CONTRACT ASSETS AND CONTRACT LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract liabilities recognized	$ 300
Accounts receivable
Accounts receivable—Utility Members	94,392	$ 101,394
Other accounts receivable - trade:	16,118	23,123
Contract liabilities
Contract liabilities (unearned revenue)	3,894	4,159
Other accounts receivable - trade
Accounts receivable
Other accounts receivable - trade:	13,623	20,734
Other accounts receivable - trade | Non-member electric sales
Accounts receivable
Other accounts receivable - trade:	4,092	9,657
Other accounts receivable - trade | Other
Accounts receivable
Other accounts receivable - trade:	9,531	11,077
Other accounts receivable - nontrade
Accounts receivable
Other accounts receivable - trade:	$ 2,495	$ 2,389