NATURE OF THE BUSINESS (Details)	9 Months Ended
Jun. 30, 2014 customer
Steckman Ridge [Member]
Equity method investment, ownership percentage	50.00%
Iroquois [Member]
Equity method investment, ownership percentage	5.53%
NJNG [Member]
Total retail customers	503,800

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant