Capitalization (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended		9 Months Ended
	Jul. 31, 2015	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jul. 01, 2015	Dec. 31, 2014	Oct. 31, 2014
Schedule of Capitalization [Line Items]
Issuance of shares under the DRP,shares			32,585,000	35,078,000
Issuance of shares under the DRP			$ 700	$ 700
Additional shares authorized for potential issuance						700,000
Deobligated Principal Payments		$ 500	457
Proceeds from long-term debt borrowing			3,000	$ 4,398
Other long term debt		52,300	52,300		$ 52,300		$ 50,800
Customer advances		21,979	21,979		21,979		21,978
New Jersey Environmental Infrastructure Trust [Member]
Schedule of Capitalization [Line Items]
Loan amount							$ 5,000
Tidewater [Member]
Schedule of Capitalization [Line Items]
Loan amount		$ 2,000	2,000		2,000			$ 15,000
Proceeds from long-term debt borrowing	$ 2,000		$ 3,000		$ 11,000
Interest rate		4.46%	4.46%		4.46%
Due date of debt			Apr. 01, 2040