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DERIVATIVE INSTRUMENTS - ADDITIONAL INFORMATION (Details) certificate in Thousands | Dec. 31, 2019 USD ($) certificate | Dec. 31, 2018 USD ($) | Jan. 31, 2018 | Dec. 31, 2017 USD ($)
--- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |
Derivative, net liability position, aggregate fair value | $ 4,000 | $ 186,000 |  |
Additional collateral, aggregate fair value | 0 |  |  |
Foreign currency contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | $ 6,800,000 |  |  |
Physical commodity contracts | Energy Services |  |  |  |
Derivative [Line Items] |  |  |  |
Number of SRECs | certificate | (886) |  |  |
Credit Agreement Due August 16, 2019 | Term Loan | Interest rate swap |  |  |  |
Derivative [Line Items] |  |  |  |
Benchmark interest rate |  |  | 2.84% |
Credit Agreement Due August 16, 2019 | Term Loan | Interest rate swap | NJR |  |  |  |
Derivative [Line Items] |  |  |  |
Debt issued |  |  |  | $ 100,000,000

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