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Earnings Per Share / Capital Stock- Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Feb. 27, 2024
Additional disclosure |  |  |  |
Exercise of stock options and other issuance of Common Shares | 25,196 | 18,371 | 25,956 |
Proceeds from Stock Options Exercised, Distributed to Subsidiaries | $ 0 | $ 0 | $ 0 |
Dividend Reinvestment Plan Common Stock Capital Shares Reserved for Future Issuance | 1,055,948 |  |  |
Common Shares authorized for issuance but unissued under 401(k) Plan | 387,300 |  |  |
Issuance of Common Shares from an at-the-market program, net of issuance costs | $ 88,661,000 |  |  |
Sale of Stock, Maximum Consideration On Transaction |  |  |  | $ 200,000,000
Payments of Stock Issuance Costs | 800,000 |  |  |
Payments for Commissions | $ 1,400,000 |  |  |
Weighted Average Number of Shares Outstanding (in shares) | 37,464,000 | 36,976,000 | 36,955,000 |
Sale of Stock, Agreement Term | 3 years |  |  |
Sale of Stock, Number of Shares Issued in Transaction | 1,145,219 |  |  |
Sale of Stock, Consideration Received on Transaction | $ 89,500,000 |  |  |
Sale of Stock, remaining available for sale | $ 109,100,000 |  |  |
AWR |  |  |  |
Additional disclosure |  |  |  |
Weighted Average Number of Shares Outstanding (in shares) | 37,464,000 | 36,976,000 | 36,955,000 |
GSWC |  |  |  |
Additional disclosure |  |  |  |
Exercise of stock options and other issuance of Common Shares | 2.7586 | 1 | 0 |
Issuance of Common Shares from an at-the-market program, net of issuance costs | $ 40,000,000.0 | $ 10,000,000 |  |

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