REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Regulated Operating Revenue, Gas	$ 965,969	$ 623,651
Regulated Operating Revenue, Other	5,490	1,642
Regulated Operating Revenue	971,459	625,293
Unbilled Receivables, Current	148,000		$ 183,200
Natural gas sales to customers [Member]
Regulated Operating Revenue, Gas	925,157	583,794
Transportation revenues [Member]
Regulated Operating Revenue, Gas	36,316	36,202
Miscellaneous revenues [Member]
Regulated Operating Revenue, Gas	4,496	3,655
Other revenues - natural gas sales related [Member]
Regulated Operating Revenue, Other	2,346	(1,021)
Other revenues [Member]
Regulated Operating Revenue, Other	$ 3,144	$ 2,663