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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table | PAY VERSUS PERFORMANCE In accordance with rules adopted by the Securities and Exchange Commission (the “SEC”) pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, we provide the following disclosure regarding executive compensation for our principal executive officer (“PEO”) and the NEOs other than the PEO (“Non-PEO NEOs”) and Company performance for the fiscal years listed below. The information provided under this “Pay Versus Performance” heading is not deemed to be incorporated by reference into any filing of the Company with the SEC, irrespective of any general incorporation language in any such filing.
Year |  | Summary Compensation Table Total for PEO ($)(1) |  | Compensation Actually Paid to PEO ($)(1)(2)(3) |  | Average SCT Total for Non-PEO NEOs ($)(1) |  | Average Compensation Actually Paid to Non-PEO NEOs ($)(1)(2)(3) |  | Value of Initial Fixed $100 Investment Based on: ($)(4) |  | Net Income ($) (in millions) |  | Adjusted EBITDA ($)(5) (in millions)
| TSR |  | Peer Group TSR
2024 |  |  |  | 7,908,650 |  |  |  |  | 10,612,389 |  |  |  |  | 2,629,139 |  |  |  |  | 3,294,325 |  |  |  |  | 287.51 |  |  |  |  | 208.99 |  |  |  |  | 250.6 |  |  |  |  | 447.9 |
2023 |  |  |  | 6,667,795 |  |  |  |  | 13,934,625 |  |  |  |  | 2,261,142 |  |  |  |  | 4,173,766 |  |  |  |  | 318.75 |  |  |  |  | 218.23 |  |  |  |  | 478.6 |  |  |  |  | 698.9 |
2022 |  |  |  | 6,508,776 |  |  |  |  | 11,156,444 |  |  |  |  | 2,363,124 |  |  |  |  | 3,440,123 |  |  |  |  | 175.72 |  |  |  |  | 178.99 |  |  |  |  | 641.3 |  |  |  |  | 994.2 |
2021 |  |  |  | 5,679,932 |  |  |  |  | 5,192,986 |  |  |  |  | 2,087,322 |  |  |  |  | 2,044,041 |  |  |  |  | 124.60 |  |  |  |  | 157.75 |  |  |  |  | 150.9 |  |  |  |  | 457.0 |
2020 |  |  |  | 4,343,999 |  |  |  |  | 4,426,909 |  |  |  |  | 1,612,982 |  |  |  |  | 1,716,748 |  |  |  |  | 102.25 |  |  |  |  | 116.44 |  |  |  |  | (35.8 | ) |  |  |  | 108.3 |
(1) | The PEO for each year was Walter J. Scheller, III. The non-PEO NEOs for each year were Jack K. Richardson (Chief Operating Officer), Dale W. Boyles (Chief Financial Officer), Kelli K. Gant (Chief Administrative Officer and Corporate Secretary), and Charles Lussier (Chief Commercial Officer).
(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 column with certain adjustments as described in footnote 3 below.
(3) | Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs. The amounts excluded or included for 2024 are set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards columns are the amounts from the Stock Awards column set forth in the Summary Compensation Table.
2024 Reconciliation of Summary Compensation Table Total to Compensation Actually Paid |  | Summary Compensation Table Total ($) |  |  | Exclusion of Stock Awards ($) |  |  | Inclusion of Equity Values ($) |  |  | Compensation Actually Paid ($) |
PEO |  |  | 7,908,650 |  |  |  | (4,677,448 | ) |  |  | 7,381,187 |  |  |  | 10,612,389 |
Non-PEO NEOs (average) |  |  | 2,629,139 |  |  |  | (1,246,493 | ) |  |  | 1,911,679 |  |  |  | 3,294,325 |
The amounts in the Inclusion of Equity Values columns in the table above are derived from the amounts set forth in the following table:
Calculation of Equity Values included in Compensation Actually Paid |  | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year ($) |  |  | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards ($) |  |  | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year ($) |  |  | Total- Inclusion of Equity Values ($) |
PEO |  |  | 7,637,074 |  |  |  | (120,457 | ) |  |  | (135,430 | ) |  |  | 7,381,187 |
Non-PEO NEOs (average) |  |  | 1,990,628 |  |  |  | (40,702 | ) |  |  | (38,247 | ) |  |  | 1,911,679 |
(4) | The Peer Group TSR set forth in this table utilizes the S&P Metals and Mining 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 Index, respectively. Historical stock performance is not necessarily indicative of future stock performance.
(5) | 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. See the “Tabular List of Most Important Financial Performance Measures” for a definition of “Adjusted EBITDA” for purposes of this Pay Versus Performance section.
Company Selected Measure Name | Adjusted EBITDA |  |  |  |
Named Executive Officers, Footnote | The non-PEO NEOs for each year were Jack K. Richardson (Chief Operating Officer), Dale W. Boyles (Chief Financial Officer), Kelli K. Gant (Chief Administrative Officer and Corporate Secretary), and Charles Lussier (Chief Commercial Officer). |  |  |  |
Peer Group Issuers, Footnote | The Peer Group TSR set forth in this table utilizes the S&P Metals and Mining 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 Index, respectively. Historical stock performance is not necessarily indicative of future stock performance. |  |  |  |
PEO Total Compensation Amount | $ 7,908,650 | $ 6,667,795 | $ 6,508,776 | $ 5,679,932 | $ 4,343,999
PEO Actually Paid Compensation Amount | $ 10,612,389 | 13,934,625 | 11,156,444 | 5,192,986 | 4,426,909
Adjustment To PEO Compensation, Footnote |
(3) | Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs. The amounts excluded or included for 2024 are set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards columns are the amounts from the Stock Awards column set forth in the Summary Compensation Table.
2024 Reconciliation of Summary Compensation Table Total to Compensation Actually Paid |  | Summary Compensation Table Total ($) |  |  | Exclusion of Stock Awards ($) |  |  | Inclusion of Equity Values ($) |  |  | Compensation Actually Paid ($) |
PEO |  |  | 7,908,650 |  |  |  | (4,677,448 | ) |  |  | 7,381,187 |  |  |  | 10,612,389 |
Non-PEO NEOs (average) |  |  | 2,629,139 |  |  |  | (1,246,493 | ) |  |  | 1,911,679 |  |  |  | 3,294,325 |
The amounts in the Inclusion of Equity Values columns in the table above are derived from the amounts set forth in the following table:
Calculation of Equity Values included in Compensation Actually Paid |  | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year ($) |  |  | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards ($) |  |  | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year ($) |  |  | Total- Inclusion of Equity Values ($) |
PEO |  |  | 7,637,074 |  |  |  | (120,457 | ) |  |  | (135,430 | ) |  |  | 7,381,187 |
Non-PEO NEOs (average) |  |  | 1,990,628 |  |  |  | (40,702 | ) |  |  | (38,247 | ) |  |  | 1,911,679 |
Non-PEO NEO Average Total Compensation Amount | $ 2,629,139 | 2,261,142 | 2,363,124 | 2,087,322 | 1,612,982
Non-PEO NEO Average Compensation Actually Paid Amount | $ 3,294,325 | 4,173,766 | 3,440,123 | 2,044,041 | 1,716,748
Adjustment to Non-PEO NEO Compensation Footnote |
(3) | Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs. The amounts excluded or included for 2024 are set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards columns are the amounts from the Stock Awards column set forth in the Summary Compensation Table.
2024 Reconciliation of Summary Compensation Table Total to Compensation Actually Paid |  | Summary Compensation Table Total ($) |  |  | Exclusion of Stock Awards ($) |  |  | Inclusion of Equity Values ($) |  |  | Compensation Actually Paid ($) |
PEO |  |  | 7,908,650 |  |  |  | (4,677,448 | ) |  |  | 7,381,187 |  |  |  | 10,612,389 |
Non-PEO NEOs (average) |  |  | 2,629,139 |  |  |  | (1,246,493 | ) |  |  | 1,911,679 |  |  |  | 3,294,325 |
The amounts in the Inclusion of Equity Values columns in the table above are derived from the amounts set forth in the following table:
Calculation of Equity Values included in Compensation Actually Paid |  | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year ($) |  |  | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards ($) |  |  | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year ($) |  |  | Total- Inclusion of Equity Values ($) |
PEO |  |  | 7,637,074 |  |  |  | (120,457 | ) |  |  | (135,430 | ) |  |  | 7,381,187 |
Non-PEO NEOs (average) |  |  | 1,990,628 |  |  |  | (40,702 | ) |  |  | (38,247 | ) |  |  | 1,911,679 |
Compensation Actually Paid vs. Total Shareholder Return | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid, Company TSR and Peer Group 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, the Company’s cumulative TSR over the five most recently completed fiscal years, and the S&P Metals & Mining Index TSR over the same period. PEO and Average Non-PEO NEO Compensation Actually Paid Versus TSR |  |  |  |
Compensation Actually Paid vs. Net Income | 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 PEO, the average of Compensation Actually Paid to our Non-PEO NEOs, and our Net Income during the five most recently completed fiscal years. PEO and Average Non-PEO NEO Compensation Actually Paid Versus Net Income |  |  |  |
Compensation Actually Paid vs. Company Selected Measure | 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 PEO, the average of Compensation Actually Paid to our Non-PEO NEOs, and our Adjusted EBITDA during the five most recently completed fiscal years. PEO and Average Non-PEO NEO Compensation Actually Paid Versus Adjusted EBITDA |  |  |  |
Total Shareholder Return Vs Peer Group | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid, Company TSR and Peer Group 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, the Company’s cumulative TSR over the five most recently completed fiscal years, and the S&P Metals & Mining Index TSR over the same period. PEO and Average Non-PEO NEO Compensation Actually Paid Versus TSR |  |  |  |
Tabular List, Table | Tabular List of Most Important Financial and Non-Financial Performance Measures The following table presents the financial and non-financial performance measures that the Company considers to have been the most important in linking Compensation Actually Paid to our PEO and the Non-PEO NEOs for 2024 to Company performance. The measures in this table are not ranked.
Performance Measure |  | Rationale for Use in the Company’s Incentive Compensation Program |  | Definition
Adjusted EBITDA |  | Adjusted EBITDA is used as a supplemental financial measure by management and by external users of our financial statements, such as investors, industry analysts, lenders and ratings agencies, to assess: (i) our operating performance as compared to the operating performance of other companies in the coal industry, without regard to financing methods, historical cost basis or capital structure; and (ii) the viability of acquisitions and other capital expenditure projects and the returns on investment of various investment opportunities, such as Blue Creek. |  | “Adjusted EBITDA” is a non-GAAP financial measure and is defined as net income before net interest income, income tax expense, depreciation and depletion, non-cash asset retirement obligation accretion and valuation adjustments, non-cash stock compensation expense, other non-cash accretion and valuation adjustments, non-cash mark-to-market loss on gas hedges, and business interruption expenses. For purposes of the Company’s compensation program, Adjusted EBITDA is further adjusted to remove the impact of the earned incentive payments.
Capital expenditures |  | This metric reflects management’s focus on operational efficiency. |  | Money spent by the Company on acquiring fixed assets, such as machinery and equipment
Cash cost of production per metric ton |  | This metric reflects management’s focus on our key business strategy of maintaining and further improving our low-cost operating profile. |  | Represents production costs divided by metric tons produced
Continuous miner feet of advance |  | This metric reflects management’s focus on operational efficiency. |  | Represents the number of feet the continuous miner advances during a period
Longwall feet of advance |  | This metric reflects management’s focus on operational efficiency. |  | Represents the number of feet the longwall advances during a period
Metrics tons of production |  | This metric reflects management’s focus on maximizing profitable production. |  | Metric tons of metallurgical coal produced from Mine 4, Mine 7 and Blue Creek
Safety rate |  | Our dedication to safety is at the core of all of our overall operations as we work to further reduce workplace incidents by focusing on policy awareness and accident prevention. |  | Total reportable incident rate (TRIR)
Total Shareholder Return Amount | $ 287.51 | 318.75 | 175.72 | 124.6 | 102.25
Peer Group Total Shareholder Return Amount | 208.99 | 218.23 | 178.99 | 157.75 | 116.44
Net Income (Loss) | $ 250,600,000 | $ 478,600,000 | $ 641,300,000 | $ 150,900,000 | $ (35,800,000)
Company Selected Measure Amount | 447,900,000 | 698,900,000 | 994,200,000 | 457,000,000 | 108,300,000
PEO Name | J. Scheller, III |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Adjusted EBITDA |  |  |  |
Non-GAAP Measure Description | “Adjusted EBITDA” is a non-GAAP financial measure and is defined as net income before net interest income, income tax expense, depreciation and depletion, non-cash asset retirement obligation accretion and valuation adjustments, non-cash stock compensation expense, other non-cash accretion and valuation adjustments, non-cash mark-to-market loss on gas hedges, and business interruption expenses. For purposes of the Company’s compensation program, Adjusted EBITDA is further adjusted to remove the impact of the earned incentive payments. |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Capital expenditures |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Cash cost of production per metric ton |  |  |  |
Measure:: 4 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Continuous miner feet of advance |  |  |  |
Measure:: 5 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Longwall feet of advance |  |  |  |
Measure:: 6 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Metrics tons of production |  |  |  |
Measure:: 7 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Safety rate |  |  |  |
PEO | Equity Awards Adjustments |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 7,381,187 |  |  |  |
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 7,637,074 |  |  |  |
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (135,430) |  |  |  |
PEO | 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 | (120,457) |  |  |  |
PEO | Exclusion of Stock Awards [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (4,677,448) |  |  |  |
Non-PEO NEO | Equity Awards Adjustments |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,911,679 |  |  |  |
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 | 1,990,628 |  |  |  |
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (38,247) |  |  |  |
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 | (40,702) |  |  |  |
Non-PEO NEO | Exclusion of Stock Awards [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ (1,246,493) |  |  |  |

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