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Commitments And Contingencies (Narrative) (Details) $ in Thousands |  | 1 Months Ended | 2 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 03, 2019 item | Feb. 28, 2025 USD ($) | Aug. 31, 2025 USD ($) | Sep. 30, 2025 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |
Aggregate amount accrued for loss contingencies |  |  |  | $ 22,429
Amount probable of recovery through insurance |  |  |  | 769
Insurance reserve for employee medical benefit program |  |  |  | 4,934
Number of individuals commenced action against company | item | 2 |  |  |
Insurance proceeds |  | $ 5,602 | $ 39,844 |
Other Water And Wastewater Subsidiaries [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Insurance proceeds |  |  |  | 31,068
Virginia Water And Wastewater Subsidiaries [Member] | North Carolina [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Insurance proceeds |  |  |  | $ 8,776

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