COMMITMENTS AND CONTINGENCIES (Details)		1 Months Ended	12 Months Ended
	Feb. 21, 2023 USD ($)	Sep. 30, 2020 USD ($) dth	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Recorded legal liability			$ 500,000
Legal contingency receivable			$ 250,000
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]			Environmental liabilities
Environmental liabilities			$ 27,400,000	$ 11,306,000
Environmental liability related to landfill, period			30 years
Annual inflation rate on environmental liability related to landfill			3.00%
Purchase commitment, energy volume required per day (in dekatherm) | dth		15,000,000
Purchase commitment per month		$ 200,000
Purchase commitment, termination notice period		12 months
Purchase commitment period		10 years
Subsequent Event
Loss Contingencies [Line Items]
Settlement amount	$ 500,000
Amount paid by insurance agent	250,000
Coal ash impoundment
Loss Contingencies [Line Items]
Environmental liability			$ 17,500,000	2,700,000
Increase in coal combustion residual liabilities due to closure of a coal ash pond			14,800,000
Environmental liabilities			10,500,000	$ 8,600,000
Coal ash impoundment | Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Environmental obligations			$ 1,900,000