COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) dth	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Product Liability Contingency [Line Items]
Environmental trust liability		$ 28,616	$ 29,866
Environmental liability related to landfill, period		30 years
Annual inflation rate on environmental liability related to landfill		2.40%
Purchase commitment, energy volume required per day (in dekatherm) | dth	15,000
Purchase commitment per month	$ 200
Purchase commitment, termination notice period	12 months
Purchase commitment period	10 years
Coal ash impoundment
Product Liability Contingency [Line Items]
Environmental liability		$ 17,300	17,300
Environmental liability, remediation period		5 years
Environmental trust liability		$ 12,900	$ 12,900