IDACORP (IDA) 10-Q2 May 242024 Q1 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2024	Apr. 26, 2024
Document Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
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		50,694,665
Entity Central Index Key	0001057877
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Information, Former Legal or Registered Name	None
Idaho Power Company
Document Information
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		39,150,812
Entity Central Index Key	0000049648
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Statements of Inco

Consolidated Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Revenues:
Electric utility revenues	$ 448,299	$ 429,338
Other	637	321
Total operating revenues	448,936	429,659
Operating Expenses:
Purchased power	111,899	171,093
Fuel expense	92,241	89,080
Power cost adjustment	22,363	(51,337)
Other operations and maintenance	105,829	92,041
Energy efficiency programs	4,291	5,215
Depreciation	54,013	45,391
Other electric utility operating expenses	8,008	9,028
Total electric utility operating expenses	398,644	360,511
Other	696	1,045
Total operating expenses	399,340	361,556
Operating Income	49,596	68,103
Nonoperating (Income) Expense:
Allowance for equity funds used during construction	(11,152)	(9,908)
Earnings of unconsolidated equity-method investments	(625)	(2,454)
Interest on long-term debt	33,308	24,968
Other interest	5,467	4,755
Allowance for borrowed funds used during construction	(5,959)	(4,228)
Other income, net	(14,165)	(8,149)
Total nonoperating expense, net	6,874	4,984
Income Before Income Taxes	42,722	63,119
Income Tax (Benefit) Expense	(5,546)	7,095
Net Income	48,268	56,024
Adjustment for (income) loss attributable to noncontrolling interests	(95)	74
Net Income Attributable to IDACORP, Inc.	$ 48,173	$ 56,098
Weighted-average common shares outstanding - basic (in shares)	50,764	50,688
Weighted-average common shares outstanding - diluted (in shares)	50,792	50,723
Earnings Per Share of Common Stock:
Earnings attributable to IDACORP, Inc. - basic (in dollars per share)	$ 0.95	$ 1.11
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share)	$ 0.95	$ 1.11

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 48,268	$ 56,024
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax of $99, and $51, respectively	284	146
Total Comprehensive Income	48,552	56,170
(Income) loss attributable to noncontrolling interests	(95)	74
Comprehensive Income Attributable to IDACORP, Inc.	$ 48,457	$ 56,244

Consolidated Balance Sheets Sta

Consolidated Balance Sheets Statement - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 157,583	$ 327,429
Receivables:
Customer	116,033	107,256
Other	33,022	44,661
Income taxes receivable	11,077	24,574
Accrued unbilled revenues	81,852	90,521
Materials and supplies (at average cost)	156,317	140,515
Fuel stock (at average cost)	23,957	19,952
Prepayments	20,686	22,840
Current regulatory assets	179,727	226,235
Other	27	71
Total current assets	780,281	1,004,054
Investments	156,301	163,971
Property, Plant and Equipment:
Utility plant in service	7,351,549	7,291,532
Accumulated provision for depreciation	(2,613,507)	(2,557,744)
Utility plant in service - net	4,738,042	4,733,788
Construction work in progress	1,082,560	985,502
Utility plant held for future use	9,425	9,511
Other property, net of accumulated depreciation	16,306	16,429
Property, plant and equipment - net	5,846,333	5,745,230
Other Assets:
Company-owned life insurance	84,083	82,038
Regulatory assets	1,427,398	1,426,815
Other	53,015	53,810
Total other assets	1,564,496	1,562,663
Total assets	8,347,411	8,475,918
Current Liabilities:
Accounts payable	199,709	308,504
Taxes accrued	13,002	6,854
Interest accrued	32,069	38,292
Accrued compensation	44,378	64,645
Current regulatory liabilities	7,236	7,952
Advances from customers	105,611	104,297
Other	53,571	53,732
Total current liabilities	505,376	634,076
Other Liabilities:
Deferred Income Tax	874,723	882,724
Regulatory liabilities	869,404	874,601
Pension and other postretirement benefits	238,681	233,965
Other	160,854	160,019
Total other liabilities	2,143,662	2,151,309
Long-Term Debt	2,775,959	2,775,790
Commitments and Contingencies
Equity:
Common stock	890,042	888,615
Retained earnings	2,042,003	2,036,138
Accumulated other comprehensive loss	(16,900)	(17,184)
Total IDACORP, Inc. shareholders’ equity	2,915,145	2,907,569
Noncontrolling interests	7,269	7,174
Total equity	2,922,414	2,914,743
Total	$ 8,347,411	$ 8,475,918

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities:
Net income	$ 48,268	$ 56,024
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	55,174	46,409
Deferred income taxes and investment tax credits	(18,776)	(7,854)
Changes in regulatory assets and liabilities	32,930	(56,396)
Pension and postretirement benefit plan expense	11,350	6,885
Contributions to pension and postretirement benefit plans	(1,176)	(1,308)
Earnings of unconsolidated equity-method investments	(625)	(2,454)
Distributions from equity-method investments	6,250	400
Allowance for equity funds used during construction	(11,152)	(9,908)
Other non-cash adjustments to net income, net	2,670	2,492
Change in:
Accounts receivable	33,251	(10,750)
Prepayments	1,796	4,363
Materials, supplies, and fuel stock	(19,807)	(13,531)
Accounts and wages payable	(62,201)	(112,468)
Taxes accrued/receivable	19,645	22,968
Other assets and liabilities	12,088	(15,271)
Net cash provided by (used in) operating activities	109,685	(90,399)
Investing Activities:
Additions to utility plant, net	(259,978)	(118,375)
Payments received from transmission project joint funding partners	20,375	3,123
Other	4,940	6,096
Net cash used in investing activities	(234,663)	(109,156)
Financing Activities:
Issuance of long-term debt	0	522,000
Discount on issuance of long-term debt	0	(3,772)
Retirement of long-term debt	0	100,000
Dividends on common stock	(42,742)	(40,502)
Proceeds from Issuance of Common Stock	1,612	0
Tax withholdings on net settlements of share-based awards	3,694	3,255
Other	(44)	5,330
Net cash (used in) provided by financing activities	(44,868)	379,801
Net (decrease) increase in cash and cash equivalents	(169,846)	180,246
Cash and cash equivalents at beginning of the period	327,429	177,577
Cash and cash equivalents at end of the period	157,583	357,823
Supplemental Disclosure of Cash Flow Information:
Interest (net of amount capitalized)	37,770	27,276
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 111,958	$ 85,858

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2022		$ 882,189	$ 1,937,972	$ (12,922)	$ 7,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues		0
Share-based compensation expense		3,137
Tax withholdings on net settlements of share-based awards		(3,255)
Other		33
Retained Earnings
Net Income Attributable to IDACORP, Inc.	$ 56,098		56,098
Common stock dividends			(40,343)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	146			146
Noncontrolling Interest [Abstract]
Net income (loss) attributable to noncontrolling interests	(74)				74
Ending balance at Mar. 31, 2023		882,104	1,953,727	(12,776)	7,302
Accumulated Other Comprehensive (Loss) Income
Total IDACORP, Inc. shareholders’ equity			2,830,357	2,823,055
Total IDACORP, Inc. shareholders’ equity	2,907,569
Beginning balance at Dec. 31, 2023	2,914,743	888,615	2,036,138	(17,184)	7,174
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues		1,612
Share-based compensation expense		3,474
Tax withholdings on net settlements of share-based awards		(3,694)
Other		35
Retained Earnings
Net Income Attributable to IDACORP, Inc.	48,173		48,173
Common stock dividends			(42,308)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	284			284
Noncontrolling Interest [Abstract]
Net income (loss) attributable to noncontrolling interests	95				(95)
Ending balance at Mar. 31, 2024	2,922,414	$ 890,042	2,042,003	(16,900)	$ 7,269
Accumulated Other Comprehensive (Loss) Income
Total IDACORP, Inc. shareholders’ equity	$ 2,915,145		$ 2,922,414	$ 2,915,145

Idaho Power Company Consolidate

Idaho Power Company Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Regulated Operating Revenue
Electric utility revenues	$ 448,299	$ 429,338
Operating Expenses [Abstract]
Purchased power	111,899	171,093
Fuel expense	92,241	89,080
Power cost adjustment	22,363	(51,337)
Other operations and maintenance	105,829	92,041
Energy efficiency programs	4,291	5,215
Depreciation	54,013	45,391
Other electric utility operating expenses	8,008	9,028
Total electric utility operating expenses	398,644	360,511
Operating Income	49,596	68,103
Nonoperating (Income) Expense:
Allowance for equity funds used during construction	(11,152)	(9,908)
Earnings of unconsolidated equity-method investments	(625)	(2,454)
Interest on long-term debt	33,308	24,968
Other interest	5,467	4,755
Allowance for borrowed funds used during construction	(5,959)	(4,228)
Other income, net	(14,165)	(8,149)
Total nonoperating expense, net	6,874	4,984
Income Before Income Taxes	42,722	63,119
Income Tax (Benefit) Expense	(5,546)	7,095
Net Income	48,268	56,024
Idaho Power Company
Regulated Operating Revenue
Electric utility revenues	448,299	429,338
Operating Expenses [Abstract]
Purchased power	111,899	171,093
Fuel expense	92,241	89,080
Power cost adjustment	22,363	(51,337)
Other operations and maintenance	105,829	92,041
Energy efficiency programs	4,291	5,215
Depreciation	54,013	45,391
Other electric utility operating expenses	8,008	9,028
Total electric utility operating expenses	398,644	360,511
Operating Income	49,655	68,827
Nonoperating (Income) Expense:
Allowance for equity funds used during construction	(11,152)	(9,908)
Earnings of unconsolidated equity-method investments	(617)	(2,472)
Interest on long-term debt	33,308	24,968
Other interest	5,384	4,674
Allowance for borrowed funds used during construction	(5,959)	(4,228)
Other income, net	(13,580)	(7,527)
Total nonoperating expense, net	7,384	5,507
Income Before Income Taxes	42,271	63,320
Income Tax (Benefit) Expense	(5,031)	7,610
Net Income	$ 47,302	$ 55,710

Idaho Power Company Consolida_2

Idaho Power Company Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 48,268	$ 56,024
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax of $99, and $51, respectively	284	146
Total Comprehensive Income	48,552	56,170
Idaho Power Company
Net income	47,302	55,710
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax of $99, and $51, respectively	284	146
Total Comprehensive Income	$ 47,586	$ 55,856

Idaho Power Company Consolida_3

Idaho Power Company Consolidated Balance Sheet - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 157,583	$ 327,429
Receivables [Abstract]
Customer	116,033	107,256
Other	33,022	44,661
Income taxes receivable	11,077	24,574
Accrued unbilled revenues	81,852	90,521
Materials and supplies (at average cost)	156,317	140,515
Fuel stock (at average cost)	23,957	19,952
Prepayments	20,686	22,840
Current regulatory assets	179,727	226,235
Other	27	71
Total current assets	780,281	1,004,054
Investments	156,301	163,971
Property, Plant and Equipment [Abstract]
Utility plant in service	7,351,549	7,291,532
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(2,613,507)	(2,557,744)
Utility plant in service - net	4,738,042	4,733,788
Construction work in progress	1,082,560	985,502
Utility plant held for future use	9,425	9,511
Other property, net of accumulated depreciation	16,306	16,429
Property, plant and equipment - net	5,846,333	5,745,230
Other Assets:
Company-owned life insurance	84,083	82,038
Regulatory assets	1,427,398	1,426,815
Other	53,015	53,810
Total other assets	1,564,496	1,562,663
Total assets	8,347,411	8,475,918
Current Liabilities:
Current maturities of long-term debt	49,800	49,800
Accounts payable	199,709	308,504
Taxes accrued	13,002	6,854
Interest accrued	32,069	38,292
Accrued compensation	44,378	64,645
Current regulatory liabilities	7,236	7,952
Advances from customers	105,611	104,297
Other	53,571	53,732
Total current liabilities	505,376	634,076
Other Liabilities [Abstract]
Deferred Income Tax	874,723	882,724
Regulatory liabilities	869,404	874,601
Pension and other postretirement benefits	238,681	233,965
Other	160,854	160,019
Total other liabilities	2,143,662	2,151,309
Long-Term Debt	2,775,959	2,775,790
Commitments and Contingencies
Equity [Abstract]
Common stock	890,042	888,615
Retained earnings	2,042,003	2,036,138
Accumulated other comprehensive loss	(16,900)	(17,184)
Total equity	2,922,414	2,914,743
Total	8,347,411	8,475,918
Idaho Power Company
Current Assets:
Cash and cash equivalents	102,505	271,791
Receivables [Abstract]
Customer	116,033	107,256
Other	32,583	44,335
Income taxes receivable	0	22,926
Accrued unbilled revenues	81,852	90,521
Materials and supplies (at average cost)	156,317	140,515
Fuel stock (at average cost)	23,957	19,952
Prepayments	20,528	22,710
Current regulatory assets	179,727	226,235
Other	27	71
Total current assets	713,529	946,312
Investments	87,073	93,037
Property, Plant and Equipment [Abstract]
Utility plant in service	7,351,549	7,291,532
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(2,613,507)	(2,557,744)
Utility plant in service - net	4,738,042	4,733,788
Construction work in progress	1,082,560	985,502
Utility plant held for future use	9,425	9,511
Other property, net of accumulated depreciation	4,308	4,310
Property, plant and equipment - net	5,834,335	5,733,111
Other Assets:
Company-owned life insurance	84,083	82,038
Regulatory assets	1,427,398	1,426,815
Other	41,461	42,218
Total other assets	1,552,942	1,551,071
Total assets	8,187,879	8,323,531
Current Liabilities:
Current maturities of long-term debt	49,800	49,800
Accounts payable	198,710	307,538
Taxes accrued	20,412	6,834
Interest accrued	32,069	38,292
Accrued compensation	44,222	64,408
Current regulatory liabilities	7,236	7,952
Advances from customers	105,611	104,297
Other	40,266	44,907
Total current liabilities	501,774	640,484
Other Liabilities [Abstract]
Deferred Income Tax	872,864	881,050
Regulatory liabilities	869,404	874,601
Pension and other postretirement benefits	238,681	233,965
Other	141,746	135,468
Total other liabilities	2,122,695	2,125,084
Long-Term Debt	2,775,959	2,775,790
Commitments and Contingencies
Equity [Abstract]
Common stock	97,877	97,877
Premium on capital stock	712,258	712,258
Capital stock issuance costs	(2,097)	(2,097)
Retained earnings	1,996,313	1,991,319
Accumulated other comprehensive loss	(16,900)	(17,184)
Total equity	2,787,451	2,782,173
Total	8,187,879	8,323,531
Idaho Power Company \| Related Party
Current Liabilities:
Accounts Payable, Other	$ 3,448	$ 16,456

Idaho Power Company Consolida_4

Idaho Power Company Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 48,268	$ 56,024
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	55,174	46,409
Deferred income taxes and investment tax credits	(18,776)	(7,854)
Changes in regulatory assets and liabilities	32,930	(56,396)
Pension and postretirement benefit plan expense	11,350	6,885
Contributions to pension and postretirement benefit plans	(1,176)	(1,308)
Earnings of unconsolidated equity-method investments	(625)	(2,454)
Distributions from equity-method investments	6,250	400
Allowance for equity funds used during construction	(11,152)	(9,908)
Other non-cash adjustments to net income, net	2,670	2,492
Change in:
Accounts receivable and unbilled revenues	33,251	(10,750)
Prepayments	1,796	4,363
Materials, supplies, and fuel stock	(19,807)	(13,531)
Accounts and wages payable	(62,201)	(112,468)
Taxes accrued/receivable	19,645	22,968
Other assets and liabilities	12,088	(15,271)
Net cash provided by (used in) operating activities	109,685	(90,399)
Investing Activities:
Additions to utility plant, net	(259,978)	(118,375)
Payments received from transmission project joint funding partners	20,375	3,123
Other	4,940	6,096
Net cash used in investing activities	(234,663)	(109,156)
Financing Activities:
Issuance of long-term debt	0	522,000
Discount on issuance of long-term debt	0	(3,772)
Retirement of long-term debt	0	100,000
Dividends on common stock	(42,742)	(40,502)
Other	(44)	5,330
Net cash (used in) provided by financing activities	(44,868)	379,801
Net (decrease) increase in cash and cash equivalents	(169,846)	180,246
Cash and cash equivalents at beginning of the period	327,429	177,577
Cash and cash equivalents at end of the period	157,583	357,823
Supplemental Disclosure of Cash Flow Information:
Interest (net of amount capitalized)	37,770	27,276
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	111,958	85,858
Idaho Power Company
Net income	47,302	55,710
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	55,022	46,262
Deferred income taxes and investment tax credits	(20,610)	(9,395)
Changes in regulatory assets and liabilities	32,930	(56,396)
Pension and postretirement benefit plan expense	11,350	6,885
Contributions to pension and postretirement benefit plans	(1,176)	(1,308)
Earnings of unconsolidated equity-method investments	(617)	(2,472)
Distributions from equity-method investments	6,250	400
Allowance for equity funds used during construction	(11,152)	(9,908)
Other non-cash adjustments to net income, net	(867)	(644)
Change in:
Accounts receivable and unbilled revenues	34,428	(10,196)
Prepayments	1,824	4,383
Materials, supplies, and fuel stock	(19,807)	(13,531)
Accounts and wages payable	(62,227)	(112,502)
Taxes accrued/receivable	22,392	24,664
Other assets and liabilities	12,247	(15,124)
Net cash provided by (used in) operating activities	107,289	(93,172)
Investing Activities:
Additions to utility plant, net	(259,972)	(118,375)
Payments received from transmission project joint funding partners	20,375	3,123
Other	5,799	6,388
Net cash used in investing activities	(233,798)	(108,864)
Financing Activities:
Issuance of long-term debt	0	522,000
Discount on issuance of long-term debt	0	(3,772)
Retirement of long-term debt	0	100,000
Dividends on common stock	(42,777)	(552)
Other	0	5,365
Net cash (used in) provided by financing activities	(42,777)	423,041
Net (decrease) increase in cash and cash equivalents	(169,286)	221,005
Cash and cash equivalents at beginning of the period	271,791	108,933
Cash and cash equivalents at end of the period	102,505	329,938
Supplemental Disclosure of Cash Flow Information:
Interest (net of amount capitalized)	37,687	27,195
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 111,958	$ 85,858

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Unfunded pension liability adjustment, tax	$ 99	$ 51

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 4,628	$ 4,869
Allowance for Doubtful Other Receivables, Current	$ 621	$ 716
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,694,000	50,615,000

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Common stock dividends, per share (in dollar per share)	$ 0.83	$ 0.79

Idaho Power Company Statement o

Idaho Power Company Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unfunded pension liability adjustment, tax	$ (99)	$ (51)
Idaho Power Company
Unfunded pension liability adjustment, tax	$ (99)	$ (51)

Idaho Power company Consolida_5

Idaho Power company Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Current	$ 4,628	$ 4,869
Allowance for Doubtful Other Receivables, Current	$ 621	$ 716
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,694,000	50,615,000
Idaho Power Company
Accounts Receivable, Allowance for Credit Loss, Current	$ 4,628	$ 4,869
Allowance for Doubtful Other Receivables, Current	$ 621	$ 716
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

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:	Mar. 31, 2024
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. 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 wholly-owned subsidiaries include IFS, an investor in affordable housing and other real estate tax credit investments, and Ida-West, an operator of small hydropower generation projects that satisfy the requirements of the PURPA. 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, 2024, condensed consolidated statements of income for the three months ended March 31, 2024 and 2023, and condensed consolidated cash flows for the three months ended March 31, 2024 and 2023. 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 2023 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 revenues, and bad debt. 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. Recent Accounting Pronouncements Not Yet Adopted In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. This ASU is effective for annual periods beginning after December 15, 2023, and for interim periods beginning after December 15, 2024, with early adoption permitted. The amendments in this ASU will be applied retrospectively. IDACORP and Idaho Power are currently evaluating the impact that adoption of this ASU will have on the notes to their respective financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures which expands the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendments in this ASU are required to be applied prospectively and are allowed to be applied retrospectively. IDACORP and Idaho Power are currently evaluating the impact that adoption of this ASU will have on the notes to their respective financial statements. There have been no other recent 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 TAXES_

INCOME TAXES:	3 Months Ended
INCOME TAXES:	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands): IDACORP Idaho Power 2024 2023 2024 2023 Income tax at statutory rates (federal and state) $ 10,972 $ 16,266 $ 10,880 $ 16,299 Excess deferred income tax reversal (2,512) (2,671) (2,512) (2,671) Other (1) (1,506) (2,750) (899) (2,268) Income tax expense before additional ADITC amortization $ 6,954 $ 10,845 $ 7,469 $ 11,360 Additional ADITC amortization (12,500) (3,750) (12,500) (3,750) Income tax (benefit) expense $ (5,546) $ 7,095 $ (5,031) $ 7,610 Effective tax rate (13.0) % 11.2 % (11.9) % 12.0 %

REGULATORY MATTERS_

REGULATORY MATTERS:	3 Months Ended
REGULATORY MATTERS:	Mar. 31, 2024
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 General 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 2023 Annual Report. In March 2024, Idaho Power provided notice to the IPUC of its intent to file a limited issue rate case in Idaho on or after May 31, 2024. In December 2023, Idaho Power filed a general rate case with the OPUC. The filing was based on a 2024 test year and requested an overall annual rate increase of $10.7 million, or 19.28 percent. The filing requested, among other items, a 10.4 percent authorized rate of return on equity and an approximate $188.9 million Oregon-jurisdiction retail rate base. The $188.9 million of rate base excludes rate base associated with Idaho Power's jointly-owned North Valmy coal facilities, the costs of which are recovered under a separate rate mechanism. In its application, Idaho Power proposed a capitalization structure of 49 percent long-term debt and 51 percent common stock equity. Idaho Power included an average cost of debt of 5.104 percent and an overall cost of capital of 7.807 percent. Idaho Power has reached a settlement in principle for the general rate case with the OPUC staff and other stakeholders. The settlement is not final and remains subject to completion of the related settlement stipulation, as well as approval by the OPUC. As of the date of this report, Idaho Power is unable to predict the outcome of the general rate case. If approved by the OPUC, new rates for Oregon-jurisdiction customers would become effective in October 2024 or later. Idaho ADITC and Revenue Sharing Mechanism A May 2018 Idaho settlement stipulation related to tax reform (2018 Settlement Stipulation) and the 2023 Settlement Stipulation are each described in Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2023 Annual Report. The 2023 Settlement Stipulation modifies the 2018 Settlement Stipulation in part. The 2023 Settlement Stipulation includes provisions for the accelerated amortization of ADITC to help achieve a minimum 9.12 percent Idaho ROE. The settlement stipulations also provide for the potential sharing between Idaho Power and Idaho customers of Idaho-jurisdictional earnings in excess of a 9.6 percent Idaho ROE. In addition, the 2023 Settlement Stipulation included modifications to Idaho Power’s ADITC and revenue sharing mechanism beginning in 2024 to (1) include an additional amount of investment tax credits equal to the incremental investment tax credits generated from Idaho Power’s investment in 2023 battery storage projects; (2) remove the existing $25 million annual cap on the amount of accelerated amortization of ADITCs; and (3) implement all revenue sharing through the PCA rather than using a portion of revenue sharing to offset customer-funded pension obligations. Based on its estimate of full-year 2024 Idaho ROE, in the first quarter of 2024, Idaho Power recorded $12.5 million in additional ADITC amortization under the 2023 Settlement Stipulation. Accordingly, at March 31, 2024, $73.5 million of additional ADITC remained available for future use. Idaho Power recorded $3.75 million of additional ADITC amortization during the first quarter of 2023, based on its then-current estimate of full-year 2023 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 credit on the balance sheet for future recovery or refund. The power supply costs deferred primarily result from changes in contracted power purchase prices and volumes, changes in wholesale market prices and transaction volumes, fuel prices, and the levels of Idaho Power's own generation. In April 2024, Idaho Power and parties entered into a settlement stipulation for its annual power cost update (APCU) in Oregon. The APCU includes both an October update and a March forecast. Once approved by the OPUC, the results of the October update are reflected as an update to base rates and the results of the March forecast are reflected as an update to APCU rates. If approved, the proposed settlement will result in an overall rate decrease of $6.9 million effective June 1, 2024. As of the date of this report, the OPUC has not issued an order on the proposed settlement stipulation. In April 2024, Idaho Power filed an application with the IPUC requesting a $35.7 million net decrease in PCA revenues, effective for the 2024-2025 PCA collection period from June 1, 2024, to May 31, 2025. The net decrease in PCA revenues reflects forecasted improved hydropower generation during the April 2024-March 2025 PCA deferral period. As of the date of this report, the IPUC has not yet issued an order on the company's requested rate decrease. 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, Idaho Power recovers a portion of fixed costs through 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 2024, Idaho Power filed its annual FCA update with the IPUC, requesting approval to recover its 2023 FCA balance of $36.8 million, an $11.7 million increase over the 2022 FCA balance of $25.1 million, over the period from June 1, 2024, to May 31, 2025. As of the d ate of this report, the IPUC has not yet issued an order on the company's requested rate increase.

REVENUES_

REVENUES:	3 Months Ended
REVENUES:	Mar. 31, 2024
Revenues [Abstract]
REVENUES:	REVENUES The following table provides a summary of electric utility operating revenues for IDACORP and Idaho Power for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Revenue from contracts with customers $ 417,897 $ 385,666 Alternative revenue programs and other revenues 30,402 43,672 Total electric utility operating revenues $ 448,299 $ 429,338 Revenues from Contracts with Customers The following table presents revenues from contracts with customers disaggregated by revenue source for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Retail revenues: Residential (includes $(687) and $8,909, respectively, related to the FCA) (1) $ 184,300 $ 188,536 Commercial (includes $(53) and $276, respectively, related to the FCA) (1) 94,697 87,830 Industrial 65,206 55,544 Irrigation 1,038 933 Deferred revenue related to HCC relicensing AFUDC (2) (2,084) (2,119) Total retail revenues 343,157 330,724 Less: FCA mechanism revenues (1) 740 (9,185) Wholesale energy sales 38,069 30,195 Transmission wheeling-related revenues 24,162 21,585 Energy efficiency program revenues 4,291 5,215 Other revenues from contracts with customers 7,478 7,132 Total revenues from contracts with customers $ 417,897 $ 385,666 (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, even though the relicensing process is not yet complete and the costs have not been moved to electric plant in service. Idaho Power is collecting $8.8 million annually in the Idaho jurisdiction but is deferring revenue recognition of the amounts collected 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 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. For each forward sale, Idaho Power simultaneously enters into a matching forward purchase 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 for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 FCA mechanism revenues $ (740) 9,185 Derivative revenues 31,142 34,487 Total alternative revenue programs and other revenues $ 30,402 $ 43,672 Receivables and Allowance for Uncollectible Accounts The following table provides a rollforward of the allowance for uncollectible accounts related to customer receivables for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Balance at beginning of period $ 4,869 $ 5,034 Additions to the allowance 267 577 Write-offs, net of recoveries (508) (549) Balance at end of period $ 4,628 $ 5,062 Allowance for uncollectible accounts as a percentage of customer receivables 3.8 % 4.8 %

LONG-TERM DEBT

LONG-TERM DEBT	3 Months Ended
LONG-TERM DEBT	Mar. 31, 2024
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT 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, 2024, $1.2 billion remains available for debt issuance under the regulatory orders.

COMMON STOCK_

COMMON STOCK:	3 Months Ended
COMMON STOCK:	Mar. 31, 2024
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Common Stock	COMMON STOCK IDACORP Common Stock During the three months ended March 31, 2024, IDACORP issued an aggregate of 78,925 shares of common stock using original issuances of shares. IDACORP granted 103,771 restricted stock unit awards to employees and issued 60,856 shares of common stock pursuant to the IDACORP, Inc. 2000 Long-Term Incentive and Compensation Plan, including 10,571 shares of common stock issued to members of the board of directors. IDACORP issued 18,069 shares of common stock pursuant to its IDACORP, Inc. Dividend Reinvestment and Stock Purchase Plan. Effective January 1, 2024, IDACORP instructed the plan administrator of the IDACORP, Inc. Dividend Reinvestment and Stock Purchase Plan to use original issuance of common stock from IDACORP, as opposed to market purchases of IDACORP common stock, to acquire shares of IDACORP common stock for the plan. However, IDACORP may determine at any time to resume market purchases of common stock under the plan. As directed by IDACORP, the plan administrator of the Idaho Power Company Employee Savings Plan used market purchases of IDACORP common stock to acquire shares of IDACORP common stock for the plan. Equity Forward Sale Agreements On November 7, 2023, IDACORP announced a registered public offering of 2,801,724 shares of its common stock at a public offering price of $92.80 per share, for an aggregate amount of $260.0 million. In conjunction with this offering, IDACORP granted the underwriters an option to purchase up to 420,258 additional shares, which was subsequently exercised in full on November 8, 2023, for an additional aggregate amount of $39.0 million. The 3,221,982 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 7, 2024. 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 forward purchaser at the then-applicable forward sale price and receive issuance proceeds at that time. The forward sale price was initially $90.016 per share and is subject to certain adjustments in accordance with the terms of the FSAs through the date of settlement. At March 31, 2024, IDACORP could have settled the FSAs with physical delivery of 3,221,982 shares of common stock to the counterparty in exchange for cash of $292.5 million. The FSAs could have also been settled at March 31, 2024, with delivery of approximately $1.9 million of cash or approximately 21,000 shares of common stock to the counterparty, 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. 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. As of March 31, 2024, approximately 28,000 incremental shares 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 concerning IDACORP's diluted earnings per share. 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 Code of Business 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, 2024, the leverage ratios for IDACORP and Idaho Power were 49 percent and 50 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, 2024. 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, 2024, 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, 2024, Idaho Power's common equity capital was 50 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.

EARNINGS PER SHARE_

EARNINGS PER SHARE:	3 Months Ended
EARNINGS PER SHARE:	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands, except for per share amounts). Three months ended 2024 2023 Numerator: Net income attributable to IDACORP, Inc. $ 48,173 $ 56,098 Denominator: Weighted-average common shares outstanding - basic 50,764 50,688 Effect of dilutive securities (1) 28 35 Weighted-average common shares outstanding - diluted 50,792 50,723 Basic earnings per share $ 0.95 $ 1.11 Diluted earnings per share $ 0.95 $ 1.11 (1) The effect of dilutive securities amount includes approximately 28 thousand incremental shares related to FSAs as of March 31, 2024. See Note 6 - "Common Stock" for additional information concerning IDACORP's FSAs.

COMMITMENTS_

COMMITMENTS:	3 Months Ended
COMMITMENTS:	Mar. 31, 2024
Disclosure Text Block Supplement [Abstract]
COMMITMENTS	COMMITMENTS Purchase Obligations During the three months ended March 31, 2024, Idaho Power entered into: • two agreements in January and February 2024 to replace expiring PURPA-qualifying hydropower facility power purchase agreements, which increased Idaho Power's contractual purchase obligations by approximately $38.0 million over the 20-year term of the agreements; and • an energy and capacity market purchase agreement with an energy marketer for the right to acquire 200 MW on a daily basis during summer months, subject to regulatory approval, which increased Idaho Power's contractual purchase obligations by approximately $84.3 million over the 5-year term of the contract commencing in June 2026. Except as disclosed in this Note 8, during the three months ended March 31, 2024, 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 2023 Annual Report. 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 $47.6 million at March 31, 2024, representing IERCo's one-third share of BCC's total reclamation obligation of $142.9 million. BCC has a reclamation trust fund set aside specifically for the purpose of paying these reclamation costs. At March 31, 2024, 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, all of which are made 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, 2024, management believe 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.

CONTINGENCIES_

CONTINGENCIES:	3 Months Ended
CONTINGENCIES:	Mar. 31, 2024
Loss Contingency [Abstract]
Contingencies	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 and the operation of its power supply, transmission, and distribution facilities. 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.

BENEFIT PLANS_

BENEFIT PLANS:	3 Months Ended
BENEFIT PLANS:	Mar. 31, 2024
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, 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, 2024 and 2023 (in thousands). Pension Plan SMSP Postretirement Total 2024 2023 2024 2023 2024 2023 2024 2023 Service cost $ 8,184 $ 8,078 $ 263 $ 153 $ 164 $ 178 $ 8,611 $ 8,409 Interest cost 12,793 12,654 1,333 1,331 691 773 14,817 14,758 Expected return on plan assets (16,830) (15,434) — — (455) (419) (17,285) (15,853) Amortization of prior service cost 62 2 55 55 387 416 504 473 Amortization of net loss — — 328 142 (395) (272) (67) (130) Net periodic benefit cost 4,209 5,300 1,979 1,681 392 676 6,580 7,657 Regulatory deferral of net periodic benefit cost (1) (4,026) (5,060) — — — — (4,026) (5,060) Previously deferred pension costs recognized (1) 8,796 4,288 — — — — 8,796 4,288 Net periodic benefit cost recognized for financial reporting (1)(2) $ 8,979 $ 4,528 $ 1,979 $ 1,681 $ 392 $ 676 $ 11,350 $ 6,885 (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, $9.4 million and $5.3 million, respectively, were recognized in "Other operations and maintenance" and $2.0 million and $1.6 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, 2024 and 2023. Idaho Power has no minimum contribution requirement to its defined benefit pension plan in 2024, and during the three months ended March 31, 2024, Idaho Power made no contributions. Idaho Power is considering contributing up to $30 million to its defined benefit pension plan during 2024 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.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS:	3 Months Ended
DERIVATIVE FINANCIAL INSTRUMENTS:	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands): Gain/(Loss) on Derivatives Recognized in Income (1) Location of Realized Gain/(Loss) on Derivatives Recognized in Income Three months ended 2024 2023 Financial swaps Operating revenues $ 1,012 $ (1,079) Financial swaps Purchased power 953 1,626 Financial swaps Fuel expense (24,058) 23,537 Forward contracts Operating revenues 1,006 636 Forward contracts Purchased power (991) (600) Forward contracts Fuel expense (221) (420) (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, 2024, 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, 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 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, 2024, was $26.4 million. As of March 31, 2024, Idaho Power posted $27.1 million of cash collateral related to its derivative instruments. If the credit-risk-related contingent features underlying these agreements were triggered on March 31, 2024, Idaho Power would have been required to pay or post collateral to its counterparties up to an additional $6.1 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 at March 31, 2024, and December 31, 2023 (in thousands): Asset Derivatives Liability Derivatives Balance Sheet Location Gross Fair Value Amounts Offset Net Assets Gross Fair Value Amounts Offset Net Liabilities March 31, 2024 Current: Financial swaps Other current assets $ 215 $ (188) $ 27 $ 188 $ (188) $ — Financial swaps Other current liabilities 2,675 (2,675) — 23,494 (20,859) (1) 2,635 Forward contracts Other current liabilities — — — 1,886 — 1,886 Long-term: Financial swaps Other assets 91 (1) 90 1 (1) — Financial swaps Other liabilities 612 (612) — 727 (727) (2) — Total $ 3,593 $ (3,476) $ 117 $ 26,296 $ (21,775) $ 4,521 December 31, 2023 Current: Financial swaps Other current assets $ 241 $ (169) $ 72 $ 169 $ (169) $ — Financial swaps Other current liabilities 1,476 (1,476) — 41,977 (38,045) (3) 3,932 Forward contracts Other current liabilities — — — 2,000 — 2,000 Long-term: Financial swaps Other assets 106 (89) 17 89 (89) — Financial swaps Other liabilities 376 (376) — 2,123 (2,123) (4) — Total $ 2,199 $ (2,110) $ 89 $ 46,358 $ (40,426) $ 5,932 (1) Current liability derivative amounts offset include $18.2 million of collateral receivable at March 31, 2024. (2) Long-term liability derivative amounts offset include $114 thousand of collateral receivable at March 31, 2024. (3) Current liability derivative amounts offset include $36.6 million of collateral receivable at December 31, 2023. (4) Long-term liability derivative amounts offset include $1.7 million of collateral receivable at December 31, 2023. The table below presents the volumes of derivative commodity forward contracts and swaps outstanding at March 31, 2024 and 2023 (in thousands of units): March 31, Commodity Units 2024 2023 Electricity purchases MWh 497 1,066 Electricity sales MWh 206 40 Natural gas purchases MMBtu 28,298 31,775 Natural gas sales MMBtu 528 310

FAIR VALUE MEASUREMENTS_

FAIR VALUE MEASUREMENTS:	3 Months Ended
FAIR VALUE MEASUREMENTS:	Mar. 31, 2024
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, 2024. 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 as of March 31, 2024, and December 31, 2023 (in thousands). March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds and commercial paper IDACORP (1) $ 31,911 $ — $ — $ 31,911 $ 32,472 $ — $ — $ 32,472 Idaho Power 46,460 — — 46,460 230,600 — — 230,600 Derivatives 117 — — 117 89 — — 89 Equity securities 37,098 — — 37,098 37,320 — — 37,320 IDACORP assets measured at NAV (not subject to hierarchy disclosure) (1) — — — 3,688 — — — 3,751 Liabilities: Derivatives 2,635 1,886 — 4,521 3,932 2,000 — 5,932 (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, as of March 31, 2024, and December 31, 2023, using available market information and appropriate valuation methodologies (in thousands). March 31, 2024 December 31, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value IDACORP Assets: Notes receivable (1) $ 3,038 $ 3,038 $ 3,038 $ 3,038 Held-to-maturity securities (1)(2) 31,530 28,254 31,639 28,341 Liabilities: Long-term debt (including current portion) (1) 2,825,759 2,600,456 2,825,590 2,684,278 Idaho Power Assets: Held-to-maturity securities (1)(2) $ 31,530 $ 28,254 $ 31,639 $ 28,341 Liabilities: Long-term debt (including current portion) (1) 2,825,759 2,600,456 2,825,590 2,684,278 (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 $3.3 million as of both March 31, 2024, and December 31, 2023. 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, 2024, and December 31, 2023. 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.

SEGMENT INFORMATION_

SEGMENT INFORMATION:	3 Months Ended
SEGMENT INFORMATION:	Mar. 31, 2024
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. 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). Utility All Eliminations Consolidated Three months ended March 31, 2024: Revenues $ 448,299 $ 637 $ — $ 448,936 Net income attributable to IDACORP, Inc. 47,302 871 — 48,173 Total assets as of March 31, 2024 8,187,879 222,542 (63,010) 8,347,411 Three months ended March 31, 2023: Revenues $ 429,338 $ 321 $ — $ 429,659 Net income attributable to IDACORP, Inc. 55,710 388 — 56,098

CHANGES IN ACCUMULATED OTHER CO

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Notes)	3 Months Ended
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Notes)	Mar. 31, 2024
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, during the three months ended March 31, 2024 and 2023 (in thousands). Items in parentheses indicate charges to AOCI. Defined Benefit Pension Items Three months ended 2024 2023 Balance at beginning of period $ (17,184) $ (12,922) Amounts reclassified out of AOCI 284 146 Balance at end of period $ (16,900) $ (12,776) The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified during the three months ended March 31, 2024 and 2023 (in thousands). Items in parentheses indicate increases to net income. Amount Reclassified from AOCI Details About AOCI Three months ended 2024 2023 Amortization of defined benefit pension items (1) Prior service cost $ 55 $ 55 Net loss 328 142 Total before tax 383 197 Tax benefit (2) (99) (51) Total reclassification for the period, net of tax $ 284 $ 146 (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.

CHANGES IN IDAHO POWER RETAINED

CHANGES IN IDAHO POWER RETAINED EARNINGS (Notes)	3 Months Ended
CHANGES IN IDAHO POWER RETAINED EARNINGS (Notes)	Mar. 31, 2024
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 during the three months ended March 31, 2024 and 2023 (in thousands). Three months ended 2024 2023 Balance at beginning of period $ 1,991,319 $ 1,836,547 Net income 47,302 55,710 Dividends to parent (42,308) (359) Balance at end of period $ 1,996,313 $ 1,891,898

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income Attributable to IDACORP, Inc.	$ 48,173	$ 56,098

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
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

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Organization, Consolidation, Presentation, and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
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. 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.
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.
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, 2024, condensed consolidated statements of income for the three months ended March 31, 2024 and 2023, and condensed consolidated cash flows for the three months ended March 31, 2024 and 2023. 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 2023 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 revenues, and bad debt. 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. Recent Accounting Pronouncements Not Yet Adopted In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. This ASU is effective for annual periods beginning after December 15, 2023, and for interim periods beginning after December 15, 2024, with early adoption permitted. The amendments in this ASU will be applied retrospectively. IDACORP and Idaho Power are currently evaluating the impact that adoption of this ASU will have on the notes to their respective financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures which expands the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendments in this ASU are required to be applied prospectively and are allowed to be applied retrospectively. IDACORP and Idaho Power are currently evaluating the impact that adoption of this ASU will have on the notes to their respective financial statements. There have been no other recent 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. For each forward sale, Idaho Power simultaneously enters into a matching forward purchase 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.
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.
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block]	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.
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.
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.

INCOME TAXES_ Level 3 (Tables)

INCOME TAXES: Level 3 (Tables)	3 Months Ended
INCOME TAXES: Level 3 (Tables)	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands): IDACORP Idaho Power 2024 2023 2024 2023 Income tax at statutory rates (federal and state) $ 10,972 $ 16,266 $ 10,880 $ 16,299 Excess deferred income tax reversal (2,512) (2,671) (2,512) (2,671) Other (1) (1,506) (2,750) (899) (2,268) Income tax expense before additional ADITC amortization $ 6,954 $ 10,845 $ 7,469 $ 11,360 Additional ADITC amortization (12,500) (3,750) (12,500) (3,750) Income tax (benefit) expense $ (5,546) $ 7,095 $ (5,031) $ 7,610 Effective tax rate (13.0) % 11.2 % (11.9) % 12.0 %

REVENUES_ Electric utility oper

REVENUES: Electric utility operating revenues (Tables)	3 Months Ended
REVENUES: Electric utility operating revenues (Tables)	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Revenue from contracts with customers $ 417,897 $ 385,666 Alternative revenue programs and other revenues 30,402 43,672 Total electric utility operating revenues $ 448,299 $ 429,338
Disaggregation of Revenue [Table Text Block]	The following table presents revenues from contracts with customers disaggregated by revenue source for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Retail revenues: Residential (includes $(687) and $8,909, respectively, related to the FCA) (1) $ 184,300 $ 188,536 Commercial (includes $(53) and $276, respectively, related to the FCA) (1) 94,697 87,830 Industrial 65,206 55,544 Irrigation 1,038 933 Deferred revenue related to HCC relicensing AFUDC (2) (2,084) (2,119) Total retail revenues 343,157 330,724 Less: FCA mechanism revenues (1) 740 (9,185) Wholesale energy sales 38,069 30,195 Transmission wheeling-related revenues 24,162 21,585 Energy efficiency program revenues 4,291 5,215 Other revenues from contracts with customers 7,478 7,132 Total revenues from contracts with customers $ 417,897 $ 385,666 (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, even though the relicensing process is not yet complete and the costs have not been moved to electric plant in service. Idaho Power is collecting $8.8 million annually in the Idaho jurisdiction but is deferring revenue recognition of the amounts collected 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 for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 FCA mechanism revenues $ (740) 9,185 Derivative revenues 31,142 34,487 Total alternative revenue programs and other revenues $ 30,402 $ 43,672
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 for the three months ended March 31, 2024 and 2023 (in thousands): Three months ended 2024 2023 Balance at beginning of period $ 4,869 $ 5,034 Additions to the allowance 267 577 Write-offs, net of recoveries (508) (549) Balance at end of period $ 4,628 $ 5,062 Allowance for uncollectible accounts as a percentage of customer receivables 3.8 % 4.8 %

EARNINGS PER SHARE_ Level 3 (Ta

EARNINGS PER SHARE: Level 3 (Tables)	3 Months Ended
EARNINGS PER SHARE: Level 3 (Tables)	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands, except for per share amounts). Three months ended 2024 2023 Numerator: Net income attributable to IDACORP, Inc. $ 48,173 $ 56,098 Denominator: Weighted-average common shares outstanding - basic 50,764 50,688 Effect of dilutive securities (1) 28 35 Weighted-average common shares outstanding - diluted 50,792 50,723 Basic earnings per share $ 0.95 $ 1.11 Diluted earnings per share $ 0.95 $ 1.11 (1) The effect of dilutive securities amount includes approximately 28 thousand incremental shares related to FSAs as of March 31, 2024. See Note 6 - "Common Stock" for additional information concerning IDACORP's FSAs.

BENEFIT PLANS_ Level 3 (Tables)

BENEFIT PLANS: Level 3 (Tables)	3 Months Ended
BENEFIT PLANS: Level 3 (Tables)	Mar. 31, 2024
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, 2024 and 2023 (in thousands). Pension Plan SMSP Postretirement Total 2024 2023 2024 2023 2024 2023 2024 2023 Service cost $ 8,184 $ 8,078 $ 263 $ 153 $ 164 $ 178 $ 8,611 $ 8,409 Interest cost 12,793 12,654 1,333 1,331 691 773 14,817 14,758 Expected return on plan assets (16,830) (15,434) — — (455) (419) (17,285) (15,853) Amortization of prior service cost 62 2 55 55 387 416 504 473 Amortization of net loss — — 328 142 (395) (272) (67) (130) Net periodic benefit cost 4,209 5,300 1,979 1,681 392 676 6,580 7,657 Regulatory deferral of net periodic benefit cost (1) (4,026) (5,060) — — — — (4,026) (5,060) Previously deferred pension costs recognized (1) 8,796 4,288 — — — — 8,796 4,288 Net periodic benefit cost recognized for financial reporting (1)(2) $ 8,979 $ 4,528 $ 1,979 $ 1,681 $ 392 $ 676 $ 11,350 $ 6,885 (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, $9.4 million and $5.3 million, respectively, were recognized in "Other operations and maintenance" and $2.0 million and $1.6 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, 2024 and 2023.

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS: Level 3 (Tables)	3 Months Ended
DERIVATIVE FINANCIAL INSTRUMENTS: Level 3 (Tables)	Mar. 31, 2024
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 for the three months ended March 31, 2024 and 2023 (in thousands): Gain/(Loss) on Derivatives Recognized in Income (1) Location of Realized Gain/(Loss) on Derivatives Recognized in Income Three months ended 2024 2023 Financial swaps Operating revenues $ 1,012 $ (1,079) Financial swaps Purchased power 953 1,626 Financial swaps Fuel expense (24,058) 23,537 Forward contracts Operating revenues 1,006 636 Forward contracts Purchased power (991) (600) Forward contracts Fuel expense (221) (420) (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 at March 31, 2024, and December 31, 2023 (in thousands): Asset Derivatives Liability Derivatives Balance Sheet Location Gross Fair Value Amounts Offset Net Assets Gross Fair Value Amounts Offset Net Liabilities March 31, 2024 Current: Financial swaps Other current assets $ 215 $ (188) $ 27 $ 188 $ (188) $ — Financial swaps Other current liabilities 2,675 (2,675) — 23,494 (20,859) (1) 2,635 Forward contracts Other current liabilities — — — 1,886 — 1,886 Long-term: Financial swaps Other assets 91 (1) 90 1 (1) — Financial swaps Other liabilities 612 (612) — 727 (727) (2) — Total $ 3,593 $ (3,476) $ 117 $ 26,296 $ (21,775) $ 4,521 December 31, 2023 Current: Financial swaps Other current assets $ 241 $ (169) $ 72 $ 169 $ (169) $ — Financial swaps Other current liabilities 1,476 (1,476) — 41,977 (38,045) (3) 3,932 Forward contracts Other current liabilities — — — 2,000 — 2,000 Long-term: Financial swaps Other assets 106 (89) 17 89 (89) — Financial swaps Other liabilities 376 (376) — 2,123 (2,123) (4) — Total $ 2,199 $ (2,110) $ 89 $ 46,358 $ (40,426) $ 5,932 (1) Current liability derivative amounts offset include $18.2 million of collateral receivable at March 31, 2024. (2) Long-term liability derivative amounts offset include $114 thousand of collateral receivable at March 31, 2024. (3) Current liability derivative amounts offset include $36.6 million of collateral receivable at December 31, 2023. (4) Long-term liability derivative amounts offset include $1.7 million of collateral receivable at December 31, 2023.
Schedule of Derivative Instruments	The table below presents the volumes of derivative commodity forward contracts and swaps outstanding at March 31, 2024 and 2023 (in thousands of units): March 31, Commodity Units 2024 2023 Electricity purchases MWh 497 1,066 Electricity sales MWh 206 40 Natural gas purchases MMBtu 28,298 31,775 Natural gas sales MMBtu 528 310

FAIR VALUE MEASUREMENTS_ Level

FAIR VALUE MEASUREMENTS: Level 3 (Tables)	3 Months Ended
FAIR VALUE MEASUREMENTS: Level 3 (Tables)	Mar. 31, 2024
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 as of March 31, 2024, and December 31, 2023 (in thousands). March 31, 2024 December 31, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds and commercial paper IDACORP (1) $ 31,911 $ — $ — $ 31,911 $ 32,472 $ — $ — $ 32,472 Idaho Power 46,460 — — 46,460 230,600 — — 230,600 Derivatives 117 — — 117 89 — — 89 Equity securities 37,098 — — 37,098 37,320 — — 37,320 IDACORP assets measured at NAV (not subject to hierarchy disclosure) (1) — — — 3,688 — — — 3,751 Liabilities: Derivatives 2,635 1,886 — 4,521 3,932 2,000 — 5,932 (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, as of March 31, 2024, and December 31, 2023, using available market information and appropriate valuation methodologies (in thousands). March 31, 2024 December 31, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value IDACORP Assets: Notes receivable (1) $ 3,038 $ 3,038 $ 3,038 $ 3,038 Held-to-maturity securities (1)(2) 31,530 28,254 31,639 28,341 Liabilities: Long-term debt (including current portion) (1) 2,825,759 2,600,456 2,825,590 2,684,278 Idaho Power Assets: Held-to-maturity securities (1)(2) $ 31,530 $ 28,254 $ 31,639 $ 28,341 Liabilities: Long-term debt (including current portion) (1) 2,825,759 2,600,456 2,825,590 2,684,278 (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 $3.3 million as of both March 31, 2024, and December 31, 2023. 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, 2024, and December 31, 2023.

SEGMENT INFORMATION_ Level 3 (T

SEGMENT INFORMATION: Level 3 (Tables)	3 Months Ended
SEGMENT INFORMATION: Level 3 (Tables)	Mar. 31, 2024
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). Utility All Eliminations Consolidated Three months ended March 31, 2024: Revenues $ 448,299 $ 637 $ — $ 448,936 Net income attributable to IDACORP, Inc. 47,302 871 — 48,173 Total assets as of March 31, 2024 8,187,879 222,542 (63,010) 8,347,411 Three months ended March 31, 2023: Revenues $ 429,338 $ 321 $ — $ 429,659 Net income attributable to IDACORP, Inc. 55,710 388 — 56,098

CHANGES IN ACCUMULATED OTHER _2

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	3 Months Ended
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	Mar. 31, 2024
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, during the three months ended March 31, 2024 and 2023 (in thousands). Items in parentheses indicate charges to AOCI. Defined Benefit Pension Items Three months ended 2024 2023 Balance at beginning of period $ (17,184) $ (12,922) Amounts reclassified out of AOCI 284 146 Balance at end of period $ (16,900) $ (12,776)
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 during the three months ended March 31, 2024 and 2023 (in thousands). Items in parentheses indicate increases to net income. Amount Reclassified from AOCI Details About AOCI Three months ended 2024 2023 Amortization of defined benefit pension items (1) Prior service cost $ 55 $ 55 Net loss 328 142 Total before tax 383 197 Tax benefit (2) (99) (51) Total reclassification for the period, net of tax $ 284 $ 146 (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.

CHANGES IN IDAHO POWER RETAIN_2

CHANGES IN IDAHO POWER RETAINED EARNINGS (Tables)	3 Months Ended
CHANGES IN IDAHO POWER RETAINED EARNINGS (Tables)	Mar. 31, 2024
Changes in Idaho Power Retained Earnings [Abstract]
Changes in Idaho Power Retained Earnings Table	Three months ended 2024 2023 Balance at beginning of period $ 1,991,319 $ 1,836,547 Net income 47,302 55,710 Dividends to parent (42,308) (359) Balance at end of period $ 1,996,313 $ 1,891,898

INCOME TAXES_ Level 4 (Details)

INCOME TAXES: Level 4 (Details) - USD ($) $ in Thousands		3 Months Ended
INCOME TAXES: Level 4 (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Mar. 31, 2023
Income Tax Expense [Line Items]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		$ 10,972	$ 16,266
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount		(12,500)	(3,750)
Excess deferred income tax reversal		(2,512)	(2,671)
Other	[1]	(1,506)	(2,750)
Income tax expense before additional ADITC amortization		6,954	10,845
Income Tax Expense		$ (5,546)	$ 7,095
Effective tax rate		(13.00%)	11.20%
Idaho Power Company
Income Tax Expense [Line Items]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		$ 10,880	$ 16,299
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount		(12,500)	(3,750)
Excess deferred income tax reversal		(2,512)	(2,671)
Other	[1]	(899)	(2,268)
Income tax expense before additional ADITC amortization		7,469	11,360
Income Tax Expense		$ (5,031)	$ 7,610
Effective tax rate		(11.90%)	12%

[1]"Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.

REGULATORY MATTERS_ Level 4 (De

REGULATORY MATTERS: Level 4 (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Oct. 15, 2024	Mar. 31, 2024	Mar. 31, 2023	May 31, 2025	Jun. 01, 2024	Jun. 01, 2023	Jun. 01, 2022	Jun. 01, 2020	May 31, 2018
Settlement Stipulation - Investment Tax Credits and Idaho Sharing Mechanism
Regulatory Matters
Additional accumulated deferred investment tax credits (ADITC) amortization		$ 12,500	$ 3,750
Investment Tax Credits, Remains Available		$ 73,500
Idaho fixed cost adjustment mechanism
Regulatory Matters
Percentage cap on the FCA adjustment								3%
Idaho Jurisdiction Fixed Cost Adjustment
Regulatory Matters
Annual fixed cost adjustment mechanism deferral						$ 36,800	$ 25,100
Subsequent Event \| Idaho Power Cost Adjustment
Regulatory Matters
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 35,700
Subsequent Event \| Oregon jurisdiction
Regulatory Matters
Annual Power Cost Update					$ 6,900
Subsequent Event \| Idaho Power Fixed Cost Adjustment
Regulatory Matters
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 11,700
IDAHO \| 2023 Settlement Stipulation
Regulatory Matters
Minimum authorized return on equity									9.12%
Authorized Return on Equity in Rate Case, Maximum									9.60%
Investment Tax Credits Maximum In One Year In Rate Case									$ 25,000
OREGON \| Subsequent Event \| Idaho Power Company
Regulatory Matters
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount	$ 10,700
Public Utilities, Requested Rate Increase (Decrease), Amended, Percentage	19.28%
Public Utilities, Requested Return on Equity, Percentage	10.40%
OREGON \| Subsequent Event \| Idaho Power Company \| Cost of Capital and Capital Structure
Regulatory Matters
Total Retail Rate Base	$ 188,900
Requested Rate of Return	7.807%

REVENUES_ Electric utility op_2

REVENUES: Electric utility operating revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues [Abstract]
Revenue from contracts with customers	$ 417,897	$ 385,666
Alternative revenue programs and other revenues	30,402	43,672
Electric utility revenues	$ 448,299	$ 429,338

REVENUES_ (Details)

REVENUES: (Details) - USD ($) $ in Thousands		3 Months Ended
REVENUES: (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 417,897	$ 385,666
Alternative revenue programs and other revenues		30,402	43,672
Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		343,157	330,724
Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	740	(9,185)
Alternative revenue programs and other revenues		(740)	9,185
Wholesale energy sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		38,069	30,195
Transmission Service Agreement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		24,162	21,585
Energy efficiency program revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		4,291	5,215
Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		7,478	7,132
Derivative revenues
Disaggregation of Revenue [Line Items]
Alternative revenue programs and other revenues		31,142	34,487
Residential Retail Revenue \| Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	184,300	188,536
Residential Retail Revenue \| Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		(687)	8,909
Commercial Retail Revenue \| Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	94,697	87,830
Commercial Retail Revenue \| Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		(53)	276
Industrial Retail Revenue \| Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		65,206	55,544
Irrigation Retail Revenue \| Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		1,038	933
Deferred revenue-AFUDC \| Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	(2,084)	(2,119)
IPUC authorized AFUDC Collection HCC Relicensing - Gross \| Idaho Power Company \| Hells Canyon Complex
Disaggregation of Revenue [Line Items]
Regulatory liabilities		$ (8,800)	$ (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, even though the relicensing process is not yet complete and the costs have not been moved to electric plant in service. Idaho Power is collecting $8.8 million annually in the Idaho jurisdiction but is deferring revenue recognition of the amounts collected until the license is issued and the accumulated license costs approved for recovery are placed in service.

REVENUES_ Receivables and Allow

REVENUES: Receivables and Allowance for Uncollectible Accounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 4,869	$ 5,034
Additions to the allowance	267	577
Write-offs, net of recoveries	(508)	(549)
Balance at end of period	$ 4,628	$ 5,062
Allowance for uncollectible accounts as a percentage of customer receivables	3.80%	4.80%

LONG-TERM DEBT (Details)

LONG-TERM DEBT (Details) - Idaho Power Company $ in Millions	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Debt instrument interest rate limit	8%
Principal amount of debt securities and first mortgage bonds authorized	$ 1,200
Public Utility Commisions - Idaho, Oregon, and Washington
Debt Instrument [Line Items]
Indenture, Unused Borrowing Capacity, Amount	$ 1,200

COMMON STOCK_ Level 4 (Details)

COMMON STOCK: Level 4 (Details) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares
Shareholders' equity
Registered Public Offering, Initial Common Shares Offered			2,801,724
Registered Public Offering, Price Per Share \| $ / shares			$ 92.80
Registered Public Offering, Issuance Amount \| $			$ 260,000
Registered Public Offering, Initial Common Shares Offered, Greenshoe			420,258
Registered Public Offering, Issuance Amount, Greenshoe \| $			$ 39,000
Registered Public Offering, Initial Common Shares Offered, Total			3,221,982
Initial Forward Sale Price, Per Share \| $ / shares			$ 90.016
Common Shares To Deliver To Settle Forward Sales Agreement, Gross		3,221,982
Cash Received On Settlement Of Forward Sale Agreement \| $		$ 292,500
Cash To Deliver To Settle Forward Sales Agreement, Net \| $		$ 1,900
Common Shares To Deliver To Settle Forward Sales Agreement, Net		21,000
Effect of dilutive securities	[1]	28,000
Idaho Power Company
Shareholders' equity
Ratio of Indebtedness to Net Capital		0.50
Dividend Distribution Restriction Amount \| $		$ 1,300,000
Dividend Distribution Restriction Threshold		0.35
Ratio of total Capital to total capital and long-term debt		0.50
Preferred Stock, Shares Outstanding		0
IDACORP
Shareholders' equity
Restricted Stock Unit Awards to Employees		103,771
Stock Issued During Period, Shares, New Issues		78,925
Maximum leverage ratio requirement		0.65
Ratio of Indebtedness to Net Capital		0.49
Dividend Distribution Restriction Amount \| $		$ 1,400,000
IDACORP \| Dividend Reinvestment and Stock Purchase Plan
Shareholders' equity
Stock Issued During Period, Shares, New Issues		18,069
IDACORP \| Directors
Shareholders' equity
Stock Issued During Period, Shares, New Issues		10,571
IDACORP \| Performance Shares
Shareholders' equity
Stock Issued During Period, Shares, New Issues		60,856

[1]The effect of dilutive securities amount includes approximately 28 thousand incremental shares related to FSAs as of March 31, 2024. See Note 6 - "Common Stock" for additional information concerning IDACORP's FSAs.

EARNINGS PER SHARE_ Level 4 (De

EARNINGS PER SHARE: Level 4 (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net Income Attributable to IDACORP, Inc.		$ 48,173	$ 56,098
Denominator:
Weighted-average common shares outstanding - basic		50,764,000	50,688,000
Effect of dilutive securities			35,000
Effect of dilutive securities	[1]	28,000
Weighted-average common shares outstanding - diluted		50,792,000	50,723,000
Earnings attributable to IDACORP, Inc. - basic (in dollars per share)		$ 0.95	$ 1.11
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share)		$ 0.95	$ 1.11

[1]The effect of dilutive securities amount includes approximately 28 thousand incremental shares related to FSAs as of March 31, 2024. See Note 6 - "Common Stock" for additional information concerning IDACORP's FSAs.

COMMITMENTS_ Level 4 (Details)

COMMITMENTS: Level 4 (Details) $ in Thousands	3 Months Ended
COMMITMENTS: Level 4 (Details) $ in Thousands	Mar. 31, 2024 USD ($) MWh
Idaho Power Company
Guarantor Obligations
IERCo guarantee of BCC reclamation obligation	$ 47,600
Idaho Power Company \| Cogeneration And Power Production Purchase Commitment Member
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Long-term Purchase Commitment, Period	20 years
Increase of Long-term Purchase Obligations, PURPA	$ 38,000
Idaho Power Company \| Contract to Acquire Energy And Capacity
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Long-term Purchase Commitment, Period	5 years
Nameplate Capacity \| MWh	200
Increase of Long-term Purchase Obligations, PURPA	$ 84,300
Bridger Coal Company
Guarantor Obligations
IERCo guarantee of BCC reclamation obligation	$ 142,900

BENEFIT PLANS_ Level 4 (Details

BENEFIT PLANS: Level 4 (Details) - USD ($) $ in Thousands		3 Months Ended
BENEFIT PLANS: Level 4 (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plan Disclosure
Service cost		$ 8,611	$ 8,409
Interest cost		14,817	14,758
Expected return on plan assets		(17,285)	(15,853)
Amortization of prior service cost		504	473
Amortization of net loss		(67)	(130)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		6,580	7,657
Regulatory deferral of net periodic benefit cost	[1]	(4,026)	(5,060)
IPUC Authorized recovered pension cost	[1]	8,796	4,288
Net periodic benefit cost recognized for financial reporting	[1],[2]	11,350	6,885
Net Periodic Benefit cost recognize in Other operations and maintenance		9,400	5,300
Net Periodic Benefit cost recognized in other expense, net		2,000	1,600
Pension Plan
Defined Benefit Plan Disclosure
Service cost		8,184	8,078
Interest cost		12,793	12,654
Expected return on plan assets		(16,830)	(15,434)
Amortization of prior service cost		62	2
Amortization of net loss		0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		4,209	5,300
Regulatory deferral of net periodic benefit cost	[1]	(4,026)	(5,060)
IPUC Authorized recovered pension cost	[1]	8,796	4,288
Net periodic benefit cost recognized for financial reporting	[1],[2]	8,979	4,528
Pension Plan \| Idaho Power Company
Defined Benefit Plan Disclosure
Defined Benefit Plan, Contributions by Employer		0
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		30,000
Senior Management Security Plan
Defined Benefit Plan Disclosure
Service cost		263	153
Interest cost		1,333	1,331
Expected return on plan assets		0	0
Amortization of prior service cost		55	55
Amortization of net loss		328	142
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		1,979	1,681
Net periodic benefit cost recognized for financial reporting		1,979	1,681
Postretirement Benefits Plan
Defined Benefit Plan Disclosure
Service cost		164	178
Interest cost		691	773
Expected return on plan assets		(455)	(419)
Amortization of prior service cost		387	416
Amortization of net loss		(395)	(272)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		392	676
Net periodic benefit cost recognized for financial reporting		$ 392	$ 676

[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, $9.4 million and $5.3 million, respectively, were recognized in "Other operations and maintenance" and $2.0 million and $1.6 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, 2024 and 2023.

Derivative Instruments Gains (L

Derivative Instruments Gains (Loss) on Derivatives Recognized in Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Financial Swaps \| Operating revenues
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	$ 1,012	$ (1,079)
Financial Swaps \| Purchased power
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	953	1,626
Financial Swaps \| Operating Expense
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	(24,058)	23,537
Forward contracts \| Operating revenues
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	1,006	636
Forward contracts \| Purchased power
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	(991)	(600)
Forward contracts \| Operating Expense
Derivative Instruments, Gain (Loss)
Derivative, Gain (Loss) on Derivative, Net	[1]	$ (221)	$ (420)

[1] Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.

Derivative Instruments Fair Val

Derivative Instruments Fair Value and Offsets Table (Details) - USD ($) $ in Thousands	Mar. 31, 2024		Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 3,593		$ 2,199
Derivative Asset, Fair Value, Gross Liability	(3,476)		(2,110)
Derivative Asset, Fair Value, Amount Offset Against Collateral	117		89
Derivative Liability, Fair Value, Gross Liability	26,296		46,358
Derivative Liability, Fair Value, Gross Asset	(21,775)		(40,426)
Derivative Liability, Fair Value, Amount Offset Against Collateral	4,521		5,932
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	18,200		36,600
Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	114		1,700
Financial Swaps \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	215		241
Derivative Asset, Fair Value, Gross Liability	(188)		(169)
Derivative Asset, Fair Value, Amount Offset Against Collateral	27		72
Derivative Liability, Fair Value, Gross Liability	188		169
Derivative Liability, Fair Value, Gross Asset	(188)		(169)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0		0
Financial Swaps \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,675		1,476
Derivative Asset, Fair Value, Gross Liability	(2,675)		(1,476)
Derivative Asset, Fair Value, Amount Offset Against Collateral	0		0
Derivative Liability, Fair Value, Gross Liability	23,494		41,977
Derivative Liability, Fair Value, Gross Asset	(20,859)	[1]	(38,045)	[2]
Derivative Liability, Fair Value, Amount Offset Against Collateral	2,635		3,932
Financial Swaps \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	91		106
Derivative Asset, Fair Value, Gross Liability	(1)		(89)
Derivative Asset, Fair Value, Amount Offset Against Collateral	90		17
Derivative Liability, Fair Value, Gross Liability	1		89
Derivative Liability, Fair Value, Gross Asset	(1)		(89)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0		0
Financial Swaps \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	612		376
Derivative Asset, Fair Value, Gross Liability	(612)		(376)
Derivative Asset, Fair Value, Amount Offset Against Collateral	0		0
Derivative Liability, Fair Value, Gross Liability	727		2,123
Derivative Liability, Fair Value, Gross Asset	(727)	[3]	(2,123)	[4]
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	1,886		2,000
Derivative Liability, Fair Value, Gross Asset	0		0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 1,886		$ 2,000

[1] (1) Current liability derivative amounts offset include $18.2 million of collateral receivable at March 31, 2024. (2) Long-term liability derivative amounts offset include $114 thousand of collateral receivable at March 31, 2024.

Derivative Commodities and Disc

Derivative Commodities and Disclosures (Details) MWh in Thousands, MMBTU in Thousands	Mar. 31, 2024 MWh MMBTU	Mar. 31, 2023 MMBTU MWh
Electricity (MWh) \| Long
Derivative
Derivative, Number of Instruments Held \| MWh	497	1,066
Electricity (MWh) \| Short
Derivative
Derivative, Number of Instruments Held \| MWh	206	40
Natural Gas (MMBTU) \| Long
Derivative
Derivative, Number of Instruments Held \| MMBTU	28,298	31,775
Natural Gas (MMBTU) \| Short
Derivative
Derivative, Number of Instruments Held \| MMBTU	528	310

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS: - Narrative (Details) $ in Millions	Mar. 31, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives in a net liability position	$ 26.4
Collateral Already Posted, Aggregate Fair Value	27.1
Additional Collateral, Aggregate Fair Value	$ 6.1

FAIR VALUE MEASUREMENTS_ Leve_2

FAIR VALUE MEASUREMENTS: Level 4 (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	$ 31,911	$ 32,472
Derivative Assets		117	89
Equity Securities, FV-NI		37,098	37,320
Derivative Liabilities		4,521	5,932
Idaho Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds		46,460	230,600
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	31,911	32,472
Derivative Assets		117	89
Equity Securities, FV-NI		37,098	37,320
Assets, Fair Value Disclosure	[1]	0	0
Derivative Liabilities		2,635	3,932
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		46,460	230,600
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	0
Equity Securities, FV-NI		0	0
Assets, Fair Value Disclosure	[1]	0	0
Derivative Liabilities		1,886	2,000
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]	$ 3,688	$ 3,751

[1]Holding company only. Does not include amounts held by Idaho Power.

FAIR VALUE MEASUREMENTS_ Fair V

FAIR VALUE MEASUREMENTS: Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
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		$ 3,300	$ 3,300
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Receivable	[1]	3,038	3,038
Held-to-maturity securities	[1],[2]	31,530	31,639
Long-term debt	[1]	2,825,759	2,825,590
Carrying Amount \| Idaho Power Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	[1],[2]	31,530	31,639
Long-term debt	[1]	2,825,759	2,825,590
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Receivable	[1]	3,038	3,038
Held-to-maturity securities	[1],[2]	28,254	28,341
Long-term debt	[1]	2,600,456	2,684,278
Estimated Fair Value \| Idaho Power Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	[1],[2]	28,254	28,341
Long-term debt	[1]	$ 2,600,456	$ 2,684,278

[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) All held-to-maturity securities are carried at amortized cost and were in a gross unrealized holding loss position totaling $3.3 million as of both March 31, 2024, and December 31, 2023. 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, 2024, and December 31, 2023.

SEGMENT INFORMATION_ Level 4 (D

SEGMENT INFORMATION: Level 4 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information
Total operating revenues	$ 448,936	$ 429,659
Net Income Attributable to IDACORP, Inc.	48,173	56,098
Total assets	8,347,411		$ 8,475,918
Eliminations
Segment Reporting Information
Total operating revenues	0	0
Net Income Attributable to IDACORP, Inc.	0	0
Total assets	(63,010)
Utility Operations \| Operating Segments
Segment Reporting Information
Total operating revenues	448,299	429,338
Net Income Attributable to IDACORP, Inc.	47,302	55,710
Total assets	8,187,879
All Other \| Operating Segments
Segment Reporting Information
Total operating revenues	637	321
Net Income Attributable to IDACORP, Inc.	871	$ 388
Total assets	$ 222,542

CHANGES IN ACCUMULATED OTHER _3

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance		$ (17,184)
Reclassifications		284	$ 146
AOCI - Ending Balance		(16,900)
Reclassification out of Accumulated Other Comprehensive Income
Amortization of prior service cost	[1]	55	55
Amortization of net loss	[1]	328	142
Total reclassification, before tax - pension and postretirement benefits		383	197
Tax benefit	[2]	(99)	(51)
Reclassifications		284	146
Accumulated Defined Benefit Pension Items
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance		(17,184)	(12,922)
Reclassifications		284	146
AOCI - Ending Balance		(16,900)	(12,776)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications		$ 284	$ 146

[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.

CHANGES IN IDAHO POWER RETAIN_3

CHANGES IN IDAHO POWER RETAINED EARNINGS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Retained Earnings Roll Forward [Roll Forward]
Balance at beginning of period	$ 2,036,138
Net Income Attributable to IDACORP, Inc.	48,173	$ 56,098
Dividends to parent	(42,742)	(40,502)
Balance at end of period	2,042,003
Idaho Power Company
Retained Earnings Roll Forward [Roll Forward]
Balance at beginning of period	1,991,319	1,836,547
Net Income Attributable to IDACORP, Inc.	47,302	55,710
Dividends	42,308	359
Dividends to parent	(42,777)	(552)
Balance at end of period	$ 1,996,313	$ 1,891,898