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Regulatory Matters - Regulatory Assets, Net (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Regulatory assets: |  |
Total regulatory assets | $ 242,227 | $ 240,186
Less: current regulatory asset | 18,172 | 4,276
Regulatory assets, less current portion | 224,055 | 235,910
Regulatory liabilities: |  |
Regulatory Liabilities | 484,841 | 464,167
Less: current regulatory liabilities | 1,122 | 3,059
Total regulatory liabilities, less current portion | $ 483,719 | 461,108
Minimum |  |
Regulatory liabilities: |  |
General plant | 5 years |
Maximum |  |
Regulatory liabilities: |  |
General plant | 68 years |
Estimated service lives of assets | 100 years |
Cost of removal |  |
Regulatory liabilities: |  |
Regulatory Liabilities | $ 364,398 | 346,418
Future income tax benefits due to customers |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 84,128 | 88,610
Unrecognized pensions and other postretirement benefits |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 27,872 | 20,196
Employee benefit costs |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 1,137 | 0
Revenue adjustment mechanisms |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 1,122 | 5,536
Water supply costs |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 3,386 | 0
Other |  |
Regulatory liabilities: |  |
Regulatory Liabilities | 2,798 | 3,407
Future income tax benefits due to customers |  |
Regulatory assets: |  |
Total regulatory assets | 180,103 | 157,669
Unrecognized pensions and other postretirement benefits |  |
Regulatory assets: |  |
Total regulatory assets | 3,177 | 24,593
Business combinations debt premium |  |
Regulatory assets: |  |
Total regulatory assets | 12,313 | 14,855
Employee benefit costs |  |
Regulatory assets: |  |
Total regulatory assets | 6,370 | 9,815
MWRAM |  |
Regulatory assets: |  |
Total regulatory assets | 9,985 | 9,361
Customer Assistance Program (“CAP”) balancing account |  |
Regulatory assets: |  |
Total regulatory assets | 6,599 | 5,457
Catastrophic event memorandum accounts (“CEMA”) |  |
Regulatory assets: |  |
Total regulatory assets | 986 | 4,819
2022 general rate case interim memorandum account |  |
Regulatory assets: |  |
Total regulatory assets | 3,392 | 4,571
Revenue adjustment mechanisms |  |
Regulatory assets: |  |
Total regulatory assets | 5,024 | 0
Water supply costs |  |
Regulatory assets: |  |
Total regulatory assets | 0 | 583
Other |  |
Regulatory assets: |  |
Total regulatory assets | $ 14,278 | $ 8,463

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- Definition Useful life of assets common to business units owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
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