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Utility Plant and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2022
Utility Plant and Intangible Assets |
Schedule of Public Utility Property Plant and Equipment Components [Table Text Block] | The following table shows Registrant’s utility plant (regulated utility plant and non-regulated utility property) by major asset class:
|  | AWR December 31, |  | GSWC December 31,
(dollars in thousands) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Water |  |  |  |  |  |  |  |
Land |  | $ | 18,427 |  |  | $ | 18,207 |  |  | $ | 18,427 |  |  | $ | 18,207 |
Intangible assets |  | 30,511 |  |  | 29,028 |  |  | 30,511 |  |  | 29,028 |
Source of water supply |  | 109,918 |  |  | 98,244 |  |  | 109,918 |  |  | 98,244 |
Pumping |  | 227,668 |  |  | 209,936 |  |  | 227,668 |  |  | 209,936 |
Water treatment |  | 90,411 |  |  | 83,922 |  |  | 90,411 |  |  | 83,922 |
Transmission and distribution |  | 1,431,437 |  |  | 1,356,649 |  |  | 1,431,437 |  |  | 1,356,649 |
Other |  | 136,162 |  |  | 139,895 |  |  | 98,096 |  |  | 102,831 |
|  | 2,044,534 |  |  | 1,935,881 |  |  | 2,006,468 |  |  | 1,898,817 |
Electric (Note 20) |  |  |  |  |  |  |  |
Transmission and distribution |  | 105,499 |  |  | 90,491 |  |  | — |  |  | — |
Generation |  | 12,583 |  |  | 12,583 |  |  | — |  |  | — |
Other (1) |  | 15,733 |  |  | 13,398 |  |  | — |  |  | — |
|  | 133,815 |  |  | 116,472 |  |  | — |  |  | — |
Less — accumulated depreciation |  | (606,231) |  |  | (594,264) |  |  | (530,925) |  |  | (522,672) |
Construction work in progress |  | 181,648 |  |  | 167,915 |  |  | 141,175 |  |  | 123,600 |
Net utility plant |  | $ | 1,753,766 |  |  | $ | 1,626,004 |  |  | $ | 1,616,718 |  |  | $ | 1,499,745 |
(1) Includes intangible assets of $1.2 million for the years ended December 31, 2022 and 2021 for studies performed in association with the electric segment.
Schedule of components of intangible assets | As of December 31, 2022 and 2021, intangible assets consist of the following:
|  | Weighted Average Amortization |  | AWR December 31, |  | GSWC December 31,
(dollars in thousands) |  | Period |  | 2022 |  | 2021 |  | 2022 |  | 2021
Intangible assets: |  |  |  |  |  |  |  |  |  |
Conservation programs |  | 3 years |  | $ | 9,486 |  |  | $ | 9,486 |  |  | $ | 9,486 |  |  | $ | 9,486 |
Water and service rights (2) |  | 30 years |  | 8,695 |  |  | 8,695 |  |  | 8,124 |  |  | 8,124 |
Water planning studies |  | 14 years |  | 13,757 |  |  | 12,258 |  |  | 12,519 |  |  | 11,019 |
Total intangible assets |  |  |  | 31,938 |  |  | 30,439 |  |  | 30,129 |  |  | 28,629 |
Less — accumulated amortization |  |  |  | (26,811) |  |  | (26,401) |  |  | (25,374) |  |  | (25,109) |
Intangible assets, net of amortization |  |  |  | $ | 5,127 |  |  | $ | 4,038 |  |  | $ | 4,755 |  |  | $ | 3,520 |
Intangible assets not subject to amortization (3) |  |  |  | $ | 383 |  |  | $ | 400 |  |  | $ | 382 |  |  | $ | 399 |
Schedule of estimated future consolidated amortization expenses related to intangible assets | Estimated future consolidated amortization expense related to intangible assets are as follows (in thousands):
|  | Amortization Expense
2023 |  | $ | 641 |
2024 |  | 641 |
2025 |  | 641 |
2026 |  | 641 |
2027 |  | 641 |
Total |  | $ | 3,205 |
Schedule of reconciliation of the beginning and ending aggregate carrying amount of the asset retirement obligations | The following is a reconciliation of the beginning and ending aggregate carrying amount of asset retirement obligations, which are included in “Other Credits” on the balance sheets as of December 31, 2022 and 2021:
(dollars in thousands) |  | GSWC
Obligation at December 31, 2020 |  | $ | 9,320 |
Additional liabilities incurred |  | 148 |
Liabilities settled |  | (120) |
Accretion |  | 369 |
Obligation at December 31, 2021 |  | $ | 9,717 |
Accretion |  | 386 |
Obligation at December 31, 2022 |  | $ | 10,103 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of indefinite and finite lived intangible assets by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the entity. + References No definition available. + Details
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