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Idaho Power Company Consolidated Statements of Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating Revenues:      
Electric utility revenues $ 1,809,609 $ 1,822,965 $ 1,762,894
Operating Expenses:      
Purchased power 392,462 425,082 501,531
Fuel expense 253,236 259,204 275,405
Power cost adjustment 24,997 89,757 6,885
Other operations and maintenance 470,537 460,951 399,855
Energy efficiency programs 30,480 27,580 31,948
Depreciation 251,072 223,410 195,341
Other electric utility operating expenses 31,408 8,798 38,550
Total electric utility expenses 1,454,192 1,494,782 1,449,515
Operating income 353,976 327,839 313,477
Nonoperating (Income) Expense:      
Allowance for equity funds used during construction (62,489) (53,238) (43,221)
Earnings of unconsolidated equity-method investments (4,922) (4,539) (12,426)
Interest on long-term debt 174,929 139,196 116,216
Other interest 29,473 24,454 20,253
Allowance for borrowed funds used during construction (36,211) (27,785) (20,012)
Other (income) expense, net (57,222) (55,253) (36,522)
Total nonoperating expense, net 43,558 22,835 24,288
Income before income taxes 310,418 305,004 289,189
Income Tax Expense (13,715) 15,053 27,296
Net Income 324,133 289,951 261,893
Idaho Power Company      
Operating Revenues:      
Electric utility revenues 1,809,609 1,822,965 1,762,894
Operating Expenses:      
Purchased power 392,462 425,082 501,531
Fuel expense 253,236 259,204 275,405
Power cost adjustment 24,997 89,757 6,885
Other operations and maintenance 470,537 460,951 399,855
Energy efficiency programs 30,480 27,580 31,948
Depreciation 251,072 223,410 195,341
Other electric utility operating expenses 31,408 8,798 38,550
Total electric utility expenses 1,454,192 1,494,782 1,449,515
Operating income 355,417 328,183 313,379
Nonoperating (Income) Expense:      
Allowance for equity funds used during construction (62,489) (53,238) (43,221)
Earnings of unconsolidated equity-method investments (2,984) (2,671) (10,540)
Interest on long-term debt 174,929 139,196 116,216
Other interest 29,035 24,105 19,913
Allowance for borrowed funds used during construction (36,211) (27,785) (20,012)
Other (income) expense, net (49,548) (49,710) (34,713)
Total nonoperating expense, net 52,732 29,897 27,643
Income before income taxes 302,685 298,286 285,736
Income Tax Expense (13,177) 17,681 28,926
Net Income $ 315,862 $ 280,605 $ 256,810