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General - Schedule of SJW Group's Revenue Components (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accounting Policies [Abstract] |  |  |  |
Revenue from contracts with customers | $ 173,106 | $ 159,724 | $ 323,114 | $ 295,560
Alternative revenue programs, net | 1,314 | (2,204) | (523) | (3,595)
Other balancing and memorandum accounts and regulatory mechanisms, net | 977 | (2,050) | 413 | (646)
Rental income | 777 | 1,416 | 2,552 | 2,863
Operating revenue | $ 176,174 | $ 156,886 | $ 325,556 | $ 294,182

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