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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 3 Months Ended
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Mar. 31, 2021
REVENUE FROM CONTRACTS WITH CUSTOMERS |
Schedule of disaggregation of revenues by type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Coal Operations | ​ | Royalties | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Illinois |  | ​ |  | ​ | ​ | ​ |  | Other and |  | ​ |  | ​ | ​ | ​
​ |  | Basin |  | Appalachia |  | Oil & Gas |  | Coal |  | Corporate |  | Elimination |  | Consolidated | ​
​ | ​ | (in thousands) | ​
Three Months Ended March 31, 2021 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Coal sales | ​ | $ | 182,641 | ​ | $ | 104,846 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 287,487 | ​
Oil & gas royalties | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 13,999 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 13,999 | ​
Coal royalties | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11,301 | ​ | ​ | — | ​ | ​ | (11,301) | ​ | ​ | — | ​
Transportation revenues | ​ | ​ | 7,680 | ​ | ​ | 3,388 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11,068 | ​
Other revenues | ​ | ​ | 613 | ​ | ​ | 385 | ​ | ​ | 21 | ​ | ​ | — | ​ | ​ | 7,768 | ​ | ​ | (2,719) | ​ | ​ | 6,068 | ​
Total revenues | ​ | $ | 190,934 | ​ | $ | 108,619 | ​ | $ | 14,020 | ​ | $ | 11,301 | ​ | $ | 7,768 | ​ | $ | (14,020) | ​ | $ | 318,622 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended March 31, 2020 | ​
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Coal sales | ​ | $ | 199,098 | ​ | $ | 115,539 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 314,637 | ​
Oil & gas royalties | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 14,239 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 14,239 | ​
Coal royalties | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11,371 | ​ | ​ | — | ​ | ​ | (11,371) | ​ | ​ | — | ​
Transportation revenues | ​ | ​ | 3,856 | ​ | ​ | 883 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,739 | ​
Other revenues | ​ | ​ | 918 | ​ | ​ | 11,681 | ​ | ​ | 24 | ​ | ​ | 5 | ​ | ​ | 7,379 | ​ | ​ | (2,859) | ​ | ​ | 17,148 | ​
Total revenues | ​ | $ | 203,872 | ​ | $ | 128,103 | ​ | $ | 14,263 | ​ | $ | 11,376 | ​ | $ | 7,379 | ​ | $ | (14,230) | ​ | $ | 350,763 | ​
Schedule of current coal supply contracts allocated to performance obligations that are unsatisfied or partially unsatisfied |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2024 and | ​ | ​ | ​
​ |  | 2021 |  | 2022 |  | 2023 |  | Thereafter |  | Total | ​
​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Illinois Basin Coal Operations coal revenues | ​ | $ | 568,438 | ​ | $ | 329,389 | ​ | $ | 228,120 | ​ | $ | 181,250 | ​ | $ | 1,307,197 | ​
Appalachia Coal Operations coal revenues | ​ | ​ | 265,808 | ​ | ​ | 142,099 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 407,907 | ​
Total coal revenues (1) | ​ | $ | 834,246 | ​ | $ | 471,488 | ​ | $ | 228,120 | ​ | $ | 181,250 | ​ | $ | 1,715,104 | ​
(1) Coal revenues generally consists of consolidated revenues excluding our Oil & Gas Royalties segment as well as intercompany revenues from our Coal Royalties segment.

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