XML 23 R55.htm IDEA: XBRL DOCUMENT v2.3.0.15
REGULATION, REGULATORY ASSETS AND LIABILITIES (Details) (USD $)
12 Months Ended
Sep. 30, 2011
years
Customers
MMcf
Sep. 30, 2010
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets current$ 17,630,000$ 51,466,000
Regulatory assets noncurrent434,185,000454,601,000
Regulatory Liability, Current4,633,0000
Regulatory liability-noncurrent59,837,00057,648,000
Regulatory Liability, Amortization Period48 
Underrecovered gas costs [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets current036,485,000
Conservation Incentive Program [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets current9,178,00014,960,000
Enviromental remediation costs expended, net of recoveries [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent75,646,00075,707,000
Enviromental remediation costs liability for future expenditures [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent182,900,000201,600,000
Deferred income and other taxes [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent10,879,00013,860,000
Derivatives, net [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets current8,452,0000
Regulatory assets noncurrent016,497,000
Energy Efficiency Program [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent11,906,0003,958,000
New Jersey Clean Energy Program [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent20,144,00030,935,000
Post Employment Benefit Costs (Note 10) [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent123,827,000106,225,000
Other [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets current021,000
Other [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory assets noncurrent8,883,0005,819,000
Regulatory Asset, Maximum Amount to Be Recorded Annually700,000 
Regulatory Assets, Expense Bench Mark1,400,000 
Regulatory Assets, Threshold Of Recording Regulatory Liability When Net Liability Exceeds Amount1,000,000 
Overrecovered gas costs [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory Liability, Current4,633,0000
Cost of removal obligation [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory liability-noncurrent59,752,00057,648,000
Other [Member]
  
Regulatory Assets And Liabilities [Line Items]  
Regulatory liability-noncurrent$ 85,000$ 0