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Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | $ 226,665 | $ 194,206 | $ 381,566 | $ 339,431
Regulatory balancing account revenue | 17,634 | (162) | 133,482 | (14,287)
Total operating revenue | 244,299 | 194,044 | 515,048 | 325,144
Total non-regulated revenue | 5,513 | 4,485 | 10,611 | 9,108
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 122,251 | 108,741 | 214,744 | 192,775
Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 41,906 | 37,846 | 76,455 | 69,820
Multiple residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 18,043 | 16,504 | 34,912 | 31,501
Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 7,119 | 5,874 | 13,759 | 11,508
Public authorities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 10,918 | 8,991 | 17,880 | 15,416
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 26,428 | 16,250 | 23,816 | 18,411
Operating and maintenance revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 3,188 | 3,075 | 6,436 | 6,310
Other non-regulated revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 1,720 | 800 | 2,949 | 1,582
Non-regulated revenue from contracts with customers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 4,908 | 3,875 | 9,385 | 7,892
Lease revenue | 605 | 610 | 1,226 | 1,216
Total non-regulated revenue | $ 5,513 | $ 4,485 | $ 10,611 | $ 9,108

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