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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - OPERATIONS (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest income | $ 2,035 | $ 88 | $ 135
NET INCOME (LOSS) ATTRIBUTABLE TO ARLP | $ 577,190 | $ 178,157 | $ (129,220)
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)
WEIGHTED-AVERAGE NUMBER OF UNITS OUTSTANDING - BASIC (in units) | 127,195,219 | 127,195,219 | 127,164,659
WEIGHTED-AVERAGE NUMBER OF UNITS OUTSTANDING - DILUTED (in units) | 127,195,000 | 127,195,000 | 127,165,000
AHGP as the parent company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest income |  |  | $ 24
Equity in earnings of consolidated subsidiaries | $ 577,190 | $ 178,157 | (129,244)
NET INCOME (LOSS) ATTRIBUTABLE TO ARLP | $ 577,190 | $ 178,157 | $ (129,220)
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)
WEIGHTED-AVERAGE NUMBER OF UNITS OUTSTANDING - BASIC (in units) | 127,195,219 | 127,195,219 | 127,164,659
WEIGHTED-AVERAGE NUMBER OF UNITS OUTSTANDING - DILUTED (in units) | 127,195,219 | 127,195,219 | 127,164,659

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