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Idaho Power Company Consolidated Statements of Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Operating Revenues:      
Electric utility revenues $ 1,762,894 $ 1,641,040 $ 1,455,410
Operating Expenses:      
Purchased power 501,531 544,345 393,691
Fuel expense 275,405 230,210 180,550
Power cost adjustment 6,885 (100,659) (49,844)
Other operations and maintenance 399,855 399,375 361,297
Energy efficiency programs 31,948 33,197 29,920
Depreciation 195,341 170,077 175,555
Other electric utility operating expenses 38,550 37,325 34,673
Total electric utility expenses 1,449,515 1,313,870 1,125,842
Operating income 313,477 327,178 329,651
Nonoperating (Income) Expense:      
Allowance for equity funds used during construction (43,221) (37,285) (31,537)
Earnings of unconsolidated equity-method investments (12,426) (11,511) (11,435)
Interest on long-term debt 116,216 87,259 84,145
Other interest 20,253 16,030 14,546
Allowance for borrowed funds used during construction (20,012) (13,914) (11,993)
Other (income) expense, net (36,522) (10,805) 3,141
Total nonoperating expense, net 24,288 29,774 46,867
Income before income taxes 289,189 297,404 282,784
Income Tax Expense 27,296 37,844 36,912
Net Income 261,893 259,560 245,872
Idaho Power Company      
Operating Revenues:      
Electric utility revenues 1,762,894 1,641,040 1,455,410
Operating Expenses:      
Purchased power 501,531 544,345 393,691
Fuel expense 275,405 230,210 180,550
Power cost adjustment 6,885 (100,659) (49,844)
Other operations and maintenance 399,855 399,375 361,297
Energy efficiency programs 31,948 33,197 29,920
Depreciation 195,341 170,077 175,555
Other electric utility operating expenses 38,550 37,325 34,673
Total electric utility expenses 1,449,515 1,313,870 1,125,842
Operating income 313,379 327,170 329,568
Nonoperating (Income) Expense:      
Allowance for equity funds used during construction (43,221) (37,285) (31,537)
Earnings of unconsolidated equity-method investments (10,540) (10,211) (10,211)
Interest on long-term debt 116,216 87,259 84,145
Other interest 19,913 15,693 14,511
Allowance for borrowed funds used during construction (20,012) (13,914) (11,993)
Other (income) expense, net (34,713) (9,147) 3,171
Total nonoperating expense, net 27,643 32,395 48,086
Income before income taxes 285,736 294,775 281,482
Income Tax Expense 28,926 39,908 38,257
Net Income $ 256,810 $ 254,867 $ 243,225