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REVENUES: Alternative Revenue Program and Other Revenues (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Alternative Revenue Program and Other Revenues [Line Items] |  |  |
Alternative revenue programs and other revenues | $ 123,282 | $ 83,066 | $ 72,757
Idaho Fixed Cost Adjustment [Member] |  |  |
Alternative Revenue Program and Other Revenues [Line Items] |  |  |
Alternative revenue programs and other revenues | 38,571 | 23,517 | 36,242
Derivative revenues |  |  |
Alternative Revenue Program and Other Revenues [Line Items] |  |  |
Alternative revenue programs and other revenues | $ 84,711 | $ 59,549 | $ 36,515

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- Definition [Line Items] for Alternative Revenue Program and Other Revenues [Table] + References No definition available. + Details
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Namespace Prefix: | ida_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of regulated other operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedOperatingRevenueOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=ida_IdahoFixedCostAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=ida_DerivativerevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |