FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES - Changes in Measurements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	$ 1,364	$ 4,956	$ 680	$ 11,006
Other Changes in Fair Value from Continuing and New Contracts, Net	(2,786)	(13,860)	1,667	(12,547)
Settlements	(1,031)	(1,222)	(4,800)	(8,585)
Balance at end of period	(2,453)	(10,126)	(2,453)	(10,126)
SJG
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	22,215	4,721	3,638	3,385
Other Changes in Fair Value from Continuing and New Contracts, Net	(1,400)	2,396	20,815	7,117
Settlements	0	0	(3,638)	(3,385)
Balance at end of period	$ 20,815	$ 7,117	$ 20,815	$ 7,117