v3.25.1
FAIR VALUE MEASUREMENTS: Fair Value, by Balance Sheet Grouping (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Corporate Fixed-Income And Asset-Backed Debt Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value $ 2,300 $ 2,700
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes Receivable [1] 2,155 2,155
Held-to-maturity securities [1],[2] 32,466 32,151
Long-term debt [1] 3,447,008 3,073,662
Carrying Amount | Idaho Power Company    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity securities [1],[2] 32,466 32,151
Long-term debt [1] 3,447,008 3,073,662
Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes Receivable [1] 2,155 2,155
Held-to-maturity securities [1],[2] 30,154 29,428
Long-term debt [1] 3,226,230 2,807,803
Estimated Fair Value | Idaho Power Company    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity securities [1],[2] 30,154 29,428
Long-term debt [1] $ 3,226,230 $ 2,807,803
[1]
(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 12 - "Fair Value Measurements."
[2]
(2) All held-to-maturity securities are carried at amortized cost and were in a gross unrealized holding loss position totaling $2.3 million and $2.7 million as of March 31, 2025, and December 31, 2024, respectively. Substantially all of these debt securities mature between 2027 and 2038. Based on ongoing credit evaluations of these holdings, Idaho Power does not expect payment defaults or delinquencies and had not recorded an allowance for credit losses for these securities as of March 31, 2025, and December 31, 2024.