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v3.20.4

Business Segments (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 124,200 | $ 133,688 | $ 121,278 | $ 109,077 | $ 112,993 | $ 134,496 | $ 124,647 | $ 101,733 | $ 488,243 | $ 473,869 | $ 436,816
Operating Income | 29,277 | 39,807 | 35,716 | 25,699 | 24,724 | 42,724 | 39,430 | 20,195 | 130,499 | 127,073 | 100,983
Interest expense, net |  |  |  |  |  |  |  |  | (20,730) | (21,337) | (19,855)
Net utility plant | 1,512,043 |  |  |  | 1,415,705 |  |  |  | 1,512,043 | 1,415,705 | 1,296,310
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 36,850 | 35,397 | 40,425
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | 28,197 | 24,670 | 18,017
Capital additions |  |  |  |  |  |  |  |  | $ 130,423 | 151,940 | 126,561
Parent Company |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Operating revenues |  |  |  |  |  |  |  |  | $ 0 | 0 | 0
Operating Income |  |  |  |  |  |  |  |  | (9) | (9) | 7
Interest expense, net |  |  |  |  |  |  |  |  | (330) | (539) | (451)
Net utility plant | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | (208) | (709) | (525)
Capital additions |  |  |  |  |  |  |  |  | $ 0 | 0 | 0
GSWC |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 1 |  |
Operating revenues | 73,438 | 98,701 | 94,753 | 82,392 | 81,233 | 107,245 | 95,548 | 75,352 | $ 349,284 | 359,378 | 329,608
Operating Income | 17,480 | $ 33,149 | $ 30,175 | $ 22,092 | 18,746 | $ 36,982 | $ 34,037 | $ 15,327 | 102,896 | 105,092 | 80,562
Net utility plant | 1,400,489 |  |  |  | 1,394,742 |  |  |  | 1,400,489 | 1,394,742 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 32,184 | 32,441 | 38,395
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | 21,704 | 20,177 | 13,603
GSWC | Water Service Utility Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 330,637 | 319,830 | 295,258
Operating Income |  |  |  |  |  |  |  |  | 97,896 | 93,895 | 74,342
Interest expense, net |  |  |  |  |  |  |  |  | (20,312) | (20,304) | (18,403)
Net utility plant | 1,400,489 |  |  |  | 1,322,062 |  |  |  | 1,400,489 | 1,322,062 | 1,218,468
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 30,969 | 29,956 | 36,137
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | 20,515 | 17,295 | 12,391
Capital additions |  |  |  |  |  |  |  |  | 107,355 | 131,353 | 110,934
GSWC | Electric: |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 39,548 | 34,350
Operating Income |  |  |  |  |  |  |  |  |  | 11,197 | 6,220
Interest expense, net |  |  |  |  |  |  |  |  |  | (1,228) | (1,328)
Net utility plant |  |  |  |  | 72,680 |  |  |  |  | 72,680 | 62,624
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 2,485 | 2,258
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 2,882 | 1,212
Capital additions |  |  |  |  |  |  |  |  |  | 11,499 | 5,420
American States Utility Services [Member] | Contracted services: |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 120,582 | 114,491 | 107,208
Operating Income |  |  |  |  |  |  |  |  | 22,309 | 21,990 | 20,414
Interest expense, net |  |  |  |  |  |  |  |  | 496 | 734 | 327
Net utility plant | 22,246 |  |  |  | $ 20,963 |  |  |  | 22,246 | 20,963 | 15,218
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 3,402 | 2,956 | 2,030
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | 5,201 | 5,202 | 4,939
Capital additions |  |  |  |  |  |  |  |  | $ 4,675 | 9,088 | $ 10,207
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases |  |  |  |  |  |  |  |  | 50 years |  |
Bear Valley Electric Service, Inc. | Electric: |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | $ 37,024 |  |
Operating Income |  |  |  |  |  |  |  |  | 10,303 |  |
Interest expense, net |  |  |  |  |  |  |  |  | (584) |  |
Net utility plant | $ 89,308 |  |  |  |  |  |  |  | 89,308 |  |
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 2,479 |  |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | $ 2,689 |
Capital additions |  |  |  |  |  |  |  |  | $ 18,393 |  |

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