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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 %