LONG-TERM DEBT	9 Months Ended
Sep. 30, 2017
Long-term Debt, Unclassified [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT: In January 2017, SJG issued $200.0 million aggregate principal amount of Medium Term Notes (MTNs), Series E, 2017, due January 2047, with principal payments beginning in 2025. The MTNs bear interest at an annual rate of 3.0%, payable semiannually. Proceeds were used to pay down SJG's $200.0 million multiple-draw term facility which was set to expire in June 2017. In January 2017, SJG entered into an unsecured, $200.0 million multiple-draw term loan credit agreement (Credit Agreement), which is syndicated among seven banks. Term loans under the Credit Agreement bear interest at a variable base rate or a variable LIBOR rate, at SJG's election. Under the Credit Agreement, SJG can borrow up to an aggregate of $200.0 million until July 2018, of which SJG borrowed $196.0 million during the nine months ended September 30, 2017. All loans under the Credit Agreement become due in January 2019. In May 2017, Marina voluntarily redeemed bonds issued by NJEDA in an aggregate principal amount of $61.4 million, as follows: Thermal Energy Facilities Revenue Bonds (Marina Energy LLC - 2001 Project) Series A ($20.0 million); Thermal Energy Facilities Federally Taxable Revenue Bonds (Marina Energy LLC - 2001 Project) Series B ($25.0 million); and Thermal Energy Facilities Revenue Bonds (Marina Energy LLC Project) Series 2006A ($16.4 million). In connection with the redemptions, separate related letter of credit reimbursement agreements were terminated (see Note 11). In June 2017, SJI redeemed at maturity $16.0 million of 2.71% Senior Unsecured Notes. In July 2017, SJG redeemed at maturity $15.0 million of 4.657% MTNs. In August 2017, SJI entered into a note purchase agreement that provides for the issuance of an aggregate of $100.0 million of MTNs. Pursuant to the agreement, SJI issued $50.0 million aggregate principal amount of MTNs, consisting of (a) $25.0 million aggregate principal amount of 3.22% Senior Notes, Series 2017A-1, due August 2024, and (b) $25.0 million aggregate principal amount of 3.46% Senior Notes, Series 2017B-1, due August 2027. The agreement also provides for the issuance of (a) $25.0 million aggregate principal amount of 3.32% Senior Notes, Series 2017A-2, due January 2025 and (b) $25.0 million aggregate principal amount of 3.56% Senior Notes, Series 2017B-2, due January 2028, that SJI anticipates issuing in January 2018. SJI and SJG did not issue or retire any other long-term debt during the nine months ended September 30, 2017.

LONG-TERM DEBT:

In January 2017, SJG issued $200.0 million aggregate principal amount of Medium Term Notes (MTNs), Series E, 2017, due January 2047, with principal payments beginning in 2025. The MTNs bear interest at an annual rate of 3.0%, payable semiannually. Proceeds were used to pay down SJG's $200.0 million multiple-draw term facility which was set to expire in June 2017.

In January 2017, SJG entered into an unsecured, $200.0 million multiple-draw term loan credit agreement (Credit Agreement), which is syndicated among seven banks. Term loans under the Credit Agreement bear interest at a variable base rate or a variable LIBOR rate, at SJG's election. Under the Credit Agreement, SJG can borrow up to an aggregate of $200.0 million until July 2018, of which SJG borrowed $196.0 million during the nine months ended September 30, 2017. All loans under the Credit Agreement become due in January 2019.

In May 2017, Marina voluntarily redeemed bonds issued by NJEDA in an aggregate principal amount of $61.4 million, as follows: Thermal Energy Facilities Revenue Bonds (Marina Energy LLC - 2001 Project) Series A ($20.0 million); Thermal Energy Facilities Federally Taxable Revenue Bonds (Marina Energy LLC - 2001 Project) Series B ($25.0 million); and Thermal Energy Facilities Revenue Bonds (Marina Energy LLC Project) Series 2006A ($16.4 million). In connection with the redemptions, separate related letter of credit reimbursement agreements were terminated (see Note 11).

In June 2017, SJI redeemed at maturity $16.0 million of 2.71% Senior Unsecured Notes.

In July 2017, SJG redeemed at maturity $15.0 million of 4.657% MTNs.

In August 2017, SJI entered into a note purchase agreement that provides for the issuance of an aggregate of $100.0 million of MTNs. Pursuant to the agreement, SJI issued $50.0 million aggregate principal amount of MTNs, consisting of (a) $25.0 million aggregate principal amount of 3.22% Senior Notes, Series 2017A-1, due August 2024, and (b) $25.0 million aggregate principal amount of 3.46% Senior Notes, Series 2017B-1, due August 2027. The agreement also provides for the issuance of (a) $25.0 million aggregate principal amount of 3.32% Senior Notes, Series 2017A-2, due January 2025 and (b) $25.0 million aggregate principal amount of 3.56% Senior Notes, Series 2017B-2, due January 2028, that SJI anticipates issuing in January 2018.

SJI and SJG did not issue or retire any other long-term debt during the nine months ended September 30, 2017.