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RELATED-PARTY TRANSACTIONS (Tables) | 12 Months Ended
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Dec. 31, 2019
RELATED-PARTY TRANSACTIONS |
Summary of advanced royalties outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | WKY CoalPlay | ​ | ​ | ​
​ | ​ | ​ | ​ | Towhead | ​ | Webster | ​ | Henderson | ​ | WKY | ​ | ​ | ​
​ | ​ | SGP/Craft Foundations | ​ | Coal | ​ | Coal | ​ | Coal | ​ | CoalPlay | ​ | ​ | ​
​ | ​ | ​ | ​ | Henderson | ​ | ​ | ​ | ​ | ​ | Henderson | ​ | ​ | ​ | ​
​ | ​ | Tunnel | ​ | & Union | ​ | Webster | ​ | Henderson | ​ | & Union | ​ | ​ | ​ | ​
​ | ​ | Ridge | ​ | Counties, KY | ​ | County, KY | ​ | County, KY | ​ | Counties, KY | ​ | Total | ​
​ | ​ | Acquired | ​ | Acquired | ​ | Acquired | ​ | Acquired | ​ | Acquired | ​ | ​ | ​ | ​
​ | ​ | 2005 | ​ | December 2014 | ​ | December 2014 | ​ | December 2014 | ​ | February 2015 | ​ | ​ | ​ | ​
​ | (in thousands) | ​
As of January 1, 2017 | ​ | ​ | — | ​ | ​ | 7,195 | ​ | ​ | 3,319 | ​ | ​ | 5,044 | ​ | ​ | 4,262 | ​ | ​ | 19,820 | ​
Payments | ​ | ​ | 6,000 | ​ | ​ | 3,598 | ​ | ​ | 2,568 | ​ | ​ | 2,522 | ​ | ​ | 2,131 | ​ | ​ | 16,819 | ​
Recoupment | ​ | ​ | (3,000) | ​ | ​ | (109) | ​ | ​ | (531) | ​ | ​ | — | ​ | ​ | (6) | ​ | ​ | (3,646) | ​
As of December 31, 2017 | ​ | ​ | 3,000 | ​ | ​ | 10,684 | ​ | ​ | 5,356 | ​ | ​ | 7,566 | ​ | ​ | 6,387 | ​ | ​ | 32,993 | ​
Payments | ​ | ​ | — | ​ | ​ | 3,597 | ​ | ​ | 2,570 | ​ | ​ | 2,520 | ​ | ​ | 2,131 | ​ | ​ | 10,818 | ​
Recoupment | ​ | ​ | (3,000) | ​ | ​ | (204) | ​ | ​ | (31) | ​ | ​ | — | ​ | ​ | (36) | ​ | ​ | (3,271) | ​
Unrecoupable | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7,895) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7,895) | ​
As of December 31, 2018 | ​ | ​ | — | ​ | ​ | 14,077 | ​ | ​ | — | ​ | ​ | 10,086 | ​ | ​ | 8,482 | ​ | ​ | 32,645 | ​
Payments | ​ | ​ | 4,500 | ​ | ​ | 3,597 | ​ | ​ | 2,568 | ​ | ​ | 2,521 | ​ | ​ | 2,131 | ​ | ​ | 15,317 | ​
Recoupment | ​ | ​ | (3,000) | ​ | ​ | (1,071) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (107) | ​ | ​ | (4,178) | ​
Unrecoupable | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,568) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,568) | ​
As of December 31, 2019 | ​ | ​ | 1,500 | ​ | ​ | 16,603 | ​ | ​ | — | ​ | ​ | 12,607 | ​ | ​ | 10,506 | ​ | ​ | 41,216 | ​

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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