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Earnings Per Share and Capital Stock 2 (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Capital stock |  |  |
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic |  | $ (131,000) | $ (175,000)
Additional disclosure |  |  |
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 |  |
Common Shares issued as a result of the exercise of stock options | 0 | 1,800 | 30,998
Cash proceeds from the exercise of stock options |  | $ 30,000 | $ 519,000
Exercise of stock options and other issuance of Common Shares | $ 0 | $ 30,000 | $ 519,000
2000 and 2008 Employee Plans |  |  |
Additional disclosure |  |  |
Exercise of stock options and other issuance of Common Shares | 47,182 | 42,489 | 88,772
AWR |  |  |
Additional disclosure |  |  |
Cash proceeds from the exercise of stock options | $ 0 | $ 30,000 | $ 519,000
GSWC |  |  |
Additional disclosure |  |  |
Short-term Debt, Terms | 24 |  |
Exercise of stock options and other issuance of Common Shares | $ 60,000,000 | $ 60,000,000 |
Common Stock [Member] |  |  |
Additional disclosure |  |  |
Exercise of stock options and other issuance of Common Shares | 47,000 | 42,000 | 89,000
Exercise of stock options and other issuance of Common Shares | $ 0 | $ 30,000 | $ 519,000
Common Stock [Member] | GSWC |  |  |
Additional disclosure |  |  |
Exercise of stock options and other issuance of Common Shares | 0 | 5 |
Exercise of stock options and other issuance of Common Shares | $ 60,000,000 |  |

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