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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 12 Months Ended
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Dec. 31, 2019
REVENUE FROM CONTRACTS WITH CUSTOMERS |
Schedule of disaggregation of revenues by type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Illinois |  | ​ |  | ​ |  | Other and |  | ​ |  | ​ | ​ | ​
​ |  | Basin |  | Appalachia |  | Minerals |  | Corporate |  | Elimination |  | Consolidated | ​
​ | ​ | (in thousands) | ​
Year Ended December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Coal sales | ​ | $ | 1,128,588 | ​ | $ | 628,406 | ​ | $ | — | ​ | $ | 22,138 | ​ | $ | (16,690) | ​ | $ | 1,762,442 | ​
Oil & gas royalties | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 51,735 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 51,735 | ​
Transportation revenues | ​ | ​ | 94,686 | ​ | ​ | 4,817 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 99,503 | ​
Other revenues | ​ | ​ | 13,034 | ​ | ​ | 11,166 | ​ | ​ | 1,301 | ​ | ​ | 34,712 | ​ | ​ | (12,173) | ​ | ​ | 48,040 | ​
Total revenues | ​ | $ | 1,236,308 | ​ | $ | 644,389 | ​ | $ | 53,036 | ​ | $ | 56,850 | ​ | $ | (28,863) | ​ | $ | 1,961,720 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year Ended December 31, 2018 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Coal sales | ​ | $ | 1,197,143 | ​ | $ | 635,530 | ​ | $ | — | ​ | $ | 43,393 | ​ | $ | (31,258) | ​ | $ | 1,844,808 | ​
Transportation revenues | ​ | ​ | 106,947 | ​ | ​ | 5,435 | ​ | ​ | — | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | 112,385 | ​
Other revenues | ​ | ​ | 16,999 | ​ | ​ | 3,000 | ​ | ​ | — | ​ | ​ | 38,096 | ​ | ​ | (12,431) | ​ | ​ | 45,664 | ​
Total revenues | ​ | $ | 1,321,089 | ​ | $ | 643,965 | ​ | $ | — | ​ | $ | 81,492 | ​ | $ | (43,689) | ​ | $ | 2,002,857 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year Ended December 31, 2017 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Coal sales | ​ | $ | 1,078,255 | ​ | $ | 616,305 | ​ | $ | — | ​ | $ | 74,973 | ​ | $ | (58,419) | ​ | $ | 1,711,114 | ​
Transportation revenues | ​ | ​ | 35,585 | ​ | ​ | 6,115 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 41,700 | ​
Other revenues | ​ | ​ | 12,024 | ​ | ​ | 3,621 | ​ | ​ | — | ​ | ​ | 39,776 | ​ | ​ | (12,015) | ​ | ​ | 43,406 | ​
Total revenues | ​ | $ | 1,125,864 | ​ | $ | 626,041 | ​ | $ | — | ​ | $ | 114,749 | ​ | $ | (70,434) | ​ | $ | 1,796,220 | ​
Schedule of current coal supply contracts allocated to performance obligations that are unsatisfied or partially unsatisfied |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2023 and | ​ | ​ | ​
​ |  | 2020 |  | 2021 |  | 2022 |  | Thereafter |  | Total |
​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Illinois Basin coal revenues | ​ | $ | 849,040 | ​ | $ | 437,808 | ​ | $ | 34,414 | ​ | $ | 8,470 | ​ | $ | 1,329,732 | ​
Appalachia coal revenues | ​ | ​ | 426,162 | ​ | ​ | 97,729 | ​ | ​ | 54,132 | ​ | ​ | — | ​ | ​ | 578,023 | ​
Total coal revenues (1) | ​ | $ | 1,275,202 | ​ | $ | 535,537 | ​ | $ | 88,546 | ​ | $ | 8,470 | ​ | $ | 1,907,755 | ​
(1) Coal revenues generally consists of consolidated revenues excluding our Minerals segment.

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