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