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Regulatory Assets and Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2025
Regulated Operations [Abstract] |
Schedule of Regulatory Assets and Liabilities | Regulatory assets and liabilities were comprised of the following as of June 30, 2025 and December 31, 2024:
| Recovery Period |  | June 30, 2025 |  | December 31, 2024
Regulatory Assets |  |  |  |  |
Property-related temporary differences (tax benefits flowed through to customers) | Indefinite |  | $ | 178,279 |  |  | $ | 178,279 |
IRMA long-term accounts receivable | Various |  | 35,084 |  |  | 46,278 |
MWRAM long-term regulatory asset | 1 - 2 years |  | 31,308 |  |  | 16,353 |
Asset retirement obligations, net | Indefinite |  | 30,322 |  |  | 28,883 |
Other accrued benefits | Indefinite |  | 26,702 |  |  | 25,439 |
Tank coating | Various |  | 19,753 |  |  | 21,477 |
General District Balancing Account receivable | Various |  | 9,609 |  |  | 9,393 |
Customer Assistance Program and Rate Support Fund accounts receivable | 1 year |  | 8,767 |  |  | 9,910 |
Incremental Cost Balancing Accounts (ICBA) | 1 year |  | 6,708 |  |  | 8,251 |
Net WRAM and Modified Cost Balancing Account (MCBA) long-term accounts receivable | Various |  | 3,657 |  |  | 3,633 |
Recoverable property losses | Various |  | 2,297 |  |  | 2,633 |
Other regulatory assets | Various |  | 7,433 |  |  | 6,877 |
Total Regulatory Assets |  |  | $ | 359,919 |  |  | $ | 357,406 |
Regulatory Liabilities |  |  |  |  |
Cost of removal |  |  | $ | 503,820 |  |  | $ | 483,108 |
Pension and retiree group health |  |  | 173,964 |  |  | 174,708 |
Future tax benefits due to customers |  |  | 104,861 |  |  | 106,184 |
Other components of net periodic benefit cost |  |  | 21,194 |  |  | 18,287 |
Pension Cost Balancing Account |  |  | 16,048 |  |  | 14,143 |
PFAS settlement proceeds |  |  | 8,458 |  |  | — |
ICBA |  |  | 4,884 |  |  | 6,003 |
Health Cost Balancing Account |  |  | 4,341 |  |  | 3,630 |
Net WRAM and MCBA long-term payable |  |  | 3,089 |  |  | 3,064 |
Conservation Expense Balancing Account |  |  | 2,889 |  |  | 3,294 |
Other regulatory liabilities |  |  | 2,109 |  |  | 2,130 |
Total Regulatory Liabilities |  |  | $ | 845,657 |  |  | $ | 814,551 |

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