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Intangible Assets | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible Assets Utility plant intangible assets consist of a concession fee paid to the City of Cupertino of $6,800 for operating the City of Cupertino municipal water system, $13,400 related to the purchase premium for customer relationships and other intangibles of $15,746 as of December 31, 2023. Other intangibles primarily consist of $5,984 for infrastructure related to the Cupertino service concession arrangement, $4,292 which was paid for service area and water rights by TWC, $1,400 for customer relationships and $1,040 incurred in conjunction with Valley Water water contracts related to the operation of SJWC. The nonutility other intangible asset represents water rights with an indefinite life. Amortization expense for the intangible assets was $1,310, $3,869 and $1,553 for the years ended December 31, 2023, 2022 and 2021, respectively. Amortization expense for 2024 through 2028 and thereafter is anticipated to be approximately $1,310 per year. The costs of intangible assets as of December 31, 2023 and 2022 are as follows:
| 2023 |  | 2022
Utility Plant Intangible Assets: |  |  |
Concession fees | $ | 6,800 |  |  | 6,800 |
Purchase premium customer relationships | 13,400 |  |  | 13,400 |
Other intangibles | 15,746 |  |  | 15,759 |
Utility plant intangible assets | 35,946 |  |  | 35,959 |
Less: Accumulated amortization |  |  |
Concession fees | 6,754 |  |  | 6,693 |
Purchase premium customer relationships | 3,774 |  |  | 2,881 |
Other intangibles | 10,361 |  |  | 10,018 |
Utility plant net intangible assets | $ | 15,057 |  |  | 16,367 |
Other Intangible Asset: |  |  |
Water rights | $ | 28,386 |  |  | — |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350-30/tableOfContent + Details
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