v3.25.1
FAIR VALUE MEASUREMENTS: Level 4 (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] $ 150,565 $ 146,308
Derivative Assets 13,687 0
Equity Securities, FV-NI 38,435 39,772
Derivative Liabilities 16,004 16,259
Idaho Power Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 420,488 158,999
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] 150,565 146,308
Derivative Assets 13,687 0
Equity Securities, FV-NI 38,435 39,772
Assets, Fair Value Disclosure [1] 0 0
Derivative Liabilities 4,213 4,003
Fair Value, Inputs, Level 1 [Member] | Idaho Power Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 420,488 158,999
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] 0 0
Derivative Assets 0 0
Equity Securities, FV-NI 0 0
Assets, Fair Value Disclosure [1] 0 0
Derivative Liabilities 11,791 12,256
Fair Value, Inputs, Level 2 [Member] | Idaho Power Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 0 0
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] 0 0
Derivative Assets 0 0
Equity Securities, FV-NI 0 0
Assets, Fair Value Disclosure [1] 0 0
Derivative Liabilities 0 0
Fair Value, Inputs, Level 3 [Member] | Idaho Power Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 0 0
Fair Value Measured at Net Asset Value Per Share    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure [1] $ 4,801 $ 4,099
[1] Holding company only. Does not include amounts held by Idaho Power.