XML 103 R81.htm IDEA: XBRL DOCUMENT
v2.4.0.8

INCOME TAXES, INCOME TAX CARRYFORWARDS (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2013 years | Sep. 30, 2012
Operating Loss Carryforwards [Line Items] |  |
Tax credit carryforward, expiration period | 20 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating losses | $ 104,400,000 |
Net operating losses, life | 20 |
Deferred tax asset, loss carryforwards | 6,118,000 |
Operating Loss Carryforwards, Valuation Allowance | 262,000 | 0
Internal Revenue Service (IRS) [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Tax credit carryforward | 40,021,000 |
Expiring in Next Fiscal Year to Next Five Fiscal Years [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax asset, loss carryforwards | 62,000 |
Expiring in Six Fiscal Years to Ten Fiscal Years [Member] [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax asset, loss carryforwards | 0 |
Expiring in Eleven Fiscal Years to Fifteen Fiscal Years [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax asset, loss carryforwards | 0 |
Expiring in Sixteen Fiscal Years to Twenty Fiscal Years [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax asset, loss carryforwards | $ 6,056,000 |

X
- Definition Operating Loss Carryforward, Expiration Terms + References No definition available. + Details
Name: | njr_OperatingLossCarryforwardExpirationTerms
Namespace Prefix: | njr_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Credit Carryforward, Expiration Terms + References No definition available. + Details
Name: | njr_TaxCreditCarryforwardExpirationTerms
Namespace Prefix: | njr_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 30 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315 + Details
Name: | us-gaap_OperatingLossCarryforwardsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
Name: | us-gaap_TaxCreditCarryforwardAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant