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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Environmental Loss Contingencies
The following table details the amounts expended and accrued for SJI's environmental remediation during the last two years (in thousands):

 
2012
 
2011
Beginning of Year
$
94,160

 
$
91,833

   Accruals
30,349

 
21,934

   Expenditures
(12,411
)
 
(19,607
)
End of Year
$
112,098

 
$
94,160