v3.26.1
COMMON STOCK: Level 4 (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
shares
Idaho Power Company    
Shareholders' equity    
Proceeds from Contributed Capital | $ $ 90,000  
Ratio of Indebtedness to Net Capital 0.53  
Dividend Distribution Restriction Amount | $ $ 1,300,000  
Dividend Distribution Restriction Threshold 0.35  
Ratio of total Capital to total capital and long-term debt 0.47  
Preferred Stock, Shares Outstanding 0  
IDACORP    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 549,104  
Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements 1,171,000 0
Maximum leverage ratio requirement 0.65  
Ratio of Indebtedness to Net Capital 0.54  
Dividend Distribution Restriction Amount | $ $ 1,400,000  
IDACORP | Performance Shares    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 54,714  
Restricted Stock Unit Awards to Employees 71,855  
IDACORP | Directors    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 31,837  
IDACORP | Dividend Reinvestment and Stock Purchase Plan    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 10,297  
IDACORP | At-the-Market Offering Program    
Shareholders' equity    
At-the-Market Offering Program, Maximum Value Of Shares To Be Issued | $ $ 300,000  
Common Stock Capital Shares Reserved For Future Issuance, Remaining | $ $ 0  
Registered Public Offering, Initial Common Shares Offered 1,101,391  
Registered Public Offering, Executed Amount | $ $ 155,500  
Registered Public Offering, Commission and Fees Amount | $ $ 1,900  
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 1,101,391  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 153,765  
Forward Sale Price, Price Per Share | $ / shares $ 139.61  
Cash To Deliver To Settle Forward Sales Agreement, Net | $ $ 1,300  
Common Shares To Deliver To Settle Forward Sales Agreement, Net 9,273  
Common Shares Delivered To Settle Forward Sales Agreement, Gross 452,256  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 51,729  
Forward Sale Price, Per Share, Settled | $ / shares $ 114.38  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/27    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 530,000  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 74,040  
Forward Sale Price, Price Per Share | $ / shares $ 139.70  
IDACORP | ATM Forward Sale Agreements Maturity 03/31/27 1    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 245,830  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 34,730  
Forward Sale Price, Price Per Share | $ / shares $ 141.28  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/27 2    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 325,561  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 44,995  
Forward Sale Price, Price Per Share | $ / shares $ 138.21  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/26    
Shareholders' equity    
Common Shares Delivered To Settle Forward Sales Agreement, Gross 198,086  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 22,777  
Forward Sale Price, Per Share, Settled | $ / shares $ 114.99  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/26 1    
Shareholders' equity    
Common Shares Delivered To Settle Forward Sales Agreement, Gross 254,170  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 28,952  
Forward Sale Price, Per Share, Settled | $ / shares $ 113.91  
IDACORP | Forward Sale Agreements (2025 Series)    
Shareholders' equity    
Registered Public Offering, Initial Common Shares Offered 4,504,505  
Registered Public Offering, Executed Amount | $ $ 500,000  
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 5,180,180  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 560,300  
Cash To Deliver To Settle Forward Sales Agreement, Net | $ $ 167,900  
Common Shares To Deliver To Settle Forward Sales Agreement, Net 1,194,767  
Registered Public Offering, Price Per Share | $ / shares $ 111.00  
Registered Public Offering, Initial Common Shares Offered, Greenshoe 675,675  
Registered Public Offering, Executed Amount, Greenshoe | $ $ 75,000  
Registered Public Offering, Initial Common Shares Offered, Total 5,180,180  
Initial Forward Sale Price, Per Share | $ / shares $ 107.67  
[1] Settlement of the FSAs is reflected in IDACORP’s equity.