FINANCIAL INSTRUMENTS - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 50,876	$ 42,233	$ 41,763	$ 30,582
Provision for expected credit losses	2,435	2,375	7,355	7,621
Regulated assets	(5,863)	(293)	815	8,982
Recoveries of accounts previously written off	326	414	1,324	772
Uncollectible accounts written off	(3,367)	(1,664)	(6,850)	(4,892)
Balance at end of period	44,407	43,065	44,407	43,065
South Jersey Gas Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	29,791	21,706	25,166	17,359
Provision for expected credit losses	1,816	1,411	5,499	5,529
Regulated assets	(1,598)	1,059	(44)	3,030
Recoveries of accounts previously written off	156	400	814	503
Uncollectible accounts written off	(1,200)	(702)	(2,470)	(2,547)
Balance at end of period	$ 28,965	$ 23,874	$ 28,965	$ 23,874