REVENUE - Accounts Receivable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable
Disaggregation of Revenue [Line Items]
Contracts with customers, asset	$ 378,095	$ 259,045	$ 343,835	$ 278,723
Increase (decrease) in contracts with customers, asset	34,260	(19,678)
Unbilled Revenue
Disaggregation of Revenue [Line Items]
Contracts with customers, asset	23,012	30,800	87,357	85,423
Increase (decrease) in contracts with customers, asset	(64,345)	(54,623)
South Jersey Gas Company | Accounts Receivable
Disaggregation of Revenue [Line Items]
Contracts with customers, asset	133,886	96,824	125,848	88,657
Increase (decrease) in contracts with customers, asset	8,038	8,167
South Jersey Gas Company | Unbilled Revenue
Disaggregation of Revenue [Line Items]
Contracts with customers, asset	9,654	13,276	$ 43,236	$ 46,837
Increase (decrease) in contracts with customers, asset	$ (33,582)	$ (33,561)