COMMON UNIT-BASED COMPENSATION PLANS - LTIP Other (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 28, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other information
Cash settlement of grants		$ 21,786
ARLP LTIP
Other information
Unit-based compensation expense		8,300	$ 10,400	$ 9,400
Total unit-based obligation recorded		16,900	$ 19,500
Unrecognized compensation expense (in dollars)		$ 8,800
Weighted-average period for recognition of expense		1 year 6 months
Additional grants authorized (in units)	354,261
Units granted	341,137	455,574	450,125	769,907