SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, CAPITALIZED AND DEFERRED INTEREST (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 23, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Debt instrument, term	3 years
SBC interest rate		2.54%	2.65%	2.84%
Deferred interest		$ 61	$ 586	$ 653
Seven-Year Treasury Rate [Member]
Debt instrument, term		7 years
Basis spread on Treasury rate		0.60%
NJNG [Member]
AFUDC - Debt		$ 2,472	1,057	921
AFUDC - Equity		3,825	1,562	2,037
Total		$ 6,297	$ 2,619	$ 2,958
Weighted average interest rate		4.63%	3.30%	1.05%