REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Regulated Operating Revenue, Gas	$ 747,451	$ 1,022,717
Regulated Operating Revenue, Other	10,869	9,426
Regulated Operating Revenue	758,320	1,032,143
Unbilled Receivables, Current	121,700		$ 191,400
Natural gas sales to customers [Member]
Regulated Operating Revenue, Gas	689,505	966,359
Transportation revenues [Member]
Regulated Operating Revenue, Gas	39,967	38,527
Securitization Customer Charges
Regulated Operating Revenue, Gas	11,671	11,933
Miscellaneous revenues [Member]
Regulated Operating Revenue, Gas	6,308	5,898
Other revenues - natural gas sales related [Member]
Regulated Operating Revenue, Other	7,995	5,790
Other revenues [Member]
Regulated Operating Revenue, Other	$ 2,874	$ 3,636