Condensed Consolidated Statements of Comprehensive (Loss)/Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ (18,830)	$ (96,740)	$ 110,514	$ 31,987
Other Comprehensive Income, Net of Tax:
Reclassification of Unrealized Gain on Derivatives - Other to Net Income, net of tax	8	8	17	16
Other Comprehensive Income - Net of Tax	8	8	17	16
Comprehensive (Loss) Income	(18,822)	(96,732)	110,531	32,003
Less: Comprehensive Income Attributable to Noncontrolling Interests	76	88	211	217
Comprehensive (Loss) Income Attributable to South Jersey Industries, Inc.	$ (18,898)	$ (96,820)	$ 110,320	$ 31,786