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Commitments (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) ServiceLine | Dec. 31, 2019 USD ($)
Commitments [Abstract] |  |
Percentage of employees under union contract | 33.00% |
Company-Owned Lead Service Lines [Member] |  |
Commitments [Abstract] |  |
Term to replace all remaining company-owned lead service lines | 4 years |
Costs incurred to replace company-owned lead service lines | $ 2,740 | $ 2,713
Customer-Owned Lead Service Lines [Member] |  |
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 | $ 1,204 | $ 1,000
Costs to be incurred to replace customer-owned lead service lines | 1,500 |
Construction and Acquisition Expenditures [Member] |  |
Capital Commitments [Abstract] |  |
Commitment for 2021 | 36,000 |
Commitment for 2022 | $ 40,000 |

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- Definition Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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- Definition Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121594574&loc=d3e44360-110383 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Definition Amount of costs incurred to date for replacing all of the remaining known company-owned lead service lines. + References No definition available. + 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 Percentage of the entity's employees that are under union contract. + 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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- Definition Period of time within which the Company will replace all of the remaining company-owned lead 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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