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Contingencies and Commitments (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2012
LegalMatter
Dec. 31, 2012
lb
LegalMatter
Dec. 31, 2011
LegalMatter
Loss Contingencies [Line Items]      
Physical inventory count pre-tax loss $ 7,400,000    
Contingencies And Commitments (Textual) [Abstract]      
Annual deductible to cover defense and indemnity costs incurred 1,000,000.0 1,000,000.0  
Number of CBD cases pending 1 1 2
Reserve for outstanding CBD case 100,000 100,000  
Number of cases settled     1
Case settled     for less than $0.1 million
Settlement payments for beryllium litigation     100,000
Beryllium copper master alloy purchased   775,000  
Purchase commitments   1,800,000  
Purchases Under Committed Contracts   5,200,000 8,800,000
Outstanding letters of credit 26,000,000 26,000,000  
Insurance Claims [Member]
     
Loss Contingencies [Line Items]      
Physical inventory count pre-tax loss $ 7,400,000