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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Reportable segment results |  |  |
Revenues | $ 1,961,720 | $ 2,002,857 | $ 1,796,220
Segment Adjusted EBITDA Expense | 1,204,896 | 1,211,800 | 1,092,187
Segment Adjusted EBITDA | 672,001 | 715,691 | 682,028
Total assets | 2,586,694 | 2,394,748 | 2,219,371
Capital expenditures | 305,858 | 233,480 | 145,088
Illinois Basin |  |  |
Reportable segment results |  |  |
Revenues | 1,236,308 | 1,321,089 | 1,125,864
Segment Adjusted EBITDA Expense | 756,423 | 796,370 | 692,199
Segment Adjusted EBITDA | 385,200 | 417,773 | 398,080
Total assets | 1,373,516 | 1,380,912 | 1,437,627
Capital expenditures | 189,270 | 166,468 | 94,374
Appalachia |  |  |
Reportable segment results |  |  |
Revenues | 644,389 | 643,965 | 626,041
Segment Adjusted EBITDA Expense | 423,623 | 398,243 | 385,802
Segment Adjusted EBITDA | 215,950 | 240,286 | 234,124
Total assets | 500,027 | 440,518 | 470,892
Capital expenditures | 111,739 | 64,037 | 48,358
Minerals |  |  |
Reportable segment results |  |  |
Revenues | 53,036 |  |
Segment Adjusted EBITDA Expense | 7,811 |  |
Segment Adjusted EBITDA | 46,997 | 21,323 | 13,297
Total assets | 643,213 | 161,312 | 147,970
Other and Corporate |  |  |
Reportable segment results |  |  |
Revenues | 56,850 | 81,492 | 114,749
Segment Adjusted EBITDA Expense | 36,845 | 52,321 | 75,851
Segment Adjusted EBITDA | 32,911 | 44,864 | 45,296
Total assets | 541,261 | 589,010 | 349,918
Capital expenditures | 4,849 | 2,975 | 2,356
Operating segments |  |  |
Reportable segment results |  |  |
Revenues | 1,961,720 | 2,002,857 | 1,796,220
Operating segments | Illinois Basin |  |  |
Reportable segment results |  |  |
Revenues | 1,219,618 | 1,289,898 | 1,069,767
Operating segments | Appalachia |  |  |
Reportable segment results |  |  |
Revenues | 644,389 | 643,898 | 623,720
Operating segments | Minerals |  |  |
Reportable segment results |  |  |
Revenues | 53,036 |  |
Operating segments | Other and Corporate |  |  |
Reportable segment results |  |  |
Revenues | 44,677 | 69,061 | 102,733
Elimination |  |  |
Reportable segment results |  |  |
Revenues | (28,863) | (43,689) | (70,434)
Segment Adjusted EBITDA Expense | (19,806) | (35,134) | (61,665)
Segment Adjusted EBITDA | (9,057) | (8,555) | (8,769)
Total assets | (471,323) | (177,004) | (187,036)
Elimination | Illinois Basin |  |  |
Reportable segment results |  |  |
Revenues | 16,690 | 31,191 | 56,097
Elimination | Appalachia |  |  |
Reportable segment results |  |  |
Revenues |  | 67 | 2,321
Elimination | Other and Corporate |  |  |
Reportable segment results |  |  |
Revenues | $ 12,173 | $ 12,431 | $ 12,016

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