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Business segment data (Tables)
3 Months Ended
Mar. 31, 2014
Segment Reporting [Abstract]  
Information on the Company's businesses
Information on the Company's businesses was as follows:
Three Months Ended March 31, 2014
External
Operating
Revenues
Inter-
segment
Operating
Revenues
Earnings
on Common
Stock
 
(In thousands)
Electric
$
73,647

$

$
11,033

Natural gas distribution
374,233


27,263

Pipeline and energy services
43,661

18,276

4,349

 
491,541

18,276

42,645

Exploration and production
116,669

20,867

20,939

Construction materials and contracting
164,423

4,017

(23,574
)
Construction services
269,892

3,738

16,568

Other
328

1,724

264

 
551,312

30,346

14,197

Intersegment eliminations

(48,622
)
(351
)
Total
$
1,042,853

$

$
56,491



Three Months Ended March 31, 2013
External
Operating
Revenues
Inter-
segment
Operating
Revenues
Earnings
on Common
Stock
 
(In thousands)
Electric
$
64,654

$

$
9,825

Natural gas distribution
331,754


32,518

Pipeline and energy services
27,716

18,718

2,330

 
424,124

18,718

44,673

Exploration and production
115,363

9,812

20,284

Construction materials and contracting
161,977

4,294

(20,582
)
Construction services
229,806

1,574

11,664

Other
334

1,818

305

 
507,480

17,498

11,671

Intersegment eliminations

(36,216
)

Total
$
931,604

$

$
56,344