Rate and Regulatory Matters (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Oct. 31, 2015	Mar. 31, 2015	Sep. 30, 2015	Jul. 01, 2015	Jun. 30, 2015
New Jersey Board of Public Utilities [Member]
Regulatory Liabilities [Line Items]
Originally filed increase in annual operating revenue		$ 9.5
Amended filed increase in annual operating revenue			$ 5.0
Return on equity			9.75%
Base rate amount			$ 219.0
Projected annual revenue			$ 0.1
Public Utilities Distribution System Improvement Charge			0.00%
New Jersey Board of Public Utilities [Member] | Pinelands Water Company [Member] | Subsequent Event [Member]
Regulatory Liabilities [Line Items]
Originally filed increase in annual operating revenue	$ 0.3
New Jersey Board of Public Utilities [Member] | Pinelands Wastewater [Member] | Subsequent Event [Member]
Regulatory Liabilities [Line Items]
Originally filed increase in annual operating revenue	$ 0.2
Delware Public Service Commission [Member] | Tidewater [Member]
Regulatory Liabilities [Line Items]
Projected annual revenue			$ 0.1
Public Utilities Distribution System Improvement Charge				0.37%	0.31%