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Revenue from contracts with customers (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of revenue | In the following tables, revenue is disaggregated by the type of customer or service provided. The Company believes this level of disaggregation best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The table also includes a reconciliation of the disaggregated revenue by reportable segments. For more information on the Company's business segments, see Note 15.
Three Months Ended September 30, 2025 | Electric | Natural gas distribution | Pipeline | Other | Total
| (In thousands)
Residential utility sales | $ | 35,730 |  | $ | 64,225 |  | $ | — |  | $ | — |  | $ | 99,955 |
Commercial utility sales | 52,492 |  | 45,581 |  | — |  | — |  | 98,073 |
Industrial utility sales | 9,525 |  | 7,873 |  | — |  | — |  | 17,398 |
Other utility sales | 1,949 |  | — |  | — |  | — |  | 1,949 |
Natural gas transportation | — |  | 16,292 |  | 47,239 |  | — |  | 63,531 |
Natural gas storage | — |  | — |  | 5,680 |  | — |  | 5,680 |
Other | 19,118 |  | 7,983 |  | 4,439 |  | 182 |  | 31,722 |
Intersegment eliminations | (138) |  | (92) |  | (4,269) |  | (182) |  | (4,681) |
Revenues from contracts with customers | 118,676 |  | 141,862 |  | 53,089 |  | — |  | 313,627 |
Other revenues | (1,014) |  | 2,353 |  | 70 |  | — |  | 1,409 |
Total external operating revenues | $ | 117,662 |  | $ | 144,215 |  | $ | 53,159 |  | $ | — |  | $ | 315,036 |
Three Months Ended September 30, 2024 | Electric | Natural gas distribution | Pipeline | Other | Total
| (In thousands)
Residential utility sales | $ | 37,076 |  | $ | 61,928 |  | $ | — |  | $ | — |  | $ | 99,004 |
Commercial utility sales | 46,648 |  | 37,687 |  | — |  | — |  | 84,335 |
Industrial utility sales | 9,702 |  | 6,869 |  | — |  | — |  | 16,571 |
Other utility sales | 2,045 |  | — |  | — |  | — |  | 2,045 |
Natural gas transportation | — |  | 15,279 |  | 41,936 |  | — |  | 57,215 |
Natural gas storage | — |  | — |  | 6,053 |  | — |  | 6,053 |
Other | 16,182 |  | 9,736 |  | 3,537 |  | 22 |  | 29,477 |
Intersegment eliminations | (12) |  | (31) |  | (3,924) |  | (21) |  | (3,988) |
Revenues from contracts with customers | 111,641 |  | 131,468 |  | 47,602 |  | 1 |  | 290,712 |
Other revenues | (3,173) |  | 2,122 |  | 33 |  | — |  | (1,018) |
Total external operating revenues | $ | 108,468 |  | $ | 133,590 |  | $ | 47,635 |  | $ | 1 |  | $ | 289,694 |
Nine Months Ended September 30, 2025 | Electric | Natural gas distribution | Pipeline | Other | Total
| (In thousands)
Residential utility sales | $ | 103,984 |  | $ | 453,501 |  | $ | — |  | $ | — |  | $ | 557,485 |
Commercial utility sales | 144,397 |  | 303,611 |  | — |  | — |  | 448,008 |
Industrial utility sales | 27,936 |  | 32,433 |  | — |  | — |  | 60,369 |
Other utility sales | 5,592 |  | — |  | — |  | — |  | 5,592 |
Natural gas transportation | — |  | 49,816 |  | 142,612 |  | — |  | 192,428 |
Natural gas storage | — |  | — |  | 16,882 |  | — |  | 16,882 |
Other | 53,832 |  | 43,086 |  | 10,778 |  | 540 |  | 108,236 |
Intersegment eliminations | (457) |  | (278) |  | (47,401) |  | (540) |  | (48,676) |
Revenues from contracts with customers | 335,284 |  | 882,169 |  | 122,871 |  | — |  | 1,340,324 |
Other revenues | (7,476) |  | 8,088 |  | 119 |  | — |  | 731 |
Total external operating revenues | $ | 327,808 |  | $ | 890,257 |  | $ | 122,990 |  | $ | — |  | $ | 1,341,055 |
Nine Months Ended September 30, 2024 | Electric | Natural gas distribution | Pipeline | Other | Total
| (In thousands)
Residential utility sales | $ | 107,735 |  | $ | 431,721 |  | $ | — |  | $ | — |  | $ | 539,456 |
Commercial utility sales | 129,783 |  | 264,091 |  | — |  | — |  | 393,874 |
Industrial utility sales | 32,809 |  | 30,716 |  | — |  | — |  | 63,525 |
Other utility sales | 6,046 |  | — |  | — |  | — |  | 6,046 |
Natural gas transportation | — |  | 43,194 |  | 128,979 |  | — |  | 172,173 |
Natural gas storage | — |  | — |  | 16,766 |  | — |  | 16,766 |
Other | 44,998 |  | 18,705 |  | 9,903 |  | 82 |  | 73,688 |
Intersegment eliminations | (71) |  | (108) |  | (43,249) |  | (64) |  | (43,492) |
Revenues from contracts with customers | 321,300 |  | 788,319 |  | 112,399 |  | 18 |  | 1,222,036 |
Revenues out of scope | (5,915) |  | 6,200 |  | 119 |  | — |  | 404 |
Total external operating revenues | $ | 315,385 |  | $ | 794,519 |  | $ | 112,518 |  | $ | 18 |  | $ | 1,222,440 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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