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EARNINGS PER LIMITED PARTNER UNIT - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
EARNINGS PER LIMITED PARTNER UNIT |  |  |
Net income (loss) attributable to ARLP | $ 577,190 | $ 178,157 | $ (129,220)
Distributions to participating securities | (8,527) | (2,334) |
Undistributed earnings attributable to participating securities | (10,576) | (2,403) |
Net income (loss) attributable to ARLP available to limited partners | $ 558,087 | $ 173,420 | $ (129,220)
Weighted-average limited partner units outstanding - basic (in units) | 127,195,219 | 127,195,219 | 127,164,659
Weighted-average limited partner units outstanding - diluted (in units) | 127,195,000 | 127,195,000 | 127,165,000
Earnings per limited partner unit - basic (in dollars per unit) | $ 4.39 | $ 1.36 | $ (1.02)
Earnings per limited partner unit - diluted (in dollars per unit) | $ 4.39 | $ 1.36 | $ (1.02)
Anti-dilutive under the treasury stock method (in units) | 3,540,385 | 1,967,672 | 773,664

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