CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income	$ 128,727	$ 101,041
Other Comprehensive Income, Net of Tax:
Reclassification of Unrealized Gain on Derivatives - Other to Net Income, net of tax	(8)	(8)
Other Comprehensive Income - Net of Tax	8	8
Comprehensive Income	128,735	101,049
Less: Comprehensive Income Attributable to Noncontrolling Interest	129	0
Comprehensive Income Attributable to South Jersey Industries, Inc.	128,606	101,049
SJG
Net Income	83,618	70,522
Other Comprehensive Income, Net of Tax:
Reclassification of Unrealized Gain on Derivatives - Other to Net Income, net of tax	(8)	(8)
Other Comprehensive Income - Net of Tax	8	8
Comprehensive Income	$ 83,626	$ 70,530