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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