XML 40 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.8

DEBT - CREDIT FACILITIES (Details) (USD $) |  |  |  |  |  |  |  |  |  |  |  |  | 24 Months Ended |  | 24 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 Commercial Paper [Member] NJNG [Member] | Sep. 30, 2012 Commercial Paper [Member] NJNG [Member] | Jun. 30, 2013 Notes Payable to Banks [Member] NJR [Member] | Sep. 30, 2012 Notes Payable to Banks [Member] NJR [Member] | Jun. 30, 2013 Letter of Credit [Member] NJR [Member] | Sep. 30, 2012 Letter of Credit [Member] NJR [Member] | Jun. 30, 2013 Letter of Credit [Member] NJR [Member] | Jun. 30, 2013 Bank Credit Facility Dedicated to EDA Bonds [Member] NJNG [Member] | Sep. 30, 2012 Bank Credit Facility Dedicated to EDA Bonds [Member] NJNG [Member] | Jun. 30, 2013 Bank Revolving Credit Facility [Member] NJNG [Member] | Sep. 30, 2012 Bank Revolving Credit Facility [Member] NJNG [Member] | Jun. 30, 2013 Bank Revolving Credit Facility [Member] NJR [Member] | Sep. 30, 2012 Bank Revolving Credit Facility [Member] NJR [Member] | May 10, 2013 Debt Shelf Facility Metlife [Member] NJR [Member] | Jun. 30, 2013 Debt Shelf Facility Metlife [Member] Unsecured senior note 1.94% [Member] NJR [Member] | Jun. 30, 2013 Debt Shelf Facility Prudential [Member] NJR [Member]
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank credit facilities |  |  |  |  |  |  | $ 10,000,000 | $ 100,000,000 | [1],[2],[3] | $ 100,000,000 | [1],[2],[3] | $ 250,000,000 | [3] | $ 200,000,000 | [3] | $ 325,000,000 | [3] | $ 325,000,000 | [3] |  |  | $ 75,000,000
Issuance period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  | 3 years
Amount outstanding at end of period | 96,000,000 | 135,000,000 | 200,900,000 | 144,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |
Weighted average interest rate at end of period | 0.15% | 0.18% | 1.12% | 1.16% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount available at end of period |  |  |  |  |  |  |  |  |  |  |  | 154,000,000 |  | 65,000,000 |  | 107,710,000 | [4] | 166,339,000 | [4] |  |  | 25,000,000
Letters of credit outstanding, amount |  |  |  |  | $ 16,400,000 | $ 13,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | There were no borrowings outstanding as of June 30, 2013 and September 30, 2012, respectively.
[2] | New Jersey Economic Development Authority (EDA) Bonds.
[3] | Committed credit facilities, which require commitment fees on the unused amounts.
[4] | Letters of credit outstanding total $16.4 million and $13.9 million as of June 30, 2013 and September 30, 2012, respectively, which reduces amount available.

X
- Definition Line of Credit Facility, Issuance period + References No definition available. + Details
Name: | njr_LineofCreditFacilityIssuanceperiod
Namespace Prefix: | njr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of debt outstanding by type or by instrument at that time. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant