CONTRACT ASSETS AND CONTRACT LIABILITIES (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract liabilities recognized	$ 900
Accounts receivable
Accounts receivable—Utility Members	92,299	$ 101,394
Other accounts receivable - trade:	44,457	23,123
Contract liabilities
Contract liabilities (unearned revenue)	3,284	4,159
Other accounts receivable - trade
Accounts receivable
Other accounts receivable - trade:	30,977	20,734
Other accounts receivable - trade | Non-member electric sales
Accounts receivable
Other accounts receivable - trade:	22,954	9,657
Other accounts receivable - trade | Other
Accounts receivable
Other accounts receivable - trade:	8,023	11,077
Other accounts receivable - nontrade
Accounts receivable
Other accounts receivable - trade:	$ 13,480	$ 2,389