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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, 2022
Dec. 31, 2021
Estimated Refunds of Advances for Construction [Abstract]    
2023 $ 3,372  
2024 3,332  
2025 3,135  
2026 2,931  
2027 2,749  
Thereafter 47,370  
Advances for construction 137,696 $ 130,693
Customer advances for construction, non-refundable 46,380  
Customer advances for construction, refunded on service connections $ 28,427  
Contract with customer, refund period 40 years  
Contract with customer, fair value of advances $ 44,715 $ 51,067
Amortization period for taxes paid relating to advances and contributions 40 years