REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Regulated Operating Revenue, Gas	$ 355,470	$ 270,296	$ 1,747,858	$ 1,205,686
Regulated Operating Revenue, Other	3,893	3,627	11,939	9,176
Regulated Operating Revenue	359,363	273,923	1,759,797	1,214,862
Unbilled Receivables, Current	79,200		79,200		$ 183,200
Natural gas sales to customers [Member]
Regulated Operating Revenue, Gas	322,444	240,591	1,640,893	1,105,835
Transportation revenues [Member]
Regulated Operating Revenue, Gas	28,035	25,342	92,350	87,760
Miscellaneous revenues [Member]
Regulated Operating Revenue, Gas	4,991	4,363	14,615	12,091
Other revenues - natural gas sales related [Member]
Regulated Operating Revenue, Other	427	545	2,658	849
Other revenues [Member]
Regulated Operating Revenue, Other	$ 3,466	$ 3,082	$ 9,281	$ 8,327