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INFORMATION BY OPERATING SEGMENT (Tables)
3 Months Ended
Dec. 31, 2012
Segment Reporting [Abstract]  
Schedule of operating segment information
(Thousands)
Gas Utility
 
Other
 
Adjustments & Eliminations
 
Total
Three Months Ended
 
 
 
 
 
 
 
December 31, 2012
 
 
 
 
 
 
 
Operating revenues
$
250,791

 
$
1,143

 
$

 
$
251,934

Net Economic Earnings
25,341

 
460

 

 
25,801

Total assets
1,809,722

 
1,008

 

 
1,810,730

Three Months Ended
 
 
 
 
 
 
 
December 31, 2011
 
 
 
 
 
 
 
Operating revenues
$
250,902

 
$
1,081

 
$

 
$
251,983

Net Economic Earnings
21,079

 
615

 

 
21,694

Total assets
1,753,859

 
2,176

 

 
1,756,035

Schedule of the reconciliation of net economic earnings to net income
Reconciliation of Net Economic Earnings to Net Income
 
Three Months Ended
 
 
December 31,
 
(Thousands)
2012
 
2011
 
Total Net Economic Earnings above
$
25,801

 
$
21,694

 
Add: Unrealized (loss) gain on energy-related
 derivative contracts, net of tax
(58
)
 
3

 
Net Income
$
25,743

 
$
21,697