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Commitments (Details) - Customer-Owned Lead Service Lines [Member] $ in Thousands | 9 Months Ended |
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Sep. 30, 2025 USD ($) ServiceLine | Dec. 31, 2024 USD ($)
Commitments [Abstract] |  |
Number of lead customer-owned service lines to be replaced annually | ServiceLine | 400 |
Term of tariff modification to replace customer-owned lead service lines | 9 years |
Recovery period of regulatory asset | 4 years |
Costs incurred to replace customer-owned lead service lines | $ 2,058 | $ 1,961
Costs to be incurred to replace customer-owned lead service lines | $ 2,100 |

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- Definition Remaining recovery period of regulatory assets for which no return on investment during recovery period is provided, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478098/980-340-55-2 + Details
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- Definition Amount of costs incurred to date for replacing all of the remaining customer-owned lead service lines connected to company-owned lead service lines under a four-year tariff modification. + References No definition available. + Details
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- Definition Amount of expected cost remaining for replacing all of the remaining customer-owned lead service lines connected to company-owned lead service lines under a nine-year tariff modification. + References No definition available. + Details
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- Definition Number of lead customer-owned service lines to be replaced annually whenever they are discovered. + References No definition available. + Details
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- Definition Term of consent order agreement with the Pennsylvania Department of Environmental Protection involving the replacement of lead customer-owned service lines regardless of material used for company-owned service lines, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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