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Rationalizations Rationalization Costs Incurred (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]    
Restructuring and Related Cost, Incurred Cost $ 86 $ 0
Restructuring Costs and Asset Impairment Charges 17,433  
Other Rationalization Charges in Cost of Sales 321  
Other Restructuring Costs 15  
Restructuring and related severance costs 86  
Restructuring Charges 17,855  
Industrial Materials [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring Reserve, Accelerated Depreciation 17,020  
Other Rationalization Charges in Cost of Sales 321  
Other Restructuring Costs 25  
Restructuring and related severance costs 114  
Engineered Solutions [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs and Asset Impairment Charges 413  
Other Rationalization Charges in Cost of Sales 0  
Other Restructuring Costs (10)  
Restructuring and related severance costs $ (28)