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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2025
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Revenues disaggregated by revenue source were as follows for the years ended December 31:
(In thousands) |  |  |
Electric revenues |  | 2025 |  |  | 2024 |  |  | 2023 |
Residential |  | $ | 187,264 |  |  | $ | 174,756 |  |  | $ | 171,137 |
Commercial |  |  | 258,044 |  |  |  | 255,240 |  |  |  | 252,268 |
Industrial |  |  | 12,330 |  |  |  | 12,948 |  |  |  | 13,759 |
Other-retail/municipal |  |  | 40,048 |  |  |  | 40,796 |  |  |  | 40,815 |
Total retail |  |  | 497,686 |  |  |  | 483,740 |  |  |  | 477,979 |
Sales to the market |  |  | 30,654 |  |  |  | 10,893 |  |  |  | 10,163 |
Other revenues |  |  | 3,214 |  |  |  | 3,040 |  |  |  | 1,587 |
Total electric revenues |  |  | 531,554 |  |  |  | 497,673 |  |  |  | 489,729 |
Gas revenues |  |  |  |  |  |  |  |  |
Residential |  |  | 123,719 |  |  |  | 106,150 |  |  |  | 116,640 |
Commercial/Industrial |  |  | 80,560 |  |  |  | 65,021 |  |  |  | 75,410 |
Total retail |  |  | 204,279 |  |  |  | 171,171 |  |  |  | 192,050 |
Gas transportation |  |  | 6,582 |  |  |  | 6,905 |  |  |  | 7,399 |
Other revenues |  |  | 562 |  |  |  | 511 |  |  |  | 563 |
Total gas revenues |  |  | 211,423 |  |  |  | 178,587 |  |  |  | 200,012 |
Non-regulated energy revenues |  |  | 677 |  |  |  | 684 |  |  |  | 690 |
Total Operating Revenue |  | $ | 743,654 |  |  | $ | 676,944 |  |  | $ | 690,431 |

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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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