XML 118 R91.htm IDEA: XBRL DOCUMENT
v3.25.4

COMMITMENTS: Commitments Level 4 (Details) | 12 Months Ended | 40 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) MWh | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Feb. 29, 2032 | Nov. 01, 2028 USD ($) | Dec. 31, 2027 MWh
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchased power |  | $ 392,462,000 | $ 425,082,000 | $ 501,531,000 |  |  |
Maximum | Subsequent Event | Energy and Capacity |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment, Period |  |  |  |  | 3 years |  |
Bridger Coal Company |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
IERCo guarantee of BCC reclamation obligation |  | 150,200,000 |  |  |  |  |
Idaho Power Company |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchased power |  | 392,462,000 | 425,082,000 | 501,531,000 |  |  |
IERCo guarantee of BCC reclamation obligation |  | $ 50,100,000 |  |  |  |  |
Idaho Power Company | PURPA and Non-PURPA Online |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Nameplate Capacity (in MW) | MWh |  | 1,724 |  |  |  |  |
Idaho Power Company | Subsequent Event | Energy and Capacity |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  |  |  |  |  | $ 14,400,000 |
Idaho Power Company | Joint-operating agreement payment [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current | [1] | $ 2,983,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years | [1] | 2,983,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years | [1] | 2,983,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years | [1] | 2,983,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years | [1] | 2,983,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter | [1] | 14,914,000 |  |  |  |  |
Idaho Power Company | Easements and Other payments [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current | [1] | 2,322,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years | [1] | 2,371,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years | [1] | 2,421,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years | [1] | 2,472,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years | [1] | 2,523,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter | [1] | 13,435,000 |  |  |  |  |
Idaho Power Company | Maintenance, service, and materials agreements |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current | [1],[2] | 479,388,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years | [1],[2] | 110,347,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years | [1],[2] | 312,155,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years | [1],[2] | 36,558,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years | [1],[2] | 8,327,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter | [1] | 41,237,000 |  |  |  |  |
Idaho Power Company | FERC and other industry-related fees |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current | [1] | 17,898,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years | [1] | 17,106,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years | [1] | 16,962,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years | [1] | 16,908,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years | [1] | 17,391,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter | [1] | 85,255,000 |  |  |  |  |
Idaho Power Company | Cogeneration, power production, battery storage, and transmission rights |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current |  | 350,046,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years |  | 383,878,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years |  | 427,829,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years |  | 428,270,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years |  | 425,584,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter |  | 3,710,029,000 |  |  |  |  |
Idaho Power Company | Fuel purchase commitments |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation Estimated Due Current |  | 191,035,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Two Years |  | 159,806,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Three Years |  | 96,773,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Four Years |  | 45,314,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Five Years |  | 46,063,000 |  |  |  |  |
Purchase Obligation Estimated Future Payments Due In Six Years And Thereafter |  | $ 498,929,000 |  |  |  |  |
Idaho Power Company | Cogeneration And Power Production Purchase Commitment Member | Minimum |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment, Period |  | 1 year |  |  |  |  |
Idaho Power Company | Cogeneration And Power Production Purchase Commitment Member | Maximum |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment, Period |  | 35 years |  |  |  |  |
Idaho Power Company | Long-Term Power Production Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchased power |  | $ 306,000,000 | $ 294,000,000 | $ 258,000,000 |  |  |
Idaho Power Company | Contracts to Acquire and Own Transmission and Generation |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  | 481,000,000 |  |  |  |  |
IDACORP [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment, Amount |  | 2,800,000 |  |  |  |  |
IDACORP [Member] | Affordable housing limited partnership and other real estate tax credit investments |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Long-term Purchase Commitment, Amount |  | 21,400,000 |  |  |  |  |
Forecast | Idaho Power Company | PURPA and Non-PURPA Online |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Nameplate Capacity (in MW) | MWh |  |  |  |  |  |  | 625
Contracts with no expiration [Member] | Idaho Power Company | Joint-operating agreement payment [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  | 30,000,000 |  |  |  |  |
Contracts with no expiration [Member] | Idaho Power Company | Easements and Other payments [Member] |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  | 1,000,000 |  |  |  |  |
Contracts with no expiration [Member] | Idaho Power Company | Maintenance, service, and materials agreements |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  | 16,000,000 |  |  |  |  |
Contracts with no expiration [Member] | Idaho Power Company | FERC and other industry-related fees |  |  |  |  |  |  |
Long-term Purchase Commitment |  |  |  |  |  |  |
Purchase Obligation |  | $ 170,000,000 |  |  |  |  |
[1] | Approximately $30 million, $1 million, $16 million, and $170 million of the commitments included in joint-operating agreement payments, easements and other payments, maintenance, service, and materials agreements, and FERC and other industry-related fees, respectively, have contracts that do not specify terms related to expiration. As these contracts are presumed to continue indefinitely, ten years of information, estimated based on current contract terms, has been included in the table for presentation purposes.
[2] | As of December 31, 2025, Idaho Power had a remaining $481 million commitment related to contracts to acquire and own transmission and generation resources with in-service dates in 2028 and 2030.

X
- Definition Nameplate Capacity of generating plant. + References No definition available. + Details
Name: | ida_NameplateCapacity
Namespace Prefix: | ida_
Data Type: | dtr-types:energyItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid after fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueAfterFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueInFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueInFourthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueInSecondYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | us-gaap_PurchaseObligationDueInThirdYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of operating expense for purchased power of regulated operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_UtilitiesOperatingExpensePurchasedPower
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ida_LongTermContractForPurchaseEnergyAndCapacityAxis=ida_EnergyAndCapacityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ida_BridgerCoalCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ida_IdahoPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ida_PURPAAndNonPURPAPowerProductionAxis=ida_PURPAAndNonPURPAOnlineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ida_JointoperatingagreementpaymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ida_EasementsandOtherpaymentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ida_MaintenanceServiceAndMaterialsAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ida_FercAndOtherIndustryRelatedFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ida_CogenerationPowerProductionBatteryStorageAndTransmissionRightsPurchaseCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=us-gaap_PublicUtilitiesInventoryFuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ida_CogenerationAndPowerProductionPurchaseCommitmentMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ida_LongTermPowerProductionIncludingPURPAPurchaseCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ida_ContractsToAcquireAndOwnTransmissionAndGenerationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ida_IDACORPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ida_AffordableHousingLimitedPartnershipAndOtherRealEstateTaxCreditInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ida_ContractTermAxis=ida_ContractswithnoexpirationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |