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Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | $ 154,900 | $ 145,225
Regulatory balancing account revenue | 115,849 | (14,125)
Operating revenue | 270,749 | 131,100
Total non-regulated revenue | 5,098 | 4,623
Residential |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 92,492 | 84,035
Business |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 34,549 | 31,974
Multiple residential |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 16,869 | 14,997
Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 6,640 | 5,634
Public authorities |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 6,962 | 6,425
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | (2,612) | 2,160
Operating and maintenance revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 3,248 | 3,235
Other non-regulated revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,229 | 782
Non-regulated revenue from contracts with customers |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 4,477 | 4,017
Lease revenue | 621 | 606
Total non-regulated revenue | $ 5,098 | $ 4,623

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