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v3.10.0.1

Income Taxes: (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Golden State Water Company |  |  |  |
Effective income tax rate |  |  |  |
ETRs (as a percent) | 23.20% | 38.40% | 22.50% | 38.60%
Parent |  |  |  |
Effective income tax rate |  |  |  |
ETRs (as a percent) | 23.20% | 37.30% | 21.70% | 37.30%

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