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