REGULATORY PROCEEDINGS (Details) - USD ($) $ in Millions			3 Months Ended
	Apr. 28, 2023	Nov. 20, 2020	Mar. 31, 2024	Mar. 31, 2023
Rate Proceedings [Abstract]
Percentage of revenue increase requested for new rates	22.66%
Annual revenue performance obligation	$ 16.7
Percentage of distribution system infrastructure charge	7.50%
Percentage of DSIC rate upon implementation of temporary increase in base rates charged to customers	15.16%
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]
Rate Proceedings [Abstract]
Amount held in reserve related to temporary base rate increase			$ 0.0
Other Proceedings [Abstract]
Revenue earned in DSIC rate increases				$ 1.2