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Business segment data (Tables)
 6 Months Ended
Jun. 30, 2015
Segment Reporting [Abstract]  
Information on the Company's businesses
Information on the Company's businesses was as follows:
 
Three Months Ended
Six Months Ended
 
June 30,
June 30,
 
2015
2014
2015
2014
 
(In thousands)
External operating revenues:
 
 
 
 
Regulated operations:
 
 
 
 
Electric
$
64,265

$
65,149

$
136,041

$
138,796

Natural gas distribution
132,965

146,077

463,538

520,311

Pipeline and energy services
18,242

15,246

22,183

19,668

 
215,472

226,472

621,762

678,775

Nonregulated operations:
 
 
 
 
Pipeline and energy services
63,131

16,044

77,834

29,859

Construction materials and contracting
495,640

434,452

701,298

598,875

Construction services
211,515

275,109

446,918

545,002

Other
457

487

752

815

 
770,743

726,092

1,226,802

1,174,551

Total external operating revenues
$
986,215

$
952,564

$
1,848,564

$
1,853,326

 
 
 
 
 
Intersegment operating revenues:
 

 

 

 

Regulated operations:
 
 
 
 
Electric
$
—

$
—

$
—

$
—

Natural gas distribution
—

—

—

—

Pipeline and energy services
6,564

6,937

27,625

24,210

 
6,564

6,937

27,625

24,210

Nonregulated operations:
 
 
 
 
Pipeline and energy services
110

177

316

371

Construction materials and contracting
1,257

8,106

2,205

12,123

Construction services
3,491

7,273

15,186

11,010

Other
1,792

1,744

3,563

3,468

 
6,650

17,300

21,270

26,972

Intersegment eliminations
(13,214
)
(24,237
)
(48,895
)
(51,182
)
Total intersegment operating revenues
$
—

$
—

$
—

$
—

 
 
 
 
 
 
Three Months Ended
Six Months Ended
 
June 30,
June 30,
 
2015
2014
2015
2014
 
(In thousands)
Earnings (loss) on common stock:
 

 

 

 

Regulated operations:
 
 
 
 
Electric
$
5,910

$
7,823

$
14,237

$
18,856

Natural gas distribution
(5,375
)
(4,494
)
16,075

22,768

Pipeline and energy services
4,329

3,614

9,685

6,612

 
4,864

6,943

39,997

48,236

Nonregulated operations:
 
 
 
 
Pipeline and energy services
(5,933
)
2,175

(7,271
)
3,526

Construction materials and contracting
20,136

10,554

5,501

(13,019
)
Construction services
7,003

14,307

11,763

30,875

Other
(3,746
)
(2,971
)
(8,158
)
(6,758
)
 
17,460

24,065

1,835

14,624

Intersegment eliminations
(684
)
(954
)
(1,675
)
(1,427
)
Earnings on common stock before income (loss)
from discontinued operations
21,640

30,054

40,157

61,433

Income (loss) from discontinued operations, net of tax
(251,415
)
23,881

(576,020
)
48,993

Total earnings (loss) on common stock
$
(229,775
)
$
53,935

$
(535,863
)
$
110,426