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INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Summary of Impairment (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) project | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) project | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of offshore wind projects | project | 3 |  | 3 |  |
Impairment Charges, pre-tax | $ 1,766,000 | $ 401,000 | $ 2,167,000 | $ 0 | $ 0
Tax Benefit | (144,000) | (70,000) | (214,000) |  |
Equity method investment, other than temporary impairment, after tax | 1,622,000 | 331,000 | 1,953,000 |  |
Lower expected sales proceeds across all three wind projects |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Impairment Charges, pre-tax | 525,000 | 401,000 | 926,000 |  |
Expected cost overruns not recovered in the sales price |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Impairment Charges, pre-tax | 441,000 | 0 | 441,000 |  |
Loss of sales value from the sale price offered by GIP, including loss of ITC adders value, cancellation costs and other impacts assuming Sunrise Wind project is abandoned |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Impairment Charges, pre-tax | $ 800,000 | $ 0 | $ 800,000 |  |

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