REVENUE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Regulated Operating Revenue, Gas	$ 2,045,872	$ 2,346,321	$ 2,561,618
Regulated Operating Revenue, Other	37,686	25,669	16,387
Regulated Operating Revenue	2,083,558	2,371,990	2,578,005
Unbilled Receivables, Current	212,000	191,400
Natural gas sales to customers [Member]
Regulated Operating Revenue, Gas	1,841,400	2,141,908	2,410,048
Transportation revenues [Member]
Regulated Operating Revenue, Gas	137,111	132,945	125,951
Securitization Customer Charges
Regulated Operating Revenue, Gas	44,390	48,677	5,769
Miscellaneous revenues [Member]
Regulated Operating Revenue, Gas	22,971	22,791	19,850
Other revenues - natural gas sales related [Member]
Regulated Operating Revenue, Other	24,296	12,764	3,403
Other revenues [Member]
Regulated Operating Revenue, Other	$ 13,390	$ 12,905	$ 12,984