COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) dth	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]		Environmental liabilities
Environmental liabilities		$ 30,432	$ 29,866
Environmental liability related to landfill, period		30 years
Annual inflation rate on environmental liability related to landfill (as percent)		2.30%
Purchase commitment, energy volume required per day (in dekatherm) | dth	15,000,000
Purchase commitment per month	$ 200
Purchase commitment, termination notice period (in months)	12 months
Purchase commitment period (in years)	10 years
Coal ash impoundment
Loss Contingencies [Line Items]
Environmental liability		$ 17,300	17,300
Environmental liability, remediation period (in years)		4 years
Environmental liabilities		$ 13,400	12,900
Coal ash impoundment | Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Environmental obligations		$ 500	$ 2,400