XML 81 R38.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ACCOUNTS RECEIVABLE BY SUBSIDIARY (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Sep. 30, 2014
--- | --- | ---
accounts receivable by subsidiary [Line Items] |  |  |  |
Billed | $ 314,139 us-gaap_AccountsReceivableGrossCurrent |  | $ 189,970 us-gaap_AccountsReceivableGrossCurrent |
Receivable by Subsidiary, percentage | 100.00%njr_ReceivableBySubsidiaryPercentage |  | 100.00%njr_ReceivableBySubsidiaryPercentage |
Unbilled revenues | 48,172 us-gaap_UnbilledReceivablesCurrent |  | 7,231 us-gaap_UnbilledReceivablesCurrent |
NJRES [Member] |  |  |  |
accounts receivable by subsidiary [Line Items] |  |  |  |
Billed | 236,564 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjresMember |  | 142,566 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjresMember |
Receivable by Subsidiary, percentage | 75.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjresMember |  | 75.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjresMember |
NJNG [Member] |  |  |  |
accounts receivable by subsidiary [Line Items] |  |  |  |
Billed | 74,198 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjngMember | [1] | 41,281 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjngMember | [1]
Receivable by Subsidiary, percentage | 24.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjngMember |  | 22.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjngMember |
NJRCEV [Member] |  |  |  |
accounts receivable by subsidiary [Line Items] |  |  |  |
Billed | 725 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjrcevMember |  | 594 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjrcevMember |
Receivable by Subsidiary, percentage | 0.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjrcevMember |  | 0.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjrcevMember |
NJRHS and Other [Member] |  |  |  |
accounts receivable by subsidiary [Line Items] |  |  |  |
Billed | $ 2,652 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjrhsAndOtherMember |  | $ 5,529 us-gaap_AccountsReceivableGrossCurrent / dei_LegalEntityAxis = njr_NjrhsAndOtherMember |
Receivable by Subsidiary, percentage | 1.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjrhsAndOtherMember |  | 3.00%njr_ReceivableBySubsidiaryPercentage / dei_LegalEntityAxis = njr_NjrhsAndOtherMember |
[1] | Does not include unbilled revenues of $48.2 million and $7.2 million as of December 31, 2014 and September 30, 2014, respectively.

X
- Details
Name: | njr_AccountsreceivablebysubsidiaryLineItems
Namespace Prefix: | njr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Receivable by Subsidiary Percentage + References No definition available. + Details
Name: | njr_ReceivableBySubsidiaryPercentage
Namespace Prefix: | njr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. + 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 210.5-02.3) -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 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
Name: | us-gaap_AccountsReceivableGrossCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_UnbilledReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=njr_NjngMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=njr_NjrcevMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=njr_NjresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=njr_NjrhsAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |