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Schedule II - Consolidated Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2025
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure | IDACORP, INC. AND IDAHO POWER COMPANY SCHEDULE II - CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2025, 2024, and 2023
|  |  |  | Additions |  |  |  |
|  |  |  |  |  | Charged |  |  |  |
|  | Balance at |  | Charged |  | (Credited) |  |  |  | Balance at
|  | Beginning |  | to |  | to Other |  |  |  | End
Classification |  | of Year |  | Income |  | Accounts |  | Deductions(1) |  | of Year
|  | (thousands of dollars)
2025: |  |  |  |  |  |  |  |  |  |
Reserve for uncollectible accounts |  | $ | 5,699 |  |  | $ | 3,009 |  |  | $ | 471 |  |  | $ | 4,754 |  |  | $ | 4,425 |
Injuries and damages |  | 3,627 |  |  | 799 |  |  | — |  |  | 1,473 |  |  | 2,953 |
2024: |  |  |  |  |  |  |  |  |  |
Reserve for uncollectible accounts |  | $ | 5,585 |  |  | $ | 4,523 |  |  | $ | 1,302 |  |  | $ | 5,711 |  |  | $ | 5,699 |
Injuries and damages |  | 3,275 |  |  | 992 |  |  | — |  |  | 640 |  |  | 3,627 |
2023: |  |  |  |  |  |  |  |  |  |
Reserve for uncollectible accounts |  | $ | 5,546 |  |  | $ | 3,527 |  |  | $ | 975 |  |  | $ | 4,463 |  |  | $ | 5,585 |
Injuries and damages |  | 2,802 |  |  | 974 |  |  | — |  |  | 501 |  |  | 3,275 |
(1) Represents deductions from the reserves for purposes for which the reserves were created. In the case of uncollectible accounts, and notes reserves, includes reversals of amounts previously reserved.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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