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Regulatory Assets and Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2025
Regulated Operations [Abstract] |
Schedule of Regulatory Assets and Liabilities | Regulatory assets and liabilities were comprised of the following as of March 31, 2025 and December 31, 2024:
| Recovery Period |  | March 31, 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 |  | 41,690 |  |  | 46,278 |
Asset retirement obligations, net | Indefinite |  | 29,599 |  |  | 28,883 |
MWRAM long-term regulatory asset | 1 - 2 years |  | 28,750 |  |  | 16,353 |
Other accrued benefits | Indefinite |  | 26,671 |  |  | 25,439 |
Tank coating | Various |  | 20,822 |  |  | 21,477 |
Customer Assistance Program and Rate Support Fund accounts receivable | 1 year |  | 10,529 |  |  | 9,910 |
General District Balancing Account receivable | Various |  | 9,499 |  |  | 9,393 |
Incremental Cost Balancing Accounts (ICBA) | 1 year |  | 8,023 |  |  | 8,251 |
Net WRAM and Modified Cost Balancing Account (MCBA) long-term accounts receivable | Various |  | 3,460 |  |  | 3,633 |
Recoverable property losses | Various |  | 2,463 |  |  | 2,633 |
Other regulatory assets | Various |  | 7,446 |  |  | 6,877 |
Total Regulatory Assets |  |  | $ | 367,231 |  |  | $ | 357,406 |
Regulatory Liabilities |  |  |  |  |
Cost of removal |  |  | $ | 493,688 |  |  | $ | 483,108 |
Pension and retiree group health |  |  | 174,341 |  |  | 174,708 |
Future tax benefits due to customers |  |  | 105,402 |  |  | 106,184 |
Other components of net periodic benefit cost |  |  | 19,645 |  |  | 18,287 |
Pension Cost Balancing Account |  |  | 15,091 |  |  | 14,143 |
ICBA |  |  | 5,700 |  |  | 6,003 |
Health Cost Balancing Account |  |  | 4,458 |  |  | 3,630 |
Conservation Expense Balancing Account |  |  | 3,199 |  |  | 3,294 |
Net WRAM and MCBA long-term payable |  |  | 3,075 |  |  | 3,064 |
Other regulatory liabilities |  |  | 1,996 |  |  | 2,130 |
Total Regulatory Liabilities |  |  | $ | 826,595 |  |  | $ | 814,551 |

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