Commitments and Contingent Liabilities (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) gal l	Jun. 30, 2023 USD ($)
Commitments and Contingent Liabilities [Line Items]
Average purchase of gallons | l	47
Estimated incremental borrowing rate	4.03%
Rental expenses under operating leases | $	$ 0.4	$ 0.2
Estimated obligation expenditure | $	$ 13.0
Purchase Commitment [Member]
Commitments and Contingent Liabilities [Line Items]
Purchase commitment expiration date of contract	Nov. 30, 2048
Water Supply [Member]
Commitments and Contingent Liabilities [Line Items]
Average purchase of gallons | gal	27,000,000
NJBPU Regulated water [Member]
Commitments and Contingent Liabilities [Line Items]
Purchase commitment expiration date of contract	Feb. 27, 2026
Average purchase of gallons | l	3
Treated Water [Member]
Commitments and Contingent Liabilities [Line Items]
Average purchase of gallons | gal	60,000,000