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Segment Information (Tables)
3 Months Ended
Mar. 31, 2014
Segment Reporting [Abstract]  
Results from Continuing Operations by Reportable Segment
 
 
 
 
 
 
 
 
 
 
 

(Thousands of Dollars)
 
Regulated
Electric
 
Regulated
Natural Gas
 
All
Other
 
Reconciling
Eliminations
 
Consolidated
Total
Three Months Ended March 31, 2014
 
 
 
 
 
 
 
 
 
 
Operating revenues (a)
 
$
211,097

 
$
73,791

 
$
254

 
$

 
$
285,142

Intersegment revenues
 
92

 
2,917

 

 
(3,009
)
 

Total revenues
 
$
211,189

 
$
76,708

 
$
254

 
$
(3,009
)
 
$
285,142

Net income
 
$
15,066

 
$
7,709

 
$
1,460

 
$

 
$
24,235


(Thousands of Dollars)
 
Regulated
Electric
 
Regulated
Natural Gas
 
All
Other
 
Reconciling
Eliminations
 
Consolidated
Total
Three Months Ended March 31, 2013
 
 
 
 
 
 
 
 
 
 
Operating revenues (a)
 
$
190,811

 
$
50,357

 
$
247

 
$

 
$
241,415

Intersegment revenues
 
78

 
308

 

 
(386
)
 

Total revenues
 
$
190,889

 
$
50,665

 
$
247

 
$
(386
)
 
$
241,415

Net income
 
$
13,603

 
$
5,624

 
$
458

 
$

 
$
19,685

(a) 
Operating revenues include $31 million and $32 million of intercompany electric revenue for the three months ended March 31, 2014 and 2013, respectively.