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v3.24.0.1

Common Stock - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Class Of Stock [Line Items] |  |  |
Preferred stock, shares outstanding | 0 | 0 |
Amount available for dividend distribution without affecting covenants | $ 295,600 |  |
Preferred stock, shares authorized | 10,000,000 |  |
Proceeds from issuance of common stock | $ 112,308 | $ 137,778 | $ 89,998
Common stock, shares authorized | 200,000,000 | 200,000,000 |
Common Stock [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Shares issued through sales agency agreements | 2,999,246 | 3,310,488 | 2,150,336
Issuance of common stock through sales agency agreements, net of issuance costs | $ 111,848 | $ 137,173 | $ 88,457
Avista Utilities [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Regulatory restrictions, maximum debt to equity | 35.00% |  |

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