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COMMON UNIT-BASED COMPENSATION PLANS (Tables) | 9 Months Ended
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Sep. 30, 2024
ARLP LTIP |
COMMON UNIT-BASED COMPENSATION PLANS |
Summary of non-vested share activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of units |  | Weighted average grant date fair value per unit |  | Intrinsic value |
​ | ​ | ​ | ​ | ​ | ​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-vested grants at January 1, 2024 | ​ | 2,710,344 | ​ | $ | 10.91 | ​ | ​ | 51,405 | ​
Granted (1) |  | 455,574 | ​ | ​ | 19.69 | ​ | ​ | ​ | ​
Vested (2) |  | (1,582,422) | ​ |  | 6.53 | ​ | ​ | ​ | ​
Forfeited |  | (38,204) | ​ |  | 16.08 | ​ | ​ | ​ | ​
Non-vested grants at September 30, 2024 |  | 1,545,292 | ​ |  | 17.87 | ​ | ​ | 38,632 | ​
(1) | The restricted units granted during 2024 have certain minimum-value guarantees per unit, regardless of whether the awards vest.
(2) | During the nine months ended September 30, 2024, we issued 936,544 unrestricted common units to the LTIP participants. The remaining vested units were settled in cash to satisfy tax withholding.
SERP and Deferred Compensation Plans |
COMMON UNIT-BASED COMPENSATION PLANS |
Summary of activity in share-based plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of units |  | Weighted average fair value per unit |  | Intrinsic value |
​ | ​ | ​ | ​ | ​ | ​ | ​ | (in thousands) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Phantom units outstanding as of January 1, 2024 | ​ | 811,946 | ​ | $ | 20.44 | ​ | $ | 17,197 | ​
Granted | ​ | 79,695 | ​ | ​ | 21.85 | ​ | ​ | ​ | ​
Settled (1) |  | (96,873) | ​ | ​ | 23.89 | ​ | ​ | ​ | ​
Phantom units outstanding as of September 30, 2024 |  | 794,768 | ​ |  | 20.78 | ​ | ​ | 19,869 | ​
(1) | During the nine months ended September 30, 2024, we purchased 54,152 ARLP common units on the open market to settle the account of a participant under the SERP. Units purchased and delivered to the participant were net of units settled in cash to satisfy tax withholding obligations.
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