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COMMON STOCK: Common Stock Narrative (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 shares | Dec. 31, 2021 shares
Class of Stock [Line Items] |  |  |  |
Shares granted (in shares) | 75,295 |  | 73,131 | 76,147
Shares issued during the year | 53,345 |  | 45,413 | 54,594
Registered Public Offering, Initial Common Shares Offered | 2,801,724 |  |  |
Registered Public Offering, Price Per Share | $ / shares | $ 92.80 |  |  |
Registered Public Offering, Issuance Amount | $ | $ 260,000 |  |  |
Initial Forward Sale Price, Per Share | $ / shares | $ 90.016 |  |  |
Common Shares To Deliver To Settle Forward Sales Agreement, Gross | 3,221,982 |  |  |
Cash Received On Settlement Of Forward Sale Agreement | $ | $ 291,900 |  |  |
Cash To Deliver To Settle Forward Sales Agreement, Net | $ | $ 23,900 |  |  |
Common Shares To Deliver To Settle Forward Sales Agreement, Net | 200,000 |  |  |
Effect of Dilutive Securities (in shares) | 89,000 | [1] | 41,000 | 46,000
Registered Public Offering, Initial Common Shares Offered, Greenshoe | 420,258 |  |  |
Registered Public Offering, Initial Common Shares Offered, Total | 3,221,982 |  |  |
Registered Public Offering, Issuance Amount, Greenshoe | $ | $ 39,000 |  |  |
Incremental CommonShares Attributable To Share Based Payment Arrangements, Forward Sale Agreement | 34,131 |  |  |
IDACORP |  |  |  |
Class of Stock [Line Items] |  |  |  |
Maximum leverage ratio requirement | 0.65 |  |  |
Leverage ratio | 0.50 |  |  |
Amount dividends were limited to based on covenant restrictions | $ | $ 1,400,000 |  |  |
Idaho Power Company |  |  |  |
Class of Stock [Line Items] |  |  |  |
Leverage ratio | 0.51 |  |  |
Amount dividends were limited to based on covenant restrictions | $ | $ 1,200,000 |  |  |
Percentage of capital threshold below which Idaho Power will not pay dividends to IDACORP | 0.35 |  |  |
Equity Capital Ratio | 0.50 |  |  |
Shares of preferred stock outstanding | 0 |  |  |
[1] | The effect of dilutive securities amount includes 34,131 incremental shares related to FSAs as of December 31, 2023. See Note 6 - "Common Stock" for additional information concerning IDACORP's FSAs.

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