Rate and Regulatory Matters (Details) - USD ($) $ in Millions			1 Months Ended	9 Months Ended	12 Months Ended
	Jan. 02, 2023	Jan. 02, 2022	Aug. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Pinelands [Member]
Regulatory Liability [Line Items]
Approved increase in annual operating revenues				$ 0.4
New Jersey Board of Public Utilities [Member] | Twin Lakes [Member]
Regulatory Liability [Line Items]
Escrow account				1.7
New Jersey Board of Public Utilities [Member] | Middlesex Water [Member]
Regulatory Liability [Line Items]
Approved increase in annual operating revenues		$ 20.7			$ 27.7
Base rate amount					$ 513.5
Return on equity					9.60%
New Jersey Board of Public Utilities [Member] | Middlesex Water [Member] | Scenario Forecast [Member]
Regulatory Liability [Line Items]
Approved increase in annual operating revenues	$ 7.0
New Jersey Board of Public Utilities [Member] | Middlesex Member [Member]
Regulatory Liability [Line Items]
Approved increase in annual operating revenues				2.7
New Jersey Board of Public Utilities [Member] | Pinelands [Member]
Regulatory Liability [Line Items]
Approved increase in annual operating revenues				$ 0.6
Delaware Public Service Commission Member | Tidewater [Member]
Regulatory Liability [Line Items]
Return on equity			6.00%
Rate reduction is expected to reduce annual revenue			$ 2.2