REGULATORY PROCEEDINGS (Details) - USD ($) $ in Millions		3 Months Ended
	Nov. 20, 2020	Mar. 31, 2023	Mar. 31, 2022
Other Proceedings [Abstract]
Cumulative DSIC Rate	7.50%
Net Eligible Plant Improvements - Cumulative Dollars	$ 43.1
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		$ 1.2	$ 1.2