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FAIR VALUE MEASUREMENTS: Fair Value Measurements Level 3 (Tables)
 12 Months Ended
Dec. 31, 2025
Fair value measurements [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following table presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis as of December 31 (in thousands of dollars): 
20252024
Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:    
Money market funds and commercial paper
IDACORP(1)
$62,012 $— $— $62,012 $146,308 $— $— $146,308 
Idaho Power110,602 — — 110,602 158,999 — — 158,999 
Derivatives— 3 — 3 — — — — 
Equity securities38,448 — — 38,448 39,772 — — 39,772 
IDACORP assets measured at NAV (not subject to hierarchy disclosure)(1)
— — — 5,948 — — — 4,099 
Liabilities:
Derivatives$8,186 $11,533 $— $19,719 $4,003 $12,256 $— $16,259 
(1) Holding company only. Does not include amounts held by Idaho Power.
Fair Value, by Balance Sheet Grouping
The table below presents the carrying value and estimated fair value of financial instruments that are not reported at fair value, as of December 31, using available market information and appropriate valuation methodologies (in thousands of dollars).
 20252024
 Carrying AmountEstimated Fair ValueCarrying AmountEstimated Fair Value
IDACORP    
Assets:    
Notes receivable(1)
$1,507 $1,507 $2,155 $2,155 
Held-to-maturity securities(1)
33,822 32,468 32,151 29,428 
Liabilities:    
Long-term debt (including current portion)(1)
3,447,338 3,270,200 3,073,662 2,807,803 
Idaho Power    
Assets:
Held-to-maturity securities(1)
$33,822 $32,468 $32,151 $29,428 
Liabilities:    
Long-term debt (including current portion)(1)
3,447,338 3,270,200 3,073,662 2,807,803 
(1) Notes receivable are categorized as Level 3 and held-to-maturity securities and long-term debt are categorized as Level 2 of the fair value hierarchy, as defined earlier in this Note 17 - "Fair Value Measurements."