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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reportable segment results |  |  |
Revenues | $ 2,566,701 | $ 2,419,967 | $ 1,579,230
Segment Adjusted EBITDA Expense | 1,404,718 | 1,283,878 | 953,757
Segment Adjusted EBITDA | 1,012,173 | 1,032,569 | 557,398
Total assets | 2,788,426 | 2,728,021 | 2,227,481
Capital expenditures | 379,338 | 286,394 | 122,984
Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 76,450 | 52,818 | 38,517
Coal Royalties |  |  |
Reportable segment results |  |  |
Revenues | 65,614 | 60,680 | 51,471
Operating segments |  |  |
Reportable segment results |  |  |
Revenues | 2,566,701 |  |
Operating segments | Illinois Basin Coal |  |  |
Reportable segment results |  |  |
Revenues | 1,481,556 | 1,296,305 | 919,597
Segment Adjusted EBITDA Expense | 861,288 | 806,080 | 613,303
Segment Adjusted EBITDA | 514,118 | 420,684 | 265,292
Total assets | 966,102 | 779,018 | 676,091
Capital expenditures | 257,885 | 158,624 | 60,166
Operating segments | Illinois Basin Coal | Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 10,505 | 6,822 | 4,666
Operating segments | Appalachia Coal |  |  |
Reportable segment results |  |  |
Revenues | 883,334 | 928,087 | 545,539
Segment Adjusted EBITDA Expense | 516,471 | 464,029 | 344,332
Segment Adjusted EBITDA | 330,723 | 426,402 | 172,601
Total assets | 488,427 | 431,913 | 420,144
Capital expenditures | 116,217 | 76,603 | 47,577
Operating segments | Appalachia Coal | Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 1,885 | 1,481 | 3,940
Operating segments | Oil & Gas Royalties |  |  |
Reportable segment results |  |  |
Revenues | 141,525 | 154,897 | 86,439
Segment Adjusted EBITDA Expense | 16,532 | 15,395 | 11,051
Segment Adjusted EBITDA | 121,508 | 143,179 | 76,920
Total assets | 781,184 | 778,465 | 698,702
Operating segments | Oil & Gas Royalties | Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 3,774 | 3,837 | 2,256
Operating segments | Coal Royalties |  |  |
Reportable segment results |  |  |
Revenues | 42 | 56 | 69
Segment Adjusted EBITDA Expense | 24,451 | 21,871 | 18,269
Segment Adjusted EBITDA | 41,163 | 38,809 | 33,202
Total assets | 315,592 | 321,587 | 285,943
Capital expenditures | 400 | 38,276 | 45
Operating segments | Coal Royalties | Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 42 | 56 | 69
Other, Corporate and Elimination |  |  |
Reportable segment results |  |  |
Revenues | (5,328) | (20,002) | (23,816)
Segment Adjusted EBITDA Expense | (14,024) | (23,497) | (33,198)
Segment Adjusted EBITDA | 4,661 | 3,495 | 9,383
Total assets | 237,121 | 417,038 | 146,601
Capital expenditures | 4,836 | 12,891 | 15,196
Other, Corporate and Elimination | Other revenues |  |  |
Reportable segment results |  |  |
Revenues | 60,244 | 40,622 | 27,586
Elimination |  |  |
Reportable segment results |  |  |
Revenues | (65,572) | (60,624) | (51,402)
Elimination | Coal Royalties |  |  |
Reportable segment results |  |  |
Revenues | $ 65,572 | $ 60,624 | $ 51,402

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