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Business Segments - Schedule of Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Details of reportable segment |  |  |  |  |
Operating revenues | $ 161,782 | $ 151,696 | $ 452,361 | $ 470,519 |
Operating income (loss) | 55,068 | 51,751 | 145,790 | 161,861 |
Interest expense (income), net | 11,486 | 9,566 | 33,315 | 26,108 |
Net property, plant and equipment | 2,040,589 | 1,850,471 | 2,040,589 | 1,850,471 | $ 1,892,280
Depreciation and amortization | 10,849 | 10,184 | 32,341 | 31,645 |
Income tax expense (benefit) | 10,056 | 9,547 | 27,811 | 33,503 |
Capital additions | 64,179 | 47,482 | 173,477 | 136,131 |
AWR | Intersegment Eliminations |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 0 | 0 | 0 | 0 |
Operating income (loss) | (2) | 255 | (5) | 218 |
Interest expense (income), net | 1,365 | 1,637 | 4,677 | 4,389 |
Net property, plant and equipment | 0 | 0 | 0 | 0 |
Depreciation and amortization | 0 | 0 | 0 | 0 |
Income tax expense (benefit) | (732) | (559) | (1,691) | (1,586) |
Capital additions | 0 | 0 | 0 | 0 |
GOLDEN STATE WATER COMPANY |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 124,043 | 116,231 | 324,732 | 345,851 |
Operating income (loss) | 46,846 | 43,243 | 116,578 | 134,006 |
Net property, plant and equipment | 1,861,431 |  | 1,861,431 |  | $ 1,735,534
Depreciation and amortization | 9,070 | 8,610 | 27,147 | 26,890 |
Income tax expense (benefit) | 9,228 | 8,830 | 23,539 | 29,674 |
GOLDEN STATE WATER COMPANY | Water: |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 124,043 | 116,231 | 324,732 | 345,851 |
Public utilities property plant and equipment depreciation on transportation equipment |  |  |  | 200 |
GOLDEN STATE WATER COMPANY | Reportable Legal Entities | Water: |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 124,043 | 116,231 | 324,732 | 345,851 |
Operating income (loss) | 46,846 | 43,243 | 116,578 | 134,006 |
Interest expense (income), net | 8,358 | 6,775 | 24,381 | 18,784 |
Net property, plant and equipment | 1,861,431 | 1,696,923 | 1,861,431 | 1,696,923 |
Depreciation and amortization | 9,070 | 8,610 | 27,147 | 26,890 |
Income tax expense (benefit) | 9,228 | 8,830 | 23,539 | 29,674 |
Capital additions | 51,466 | 37,349 | 147,093 | 113,921 |
BVES | Electric: |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 9,040 | 8,956 | 29,948 | 30,688 |
BVES | Reportable Legal Entities | Electric: |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 9,040 | 8,956 | 29,948 | 30,688 |
Operating income (loss) | 2,042 | 2,049 | 6,416 | 7,783 |
Interest expense (income), net | 1,346 | 760 | 3,162 | 1,987 |
Net property, plant and equipment | 161,788 | 137,299 | 161,788 | 137,299 |
Depreciation and amortization | 944 | 776 | 2,721 | 2,283 |
Income tax expense (benefit) | 135 | (154) | 656 | 794 |
Capital additions | 11,862 | 9,947 | 23,023 | 20,985 |
ASUS | Reportable Legal Entities | Contracted services: |  |  |  |  |
Details of reportable segment |  |  |  |  |
Operating revenues | 28,699 | 26,509 | 97,681 | 93,980 |
Operating income (loss) | 6,182 | 6,204 | 22,801 | 19,854 |
Interest expense (income), net | 417 | 394 | 1,095 | 948 |
Net property, plant and equipment | 17,370 | 16,249 | 17,370 | 16,249 |
Depreciation and amortization | 835 | 798 | 2,473 | 2,472 |
Income tax expense (benefit) | 1,425 | 1,430 | 5,307 | 4,621 |
Capital additions | 851 | 186 | 3,361 | 1,225 |
Golden State Water Company and Bear Valley Electric Service Inc. |  |  |  |  |
Details of reportable segment |  |  |  |  |
Public utilities property plant and equipment depreciation on transportation equipment | $ 200 | $ 200 | $ 500 | $ 700 |

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