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INCOME TAXES: Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation |  |  |
Federal income tax expense at statutory rate | $ 60,583 | $ 62,333 | $ 59,317
AFUDC | (13,279) | (10,752) | (9,141)
Capitalized interest | 3,097 | 1,633 | 1,077
Investment tax credits | (5,451) | (3,119) | (2,866)
Removal costs | (6,312) | (4,900) | (3,302)
Capitalized overhead costs | (2,100) | (3,150) | (8,190)
Capitalized repair costs | (24,360) | (19,320) | (17,430)
State income taxes, net of federal benefit | 15,802 | 18,139 | 11,359
Depreciation | 18,041 | 11,897 | 14,233
Excess deferred income tax reversal | (10,684) | (11,405) | (8,958)
Income tax return adjustments | (8,229) | (2,692) | 3,169
Affordable housing tax credits | (6,869) | (6,362) | (6,245)
Affordable housing investment distributions | (507) | (812) | (1,010)
Affordable housing investment amortization | 5,570 | 4,355 | 4,095
Other, net | 1,994 | 1,999 | 804
Total income tax expense | $ 27,296 | $ 37,844 | $ 36,912
Effective tax rate | 9.50% | 12.70% | 13.10%
Idaho Power Company |  |  |
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation |  |  |
Federal income tax expense at statutory rate | $ 60,005 | $ 61,903 | $ 59,111
AFUDC | (13,279) | (10,752) | (9,141)
Capitalized interest | 3,097 | 1,633 | 1,077
Investment tax credits | (5,451) | (3,119) | (2,866)
Removal costs | (6,312) | (4,900) | (3,302)
Capitalized overhead costs | (2,100) | (3,150) | (8,190)
Capitalized repair costs | (24,360) | (19,320) | (17,430)
State income taxes, net of federal benefit | 16,081 | 18,352 | 11,633
Depreciation | 18,041 | 11,897 | 14,233
Excess deferred income tax reversal | (10,684) | (11,405) | (8,958)
Income tax return adjustments | (7,732) | (2,827) | 1,759
Affordable housing tax credits | 0 | 0 | 0
Affordable housing investment distributions | 0 | 0 | 0
Affordable housing investment amortization | 0 | 0 | 0
Other, net | 1,620 | 1,596 | 331
Total income tax expense | $ 28,926 | $ 39,908 | $ 38,257
Effective tax rate | 10.10% | 13.50% | 13.60%

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to affordable housing investment amortization. + References No definition available. + Details
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