IMPAIRMENT OF COAL PROPERTIES (Details) $ in Thousands, T in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($) T	Dec. 31, 2024 USD ($) T	Dec. 31, 2023 USD ($)
Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Line Items]
Impairment charge | $	$ 215,100	$ 215,136	$ 0
Level 3
Defined Benefit Plan, Plan Assets, Level 3 Reconciliation [Line Items]
Discount rate		11.50%
Production capacity | T	3.6	3.6