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Rationalizations Rationalization Text (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]        
Incurred restructuring Charges $ 10,844,000 $ 14,593,000 $ 11,761,000 $ 14,593,000
Impairment charge 0 0 121,570,000 0
2013 Rationalization Initiatives
        
Restructuring Cost and Reserve [Line Items]        
Incurred restructuring Charges 100,000   900,000  
Accelerated depreciation 800,000      
Other (recorded in Cost of sales) 1,600,000   6,800,000  
Expected cost     100,000,000  
Restructuring and related - expected cash outlays     30,000,000  
Cost incurred to date     96,100,000  
Industrial Materials Segment
        
Restructuring Cost and Reserve [Line Items]        
Estimated reduction in capacity (metric tons)     60,000  
Expected number of positions eliminated (employees)     600  
Number of positions eliminated (percent)       20.00%
Engineered Solutions Segment
        
Restructuring Cost and Reserve [Line Items]        
Expected number of positions eliminated (employees)     40  
2014 Engineered Solutions Rationalization
        
Restructuring Cost and Reserve [Line Items]        
Expected cost     25,000,000  
Impairments (recorded in Impairments) 121,600,000      
Restructuring and related - expected cash outlays     5,000,000  
Cost incurred to date     18,800,000  
Goodwill, impairment loss       (413,000)
Inventory write-down     13,400,000  
2014 Corporate and Research & Development Rationalization
        
Restructuring Cost and Reserve [Line Items]        
Number of positions eliminated (percent)       25.00%
Expected cost     20,000,000  
Restructuring and related - expected cash outlays     $ 12,000,000