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REGULATORY PROCEEDINGS (Details) $ in Millions |  |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 12, 2024 USD ($) | May 30, 2024 USD ($) | Nov. 20, 2020 USD ($) | Sep. 30, 2024 USD ($) Application | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) Application | Sep. 30, 2023 USD ($) | Nov. 28, 2023 USD ($) | Apr. 28, 2023 USD ($)
Rate Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Percentage of revenue increase requested for new rates | 15.20% |  |  |  |  |  |  | 14.60% | 22.70%
Annual revenue performance obligation | $ 11.2 |  |  |  |  |  |  | $ 10.8 | $ 16.7
Percentage of distribution system infrastructure charge |  |  |  |  |  |  |  | 7.50% |
Percentage of return on common equity | 9.50% |  |  |  |  |  |  |  |
Overall rate of return on rate base | 6.75% |  |  |  |  |  |  |  |
Other Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Number of applications | Application |  |  |  | 2 |  | 2 |  |  |
Cumulative DSIC Rate |  | 0.34% | 7.50% |  |  |  |  |  |
Net Eligible Plant Improvements - Cumulative Dollars |  | $ 2.0 | $ 43.1 |  |  |  |  |  |
Percentage of gross water sales in temporary rate increase placed into effect until new rates approved |  |  |  |  |  |  |  | 0.00% |
Delaware [Member] |  |  |  |  |  |  |  |  |
Rate Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Percentage of gross water sales |  |  |  |  |  | 15.00% |  |  |
Period to complete rate case by law |  |  |  |  |  | 7 months |  |  |
Delaware [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Rate Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Temporary annual rate increase subject to 15% gross water sales limitation |  |  |  |  |  | $ 2.5 |  |  |
Percentage of rate relief allowed should a rate case not complete |  |  |  |  |  | 15.00% |  |  |
Other Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Distribution System Improvement Charge rate increase applied between base rate filings |  |  |  |  |  | 7.50% |  |  |
Distribution System Improvement Charge rate increase within a 12-month period |  |  |  |  |  | 5.00% |  |  |
Artesian Water [Member] |  |  |  |  |  |  |  |  |
Other Proceedings [Abstract] |  |  |  |  |  |  |  |  |
Revenue earned in DSIC rate increases |  |  |  | $ 0.1 | $ 1.4 | $ 0.1 | $ 3.9 |  |

X
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