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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table | Pay Versus Performance
Year |  | Summary Compensation Table Total for PEO Flanagan (1) ($) |  | Compensation Actually Paid to PEO Flanagan (1)(2) ($) |  | Summary Compensation Table Total for Former PEO Kessler (3) ($) |  | Compensation Actually Paid to Former PEO Kessler (3)(2) ($) |  | Summary Compensation Table Total for Former PEO Rintoul (4) ($) |  | Compensation Actually Paid to Former PEO Rintoul (4)(2) ($) |  | Average Summary Compensation Table Total for Non-PEO Named Executive Officers (5) ($) |  | Average Compensation Actually Paid to Non-PEO Named Executive Officers (5)(6) ($) |  | Value of Initial Fixed $100 Investment Based On: |  | Net (Loss) Income (in 000s) ($) |  | Adjusted EBITDA (7) (in 000s) ($)
| GrafTech Total Stockholder Return |  | NYSE Arca Steel Index (TR) Total Stockholder Return
2024 |  | 3,023,506 |  | 2,393,131 |  | N/A |  | N/A |  | N/A |  | N/A |  | 1,494,232 |  | 1,393,696 |  | $15 |  | $196 |  | (131,165) |  | 1,632
2023 |  | 1,535,021 |  | 808,453 |  | 3,521,684 |  | 674,631 |  | N/A |  | N/A |  | 1,423,584 |  | 727,028 |  | $19 |  | $238 |  | (255,250) |  | 20,484
2022 |  | N/A |  | N/A |  | 1,407,268 |  | 1,153,710 |  | 1,406,150 |  | 1,405,993 |  | 1,538,305 |  | 1,097,819 |  | $42 |  | $179 |  | 382,962 |  | 536,464
2021 |  | N/A |  | N/A |  | N/A |  | N/A |  | 3,445,257 |  | 4,377,435 |  | 6,471,272 |  | 6,656,296 |  | $104 |  | $156 |  | 388,330 |  | 669,940
2020 |  | N/A |  | N/A |  | N/A |  | N/A |  | 2,433,525 |  | 2,691,429 |  | 1,146,426 |  | 1,248,844 |  | $93 |  | $121 |  | 434,374 |  | 658,946
(1) | Mr. Flanagan was appointed Interim Chief Executive Officer and President as of November 15, 2023 and became our Chief Executive Officer and President on March 26, 2024. Mr. Flanagan previously served as our Chief Financial Officer, Senior Vice President Finance and Treasurer since November 29, 2021. Our principal executive officer is referred to as the “PEO” in this disclosure. Mr. Flanagan was one of our PEOs during 2023 and was our only PEO during 2024.
(2) | “Compensation actually paid” to our CEO in 2024 reflects the respective amount set forth in the table above, adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amount reflected in the table above does not reflect the actual amount of compensation earned by or paid to our CEO during 2024. For information regarding the decisions made by our Human Resources and Compensation Committee in regards to the CEO’s and each of our former CEOs’ compensation for each fiscal year, please see the “Compensation Discussion & Analysis” sections of the proxy statements reporting pay for the fiscal years covered in the table above. Please note that while similar adjustment information was provided in our 2024 proxy statement for Covered Years (as defined below) 2020, 2021, 2022 and 2023, under applicable SEC guidance, repeating such adjustment information is not required in this Proxy Statement because in our view it is not material to our stockholders’ understanding of the information reported in the Pay Versus Performance table above for 2024 or the relationships disclosures provided below.
|  | 2024
|  | Flanagan
SCT Total Compensation |  | $3,023,506
Less: Stock Award Value Reported in SCT for the Covered Year |  | $(1,384,742)
Less: Option Award Value Reported in SCT for the Covered Year |  | —
Plus: Covered Year-End Fair Value for Stock Awards Granted in the Covered Year |  | $829,079
Change in Fair Value (from Prior Year-End to Covered Year-End) of Covered Year-End Outstanding Unvested Stock Awards Granted Prior to Covered Year |  | $(43,817)
Change in Fair Value (from Prior Year-End to Vesting Date) of Stock Awards Granted Prior to Covered Year that Vested in the Covered Year |  | $(30,895)
Fair Value as of the Vesting Date for Stock Awards Granted and Vested in the Covered Year |  | —
Less: Prior Year-End Fair Value of Stock and Option Awards Forfeited in the Covered Year |  | —
Compensation Actually Paid |  | $2,393,131
(3) | Mr. Kessler was one of our PEOs during each of 2023 and 2022. Mr. Kessler resigned from the Company as our Chief Executive Officer and President as of November 15, 2023.
(4) | Mr. David J. Rintoul was our only PEO during 2020 and 2021, and one of our PEOs during 2022. Mr. Rintoul resigned from the Company as our Chief Executive Officer and President on June 30, 2022.
(5) | The identity of the non-PEO NEOs for each of 2024, 2023, 2022, 2021 and 2020 (each, a “Covered Year”) are as follows:
Year |  | Non-PEO NEOs
2020 |  | Quinn J. Coburn, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2021 |  | Timothy K. Flanagan, Quinn J. Coburn, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2022 |  | Timothy K. Flanagan, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2023 |  | Catherine Hedoux-Delgado, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2024 |  | Rory F. O’Donnell, Catherine Hedoux-Delgado, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
(6) | Average “compensation actually paid” for our non-PEO NEOs in 2024 reflects the respective amount set forth in the table above, adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amount reflected in the table above does not reflect the actual amount of compensation earned by or paid to our non-PEO NEOs during 2024. For information regarding the decisions made by our Human Resources and Compensation Committee in regards to the non-PEO NEOs’ compensation for each fiscal year, please see the “Compensation Discussion & Analysis” sections of the proxy statements reporting pay for the fiscal years covered in the table above. Please note that while similar adjustment information was provided in our 2024 proxy statement for Covered Years 2020, 2021, 2022 and 2023, under applicable SEC guidance, repeating such adjustment information is not required in this Proxy Statement because in our view it is not material to our stockholders’ understanding of the information reported in the Pay Versus Performance table above for 2024 or the relationships disclosures provided below.
|  | 2024
|  | Non-PEO NEOs
SCT Total Compensation |  | $1,494,232
Less: Stock Award Value Reported in SCT for the Covered Year |  | $(580,251)
Less: Option Award Value Reported in SCT for the Covered Year |  | -
Plus: Covered Year-End Fair Value for Stock Awards Granted in the Covered Year |  | $531,420
Change in Fair Value (from Prior Year-End to Covered Year-End) of Covered Year-End Outstanding Unvested Stock Awards Granted Prior to Covered Year |  | $(29,358)
Change in Fair Value (from Prior Year-End to Vesting Date) of Stock Awards Granted Prior to Covered Year that Vested in the Covered Year |  | $(22,347)
Fair Value as of the Vesting Date for Stock Awards Granted and Vested in the Covered Year |  | -
Less: Prior Year-End Fair Value of Stock Awards Forfeited in the Covered Year |  | -
Compensation Actually Paid |  | $1,393,696
(7) | A non-GAAP financial measure. See “ Appendix A ” to this Proxy Statement for additional information, including how we define this financial measure and a reconciliation to Net (Loss) Income, the most directly comparable financial measure calculated and presented in accordance with U.S. GAAP. Please see the “ Compensation Discussion and Analysis ” section above for more information about adjusted EBITDA, including how we use it in our executive compensation program.
Company Selected Measure Name | adjusted EBITDA |  |  |  |
Named Executive Officers, Footnote |
(5) | The identity of the non-PEO NEOs for each of 2024, 2023, 2022, 2021 and 2020 (each, a “Covered Year”) are as follows:
Year |  | Non-PEO NEOs
2020 |  | Quinn J. Coburn, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2021 |  | Timothy K. Flanagan, Quinn J. Coburn, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2022 |  | Timothy K. Flanagan, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2023 |  | Catherine Hedoux-Delgado, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
2024 |  | Rory F. O’Donnell, Catherine Hedoux-Delgado, Jeremy S. Halford, Iñigo Perez Ortiz, Gina K. Gunning
Adjustment To PEO Compensation, Footnote |
(2) | “Compensation actually paid” to our CEO in 2024 reflects the respective amount set forth in the table above, adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amount reflected in the table above does not reflect the actual amount of compensation earned by or paid to our CEO during 2024. For information regarding the decisions made by our Human Resources and Compensation Committee in regards to the CEO’s and each of our former CEOs’ compensation for each fiscal year, please see the “Compensation Discussion & Analysis” sections of the proxy statements reporting pay for the fiscal years covered in the table above. Please note that while similar adjustment information was provided in our 2024 proxy statement for Covered Years (as defined below) 2020, 2021, 2022 and 2023, under applicable SEC guidance, repeating such adjustment information is not required in this Proxy Statement because in our view it is not material to our stockholders’ understanding of the information reported in the Pay Versus Performance table above for 2024 or the relationships disclosures provided below.
|  | 2024
|  | Flanagan
SCT Total Compensation |  | $3,023,506
Less: Stock Award Value Reported in SCT for the Covered Year |  | $(1,384,742)
Less: Option Award Value Reported in SCT for the Covered Year |  | —
Plus: Covered Year-End Fair Value for Stock Awards Granted in the Covered Year |  | $829,079
Change in Fair Value (from Prior Year-End to Covered Year-End) of Covered Year-End Outstanding Unvested Stock Awards Granted Prior to Covered Year |  | $(43,817)
Change in Fair Value (from Prior Year-End to Vesting Date) of Stock Awards Granted Prior to Covered Year that Vested in the Covered Year |  | $(30,895)
Fair Value as of the Vesting Date for Stock Awards Granted and Vested in the Covered Year |  | —
Less: Prior Year-End Fair Value of Stock and Option Awards Forfeited in the Covered Year |  | —
Compensation Actually Paid |  | $2,393,131
Non-PEO NEO Average Total Compensation Amount | $ 1,494,232 | $ 1,423,584 | $ 1,538,305 | $ 6,471,272 | $ 1,146,426
Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,393,696 | 727,028 | 1,097,819 | 6,656,296 | 1,248,844
Adjustment to Non-PEO NEO Compensation Footnote |
(6) | Average “compensation actually paid” for our non-PEO NEOs in 2024 reflects the respective amount set forth in the table above, adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amount reflected in the table above does not reflect the actual amount of compensation earned by or paid to our non-PEO NEOs during 2024. For information regarding the decisions made by our Human Resources and Compensation Committee in regards to the non-PEO NEOs’ compensation for each fiscal year, please see the “Compensation Discussion & Analysis” sections of the proxy statements reporting pay for the fiscal years covered in the table above. Please note that while similar adjustment information was provided in our 2024 proxy statement for Covered Years 2020, 2021, 2022 and 2023, under applicable SEC guidance, repeating such adjustment information is not required in this Proxy Statement because in our view it is not material to our stockholders’ understanding of the information reported in the Pay Versus Performance table above for 2024 or the relationships disclosures provided below.
|  | 2024
|  | Non-PEO NEOs
SCT Total Compensation |  | $1,494,232
Less: Stock Award Value Reported in SCT for the Covered Year |  | $(580,251)
Less: Option Award Value Reported in SCT for the Covered Year |  | -
Plus: Covered Year-End Fair Value for Stock Awards Granted in the Covered Year |  | $531,420
Change in Fair Value (from Prior Year-End to Covered Year-End) of Covered Year-End Outstanding Unvested Stock Awards Granted Prior to Covered Year |  | $(29,358)
Change in Fair Value (from Prior Year-End to Vesting Date) of Stock Awards Granted Prior to Covered Year that Vested in the Covered Year |  | $(22,347)
Fair Value as of the Vesting Date for Stock Awards Granted and Vested in the Covered Year |  | -
Less: Prior Year-End Fair Value of Stock Awards Forfeited in the Covered Year |  | -
Compensation Actually Paid |  | $1,393,696
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  |  |  |
Tabular List, Table | Tabular List of Performance Measures Listed below are the performance measures that in our assessment represent the most important performance measures used by us to link compensation actually paid to our named executive officers for 2024 to Company performance.
Performance Measure |  | Nature |  | Explanation
Adjusted EBITDA |  | Financial Measure |  | A non-GAAP financial measure. See “ Appendix A ” to this Proxy Statement for additional information, including how we define this financial measure and a reconciliation to Net (Loss) Income, the most directly comparable financial measure calculated and presented in accordance with U.S. GAAP.
Adjusted Free Cash Flow |  | Financial Measure |  | A non-GAAP financial measure. See “ Appendix A ” to this Proxy Statement for additional information, including how we define this financial measure and a reconciliation to Net Cash (used in) Provided by Operating Activities, the most directly comparable financial measure calculated and presented in accordance with U.S. GAAP.
Relative Total Shareholder Return |  | Financial Measure |  | Our PSUs are based on our relative total shareholder return achievement, with total shareholder return (measured by stock performance price and any dividends reinvested) for us compared against that for a peer group.
Total Shareholder Return Amount | $ 15 | 19 | 42 | 104 | 93
Peer Group Total Shareholder Return Amount | 196 | 238 | 179 | 156 | 121
Net Income (Loss) | $ (131,165,000) | $ (255,250,000) | $ 382,962,000 | $ 388,330,000 | $ 434,374,000
Company Selected Measure Amount | 1,632,000 | 20,484,000 | 536,464,000 | 669,940,000 | 658,946,000
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Adjusted EBITDA |  |  |  |
Non-GAAP Measure Description | A non-GAAP financial measure. See “ Appendix A ” to this Proxy Statement for additional information, including how we define this financial measure and a reconciliation to Net (Loss) Income, the most directly comparable financial measure calculated and presented in accordance with U.S. GAAP. |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Adjusted Free Cash Flow |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Relative Total Shareholder Return |  |  |  |
Flanagan [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount | $ 3,023,506 | $ 1,535,021 |  |  |
PEO Actually Paid Compensation Amount | $ 2,393,131 | 808,453 |  |  |
PEO Name | Mr. Flanagan |  |  |  |
Kessler [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount |  | 3,521,684 | $ 1,407,268 |  |
PEO Actually Paid Compensation Amount |  | $ 674,631 | 1,153,710 |  |
PEO Name | Mr. Kessler |  |  |  |
David J. Rintoul [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount |  |  | 1,406,150 | $ 3,445,257 | $ 2,433,525
PEO Actually Paid Compensation Amount |  |  | $ 1,405,993 | $ 4,377,435 | $ 2,691,429
PEO Name | Mr. David J. Rintoul |  |  |  |
PEO | Flanagan [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 829,079 |  |  |  |
PEO | Flanagan [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (43,817) |  |  |  |
PEO | Flanagan [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Flanagan [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (30,895) |  |  |  |
PEO | Flanagan [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | Flanagan [Member] | Stock Award Values Reported in SCT for the Covered Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (1,384,742) |  |  |  |
PEO | Flanagan [Member] | Option Award Values Reported in SCT for the Covered Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 531,420 |  |  |  |
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (29,358) |  |  |  |
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (22,347) |  |  |  |
Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Non-PEO NEO | Stock Award Values Reported in SCT for the Covered Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (580,251) |  |  |  |
Non-PEO NEO | Option Award Values Reported in SCT for the Covered Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 0 |  |  |  |

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