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Business segment data (Tables) | 9 Months Ended
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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 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8736-108599 + Details
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