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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On July 28, 2015, GrafTech and certain of its subsidiaries entered into an amendment to the Amended and Restated Credit Agreement to change the terms regarding the occurrence of a default upon a change in control (which is defined thereunder to include the acquisition by any person of more than 25 percent of GrafTech’s outstanding shares) to exclude the acquisition of shares by Brookfield (see Note 2 to the Financial Statements). In addition, effective upon such acquisition, the financial covenants will be eased, resulting in increased availability under the Revolving Facility. The size of the Revolving Facility will also be reduced from $400 million to $375 million. The interest rate applicable to the Revolving Facility is LIBOR plus a margin ranging from 2.25% to 4.75% (depending on our total senior secured leverage ratio). The borrowers pay a per annum fee ranging from 0.35% to 0.70% (depending on our senior secured leverage ratio) on the undrawn portion of the commitments under the Revolving Facility. The new financial covenants, when they become effective, require us to maintain a minimum cash interest coverage ratio ranging from 1.50 to 2.50 and a maximum senior secured leverage ratio ranging from 5.75 to 3.00, subject to adjustment over time.