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Long-Term Debt And Liquidity (Narrative) (Details) (USD $)
 12 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Nov. 30, 2010
Senior Subordinated Notes [Member]
Dec. 31, 2013
Senior Subordinated Notes [Member]
Dec. 31, 2012
Senior Subordinated Notes [Member]
Debt Instrument [Line Items]              
Long-term debt $ 541,593,000 $ 535,709,000          
LIBOR plus margin percentage     1.50% 2.25%      
Alternate base rate plus margin percentage     0.50% 1.25%      
Addition to federal effective fund rate to determine base rate 0.50%            
Percentage of one-month interest rate plus London interbank offering rate 1.00%            
Per annum fee by GrafTech Finance and Swissco     0.25% 0.40%      
Financial covenants, minimum interest coverage ratio 3.00            
Financial covenants, maximum net senior secured leverage ratio   2.25          
Face amount of debt issued in connection with acquisition         200,000,000    
Senior subordinated notes implied rate 7.00%       7.00%    
Loan balance, net of unamortized discount   $ 535,709,000       $ 175,675,000 $ 164,183,000