SUBSEQUENT EVENT (Details) (USD $)		1 Months Ended
	Jun. 30, 2013	Jul. 31, 2013 Subsequent Event [Member] South Jersey Gas Company [Member] Mortgages [Member] Series Due 2013, 4.46 Percent [Member]
Subsequent Event [Line Items]
Debt redeemed at par		$ 10,500,000
Stated interest rate	7.50%	4.46%