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REGULATORY PROCEEDINGS (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Apr. 28, 2023 | Nov. 20, 2020 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Rate Proceedings [Abstract] |  |  |  |  |  |
Percentage of revenue increase requested for new rates | 23.84% |  |  |  |  |
Annual revenue performance obligation | $ 17.5 |  |  |  |  |
Percentage of distribution system infrastructure charge | 7.50% |  |  |  |  |
Percentage of DSIC rate upon implementation of temporary increase in base rates charged to customers | 16.34% |  |  |  |  |
Percentage of temporary rates permitted | 15.00% |  |  |  |  |
Amount of temporary rates permitted | $ 2.5 |  |  |  |  |
Term of statutory resolve timeframe |  |  |  |  | 7 months |
Period permitted to implement temporary rates |  |  |  |  | 60 days |
Other Proceedings [Abstract] |  |  |  |  |  |
Cumulative DSIC Rate |  | 7.50% |  |  |  |
Net Eligible Plant Improvements - Cumulative Dollars |  | $ 43.1 |  |  |  |
Maximum [Member] |  |  |  |  |  |
Rate Proceedings [Abstract] |  |  |  |  |  |
Percentage of gross water sales in temporary rate increase placed into effect until new rates approved | 15.00% |  |  |  |  |
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 |  |  | $ 1.4 | $ 1.4 | $ 3.9 | $ 3.9

X
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