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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

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