XML 88 R73.htm IDEA: XBRL DOCUMENT v3.20.2
DERIVATIVE INSTRUMENTS - Effect of Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative Instruments Not Designated as Hedging Instruments [Abstract]        
Total $ (1,621) $ (1,888) $ (5,943) $ (15,038)
Fair value of derivative instruments with credit-risk-related features 300   300  
Additional collateral, aggregate fair value 200   200  
Interest rate contracts | Non-Utility Revenue        
Derivatives, Fair Value [Line Items]        
Losses reclassified from AOCL into income (12) (12) (24) (24)
SJG | Interest rate contracts | Non-Utility Revenue        
Derivatives, Fair Value [Line Items]        
Losses reclassified from AOCL into income (12) (12) (24) (24)
Derivatives not designated as hedging instruments under GAAP        
Derivative Instruments Not Designated as Hedging Instruments [Abstract]        
(Losses) gains on energy-related commodity contracts (1,285) (143) (1,561) (12,203)
(Losses) gains on interest rate contracts $ (336) $ (1,745) $ (4,382) $ (2,835)