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Business segment data (Tables)
 9 Months Ended
Sep. 30, 2015
Segment Reporting [Abstract]  
Information on the Company's businesses
Information on the Company's businesses was as follows:
 
Three Months Ended
Nine Months Ended
 
September 30,
September 30,
 
2015

2014

2015

2014

 
(In thousands)
External operating revenues:
 
 
 
 
Regulated operations:
 
 
 
 
Electric
$
74,604

$
68,936

$
210,646

$
207,732

Natural gas distribution
89,520

96,185

553,058

616,496

Pipeline and energy services
21,100

19,672

43,282

39,341

 
185,224

184,793

806,986

863,569

Nonregulated operations:
 
 
 
 
Pipeline and energy services
96,896

17,168

174,732

47,028

Construction materials and contracting
774,288

740,496

1,475,585

1,339,371

Construction services
223,676

270,313

670,594

815,313

Other
416

433

1,167

1,248

 
1,095,276

1,028,410

2,322,078

2,202,960

Total external operating revenues
$
1,280,500

$
1,213,203

$
3,129,064

$
3,066,529

 
 
 
 
 
 
Three Months Ended
Nine Months Ended
 
September 30,
September 30,
 
2015

2014

2015

2014

 
(In thousands)
Intersegment operating revenues:
 

 

 

 

Regulated operations:
 
 
 
 
Electric
$
—

$
—

$
—

$
—

Natural gas distribution
—

—

—

—

Pipeline and energy services
3,740

3,728

31,365

27,938

 
3,740

3,728

31,365

27,938

Nonregulated operations:
 
 
 
 
Pipeline and energy services
145

174

460

544

Construction materials and contracting
244

6,322

2,450

18,445

Construction services
2,112

16,420

17,298

27,431

Other
2,379

2,601

5,943

6,069

 
4,880

25,517

26,151

52,489

Intersegment eliminations
(8,620
)
(29,245
)
(57,516
)
(80,427
)
Total intersegment operating revenues
$
—

$
—

$
—

$
—

 
 
 
 
 
Earnings (loss) on common stock:
 

 

 

 

Regulated operations:
 
 
 
 
Electric
$
12,605

$
9,162

$
26,842

$
28,018

Natural gas distribution
(12,298
)
(12,252
)
3,777

10,516

Pipeline and energy services
5,392

3,887

15,077

10,499

 
5,699

797

45,696

49,033

Nonregulated operations:
 
 
 
 
Pipeline and energy services
(14,903
)
1,173

(22,175
)
4,699

Construction materials and contracting
68,823

55,218

74,324

42,199

Construction services
4,742

9,876

16,505

40,751

Other
(1,380
)
(864
)
(9,537
)
(7,623
)
 
57,282

65,403

59,117

80,026

Intersegment eliminations
26

(1,644
)
(1,649
)
(3,070
)
Earnings on common stock before income (loss) from
discontinued operations
63,007

64,556

103,164

125,989

Income (loss) from discontinued operations, net of tax
(202,626
)
38,482

(778,647
)
87,475

Total earnings (loss) on common stock
$
(139,619
)
$
103,038

$
(675,483
)
$
213,464