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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Schedule of Property, Plant and Equipment | The major components of depreciable plant and equipment as of December 31, 2023 and 2022 are as follows:
| 2023 |  | 2022
Source of supply | $ | 207,537 |  |  | 191,082 |
Pumping plant | 284,308 |  |  | 269,246 |
Water treatment plant | 354,617 |  |  | 327,492 |
Transmission and distribution plant | 2,820,358 |  |  | 2,615,640 |
General plant | 301,091 |  |  | 257,825 |
Total depreciable plant and equipment | $ | 3,967,911 |  |  | 3,661,285 |
Depreciation is computed using the straight-line method over the estimated remaining service lives of groups of assets. The estimated service lives of depreciable plant and equipment are as follows:
| Useful Lives
Source of supply | 20 to 100 years
Pumping plant | 5 to 70 years
Water treatment plant | 5 to 50 years
Transmission and distribution plant | 10 to 100 years
General plant | 4 to 61 years
Schedule of Real Estate Investments | The major components of nonutility properties and real estate investments are as follows as of December 31:
| 2023 |  | 2022
Land | $ | 4,137 |  |  | 12,615 |
Wholesale water supply assets | 8,465 |  |  | — |
Buildings and improvements | 748 |  |  | 45,418 |
Subtotal | 13,350 |  |  | 58,033 |
Less: accumulated depreciation and amortization | 194 |  |  | 17,158 |
Total | $ | 13,156 |  |  | 40,875 |
The following represents the major components of the Tennessee warehouse building and land property recorded in assets held-for-sale on the Consolidated Balance Sheets as of December 31, 2023:
| 2023
Land | $ | 13,170 |
Buildings and improvements | 44,950 |
Subtotal | 58,120 |
Less: accumulated depreciation and amortization | 17,270 |
Total | $ | 40,850 |
Schedule of Future Minimum Rental Payments to be Received | The following schedule shows the future minimum rental payments to be received from third parties under operating leases that have remaining noncancelable lease terms in excess of one year as of December 31, 2023:
Year ending December 31: | Rental Revenue
2024 | $ | 4,758 |
2025 | 5,063 |
2026 | 5,290 |
2027 | 3,990 |
2028 | 1,679 |
Thereafter | — |
Schedule of Estimated Refunds of Advances for Construction and Contributions in Aid of Construction | Estimated refunds for the next five years and thereafter are shown below:
| Estimated Refunds
2024 | $ | 3,034 |
2025 | 2,970 |
2026 | 2,878 |
2027 | 2,793 |
2028 | 2,726 |
Thereafter | 46,574 |
Schedule of Asset Retirement Obligations | As of December 31, 2023 and 2022, the asset retirement obligation is as follows:
| 2023 |  | 2022
Estimated future retirement costs | $ | 4,198 |  |  | 4,426 |
Discount rate | 6 | % |  | 6 | %
Retirement obligation, present value | $ | 862 |  |  | 920 |
Schedule of Disaggregation of Revenue | Detail of SJW Group’s revenue is as follows for the years ended December 31:
| 2023 |  | 2022 |  | 2021
Revenue from contracts with customers | $ | 678,168 |  |  | 586,918 |  |  | 559,568 |
Alternative revenue programs, net | 3,634 |  |  | (1,312) |  |  | 5,304 |
Other balancing and memorandum accounts and regulatory mechanisms, net | (17,123) |  |  | 29,487 |  |  | 3,435 |
Rental income | 5,684 |  |  | 5,605 |  |  | 5,379 |
| $ | 670,363 |  |  | 620,698 |  |  | 573,686 |

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