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INCOME TAXES: Level 3 (Tables)
6 Months Ended
Jun. 30, 2024
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
The following table provides a summary of income tax expense for the six months ended June 30, 2024 and 2023 (in thousands): 
 IDACORPIdaho Power
 2024202320242023
Income tax at statutory rates (federal and state)$36,090 $36,010 $35,555 $35,697 
Excess deferred income tax reversal(5,023)(5,342)(5,023)(5,342)
Other(1)
(8,550)(7,942)(7,091)(6,961)
Income tax expense before additional ADITC amortization$22,517 $22,726 $23,441 $23,394 
Additional ADITC amortization(20,000)(7,500)(20,000)(7,500)
Income tax expense$2,517 $15,226 $3,441 $15,894 
Effective tax rate1.8 %10.9 %2.5 %11.5 %
(1) "Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.