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REGULATION - REGULATORY FILINGS (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 26, 2022 | Nov. 19, 2021 | Nov. 17, 2021 | Dec. 31, 2021 | Sep. 30, 2021
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Other noncurrent regulatory assets |  |  |  | $ 528,074 | $ 522,099
Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Other noncurrent regulatory assets |  |  |  | $ 10,700 |
Base Rate Stipulation |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Weighted average cost of capital |  |  |  | 6.84% |
Approved return on equity |  |  |  | 9.60% |
Approved equity capital structure, percentage |  |  |  | 54.00% |
Public utilities, approved depreciation rate, percentage |  |  |  | 2.78% |
BPU | Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Requested rate increase (decrease), amount |  |  | $ 79,000 |  |
SAFE II and NJ RISE |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Approved rate increase (decrease), amount |  |  |  | $ 269 |
BGSS | Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Requested rate increase (decrease), amount |  |  | 2,900 |  |
BGSS | Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Requested rate increase (decrease), amount |  | $ 24,200 |  |  |
BGSS Balancing | Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Requested rate increase (decrease), amount |  |  | 13,000 |  |
Conservation Incentive Program | Natural Gas Distribution |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Requested rate increase (decrease), amount |  |  | $ (6,300) |  |
SAVEGREEN | Subsequent Event |  |  |  |  |
Schedule of Regulatory Filings [Line Items] |  |  |  |  |
Annual recovery increase | $ 2,200 |  |  |  |

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