Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Amortization of prior service cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Maximum Maximum [Member] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Accumulated provision for depreciation Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Title of 12(b) Security Title of 12(b) Security Carrying Amount Reported Value Measurement [Member] Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Derivative Liability, Fair Value, Gross Asset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Common stock Common Stock, Value, Issued Interest Expense, Operating and Nonoperating Interest Expense, Operating and Nonoperating Tax withholdings on net settlements of share-based awards Tax withholdings on net settlements of share-based awards Payment, Tax Withholding, Share-Based Payment Arrangement Accrued compensation Employee-related Liabilities, Current Benefit Plans Retirement Benefits [Text Block] IERCo guarantee of BCC reclamation obligation Guarantor Obligations, Maximum Exposure, Undiscounted Forward Sale Agreements Settlement Date 5/28/26 1 (2025 Series) Forward Sale Agreements Settlement Date 7/13/26 (2025 Series) [Member] Forward Sale Agreements Settlement Date 7/13/26 (2025 Series) Restatement Determination Date Restatement Determination Date Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Availability future use [Axis] Availability future use [Axis] Availability future use Excess deferred income tax reversal Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Derivative Instrument [Axis] Derivative Instrument [Axis] Long-Term Contract for Purchase of Wind Generation Long-Term Contract for Purchase of Wind Generation [Member] Long-Term Contract for Purchase of Wind Generation Segment Information [Abstract] Segment Information [Abstract] Segment Information [Abstract] Other Comprehensive Income (Loss) before Reclassifications, Tax Other Comprehensive Income (Loss) before Reclassifications, Tax Balance at beginning of period Balance at end of period Accounts Receivable, Allowance for Credit Loss Regulatory liabilities Regulatory Liability, Noncurrent Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Current Liabilities: Liabilities, Current [Abstract] Additions to the allowance Accounts Receivable, Credit Loss Expense (Reversal) Discount on issuance of long-term debt Premium (discount) on issuance of long-term debt Premium (discount) on issuance of long-term debt Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Payments on finance lease liabilities Finance Lease, Principal Payments Allowance for equity funds used during construction Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Disposal Group Classification [Axis] Disposal Group Classification [Axis] Accumulated provision for depreciation Disposal Group, Including Discontinued Operation, Accumulated Provision for Depreciation Disposal Group, Including Discontinued Operation, Accumulated Provision for Depreciation Proceeds from Contributed Capital Proceeds from Contributed Capital Dividend Distribution Restriction Threshold Dividend Distribution Restriction Threshold The threshold below which the entity will not pay any dividends to the parent company that would reduce the entity's common equity capital, without obtaining regulatory approval. 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Principal amount of debt securities and first mortgage bonds authorized by the IPUC, OPUC, and WPSC. Principal amount of debt securities and first mortgage bonds authorized by the IPUC, OPUC, and WPSC. 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diluted (in shares) Weighted-average common shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Pension and other postretirement benefits Liability, Defined Benefit Plan, Noncurrent Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Dividends Dividends Other property, net of accumulated depreciation Property, Plant, and Equipment, Other, before Accumulated Depreciation Deferred income taxes and investment tax credits Deferred Income Taxes and Tax Credits Property, plant, and equipment - net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization ADITC ADITC [Member] ADITC DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Regulatory Asset [Axis] Regulatory Asset [Axis] Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Requested Year [Axis] Requested Year [Axis] Requested Year Derivative Liability, Fair Value, Gross Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Total other assets Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment Defined Benefit Plan, Contributions by Employer Defined Benefit Plan, Plan Assets, Contributions by Employer Hells Canyon Complex Hells Canyon Complex [Member] Relicensing Costs Hells Canyon Complex Statutory Accounting Practices, Jurisdiction [Domain] Statutory Accounting Practice, Jurisdiction [Domain] Revenue from Contract with Customer [Abstract] Other Other Receivables Derivative Instrument Detail [Abstract] Derivative Instrument Detail [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Utility plant in service - 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Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block] Accrued unbilled revenues Unbilled Receivables, Current Assets Held for Sale Disclosure [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Public Utilities, Requested Rate Increase (Decrease), Amount Public Utilities, Requested Rate Increase (Decrease), Amount Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Number of plans Defined Benefit Plans, Number Of Plans Defined Benefit Plans, Number Of Plans Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] General Discussion of Derivative Instruments and Hedging Activities [Abstract] General Discussion of Derivative Instruments and Hedging Activities [Abstract] Issuance of Common Stock Proceeds from Issuance of Common Stock Common Stock, Shares Authorized Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Medium Term Notes, Series O Medium Term Notes, Series O [Member] Medium Term Notes, Series O Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Other income, net Other income, net Other income, net Segment Reporting Segment Reporting [Line Items] Changes in Idaho Power Retained Earnings Table ChangesinIdahoPowerRetainedEarningsTable [Table Text Block] ChangesinIdahoPowerRetainedEarnings Document Quarterly Report Document Quarterly Report Long-Term Purchase Commitment, Period Long-Term Purchase Commitment, Period Assets Held for Sale [Table] Disposal Groups, Including Discontinued Operations [Table] Other revenues Other revenues [Member] Other revenues [Member] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Wildfire Mitigation Plan Deferral Wildfire Mitigation Plan Deferral [Member] Wildfire Mitigation Plan Deferral ATM Forward Sale Agreements Maturity 3/31/26 1 ATM Forward Sale Agreements Settlement Date 3/31/26 1 [Member] ATM Forward Sale Agreements Settlement Date 3/31/26 1 Common Stock Including Additional Paid in Capital Common Stock Including Additional Paid in Capital [Member] Cash Received On Settlement Of Forward Sale Agreement Cash Received On Settlement Of Forward Sale Agreement Cash Received On Settlement Of Forward Sale Agreement Scenario [Axis] Scenario [Axis] Retirement of long-term debt Repayments of Long-Term Debt Disposal Group Classification [Domain] Disposal Group Classification [Domain] Alternative revenue programs and other revenues Regulated Operating Revenue (Expense), Other, Net Regulated Operating Revenue (Expense), Other, Net Employee Savings Plan Employee Savings Plan [Member] Employee Savings Plan Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Loss Contingency [Abstract] Loss Contingency [Abstract] At-the-Market Offering Program (2026 Series) At-the-Market Offering Program (2026 Series) [Member] At-the-Market Offering Program (2026 Series) Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount At-the-Market Offering Program, Commission and Fees Amount At-the-Market Offering Program, Commission and Fees Amount At-the-Market Offering Program, Commission and Fees Amount Adoption Date Trading Arrangement Adoption Date Consideration Disposal Group, Including Discontinued Operation, Consideration Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Common stock dividends Dividends, Common Stock, Cash Total IDACORP, Inc. shareholders’ equity Total IDACORP, Inc. shareholders’ equity Balance at beginning of period Balance at end of period Equity, Attributable to Parent Total non-operating expense, net Nonoperating Income (Expense) Equity Securities, FV-NI Equity Securities, FV-NI, Current ATM Forward Sale Agreements Maturity 3/31/26 ATM Forward Sale Agreements Settlement Date 3/31/26 [Member] ATM Forward Sale Agreements Settlement Date 3/31/26 Regulatory Agency [Axis] Regulatory Agency [Axis] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] At-the-Market Offering Program, Initial Common Shares Offered At-the-Market Offering Program, Initial Common Shares Offered At-the-Market Offering Program, Initial Common Shares Offered Insider Trading Policies and Procedures [Line Items] Held-to-maturity securities Debt Securities, Held-to-Maturity, Fair Value debt instrument, net proceeds plus accrued interest debt instrument, net proceeds plus accrued interest debt instrument, net proceeds plus accrued interest Fuel stock (at average cost) Energy Related Inventory, Other Fossil Fuel Regulatory Agency [Domain] Regulatory Agency [Domain] Accounts Receivable, Allowance for Credit Loss, Current Accounts Receivable, Allowance for Credit Loss, Current Other Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Proceeds from Income Tax Refunds Proceeds from Income Tax Refunds Performance Shares Performance Shares [Member] Idaho Power Cost Adjustment Idaho Power Cost Adjustment [Member] Idaho Power Cost Adjustment Capital stock issuance costs Capital stock issuance costs Accumulated direct costs (e.g. legal and accounting fees) associated with issuing stock that was deducted from additional paid in capital. Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Current regulatory assets Regulatory Asset, Current Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Utility plant held for future use Plant Held for Future Use Amount Construction work in progress Construction in Progress, Gross Number of Operating Segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Premium on capital stock Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Schedule of Guarantor Obligations [Table] Guarantor Obligation [Table] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Income Tax Income Tax, Policy [Policy Text Block] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Other Stockholders' Equity, Other Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Operating Expenses [Abstract] Operating Expenses [Abstract] Electric utility operating revenues [Table Text Block] Electric utility operating revenues [Table Text Block] [Table Text Block] for Electric utility operating revenues [Table] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] At-the-Market Offering Programs (2024 & 2026 Series) At-the-Market Offering Programs (2024 & 2026 Series) [Member] At-the-Market Offering Programs (2024 & 2026 Series) Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of ATM Forward Contracts Indexed to Issuer's Equity, Settled Schedule of ATM Forward Contracts Indexed to Issuer's Equity, Settled [Table Text Block] Schedule of ATM Forward Contracts Indexed to Issuer's Equity, Settled Allowance for borrowed funds used during construction Interest Costs Capitalized Adjustment Alternative revenue programs and other revenues [Table Text Block] Alternative revenue programs and other revenues [Table Text Block] Alternative revenue programs and other revenues [Table Text Block] City Area Code City Area Code Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] Income tax return adjustments Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount All Individuals All Individuals [Member] Long-term debt Debt Instrument, Fair Value Disclosure Jurisdiction [Axis] Statutory Accounting Practice, Jurisdiction [Axis] Net Periodic Benefit cost recognized in other expense, net otherexpensedefinedbenefitplanbenefitcost Amount of net periodic benefit cost excluding service cost for defined benefit plans that is recorded as "Other Expense, Net". Allowance for uncollectible accounts as a percentage of customer receivables Allowance for uncollectible accounts as a percentage of customer receivables Allowance for uncollectible accounts as a percentage of customer receivables Derivatives, Reporting of Derivative Activity Derivatives, Reporting of Derivative Activity [Policy Text Block] Name Forgone Recovery, Individual Name Commitments and Contingencies, Policy Commitments and Contingencies, Policy [Policy Text Block] Regulatory Liability [Domain] Regulatory Liability [Domain] Other operating expenses, net Utilities Operating Expense, Other, Net Utilities Operating Expense, Other, Net Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Forward Sale Agreements (2025 Series) Forward Sale Agreements (2025 Series) [Member] Forward Sale Agreements (2025 Series) Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Entity [Domain] Entity [Domain] Rate Cases [Axis] Rate Cases [Axis] The list of rate cases itemized in a delineation of regulatory matters. Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Operating Segments Operating Segments [Member] Dividend Reinvestment and Stock Purchase Plan Dividend Reinvestment and Stock Purchase Plan [Member] Dividend Reinvestment and Stock Purchase Plan 2025 Rate Case 2025 Rate Case [Member] 2025 Rate Case Subsidiary of Common Parent Subsidiary of Common Parent [Member] Long-Term Purchase Commitment, Category of Item Purchased Long-Term Purchase Commitment, Category of Item Purchased [Domain] Energy Energy [Domain] Wholesale energy sales Wholesale energy sales [Member] Wholesale energy sales [Member] Directors Directors [Member] Directors Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Nature of Business Nature of Operations [Text Block] PEO PEO [Member] Registered Public Offering, Initial Common Shares Offered Registered Public Offering, Initial Common Shares Offered Registered Public Offering, Initial Common Shares Offered IPUC Authorized recovered pension cost Defined Benefit Plan Regulated IPUC Authorized recovered pension cost IPUC Authorized recovered pension cost deferred and allowed annual amortized amount. This is impacted by timing of cash contributions to plan. Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements Measurement Basis [Axis] Measurement Basis [Axis] Derivative Asset, Fair Value, Gross Liability Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Other Other Liabilities, Noncurrent Regulatory jurisdiction [Domain] Regulatory jurisdiction [Domain] Regulatory jurisdiction [Domain] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Share Recipient [Domain] Share Recipient [Domain] Share Recipient [Domain] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Taxes accrued Taxes Payable, Current Schedule of Forward Contracts Indexed to Issuer's Equity, Settled Schedule of Forward Contracts Indexed to Issuer's Equity, Settled [Table Text Block] Schedule of Forward Contracts Indexed to Issuer's Equity, Settled Total operating expenses Operating Expenses Allowance for equity funds used during construction Public Utilities, Allowance for Funds Used During Construction, Additions Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Earnings attributable to IDACORP, Inc. - diluted (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Transmission Service Agreement Transmission services (wheeling) [Member] Transmission services (wheeling) [Member] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME Changes in Accumulated Other Comprehensive Income [Text Block] The entire disclosure for an entity's changes in accumulated other comprehensive income for the periods presented. PURPA and Non-PURPA Power Production PURPA and Non-PURPA Power Production [Member] PURPA and Non-PURPA Power Production Tax withholdings on net settlements of share-based awards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Natural Gas (MMBTU) Fuel [Member] Power cost adjustment Power cost adjustment expense (deferral) An adjustment to net power supply costs (Purchased Power and Fuel less Off-system sales) listed to defer/accrue them for amounts that will be collected from/returned to customers in the future, and to recognize previously deferred/accrued net power supply costs to match with amounts now collected from/returned to customers. Other operations and maintenance Utilities Operating Expense, Maintenance and Operations Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Current regulatory assets Disposal Group, Including Discontinued Operation, Current Regulatory Assets Disposal Group, Including Discontinued Operation, Current Regulatory Assets Ratio of total Capital to total capital and long-term debt Ratio of total Capital to total capital and long-term debt Ratio of total Capital to total capital and long-term debt Write-offs, net of recoveries Accounts Receivable, Allowance for Credit Loss, Writeoff Schedule of Forward Contracts Indexed to Issuer's Equity Schedule of Forward Contracts Indexed to Issuer's Equity [Table Text Block] Retained Earnings Roll Forward [Roll Forward] Retained Earnings Roll Forward [Roll Forward] Retained Earnings Roll Forward Long-Term Purchase Commitment Long-Term Purchase Commitment [Line Items] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Additional Collateral, Aggregate Fair Value Additional Collateral, Aggregate Fair Value Other Interest and Dividend Income Other Interest and Dividend Income Registered Public Offering, Executed Amount, Greenshoe Registered Public Offering, Executed Amount, Greenshoe Registered Public Offering, Executed Amount, Greenshoe Interest cost Defined Benefit Plan, Interest Cost Bonds issued at reoffer debt [Domain] Bonds issued at reoffer debt [Domain] Bonds issued at reoffer debt [Domain] ATM Forward Sale Agreements Maturity 5/28/27 ATM Forward Sale Agreements Maturity 5/28/27 [Member] ATM Forward Sale Agreements Maturity 5/28/27 Financial Instruments [Domain] Financial Instruments [Domain] Total assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Derivative Assets Derivative Asset Idaho Power Company Idaho Power Company [Member] Idaho Power Company [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Estimated Fair Value Estimate of Fair Value Measurement [Member] REVENUES: Revenue from Contract with Customer [Text Block] Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Prepayments Prepaid Expense, Current Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Derivative revenues Derivative revenues netting [Member] Derivative revenues [Member] Other Payment for (Proceeds from) Other Investing Activity Shareholders' equity Shareholders' equity [Line Items] Shareholders' equity [Line Items] Segment Reporting [Table] Segment Reporting [Table] Derivative, Number of Instruments Held Derivative, Number of Instruments Held Other Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Long-Term Contract for Purchase of Gas Transportation Capacity Long-Term Contract for Purchase of Gas Transportation Capacity [Member] Long-Term Contract for Purchase of Gas Transportation Capacity ATM Forward Sale Agreements Maturity 2/29/2028 1 ATM Forward Sale Agreements Maturity 2/29/2028 1 [Member] ATM Forward Sale Agreements Maturity 2/29/2028 1 Operating Income Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative Derivative [Line Items] Financial Statements Comparability of Prior Year Financial Data, Policy [Policy Text Block] Regulatory assets Disposal Group, Including Discontinued Operation, Long-Term Regulatory Assets Disposal Group, Including Discontinued Operation, Long-Term Regulatory Assets Minimum authorized return on equity Authorized Return on Equity in Rate Case, Minimum The minimum authorized return on equity, whether requested or approved, in the rate case. Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Common stock dividends, per share (in dollar per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost CHANGES IN IDAHO POWER RETAINED EARNINGS ChangesinIdahoPowerRetainedEarnings [Text Block] ChangesinIdahoPowerRetainedEarnings [Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common Stock, Shares, Issued Common Stock, Shares, Issued Measure: Measure [Axis] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Commercial Retail Revenue Commercial Retail Revenue [Member] Commercial Retail Revenue [Member] First Mortgage Bonds 4.85 Series O Due 2036 [Domain] First Mortgage Bonds 4.85 Series O Due 2036 [Domain] First Mortgage Bonds 4.85 Series O Due 2036 Principal amount of debt securities in Selling Agreement Principal amount of debt securities in Selling Agreement [Member] Principal amount of debt securities in Selling Agreement [Member] Equity Components [Axis] Equity Components [Axis] Accounts receivable and unbilled receivables Accounts receivable and unbilled receivables Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Income Tax Paid, after Refund Received Income Tax Paid, after Refund Received Changes in regulatory assets and liabilities Increase (Decrease) in Regulatory Assets and Liabilities Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Materials and supplies (at average cost) Other Inventory, Supplies, Gross Income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred Income Tax Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Capital contribution from parent Proceeds from Contributions from Parent Entity Small Business Entity Small Business Utility plant in service Public Utilities, Property, Plant and Equipment, Plant in Service Comprehensive Income Attributable to IDACORP, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Assets Held for Sale Disclosure Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Unfunded pension liability adjustment, net of tax of $74, $57, $222, and $302 respectively Unfunded pension liability adjustment (net of tax) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Other Other Liabilities, Current Other Other Assets, Noncurrent IPUC authorized AFUDC Collection HCC Relicensing - Gross IPUC authorized AFUDC Collection HCC Relicensing - Gross [Member] IPUC authorized AFUDC Collection HCC Relicensing - Gross Document Type Document Type Debt Instrument, Repurchased Face Amount Debt Instrument, Repurchased Face Amount Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Other Liabilities [Abstract] Other Liabilities [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Short Short [Member] Forward Sale Price, Per Share, Settled Forward Sale Price, Per Share, Settled Forward Sale Price, Per Share, Settled Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Long-Term Contract for Purchase of Hydro Power Long-Term Contract for Purchase of Hydro Power [Member] Long-Term Contract for Purchase of Hydro Power Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Maximum leverage ratio requirement Maximum leverage ratio requirement Maximum aggregate indebtedness divided by net capital, as allowed by credit facility covenant. Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Income Tax Expense [Table] Income Tax Expense [Table] An analysis of income tax expense for the period. Issuance of long-term debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Postretirement Benefits Plan Other Postretirement Benefits Plan [Member] Construction work in progress Disposal Group, Including Discontinued Operation, Construction Work in Progress Disposal Group, Including Discontinued Operation, Construction Work in Progress Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Industrial Retail Revenue Industrial Retail Revenue [Member] Industrial Retail Revenue [Member] Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Other interest Interest Expense, Other Commitments and Contingencies Commitments and Contingencies Dividend Distribution Restriction Amount Dividend Distribution Restriction Amount The maximum amount of dividends that can by paid out by the entity, as allowed by credit facility covenant. Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Earnings of unconsolidated equity-method investments Earnings of unconsolidated equity-method investments Income (Loss) from Equity Method Investments Accounts and wages payable Increase (Decrease) in Accounts Payable and Accrued Liabilities Idaho fixed cost adjustment mechanism Idaho Fixed Cost Adjustment Netting [Member] Annual Idaho Fixed Cost Adjustment Filing [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Long-Term Purchase Commitments and Guarantor Long-Term Purchase Commitment [Table] Forward Sale Agreement, Policy Forward Sale Agreement, Policy [Policy Text Block] Forward Sale Agreement, Policy Operating Expenses: Operating Costs and Expenses [Abstract] Accounts Payable, Other Accounts Payable, Other Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Derivatives in a net liability position Derivative, Net Liability Position, Aggregate Fair Value FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Termination Of Contracts To Acquire And Own Wind Facility And Wind Power [Axis] Termination Of Contracts To Acquire And Own Wind Facility And Wind Power [Axis] Termination Of Contracts To Acquire And Own Wind Facility And Wind Power Materials, supplies, and fuel stock Increase (Decrease) in Materials and Supplies Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Availability future use [Domain] Availability future use [Domain] Availability future use [Domain] PEO Name PEO Name Summary of Derivative Instruments [Abstract] Summary of Derivative Instruments [Abstract] Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] Residential Retail Revenue Residential Retail Revenue [Member] Residential Retail Revenue Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Indenture, Limit of first mortgate bonds at any one time outstanding Indenture, Limit of first mortgate bonds at any one time outstanding Maximum amount of first mortgage bonds that could be issued under Idaho Power's Indenture of Mortgage and Deed of Trust, as of the balance sheet date. Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Net Periodic Benefit cost recognize in Other operations and maintenance NetServiceCostDefinedBenefitPlan Amount of service cost for defined benefit plan that is recognized in "Other operations and maintenance". Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Legal Entity [Axis] Legal Entity [Axis] Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital Interest on long-term debt and finance leases Interest Expense, Debt Rate Case Matter [Axis] Rate Case Matter [Axis] Rate Case Matter [Axis] Revenue Recognition Revenue [Policy Text Block] Cash and cash equivalents at beginning of the period Cash and cash equivalents at end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] PURPA and Non-PURPA Power Production [Domain] PURPA and Non-PURPA Power Production [Domain] PURPA and Non-PURPA Power Production [Domain] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Wildfire mitigation plan costs Wildfire mitigation plan costs [Member] Wildfire mitigation plan costs Total Comprehensive Income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Forward Sale Price, Price Per Share Forward Sale Price, Per Share Forward Sale Price, Per Share Debt Instrument [Axis] Debt Instrument [Axis] At-the-Market Offering Program, Maximum Value Of Shares To Be Issued, Gross Sales Price At-the-Market Offering Program, Maximum Value Of Shares To Be Issued, Gross Sales Price At-the-Market Offering Program, Maximum Value Of Shares To Be Issued, Gross Sales Price Long Long [Member] Public Utilities, Regulatory Proceeding [Axis] Public Utilities, Regulatory Proceeding [Axis] Disposal Group Name [Axis] Disposal Group Name [Axis] Customer [Domain] Customer [Domain] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Earnings attributable to IDACORP, Inc. - basic (in dollars per share) Earnings Per Share, Basic Annual amortization cap Public Utilities, Annual Amortization Cap, Value Public Utilities, Annual Amortization Cap, Value Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Advances from customers Contract with Customer, Liability, Current Total current assets Assets, Current Current regulatory liabilities Disposal Group, Including Discontinued Operation, Current Regulatory Liabilities Disposal Group, Including Discontinued Operation, Current Regulatory Liabilities Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Long-Term Debt Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Initial Forward Sale Price, Per Share Initial Forward Sale Price, Per Share Initial Forward Sale Price, Per Share Common Shares To Deliver To Settle Forward Sales Agreement, Net Common Shares To Deliver To Settle Forward Sales Agreement, Net Common Shares To Deliver To Settle Forward Sales Agreement, Net Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Customer Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Balance at beginning of period Balance at end of period Retained Earnings (Accumulated Deficit) Forward contracts Commodity Contract [Member] Product and Service [Axis] Product and Service [Axis] Segment Reporting, Measurement Disclosures [Abstract] Segment Reporting, Measurement Disclosures [Abstract] Retail revenues Retail revenues [Member] Retail revenues [Member] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Annual fixed cost adjustment mechanism deferral Annual fixed cost adjustment mechanism deferral Annual fixed cost adjustment mechanism deferral amount, whether approved or requested. Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Pension Plan Pension Plan [Member] Common Stock Common Stock [Member] Forward Sale Agreements Settlement Date 5/28/26 (2025 Series) Forward Sale Agreements Settlement Date 5/28/26 (2025 Series) [Member] Forward Sale Agreements Settlement Date 5/28/26 (2025 Series) Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fuel expense Utilities Operating Expense, Fuel Used Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Assets Held for Sale [Table] Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations [Member] Changes in Retained Earnings [Line Items] Changes in Retained Earnings [Line Items] Changes in Retained Earnings [Line Items] Proceeds from Sale of Other Productive Assets Proceeds from Sale of Other Productive Assets Registered Public Offering, Initial Common Shares Offered, Total Registered Public Offering, Initial Common Shares Offered, Total Registered Public Offering, Initial Common Shares Offered, Total Derivative Contract [Domain] Derivative Contract [Domain] Common Shares Delivered To Settle Forward Sales Agreement, Gross Common Shares Delivered To Settle Forward Sales Agreement, Gross Common Shares Delivered To Settle Forward Sales Agreement, Gross Share Recipient [Axis] Share Recipient [Axis] Share Recipient Equity Awards Adjustments Equity Awards Adjustments [Member] Rate Case Matter [Domain] Rate Case Matter [Domain] [Domain] for Rate Case Matter [Axis] Total Liabilities and Equity Regulatory Asset [Domain] Regulatory Asset [Domain] Indenture, Unused Borrowing Capacity, Amount Indenture, Unused Borrowing Capacity, Amount Amount of additional first mortgage bonds that could be issued under Idaho Power's Indenture of Mortgage and Deed of Trust, as of the balance sheet date. Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Electricity (MWh) Electricity [Member] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Senior Management Security Plan Supplemental Employee Retirement Plan [Member] Company-owned life insurance Life Insurance, Corporate or Bank Owned, Amount Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] ATM Forward Sale Agreements Maturity 12/3/27 ATM Forward Sale Agreements Maturity 12/3/27 [Member] ATM Forward Sale Agreements Maturity 12/3/27 Related Party [Domain] Related and Nonrelated Parties [Domain] No Trading Symbol Flag No Trading Symbol Flag Changes in Idaho Power Retained Earnings [Abstract] Changes in Idaho Power Retained Earnings [Abstract] Changes in Idaho Power Retained Earnings [Abstract] Tabular List, Table Tabular List [Table Text Block] Other assets and liabilities Increase (Decrease) in Other Noncurrent Liabilities Other income, net Other Nonoperating Income (Expense) LONG-TERM DEBT Long-Term Debt [Text Block] Total reclassification, before tax - pension and postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Income taxes receivable Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Other Assets: Assets, Noncurrent [Abstract] Property, Plant and Equipment: Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Idaho Power Company Consolidated Statements of Cash Flows [Abstract] Idaho Power Company Consolidated Statements of Cash Flows [Abstract] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Regulatory liabilities Regulatory Liability PURPA and Non-PURPA Power Production [Axis] PURPA and Non-PURPA Power Production [Axis] PURPA and Non-PURPA Power Production Adjustment to Compensation: Adjustment to Compensation [Axis] ATM Forward Sale Agreements Maturity 5/28/27 1 ATM Forward Sale Agreements Maturity 5/28/27 1 [Member] ATM Forward Sale Agreements Maturity 5/28/27 1 Reclassifications Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax ATM Forward Sale Agreements Maturity 3/31/27 2 ATM Forward Sale Agreements Maturity 3/31/27 2 [Member] ATM Forward Sale Agreements Maturity 3/31/27 2 At-the-Market Offering Program (2024 Series) At-the-Market Offering Program (2024 Series) [Member] At-the-Market Offering Program (2024 Series) Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest (net of amount capitalized) Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Contributions to pension and postretirement benefit plans Payment for Pension and Other Postretirement Benefits Other Other General Expense Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Assets, Fair Value Disclosure Assets, Fair Value Disclosure Discontinued Operations and Disposal Groups [Abstract] Name Measure Name Irrigation Retail Revenue Irrigation Retail Revenue [Member] Irrigation Retail Revenue [Member] Long-Term Power for Purchase of Solar Power and Battery Storage Capacity Long-Term Power for Purchase of Solar Power and Battery Storage Capacity [Member] Long-Term Power for Purchase of Solar Power and Battery Storage Capacity Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other Operating Segment Other Operating Segment [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other non-cash adjustments to net income, net Other non-cash adjustments to net income, net Other Noncash Income (Expense) COMMITMENTS Commitments Disclosure [Text Block] Reclassification out of Accumulated Other Comprehensive Income Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract] Debt Instrument [Line Items] Debt Instrument [Line Items] Prepayments Increase (Decrease) in Other Current Assets Entity Information, Former Legal or Registered Name Entity Information, Former Legal or Registered Name Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Retirement Benefits, Description [Abstract] Retirement Benefits, Description [Abstract] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category 2023 Settlement Stipulation 2023 Settlement Stipulation [Member] 2023 Settlement Stipulation Proceeds from Sale of Intangible Assets Proceeds from Sale of Intangible Assets Oregon Power Cost Adjustment Wildfire Oregon Power Cost Adjustment Wildfire [Member] Oregon Power Cost Adjustment Wildfire Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Position Position [Domain] Derivative, by Nature Energy [Axis] Company Selected Measure Amount Company Selected Measure Amount Distributions from equity-method investments Proceeds from Equity Method Investment, Distribution Depreciation and amortization Depreciation, Depletion and Amortization Investment Tax Credits, Remains Available Investment Tax Credits, Remains Available Investment Tax Credits, Remains Available Public Utilities Public Utilities [Member] Net Income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Right-of-use asset obtained in exchange for finance lease liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Current Assets: Assets, Current [Abstract] Derivative Liabilities Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Amortization of net loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Entity Address, Address Line One Entity Address, Address Line One Income Tax Expense (Benefit) Income Tax Expense Income Tax Expense (Benefit) Registered Public Offering, Executed Amount Registered Public Offering, Executed Amount Registered Public Offering, Executed Amount Regulatory jurisdiction [Axis] Regulatory jurisdiction [Axis] Regulatory jurisdiction [Axis] Purchase Obligation Purchase Obligation Award Timing Method Award Timing Method [Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Amortization of net loss Defined Benefit Plan, Amortization of Gain (Loss) New and Recently Adopted Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Disclosure Text Block Supplement [Abstract] Disclosure Text Block Supplement [Abstract] Net Income Attributable to IDACORP, Inc. Net Income Attributable to IDACORP, Inc. Net Income Attributable to IDACORP, Inc. Net Income (Loss) Attributable to Parent Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Debt instrument interest rate limit Debt instrument interest rate limit Debt security and first mortgage bond maximum interest rate limit imposed by the OPUC. IDAHO IDAHO Restatement Determination Date: Restatement Determination Date [Axis] Current regulatory liabilities Regulatory Liability, Current Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Total other liabilities Liabilities, Other than Long-Term Debt, Noncurrent ATM Forward Sale Agreements Maturity 3/31/27 1 [Member] ATM Forward Sale Agreements Maturity 3/31/27 1 [Member] ATM Forward Sale Agreements Maturity 3/31/27 1 Receivables: Receivables, Net, Current [Abstract] Total operating revenues Total operating revenues Regulated and Unregulated Operating Revenue Cash To Be Received On Settlement Of Forward Sale Agreement Cash To Be Received On Settlement Of Forward Sale Agreement Cash To Be Received On Settlement Of Forward Sale Agreement Regulatory Matters Disclosures [Abstract] Regulatory Matters Disclosures [Abstract] Regulatory Matters [Abstract] Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Income tax expense before additional ADITC amortization Income tax expense before additional ADITC amortization Income tax expense before additional ADITC amortization Operating Revenues: Revenues [Abstract] Collateral Already Posted, Aggregate Fair Value Collateral Already Posted, Aggregate Fair Value Category of Item Purchased [Axis] Category of Item Purchased [Axis] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] UNITED STATES