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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 |
|  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On:4 |  |
Year | Summary Compensation Table Total for Glenn L. Kellow 1 ($) | Compensation Actually Paid to Glenn L. Kellow 1,2,3 ($) | Summary Compensation Table Total for James C. Grech 1 ($) | Compensation Actually Paid to James C. Grech 1,2,3 ($) | Average Summary Compensation Table Total for Non-PEO NEOs 1 ($) | Average Compensation Actually Paid to Non-PEO NEOs 1,2,3 ($) | TSR ($) | Peer Group TSR ($)4 | Net Income ($)5 | Adjusted EBITDA 6 ($)
2024 | $ | — |  | $ | — |  | 6,972,467 | 7,275,899 | 2,510,874 | 2,590,603 | 234.77 | 208.99 | 403,500,000 | 871,700,000
2023 | $ | — |  | $ | — |  | 5,879,892 | 4,805,574 | 2,630,479 | 2,504,778 | 269.27 | 218.23 | 815,600,000 | 1,363,900,000
2022 | $ | — |  | $ | — |  | 3,811,296 | 8,016,084 | 2,172,769 | 4,353,640 | 289.69 | 178.99 | 1,319,100,000 | 1,844,700,000
2021 | 8,753,812 | 11,945,403 | 4,239,272 | 4,777,733 | 2,195,035 | 3,284,553 | 110.42 | 157.75 | 371,400,000 | 916,700,000
2020 | 6,352,911 | (795,179) | $ | — |  | $ | — |  | 1,751,662 | 719,821 | 26.43 | 116.44 | (1,873,800,000) | 258,800,000
Company Selected Measure Name | Adjusted EBITDA |  |  |  |
Named Executive Officers, Footnote | (1)Glenn L. Kellow was our PEO from May 2015 to June 2021. James C. Grech was our PEO from June 2021 to present. The individuals comprising the Non-PEO NEOs for each year presented are listed below.
2020 | 2021 | 2022 | 2023 | 2024
Mark A. Spurbeck | Mark A. Spurbeck | Mark A. Spurbeck | Mark A. Spurbeck | Mark A. Spurbeck
Darren R. Yeates | Darren R. Yeates | Darren R. Yeates | Darren R. Yeates | Darren R. Yeates
Marc E. Hathhorn | Marc E. Hathhorn | Marc E. Hathhorn | Marc E. Hathhorn | Scott T. Jarboe
Kemal Williamson | Scott T. Jarboe | Scott T. Jarboe | Scott T. Jarboe | Patrick J. Forkin III
Amy B. Schwetz | Kemal Williamson |  |  | Marc E. Hathhorn
Charles F. Meintjes |  |  |  |
Peer Group Issuers, Footnote | (4)The Peer Group TSR set forth in this table utilizes the S&P Metals and Mining Select Industry Index, which we also utilize in the stock performance graph required by Item 201(e) of Regulation S-K included in our Annual Report for the year ended December 31, 2024. The comparison assumes $100 was invested for the period starting December 31, 2019, through the end of the listed year in the Company and in the S&P Metals and Mining Select Industry Index, respectively. Historical stock performance is not necessarily indicative of future stock performance. |  |  |  |
Adjustment To PEO Compensation, Footnote | Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEOs and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards column are the totals from the Stock Awards column set forth in the Summary Compensation Table.
Year | Summary Compensation Table Total for James C. Grech ($) | Exclusion of Stock Awards for James C. Grech ($) | Inclusion of Equity Values for James C. Grech ($) | Compensation Actually Paid to James C. Grech ($)
2024 | 6,972,467 | (3,732,274) | 4,035,706 | 7,275,899
Year | Average Summary Compensation Table Total for Non-PEO NEOs ($) | Average Exclusion of Stock Awards for Non-PEO NEOs ($) | Average Inclusion of Equity Values for Non-PEO NEOs ($) | Average Compensation Actually Paid to Non-PEO NEOs ($)
2024 | 2,510,874 | (1,064,864) | 1,144,593 | 2,590,603
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
Year | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for James C. Grech ($) | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for James C. Grech ($) | Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for James C. Grech ($) | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for James C. Grech ($) | Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for James C. Grech ($) | Total - Inclusion of Equity Values for James C. Grech ($)
2024 | 3,916,102 | 28,919 | $ | — |  | 90,685 | $ | — |  | 4,035,706
Year | Average Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for Non-PEO NEOs ($) | Average Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for Non-PEO NEOs ($) | Average Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for Non-PEO NEOs ($) | Average Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for Non-PEO NEOs ($) | Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for Non-PEO NEOs ($) | Average Total - Inclusion of Equity Values for Non-PEO NEOs ($)
2024 | 1,120,041 | 8,936 | $ | — |  | 15,616 | $ | — |  | 1,144,593
Non-PEO NEO Average Total Compensation Amount | $ 2,510,874 | $ 2,630,479 | $ 2,172,769 | $ 2,195,035 | $ 1,751,662
Non-PEO NEO Average Compensation Actually Paid Amount | $ 2,590,603 | 2,504,778 | 4,353,640 | 3,284,553 | 719,821
Adjustment to Non-PEO NEO Compensation Footnote | Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEOs and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards column are the totals from the Stock Awards column set forth in the Summary Compensation Table.
Year | Summary Compensation Table Total for James C. Grech ($) | Exclusion of Stock Awards for James C. Grech ($) | Inclusion of Equity Values for James C. Grech ($) | Compensation Actually Paid to James C. Grech ($)
2024 | 6,972,467 | (3,732,274) | 4,035,706 | 7,275,899
Year | Average Summary Compensation Table Total for Non-PEO NEOs ($) | Average Exclusion of Stock Awards for Non-PEO NEOs ($) | Average Inclusion of Equity Values for Non-PEO NEOs ($) | Average Compensation Actually Paid to Non-PEO NEOs ($)
2024 | 2,510,874 | (1,064,864) | 1,144,593 | 2,590,603
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
Year | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for James C. Grech ($) | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for James C. Grech ($) | Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for James C. Grech ($) | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for James C. Grech ($) | Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for James C. Grech ($) | Total - Inclusion of Equity Values for James C. Grech ($)
2024 | 3,916,102 | 28,919 | $ | — |  | 90,685 | $ | — |  | 4,035,706
Year | Average Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for Non-PEO NEOs ($) | Average Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for Non-PEO NEOs ($) | Average Vesting-Date Fair Value of Equity Awards Granted During Year that Vested During Year for Non-PEO NEOs ($) | Average Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for Non-PEO NEOs ($) | Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for Non-PEO NEOs ($) | Average Total - Inclusion of Equity Values for Non-PEO NEOs ($)
2024 | 1,120,041 | 8,936 | $ | — |  | 15,616 | $ | — |  | 1,144,593
Compensation Actually Paid vs. Total Shareholder Return | Description of Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Total Shareholder Return (“TSR”) The following chart sets forth the relationship between Compensation Actually Paid to our PEO, the average of Compensation Actually Paid to our Non-PEO NEOs and the cumulative TSR over the five most recently completed fiscal years for the Company and the Peer Group TSR. |  |  |  |
Compensation Actually Paid vs. Net Income | Description of Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Net Income The following chart sets forth the relationship between Compensation Actually Paid to our PEOs, the average of Compensation Actually Paid to our Non-PEO NEOs and our net income during the five most recently completed fiscal years. |  |  |  |
Compensation Actually Paid vs. Company Selected Measure | Description of Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Adjusted EBITDA The following chart sets forth the relationship between Compensation Actually Paid to our PEOs, the average of Compensation Actually Paid to our Non-PEO NEOs and our Adjusted EBITDA during the five most recently completed fiscal years. This non-GAAP measure is defined and reconciled to the nearest GAAP measure in Appendix B. |  |  |  |
Total Shareholder Return Vs Peer Group | Description of Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Total Shareholder Return (“TSR”) The following chart sets forth the relationship between Compensation Actually Paid to our PEO, the average of Compensation Actually Paid to our Non-PEO NEOs and the cumulative TSR over the five most recently completed fiscal years for the Company and the Peer Group TSR. |  |  |  |
Tabular List, Table |
Free Cash Flow
Production Volume
Environmental Reclamation
Adjusted EBITDA
Clean Cash Cost Per Ton
TRIFR
Safety & Sustainability MS
Total Shareholder Return Amount | $ 234.77 | 269.27 | 289.69 | 110.42 | 26.43
Peer Group Total Shareholder Return Amount | 208.99 | 218.23 | 178.99 | 157.75 | 116.44
Net Income (Loss) | $ 403,500,000 | $ 815,600,000 | $ 1,319,100,000 | $ 371,400,000 | $ (1,873,800,000)
Company Selected Measure Amount | 871,700,000 | 1,363,900,000 | 1,844,700,000 | 916,700,000 | 258,800,000
Additional 402(v) Disclosure | (2)The amounts shown for Compensation Actually Paid have been calculated in accordance with Item 402(v) of Regulation S-K and do not reflect compensation actually earned, realized, or received by the Company’s NEOs. These amounts reflect the Summary Compensation Table Total with certain adjustments as described in footnote 3 below. (5)The 2024 Proxy Statement reflected net income of $759,600,000. The 2025 Proxy Statement has been updated to reflect actual net income of $815,600,000. |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Free Cash Flow |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Production Volume |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Environmental Reclamation |  |  |  |
Measure:: 4 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Adjusted EBITDA |  |  |  |
Non-GAAP Measure Description | (6)We determined Adjusted EBITDA to be the most important financial performance measure used to link Company performance to Compensation Actually Paid to our PEO and Non-PEO NEOs in 2024. This performance measure may not have been the most important financial performance measure in prior years and we may determine a different financial performance measure to be the most important financial performance measure in future years. Adjusted EBITDA is a non-GAAP measure and is defined and reconciled to the nearest GAAP measure in Appendix B to this proxy statement. |  |  |  |
Measure:: 5 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Clean Cash Cost Per Ton |  |  |  |
Measure:: 6 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | TRIFR |  |  |  |
Measure:: 7 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Safety & Sustainability MS |  |  |  |
James C. Grech [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount | $ 6,972,467 | $ 5,879,892 | $ 3,811,296 | $ 4,239,272 |
PEO Actually Paid Compensation Amount | 7,275,899 | $ 4,805,574 | 8,016,084 | 4,777,733 |
PEO Name |  | James C. Grech |  |  |
Glenn L. Kellow [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount |  |  | 0 | 8,753,812 | $ 6,352,911
PEO Actually Paid Compensation Amount |  |  | $ 0 | $ 11,945,403 | $ (795,179)
PEO Name |  |  |  |  | Glenn L. Kellow
PEO | James C. Grech [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (3,732,274) |  |  |  |
PEO | James C. Grech [Member] | Equity Awards Adjustments, Excluding Value Reported in Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 4,035,706 |  |  |  |
PEO | James C. Grech [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 | 3,916,102 |  |  |  |
PEO | James C. Grech [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 | 28,919 |  |  |  |
PEO | James C. Grech [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
PEO | James C. Grech [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 | 90,685 |  |  |  |
PEO | James C. Grech [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 |  |  |  |
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (1,064,864) |  |  |  |
Non-PEO NEO | Equity Awards Adjustments, Excluding Value Reported in Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,144,593 |  |  |  |
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 | 1,120,041 |  |  |  |
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 | 8,936 |  |  |  |
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 | 15,616 |  |  |  |
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 |  |  |  |

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