REGULATORY LIABILITIES (Details) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 19, 2022 USD ($) Installment	Aug. 31, 2022 USD ($)	Mar. 31, 2023 USD ($) Installment	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Jan. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)
REGULATORY LIABILITIES [Abstract]
Litigation settlement amount	$ 10,000		$ 10,000
Litigation settlement amount received		$ 2,500
Litigation settlement, remaining amount	$ 7,500		$ 7,500
Number of installments | Installment	3		3
Federal corporate tax rate			21.00%	34.00%
Decrease in the net deferred income tax liability							$ 24,300
Regulatory Liabilities [Abstract]
Regulatory liabilities			$ 28,664	$ 22,800	$ 28,721
DEPSC [Member]
Regulatory Liabilities [Abstract]
Regulatory liabilities						$ 22,200
Regulatory liabilities, amortization period			49 years 6 months
MDPSC [Member]
Regulatory Liabilities [Abstract]
Regulatory liabilities			$ 600
Utility Plant Retirement Cost Obligation [Member]
Regulatory Liabilities [Abstract]
Regulatory liabilities			47		0
Deferred Settlement Refunds [Member]
Regulatory Liabilities [Abstract]
Regulatory liabilities			7,487		7,487
Deferred Income Taxes [Member]
Regulatory Liabilities [Abstract]
Regulatory liabilities			$ 21,130		$ 21,234