013 Rationalization Initiatives | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 86     2,506 2,236 28,958
Predecessor | 2013 Rationalization Initiatives | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     838 432 21,690
Inventory loss 27     324 (33) 991
Fixed asset write-offs and other 59     1,294 1,715 5,203
Predecessor | 2013 Rationalization Initiatives | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     20 0 99
Predecessor | 2013 Rationalization Initiatives | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 22     6 426 1,420
Predecessor | 2013 Rationalization Initiatives | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 826
Inventory loss 0     0 0 491
Fixed asset write-offs and other 12     6 270 131
Predecessor | 2013 Rationalization Initiatives | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 0
Inventory loss 0     0 0 0
Fixed asset write-offs and other 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 10     (52) 253 338
Predecessor | 2013 Rationalization Initiatives | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 0     (52) 97 366
Predecessor | 2013 Rationalization Initiatives | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 10     0 156 (28)
Predecessor | 2013 Rationalization Initiatives | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Contract Terminations | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     82 25 609
Predecessor | 2013 Rationalization Initiatives | Contract Terminations | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     82 25 609
Predecessor | 2013 Rationalization Initiatives | Contract Terminations | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     0 0 0
Predecessor | 2013 Rationalization Initiatives | Contract Terminations | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0     0 0 0
Predecessor | 2014 Corporate and Research & Development Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 125       2,195 8,298
Predecessor | 2014 Corporate and Research & Development Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     5 0 5
Fixed asset write-offs and other 0       1 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0       940 89
Predecessor | 2014 Corporate and Research & Development Rationalization | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 164       1,354 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 0   $ 4,695   460 4,695
Predecessor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 0
Fixed asset write-offs and other 0   0   0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0   0   0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0   0   400 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 0   644   9 644
Predecessor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     5 0 5
Fixed asset write-offs and other 0   0   1 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0   0   0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 0   0   0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 125   2,959   1,726 2,959
Predecessor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0     0 0 0
Fixed asset write-offs and other 0   0   0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation 0   89   940 89
Predecessor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 164   0   954 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs (39)       (100) 8,130
Predecessor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 0   4,695   60 4,695
Contract terminations 0     0 0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 0   565   8 565
Contract terminations 0     74 0 74
Predecessor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs (39)   $ 2,870   (168) 2,870
Contract terminations 0     $ 0 0 0
Predecessor | 2014 Corporate and Research & Development Rationalization | Contract Terminations | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations 0       0 $ 74
Predecessor | 2015 Advanced Graphite Materials Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges 775       6,585  
Predecessor | 2015 Advanced Graphite Materials Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Inventory loss 0       404  
Fixed asset write-offs and other 78       434  
Predecessor | 2015 Advanced Graphite Materials Rationalization | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other 461       755  
Predecessor | 2015 Advanced Graphite Materials Rationalization | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs 236       4,838  
Contract terminations $ 0       $ 154  
Successor            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   $ 1,360        
Successor | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   186        
Successor | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   186        
Successor | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   1,164        
Successor | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   1,164        
Successor | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   10        
Successor | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   10        
Successor | 2014 Engineered Solutions Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   (135)        
Successor | 2014 Engineered Solutions Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   132        
Fixed asset write-offs and other   (267)        
Successor | 2014 Engineered Solutions Rationalization | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Contract terminations   0        
Successor | Rationalization Plan | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   147        
Fixed asset write-offs and other   366        
Successor | Rationalization Plan | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | Rationalization Plan | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   211        
Successor | Rationalization Plan | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | Rationalization Plan | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   15        
Fixed asset write-offs and other   15        
Successor | Rationalization Plan | Industrial Materials | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | Rationalization Plan | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | Rationalization Plan | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | Rationalization Plan | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   132        
Fixed asset write-offs and other   351        
Successor | Rationalization Plan | Engineered Solutions | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | Rationalization Plan | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   201        
Successor | Rationalization Plan | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | Rationalization Plan | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   0        
Fixed asset write-offs and other   0        
Successor | Rationalization Plan | Corporate, R&D and Other | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | Rationalization Plan | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   10        
Successor | Rationalization Plan | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | Rationalization Plan | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   636        
Successor | Rationalization Plan | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   156        
Successor | Rationalization Plan | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   480        
Successor | Rationalization Plan | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Successor | 2013 Rationalization Initiatives            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   186        
Successor | 2013 Rationalization Initiatives | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   15        
Fixed asset write-offs and other   15        
Successor | 2013 Rationalization Initiatives | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2013 Rationalization Initiatives | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   186        
Successor | 2013 Rationalization Initiatives | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   15        
Fixed asset write-offs and other   15        
Successor | 2013 Rationalization Initiatives | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2013 Rationalization Initiatives | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   0        
Successor | 2013 Rationalization Initiatives | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   0        
Fixed asset write-offs and other   0        
Successor | 2013 Rationalization Initiatives | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2013 Rationalization Initiatives | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   0        
Successor | 2013 Rationalization Initiatives | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Inventory loss   0        
Fixed asset write-offs and other   0        
Successor | 2013 Rationalization Initiatives | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2013 Rationalization Initiatives | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   156        
Successor | 2013 Rationalization Initiatives | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   156        
Successor | 2013 Rationalization Initiatives | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Successor | 2013 Rationalization Initiatives | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Successor | 2013 Rationalization Initiatives | Contract Terminations | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | 2013 Rationalization Initiatives | Contract Terminations | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | 2013 Rationalization Initiatives | Contract Terminations | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | 2013 Rationalization Initiatives | Contract Terminations | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | 2014 Corporate and Research & Development Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   10        
Successor | 2014 Corporate and Research & Development Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Fixed asset write-offs and other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | 2014 Corporate and Research & Development Rationalization | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   10        
Successor | 2014 Corporate and Research & Development Rationalization | Industrial Materials            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   0        
Successor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Fixed asset write-offs and other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | 2014 Corporate and Research & Development Rationalization | Industrial Materials | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   0        
Successor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Fixed asset write-offs and other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | 2014 Corporate and Research & Development Rationalization | Engineered Solutions | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   10        
Successor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Fixed asset write-offs and other   0        
Successor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Research and Development            
Restructuring Cost and Reserve [Line Items]            
Accelerated depreciation   0        
Successor | 2014 Corporate and Research & Development Rationalization | Corporate, R&D and Other | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   10        
Successor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Successor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Industrial Materials | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Contract terminations   0        
Successor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Engineered Solutions | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Contract terminations   0        
Successor | 2014 Corporate and Research & Development Rationalization | Employee Severance | Corporate, R&D and Other | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   0        
Contract terminations   0        
Successor | 2014 Corporate and Research & Development Rationalization | Contract Terminations | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Contract terminations   0        
Successor | 2015 Advanced Graphite Materials Rationalization            
Restructuring Cost and Reserve [Line Items]            
Total rationalization plan and related charges   1,299        
Successor | 2015 Advanced Graphite Materials Rationalization | Cost of Sales            
Restructuring Cost and Reserve [Line Items]            
Inventory loss   0        
Fixed asset write-offs and other   618        
Successor | 2015 Advanced Graphite Materials Rationalization | Selling and Administrative            
Restructuring Cost and Reserve [Line Items]            
Other   201        
Successor | 2015 Advanced Graphite Materials Rationalization | Employee Severance | Rationalizations            
Restructuring Cost and Reserve [Line Items]            
Severance and related costs   480        
Contract terminations   $ 0