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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Summary of Significant Accounting Policies Level 4 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Significant Accounting Policies
Maturity period of short-term investments	90 days
Impairment of Receivables	$ 0	$ 0
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.20%	3.10%	2.90%
Impairment of Long-Lived Assets Held-for-use	$ 0	$ 0	$ 0
Public Utilities, Allowance for Funds Used During Construction, Rate	7.20%	7.20%	7.40%
Period of Time After Which Unpaid Accounts Are Deemed Late	30 days
Utility plant in service - net	$ 5,649,641	$ 5,243,057
Investments	$ 155,002	$ 161,340
IDAHO
Significant Accounting Policies
Late Payment Fee Customer Billings	1.00%
OREGON
Significant Accounting Policies
Late Payment Fee Customer Billings	2.40%
Marysville Hydro Partners
Significant Accounting Policies
Variable Interest Entity Ownership Percentage of Partner	50.00%
Utility plant in service - net	$ 14,200
Ida-West Energy
Significant Accounting Policies
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Bridger Coal Company
Significant Accounting Policies
IERCo guarantee of BCC reclamation obligation	$ 150,200
Investments	16,800
Idaho Power Company
Significant Accounting Policies
IERCo guarantee of BCC reclamation obligation	$ 50,100
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.18%	3.06%
Utility plant in service - net	$ 5,649,641	$ 5,243,057
Investments	$ 89,103	$ 92,921
IDACORP Financial Services Limited Partnership Interests
Significant Accounting Policies
Variable interest entities ownership percentage minimum	7.00%
Variable interest entities ownership percentage maximum	100.00%
IDACORP Financial Services Limited Partnership Interests | Variable Interest Entity, Primary Beneficiary [Member]
Significant Accounting Policies
Net Assets	$ 50,400

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