SHARE-BASED COMPENSATION Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details) - $ / shares	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Shares granted (in shares)	75,295	73,131	76,147
Restricted stock plan \| IDACORP
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested shares, beginning (in shares)	188,468
Shares granted (in shares)	94,580
Shares forfeited (in shares)	(2,604)
Shares vested (in shares)	(70,344)
Nonvested shares, ending (in shares)	210,100	188,468
Nonvested shares, period start - weighted average grant-date fair value (in dollars per share)	$ 99.92
Shares granted - weighted average grant-date fair value (in dollars per share)	103.98
Shares forfeited - weighted average grant-date fair value (in dollars per share)	99.37
Shares vested - weighted average grant-date fair value (in dollars per share)	113.07
Nonvested shares, period end - weighted average grant-date fair value (in dollars per share)	$ 97.35	$ 99.92
Restricted stock plan \| Idaho Power Company
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested shares, beginning (in shares)	187,816
Shares granted (in shares)	94,118
Shares forfeited (in shares)	(2,604)
Shares vested (in shares)	(70,106)
Nonvested shares, ending (in shares)	209,224	187,816
Nonvested shares, period start - weighted average grant-date fair value (in dollars per share)	$ 99.91
Shares granted - weighted average grant-date fair value (in dollars per share)	103.98
Shares forfeited - weighted average grant-date fair value (in dollars per share)	99.37
Shares vested - weighted average grant-date fair value (in dollars per share)	113.07
Nonvested shares, period end - weighted average grant-date fair value (in dollars per share)	$ 97.34	$ 99.91

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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