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Summary of Significant Accounting Policies - Advances for Construction and Contributions in Aid of Construction (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Estimated Refunds of Advances for Construction [Abstract] |  |
2025 | $ 2,997 |
2026 | 2,898 |
2027 | 2,808 |
2028 | 2,741 |
2029 | 2,645 |
Thereafter | 44,406 |
Advances for construction | 155,397 | $ 146,582
Customer advances for construction, non-refundable | 64,920 |
Customer advances for construction, refunded on service connections | $ 31,983 |
Contract with customer, refund period | 40 years |
Contract with customer, fair value of advances | $ 43,718 | $ 40,915

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