IDAHO POWER CO, 10-Q filed on 4/30/2026
Quarterly Report
v3.26.1
Cover
 3 Months Ended
Mar. 31, 2026
segment
Apr. 24, 2026
shares
Document Information    
Number of Reportable Segments | segment 1  
Number of Operating Segments | segment 1  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 1-14465  
Entity Registrant Name IDACORP, Inc.  
Entity Tax Identification Number 82-0505802  
Entity Address, Address Line One 1221 W. Idaho Street  
Entity Address, City or Town Boise,  
Entity Address, State or Province ID  
Entity Address, Postal Zip Code 83702-5627  
City Area Code (208)  
Local Phone Number 388-2200  
Entity Current Reporting Status Yes  
Entity Incorporation, State or Country Code ID  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common Stock  
Trading Symbol IDA  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding | shares   55,408,235
Entity Central Index Key 0001057877  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Information, Former Legal or Registered Name None  
Idaho Power Company    
Document Information    
No Trading Symbol Flag true  
Entity File Number 1-3198  
Entity Registrant Name Idaho Power Company  
Entity Tax Identification Number 82-0130980  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding | shares   39,150,812
Entity Central Index Key 0000049648  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
v3.26.1
Consolidated Statements of Income Statement - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating Revenues:    
Electric utility revenues $ 402,762 $ 431,952
Other 650 505
Total operating revenues 403,412 432,457
Operating Expenses:    
Purchased power 65,081 74,109
Fuel expense 63,729 69,401
Power cost adjustment (9,293) 47,685
Other operations and maintenance 126,126 113,007
Energy efficiency programs 6,171 5,232
Depreciation and amortization 65,519 59,785
Other operating expenses, net 4,130 7,682
Total electric utility operating expenses 321,463 376,901
Other 740 627
Total operating expenses 322,203 377,528
Operating Income 81,209 54,929
Nonoperating (Income) Expense:    
Allowance for equity funds used during construction (19,604) (14,441)
Earnings of unconsolidated equity-method investments (746) (717)
Interest on long-term debt and finance leases 47,773 38,168
Other interest 7,352 6,481
Allowance for borrowed funds used during construction (10,972) (7,651)
Other income, net (11,063) (14,106)
Total nonoperating expense, net 12,740 7,734
Income Before Income Taxes 68,469 47,195
Income Tax Expense (Benefit) 411 (12,466)
Net Income 68,058 59,661
Income attributable to noncontrolling interests (77) (14)
Net Income Attributable to IDACORP, Inc. $ 67,981 $ 59,647
Weighted-average common shares outstanding - basic (in shares) 55,023 54,110
Weighted-average common shares outstanding - diluted (in shares) 56,289 54,126
Earnings Per Share of Common Stock:    
Earnings attributable to IDACORP, Inc. - basic (in dollars per share) $ 1.24 $ 1.10
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share) $ 1.21 $ 1.10
v3.26.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Statement of Comprehensive Income [Abstract]    
Net income $ 68,058 $ 59,661
Other Comprehensive Income:    
Unfunded pension liability adjustment, net of tax of $75, and $188, respectively 221 (60)
Total Comprehensive Income 68,279 59,601
Comprehensive income attributable to noncontrolling interests (77) (14)
Comprehensive Income Attributable to IDACORP, Inc. $ 68,202 $ 59,587
v3.26.1
Consolidated Balance Sheets Statement - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Current Assets:    
Cash and cash equivalents $ 337,765 $ 215,718
Receivables:    
Customer 99,400 97,724
Other 27,647 37,764
Income taxes receivable 0 8,669
Accrued unbilled revenues 78,573 79,931
Materials and supplies (at average cost) 203,341 201,896
Fuel stock (at average cost) 24,989 24,455
Prepayments 24,982 30,579
Current regulatory assets 125,333 136,665
Other 29 3
Total current assets 1,046,541 833,404
Investments 151,706 155,002
Property, Plant and Equipment:    
Utility plant in service 8,173,576 8,249,106
Accumulated provision for depreciation (2,582,363) (2,599,465)
Utility plant in service - net 5,591,213 5,649,641
Construction work in progress 1,944,909 1,740,809
Finance lease right-of-use assets 216,779 219,612
Utility plant held for future use 20,637 19,781
Other property, net of accumulated depreciation 19,118 18,103
Property, plant, and equipment - net 7,792,656 7,647,946
Other Assets:    
Company-owned life insurance 109,124 105,306
Regulatory assets 1,431,495 1,427,793
Other 56,258 55,986
Total other assets 1,596,877 1,589,085
Total assets 10,587,780 10,225,437
Current Liabilities:    
Current maturities of long-term debt 116,300 116,300
Accounts payable 281,359 344,870
Taxes accrued 23,670 7,532
Interest accrued 35,212 49,547
Accrued compensation 54,500 77,245
Current regulatory liabilities 75,173 21,089
Advances from customers 195,598 201,743
Other 74,192 79,509
Total current liabilities 864,781 897,835
Other Liabilities:    
Deferred Income Tax 800,434 802,885
Regulatory liabilities 1,002,502 1,031,062
Pension and other postretirement benefits 142,646 137,406
Finance lease liabilities 215,184 216,695
Other 235,684 229,830
Total other liabilities 2,396,450 2,417,878
Long-Term Debt 3,677,816 3,331,038
Commitments and Contingencies
Equity:    
Common stock 1,352,535 1,301,907
Retained earnings 2,304,032 2,284,911
Accumulated other comprehensive loss (14,723) (14,944)
Total IDACORP, Inc. shareholders’ equity 3,641,844 3,571,874
Noncontrolling interests 6,889 6,812
Total equity 3,648,733 3,578,686
Total $ 10,587,780 $ 10,225,437
v3.26.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating Activities:    
Net income $ 68,058 $ 59,661
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 67,993 60,818
Deferred income taxes and investment tax credits (6,720) (22,980)
Changes in regulatory assets and liabilities (6,460) 69,310
Pension and postretirement benefit plan expense 11,287 11,287
Contributions to pension and postretirement benefit plans (1,225) (1,495)
Earnings of unconsolidated equity-method investments (746) (717)
Distributions from equity-method investments 900 3,200
Allowance for equity funds used during construction (19,604) (14,441)
Other non-cash adjustments to net income, net 2,135 3,779
Change in:    
Accounts receivable and unbilled receivables 22,302 5,870
Prepayments 5,033 4,067
Materials, supplies, and fuel stock (1,979) (1,314)
Accounts and wages payable (62,735) (65,893)
Taxes accrued/receivable 24,807 25,797
Other assets and liabilities (27,232) (12,662)
Net cash provided by operating activities 75,814 124,287
Investing Activities:    
Additions to property, plant and equipment, net (371,527) (201,324)
Proceeds from Sale of Other Productive Assets 47,364 17,399
Proceeds from Sale of Intangible Assets 32,138 5,987
Other (4,370) (5,107)
Net cash used in investing activities (296,395) (183,045)
Financing Activities:    
Issuance of long-term debt 350,000 400,000
Discount on issuance of long-term debt (854) (3,072)
Retirement of long-term debt 0 (19,885)
Payments on finance lease liabilities (1,415) 0
Dividends on common stock (49,201) (46,932)
Issuance of Common Stock 52,930 1,550
Tax withholdings on net settlements of share-based awards (6,098) (3,295)
Other (2,734) (3,978)
Net cash provided by financing activities 342,628 324,388
Net increase in cash and cash equivalents 122,047 265,630
Cash and cash equivalents at beginning of the period 215,718 368,865
Cash and cash equivalents at end of the period 337,765 634,495
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest (net of amount capitalized) 51,961 40,080
Non-cash investing and financing activities:    
Additions to property, plant, and equipment in accounts payable $ 199,039 $ 174,145
v3.26.1
Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Common Stock
Common Stock Including Additional Paid in Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Total IDACORP, Inc. shareholders’ equity   $ 1,194,998     $ (13,592)  
Beginning balance at Dec. 31, 2024       $ 2,149,548   $ 7,001
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock Issued During Period, Value, New Issues   1,550        
Share-based compensation expense     $ 4,199      
Tax withholdings on net settlements of share-based awards   (3,294)        
Other   40        
Net Income Attributable to IDACORP, Inc. $ 59,647     59,647    
Common stock dividends       (46,696)    
Unfunded pension liability adjustment (net of tax) (60)       (60)  
Income attributable to noncontrolling interests (14)         14
Ending balance at Mar. 31, 2025 3,353,355     2,162,499   7,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Total IDACORP, Inc. shareholders’ equity 3,346,340 1,197,493     (13,652)  
Total IDACORP, Inc. shareholders’ equity 3,571,874 1,301,907     (14,944)  
Beginning balance at Dec. 31, 2025 3,578,686     2,284,911   6,812
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock Issued During Period, Value, New Issues   52,930        
Share-based compensation expense     $ 3,814      
Tax withholdings on net settlements of share-based awards   (6,098)        
Other   (18)        
Net Income Attributable to IDACORP, Inc. 67,981     67,981    
Common stock dividends       (48,860)    
Unfunded pension liability adjustment (net of tax) 221       221  
Income attributable to noncontrolling interests (77)         77
Ending balance at Mar. 31, 2026 3,648,733     $ 2,304,032   $ 6,889
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Total IDACORP, Inc. shareholders’ equity $ 3,641,844 $ 1,352,535     $ (14,723)  
v3.26.1
Idaho Power Company Consolidated Statements of Income - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Regulated Operating Revenue    
Electric utility revenues $ 402,762 $ 431,952
Operating Expenses [Abstract]    
Purchased power 65,081 74,109
Fuel expense 63,729 69,401
Power cost adjustment (9,293) 47,685
Other operations and maintenance 126,126 113,007
Energy efficiency programs 6,171 5,232
Depreciation and amortization 65,519 59,785
Other operating expenses, net 4,130 7,682
Total electric utility operating expenses 321,463 376,901
Operating Income 81,209 54,929
Nonoperating (Income) Expense:    
Allowance for equity funds used during construction (19,604) (14,441)
Earnings of unconsolidated equity-method investments (746) (717)
Interest on long-term debt and finance leases 47,773 38,168
Other interest 7,352 6,481
Allowance for borrowed funds used during construction (10,972) (7,651)
Other income, net (11,063) (14,106)
Total nonoperating expense, net 12,740 7,734
Income Before Income Taxes 68,469 47,195
Income Tax Expense (Benefit) 411 (12,466)
Net income 68,058 59,661
Idaho Power Company    
Regulated Operating Revenue    
Electric utility revenues 402,762 431,952
Operating Expenses [Abstract]    
Purchased power 65,081 74,109
Fuel expense 63,729 69,401
Power cost adjustment (9,293) 47,685
Other operations and maintenance 126,126 113,007
Energy efficiency programs 6,171 5,232
Depreciation and amortization 65,519 59,785
Other operating expenses, net 4,130 7,682
Total electric utility operating expenses 321,463 376,901
Operating Income 81,299 55,051
Nonoperating (Income) Expense:    
Allowance for equity funds used during construction (19,604) (14,441)
Earnings of unconsolidated equity-method investments (831) (650)
Interest on long-term debt and finance leases 47,773 38,168
Other interest 7,275 6,322
Allowance for borrowed funds used during construction (10,972) (7,651)
Other income, net (9,953) (12,166)
Total nonoperating expense, net 13,688 9,582
Income Before Income Taxes 67,611 45,469
Income Tax Expense (Benefit) 953 (12,658)
Net income $ 66,658 $ 58,127
v3.26.1
Idaho Power Company Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net income $ 68,058 $ 59,661
Other Comprehensive Income:    
Unfunded pension liability adjustment, net of tax of $75, and $188, respectively 221 (60)
Total Comprehensive Income 68,279 59,601
Idaho Power Company    
Net income 66,658 58,127
Other Comprehensive Income:    
Unfunded pension liability adjustment, net of tax of $75, and $188, respectively 221 (60)
Total Comprehensive Income $ 66,879 $ 58,067
v3.26.1
Idaho Power Company Consolidated Balance Sheet - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Current Assets:    
Cash and cash equivalents $ 337,765 $ 215,718
Receivables [Abstract]    
Customer 99,400 97,724
Other 27,647 37,764
Income taxes receivable 0 8,669
Accrued unbilled revenues 78,573 79,931
Materials and supplies (at average cost) 203,341 201,896
Fuel stock (at average cost) 24,989 24,455
Prepayments 24,982 30,579
Current regulatory assets 125,333 136,665
Disposal Group, Including Discontinued Operation, Assets 124,482 0
Other 29 3
Total current assets 1,046,541 833,404
Investments 151,706 155,002
Property, Plant and Equipment [Abstract]    
Utility plant in service 8,173,576 8,249,106
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation (2,582,363) (2,599,465)
Utility plant in service - net 5,591,213 5,649,641
Construction work in progress 1,944,909 1,740,809
Finance lease right-of-use assets 216,779 219,612
Utility plant held for future use 20,637 19,781
Other property, net of accumulated depreciation 19,118 18,103
Property, plant, and equipment - net 7,792,656 7,647,946
Other Assets:    
Company-owned life insurance 109,124 105,306
Regulatory assets 1,431,495 1,427,793
Other 56,258 55,986
Total other assets 1,596,877 1,589,085
Total assets 10,587,780 10,225,437
Current Liabilities:    
Current maturities of long-term debt 116,300 116,300
Accounts payable 281,359 344,870
Taxes accrued 23,670 7,532
Interest accrued 35,212 49,547
Accrued compensation 54,500 77,245
Current regulatory liabilities 75,173 21,089
Advances from customers 195,598 201,743
Disposal Group, Including Discontinued Operation, Liabilities 8,777 0
Other 74,192 79,509
Total current liabilities 864,781 897,835
Other Liabilities [Abstract]    
Deferred Income Tax 800,434 802,885
Regulatory liabilities 1,002,502 1,031,062
Pension and other postretirement benefits 142,646 137,406
Finance lease liabilities 215,184 216,695
Other 235,684 229,830
Total other liabilities 2,396,450 2,417,878
Long-Term Debt 3,677,816 3,331,038
Commitments and Contingencies
Equity [Abstract]    
Common stock 1,352,535 1,301,907
Retained earnings 2,304,032 2,284,911
Accumulated other comprehensive loss (14,723) (14,944)
Total IDACORP, Inc. shareholders’ equity 3,641,844 3,571,874
Total 10,587,780 10,225,437
Idaho Power Company    
Current Assets:    
Cash and cash equivalents 274,732 119,111
Receivables [Abstract]    
Customer 99,400 97,724
Other 27,462 37,108
Income taxes receivable 0 1,294
Accrued unbilled revenues 78,573 79,931
Materials and supplies (at average cost) 203,341 201,896
Fuel stock (at average cost) 24,989 24,455
Prepayments 24,828 30,447
Current regulatory assets 125,333 136,665
Disposal Group, Including Discontinued Operation, Assets 124,482 0
Other 29 3
Total current assets 983,169 728,634
Investments 87,742 89,103
Property, Plant and Equipment [Abstract]    
Utility plant in service 8,173,576 8,249,106
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation (2,582,363) (2,599,465)
Utility plant in service - net 5,591,213 5,649,641
Construction work in progress 1,944,909 1,740,809
Finance lease right-of-use assets 216,779 219,612
Utility plant held for future use 20,637 19,781
Other property, net of accumulated depreciation 7,840 6,715
Property, plant, and equipment - net 7,781,378 7,636,558
Other Assets:    
Company-owned life insurance 109,124 105,306
Regulatory assets 1,431,495 1,427,793
Other 49,713 49,502
Total other assets 1,590,332 1,582,601
Total assets 10,442,621 10,036,896
Current Liabilities:    
Current maturities of long-term debt 116,300 116,300
Accounts payable 280,764 342,501
Taxes accrued 21,147 7,532
Interest accrued 35,212 49,547
Accrued compensation 54,268 76,912
Current regulatory liabilities 75,173 21,089
Advances from customers 195,598 201,743
Disposal Group, Including Discontinued Operation, Liabilities 8,777 0
Other 62,495 64,209
Total current liabilities 853,595 883,388
Other Liabilities [Abstract]    
Deferred Income Tax 798,532 800,939
Regulatory liabilities 1,002,502 1,031,062
Pension and other postretirement benefits 142,646 137,406
Finance lease liabilities 215,184 216,695
Other 232,334 224,375
Total other liabilities 2,391,198 2,410,477
Long-Term Debt 3,677,816 3,331,038
Commitments and Contingencies
Equity [Abstract]    
Common stock 97,877 97,877
Premium on capital stock 1,197,258 1,107,258
Capital stock issuance costs (2,097) (2,097)
Retained earnings 2,241,697 2,223,899
Accumulated other comprehensive loss (14,723) (14,944)
Total IDACORP, Inc. shareholders’ equity 3,520,012 3,411,993
Total 10,442,621 10,036,896
Idaho Power Company | Subsidiary of Common Parent    
Current Liabilities:    
Accounts Payable, Other $ 3,861 $ 3,555
v3.26.1
Idaho Power Company Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net income $ 68,058 $ 59,661
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 67,993 60,818
Deferred income taxes and investment tax credits (6,720) (22,980)
Changes in regulatory assets and liabilities (6,460) 69,310
Pension and postretirement benefit plan expense 11,287 11,287
Contributions to pension and postretirement benefit plans (1,225) (1,495)
Earnings of unconsolidated equity-method investments (746) (717)
Distributions from equity-method investments 900 3,200
Allowance for equity funds used during construction (19,604) (14,441)
Other non-cash adjustments to net income, net 2,135 3,779
Change in:    
Accounts receivable and unbilled receivables 22,302 5,870
Prepayments 5,033 4,067
Materials, supplies, and fuel stock (1,979) (1,314)
Accounts and wages payable (62,735) (65,893)
Taxes accrued/receivable 24,807 25,797
Other assets and liabilities (27,232) (12,662)
Net cash provided by operating activities 75,814 124,287
Investing Activities:    
Additions to utility plant, net (371,527) (201,324)
Proceeds from Sale of Other Productive Assets 47,364 17,399
Proceeds from Sale of Intangible Assets 32,138 5,987
Other (4,370) (5,107)
Net cash used in investing activities (296,395) (183,045)
Financing Activities:    
Issuance of long-term debt 350,000 400,000
Discount on issuance of long-term debt (854) (3,072)
Retirement of long-term debt 0 (19,885)
Payments on finance lease liabilities (1,415) 0
Dividends on common stock (49,201) (46,932)
Issuance of Common Stock 52,930 1,550
Tax withholdings on net settlements of share-based awards 6,098 3,295
Other (2,734) (3,978)
Net cash provided by financing activities 342,628 324,388
Net increase in cash and cash equivalents 122,047 265,630
Cash and cash equivalents at beginning of the period 215,718 368,865
Cash and cash equivalents at end of the period 337,765 634,495
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest (net of amount capitalized) 51,961 40,080
Non-cash investing and financing activities:    
Additions to utility plant in accounts payable 199,039 174,145
Idaho Power Company    
Net income 66,658 58,127
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 67,850 60,675
Deferred income taxes and investment tax credits (8,461) (25,191)
Changes in regulatory assets and liabilities (6,460) 69,310
Pension and postretirement benefit plan expense 11,287 11,287
Contributions to pension and postretirement benefit plans (1,225) (1,495)
Earnings of unconsolidated equity-method investments (831) (650)
Distributions from equity-method investments 900 3,200
Allowance for equity funds used during construction (19,604) (14,441)
Other non-cash adjustments to net income, net (1,744) (770)
Change in:    
Accounts receivable and unbilled receivables 22,103 6,596
Prepayments 5,055 4,090
Materials, supplies, and fuel stock (1,979) (1,314)
Accounts and wages payable (60,955) (64,883)
Taxes accrued/receivable 14,909 19,160
Other assets and liabilities (27,037) (12,489)
Net cash provided by operating activities 60,466 111,212
Investing Activities:    
Additions to utility plant, net (371,481) (201,239)
Proceeds from Sale of Other Productive Assets 47,364 17,399
Proceeds from Sale of Intangible Assets 32,138 5,987
Other 1,285 1,178
Net cash used in investing activities (290,694) (176,675)
Financing Activities:    
Issuance of long-term debt 350,000 400,000
Discount on issuance of long-term debt (854) (3,072)
Retirement of long-term debt 0 (19,885)
Payments on finance lease liabilities (1,415) 0
Dividends on common stock (49,223) (46,971)
Capital contribution from parent 90,000 0
Other (2,659) (3,925)
Net cash provided by financing activities 385,849 326,147
Net increase in cash and cash equivalents 155,621 260,684
Cash and cash equivalents at beginning of the period 119,111 188,916
Cash and cash equivalents at end of the period 274,732 449,600
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest (net of amount capitalized) 51,884 39,920
Non-cash investing and financing activities:    
Additions to utility plant in accounts payable $ 199,039 $ 174,145
v3.26.1
Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Statement of Comprehensive Income [Abstract]    
Unfunded pension liability adjustment, tax $ 75 $ 188
v3.26.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Statement of Financial Position [Abstract]    
Accounts Receivable, Allowance for Credit Loss, Current $ 4,104 $ 3,788
Allowance for Doubtful Other Receivables, Current $ 665 $ 637
Common Stock, Shares Authorized 120,000,000 120,000,000
Common Stock, Shares, Issued 55,408,000 54,859,000
v3.26.1
Consolidated Statements of Equity (Parenthetical) - $ / shares
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Statement of Stockholders' Equity [Abstract]    
Common stock dividends, per share (in dollar per share) $ 0.88 $ 0.86
v3.26.1
Idaho Power Company Statement of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Unfunded pension liability adjustment, tax $ (75) $ (188)
Idaho Power Company    
Unfunded pension liability adjustment, tax $ (75) $ (188)
v3.26.1
Idaho Power company Consolidated Balance Sheet (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Accounts Receivable, Allowance for Credit Loss, Current $ 4,104 $ 3,788
Allowance for Doubtful Other Receivables, Current $ 665 $ 637
Common Stock, Shares Authorized 120,000,000 120,000,000
Common Stock, Shares, Issued 55,408,000 54,859,000
Idaho Power Company    
Accounts Receivable, Allowance for Credit Loss, Current $ 4,104 $ 3,788
Allowance for Doubtful Other Receivables, Current $ 665 $ 637
Common Stock, Par or Stated Value Per Share $ 2.50 $ 2.50
Common Stock, Shares Authorized 50,000,000 50,000,000
Common Stock, Shares, Issued 39,151,000 39,151,000
v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
This Quarterly Report on Form 10-Q is a combined report of IDACORP and Idaho Power. Therefore, these Notes to the Condensed Consolidated Financial Statements apply to both IDACORP and Idaho Power. However, Idaho Power makes no representation as to the information relating to IDACORP’s other operations.

Nature of Business
 
IDACORP is a holding company formed in 1998 whose principal operating subsidiary is Idaho Power. Idaho Power is an electric utility engaged in the generation, transmission, distribution, sale, and purchase of electric energy and capacity with a service area covering approximately 24,000 square miles in southern Idaho and eastern Oregon. On February 13, 2026, Idaho Power signed an asset purchase agreement with OTEC for the sale of Idaho Power's electric distribution business and certain transmission assets in the state of Oregon. Refer to Note 16 - "Assets Held For Sale" for additional information regarding the Oregon Sale. Idaho Power is regulated primarily by the state utility regulatory commissions of Idaho and Oregon and the FERC. Idaho Power is the parent of IERCo, a joint-owner of BCC, which mines and supplies coal to the Jim Bridger plant owned in part by Idaho Power.
 
IDACORP’s other notable subsidiaries include IFS, an investor in affordable housing and other real estate tax credit investments, and Ida-West, an operator of small PURPA-qualifying hydropower generation projects.

Regulation of Utility Operations
 
As a regulated utility, many of Idaho Power's fundamental business decisions are subject to the approval of governmental agencies, including the prices that Idaho Power is authorized to charge for its electric service. These approvals are a critical factor in determining IDACORP's and Idaho Power's results of operations and financial condition.

IDACORP's and Idaho Power's financial statements reflect the effects of the different ratemaking principles followed by the jurisdictions regulating Idaho Power. The application of accounting principles related to regulated operations sometimes results in Idaho Power recording expenses and revenues in a different period than when an unregulated entity would record such expenses and revenues. In these instances, the amounts are deferred or accrued as regulatory assets or regulatory liabilities on the balance sheet. Regulatory assets represent incurred costs that have been deferred because it is probable they will be recovered from customers through future rates. Regulatory liabilities represent obligations to make refunds to customers for previous collections, or represent amounts collected in advance of incurring an expense. The effects of applying these regulatory accounting principles to Idaho Power's operations are discussed in more detail in Note 3 - "Regulatory Matters."

Financial Statements
 
In the opinion of management of IDACORP and Idaho Power, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary to present fairly each company's condensed consolidated balance sheets as of March 31, 2026, condensed consolidated statements of income for the three months ended March 31, 2026 and 2025, and condensed consolidated cash flows for the three months ended March 31, 2026 and 2025. These adjustments are of a normal and recurring nature. These financial statements do not contain the complete detail or note disclosures concerning accounting policies and other matters that would be included in full-year financial statements and should be read in conjunction with the audited consolidated financial statements included in the 2025 Annual Report. The statements of income for the interim period are not necessarily indicative of the results to be expected for the full year. A change in management's estimates or assumptions could have a material impact on IDACORP's or Idaho Power's respective balance sheets and statements of income during the period in which such change occurred.
 
Management Estimates
 
Management makes estimates and assumptions when preparing financial statements in conformity with GAAP. These estimates and assumptions include, among others, those related to rate regulation, retirement benefits, contingencies, asset impairment, income taxes, unbilled receivables, and the allowance for uncollectible accounts. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the reporting period. These estimates involve judgments with respect to, among other things, future economic factors that are difficult to predict and are beyond management's control. Accordingly, actual results could differ from those estimates.

New and Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

There have been no recently adopted accounting pronouncements that have had a material impact on IDACORP's or Idaho Power's condensed consolidated financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

Other than those described in Note 1 - "Summary of Significant Accounting Policies" to the consolidated financial statements included in the 2025 Annual Report, there have been no additional recently issued accounting pronouncements not yet adopted that are expected to have a material impact on IDACORP's or Idaho Power's condensed consolidated financial statements.
v3.26.1
INCOME TAXES:
 3 Months Ended
Mar. 31, 2026
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
 
In accordance with interim reporting requirements, IDACORP and Idaho Power use an estimated annual effective tax rate for computing their provisions for income taxes. An estimate of annual income tax expense (or benefit) is made each interim period using estimates for annual pre-tax income, income tax adjustments, and tax credits. The estimated annual effective tax rates do not include discrete events such as tax law changes, examination settlements, accounting method changes, or adjustments to tax expense or benefits attributable to prior years. Discrete events are recorded in the interim period in which they occur or become known. The estimated annual effective tax rate is applied to year-to-date pre-tax income to determine income tax expense (or benefit) for the interim period consistent with the annual estimate. In subsequent interim periods, income tax expense (or benefit) for the period is computed as the difference between the year-to-date amount reported for the previous interim period and the current period's year-to-date amount.

Income Tax Expense

The following table provides a summary of income tax expense (benefit) (in thousands of dollars): 
 IDACORPIdaho Power
Three months ended
March 31,		Three months ended
March 31,
 2026202520262025
Income tax at statutory rates (federal and state)$17,118 $11,809 $16,922 $11,381 
Excess deferred income tax reversal(1,624)(2,431)(1,624)(2,431)
Other(1)
(8,833)(2,594)(8,095)(2,358)
Income tax expense before ADITC$6,661 $6,784 $7,203 $6,592 
Additional ADITC amortization(6,250)(19,250)(6,250)(19,250)
Income tax expense (benefit)$411 $(12,466)$953 $(12,658)
Effective tax rate0.6 %(26.4)%1.4 %(27.8)%
(1) "Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.
Supplemental Disclosure of Cash Flow Information

Supplemental cash flow information related to cash (refunded) paid for income taxes is presented below (in thousands of dollars):
Three months ended
March 31,
 20262025
IDACORP
Cash (refunded) paid for income taxes$(6,214)$— 
Idaho Power
Cash paid to IDACORP related to income taxes$— $— 
v3.26.1
REGULATORY MATTERS:
 3 Months Ended
Mar. 31, 2026
Public Utilities, Rate Matters [Abstract]  
Regulatory Matters REGULATORY MATTERS
 
Included below is a summary of Idaho Power's most recent general rate cases and base rate changes, as well as other recent or pending notable regulatory matters and proceedings.

Idaho and Oregon Rate Cases

Idaho Power's current base rates result from the IPUC and OPUC orders described in Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2025 Annual Report.

Idaho ADITC Mechanism

The 2018 Settlement Stipulation, 2023 Settlement Stipulation, and 2025 Settlement Stipulation are each described in Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2025 Annual Report. The 2025 Settlement Stipulation and the 2023 Settlement Stipulation modified the 2018 Settlement Stipulation in part. The 2023 Settlement Stipulation included provisions for the accelerated amortization of ADITCs to help achieve a minimum 9.12 percent Idaho ROE, while the 2025 Settlement Stipulation established an annual cap of $55 million on the amount of accelerated amortization of ADITCs for calendar year 2026 and thereafter and also modified the ADITC mechanism to include an additional amount of investment tax credits equal to the total of existing ADITCs not previously eligible for accelerated amortization under the mechanism and all investment tax credits generated through the end of calendar-year 2028.

Based on its estimate of full-year 2026 Idaho ROE, for the three months ended March 31, 2026, Idaho Power recorded $6.3 million in additional ADITC amortization under the 2025 Settlement Stipulation. Accordingly, as of March 31, 2026, approximately $159.6 million of additional ADITCs remained available for future use. Idaho Power recorded $19.3 million of additional ADITC amortization for the three months ended March 31, 2025, based on its then-current estimate of full-year 2025 Idaho ROE.

Power Cost Adjustment Mechanisms

In both its Idaho and Oregon jurisdictions, Idaho Power's power cost adjustment mechanisms address the volatility of power supply costs and provide for annual adjustments to the rates charged to its retail customers. The power cost adjustment mechanisms compare Idaho Power's actual net power supply costs (primarily fuel and purchased power less wholesale energy sales) against net power supply costs being recovered in Idaho Power's retail rates. Under the power cost adjustment mechanisms, certain differences between actual net power supply costs incurred by Idaho Power and costs being recovered in retail rates are recorded as a deferred charge or accrued as a credit on the balance sheets for future recovery or refund. The power supply costs deferred or accrued primarily result from changes in the levels of Idaho Power's own power generation, changes in contracted power purchase prices and volumes, changes in wholesale market prices and transaction volumes, and changes in fuel prices.

In April 2026, Idaho Power filed an application with the IPUC requesting a $51.6 million increase in PCA revenues as compared with the prior collection period, effective for the 2026-2027 PCA collection period from June 1, 2026 to May 31, 2027. The increase in PCA revenues is due primarily to a decrease in forecast hydroelectric generation for the April 2026 to March 2027 forecast period. As of the date of this report, the IPUC has not yet issued an order on the company's requested rate increase.
In February 2026, Idaho Power filed its annual power cost adjustment mechanism filing with the OPUC. The filing also requested recovery of 2025 incremental deferred wildfire mitigation costs. If approved as filed, the filing would result in an increase of $1.9 million in Oregon-jurisdictional rates, effective June 1, 2026. As of the date of this report, the OPUC has not issued an order on the company's requested rate increase.

In March 2026, Idaho Power filed the March forecast of its APCU with the OPUC. If the March forecast and October update are approved as filed, the 2026 composite APCU will result in an increase of $1.5 million in Oregon-jurisdictional revenues effective June 1, 2026. As of the date of this report, the OPUC has not issued an order on the company's requested rate increase.

Idaho Fixed Cost Adjustment Mechanism

The FCA mechanism, applicable to Idaho residential and small commercial customers, is designed to remove a portion of Idaho Power’s financial disincentive to invest in energy efficiency programs by separating (or decoupling) the recovery of fixed costs from the variable kilowatt-hour charge and linking it instead to a set amount per customer. Under Idaho Power's current rate design, recovery of a portion of fixed costs is included in the variable kilowatt-hour charge, which may result in over-collection or under-collection of fixed costs. To return over-collection to customers or to collect under-collection from customers, the FCA mechanism allows Idaho Power to accrue, or defer, the difference between the authorized fixed-cost recovery amount per customer and the actual fixed costs per customer recovered by Idaho Power during the year. The IPUC has discretion to cap the annual increase in the FCA recovery at 3 percent of base revenue, with any excess deferred for collection in a subsequent year.

In March 2026, Idaho Power filed its annual FCA update with the IPUC, requesting approval to recover its 2025 FCA balance of $2.0 million, a $5.1 million increase over the 2024 FCA regulatory liability balance of $3.1 million, over the period from June 1, 2026, to May 31, 2027. As of the date of this report, the IPUC has not yet issued an order on the company's requested rate increase.

Hells Canyon Complex Relicensing Costs

In December 2025, Idaho Power filed an application with the IPUC requesting a determination that Idaho Power's HCC relicensing expenditures from January 1, 2016 through year-end 2025 were prudently incurred, and thus eligible for inclusion in retail rates in a future regulatory proceeding. As of the date of this report, the case remains pending.

Wildfire Mitigation Cost Recovery

The 2025 Settlement Stipulation authorized Idaho Power to defer certain incremental O&M and insurance costs for wildfire mitigation efforts above the 2024 base through the earlier of the next general rate case or 2027. As of March 31, 2026, Idaho Power’s deferral balance of Idaho-jurisdiction costs related to the WMP was $89.6 million, of which $70.9 million is approved to be amortized and currently collected in Idaho rates.

In December 2025, Idaho Power filed its 2026-2028 WMP with the OPUC along with an application requesting authorization to defer for future recovery an estimated $3.1 million of newly identified incremental costs expected to be incurred in 2026 associated with expanded wildfire mitigation efforts. As of the date of this report, the case remains pending. As of March 31, 2026, Idaho Power’s deferral balance of Oregon-jurisdiction costs related to the WMP was $3.4 million, of which $0.6 million is approved to be amortized and currently collected in Oregon rates.
v3.26.1
REVENUES:
 3 Months Ended
Mar. 31, 2026
Revenues [Abstract]  
REVENUES: REVENUES
 
The following table provides a summary of electric utility operating revenues for IDACORP and Idaho Power (in thousands of dollars):
Three months ended
March 31,
 20262025
Revenue from contracts with customers$383,615 $411,142 
Alternative revenue programs and other revenues19,147 20,810 
Total electric utility operating revenues$402,762 $431,952 
Revenues from Contracts with Customers

The following table presents revenues from contracts with customers disaggregated by revenue source (in thousands of dollars):
Three months ended
March 31,
 20262025
Retail revenues:
Residential (includes $16,637 and $(2,193), respectively, related to the FCA)(1)
$203,597 $190,705 
Commercial (includes $206 and $(43), respectively, related to the FCA)(1)
96,655 97,852 
Industrial69,603 68,607 
Irrigation1,942 1,113 
Deferred revenue related to HCC relicensing AFUDC(2)
(9,114)(2,064)
Total retail revenues362,683 356,213 
Less: FCA mechanism revenues(1)
(16,843)2,236 
Wholesale energy sales4,812 19,548 
Transmission wheeling-related revenues17,324 19,442 
Energy efficiency program revenues6,171 5,232 
Other revenues from contracts with customers9,468 8,471 
Total revenues from contracts with customers$383,615 $411,142 
(1) The FCA mechanism is an alternative revenue program in the Idaho jurisdiction and does not represent revenue from contracts with customers.
(2) The IPUC allows Idaho Power to recover a portion of the AFUDC on construction work in progress related to the HCC relicensing process in its Idaho jurisdiction, even though the relicensing process is not yet complete and the costs have not been moved to utility plant in service. Effective October 1, 2025, Idaho Power began collecting $38.5 million annually. Prior to October 1, 2025, Idaho Power collected $8.8 million annually. For more information refer to Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2025 Annual Report. Amounts collected in the Idaho jurisdiction are recognized as deferred revenue until the license is issued and the accumulated license costs approved for recovery are placed in service.

Alternative Revenue Programs and Other Revenues

While revenues from contracts with customers make up most of Idaho Power’s revenues, the IPUC has authorized the use of an additional regulatory mechanism, the FCA mechanism, which may increase or decrease tariff-based retail customer rates. The FCA mechanism is described in Note 3 - "Regulatory Matters." The FCA mechanism revenues include only the initial recognition of FCA revenues when they meet the regulator-specified conditions for recognition. Revenue from contracts with customers excludes the portion of the tariff price representing FCA revenues that Idaho Power initially recorded in prior periods when revenues met regulator-specified conditions. When Idaho Power includes those amounts in the price of utility service and billed to customers, Idaho Power records such amounts as recovery of the associated regulatory asset or liability and not as revenues.

Derivative revenues include gains from settled electricity swaps and sales of electricity under forward sales contracts that are bundled with renewable energy credits. Related to these forward sales, Idaho Power simultaneously enters into forward purchases of electricity for the same quantity at the same location, which are recorded in purchased power on the condensed consolidated statements of income. For more information on settled electricity swaps, see Note 11 - "Derivative Financial Instruments."

The table below presents the FCA mechanism revenues and other revenues (in thousands of dollars):
Three months ended
March 31,
 20262025
FCA mechanism revenues$16,843 $(2,236)
Derivative revenues2,304 23,046 
Total alternative revenue programs and other revenues$19,147 $20,810 
Receivables and Allowance for Uncollectible Accounts

The following table provides a rollforward of the allowance for uncollectible accounts related to customer receivables (in thousands of dollars):
Three months ended
March 31,
 20262025
Balance at beginning of period$3,788 $5,071 
Additions to the allowance620 1,017 
Write-offs, net of recoveries(304)(606)
Balance at end of period$4,104 $5,482 
Allowance for uncollectible accounts as a percentage of customer receivables4.0 %4.0 %
v3.26.1
LONG-TERM DEBT
 3 Months Ended
Mar. 31, 2026
Debt Disclosure [Abstract]  
LONG-TERM DEBT LONG-TERM DEBT
Long-Term Debt Issuances, Maturities, and Redemptions

On February 27, 2026, Idaho Power issued $350 million in aggregate principal amount of 4.85% first mortgage bonds, secured medium-term notes, Series O, maturing on March 1, 2036.

Idaho Power First Mortgage Bonds

Idaho Power's issuance of long-term indebtedness is subject to the approval of the IPUC, OPUC, and WPSC. In February and March 2024, Idaho Power received orders from the IPUC, OPUC, and WPSC authorizing the company to issue and sell from time to time up to $1.2 billion in aggregate principal amount of debt securities and first mortgage bonds, subject to conditions specified in the orders. Authority from the IPUC is effective through December 31, 2026, subject to extensions upon request to the IPUC. The OPUC's and WPSC's orders do not impose a time limitation for issuances, but the OPUC order does impose a number of other conditions, including a requirement that the interest rates for the debt securities or first mortgage bonds fall within either (a) designated spreads over comparable U.S. Treasury rates or (b) a maximum interest rate limit of 8 percent. At March 31, 2026, $150 million remained available for debt issuance under the regulatory orders.

Idaho Power's Indenture of Mortgage and Deed of Trust, dated as of October 1, 1937, as amended and supplemented from time to time (Indenture), limits the amount of additional first mortgage bonds that Idaho Power may issue to the sum of (a) the principal amount of retired first mortgage bonds and (b) 60 percent of total unfunded property additions, as defined in the Indenture. As of March 31, 2026, the maximum amount of additional first mortgage bonds Idaho Power could issue under this test was approximately $2.1 billion. The Indenture also imposes a fixed cap of $5.5 billion on the aggregate amount of first mortgage bonds that may be outstanding under the Indenture, which cap may be amended under certain conditions. As of March 31, 2026, Idaho Power could issue approximately $1.7 billion of additional first mortgage bonds under that aggregate cap.
v3.26.1
COMMON STOCK:
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Common Stock COMMON STOCK
 
IDACORP Common Stock
 
During the three months ended March 31, 2026, IDACORP issued an aggregate of 549,104 shares of common stock using original issuances of shares. IDACORP granted 71,855 restricted stock unit awards and issued 54,714 shares of common stock to employees pursuant to the IDACORP, Inc. 2000 Long-Term Incentive and Compensation Plan, and issued an additional 31,837 shares of common stock pursuant to director equity compensation plans. IDACORP issued 10,297 shares of common stock pursuant to its IDACORP, Inc. Dividend Reinvestment and Stock Purchase Plan.

At-the-Market Offering Program: On May 20, 2024, IDACORP entered into an Equity Distribution Agreement pursuant to which it may issue, offer, and sell, from time to time, up to an aggregate gross sales price of $300 million of shares of its common stock through an ATM offering program, which includes the ability to enter into FSAs. At March 31, 2026, IDACORP had no remaining capacity under its ATM offering program.

During the three months ended March 31, 2026, IDACORP executed FSAs under its ATM offering program with various counterparties who borrowed and sold 1,101,391 shares of IDACORP’s common stock at an aggregate gross sales price of
$155.5 million, including approximately $1.9 million in commissions and fees payable by IDACORP to the counterparties upon settlement.

At March 31, 2026, IDACORP had the following FSAs outstanding under its ATM offering program (in thousands of dollars, except for shares and forward price amounts):
Maturity DateSharesNet Proceeds AvailableForward Price
March 31, 2027530,000$74,040$139.70
March 31, 2027245,83034,730141.28
March 31, 2027325,56144,995138.21
Total / Weighted Average Forward Price1,101,391$153,765$139.61

The FSAs will be physically settled with common shares issued by IDACORP, unless IDACORP elects to settle the agreements in net cash or net shares, subject to certain conditions. On a settlement date or dates, if IDACORP elects to physically settle the FSAs, IDACORP will issue shares of common stock to the various counterparties at the then-applicable forward sale price and receive issuance proceeds at that time.

At March 31, 2026, IDACORP could have settled all its outstanding FSAs under the ATM offering program with physical delivery of 1,101,391 shares of common stock to the counterparties in exchange for cash of $153.8 million. At March 31, 2026, IDACORP could have settled the FSAs with net delivery to various counterparties of approximately $1.3 million of cash or approximately 9,273 shares of common stock, if IDACORP had elected to net cash or net share settle, respectively. The FSAs have been classified as an equity transaction because they are indexed to IDACORP’s common stock and the other requirements necessary for equity classification are met. As a result of the equity classification, no gain or loss will be recognized within earnings due to subsequent changes in the fair value of the FSAs.

During the three months ended March 31, 2026, IDACORP settled the following FSAs under its ATM offering program (in thousands of dollars, except for settlement shares and forward settlement price amounts):
Settlement DateSettlement Shares
Net Cash Proceeds(1)
Forward Settlement Price
March 31, 2026198,086$22,777$114.99
March 31, 2026254,17028,952113.91
Total / Weighted Average Forward Settlement Price452,256$51,729$114.38
(1) Settlement of the FSAs is reflected in IDACORP’s equity.

Equity Forward Sale Agreements (2025 Series): On May 8, 2025, IDACORP announced a registered public offering of 4,504,505 shares of its common stock at a public offering price of $111.00 per share, for an aggregate amount of $500.0 million. In conjunction with this offering, underwriters exercised an option to purchase 675,675 additional shares for an additional aggregate amount of $75.0 million. The 5,180,180 shares were sold by IDACORP to the underwriters under FSAs, which provide for settlement on a settlement date or dates to be specified at IDACORP’s discretion, but which is expected to occur on or prior to November 9, 2026. The forward sale price was initially $107.67 per share and is subject to certain adjustments in accordance with the terms of the FSAs through the date or dates of settlement.

The FSAs will be physically settled with common shares issued by IDACORP, unless IDACORP elects to settle the agreements in net cash or net shares, subject to certain conditions. On a settlement date or dates, if IDACORP elects to physically settle the FSAs, IDACORP will issue shares of common stock to the various counterparties at the then-applicable forward sale price and receive issuance proceeds at that time.

At March 31, 2026, IDACORP could have settled the FSAs with physical delivery of 5,180,180 shares of common stock to the counterparties in exchange for cash of $560.3 million. The FSAs could have also been settled at March 31, 2026, with delivery of approximately $167.9 million of cash or approximately 1,194,767 shares of common stock to the counterparties, if IDACORP had elected to net cash or net share settle, respectively. The FSAs have been classified as an equity transaction because they are indexed to IDACORP’s common stock and the other requirements necessary for equity classification are met. As a result of the equity classification, no gain or loss will be recognized within earnings due to subsequent changes in the fair value of the FSAs.
FSA Earnings Per Share Dilution: Prior to settlement, the potentially issuable shares pursuant to the FSAs will be reflected in IDACORP’s diluted earnings per share calculations using the treasury stock method. Under this method, the number of shares of IDACORP’s common stock used in calculating diluted earnings per share for a reporting period would be increased by the number of shares, if any, that would be issued upon physical settlement of the FSAs, less the number of shares that could be purchased by IDACORP in the market with the proceeds received from issuance (based on the average market price during that reporting period). Share dilution occurs when the average market price of IDACORP’s stock during the reporting period is higher than the then-applicable forward sale price as of the end of the reporting period. For the three months ended March 31, 2026 and 2025, approximately 1,171,000 and zero incremental shares, respectively, were included in the calculation of diluted earnings per share related to the securities under the FSAs. See Note 7 - "Earnings Per Share" for additional information on IDACORP's diluted earnings per share.

Idaho Power Common Stock

During the three months ended March 31, 2026, IDACORP contributed $90 million of additional capital to Idaho Power. No additional shares of Idaho Power common stock were issued.

Restrictions on Dividends

Idaho Power’s ability to pay dividends on its common stock held by IDACORP and IDACORP’s ability to pay dividends on its common stock are limited to the extent payment of such dividends would violate the covenants in their respective credit facilities or Idaho Power’s Statement of Policy and Code of Conduct. A covenant under IDACORP’s credit facility and Idaho Power’s credit facility requires IDACORP and Idaho Power to maintain leverage ratios of consolidated indebtedness to consolidated total capitalization, as defined therein, of no more than 65 percent at the end of each fiscal quarter. At March 31, 2026, the leverage ratios for IDACORP and Idaho Power were 54 percent and 53 percent, respectively. Based on these restrictions, IDACORP’s and Idaho Power’s dividends were limited to $1.4 billion and $1.3 billion, respectively, at March 31, 2026. There are additional facility covenants, subject to exceptions, that prohibit or restrict the sale or disposition of property without consent and any agreements restricting dividend payments to IDACORP and Idaho Power from any material subsidiary. At March 31, 2026, IDACORP and Idaho Power were in compliance with those covenants.

Idaho Power’s Statement of Policy and Code of Conduct relating to transactions between and among Idaho Power, IDACORP, and other affiliates, which was approved by the IPUC in April 2008, provides that Idaho Power will not pay any dividends to IDACORP that will reduce Idaho Power’s common equity capital below 35 percent of its total adjusted capital without IPUC approval. At March 31, 2026, Idaho Power's common equity capital was 47 percent of its total adjusted capital. Further, Idaho Power must obtain approval from the OPUC before it can directly or indirectly loan funds or issue notes or give credit on its books to IDACORP.

Idaho Power’s articles of incorporation contain restrictions on the payment of dividends on its common stock if preferred stock dividends are in arrears. As of the date of this report, Idaho Power has no preferred stock outstanding.

In addition to contractual restrictions on the amount and payment of dividends, the Federal Power Act prohibits the payment of dividends from "capital accounts." The term "capital account" is undefined in the Federal Power Act or its regulations, but Idaho Power does not believe the restriction would limit Idaho Power's ability to pay dividends out of current year earnings or retained earnings.
v3.26.1
EARNINGS PER SHARE:
 3 Months Ended
Mar. 31, 2026
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE
The table below presents the computation of IDACORP’s basic and diluted earnings per share (in thousands of dollars and shares, except for per share amounts).
Three months ended
March 31,
 20262025
Numerator:  
Net income attributable to IDACORP, Inc.$67,981 $59,647 
Denominator:  
Weighted-average common shares outstanding - basic55,023 54,110 
Effect of dilutive securities(1)
1,266 16 
Weighted-average common shares outstanding - diluted56,289 54,126 
Basic earnings per share$1.24 $1.10 
Diluted earnings per share$1.21 $1.10 
(1) Includes the effect of dilutive securities related to FSAs. See Note 6 - "Common Stock" for additional information on IDACORP's FSAs.
v3.26.1
COMMITMENTS:
 3 Months Ended
Mar. 31, 2026
Disclosure Text Block Supplement [Abstract]  
COMMITMENTS COMMITMENTS
Purchase Obligations

During the three months ended March 31, 2026, IDACORP's and Idaho Power's contractual obligations, outside the ordinary course of business, did not change materially from the amounts disclosed in the notes to the consolidated financial statements in the 2025 Annual Report.

In April 2026, Idaho Power entered into fuel-related agreements, increasing its contractual purchase obligations by approximately $1.6 billion. This obligation commences in May 2030 and expires in May 2045.

Guarantees

Idaho Power guarantees its portion of reclamation activities and obligations at BCC, of which IERCo owns a one-third interest. This guarantee, which is renewed annually with the Wyoming Department of Environmental Quality (WDEQ), was $49.7 million at March 31, 2026, representing IERCo's one-third share of BCC's total reclamation obligation of $149.2 million. BCC has a reclamation trust fund set aside specifically for the purpose of paying these reclamation costs. At March 31, 2026, the value of BCC's reclamation trust fund exceeded WDEQ's guarantee requirement for the total reclamation obligation. BCC periodically assesses the adequacy of the reclamation trust fund and its estimate of future reclamation costs. To ensure that the reclamation trust fund maintains adequate reserves, BCC has the ability to, and does, add a per-ton surcharge to coal sales to the Jim Bridger plant. Because of the existence of the fund and the ability to apply a per-ton surcharge, the estimated fair value of this guarantee is minimal.

IDACORP and Idaho Power enter into financial agreements and power purchase and sale agreements that include indemnification provisions relating to various forms of claims or liabilities that may arise from the transactions contemplated by these agreements. Generally, a maximum obligation is not explicitly stated in the indemnification provisions and, therefore, the overall maximum amount of the obligation under such indemnification provisions cannot be reasonably estimated. IDACORP and Idaho Power periodically evaluate the likelihood of incurring costs under such indemnities based on their historical experience and the evaluation of the specific indemnities. As of March 31, 2026, management believes the likelihood is remote that IDACORP or Idaho Power would be required to perform under such indemnification provisions or otherwise incur any significant losses with respect to such indemnification obligations. Neither IDACORP nor Idaho Power has recorded any liability on their respective condensed consolidated balance sheets with respect to these indemnification obligations.
v3.26.1
CONTINGENCIES:
 3 Months Ended
Mar. 31, 2026
Loss Contingency [Abstract]  
Contingencies
IDACORP and Idaho Power have in the past and expect in the future to become involved in various claims, controversies, disputes, and other contingent matters, some of which involve litigation and regulatory or other contested proceedings. The ultimate resolution and outcome of litigation and regulatory proceedings is inherently difficult to determine, particularly where (a) the remedies or penalties sought are indeterminate, (b) the proceedings are in the early stages or the substantive issues have
not been well developed, or (c) the matters involve complex or novel legal theories or a large number of parties. In accordance with applicable accounting guidance, IDACORP and Idaho Power, as applicable, establish an accrual for legal proceedings when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. If the loss contingency at issue is not both probable and reasonably estimable, IDACORP and Idaho Power do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. As of the date of this report, IDACORP's and Idaho Power's accruals for loss contingencies are not material to their financial statements as a whole; however, future accruals could be material in a given period. IDACORP's and Idaho Power's determination is based on currently available information, and estimates presented in financial statements and other financial disclosures involve significant judgment and may be subject to significant uncertainty. For matters that affect Idaho Power's operations, Idaho Power intends to seek, to the extent permissible and appropriate, recovery through the ratemaking process of costs incurred, although there is no assurance that such recovery would be granted.

IDACORP and Idaho Power are parties to legal claims and legal, tax, and regulatory actions and proceedings in the ordinary course of business and, as noted above, record an accrual for associated loss contingencies when they are probable and reasonably estimable. In connection with its utility operations, Idaho Power is subject to claims by individuals, entities, and governmental agencies for damages for alleged personal injury, property damage, and economic losses, relating to the company’s provision of electric service, the operation of its power supply, transmission, and distribution facilities, and other aspects of its business. Some of those claims relate to electrical contacts, service quality, property damage, and wildfires. In recent years, utilities in the western United States have been subject to significant liability for personal injury, loss of life, property damage, trespass, and economic losses, and in some cases, punitive damages and criminal charges, associated with wildfires that originated from utility property, most commonly transmission and distribution lines. Idaho Power has also regularly received claims by governmental agencies and private landowners for damages for fires allegedly originating from Idaho Power’s transmission and distribution system. As of the date of this report, the companies believe that resolution of existing claims will not have a material adverse effect on their respective condensed consolidated financial statements.

Idaho Power actively monitors any pending or potential environmental regulations and executive orders related to environmental matters that may have a significant impact on its future operations. Given uncertainties regarding the outcome, timing, and compliance plans for these environmental matters, Idaho Power is unable to estimate the financial impact of any such regulations and orders.
v3.26.1
BENEFIT PLANS:
 3 Months Ended
Mar. 31, 2026
Retirement Benefits, Description [Abstract]  
Benefit Plans BENEFIT PLANS
Idaho Power has a noncontributory defined benefit pension plan (pension plan) and two nonqualified defined benefit plans for certain senior management employees called the SMSP. Idaho Power also has a nonqualified defined benefit pension plan for directors that was frozen in 2002. Remaining vested benefits from that plan are included with the SMSP in the disclosures below. The benefits under the pension plan are based on years of service and the employee’s final average earnings. Idaho Power also maintains a defined benefit postretirement benefit plan (consisting of health care and death benefits) that covers all employees who were enrolled in the active-employee group plan at the time of retirement as well as their spouses and
qualifying dependents. The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the three months ended March 31, 2026 and 2025 (in thousands of dollars).
Pension PlanSMSPPostretirement
Benefits		Total
 20262025202620252026202520262025
Service cost$8,307 $7,857 $240 $293 $188 $169 $8,735 $8,319 
Interest cost14,560 13,867 1,430 1,410 744 743 16,734 16,020 
Expected return on plan assets(18,549)(17,235)— — (455)(450)(19,004)(17,685)
Amortization of prior service cost2 2 56 55 275 344 333 401 
Amortization of net loss— — 240 173 (418)(440)(178)(267)
Net periodic benefit cost4,320 4,491 1,966 1,931 334 366 6,620 6,788 
Regulatory deferral of net periodic benefit cost(1)
(4,129)(4,297)— — — — (4,129)(4,297)
Previously deferred pension costs recognized(1)
8,796 8,796 — — — — 8,796 8,796 
Net periodic benefit cost recognized for financial reporting(1)(2)
$8,987 $8,990 $1,966 $1,931 $334 $366 $11,287 $11,287 
(1) Net periodic benefit costs for the pension plan are recognized for financial reporting based upon the authorization of each regulatory jurisdiction in which Idaho Power operates. Under IPUC order, the Idaho portion of net periodic benefit cost is recorded as a regulatory asset and is recognized in the income statement as those costs are recovered through rates.
(2) Of total net periodic benefit cost recognized for financial reporting, $9.7 million and $9.8 million, respectively, were recognized in "Other operations and maintenance" and $1.6 million and $1.5 million, respectively, were recognized in "Other income, net" on the condensed consolidated statements of income of the companies for the three months ended March 31, 2026 and 2025.
Idaho Power has no minimum contribution to its defined benefit pension plan required in 2026, and during the three months ended March 31, 2026, Idaho Power has made no contributions. Idaho Power may contribute up to $30 million in 2026 in a continued effort to balance the regulatory collection of these expenditures with the amount and timing of contributions, as well as to mitigate the cost of being in an underfunded position. The primary impact of pension contributions is on the timing of cash flows, as the timing of cost recovery lags behind contributions.

Idaho Power also has an Employee Savings Plan that complies with Section 401(k) of the Internal Revenue Code and covers substantially all employees. Idaho Power matches specified percentages of employee contributions to the Employee Savings Plan.
v3.26.1
DERIVATIVE FINANCIAL INSTRUMENTS:
 3 Months Ended
Mar. 31, 2026
General Discussion of Derivative Instruments and Hedging Activities [Abstract]  
DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS
Commodity Price Risk

Idaho Power is exposed to market risk relating to electricity, natural gas, and other fuel commodity prices, all of which are heavily influenced by supply and demand. Market risk may be influenced by market participants’ nonperformance of their contractual obligations and commitments, which affects the supply of or demand for the commodity. Idaho Power uses derivative instruments, such as physical and financial forward contracts, for both electricity and fuel to manage the risks relating to these commodity price exposures. The primary objectives of Idaho Power’s energy purchase and sale activity are to meet the demand of retail electric customers, maintain appropriate physical reserves to ensure reliability, and make economic use of temporary surpluses that may develop.

All of Idaho Power's derivative instruments have been entered into for the purpose of securing energy resources for future periods or economically hedging forecasted purchases and sales, though none of these instruments have been designated as cash flow hedges. Idaho Power offsets fair value amounts recognized on its balance sheet and applies collateral related to derivative instruments executed with the same counterparty under the same master netting agreement. Idaho Power does not offset a counterparty's current derivative contracts with the counterparty's long-term derivative contracts, although Idaho Power's master netting arrangements would allow current and long-term positions to be offset in the event of default. Also, in the event of default, Idaho Power's master netting arrangements would allow for the offsetting of all transactions executed under the master netting arrangement. These types of transactions may include non-derivative instruments, derivatives qualifying for scope exceptions, receivables and payables arising from settled positions, and other forms of non-cash collateral (such as letters of credit). These types of transactions are excluded from the offsetting presented in the derivative fair value and offsetting table that follows.
The table below presents the gains and losses on derivatives not designated as hedging instruments (in thousands of dollars):
Gain/(Loss) on Derivatives Recognized in Income(1)
Location of Realized Gain/(Loss) on Derivatives Recognized in IncomeThree months ended
March 31,
20262025
Financial swapsOperating revenues$871 $46 
Financial swapsPurchased power(2,564)(1,030)
Financial swapsFuel expense(26,512)(12,200)
Forward contractsOperating revenues35 366 
Forward contractsPurchased power(35)(444)
Forward contractsFuel expense(339)(603)
(1) Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.

Settlement gains and losses on electricity swap contracts are recorded on the income statement in operating revenues or purchased power depending on the forecasted position being economically hedged by the derivative contract. Settlement gains and losses on contracts for natural gas are reflected in fuel expense. Settlement gains and losses on diesel derivatives are recorded in other O&M expense. See Note 12 - "Fair Value Measurements" for additional information concerning the determination of fair value for Idaho Power’s assets and liabilities from price risk management activities.

Credit Risk

At March 31, 2026, Idaho Power did not have material credit risk exposure from financial instruments, including derivatives. Idaho Power monitors credit risk exposure through reviews of counterparty credit quality, corporate-wide counterparty credit exposure, and corporate-wide counterparty concentration levels. Idaho Power manages these risks by establishing credit and concentration limits on transactions with counterparties and requiring contractual guarantees, cash deposits, bonds, or letters of credit from counterparties or their affiliates, as deemed necessary. Idaho Power’s physical power contracts are commonly under WSPP, Inc. agreements, physical gas contracts are usually under North American Energy Standards Board contracts, and financial transactions are usually under International Swaps and Derivatives Association, Inc. contracts. These contracts typically contain adequate assurance clauses requiring collateralization if a counterparty has debt that is downgraded below investment grade by at least one rating agency.

Credit-Contingent Features

Certain of Idaho Power's derivative instruments contain provisions that require Idaho Power's unsecured debt to maintain an investment grade credit rating from Moody's Investors Service and Standard & Poor's Ratings Services. If Idaho Power's unsecured debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at March 31, 2026, was $47.5 million. As of March 31, 2026, Idaho Power posted $28.0 million of cash collateral related to this amount. If the credit-risk-related contingent features underlying these agreements were triggered on March 31, 2026, Idaho Power would have been required to pay or post collateral to its counterparties up to an additional $26.1 million to cover open liability positions as well as completed transactions that have not yet been paid.
Derivative Instrument Summary

The table below presents the fair values and locations of derivative instruments not designated as hedging instruments recorded on the balance sheets and reconciles the gross amounts of derivatives recognized as assets and as liabilities to the net amounts presented in the balance sheets (in thousands of dollars):
Asset DerivativesLiability Derivatives
 Balance Sheet LocationGross Fair ValueAmounts OffsetNet AssetsGross Fair ValueAmounts OffsetNet Liabilities
March 31, 2026
Current:    
Financial swapsOther current assets$143 $(114)$29 $114 $(114)$— 
Financial swapsOther current liabilities674 (674)— 25,716 (21,153)
(1)
4,563 
Forward contractsOther current liabilities— — — 905 — 905 
Long-term:  
Financial swapsOther assets3,092 (3,092)
(2)
— 2,072 (2,072)— 
Financial swapsOther liabilities216 (216)— 5,977 (216)5,761 
Forward contractsOther liabilities— — — 12,035 — 12,035 
Total $4,125 $(4,096)$29 $46,819 $(23,555)$23,264 
December 31, 2025
Current:  
Financial swapsOther current liabilities$2,535 $(2,535)$— $34,486 $(29,394)
(3)
$5,092 
Forward contractsOther current assets3 — 3 — — — 
Forward contractsOther current liabilities— — — 1,009 — 1,009 
Long-term:   
Financial swapsOther liabilities1,444 (1,444)— 7,479 (4,385)
(4)
3,094 
Forward contractsOther liabilities— — — 10,524 — 10,524 
Total $3,982 $(3,979)$3 $53,498 $(33,779)$19,719 
(1) Current liability derivative amounts offset include $20.5 million of collateral receivable at March 31, 2026.
(2) Long-term asset derivative amounts offset include $1.0 million of collateral payable at March 31, 2026.
(3) Current liability derivative amounts offset include $26.9 million of collateral receivable at December 31, 2025.
(4) Long-term liability derivative amounts offset include $2.9 million of collateral receivable at December 31, 2025.

The table below presents the volumes of derivative commodity forward contracts and swaps outstanding (in thousands of units):
March 31,
CommodityUnits20262025
Electricity purchasesMWh628 223 
Electricity salesMWh8 37 
Natural gas purchasesMMBtu132,308 95,363 
v3.26.1
FAIR VALUE MEASUREMENTS:
 3 Months Ended
Mar. 31, 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
IDACORP and Idaho Power have categorized their financial instruments into a three-level fair value hierarchy, based on the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure the financial instruments fall within different levels of the hierarchy, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.

Financial assets and liabilities recorded on the condensed consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows:
• Level 1: Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market that IDACORP and Idaho Power have the ability to access.

•   Level 2: Financial assets and liabilities whose values are based on the following:
a) quoted prices for similar assets or liabilities in active markets;
b) quoted prices for identical or similar assets or liabilities in non-active markets;
c) pricing models whose inputs are observable for substantially the full term of the asset or liability; and
d) pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full term of the asset or liability.

IDACORP and Idaho Power Level 2 inputs for derivative instruments are based on quoted market prices adjusted for location using corroborated, observable market data or using quoted price which may be in non-active markets.

•    Level 3: Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.

IDACORP’s and Idaho Power’s assessment of a particular input's significance to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. There were no transfers between levels or material changes in valuation techniques or inputs during the three months ended March 31, 2026.

Certain instruments have been valued using NAV as a practical expedient. The NAV is generally not published and publicly available, nor are these instruments traded on an exchange. Instruments valued using NAV as a practical expedient are included in the fair value disclosures below; however, in accordance with GAAP are not classified within the fair value hierarchy levels.

The following table presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis (in thousands of dollars):
March 31, 2026December 31, 2025
Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:    
Money market funds and commercial paper
IDACORP(1)
$4,076 $— $— $4,076 $62,012 $— $— $62,012 
Idaho Power256,083 — — 256,083 110,602 — — 110,602 
Derivatives29 — — 29 — 3 — 3 
Equity securities36,861 — — 36,861 38,448 — — 38,448 
IDACORP assets measured at NAV (not subject to hierarchy disclosure)(1)
— — — 5,883 — — — 5,948 
Liabilities:
Derivatives10,324 12,940 — 23,264 8,186 11,533 — 19,719 
(1) Holding company only. Does not include amounts held by Idaho Power.

Idaho Power’s derivatives are contracts entered into as part of its management of loads and resources. Electricity swap derivatives are valued on the Intercontinental Exchange (ICE) with quoted prices in an active market. Electricity forward contract derivatives are valued using a blend of two electricity exchanges, adjusted for location basis, as specified in the forward contract. Natural gas and diesel derivatives are valued using New York Mercantile Exchange (NYMEX) and ICE pricing, adjusted for location basis, which are also quoted under NYMEX and ICE pricing. Equity securities at Idaho Power consist of employee-directed investments related to an executive deferred compensation plan and actively traded money market and exchange traded funds related to the SMSP. The investments are measured using quoted prices in active markets and are held in a rabbi trust.
The table below presents the carrying value and estimated fair value of financial instruments that are not reported at fair value, using available market information and appropriate valuation methodologies (in thousands of dollars).
 March 31, 2026December 31, 2025
 Carrying AmountEstimated Fair ValueCarrying AmountEstimated Fair Value
IDACORP    
Assets:    
Notes receivable(1)
$1,507 $1,507 $1,507 $1,507 
Held-to-maturity securities(1)(2)
34,119 32,315 33,822 32,468 
Liabilities:    
Long-term debt (including current portion)(1)
3,794,116 3,565,887 3,447,338 3,270,200 
Idaho Power    
Assets:
Held-to-maturity securities(1)(2)
$34,119 $32,315 $33,822 $32,468 
Liabilities:    
Long-term debt (including current portion)(1)
3,794,116 3,565,887 3,447,338 3,270,200 
(1) Notes receivable are categorized as Level 3 and held-to-maturity securities and long-term debt are categorized as Level 2 of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements."
(2) All held-to-maturity securities are carried at amortized cost and were in a gross unrealized holding loss position totaling $1.8 million and $1.4 million as of March 31, 2026, and December 31, 2025, respectively. Substantially all of these debt securities mature between 2027 and 2038. Based on ongoing credit evaluations of these holdings, Idaho Power does not expect payment defaults or delinquencies and had not recorded an allowance for credit losses for these securities as of March 31, 2026, and December 31, 2025.

Notes receivable are related to Ida-West and are valued based on unobservable inputs, including forecasted cash flows, which are partially based on expected hydropower conditions. Held-to-maturity securities are held in a rabbi trust and are generally valued using quoted prices, which may be in non-active markets. Long-term debt is not traded on an exchange and is valued using quoted rates for similar debt in active markets. Carrying values for cash and cash equivalents, deposits, customer and other receivables, notes payable, accounts payable, interest accrued, and taxes accrued approximate fair value.
v3.26.1
SEGMENT INFORMATION:
 3 Months Ended
Mar. 31, 2026
Segment Reporting, Measurement Disclosures [Abstract]  
SEGMENT INFORMATION SEGMENT INFORMATION
 
IDACORP’s only reportable segment is utility operations. The utility operations segment’s primary source of revenue is the regulated operations of Idaho Power. Idaho Power’s regulated operations include the power supply, transmission, distribution, purchase, and sale of electricity. This segment also includes income from IERCo, a wholly-owned subsidiary of Idaho Power that is also subject to regulation and is a one-third owner of BCC, an unconsolidated investment.
 
IDACORP’s other operating segments are below the quantitative and qualitative thresholds for reportable segments and are included in the "All Other" category in the table below. This category consists of IFS’s investments in affordable housing and other real estate tax credit projects, Ida-West’s joint venture investments in small hydropower generation projects, and IDACORP’s holding company expenses.

IDACORP’s and Idaho Power’s chief operating decision maker is regularly provided with segment expense information for utility operations at the same level of detail as presented in Idaho Power’s condensed consolidated statements of income.
The table below summarizes the segment information for IDACORP’s utility operations and the total of all other segments, and reconciles this information to total enterprise amounts (in thousands of dollars). 
Utility
Operations		All
Other		EliminationsConsolidated
Total
Three months ended March 31, 2026:    
Revenues$402,762 $650 $— $403,412 
Depreciation and amortization65,519 — — 65,519 
Other income (expense), net22,182 (186)— 21,996 
Interest income including carrying charges on regulatory assets7,375 1,865 (569)8,671 
Earnings of unconsolidated equity-method investments831 (85)— 746 
Interest expense44,076 646 (569)44,153 
Income tax expense (benefit) 953 (542)— 411 
Net income attributable to IDACORP, Inc.66,658 1,323 — 67,981 
Expenditures for long-lived assets371,481 46 — 371,527 
Total assets as of March 31, 2026
10,442,621 213,338 (68,179)10,587,780 
Three months ended March 31, 2025:
Revenues$431,952 $505 $— $432,457 
Depreciation and amortization59,785 — — 59,785 
Other income (expense), net17,567 (351)— 17,216 
Interest income including carrying charges on regulatory assets9,040 3,053 (762)11,331 
Earnings of unconsolidated equity-method investments650 67 — 717 
Interest expense36,839 921 (762)36,998 
Income tax (benefit) expense(12,658)192 — (12,466)
Net income attributable to IDACORP, Inc.58,127 1,520 — 59,647 
Expenditures for long-lived assets201,239 85 — 201,324 
v3.26.1
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Notes)
 3 Months Ended
Mar. 31, 2026
Statement of Comprehensive Income [Abstract]  
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME
The table below presents changes in components of AOCI, net of tax, (in thousands of dollars). Items in parentheses indicate charges to AOCI.
Three months ended
March 31,
20262025
Defined benefit pension items
Balance at beginning of period$(14,944)$(13,592)
Other comprehensive income before reclassification— (229)
Amounts reclassified out of AOCI221 169 
Balance at end of period$(14,723)$(13,652)
The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified (in thousands of dollars). Items in parentheses indicate increases to net income.
Amount Reclassified from AOCI
Three months ended
March 31,
20262025
Amortization of defined benefit pension items(1)
Prior service cost$56 $55 
Net loss240 173 
Total before tax296 228 
Tax benefit(2)
(75)(59)
Total reclassification for the period, net of tax$221 $169 
(1) Amortization of these items is included in IDACORP's condensed consolidated statements of income in other operating expenses and in Idaho Power's condensed consolidated statements of income in other expense, net.
(2) The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.
v3.26.1
CHANGES IN IDAHO POWER RETAINED EARNINGS (Notes)
 3 Months Ended
Mar. 31, 2026
Changes in Idaho Power Retained Earnings [Abstract]  
CHANGES IN IDAHO POWER RETAINED EARNINGS CHANGES IN IDAHO POWER RETAINED EARNINGS
The table below presents changes in Idaho Power retained earnings (in thousands of dollars).
Three months ended
March 31,
20262025
Balance at beginning of period$2,223,899 $2,096,151 
Net income66,658 58,127 
Dividends to parent(48,860)(46,695)
Balance at end of period$2,241,697 $2,107,583 
v3.26.1
ASSETS HELD FOR SALE
 3 Months Ended
Mar. 31, 2026
Discontinued Operations and Disposal Groups [Abstract]  
Assets Held for Sale Disclosure ASSETS HELD FOR SALE
On February 13, 2026, Idaho Power executed a definitive agreement to sell its Oregon electric distribution business as well as certain Oregon transmission assets to OTEC. The base purchase price to be paid by OTEC for the Oregon Sale is $154 million, and is subject to certain adjustments at the closing of the transaction. Idaho Power has agreed to operate its Oregon electric distribution business and applicable transmission assets in the ordinary course of business and subject to certain operating covenants during the period between the date of the asset purchase agreement and the completion of the proposed transaction. Idaho Power also agreed to provide certain transition services to OTEC for a limited post-closing period for a fee. While Idaho Power expects the transaction to be completed within one year of March 31, 2026, the Oregon Sale is subject to various closing conditions, including approvals of the OPUC, IPUC, and FERC, as well as certain price adjustment and termination provisions.

Idaho Power determined that the assets and liabilities related to the Oregon Sale (disposal group) met the criteria for classification as held for sale as of March 31, 2026. Accordingly, the disposal group was reclassified to assets held for sale and liabilities held for sale, respectively, within the condensed consolidated balance sheets as of March 31, 2026. The disposal group is reported within IDACORP's Utility Operations reportable segment. See Note 13 - "Segment Information."

Upon reclassification, the disposal group was measured at the lower of its carrying amount or estimated fair value less costs to sell. As a result of this measurement, the fair value less costs to sell of the disposal group exceeds its net carrying amount as of March 31, 2026, and accordingly no impairment loss has been recognized for the three months ended March 31, 2026. Any gain on the Oregon Sale will be recognized upon closing of the transaction. Because depreciation and amortization of the assets and liabilities included in the disposal group continue to be reflected in Oregon customer rates through closing of the transaction, Idaho Power will continue recording depreciation and amortization on the disposal group through that date.

The disposal group has not been classified as a discontinued operation and the historical results of the disposal group are included in the condensed consolidated statements of income for all periods presented.
The table below summarizes components of assets and liabilities in the disposal group classified as held for sale on the condensed consolidated balance sheets (in thousands of dollars):
March 31, 2026
Assets held for sale:
Current regulatory assets$936 
Utility plant in service160,506 
Accumulated provision for depreciation(48,779)
Construction work in progress1,063 
Regulatory assets10,756 
Total assets held for sale(1)
$124,482 
Liabilities held for sale:
Current regulatory liabilities$297 
Regulatory liabilities8,480 
Total liabilities held for sale(1)
$8,777 
(1) Total assets held for sale and total liabilities held for sale are presented within current assets and current liabilities, respectively, on the condensed consolidated balance sheets as of March 31, 2026, as the sale is expected to be completed within 12 months.
v3.26.1
Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2026
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Organization, Consolidation, Presentation, and Significant Accounting Policies (Policies)
 3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]  
Nature of Business
IDACORP is a holding company formed in 1998 whose principal operating subsidiary is Idaho Power. Idaho Power is an electric utility engaged in the generation, transmission, distribution, sale, and purchase of electric energy and capacity with a service area covering approximately 24,000 square miles in southern Idaho and eastern Oregon. On February 13, 2026, Idaho Power signed an asset purchase agreement with OTEC for the sale of Idaho Power's electric distribution business and certain transmission assets in the state of Oregon. Refer to Note 16 - "Assets Held For Sale" for additional information regarding the Oregon Sale. Idaho Power is regulated primarily by the state utility regulatory commissions of Idaho and Oregon and the FERC. Idaho Power is the parent of IERCo, a joint-owner of BCC, which mines and supplies coal to the Jim Bridger plant owned in part by Idaho Power.
 
IDACORP’s other notable subsidiaries include IFS, an investor in affordable housing and other real estate tax credit investments, and Ida-West, an operator of small PURPA-qualifying hydropower generation projects.
Regulation of Utility Operations
As a regulated utility, many of Idaho Power's fundamental business decisions are subject to the approval of governmental agencies, including the prices that Idaho Power is authorized to charge for its electric service. These approvals are a critical factor in determining IDACORP's and Idaho Power's results of operations and financial condition.
IDACORP's and Idaho Power's financial statements reflect the effects of the different ratemaking principles followed by the jurisdictions regulating Idaho Power. The application of accounting principles related to regulated operations sometimes results in Idaho Power recording expenses and revenues in a different period than when an unregulated entity would record such expenses and revenues. In these instances, the amounts are deferred or accrued as regulatory assets or regulatory liabilities on the balance sheet. Regulatory assets represent incurred costs that have been deferred because it is probable they will be recovered from customers through future rates. Regulatory liabilities represent obligations to make refunds to customers for previous collections, or represent amounts collected in advance of incurring an expense.
Financial Statements In the opinion of management of IDACORP and Idaho Power, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary to present fairly each company's condensed consolidated balance sheets as of March 31, 2026, condensed consolidated statements of income for the three months ended March 31, 2026 and 2025, and condensed consolidated cash flows for the three months ended March 31, 2026 and 2025. These adjustments are of a normal and recurring nature. These financial statements do not contain the complete detail or note disclosures concerning accounting policies and other matters that would be included in full-year financial statements and should be read in conjunction with the audited consolidated financial statements included in the 2025 Annual Report. The statements of income for the interim period are not necessarily indicative of the results to be expected for the full year. A change in management's estimates or assumptions could have a material impact on IDACORP's or Idaho Power's respective balance sheets and statements of income during the period in which such change occurred.
Management Estimates
Management makes estimates and assumptions when preparing financial statements in conformity with GAAP. These estimates and assumptions include, among others, those related to rate regulation, retirement benefits, contingencies, asset impairment, income taxes, unbilled receivables, and the allowance for uncollectible accounts. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the reporting period. These estimates involve judgments with respect to, among other things, future economic factors that are difficult to predict and are beyond management's control. Accordingly, actual results could differ from those estimates.
New and Recently Adopted Accounting Pronouncements
New and Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

There have been no recently adopted accounting pronouncements that have had a material impact on IDACORP's or Idaho Power's condensed consolidated financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

Other than those described in Note 1 - "Summary of Significant Accounting Policies" to the consolidated financial statements included in the 2025 Annual Report, there have been no additional recently issued accounting pronouncements not yet adopted that are expected to have a material impact on IDACORP's or Idaho Power's condensed consolidated financial statements.
Income Tax
In accordance with interim reporting requirements, IDACORP and Idaho Power use an estimated annual effective tax rate for computing their provisions for income taxes. An estimate of annual income tax expense (or benefit) is made each interim period using estimates for annual pre-tax income, income tax adjustments, and tax credits. The estimated annual effective tax rates do not include discrete events such as tax law changes, examination settlements, accounting method changes, or adjustments to tax expense or benefits attributable to prior years. Discrete events are recorded in the interim period in which they occur or become known. The estimated annual effective tax rate is applied to year-to-date pre-tax income to determine income tax expense (or benefit) for the interim period consistent with the annual estimate. In subsequent interim periods, income tax expense (or benefit) for the period is computed as the difference between the year-to-date amount reported for the previous interim period and the current period's year-to-date amount.
Revenue Recognition The FCA mechanism revenues include only the initial recognition of FCA revenues when they meet the regulator-specified conditions for recognition. Revenue from contracts with customers excludes the portion of the tariff price representing FCA revenues that Idaho Power initially recorded in prior periods when revenues met regulator-specified conditions. When Idaho Power includes those amounts in the price of utility service and billed to customers, Idaho Power records such amounts as recovery of the associated regulatory asset or liability and not as revenues. Derivative revenues include gains from settled electricity swaps and sales of electricity under forward sales contracts that are bundled with renewable energy credits. Related to these forward sales, Idaho Power simultaneously enters into forward purchases of electricity for the same quantity at the same location, which are recorded in purchased power on the condensed consolidated statements of income.
Forward Sale Agreement, Policy The FSAs have been classified as an equity transaction because they are indexed to IDACORP’s common stock and the other requirements necessary for equity classification are met. As a result of the equity classification, no gain or loss will be recognized within earnings due to subsequent changes in the fair value of the FSAs.
Earnings Per Share, Policy Prior to settlement, the potentially issuable shares pursuant to the FSAs will be reflected in IDACORP’s diluted earnings per share calculations using the treasury stock method. Under this method, the number of shares of IDACORP’s common stock used in calculating diluted earnings per share for a reporting period would be increased by the number of shares, if any, that would be issued upon physical settlement of the FSAs, less the number of shares that could be purchased by IDACORP in the market with the proceeds received from issuance (based on the average market price during that reporting period). Share dilution occurs when the average market price of IDACORP’s stock during the reporting period is higher than the then-applicable forward sale price as of the end of the reporting period.
Commitments and Contingencies, Policy
IDACORP and Idaho Power have in the past and expect in the future to become involved in various claims, controversies, disputes, and other contingent matters, some of which involve litigation and regulatory or other contested proceedings. The ultimate resolution and outcome of litigation and regulatory proceedings is inherently difficult to determine, particularly where (a) the remedies or penalties sought are indeterminate, (b) the proceedings are in the early stages or the substantive issues have
not been well developed, or (c) the matters involve complex or novel legal theories or a large number of parties. In accordance with applicable accounting guidance, IDACORP and Idaho Power, as applicable, establish an accrual for legal proceedings when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. If the loss contingency at issue is not both probable and reasonably estimable, IDACORP and Idaho Power do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. As of the date of this report, IDACORP's and Idaho Power's accruals for loss contingencies are not material to their financial statements as a whole; however, future accruals could be material in a given period. IDACORP's and Idaho Power's determination is based on currently available information, and estimates presented in financial statements and other financial disclosures involve significant judgment and may be subject to significant uncertainty. For matters that affect Idaho Power's operations, Idaho Power intends to seek, to the extent permissible and appropriate, recovery through the ratemaking process of costs incurred, although there is no assurance that such recovery would be granted.
IDACORP and Idaho Power are parties to legal claims and legal, tax, and regulatory actions and proceedings in the ordinary course of business and, as noted above, record an accrual for associated loss contingencies when they are probable and reasonably estimable.
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges
Idaho Power is exposed to market risk relating to electricity, natural gas, and other fuel commodity prices, all of which are heavily influenced by supply and demand. Market risk may be influenced by market participants’ nonperformance of their contractual obligations and commitments, which affects the supply of or demand for the commodity. Idaho Power uses derivative instruments, such as physical and financial forward contracts, for both electricity and fuel to manage the risks relating to these commodity price exposures. The primary objectives of Idaho Power’s energy purchase and sale activity are to meet the demand of retail electric customers, maintain appropriate physical reserves to ensure reliability, and make economic use of temporary surpluses that may develop.
All of Idaho Power's derivative instruments have been entered into for the purpose of securing energy resources for future periods or economically hedging forecasted purchases and sales, though none of these instruments have been designated as cash flow hedges. Idaho Power offsets fair value amounts recognized on its balance sheet and applies collateral related to derivative instruments executed with the same counterparty under the same master netting agreement. Idaho Power does not offset a counterparty's current derivative contracts with the counterparty's long-term derivative contracts, although Idaho Power's master netting arrangements would allow current and long-term positions to be offset in the event of default. Also, in the event of default, Idaho Power's master netting arrangements would allow for the offsetting of all transactions executed under the master netting arrangement. These types of transactions may include non-derivative instruments, derivatives qualifying for scope exceptions, receivables and payables arising from settled positions, and other forms of non-cash collateral (such as letters of credit).
Derivatives, Reporting of Derivative Activity Settlement gains and losses on electricity swap contracts are recorded on the income statement in operating revenues or purchased power depending on the forecasted position being economically hedged by the derivative contract. Settlement gains and losses on contracts for natural gas are reflected in fuel expense. Settlement gains and losses on diesel derivatives are recorded in other O&M expense.
Fair Value of Financial Instruments
IDACORP and Idaho Power have categorized their financial instruments into a three-level fair value hierarchy, based on the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure the financial instruments fall within different levels of the hierarchy, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.

Financial assets and liabilities recorded on the condensed consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows:
• Level 1: Financial assets and liabilities whose values are based on unadjusted quoted prices for identical assets or liabilities in an active market that IDACORP and Idaho Power have the ability to access.

•   Level 2: Financial assets and liabilities whose values are based on the following:
a) quoted prices for similar assets or liabilities in active markets;
b) quoted prices for identical or similar assets or liabilities in non-active markets;
c) pricing models whose inputs are observable for substantially the full term of the asset or liability; and
d) pricing models whose inputs are derived principally from or corroborated by observable market data through correlation or other means for substantially the full term of the asset or liability.

IDACORP and Idaho Power Level 2 inputs for derivative instruments are based on quoted market prices adjusted for location using corroborated, observable market data or using quoted price which may be in non-active markets.

•    Level 3: Financial assets and liabilities whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability.
IDACORP’s and Idaho Power’s assessment of a particular input's significance to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy.
Segment Reporting
IDACORP’s only reportable segment is utility operations. The utility operations segment’s primary source of revenue is the regulated operations of Idaho Power. Idaho Power’s regulated operations include the power supply, transmission, distribution, purchase, and sale of electricity. This segment also includes income from IERCo, a wholly-owned subsidiary of Idaho Power that is also subject to regulation and is a one-third owner of BCC, an unconsolidated investment.
 
IDACORP’s other operating segments are below the quantitative and qualitative thresholds for reportable segments and are included in the "All Other" category in the table below. This category consists of IFS’s investments in affordable housing and other real estate tax credit projects, Ida-West’s joint venture investments in small hydropower generation projects, and IDACORP’s holding company expenses.
v3.26.1
INCOME TAXES: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
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 (benefit) (in thousands of dollars): 
 IDACORPIdaho Power
Three months ended
March 31,		Three months ended
March 31,
 2026202520262025
Income tax at statutory rates (federal and state)$17,118 $11,809 $16,922 $11,381 
Excess deferred income tax reversal(1,624)(2,431)(1,624)(2,431)
Other(1)
(8,833)(2,594)(8,095)(2,358)
Income tax expense before ADITC$6,661 $6,784 $7,203 $6,592 
Additional ADITC amortization(6,250)(19,250)(6,250)(19,250)
Income tax expense (benefit)$411 $(12,466)$953 $(12,658)
Effective tax rate0.6 %(26.4)%1.4 %(27.8)%
(1) "Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.
Supplemental Disclosure of Cash Flow Information

Supplemental cash flow information related to cash (refunded) paid for income taxes is presented below (in thousands of dollars):
Three months ended
March 31,
 20262025
IDACORP
Cash (refunded) paid for income taxes$(6,214)$— 
Idaho Power
Cash paid to IDACORP related to income taxes$— $— 
v3.26.1
REVENUES: Electric utility operating revenues (Tables)
 3 Months Ended
Mar. 31, 2026
Revenues [Abstract]  
Electric utility operating revenues [Table Text Block]
The following table provides a summary of electric utility operating revenues for IDACORP and Idaho Power (in thousands of dollars):
Three months ended
March 31,
 20262025
Revenue from contracts with customers$383,615 $411,142 
Alternative revenue programs and other revenues19,147 20,810 
Total electric utility operating revenues$402,762 $431,952 
Disaggregation of Revenue [Table Text Block]
The following table presents revenues from contracts with customers disaggregated by revenue source (in thousands of dollars):
Three months ended
March 31,
 20262025
Retail revenues:
Residential (includes $16,637 and $(2,193), respectively, related to the FCA)(1)
$203,597 $190,705 
Commercial (includes $206 and $(43), respectively, related to the FCA)(1)
96,655 97,852 
Industrial69,603 68,607 
Irrigation1,942 1,113 
Deferred revenue related to HCC relicensing AFUDC(2)
(9,114)(2,064)
Total retail revenues362,683 356,213 
Less: FCA mechanism revenues(1)
(16,843)2,236 
Wholesale energy sales4,812 19,548 
Transmission wheeling-related revenues17,324 19,442 
Energy efficiency program revenues6,171 5,232 
Other revenues from contracts with customers9,468 8,471 
Total revenues from contracts with customers$383,615 $411,142 
(1) The FCA mechanism is an alternative revenue program in the Idaho jurisdiction and does not represent revenue from contracts with customers.
(2) The IPUC allows Idaho Power to recover a portion of the AFUDC on construction work in progress related to the HCC relicensing process in its Idaho jurisdiction, even though the relicensing process is not yet complete and the costs have not been moved to utility plant in service. Effective October 1, 2025, Idaho Power began collecting $38.5 million annually. Prior to October 1, 2025, Idaho Power collected $8.8 million annually. For more information refer to Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2025 Annual Report. Amounts collected in the Idaho jurisdiction are recognized as deferred revenue until the license is issued and the accumulated license costs approved for recovery are placed in service.
Alternative revenue programs and other revenues [Table Text Block]
The table below presents the FCA mechanism revenues and other revenues (in thousands of dollars):
Three months ended
March 31,
 20262025
FCA mechanism revenues$16,843 $(2,236)
Derivative revenues2,304 23,046 
Total alternative revenue programs and other revenues$19,147 $20,810 
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
Receivables and Allowance for Uncollectible Accounts

The following table provides a rollforward of the allowance for uncollectible accounts related to customer receivables (in thousands of dollars):
Three months ended
March 31,
 20262025
Balance at beginning of period$3,788 $5,071 
Additions to the allowance620 1,017 
Write-offs, net of recoveries(304)(606)
Balance at end of period$4,104 $5,482 
Allowance for uncollectible accounts as a percentage of customer receivables4.0 %4.0 %
v3.26.1
COMMON STOCK: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Schedule of Forward Contracts Indexed to Issuer's Equity
At March 31, 2026, IDACORP had the following FSAs outstanding under its ATM offering program (in thousands of dollars, except for shares and forward price amounts):
Maturity DateSharesNet Proceeds AvailableForward Price
March 31, 2027530,000$74,040$139.70
March 31, 2027245,83034,730141.28
March 31, 2027325,56144,995138.21
Total / Weighted Average Forward Price1,101,391$153,765$139.61
Schedule of Forward Contracts Indexed to Issuer's Equity, Settled
During the three months ended March 31, 2026, IDACORP settled the following FSAs under its ATM offering program (in thousands of dollars, except for settlement shares and forward settlement price amounts):
Settlement DateSettlement Shares
Net Cash Proceeds(1)
Forward Settlement Price
March 31, 2026198,086$22,777$114.99
March 31, 2026254,17028,952113.91
Total / Weighted Average Forward Settlement Price452,256$51,729$114.38
(1) Settlement of the FSAs is reflected in IDACORP’s equity.
v3.26.1
EARNINGS PER SHARE: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method
The table below presents the computation of IDACORP’s basic and diluted earnings per share (in thousands of dollars and shares, except for per share amounts).
Three months ended
March 31,
 20262025
Numerator:  
Net income attributable to IDACORP, Inc.$67,981 $59,647 
Denominator:  
Weighted-average common shares outstanding - basic55,023 54,110 
Effect of dilutive securities(1)
1,266 16 
Weighted-average common shares outstanding - diluted56,289 54,126 
Basic earnings per share$1.24 $1.10 
Diluted earnings per share$1.21 $1.10 
(1) Includes the effect of dilutive securities related to FSAs. See Note 6 - "Common Stock" for additional information on IDACORP's FSAs.
v3.26.1
BENEFIT PLANS: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block] The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the three months ended March 31, 2026 and 2025 (in thousands of dollars).
Pension PlanSMSPPostretirement
Benefits		Total
 20262025202620252026202520262025
Service cost$8,307 $7,857 $240 $293 $188 $169 $8,735 $8,319 
Interest cost14,560 13,867 1,430 1,410 744 743 16,734 16,020 
Expected return on plan assets(18,549)(17,235)— — (455)(450)(19,004)(17,685)
Amortization of prior service cost2 2 56 55 275 344 333 401 
Amortization of net loss— — 240 173 (418)(440)(178)(267)
Net periodic benefit cost4,320 4,491 1,966 1,931 334 366 6,620 6,788 
Regulatory deferral of net periodic benefit cost(1)
(4,129)(4,297)— — — — (4,129)(4,297)
Previously deferred pension costs recognized(1)
8,796 8,796 — — — — 8,796 8,796 
Net periodic benefit cost recognized for financial reporting(1)(2)
$8,987 $8,990 $1,966 $1,931 $334 $366 $11,287 $11,287 
(1) Net periodic benefit costs for the pension plan are recognized for financial reporting based upon the authorization of each regulatory jurisdiction in which Idaho Power operates. Under IPUC order, the Idaho portion of net periodic benefit cost is recorded as a regulatory asset and is recognized in the income statement as those costs are recovered through rates.
(2) Of total net periodic benefit cost recognized for financial reporting, $9.7 million and $9.8 million, respectively, were recognized in "Other operations and maintenance" and $1.6 million and $1.5 million, respectively, were recognized in "Other income, net" on the condensed consolidated statements of income of the companies for the three months ended March 31, 2026 and 2025.
v3.26.1
DERIVATIVE FINANCIAL INSTRUMENTS: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Summary of Derivative Instruments [Abstract]  
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance
The table below presents the gains and losses on derivatives not designated as hedging instruments (in thousands of dollars):
Gain/(Loss) on Derivatives Recognized in Income(1)
Location of Realized Gain/(Loss) on Derivatives Recognized in IncomeThree months ended
March 31,
20262025
Financial swapsOperating revenues$871 $46 
Financial swapsPurchased power(2,564)(1,030)
Financial swapsFuel expense(26,512)(12,200)
Forward contractsOperating revenues35 366 
Forward contractsPurchased power(35)(444)
Forward contractsFuel expense(339)(603)
(1) Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
The table below presents the fair values and locations of derivative instruments not designated as hedging instruments recorded on the balance sheets and reconciles the gross amounts of derivatives recognized as assets and as liabilities to the net amounts presented in the balance sheets (in thousands of dollars):
Asset DerivativesLiability Derivatives
 Balance Sheet LocationGross Fair ValueAmounts OffsetNet AssetsGross Fair ValueAmounts OffsetNet Liabilities
March 31, 2026
Current:    
Financial swapsOther current assets$143 $(114)$29 $114 $(114)$— 
Financial swapsOther current liabilities674 (674)— 25,716 (21,153)
(1)
4,563 
Forward contractsOther current liabilities— — — 905 — 905 
Long-term:  
Financial swapsOther assets3,092 (3,092)
(2)
— 2,072 (2,072)— 
Financial swapsOther liabilities216 (216)— 5,977 (216)5,761 
Forward contractsOther liabilities— — — 12,035 — 12,035 
Total $4,125 $(4,096)$29 $46,819 $(23,555)$23,264 
December 31, 2025
Current:  
Financial swapsOther current liabilities$2,535 $(2,535)$— $34,486 $(29,394)
(3)
$5,092 
Forward contractsOther current assets3 — 3 — — — 
Forward contractsOther current liabilities— — — 1,009 — 1,009 
Long-term:   
Financial swapsOther liabilities1,444 (1,444)— 7,479 (4,385)
(4)
3,094 
Forward contractsOther liabilities— — — 10,524 — 10,524 
Total $3,982 $(3,979)$3 $53,498 $(33,779)$19,719 
(1) Current liability derivative amounts offset include $20.5 million of collateral receivable at March 31, 2026.
(2) Long-term asset derivative amounts offset include $1.0 million of collateral payable at March 31, 2026.
(3) Current liability derivative amounts offset include $26.9 million of collateral receivable at December 31, 2025.
(4) Long-term liability derivative amounts offset include $2.9 million of collateral receivable at December 31, 2025.
Schedule of Derivative Instruments
The table below presents the volumes of derivative commodity forward contracts and swaps outstanding (in thousands of units):
March 31,
CommodityUnits20262025
Electricity purchasesMWh628 223 
Electricity salesMWh8 37 
Natural gas purchasesMMBtu132,308 95,363 
v3.26.1
FAIR VALUE MEASUREMENTS: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
The following table presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis (in thousands of dollars):
March 31, 2026December 31, 2025
Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:    
Money market funds and commercial paper
IDACORP(1)
$4,076 $— $— $4,076 $62,012 $— $— $62,012 
Idaho Power256,083 — — 256,083 110,602 — — 110,602 
Derivatives29 — — 29 — 3 — 3 
Equity securities36,861 — — 36,861 38,448 — — 38,448 
IDACORP assets measured at NAV (not subject to hierarchy disclosure)(1)
— — — 5,883 — — — 5,948 
Liabilities:
Derivatives10,324 12,940 — 23,264 8,186 11,533 — 19,719 
(1) Holding company only. Does not include amounts held by Idaho Power.
Fair Value, by Balance Sheet Grouping [Table Text Block]
The table below presents the carrying value and estimated fair value of financial instruments that are not reported at fair value, using available market information and appropriate valuation methodologies (in thousands of dollars).
 March 31, 2026December 31, 2025
 Carrying AmountEstimated Fair ValueCarrying AmountEstimated Fair Value
IDACORP    
Assets:    
Notes receivable(1)
$1,507 $1,507 $1,507 $1,507 
Held-to-maturity securities(1)(2)
34,119 32,315 33,822 32,468 
Liabilities:    
Long-term debt (including current portion)(1)
3,794,116 3,565,887 3,447,338 3,270,200 
Idaho Power    
Assets:
Held-to-maturity securities(1)(2)
$34,119 $32,315 $33,822 $32,468 
Liabilities:    
Long-term debt (including current portion)(1)
3,794,116 3,565,887 3,447,338 3,270,200 
(1) Notes receivable are categorized as Level 3 and held-to-maturity securities and long-term debt are categorized as Level 2 of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements."
(2) All held-to-maturity securities are carried at amortized cost and were in a gross unrealized holding loss position totaling $1.8 million and $1.4 million as of March 31, 2026, and December 31, 2025, respectively. Substantially all of these debt securities mature between 2027 and 2038. Based on ongoing credit evaluations of these holdings, Idaho Power does not expect payment defaults or delinquencies and had not recorded an allowance for credit losses for these securities as of March 31, 2026, and December 31, 2025.
v3.26.1
SEGMENT INFORMATION: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2026
Segment Information [Abstract]  
Schedule of Segment Reporting Information, by Segment
The table below summarizes the segment information for IDACORP’s utility operations and the total of all other segments, and reconciles this information to total enterprise amounts (in thousands of dollars). 
Utility
Operations		All
Other		EliminationsConsolidated
Total
Three months ended March 31, 2026:    
Revenues$402,762 $650 $— $403,412 
Depreciation and amortization65,519 — — 65,519 
Other income (expense), net22,182 (186)— 21,996 
Interest income including carrying charges on regulatory assets7,375 1,865 (569)8,671 
Earnings of unconsolidated equity-method investments831 (85)— 746 
Interest expense44,076 646 (569)44,153 
Income tax expense (benefit) 953 (542)— 411 
Net income attributable to IDACORP, Inc.66,658 1,323 — 67,981 
Expenditures for long-lived assets371,481 46 — 371,527 
Total assets as of March 31, 2026
10,442,621 213,338 (68,179)10,587,780 
Three months ended March 31, 2025:
Revenues$431,952 $505 $— $432,457 
Depreciation and amortization59,785 — — 59,785 
Other income (expense), net17,567 (351)— 17,216 
Interest income including carrying charges on regulatory assets9,040 3,053 (762)11,331 
Earnings of unconsolidated equity-method investments650 67 — 717 
Interest expense36,839 921 (762)36,998 
Income tax (benefit) expense(12,658)192 — (12,466)
Net income attributable to IDACORP, Inc.58,127 1,520 — 59,647 
Expenditures for long-lived assets201,239 85 — 201,324 
v3.26.1
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
 3 Months Ended
Mar. 31, 2026
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The table below presents changes in components of AOCI, net of tax, (in thousands of dollars). Items in parentheses indicate charges to AOCI.
Three months ended
March 31,
20262025
Defined benefit pension items
Balance at beginning of period$(14,944)$(13,592)
Other comprehensive income before reclassification— (229)
Amounts reclassified out of AOCI221 169 
Balance at end of period$(14,723)$(13,652)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified (in thousands of dollars). Items in parentheses indicate increases to net income.
Amount Reclassified from AOCI
Three months ended
March 31,
20262025
Amortization of defined benefit pension items(1)
Prior service cost$56 $55 
Net loss240 173 
Total before tax296 228 
Tax benefit(2)
(75)(59)
Total reclassification for the period, net of tax$221 $169 
(1) Amortization of these items is included in IDACORP's condensed consolidated statements of income in other operating expenses and in Idaho Power's condensed consolidated statements of income in other expense, net.
(2) The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.
v3.26.1
CHANGES IN IDAHO POWER RETAINED EARNINGS (Tables)
 3 Months Ended
Mar. 31, 2026
Changes in Idaho Power Retained Earnings [Abstract]  
Changes in Idaho Power Retained Earnings Table
Three months ended
March 31,
20262025
Balance at beginning of period$2,223,899 $2,096,151 
Net income66,658 58,127 
Dividends to parent(48,860)(46,695)
Balance at end of period$2,241,697 $2,107,583 
v3.26.1
ASSETS HELD FOR SALE (Tables)
 3 Months Ended
Mar. 31, 2026
Discontinued Operations and Disposal Groups [Abstract]  
Disposal Groups, Including Discontinued Operations
The table below summarizes components of assets and liabilities in the disposal group classified as held for sale on the condensed consolidated balance sheets (in thousands of dollars):
March 31, 2026
Assets held for sale:
Current regulatory assets$936 
Utility plant in service160,506 
Accumulated provision for depreciation(48,779)
Construction work in progress1,063 
Regulatory assets10,756 
Total assets held for sale(1)
$124,482 
Liabilities held for sale:
Current regulatory liabilities$297 
Regulatory liabilities8,480 
Total liabilities held for sale(1)
$8,777 
(1) Total assets held for sale and total liabilities held for sale are presented within current assets and current liabilities, respectively, on the condensed consolidated balance sheets as of March 31, 2026, as the sale is expected to be completed within 12 months.
v3.26.1
INCOME TAXES: Level 4 (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Income Tax Expense [Line Items]    
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ 17,118 $ 11,809
Excess deferred income tax reversal (1,624) (2,431)
Other [1] (8,833) (2,594)
Income tax expense before additional ADITC amortization 6,661 6,784
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount (6,250) (19,250)
Income Tax Expense $ 411 $ (12,466)
Effective tax rate 0.60% (26.40%)
Idaho Power Company    
Income Tax Expense [Line Items]    
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ 16,922 $ 11,381
Excess deferred income tax reversal (1,624) (2,431)
Other [1] (8,095) (2,358)
Income tax expense before additional ADITC amortization 7,203 6,592
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount (6,250) (19,250)
Income Tax Expense $ 953 $ (12,658)
Effective tax rate 1.40% (27.80%)
[1] "Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.
Supplemental Disclosure of Cash Flow Information

Supplemental cash flow information related to cash (refunded) paid for income taxes is presented below (in thousands of dollars):
Three months ended
March 31,
 20262025
IDACORP
Cash (refunded) paid for income taxes$(6,214)$— 
Idaho Power
Cash paid to IDACORP related to income taxes$— $— 
v3.26.1
INCOME TAXES: Supplemental Disclosures (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Income Tax Expense [Line Items]    
Cash (refunded) paid for income taxes $ (6,214) $ 0
Idaho Power Company    
Income Tax Expense [Line Items]    
Cash paid to IDACORP related to income taxes $ 0 $ 0
v3.26.1
REGULATORY MATTERS: Level 4 (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2027
May 31, 2027
Jun. 01, 2025
Jun. 01, 2024
Jan. 01, 2024
Settlement Stipulation - Investment Tax Credits and Idaho Sharing Mechanism              
Regulatory Matters              
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount $ 6,300 $ 19,300          
Settlement Stipulation - Investment Tax Credits and Idaho Sharing Mechanism | ADITC              
Regulatory Matters              
Investment Tax Credits, Remains Available $ 159,600            
Idaho fixed cost adjustment mechanism              
Regulatory Matters              
Percentage cap on the FCA adjustment 3.00%            
Annual fixed cost adjustment mechanism deferral         $ (2,000) $ 3,100  
Subsequent Event | Idaho Power Cost Adjustment              
Regulatory Matters              
Public Utilities, Requested Rate Increase (Decrease), Amount       $ (51,600)      
Subsequent Event | Idaho fixed cost adjustment mechanism              
Regulatory Matters              
Public Utilities, Requested Rate Increase (Decrease), Amount       5,100      
Subsequent Event | Oregon jurisdiction              
Regulatory Matters              
Public Utilities, Requested Rate Increase (Decrease), Amount       (1,500)      
Subsequent Event | Oregon Power Cost Adjustment Wildfire              
Regulatory Matters              
Public Utilities, Requested Rate Increase (Decrease), Amount       $ (1,900)      
Subsequent Event | Wildfire mitigation plan costs | Oregon jurisdiction | 2025              
Regulatory Matters              
Public Utilities, Requested Rate Increase (Decrease), Amount     $ 3,100        
IDAHO | 2023 Settlement Stipulation              
Regulatory Matters              
Minimum authorized return on equity             9.12%
IDAHO | October 2025 Settlement Stipulation              
Regulatory Matters              
Annual amortization cap $ 55,000            
IDAHO | Wildfire Mitigation Plan Deferral              
Regulatory Matters              
Regulatory Asset 89,600            
IDAHO | Wildfire Mitigation Plan Deferral | 2025 Rate Case              
Regulatory Matters              
Regulatory Asset 70,900            
Oregon jurisdiction | Wildfire Mitigation Plan Deferral              
Regulatory Matters              
Regulatory Asset 3,400            
Oregon jurisdiction | Wildfire Mitigation Plan Deferral | 2025 Rate Case              
Regulatory Matters              
Regulatory Asset $ 600            
v3.26.1
REVENUES: Electric utility operating revenues (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues [Abstract]    
Revenue from contracts with customers $ 383,615 $ 411,142
Alternative revenue programs and other revenues 19,147 20,810
Electric utility revenues $ 402,762 $ 431,952
v3.26.1
REVENUES: (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 383,615 $ 411,142
Alternative revenue programs and other revenues 19,147 20,810
Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 362,683 356,213
Idaho fixed cost adjustment mechanism    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers [1] (16,843) 2,236
Alternative revenue programs and other revenues 16,843 (2,236)
Wholesale energy sales    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 4,812 19,548
Transmission Service Agreement    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 17,324 19,442
Energy efficiency program revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 6,171 5,232
Other revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 9,468 8,471
Derivative revenues    
Disaggregation of Revenue [Line Items]    
Alternative revenue programs and other revenues 2,304 23,046
Residential Retail Revenue | Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers [1] 203,597 190,705
Residential Retail Revenue | Idaho fixed cost adjustment mechanism    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 16,637 (2,193)
Commercial Retail Revenue | Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers [1] 96,655 97,852
Commercial Retail Revenue | Idaho fixed cost adjustment mechanism    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 206 (43)
Industrial Retail Revenue | Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 69,603 68,607
Irrigation Retail Revenue | Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,942 1,113
Deferred revenue-AFUDC | Retail revenues    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers [2] (9,114) (2,064)
IPUC authorized AFUDC Collection HCC Relicensing - Gross | Idaho Power Company | Hells Canyon Complex    
Disaggregation of Revenue [Line Items]    
Regulatory liabilities $ (38,500) $ (8,800)
[1] The FCA mechanism is an alternative revenue program in the Idaho jurisdiction and does not represent revenue from contracts with customers.
[2] The IPUC allows Idaho Power to recover a portion of the AFUDC on construction work in progress related to the HCC relicensing process in its Idaho jurisdiction, even though the relicensing process is not yet complete and the costs have not been moved to utility plant in service. Effective October 1, 2025, Idaho Power began collecting $38.5 million annually. Prior to October 1, 2025, Idaho Power collected $8.8 million annually. For more information refer to Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2025 Annual Report. Amounts collected in the Idaho jurisdiction are recognized as deferred revenue until the license is issued and the accumulated license costs approved for recovery are placed in service.
v3.26.1
REVENUES: Receivables and Allowance for Uncollectible Accounts (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at beginning of period $ 3,788 $ 5,071
Additions to the allowance 620 1,017
Write-offs, net of recoveries (304) (606)
Balance at end of period $ 4,104 $ 5,482
Allowance for uncollectible accounts as a percentage of customer receivables 4.00% 4.00%
v3.26.1
LONG-TERM DEBT (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
plan
Feb. 17, 2026
USD ($)
Mar. 31, 2025
plan
Mar. 14, 2024
USD ($)
Debt Instrument [Line Items]        
Number of plans | plan 2   2  
First Mortgage Bonds 4.85 Series O Due 2036 [Domain]        
Debt Instrument [Line Items]        
Secured Long-term Debt, Noncurrent   $ 350,000    
Debt Instrument, Interest Rate, Stated Percentage   4.85%    
Idaho Power Company        
Debt Instrument [Line Items]        
Debt instrument interest rate limit 8.00%      
Debt Instrument, Unused Borrowing Capacity, Amount $ 1,700,000      
Indenture, Limit of first mortgate bonds at any one time outstanding 5,500,000      
Idaho Power Company | Principal amount of debt securities in Selling Agreement        
Debt Instrument [Line Items]        
Indenture, Unused Borrowing Capacity, Amount 2,100,000      
Idaho Power Company | Public Utility Commisions - Idaho, Oregon, and Washington        
Debt Instrument [Line Items]        
Indenture, Unused Borrowing Capacity, Amount $ 150,000     $ 1,200,000
v3.26.1
COMMON STOCK: Level 4 (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
shares
Idaho Power Company    
Shareholders' equity    
Proceeds from Contributed Capital | $ $ 90,000  
Ratio of Indebtedness to Net Capital 0.53  
Dividend Distribution Restriction Amount | $ $ 1,300,000  
Dividend Distribution Restriction Threshold 0.35  
Ratio of total Capital to total capital and long-term debt 0.47  
Preferred Stock, Shares Outstanding 0  
IDACORP    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 549,104  
Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements 1,171,000 0
Maximum leverage ratio requirement 0.65  
Ratio of Indebtedness to Net Capital 0.54  
Dividend Distribution Restriction Amount | $ $ 1,400,000  
IDACORP | Performance Shares    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 54,714  
Restricted Stock Unit Awards to Employees 71,855  
IDACORP | Directors    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 31,837  
IDACORP | Dividend Reinvestment and Stock Purchase Plan    
Shareholders' equity    
Stock Issued During Period, Shares, New Issues 10,297  
IDACORP | At-the-Market Offering Program    
Shareholders' equity    
At-the-Market Offering Program, Maximum Value Of Shares To Be Issued | $ $ 300,000  
Common Stock Capital Shares Reserved For Future Issuance, Remaining | $ $ 0  
Registered Public Offering, Initial Common Shares Offered 1,101,391  
Registered Public Offering, Executed Amount | $ $ 155,500  
Registered Public Offering, Commission and Fees Amount | $ $ 1,900  
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 1,101,391  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 153,765  
Forward Sale Price, Price Per Share | $ / shares $ 139.61  
Cash To Deliver To Settle Forward Sales Agreement, Net | $ $ 1,300  
Common Shares To Deliver To Settle Forward Sales Agreement, Net 9,273  
Common Shares Delivered To Settle Forward Sales Agreement, Gross 452,256  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 51,729  
Forward Sale Price, Per Share, Settled | $ / shares $ 114.38  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/27    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 530,000  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 74,040  
Forward Sale Price, Price Per Share | $ / shares $ 139.70  
IDACORP | ATM Forward Sale Agreements Maturity 03/31/27 1    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 245,830  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 34,730  
Forward Sale Price, Price Per Share | $ / shares $ 141.28  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/27 2    
Shareholders' equity    
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 325,561  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 44,995  
Forward Sale Price, Price Per Share | $ / shares $ 138.21  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/26    
Shareholders' equity    
Common Shares Delivered To Settle Forward Sales Agreement, Gross 198,086  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 22,777  
Forward Sale Price, Per Share, Settled | $ / shares $ 114.99  
IDACORP | ATM Forward Sale Agreements Maturity 3/31/26 1    
Shareholders' equity    
Common Shares Delivered To Settle Forward Sales Agreement, Gross 254,170  
Cash Received On Settlement Of Forward Sale Agreement | $ [1] $ 28,952  
Forward Sale Price, Per Share, Settled | $ / shares $ 113.91  
IDACORP | Forward Sale Agreements (2025 Series)    
Shareholders' equity    
Registered Public Offering, Initial Common Shares Offered 4,504,505  
Registered Public Offering, Executed Amount | $ $ 500,000  
Common Shares To Deliver To Settle Forward Sales Agreement, Gross 5,180,180  
Cash To Be Received On Settlement Of Forward Sale Agreement | $ $ 560,300  
Cash To Deliver To Settle Forward Sales Agreement, Net | $ $ 167,900  
Common Shares To Deliver To Settle Forward Sales Agreement, Net 1,194,767  
Registered Public Offering, Price Per Share | $ / shares $ 111.00  
Registered Public Offering, Initial Common Shares Offered, Greenshoe 675,675  
Registered Public Offering, Executed Amount, Greenshoe | $ $ 75,000  
Registered Public Offering, Initial Common Shares Offered, Total 5,180,180  
Initial Forward Sale Price, Per Share | $ / shares $ 107.67  
[1] Settlement of the FSAs is reflected in IDACORP’s equity.
v3.26.1
EARNINGS PER SHARE: Level 4 (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Numerator:    
Net Income Attributable to IDACORP, Inc. $ 67,981 $ 59,647
Denominator:    
Weighted-average common shares outstanding - basic 55,023 54,110
Effect of dilutive securities [1] 1,266 16
Weighted-average common shares outstanding - diluted 56,289 54,126
Earnings attributable to IDACORP, Inc. - basic (in dollars per share) $ 1.24 $ 1.10
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share) $ 1.21 $ 1.10
[1] Includes the effect of dilutive securities related to FSAs. See Note 6 - "Common Stock" for additional information on IDACORP's FSAs.
v3.26.1
COMMITMENTS: Purchase Obligations (Details)
$ in Thousands
May 02, 2030
USD ($)
Long-Term Contract for Purchase of Gas Transportation Capacity | Idaho Power Company | Subsequent Event  
Long-Term Purchase Commitment  
Purchase Obligation $ 1,600,000
v3.26.1
COMMITMENTS: Guarantees (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Idaho Power Company  
Guarantor Obligations  
IERCo guarantee of BCC reclamation obligation $ 49.7
Bridger Coal Company  
Guarantor Obligations  
IERCo guarantee of BCC reclamation obligation $ 149.2
v3.26.1
BENEFIT PLANS: Level 4 (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
USD ($)
plan
Mar. 31, 2025
USD ($)
plan
Defined Benefit Plan Disclosure    
Number of plans | plan 2 2
Service cost $ 8,735 $ 8,319
Interest cost 16,734 16,020
Expected return on plan assets (19,004) (17,685)
Amortization of prior service cost 333 401
Amortization of net loss (178) (267)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 6,620 6,788
Regulatory deferral of net periodic benefit cost [1] (4,129) (4,297)
IPUC Authorized recovered pension cost [1] 8,796 8,796
Net periodic benefit cost recognized for financial reporting [1],[2] 11,287 11,287
Net Periodic Benefit cost recognize in Other operations and maintenance 9,700 9,800
Net Periodic Benefit cost recognized in other expense, net 1,600 1,500
Pension Plan    
Defined Benefit Plan Disclosure    
Service cost 8,307 7,857
Interest cost 14,560 13,867
Expected return on plan assets (18,549) (17,235)
Amortization of prior service cost 2 2
Amortization of net loss 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 4,320 4,491
Regulatory deferral of net periodic benefit cost [1] (4,129) (4,297)
IPUC Authorized recovered pension cost [1] 8,796 8,796
Net periodic benefit cost recognized for financial reporting [1],[2] 8,987 8,990
Pension Plan | Idaho Power Company    
Defined Benefit Plan Disclosure    
Defined Benefit Plan, Contributions by Employer 0  
Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year 30,000  
Senior Management Security Plan    
Defined Benefit Plan Disclosure    
Service cost 240 293
Interest cost 1,430 1,410
Expected return on plan assets 0 0
Amortization of prior service cost 56 55
Amortization of net loss 240 173
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 1,966 1,931
Net periodic benefit cost recognized for financial reporting 1,966 1,931
Postretirement Benefits Plan    
Defined Benefit Plan Disclosure    
Service cost 188 169
Interest cost 744 743
Expected return on plan assets (455) (450)
Amortization of prior service cost 275 344
Amortization of net loss (418) (440)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) 334 366
Net periodic benefit cost recognized for financial reporting $ 334 $ 366
[1] Net periodic benefit costs for the pension plan are recognized for financial reporting based upon the authorization of each regulatory jurisdiction in which Idaho Power operates. Under IPUC order, the Idaho portion of net periodic benefit cost is recorded as a regulatory asset and is recognized in the income statement as those costs are recovered through rates.
[2] Of total net periodic benefit cost recognized for financial reporting, $9.7 million and $9.8 million, respectively, were recognized in "Other operations and maintenance" and $1.6 million and $1.5 million, respectively, were recognized in "Other income, net" on the condensed consolidated statements of income of the companies for the three months ended March 31, 2026 and 2025.
v3.26.1
Derivative Instruments Gains (Loss) on Derivatives Recognized in Income (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financial Swaps | Operating revenues    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] $ 871 $ 46
Financial Swaps | Purchased power    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] (2,564) (1,030)
Financial Swaps | Fuel expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] (26,512) (12,200)
Forward contracts | Operating revenues    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] 35 366
Forward contracts | Purchased power    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] (35) (444)
Forward contracts | Fuel expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net [1] $ (339) $ (603)
[1] Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.
v3.26.1
Derivative Instruments Fair Value and Offsets Table (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 4,125 $ 3,982
Derivative Asset, Fair Value, Gross Liability (4,096) (3,979)
Derivative Asset, Fair Value, Amount Offset Against Collateral 29 3
Derivative Liability, Fair Value, Gross Liability 46,819 53,498
Derivative Liability, Fair Value, Gross Asset (23,555) (33,779)
Derivative Liability, Fair Value, Amount Offset Against Collateral 23,264 19,719
Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset 20,500 26,900
Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Collateral, Obligation to Return Cash, Offset 1,000  
Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset   2,900
Financial Swaps | Other Current Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 143  
Derivative Asset, Fair Value, Gross Liability (114)  
Derivative Asset, Fair Value, Amount Offset Against Collateral 29  
Derivative Liability, Fair Value, Gross Liability 114  
Derivative Liability, Fair Value, Gross Asset (114)  
Derivative Liability, Fair Value, Amount Offset Against Collateral 0  
Financial Swaps | Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 674 2,535
Derivative Asset, Fair Value, Gross Liability (674) (2,535)
Derivative Asset, Fair Value, Amount Offset Against Collateral 0 0
Derivative Liability, Fair Value, Gross Liability 25,716 34,486
Derivative Liability, Fair Value, Gross Asset (21,153) [1] (29,394) [2]
Derivative Liability, Fair Value, Amount Offset Against Collateral 4,563 5,092
Financial Swaps | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 3,092  
Derivative Asset, Fair Value, Gross Liability [3] (3,092)  
Derivative Asset, Fair Value, Amount Offset Against Collateral 0  
Derivative Liability, Fair Value, Gross Liability 2,072  
Derivative Liability, Fair Value, Gross Asset (2,072)  
Derivative Liability, Fair Value, Amount Offset Against Collateral 0  
Financial Swaps | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 216 1,444
Derivative Asset, Fair Value, Gross Liability (216) (1,444)
Derivative Asset, Fair Value, Amount Offset Against Collateral 0 0
Derivative Liability, Fair Value, Gross Liability 5,977 7,479
Derivative Liability, Fair Value, Gross Asset (216) (4,385) [4]
Derivative Liability, Fair Value, Amount Offset Against Collateral 5,761 3,094
Forward contracts | Other Current Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset   3
Derivative Asset, Fair Value, Gross Liability   0
Derivative Asset, Fair Value, Amount Offset Against Collateral   3
Derivative Liability, Fair Value, Gross Liability   0
Derivative Liability, Fair Value, Gross Asset   0
Derivative Liability, Fair Value, Amount Offset Against Collateral   0
Forward contracts | Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 0 0
Derivative Asset, Fair Value, Gross Liability 0 0
Derivative Asset, Fair Value, Amount Offset Against Collateral 0 0
Derivative Liability, Fair Value, Gross Liability 905 1,009
Derivative Liability, Fair Value, Gross Asset 0 0
Derivative Liability, Fair Value, Amount Offset Against Collateral 905 1,009
Forward contracts | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 0 0
Derivative Asset, Fair Value, Gross Liability 0 0
Derivative Asset, Fair Value, Amount Offset Against Collateral 0 0
Derivative Liability, Fair Value, Gross Liability 12,035 10,524
Derivative Liability, Fair Value, Gross Asset 0 0
Derivative Liability, Fair Value, Amount Offset Against Collateral $ 12,035 $ 10,524
[1] Current liability derivative amounts offset include $20.5 million of collateral receivable at March 31, 2026.
[2] Current liability derivative amounts offset include $26.9 million of collateral receivable at December 31, 2025.
[3] Long-term asset derivative amounts offset include $1.0 million of collateral payable at March 31, 2026.
[4] Long-term liability derivative amounts offset include $2.9 million of collateral receivable at December 31, 2025.
v3.26.1
Derivative Commodities and Disclosures (Details)
MWh in Thousands, MMBTU in Thousands
Mar. 31, 2026
MWh
MMBTU
Mar. 31, 2025
MWh
MMBTU
Electricity (MWh) | Long    
Derivative    
Derivative, Number of Instruments Held 628 223
Electricity (MWh) | Short    
Derivative    
Derivative, Number of Instruments Held 8 37
Natural Gas (MMBTU) | Long    
Derivative    
Derivative, Number of Instruments Held | MMBTU 132,308 95,363
v3.26.1
DERIVATIVE FINANCIAL INSTRUMENTS: - Narrative (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives in a net liability position $ 47.5
Collateral Already Posted, Aggregate Fair Value 28.0
Additional Collateral, Aggregate Fair Value $ 26.1
v3.26.1
FAIR VALUE MEASUREMENTS: Level 4 (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] $ 4,076 $ 62,012
Derivative Assets 29 3
Equity Securities, FV-NI 36,861 38,448
Derivative Liabilities 23,264 19,719
Idaho Power Company    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 256,083 110,602
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds [1] 4,076 62,012
Derivative Assets 29 0
Equity Securities, FV-NI 36,861 38,448
Assets, Fair Value Disclosure [1] 0 0
Derivative Liabilities 10,324 8,186
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 256,083 110,602
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 3
Equity Securities, FV-NI 0 0
Assets, Fair Value Disclosure [1] 0 0
Derivative Liabilities 12,940 11,533
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] $ 5,883 $ 5,948
[1] Holding company only. Does not include amounts held by Idaho Power.
v3.26.1
FAIR VALUE MEASUREMENTS: Fair Value, by Balance Sheet Grouping (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Corporate Fixed-Income And Asset-Backed Debt Securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value $ 1,800 $ 1,400
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes Receivable [1] 1,507 1,507
Held-to-maturity securities [1],[2] 34,119 33,822
Long-term debt [1] 3,794,116 3,447,338
Carrying Amount | Idaho Power Company    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity securities [1],[2] 34,119 33,822
Long-term debt [1] 3,794,116 3,447,338
Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes Receivable [1] 1,507 1,507
Held-to-maturity securities [1],[2] 32,315 32,468
Long-term debt [1] 3,565,887 3,270,200
Estimated Fair Value | Idaho Power Company    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Held-to-maturity securities [1],[2] 32,315 32,468
Long-term debt [1] $ 3,565,887 $ 3,270,200
[1]
(1) Notes receivable are categorized as Level 3 and held-to-maturity securities and long-term debt are categorized as Level 2 of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements."
[2]
(2) All held-to-maturity securities are carried at amortized cost and were in a gross unrealized holding loss position totaling $1.8 million and $1.4 million as of March 31, 2026, and December 31, 2025, respectively. Substantially all of these debt securities mature between 2027 and 2038. Based on ongoing credit evaluations of these holdings, Idaho Power does not expect payment defaults or delinquencies and had not recorded an allowance for credit losses for these securities as of March 31, 2026, and December 31, 2025.
v3.26.1
SEGMENT INFORMATION: Level 4 (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information      
Total operating revenues $ 403,412 $ 432,457  
Depreciation 65,519 59,785  
Other income, net 21,996 17,216  
Other Interest and Dividend Income 8,671 11,331  
Earnings of unconsolidated equity-method investments 746 717  
Interest Expense, Operating and Nonoperating 44,153 36,998  
Income Tax Expense (Benefit) 411 (12,466)  
Net Income Attributable to IDACORP, Inc. 67,981 59,647  
Segment, Expenditure, Addition to Long-Lived Assets 371,527 201,324  
Total assets 10,587,780   $ 10,225,437
Eliminations      
Segment Reporting Information      
Total operating revenues 0 0  
Depreciation 0 0  
Other income, net 0 0  
Other Interest and Dividend Income (569) (762)  
Earnings of unconsolidated equity-method investments 0 0  
Interest Expense, Operating and Nonoperating (569) (762)  
Income Tax Expense (Benefit) 0 0  
Net Income Attributable to IDACORP, Inc. 0 0  
Segment, Expenditure, Addition to Long-Lived Assets 0 0  
Total assets (68,179)    
Idaho Power Company | Operating Segments      
Segment Reporting Information      
Total operating revenues 402,762 431,952  
Depreciation 65,519 59,785  
Other income, net 22,182 17,567  
Other Interest and Dividend Income 7,375 9,040  
Earnings of unconsolidated equity-method investments 831 650  
Interest Expense, Operating and Nonoperating 44,076 36,839  
Income Tax Expense (Benefit) 953 (12,658)  
Net Income Attributable to IDACORP, Inc. 66,658 58,127  
Segment, Expenditure, Addition to Long-Lived Assets 371,481 201,239  
Total assets 10,442,621    
Other Operating Segment | Operating Segments      
Segment Reporting Information      
Total operating revenues 650 505  
Depreciation 0 0  
Other income, net (186) (351)  
Other Interest and Dividend Income 1,865 3,053  
Earnings of unconsolidated equity-method investments (85) 67  
Interest Expense, Operating and Nonoperating 646 921  
Income Tax Expense (Benefit) (542) 192  
Net Income Attributable to IDACORP, Inc. 1,323 1,520  
Segment, Expenditure, Addition to Long-Lived Assets 46 $ 85  
Total assets $ 213,338    
v3.26.1
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]    
Balance at beginning of period $ 3,571,874  
Reclassifications 221 $ 169
Total IDACORP, Inc. shareholders’ equity 3,641,844 3,346,340
Balance at end of period 3,641,844 3,346,340
Reclassification out of Accumulated Other Comprehensive Income    
Amortization of prior service cost [1] 56 55
Amortization of net loss [1] 240 173
Total reclassification, before tax - pension and postretirement benefits 296 228
Tax benefit [2] (75) (59)
Reclassifications 221 169
Accumulated Defined Benefit Pension Items    
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]    
Balance at beginning of period (14,944) (13,592)
Other Comprehensive Income (Loss) before Reclassifications, Tax 0 229
Reclassifications 221 169
Total IDACORP, Inc. shareholders’ equity (14,723) (13,652)
Balance at end of period (14,723) (13,652)
Reclassification out of Accumulated Other Comprehensive Income    
Reclassifications $ 221 $ 169
[1] Amortization of these items is included in IDACORP's condensed consolidated statements of income in other operating expenses and in Idaho Power's condensed consolidated statements of income in other expense, net.
[2] The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.
v3.26.1
CHANGES IN IDAHO POWER RETAINED EARNINGS (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Retained Earnings Roll Forward [Roll Forward]    
Balance at beginning of period $ 2,284,911  
Net Income Attributable to IDACORP, Inc. 67,981 $ 59,647
Balance at end of period 2,304,032  
Idaho Power Company    
Retained Earnings Roll Forward [Roll Forward]    
Balance at beginning of period 2,223,899 2,096,151
Net Income Attributable to IDACORP, Inc. 66,658 58,127
Dividends (48,860) (46,695)
Balance at end of period $ 2,241,697 $ 2,107,583
v3.26.1
ASSETS HELD FOR SALE (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 30, 2027
Assets Held for Sale Disclosure [Line Items]    
Impairment of Long-Lived Assets to be Disposed of $ 0  
Forecast | Oregon jurisdiction    
Assets Held for Sale Disclosure [Line Items]    
Consideration   $ 154,000
Idaho Power Company | Assets Held for Sale [Table]    
Assets Held for Sale Disclosure [Line Items]    
Current regulatory assets 936  
Utility plant in service 160,506  
Accumulated provision for depreciation (48,779)  
Construction work in progress 1,063  
Regulatory assets 10,756  
Total assets held for sale [1] 124,482  
Current regulatory liabilities 297  
Regulatory liabilities 8,480  
Total liabilities held for sale [1] $ 8,777  
[1] Total assets held for sale and total liabilities held for sale are presented within current assets and current liabilities, respectively, on the condensed consolidated balance sheets as of March 31, 2026, as the sale is expected to be completed within 12 months.