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v3.23.2

Business segment data (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | $ 1,091,126 |  | $ 1,009,749 |  | $ 2,521,224 | $ 2,116,864
Operating income | 82,031 |  | 62,505 |  | 200,553 | 170,000
Income from continuing operations | 147,633 |  | 35,762 |  | 231,508 | 104,528
Discontinued operations, net of tax | (16,941) |  | 34,905 |  | (62,464) | (2,098)
Net income | 130,692 | $ 38,353 | 70,667 | $ 31,763 | 169,044 | 102,430
Electric |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 90,989 |  | 85,551 |  | 186,686 | 179,235
Operating income | 21,561 |  | 8,325 |  | 42,654 | 23,369
Natural gas distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 218,995 |  | 210,510 |  | 784,590 | 660,998
Operating income | 2,428 |  | (638) |  | 60,932 | 55,617
Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 34,209 |  | 29,818 |  | 48,683 | 40,938
Operating income | 13,886 |  | 12,602 |  | 26,926 | 24,484
Construction services |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 746,933 |  | 683,870 |  | 1,501,265 | 1,235,693
Operating income | 54,310 |  | 46,141 |  | 89,527 | 75,639
Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 0 |  | 0 |  | 0 | 0
Operating income | (10,154) |  | (3,925) |  | (19,486) | (9,109)
Intersegment eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | (11,165) |  | (10,875) |  | (39,105) | (39,183)
Intersegment eliminations | Electric |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | (27) |  | (34) |  | (55) | (68)
Intersegment eliminations | Natural gas distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | (69) |  | (71) |  | (139) | (137)
Intersegment eliminations | Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | (7,918) |  | (7,787) |  | (34,188) | (33,729)
Intersegment eliminations | Construction services |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 0 |  | (1,527) |  | 0 | (2,353)
Intersegment eliminations | Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | (3,151) |  | (1,456) |  | (4,723) | (2,896)
Total intersegment operating revenues |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 11,165 |  | 10,875 |  | 39,105 | 39,183
Regulated operation |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 340,492 |  | 323,616 |  | 1,014,423 | 877,233
Income from continuing operations | 21,832 |  | 4,429 |  | 86,296 | 60,047
Regulated operation | Electric |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 90,989 |  | 85,551 |  | 186,686 | 179,235
Income from continuing operations | 16,338 |  | 4,601 |  | 32,945 | 15,880
Regulated operation | Natural gas distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 218,995 |  | 210,510 |  | 784,590 | 660,998
Income from continuing operations | (3,157) |  | (7,498) |  | 35,771 | 28,817
Regulated operation | Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 30,508 |  | 27,555 |  | 43,147 | 37,000
Income from continuing operations | 8,651 |  | 7,326 |  | 17,580 | 15,350
Regulated operation | Intersegment eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 7,795 |  | 7,509 |  | 34,152 | 33,543
Regulated operation | Intersegment eliminations | Electric |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 27 |  | 34 |  | 55 | 68
Regulated operation | Intersegment eliminations | Natural gas distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 69 |  | 71 |  | 139 | 137
Regulated operation | Intersegment eliminations | Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 7,699 |  | 7,404 |  | 33,958 | 33,338
Nonregulated operation |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 750,634 |  | 686,133 |  | 1,506,801 | 1,239,631
Income from continuing operations | 125,801 |  | 31,333 |  | 145,212 | 44,481
Nonregulated operation | Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 3,701 |  | 2,263 |  | 5,536 | 3,938
Income from continuing operations | 286 |  | (57) |  | (172) | (674)
Nonregulated operation | Construction services |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 746,933 |  | 683,870 |  | 1,501,265 | 1,235,693
Income from continuing operations | 41,167 |  | 35,324 |  | 69,976 | 57,349
Nonregulated operation | Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 0 |  | 0 |  | 0 | 0
Income from continuing operations | 84,348 |  | (3,934) |  | 75,408 | (12,194)
Nonregulated operation | Intersegment eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 3,370 |  | 3,366 |  | 4,953 | 5,640
Nonregulated operation | Intersegment eliminations | Pipeline |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 219 |  | 336 |  | 230 | 391
Nonregulated operation | Intersegment eliminations | Construction services |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | 0 |  | 1,527 |  | 0 | 2,353
Nonregulated operation | Intersegment eliminations | Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenues | $ 3,151 |  | $ 1,503 |  | $ 4,723 | $ 2,896

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