Idaho Power 10-Q 31 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2019	Oct. 25, 2019
Document Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
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		50,397,376
Entity Central Index Key	0001057877
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
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	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Revenues:
Electric utility revenues	$ 385,028	$ 407,355	$ 1,050,574	$ 1,055,515
Other operating revenues	1,292	1,446	2,961	3,345
Total operating revenues	386,320	408,801	1,053,535	1,058,860
Operating Expenses:
Purchased power	93,618	92,393	214,512	217,301
Fuel expense	46,881	53,623	119,577	102,873
Power cost adjustment	(16,412)	(5,075)	25,935	40,427
Other operations and maintenance	87,151	91,563	263,064	270,075
Energy efficiency programs	8,438	9,309	30,008	25,708
Depreciation	42,601	41,668	126,006	123,084
Taxes other than income taxes	8,827	8,911	27,064	27,306
Total electric utility expenses	271,104	292,392	806,166	806,774
Other	1,060	1,176	3,313	3,430
Total operating expenses	272,164	293,568	809,479	810,204
Operating Income	114,156	115,233	244,056	248,656
Other Income (Expense):
Allowance for equity funds used during construction	6,803	6,047	19,857	18,065
Earnings of equity-method investments	4,166	6,665	9,545	12,218
Other Income (Expense), Net	1,825	350	4,999	199
Interest Expense:
Interest on long-term debt	20,489	21,153	62,799	63,252
Other interest	3,748	3,189	10,886	8,310
Allowance for borrowed funds used during construction	(2,666)	(2,506)	(7,989)	(7,584)
Total interest expense, net	21,571	21,836	65,696	63,978
Income Before Income Taxes	105,379	106,459	212,761	215,160
Income Tax Expense	15,161	3,868	26,506	13,866
Net Income	90,218	102,591	186,255	201,294
Income attributable to noncontrolling interests	(342)	(360)	(537)	(633)
Net Income Attributable to IDACORP, Inc.	$ 89,876	$ 102,231	$ 185,718	$ 200,661
Weighted-average common shares outstanding - basic	50,499	50,434	50,502	50,431
Weighted-average common shares outstanding - diluted	50,558	50,565	50,528	50,503
Earnings Per Share of Common Stock:
Earnings attributable to IDACORP, Inc. - basic (in dollars per share)	$ 1.78	$ 2.03	$ 3.68	$ 3.98
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share)	$ 1.78	$ 2.02	$ 3.68	$ 3.97
Idaho Power Company
Operating Revenues:
Electric utility revenues	$ 385,028	$ 407,355	$ 1,050,574	$ 1,055,515
Operating Expenses:
Purchased power	93,618	92,393	214,512	217,301
Fuel expense	46,881	53,623	119,577	102,873
Power cost adjustment	(16,412)	(5,075)	25,935	40,427
Other operations and maintenance	87,151	91,563	263,064	270,075
Energy efficiency programs	8,438	9,309	30,008	25,708
Depreciation	42,601	41,668	126,006	123,084
Taxes other than income taxes	8,827	8,911	27,064	27,306
Total electric utility expenses	271,104	292,392	806,166	806,774
Operating Income	113,924	114,963	244,408	248,741
Other Income (Expense):
Allowance for equity funds used during construction	6,803	6,047	19,857	18,065
Earnings of equity-method investments	3,100	5,564	7,365	10,390
Other Income (Expense), Net	770	(398)	1,858	(1,917)
Total other income	10,673	11,213	29,080	26,538
Interest Expense:
Interest on long-term debt	20,489	21,153	62,799	63,252
Other interest	3,741	3,174	10,847	8,268
Allowance for borrowed funds used during construction	(2,666)	(2,506)	(7,989)	(7,584)
Total interest expense, net	21,564	21,821	65,657	63,936
Income Before Income Taxes	103,033	104,355	207,831	211,343
Income Tax Expense	15,054	4,161	27,091	14,656
Net Income	$ 87,979	$ 100,194	$ 180,740	$ 196,687

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Income	$ 90,218	$ 102,591	$ 186,255	$ 201,294
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax	488	721	1,464	2,164
Total Comprehensive Income	90,706	103,312	187,719	203,458
Comprehensive (income) loss attributable to noncontrolling interests	(342)	(360)	(537)	(633)
Comprehensive Income Attributable to IDACORP, Inc.	90,364	102,952	187,182	202,825
Idaho Power Company
Net Income	87,979	100,194	180,740	196,687
Other Comprehensive Income:
Unfunded pension liability adjustment, net of tax	488	721	1,464	2,164
Total Comprehensive Income	$ 88,467	$ 100,915	$ 182,204	$ 198,851

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Unfunded pension liability adjustment, tax	$ 170	$ 250	$ 508	$ 750
Idaho Power Company
Unfunded pension liability adjustment, tax	$ 170	$ 250	$ 508	$ 750

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets Statement - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 260,571	$ 267,492
Receivables:
Customer	99,143	77,178
Other	15,220	7,476
Income taxes receivable	0	4,356
Accrued unbilled revenues	52,926	69,318
Materials and supplies (at average cost)	57,513	54,987
Fuel stock (at average cost)	59,913	47,979
Prepayments	14,152	16,492
Current regulatory assets	43,811	48,707
Other	916	3,655
Total current assets	604,165	597,640
Investments	89,808	101,178
Property, Plant and Equipment:
Utility plant in service	6,206,105	6,103,856
Accumulated provision for depreciation	(2,284,787)	(2,210,781)
Utility plant in service - net	3,921,318	3,893,075
Construction work in progress	533,424	480,259
Utility plant held for future use	4,689	4,751
Other property, net of accumulated depreciation	17,315	17,650
Property, plant and equipment - net	4,476,746	4,395,735
Other Assets:
Company-owned life insurance	58,790	59,852
Regulatory assets	1,210,924	1,165,467
Other	61,886	62,882
Total other assets	1,331,600	1,288,201
Total	6,502,319	6,382,754
Current Liabilities:
Accounts payable	84,287	110,824
Taxes accrued	53,253	12,009
Interest accrued	20,663	23,622
Accrued compensation	43,659	55,121
Current regulatory liabilities	44,890	25,883
Advances from customers	31,342	20,037
Other	12,988	11,096
Total current liabilities	291,082	258,592
Other Liabilities:
Deferred income taxes	678,774	699,878
Regulatory liabilities	770,034	738,994
Pension and other postretirement benefits	410,799	431,475
Other	45,126	43,216
Total other liabilities	1,904,733	1,913,563
Long-Term Debt	1,836,395	1,834,788
Commitments and Contingencies
Equity:
Common stock	866,131	863,593
Retained earnings	1,621,342	1,531,543
Accumulated other comprehensive loss	(21,380)	(22,844)
Treasury stock	(1,972)	(1,932)
Total IDACORP, Inc. shareholders’ equity	2,464,121	2,370,360
Noncontrolling interests	5,988	5,451
Total equity	2,470,109	2,375,811
Total	6,502,319	6,382,754
Idaho Power Company
Current Assets:
Cash and cash equivalents	143,491	165,460
Receivables:
Customer	99,143	77,178
Other	14,903	7,206
Income taxes receivable	0	11,829
Accrued unbilled revenues	52,926	69,318
Materials and supplies (at average cost)	57,513	54,987
Fuel stock (at average cost)	59,913	47,979
Prepayments	14,041	16,374
Current regulatory assets	43,811	48,707
Other	916	3,655
Total current assets	486,657	502,693
Investments	76,522	90,019
Property, Plant and Equipment:
Utility plant in service	6,206,105	6,103,856
Accumulated provision for depreciation	(2,284,787)	(2,210,781)
Utility plant in service - net	3,921,318	3,893,075
Construction work in progress	533,424	480,259
Utility plant held for future use	4,689	4,751
Property, plant and equipment - net	4,459,431	4,378,085
Other Assets:
Company-owned life insurance	58,790	59,852
Regulatory assets	1,210,924	1,165,467
Other	57,400	58,284
Total other assets	1,327,114	1,283,603
Total	6,349,724	6,254,400
Current Liabilities:
Accounts payable	84,142	110,597
Accounts payable to affiliates	2,158	2,088
Taxes accrued	34,273	11,750
Interest accrued	20,663	23,622
Accrued compensation	43,507	54,910
Current regulatory liabilities	44,890	25,883
Advances from customers	31,342	20,037
Other	12,116	10,198
Total current liabilities	273,091	259,085
Other Liabilities:
Deferred income taxes	734,355	753,239
Regulatory liabilities	770,034	738,994
Pension and other postretirement benefits	410,799	431,475
Other	44,326	42,380
Total other liabilities	1,959,514	1,966,088
Long-Term Debt	1,836,395	1,834,788
Commitments and Contingencies
Equity:
Common stock	97,877	97,877
Premium on capital stock	712,258	712,258
Capital stock expense	(2,097)	(2,097)
Retained earnings	1,494,066	1,409,245
Accumulated other comprehensive loss	(21,380)	(22,844)
Total equity	2,280,724	2,194,439
Total capitalization	4,117,119	4,029,227
Total	$ 6,349,724	$ 6,254,400

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss, Current	$ 1,413	$ 1,725
Allowance for Doubtful Other Receivables, Current	$ 319	$ 264
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,420,000	50,420,000
Treasury Stock, Shares	22,641	27,000
Idaho Power Company
Accounts Receivable, Allowance for Credit Loss, Current	$ 1,413	$ 1,725
Allowance for Doubtful Other Receivables, Current	$ 319	$ 264
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

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities:
Net Income	$ 186,255	$ 201,294
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	129,393	125,966
Deferred income taxes and investment tax credits	(7,399)	(19,497)
Changes in regulatory assets and liabilities	22,549	51,173
Pension and postretirement benefit plan expense	20,857	21,033
Contributions to pension and postretirement benefit plans	(46,001)	(45,236)
Earnings of equity-method investments	(9,545)	(12,218)
Distributions from equity-method investments	19,000	21,750
Allowance for equity funds used during construction	(19,857)	(18,065)
Other non-cash adjustments to net income, net	5,785	6,866
Change in:
Accounts receivable	(24,798)	(12,976)
Accounts payable and other accrued liabilities	(31,645)	(6,497)
Taxes accrued/receivable	45,600	44,869
Other current assets	3,618	12,616
Other current liabilities	(3,941)	1,619
Other assets	(3,477)	(5,504)
Other liabilities	621	(1,250)
Net cash provided by operating activities	287,015	365,943
Investing Activities:
Additions to property, plant and equipment	(198,871)	(197,975)
Payments received from transmission project joint funding partners	1,709	21,046
Proceeds from the sale of emission allowances and renewable energy certificates	4,049	2,562
Investments in affordable housing	2,687	0
Purchase of equity securities	(682)	(1,172)
Proceeds from the sale of equity securities	3,827	3,772
Other	72	1,288
Net cash used in investing activities	(192,583)	(170,479)
Financing Activities:
Issuance of long-term debt	166,100	220,000
Retirement of long-term debt	166,100	130,000
Dividends on common stock	(95,871)	(89,674)
Acquisition of treasury stock	(4,120)	(3,614)
Make-whole premium on retirement of long-term debt	0	4,607
Other	(1,362)	(2,968)
Net cash (used in) provided by financing activities	(101,353)	(10,863)
Net (decrease) increase in cash and cash equivalents	(6,921)	184,601
Cash and cash equivalents at beginning of the period	267,492	76,649
Cash and cash equivalents at end of the period	260,571	261,250
Supplemental Disclosure of Cash Flow Information:
Income taxes	5,225	0
Interest (net of amount capitalized)	65,835	61,832
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	23,214	22,715
Idaho Power Company
Operating Activities:
Net Income	180,740	196,687
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	128,945	125,516
Deferred income taxes and investment tax credits	(6,911)	(567)
Changes in regulatory assets and liabilities	22,549	51,174
Pension and postretirement benefit plan expense	20,841	21,018
Contributions to pension and postretirement benefit plans	(45,984)	(45,220)
Earnings of equity-method investments	(7,365)	(10,390)
Distributions from equity-method investments	18,150	20,900
Allowance for equity funds used during construction	(19,857)	(18,065)
Other non-cash adjustments to net income, net	(759)	(446)
Change in:
Accounts receivable	(24,760)	(13,089)
Accounts payable and other accrued liabilities	(31,563)	(61,682)
Taxes accrued/receivable	34,351	46,163
Other current assets	3,611	12,609
Other current liabilities	(3,881)	1,627
Other assets	(3,478)	(5,505)
Other liabilities	658	(1,155)
Net cash provided by operating activities	265,287	319,575
Investing Activities:
Additions to property, plant and equipment	(198,871)	(197,957)
Payments received from transmission project joint funding partners	1,709	21,046
Proceeds from the sale of emission allowances and renewable energy certificates	4,049	2,562
Purchase of equity securities	(682)	(1,172)
Proceeds from the sale of equity securities	3,827	3,772
Other	(85)	1,182
Net cash used in investing activities	(190,053)	(170,567)
Financing Activities:
Issuance of long-term debt	166,100	220,000
Retirement of long-term debt	166,100	130,000
Dividends on common stock	(95,919)	(89,857)
Make-whole premium on retirement of long-term debt	0	4,607
Other	(1,284)	(2,963)
Net cash (used in) provided by financing activities	(97,203)	(7,427)
Net (decrease) increase in cash and cash equivalents	(21,969)	141,581
Cash and cash equivalents at beginning of the period	165,460	44,646
Cash and cash equivalents at end of the period	143,491	186,227
Supplemental Disclosure of Cash Flow Information:
Income taxes	16,014	35,505
Interest (net of amount capitalized)	65,796	61,790
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 23,214	$ 22,715

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Equity $ in Thousands	USD ($)
Balance at beginning of period at Dec. 31, 2017	$ 857,207
Common Stock
Share-based Payment Arrangement, Expense	7,311
Treasury Stock Issued	(3,068)
Other common stock changes	65
Balance at end of period at Sep. 30, 2018	861,515
Balance at beginning of period at Dec. 31, 2017	1,426,528
Retained Earnings
Net Income Attributable to IDACORP, Inc.	200,661
Common stock dividends	(89,857)
Balance at end of period at Sep. 30, 2018	1,537,332
AOCI - Beginning Balance at Dec. 31, 2017	(30,964)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	2,164
AOCI - Ending Balance at Sep. 30, 2018	(28,800)
Balance at beginning of period at Dec. 31, 2017	(1,386)
Treasury Stock
Issued	3,068
Acquired	(3,614)
Balance at end of period at Sep. 30, 2018	(1,932)
Balance at beginning of period at Dec. 31, 2017	4,729
Noncontrolling Interests
Income attributable to noncontrolling interests	633
Balance at end of period at Sep. 30, 2018	5,362
Balance at beginning of period at Jun. 30, 2018	859,652
Common Stock
Share-based Payment Arrangement, Expense	1,900
Treasury Stock Issued	(61)
Other common stock changes	24
Balance at end of period at Sep. 30, 2018	861,515
Balance at beginning of period at Jun. 30, 2018	1,465,009
Retained Earnings
Net Income Attributable to IDACORP, Inc.	102,231
Common stock dividends	(29,908)
Balance at end of period at Sep. 30, 2018	1,537,332
AOCI - Beginning Balance at Jun. 30, 2018	(29,521)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	721
AOCI - Ending Balance at Sep. 30, 2018	(28,800)
Balance at beginning of period at Jun. 30, 2018	(1,936)
Treasury Stock
Issued	61
Acquired	(57)
Balance at end of period at Sep. 30, 2018	(1,932)
Balance at beginning of period at Jun. 30, 2018	5,002
Noncontrolling Interests
Income attributable to noncontrolling interests	360
Balance at end of period at Sep. 30, 2018	5,362
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,368,115
Noncontrolling Interests
Total equity at end of period	2,373,477
Total IDACORP, Inc. shareholders’ equity at end of period	2,370,360
Total equity at end of period	2,375,811
Balance at beginning of period at Dec. 31, 2018	863,593
Common Stock
Share-based Payment Arrangement, Expense	6,543
Treasury Stock Issued	(4,080)
Other common stock changes	75
Balance at end of period at Sep. 30, 2019	866,131
Balance at beginning of period at Dec. 31, 2018	1,531,543
Retained Earnings
Net Income Attributable to IDACORP, Inc.	185,718
Common stock dividends	(95,919)
Balance at end of period at Sep. 30, 2019	1,621,342
AOCI - Beginning Balance at Dec. 31, 2018	(22,844)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	1,464
AOCI - Ending Balance at Sep. 30, 2019	(21,380)
Balance at beginning of period at Dec. 31, 2018	(1,932)
Treasury Stock
Issued	4,080
Acquired	(4,120)
Balance at end of period at Sep. 30, 2019	(1,972)
Balance at beginning of period at Dec. 31, 2018	5,451
Noncontrolling Interests
Income attributable to noncontrolling interests	537
Balance at end of period at Sep. 30, 2019	5,988
Balance at beginning of period at Jun. 30, 2019	864,266
Common Stock
Share-based Payment Arrangement, Expense	1,877
Treasury Stock Issued	(33)
Other common stock changes	21
Balance at end of period at Sep. 30, 2019	866,131
Balance at beginning of period at Jun. 30, 2019	1,563,399
Retained Earnings
Net Income Attributable to IDACORP, Inc.	89,876
Common stock dividends	(31,933)
Balance at end of period at Sep. 30, 2019	1,621,342
AOCI - Beginning Balance at Jun. 30, 2019	(21,868)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	488
AOCI - Ending Balance at Sep. 30, 2019	(21,380)
Balance at beginning of period at Jun. 30, 2019	(1,992)
Treasury Stock
Issued	33
Acquired	(13)
Balance at end of period at Sep. 30, 2019	(1,972)
Balance at beginning of period at Jun. 30, 2019	5,646
Noncontrolling Interests
Income attributable to noncontrolling interests	342
Balance at end of period at Sep. 30, 2019	5,988
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,464,121
Noncontrolling Interests
Total equity at end of period	$ 2,470,109

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Equity (Parenthetical) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Dividends Declared Per Share of Common Stock	$ 0.63	$ 0.59	$ 1.89	$ 1.77

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:	9 Months Ended
	Sep. 30, 2019
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, Inc. (IDACORP) and Idaho Power Company (Idaho Power). Therefore, these Notes to 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 Federal Energy Regulatory Commission (FERC). Idaho Power is the parent of Idaho Energy Resources Co. (IERCo), a joint venturer in Bridger Coal Company (BCC), which mines and supplies coal to the Jim Bridger generating plant (Jim Bridger plant) owned in part by Idaho Power. IDACORP’s significant other wholly-owned subsidiaries include IDACORP Financial Services, Inc. (IFS), an investor in affordable housing and other real estate investments, and Ida-West Energy Company (Ida-West), an operator of small hydropower generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978 (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 enterprise 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 consolidated financial position as of September 30, 2019 , consolidated results of operations for the three and nine months ended September 30, 2019 and 2018 , and consolidated cash flows for the nine months ended September 30, 2019 and 2018 . 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 IDACORP’s and Idaho Power’s Annual Report on Form 10-K for the year ended December 31, 2018 (2018 Annual Report). The results of operations 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 financial condition and results of operations during the period in which such change occurred. Management Estimates Management makes estimates and assumptions when preparing financial statements in conformity with generally accepted accounting principles. These estimates and assumptions include 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 Pronouncement In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), intended to improve financial reporting on leasing transactions. The ASU requires lessees to recognize a right-of-use asset and lease liability on the balance sheet for most leases. In addition, the ASU revises the definition of a lease in regards to when an arrangement conveys the right to control the use of the identified asset under the arrangement. IDACORP and Idaho Power adopted ASU 2016-02 on January 1, 2019. The adoption did not have a material impact on their respective financial statements. Neither IDACORP nor Idaho Power has material agreements that meet the definition of a lease under ASU 2016-02. Recent Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , to provide financial statement users with more information about expected credit losses on financial instruments and other commitments. The ASU revises the incurred loss impairment methodology to reflect current expected credit losses and requires consideration of a broader range of information to estimate credit losses. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. IDACORP and Idaho Power are evaluating the impact of ASU 2016-13 on their respective financial statements, but the companies do not believe the adoption of the new standard will have a material impact on their respective financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , to provide guidance on implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the recognition of such implementation costs with the accounting for costs incurred to implement an internal-use software solution. However, the balance sheet line item for presentation of capitalized implementation costs for a cloud computing arrangement that is a service contract should be the same as that for the prepayment of fees related to the same arrangement, while capitalized implementation costs for internal-use software solutions are often included in property, plant, and equipment as an intangible asset. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. IDACORP and Idaho Power are evaluating the impact of ASU 2018-15 on their respective financial statements, but the companies do not believe the adoption of the new standard will have a material impact on their respective financial statements.

INCOME TAXES_

INCOME TAXES:	9 Months Ended
	Sep. 30, 2019
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 nine months ended September 30, 2019 and 2018 (in thousands): IDACORP Idaho Power 2019 2018 2019 2018 Income tax at statutory rates (federal and state) $ 54,626 $ 55,219 $ 53,496 $ 54,400 First mortgage bond redemption costs — (1,261 ) — (1,261 ) Excess deferred income tax reversal (4,123 ) (6,140 ) (4,123 ) (6,140 ) Remeasurement of deferred taxes — (5,411 ) — (5,664 ) Other (1) (23,997 ) (28,541 ) (22,282 ) (26,679 ) Income tax expense $ 26,506 $ 13,866 $ 27,091 $ 14,656 Effective tax rate 12.5 % 6.5 % 13.0 % 6.9 % (1) "Other" is primarily comprised of the net tax effect of Idaho Power's regulatory flow-through tax adjustments. The increase in income tax expense for the nine months ended September 30, 2019 , compared with the same period in 2018 , was primarily due to the tax deduction for first mortgage bond redemption costs incurred in the second quarter of 2018, the remeasurement of deferred taxes in the third quarter of 2018 due to income tax reform, lower excess deferred income tax reversal amounts, and other plant-related income tax return adjustments. On a net basis, Idaho Power’s estimate of its annual 2019 regulatory flow-through tax adjustments is comparable to 2018 .

REGULATORY MATTERS_

REGULATORY MATTERS:	9 Months Ended
	Sep. 30, 2019
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 orders from the Idaho Public Utilities Commission (IPUC) and Public Utility Commission of Oregon (OPUC). The commissions approve settlement stipulations that generally provide for cost recovery and an authorized rate of return on their respective Idaho-jurisdiction and Oregon-jurisdiction rate bases. Idaho Power's most recent general rate cases in Idaho and Oregon were filed during 2011. In 2012, large single-issue rate cases for the Langley Gulch power plant resulted in the resetting of base rates in both Idaho and Oregon. In 2014, Idaho Power reset its base-rate power supply expenses in the Idaho jurisdiction for purposes of updating the collection of costs through retail rates, but without a resulting net increase in rates. The IPUC and OPUC have also approved smaller base rate changes in single issue cases subsequent to 2014. Between general rate cases, Idaho Power relies upon customer growth, a fixed cost adjustment mechanism, power cost adjustment mechanisms, tariff riders, and other mechanisms to reduce the impact of regulatory lag, which refers to the period of time between making an investment or incurring an expense and recovering that investment or expense and earning a return. Also, Idaho Power may seek approval for additions to rate base or changes to base rates through other regulatory proceedings outside of a general rate case. For more information on the Idaho and Oregon general rate cases and base rate adjustments, refer to Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2018 Annual Report. Idaho Settlement Stipulations In October 2014, the IPUC issued an order approving an extension, with modifications, of the terms of a December 2011 Idaho settlement stipulation for the period from 2015 through 2019, or until the terms are otherwise modified or terminated by order of the IPUC (October 2014 Idaho Earnings Support and Sharing Settlement Stipulation). A May 2018 Idaho settlement stipulation related to tax reform (May 2018 Idaho Tax Reform Settlement Stipulation) provides for the extension of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation beyond the initial termination date of December 31, 2019, with modified terms related to the accumulated deferred investment tax credits (ADITC) and revenue sharing mechanism to become effective beginning January 1, 2020. The October 2014 Idaho Earnings Support and Sharing Settlement Stipulation and the May 2018 Idaho Tax Reform Settlement Stipulation are described in Note 3 - "Regulatory Matters" to the consolidated financial statements included in the 2018 Annual Report and include provisions for the accelerated amortization of ADITC to help achieve a minimum 9.5 percent ( 9.4 percent after 2019) return on year-end equity in the Idaho jurisdiction (Idaho ROE). The settlement stipulations also provide for the potential sharing between Idaho Power and Idaho customers of Idaho-jurisdictional earnings in excess of 10.0 percent of Idaho ROE. Based on its estimate of full-year 2019 Idaho ROE, in both the third quarter and first nine months of 2019, Idaho Power recorded no additional ADITC amortization or provision against current revenues for sharing of earnings with customers for 2019 under the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. Accordingly, at September 30, 2019, the full $45 million of additional ADITC remains available for future use under the terms of the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation. Idaho Power recorded a $1.5 million provision against revenues for sharing of earnings with customers during the third quarter of 2018, based on its then-current estimate of full-year 2018 Idaho ROE. Idaho 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 May 2019, the IPUC approved a $50.1 million net decrease in Idaho-jurisdiction power cost adjustment (PCA) revenues, effective for the 2019-2020 PCA collection period from June 1, 2019 to May 31, 2020. The net decrease in PCA revenues reflects reduced power supply costs due to higher-than-expected wholesale energy sales and positive results from natural gas hedging activities, which combined to reduce actual net power supply costs for the 2018-2019 PCA year (April 2018 through March 2019). The net decrease in PCA revenues for the 2019-2020 PCA collection period also includes a $5.0 million credit to customers for sharing of 2018 earnings under the October 2014 Idaho Earnings Support and Sharing Settlement Stipulation and a $2.7 million credit for income tax reform benefits related to Idaho Power's open access transmission tariff (OATT) rate under the May 2018 Idaho Tax Reform Settlement Stipulation. In addition, the net decrease in PCA revenues reflects benefits from Idaho Power's participation in the energy imbalance market implemented in the western United States (Western EIM). Previously, in May 2018, the IPUC issued an order approving a $30.4 million net decrease in PCA rates, effective for the 2018-2019 PCA collection period from June 1, 2018, to May 31, 2019. The net decrease in PCA rates included a $7.8 million one-time benefit for income tax savings from January 1, 2018 to May 31, 2018, as well as those related to Idaho Power's OATT rate. The remaining net decrease in PCA rates for the 2018-2019 PCA collection period was primarily due to better-than-expected actual water conditions for the 2017-2018 PCA year (April 2017 through March 2018), which resulted in additional low-cost hydropower being available to reduce net power supply costs. Idaho Fixed Cost Adjustment Mechanism The Idaho jurisdiction fixed cost adjustment (FCA) mechanism, applicable to Idaho residential and small general service 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. Any annual increase in the FCA recovery may be capped at 3 percent of base revenue at the discretion of the IPUC, with any excess deferred for collection in a subsequent year. In May 2019, the IPUC approved an increase of $19.2 million in recovery from the FCA from $15.6 million to $34.8 million , with new rates effective for the period from June 1, 2019 to May 31, 2020. Previously, in May 2018, the IPUC issued an order approving a decrease of $19.4 million in the FCA from $35.0 million to $15.6 million , with rates effective for the period from June 1, 2018 to May 31, 2019. Valmy Exit Agreement and Base Rate Adjustment Approval Request In February 2019, Idaho Power reached an agreement with NV Energy that facilitates the planned end of Idaho Power's participation in coal-fired operations at units 1 and 2 of its jointly-owned North Valmy coal-fired power plant (Valmy Plant) in 2019 and 2025, respectively. In May 2019, the IPUC issued an order approving the Valmy Plant agreement and allowing Idaho Power to recover through customer rates the $1.2 million incremental annual levelized revenue requirement associated with required Valmy Plant investments and other exit costs, effective June 1, 2019 through December 31, 2028. In October 2019, the OPUC approved the Valmy Plant agreement and authorized Idaho Power to adjust customer rates in Oregon, effective January 1, 2020, to reflect a decrease in the annual levelized revenue requirement of $3.2 million

Long-Term Debt (Notes)

Long-Term Debt (Notes)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Long-term Debt [Text Block]	LONG-TERM DEBT Pollution Control Tax-Exempt Bonds In August 2019, Idaho Power purchased and remarketed two of its outstanding series of pollution control tax-exempt bonds, one in the aggregate principal amount of $49.8 million issued in 2003 by Humboldt County, Nevada and due in 2024, and the other in the aggregate principal amount of $116.3 million issued in 2006 by Sweetwater County, Wyoming and due in 2026. The bonds were remarketed with substantially the same terms, but with lower term interest rates. The term interest rate of the series due in 2024 decreased from 5.15 percent to 1.45 percent and the term interest rate of the series due in 2026 decreased from 5.25 percent to 1.70 percent .

REVENUES_ (Notes)

REVENUES: (Notes)	9 Months Ended
	Sep. 30, 2019
Revenues [Abstract]
Revenue from Contract with Customer [Text Block]	REVENUES The following table provides a summary of electric utility operating revenues for IDACORP and Idaho Power for the three and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Electric utility operating revenues: Revenue from contracts with customers $ 367,101 $ 398,798 $ 1,010,281 $ 1,019,668 Alternative revenue programs and other revenues 17,927 8,557 40,293 35,847 Total electric utility operating revenues $ 385,028 $ 407,355 $ 1,050,574 $ 1,055,515 Revenues from Contracts with Customers The following table presents revenues from contracts with customers disaggregated by revenue source for the three and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Revenues from contracts with customers: Retail revenues: Residential (includes $6,446, $4,789, $24,988 and $23,841, respectively, related to the FCA) (1) $ 133,550 $ 137,177 $ 388,566 $ 393,014 Commercial (includes $330, $305, $1,022, and $958, respectively, related to the FCA) (1) 80,304 85,936 224,382 237,127 Industrial 47,122 50,292 138,222 144,951 Irrigation 82,659 88,934 132,613 154,406 Provision for sharing — (1,500 ) — (1,500 ) Deferred revenue related to HCC relicensing AFUDC (2) (2,815 ) (2,815 ) (6,861 ) (6,861 ) Total retail revenues 340,820 358,024 876,922 921,137 Less: FCA mechanism revenues (1) (6,776 ) (5,094 ) (26,010 ) (24,799 ) Wholesale energy sales 5,321 12,408 68,693 35,093 Transmission wheeling-related revenues 12,498 17,640 40,743 43,839 Energy efficiency program revenues 8,439 9,309 30,008 25,708 Other revenues from contracts with customers 6,799 6,511 19,925 18,690 Total revenues from contracts with customers $ 367,101 $ 398,798 $ 1,010,281 $ 1,019,668 (1) The FCA mechanism is an alternative revenue program in the Idaho jurisdiction and does not represent revenue from contracts with customers. (2) As part of its January 30, 2009, general rate case order, the IPUC is allowing Idaho Power to recover a portion of the allowance for funds used during construction (AFUDC) on construction work in progress related to the Hells Canyon Complex (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 Idaho FCA mechanism, which may increase or decrease tariff-based customer rates. The Idaho 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 billed to customers, Idaho Power records such amounts as recovery of the associated regulatory asset or liability and not as revenues. Derivative revenues include gains from settled electricity swaps and sales of electricity under forward sales contracts that are bundled with renewable energy credits. Related to these forward sales, Idaho Power simultaneously enters into forward purchases of electricity for the same quantity at the same location, which are recorded in purchased power on the condensed consolidated statements of income. For more information on settled electricity swaps, see Note 11 - "Derivatives." The table below presents the FCA mechanism revenues and other revenues for the three and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Alternative revenue programs and other revenues: FCA mechanism revenues $ 6,776 5,094 $ 26,010 $ 24,799 Derivative revenues 11,151 3,463 14,283 11,048 Total alternative revenue programs and other revenues $ 17,927 $ 8,557 $ 40,293 $ 35,847

COMMON STOCK_

COMMON STOCK:	9 Months Ended
	Sep. 30, 2019
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock	COMMON STOCK IDACORP Common Stock During the nine months ended September 30, 2019 , IDACORP granted 70,419 restricted stock unit awards to employees and issued 6,396 shares of common stock to directors, but made no original issuances of shares of common stock pursuant to the IDACORP, Inc. 2000 Long-Term Incentive and Compensation Plan. As directed by IDACORP, plan administrators of the IDACORP, Inc. Dividend Reinvestment and Stock Purchase Plan and Idaho Power Company Employee Savings Plan used market purchases of IDACORP common stock, as opposed to original issuance of common stock from IDACORP, to acquire shares of IDACORP common stock for the plans. However, IDACORP may determine at any time to use original issuances of common stock under those plans. 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 Revised Code of Conduct. A covenant under IDACORP’s credit facility and Idaho Power’s credit facility requires IDACORP and Idaho Power to maintain leverage ratios of consolidated indebtedness to consolidated total capitalization, as defined therein, of no more than 65 percent at the end of each fiscal quarter. At September 30, 2019 , the leverage ratios for IDACORP and Idaho Power were 43 percent and 45 percent , respectively. Based on these restrictions, IDACORP’s and Idaho Power’s dividends were limited to $1.5 billion and $1.3 billion , respectively, at September 30, 2019 . 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 September 30, 2019 , IDACORP and Idaho Power were in compliance with those financial covenants. Idaho Power’s Revised 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 September 30, 2019 , Idaho Power's common equity capital was 55 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 (FPA) prohibits the payment of dividends from "capital accounts." The term "capital account" is undefined in the FPA 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:	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018 (in thousands, except for per share amounts). Three months ended Nine months ended 2019 2018 2019 2018 Numerator: Net income attributable to IDACORP, Inc. $ 89,876 $ 102,231 $ 185,718 $ 200,661 Denominator: Weighted-average common shares outstanding - basic 50,499 50,434 50,502 50,431 Effect of dilutive securities 59 131 26 72 Weighted-average common shares outstanding - diluted 50,558 50,565 50,528 50,503 Basic earnings per share $ 1.78 $ 2.03 $ 3.68 $ 3.98 Diluted earnings per share $ 1.78 $ 2.02 $ 3.68 $ 3.97

COMMITMENTS_

COMMITMENTS:	9 Months Ended
	Sep. 30, 2019
Disclosure Text Block Supplement [Abstract]
Commitments	COMMITMENTS Purchase Obligations During the nine months ended September 30, 2019 , 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 2018 Annual Report, except that Idaho Power entered into four new replacement contracts for expiring power purchase agreements with hydropower PURPA-qualifying facilities and one new agreement with a solar PURPA-qualifying facility, which increased Idaho Power's contractual purchase obligations by approximately $24 million over the 20-year terms of the contracts. Also, in March 2019, Idaho Power signed a 20-year power purchase agreement, pending approval by the IPUC and OPUC, to purchase the output from a planned 120-megawatt solar facility. If approved, the agreement would increase contractual obligations by $136 million over the 20-year term. In October 2019, Idaho Power exercised its right under the power purchase agreement to negotiate during the fourth quarter of this year for the acquisition by Idaho Power or its affiliates of the right to own the planned 120-megawatt solar facility. If an acquisition agreement is reached and the power purchase agreement is approved by the IPUC and OPUC, it could affect the net impact on Idaho Power or its affiliates of the contractual obligation related to the 20-year power purchase agreement described above. Guarantees Through a self-bonding mechanism, 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, was $58.3 million at September 30, 2019 , representing IERCo's one-third share of BCC's total reclamation obligation of $175.0 million . BCC has a reclamation trust fund set aside specifically for the purpose of paying these reclamation costs. At September 30, 2019 , the value of BCC's reclamation trust fund was $126.4 million . During the nine months ended September 30, 2019 , the reclamation trust fund made no distributions for reclamation activity costs associated with the BCC surface mine. 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. In May 2019, the state of Wyoming enacted legislation that limits a mine operator's maximum amount of self-bonding. Idaho Power and the co-owners of BCC have until December 2020 to comply with the new regulations, which would reduce the portion of Idaho Power's guarantee of reclamation activities and obligations at BCC that Idaho Power is allowed to self-bond. As of the date of this report, Idaho Power believes the cost of any insurance, third-party assurance, or additional collateral that might be required for this guarantee due to the new law would be immaterial to the companies' consolidated financial statements. 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 September 30, 2019 , management believes the likelihood is remote that IDACORP or Idaho Power would be required to perform under such indemnification provisions or otherwise incur any significant losses with respect to such indemnification obligations. Neither IDACORP nor Idaho Power has recorded any liability on their respective condensed consolidated balance sheets with respect to these indemnification obligations.

CONTINGENCIES_

CONTINGENCIES:	9 Months Ended
	Sep. 30, 2019
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 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 generation, 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. In recent years, Idaho Power has regularly received claims by both 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 consolidated financial statements. Idaho Power is also actively monitoring various pending 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 these regulations.

BENEFIT PLANS_

BENEFIT PLANS:	9 Months Ended
	Sep. 30, 2019
Retirement Benefits, Description [Abstract]
Benefit Plans	BENEFIT PLANS Idaho Power has a noncontributory defined benefit pension plan (pension plan) and two nonqualified defined benefit plans for certain senior management employees called the Security Plan for Senior Management Employees I and Security Plan for Senior Management Employees II (together, 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 September 30, 2019 and 2018 (in thousands). Pension Plan SMSP Postretirement Total 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 8,516 $ 8,892 $ (46 ) $ (79 ) $ 213 $ 263 $ 8,683 $ 9,076 Interest cost 10,578 9,761 1,143 1,062 748 660 12,469 11,483 Expected return on plan assets (12,156 ) (13,117 ) — — (555 ) (616 ) (12,711 ) (13,733 ) Amortization of prior service cost 1 1 24 24 11 11 36 36 Amortization of net loss 3,391 3,381 634 947 — — 4,025 4,328 Net periodic benefit cost 10,330 8,918 1,755 1,954 417 318 12,502 11,190 Regulatory deferral of net periodic benefit cost (1) (9,845 ) (8,498 ) — — — — (9,845 ) (8,498 ) Previously deferred pension costs recognized (1) 4,288 4,288 — — — — 4,288 4,288 Net periodic benefit cost recognized for financial reporting (1)(2) $ 4,773 $ 4,708 $ 1,755 $ 1,954 $ 417 $ 318 $ 6,945 $ 6,980 (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, $4.2 million and $4.1 million , respectively, were recognized in "Other operations and maintenance" and $2.7 million and $2.9 million , respectively, were recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the three months ended September 30, 2019 and 2018 . The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the nine months ended September 30, 2019 and 2018 (in thousands). Pension Plan SMSP Postretirement Total 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 25,546 $ 28,377 $ (136 ) $ (237 ) $ 640 $ 789 $ 26,050 $ 28,929 Interest cost 31,734 29,125 3,432 3,186 2,242 1,982 37,408 34,293 Expected return on plan assets (36,467 ) (39,227 ) — — (1,665 ) (1,850 ) (38,132 ) (41,077 ) Amortization of prior service cost 4 4 72 73 35 35 111 112 Amortization of net loss 10,173 10,169 1,900 2,841 — — 12,073 13,010 Net periodic benefit cost 30,990 28,448 5,268 5,863 1,252 956 37,510 35,267 Regulatory deferral of net periodic benefit cost (1) (29,534 ) (27,114 ) — — — — (29,534 ) (27,114 ) Previously deferred pension costs recognized (1) 12,865 12,865 — — — — 12,865 12,865 Net periodic benefit cost recognized for financial reporting (1)(2) $ 14,321 $ 14,199 $ 5,268 $ 5,863 $ 1,252 $ 956 $ 20,841 $ 21,018 (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, $12.6 million and $12.3 million , respectively, were recognized in "Other operations and maintenance" and $8.2 million and $8.7 million , respectively, were recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the nine months ended September 30, 2019 and 2018 . Idaho Power has no minimum contribution requirement to its defined benefit pension plan in 2019. However, during the nine months ended September 30, 2019 , Idaho Power made $40 million of discretionary contributions to its defined benefit pension plan, in a continued effort to balance the regulatory collection of these expenditures with the amount and timing of contributions and 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:	9 Months Ended
	Sep. 30, 2019
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 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 and nine months ended September 30, 2019 and 2018 (in thousands). Gain/(Loss) on Derivatives Recognized in Income (1) Location of Realized Gain/(Loss) on Derivatives Recognized in Income Three months ended Nine months ended 2019 2018 2019 2018 Financial swaps Operating revenues $ 3,693 $ (98 ) $ 904 $ 168 Financial swaps Purchased power (2,981 ) 6,793 (2,294 ) 6,604 Financial swaps Fuel expense (815 ) 95 11,587 (704 ) Financial swaps Other operations and maintenance — 47 — 85 Forward contracts Operating revenues 106 20 170 22 Forward contracts Purchased power (106 ) (20 ) (170 ) (40 ) Forward contracts Fuel expense 191 6 607 30 (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 operations and maintenance 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 September 30, 2019 , 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, physical gas, and financial transactions are generally under standardized industry contracts. These contracts 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 Idaho Power derivative instruments contain provisions that require Idaho Power's unsecured debt to maintain an investment grade credit rating from Moody's Investors Service and Standard & Poor's Ratings Services. If Idaho Power's unsecured debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at September 30, 2019 , was $2.8 million . Idaho Power posted $1.5 million cash collateral related to this amount. If the credit-risk-related contingent features underlying these agreements were triggered on September 30, 2019 , Idaho Power would have been required to pay or post collateral to its counterparties up to an additional $5.9 million to cover the 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 September 30, 2019 , and December 31, 2018 (in thousands). Asset Derivatives Liability Derivatives Balance Sheet Location Gross Fair Value Amounts Offset Net Assets Gross Fair Value Amounts Offset Net Liabilities September 30, 2019 Current: Financial swaps Other current assets $ 1,968 $ (1,052 ) $ 916 $ 1,052 $ (1,052 ) $ — Financial swaps Other current liabilities 72 (72 ) — 1,610 (72 ) 1,538 Long-term: Financial swaps Other liabilities 31 (31 ) — 95 (31 ) 64 Total $ 2,071 $ (1,155 ) $ 916 $ 2,757 $ (1,155 ) $ 1,602 December 31, 2018 Current: Financial swaps Other current assets $ 4,639 $ (984 ) (1) $ 3,655 $ 938 $ (938 ) $ — Financial swaps Other current liabilities — — — 806 — 806 Forward contracts Other current liabilities — — — 104 — 104 Long-term: Financial swaps Other assets — — — 64 — 64 Total $ 4,639 $ (984 ) $ 3,655 $ 1,912 $ (938 ) $ 974 (1) Current asset derivative amounts offset include $45 thousand of collateral payable for the period ending December 31, 2018 . The table below presents the volumes of derivative commodity forward contracts and swaps outstanding at September 30, 2019 and 2018 (in thousands of units). September 30, Commodity Units 2019 2018 Electricity purchases MWh 109 84 Electricity sales MWh 10 33 Natural gas purchases MMBtu 7,798 8,754 Natural gas sales MMBtu — 308 Diesel purchases Gallons — 220

FAIR VALUE MEASUREMENTS_

FAIR VALUE MEASUREMENTS:	9 Months Ended
	Sep. 30, 2019
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 are based on quoted market prices adjusted for location using corroborated, observable market data. • 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. An item recorded at fair value is reclassified among levels when changes in the nature of valuation inputs cause the item to no longer meet the criteria for the level in which it was previously categorized. There were no transfers between levels or material changes in valuation techniques or inputs during the nine months ended September 30, 2019 . The table below presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2019 , and December 31, 2018 (in thousands). September 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds IDACORP (1) $ 63,390 $ — $ — $ 63,390 $ 97,833 $ — $ — $ 97,833 Idaho Power 30,424 — — 30,424 79,228 — — 79,228 Derivatives 916 — — 916 3,655 — — 3,655 Equity securities 33,776 — — 33,776 36,488 — — 36,488 Liabilities: Derivatives 1,602 — — 1,602 870 104 — 974 (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 derivatives are valued on the Intercontinental Exchange (ICE) with quoted prices in an active market. 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 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 September 30, 2019 , and December 31, 2018 , using available market information and appropriate valuation methodologies (in thousands). September 30, 2019 December 31, 2018 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value IDACORP Assets: Notes receivable (1) $ 3,804 $ 3,804 $ 3,804 $ 3,804 Liabilities: Long-term debt (1) 1,836,395 2,126,459 1,834,788 1,942,773 Idaho Power Liabilities: Long-term debt (1) 1,836,395 2,126,459 1,834,788 1,942,773 (1) Notes receivable and long-term debt are categorized as Level 3 and Level 2, respectively, of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements." Notes receivable are related to Ida-West and are valued based on unobservable inputs, including discounted cash flows, which are partially based on forecasted hydropower conditions. 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:	9 Months Ended
	Sep. 30, 2019
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 generation, 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 joint venture. 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 is comprised of IFS’s investments in affordable housing developments and historic rehabilitation 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 Operations All Other Eliminations Consolidated Total Three months ended September 30, 2019: Revenues $ 385,028 $ 1,292 $ — $ 386,320 Net income attributable to IDACORP, Inc. 87,979 1,897 — 89,876 Total assets as of September 30, 2019 6,349,724 196,491 (43,896 ) 6,502,319 Three months ended September 30, 2018: Revenues $ 407,355 $ 1,446 $ — $ 408,801 Net income attributable to IDACORP, Inc. 100,194 2,037 — 102,231 Nine months ended September 30, 2019: Revenues $ 1,050,574 $ 2,961 $ — $ 1,053,535 Net income attributable to IDACORP, Inc. 180,740 4,978 — 185,718 Nine months ended September 30, 2018: Revenues $ 1,055,515 $ 3,345 $ — $ 1,058,860 Net income attributable to IDACORP, Inc. 196,687 3,974 — 200,661

CHANGES IN ACCUMULATED OTHER CO

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME: CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME:	9 Months Ended
	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Income [Text Block]	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME The table below presents changes in components of accumulated other comprehensive income (AOCI), net of tax, during the three and nine months ended September 30, 2019 and 2018 (in thousands). Items in parentheses indicate charges to AOCI. Defined Benefit Pension Items Three months ended Nine months ended 2019 2018 2019 2018 Balance at beginning of period $ (21,868 ) $ (29,521 ) $ (22,844 ) $ (30,964 ) Amounts reclassified out of AOCI 488 721 1,464 2,164 Balance at end of period $ (21,380 ) $ (28,800 ) $ (21,380 ) $ (28,800 ) The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified during the three and nine months ended September 30, 2019 and 2018 (in thousands). Items in parentheses indicate increases to net income. Amount Reclassified from AOCI Details About AOCI Three months ended Nine months ended 2019 2018 2019 2018 Amortization of defined benefit pension items (1) Prior service cost $ 24 $ 24 $ 72 $ 73 Net loss 634 947 1,900 2,841 Total before tax 658 971 1,972 2,914 Tax benefit (2) (170 ) (250 ) (508 ) (750 ) Total reclassification for the period, net of tax $ 488 $ 721 $ 1,464 $ 2,164 (1) Amortization of these items is included in IDACORP's condensed consolidated income statements 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)	9 Months Ended
	Sep. 30, 2019
Changes in Idaho Power Retained Earnings
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 and nine months ended September 30, 2019 and 2018 (in thousands). Three months ended Nine months ended 2019 2018 2019 2018 Balance at beginning of period $ 1,438,019 $ 1,345,246 $ 1,409,245 $ 1,308,702 Net income 87,979 100,194 180,740 196,687 Dividends to parent (31,932 ) (29,908 ) (95,919 ) (89,857 ) Balance at end of period $ 1,494,066 $ 1,415,532 $ 1,494,066 $ 1,415,532

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Organization, Consolidation, Presentation, and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Revenue Recognition, Policy	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 billed to customers, Idaho Power records such amounts as recovery of the associated regulatory asset or liability and not as revenues.
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 Federal Energy Regulatory Commission (FERC). Idaho Power is the parent of Idaho Energy Resources Co. (IERCo), a joint venturer in Bridger Coal Company (BCC), which mines and supplies coal to the Jim Bridger generating plant (Jim Bridger plant) owned in part by Idaho Power. IDACORP’s significant other wholly-owned subsidiaries include IDACORP Financial Services, Inc. (IFS), an investor in affordable housing and other real estate investments, and Ida-West Energy Company (Ida-West), an operator of small hydropower generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978 (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.
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 consolidated financial position as of September 30, 2019 , consolidated results of operations for the three and nine months ended September 30, 2019 and 2018 , and consolidated cash flows for the nine months ended September 30, 2019 and 2018 . 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 IDACORP’s and Idaho Power’s Annual Report on Form 10-K for the year ended December 31, 2018
Management Estimates	Management makes estimates and assumptions when preparing financial statements in conformity with generally accepted accounting principles. These estimates and assumptions include 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.
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.
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 are based on quoted market prices adjusted for location using corroborated, observable market data. • 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.
New Accounting Pronouncements	New and Recently Adopted Accounting Pronouncements Recently Adopted Accounting Pronouncement In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), intended to improve financial reporting on leasing transactions. The ASU requires lessees to recognize a right-of-use asset and lease liability on the balance sheet for most leases. In addition, the ASU revises the definition of a lease in regards to when an arrangement conveys the right to control the use of the identified asset under the arrangement. IDACORP and Idaho Power adopted ASU 2016-02 on January 1, 2019. The adoption did not have a material impact on their respective financial statements. Neither IDACORP nor Idaho Power has material agreements that meet the definition of a lease under ASU 2016-02. Recent Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , to provide financial statement users with more information about expected credit losses on financial instruments and other commitments. The ASU revises the incurred loss impairment methodology to reflect current expected credit losses and requires consideration of a broader range of information to estimate credit losses. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. IDACORP and Idaho Power are evaluating the impact of ASU 2016-13 on their respective financial statements, but the companies do not believe the adoption of the new standard will have a material impact on their respective financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , to provide guidance on implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the recognition of such implementation costs with the accounting for costs incurred to implement an internal-use software solution. However, the balance sheet line item for presentation of capitalized implementation costs for a cloud computing arrangement that is a service contract should be the same as that for the prepayment of fees related to the same arrangement, while capitalized implementation costs for internal-use software solutions are often included in property, plant, and equipment as an intangible asset. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. IDACORP and Idaho Power are evaluating the impact of ASU 2018-15 on their respective financial statements, but the companies do not believe the adoption of the new standard will have a material impact on their respective financial statements.
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. All of Idaho Power's derivative instruments have been entered into for the purpose of 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.
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 operations and maintenance 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 generation, 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 joint venture. 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 is comprised of IFS’s investments in affordable housing developments and historic rehabilitation projects, Ida-West’s joint venture investments in small hydropower generation projects, and IDACORP’s holding company expenses.

REVENUES_ (Policies)

REVENUES: (Policies)	9 Months Ended
	Sep. 30, 2019
Revenues [Abstract]
Revenue Recognition, Policy	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 billed to customers, Idaho Power records such amounts as recovery of the associated regulatory asset or liability and not as revenues.

INCOME TAXES_ Level 3 (Tables)

INCOME TAXES: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
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 nine months ended September 30, 2019 and 2018 (in thousands): IDACORP Idaho Power 2019 2018 2019 2018 Income tax at statutory rates (federal and state) $ 54,626 $ 55,219 $ 53,496 $ 54,400 First mortgage bond redemption costs — (1,261 ) — (1,261 ) Excess deferred income tax reversal (4,123 ) (6,140 ) (4,123 ) (6,140 ) Remeasurement of deferred taxes — (5,411 ) — (5,664 ) Other (1) (23,997 ) (28,541 ) (22,282 ) (26,679 ) Income tax expense $ 26,506 $ 13,866 $ 27,091 $ 14,656 Effective tax rate 12.5 % 6.5 % 13.0 % 6.9 % (1) "Other" is primarily comprised of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.

REVENUES_ Electric utility oper

REVENUES: Electric utility operating revenues (Tables)	9 Months Ended
	Sep. 30, 2019
Electric utility operating revenues [Line Items]
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 and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Electric utility operating revenues: Revenue from contracts with customers $ 367,101 $ 398,798 $ 1,010,281 $ 1,019,668 Alternative revenue programs and other revenues 17,927 8,557 40,293 35,847 Total electric utility operating revenues $ 385,028 $ 407,355 $ 1,050,574 $ 1,055,515

REVENUES_ (Tables)

REVENUES: (Tables)	9 Months Ended
	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table presents revenues from contracts with customers disaggregated by revenue source for the three and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Revenues from contracts with customers: Retail revenues: Residential (includes $6,446, $4,789, $24,988 and $23,841, respectively, related to the FCA) (1) $ 133,550 $ 137,177 $ 388,566 $ 393,014 Commercial (includes $330, $305, $1,022, and $958, respectively, related to the FCA) (1) 80,304 85,936 224,382 237,127 Industrial 47,122 50,292 138,222 144,951 Irrigation 82,659 88,934 132,613 154,406 Provision for sharing — (1,500 ) — (1,500 ) Deferred revenue related to HCC relicensing AFUDC (2) (2,815 ) (2,815 ) (6,861 ) (6,861 ) Total retail revenues 340,820 358,024 876,922 921,137 Less: FCA mechanism revenues (1) (6,776 ) (5,094 ) (26,010 ) (24,799 ) Wholesale energy sales 5,321 12,408 68,693 35,093 Transmission wheeling-related revenues 12,498 17,640 40,743 43,839 Energy efficiency program revenues 8,439 9,309 30,008 25,708 Other revenues from contracts with customers 6,799 6,511 19,925 18,690 Total revenues from contracts with customers $ 367,101 $ 398,798 $ 1,010,281 $ 1,019,668 (1) The FCA mechanism is an alternative revenue program in the Idaho jurisdiction and does not represent revenue from contracts with customers. (2) As part of its January 30, 2009, general rate case order, the IPUC is allowing Idaho Power to recover a portion of the allowance for funds used during construction (AFUDC) on construction work in progress related to the Hells Canyon Complex (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_ Alternative revenue p

REVENUES: Alternative revenue program and other revenues (Tables)	9 Months Ended
	Sep. 30, 2019
Regulated Operations [Abstract]
Alternative revenue programs and other revenues [Table Text Block]	The table below presents the FCA mechanism revenues and other revenues for the three and nine months ended September 30 , 2019 and 2018 (in thousands): Three months ended Nine months ended 2019 2018 2019 2018 Alternative revenue programs and other revenues: FCA mechanism revenues $ 6,776 5,094 $ 26,010 $ 24,799 Derivative revenues 11,151 3,463 14,283 11,048 Total alternative revenue programs and other revenues $ 17,927 $ 8,557 $ 40,293 $ 35,847

EARNINGS PER SHARE_ Level 3 (Ta

EARNINGS PER SHARE: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share, Basic and Diluted [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 and nine months ended September 30, 2019 and 2018 (in thousands, except for per share amounts). Three months ended Nine months ended 2019 2018 2019 2018 Numerator: Net income attributable to IDACORP, Inc. $ 89,876 $ 102,231 $ 185,718 $ 200,661 Denominator: Weighted-average common shares outstanding - basic 50,499 50,434 50,502 50,431 Effect of dilutive securities 59 131 26 72 Weighted-average common shares outstanding - diluted 50,558 50,565 50,528 50,503 Basic earnings per share $ 1.78 $ 2.03 $ 3.68 $ 3.98 Diluted earnings per share $ 1.78 $ 2.02 $ 3.68 $ 3.97

BENEFIT PLANS_ Level 3 (Tables)

BENEFIT PLANS: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
Defined Benefit Plan Disclosure
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 September 30, 2019 and 2018 (in thousands). Pension Plan SMSP Postretirement Total 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 8,516 $ 8,892 $ (46 ) $ (79 ) $ 213 $ 263 $ 8,683 $ 9,076 Interest cost 10,578 9,761 1,143 1,062 748 660 12,469 11,483 Expected return on plan assets (12,156 ) (13,117 ) — — (555 ) (616 ) (12,711 ) (13,733 ) Amortization of prior service cost 1 1 24 24 11 11 36 36 Amortization of net loss 3,391 3,381 634 947 — — 4,025 4,328 Net periodic benefit cost 10,330 8,918 1,755 1,954 417 318 12,502 11,190 Regulatory deferral of net periodic benefit cost (1) (9,845 ) (8,498 ) — — — — (9,845 ) (8,498 ) Previously deferred pension costs recognized (1) 4,288 4,288 — — — — 4,288 4,288 Net periodic benefit cost recognized for financial reporting (1)(2) $ 4,773 $ 4,708 $ 1,755 $ 1,954 $ 417 $ 318 $ 6,945 $ 6,980 (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, $4.2 million and $4.1 million , respectively, were recognized in "Other operations and maintenance" and $2.7 million and $2.9 million , respectively, were recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the three months ended September 30, 2019 and 2018 . The table below shows the components of net periodic benefit costs for the pension, SMSP, and postretirement benefits plans for the nine months ended September 30, 2019 and 2018 (in thousands). Pension Plan SMSP Postretirement Total 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 25,546 $ 28,377 $ (136 ) $ (237 ) $ 640 $ 789 $ 26,050 $ 28,929 Interest cost 31,734 29,125 3,432 3,186 2,242 1,982 37,408 34,293 Expected return on plan assets (36,467 ) (39,227 ) — — (1,665 ) (1,850 ) (38,132 ) (41,077 ) Amortization of prior service cost 4 4 72 73 35 35 111 112 Amortization of net loss 10,173 10,169 1,900 2,841 — — 12,073 13,010 Net periodic benefit cost 30,990 28,448 5,268 5,863 1,252 956 37,510 35,267 Regulatory deferral of net periodic benefit cost (1) (29,534 ) (27,114 ) — — — — (29,534 ) (27,114 ) Previously deferred pension costs recognized (1) 12,865 12,865 — — — — 12,865 12,865 Net periodic benefit cost recognized for financial reporting (1)(2) $ 14,321 $ 14,199 $ 5,268 $ 5,863 $ 1,252 $ 956 $ 20,841 $ 21,018 (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, $12.6 million and $12.3 million , respectively, were recognized in "Other operations and maintenance" and $8.2 million and $8.7 million , respectively, were recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the nine months ended September 30, 2019 and 2018 .

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018 (in thousands). Gain/(Loss) on Derivatives Recognized in Income (1) Location of Realized Gain/(Loss) on Derivatives Recognized in Income Three months ended Nine months ended 2019 2018 2019 2018 Financial swaps Operating revenues $ 3,693 $ (98 ) $ 904 $ 168 Financial swaps Purchased power (2,981 ) 6,793 (2,294 ) 6,604 Financial swaps Fuel expense (815 ) 95 11,587 (704 ) Financial swaps Other operations and maintenance — 47 — 85 Forward contracts Operating revenues 106 20 170 22 Forward contracts Purchased power (106 ) (20 ) (170 ) (40 ) Forward contracts Fuel expense 191 6 607 30 (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 September 30, 2019 , and December 31, 2018 (in thousands). Asset Derivatives Liability Derivatives Balance Sheet Location Gross Fair Value Amounts Offset Net Assets Gross Fair Value Amounts Offset Net Liabilities September 30, 2019 Current: Financial swaps Other current assets $ 1,968 $ (1,052 ) $ 916 $ 1,052 $ (1,052 ) $ — Financial swaps Other current liabilities 72 (72 ) — 1,610 (72 ) 1,538 Long-term: Financial swaps Other liabilities 31 (31 ) — 95 (31 ) 64 Total $ 2,071 $ (1,155 ) $ 916 $ 2,757 $ (1,155 ) $ 1,602 December 31, 2018 Current: Financial swaps Other current assets $ 4,639 $ (984 ) (1) $ 3,655 $ 938 $ (938 ) $ — Financial swaps Other current liabilities — — — 806 — 806 Forward contracts Other current liabilities — — — 104 — 104 Long-term: Financial swaps Other assets — — — 64 — 64 Total $ 4,639 $ (984 ) $ 3,655 $ 1,912 $ (938 ) $ 974 (1) Current asset derivative amounts offset include $45 thousand of collateral payable for the period ending December 31, 2018 .
Schedule of Derivative Instruments	The table below presents the volumes of derivative commodity forward contracts and swaps outstanding at September 30, 2019 and 2018 (in thousands of units). September 30, Commodity Units 2019 2018 Electricity purchases MWh 109 84 Electricity sales MWh 10 33 Natural gas purchases MMBtu 7,798 8,754 Natural gas sales MMBtu — 308 Diesel purchases Gallons — 220

FAIR VALUE MEASUREMENTS_ Level

FAIR VALUE MEASUREMENTS: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The table below presents information about IDACORP’s and Idaho Power’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2019 , and December 31, 2018 (in thousands). September 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds IDACORP (1) $ 63,390 $ — $ — $ 63,390 $ 97,833 $ — $ — $ 97,833 Idaho Power 30,424 — — 30,424 79,228 — — 79,228 Derivatives 916 — — 916 3,655 — — 3,655 Equity securities 33,776 — — 33,776 36,488 — — 36,488 Liabilities: Derivatives 1,602 — — 1,602 870 104 — 974 (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 September 30, 2019 , and December 31, 2018 , using available market information and appropriate valuation methodologies (in thousands). September 30, 2019 December 31, 2018 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value IDACORP Assets: Notes receivable (1) $ 3,804 $ 3,804 $ 3,804 $ 3,804 Liabilities: Long-term debt (1) 1,836,395 2,126,459 1,834,788 1,942,773 Idaho Power Liabilities: Long-term debt (1) 1,836,395 2,126,459 1,834,788 1,942,773 (1) Notes receivable and long-term debt are categorized as Level 3 and Level 2, respectively, of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements."

SEGMENT INFORMATION_ Level 3 (T

SEGMENT INFORMATION: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
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 Operations All Other Eliminations Consolidated Total Three months ended September 30, 2019: Revenues $ 385,028 $ 1,292 $ — $ 386,320 Net income attributable to IDACORP, Inc. 87,979 1,897 — 89,876 Total assets as of September 30, 2019 6,349,724 196,491 (43,896 ) 6,502,319 Three months ended September 30, 2018: Revenues $ 407,355 $ 1,446 $ — $ 408,801 Net income attributable to IDACORP, Inc. 100,194 2,037 — 102,231 Nine months ended September 30, 2019: Revenues $ 1,050,574 $ 2,961 $ — $ 1,053,535 Net income attributable to IDACORP, Inc. 180,740 4,978 — 185,718 Nine months ended September 30, 2018: Revenues $ 1,055,515 $ 3,345 $ — $ 1,058,860 Net income attributable to IDACORP, Inc. 196,687 3,974 — 200,661

CHANGES IN ACCUMULATED OTHER _2

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME: Level 3 (Tables)	9 Months Ended
	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The table below presents changes in components of accumulated other comprehensive income (AOCI), net of tax, during the three and nine months ended September 30, 2019 and 2018 (in thousands). Items in parentheses indicate charges to AOCI. Defined Benefit Pension Items Three months ended Nine months ended 2019 2018 2019 2018 Balance at beginning of period $ (21,868 ) $ (29,521 ) $ (22,844 ) $ (30,964 ) Amounts reclassified out of AOCI 488 721 1,464 2,164 Balance at end of period $ (21,380 ) $ (28,800 ) $ (21,380 ) $ (28,800 )
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 and nine months ended September 30, 2019 and 2018 (in thousands). Items in parentheses indicate increases to net income. Amount Reclassified from AOCI Details About AOCI Three months ended Nine months ended 2019 2018 2019 2018 Amortization of defined benefit pension items (1) Prior service cost $ 24 $ 24 $ 72 $ 73 Net loss 634 947 1,900 2,841 Total before tax 658 971 1,972 2,914 Tax benefit (2) (170 ) (250 ) (508 ) (750 ) Total reclassification for the period, net of tax $ 488 $ 721 $ 1,464 $ 2,164 (1) Amortization of these items is included in IDACORP's condensed consolidated income statements 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)	9 Months Ended
	Sep. 30, 2019
Changes in Idaho Power Retained Earnings [Abstract]
Changes in Idaho Power Retained Earnings Table	Three months ended Nine months ended 2019 2018 2019 2018 Balance at beginning of period $ 1,438,019 $ 1,345,246 $ 1,409,245 $ 1,308,702 Net income 87,979 100,194 180,740 196,687 Dividends to parent (31,932 ) (29,908 ) (95,919 ) (89,857 ) Balance at end of period $ 1,494,066 $ 1,415,532 $ 1,494,066 $ 1,415,532

INCOME TAXES_ Level 4 (Details)

INCOME TAXES: Level 4 (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Expense [Line Items]
Income tax at statutory rates (federal and state)				$ 54,626	$ 55,219
First mortgage bond redemption				0	1,261
Excess deferred income tax reversal				(4,123)	(6,140)
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability				0	(5,411)
Other	[1]			(23,997)	(28,541)
Income Tax Expense		$ 15,161	$ 3,868	$ 26,506	$ 13,866
Effective tax rate				12.50%	6.50%
Idaho Power Company
Income Tax Expense [Line Items]
Income tax at statutory rates (federal and state)				$ 53,496	$ 54,400
First mortgage bond redemption				0	1,261
Excess deferred income tax reversal				(4,123)	(6,140)
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability				0	(5,664)
Other	[1]			(22,282)	(26,679)
Income Tax Expense		$ 15,054	$ 4,161	$ 27,091	$ 14,656
Effective tax rate				13.00%	6.90%
[1]	"Other" is primarily comprised 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

9 Months Ended

12 Months Ended

Sep. 30, 2019

Sep. 30, 2018

Sep. 30, 2019

Sep. 30, 2018

May 31, 2020

May 31, 2019

Jun. 01, 2019

Dec. 31, 2018

Jun. 01, 2018

Apr. 30, 2018

Jun. 01, 2017

Oct. 31, 2014

Regulatory Matters

Revenue from contracts with customers

$ (367,101)

$ (398,798)

$ (1,010,281)

$ (1,019,668)

Power cost adjustment mechanism

Regulatory Matters

Amount of approved rate change

$ (30,400)

Idaho fixed cost adjustment mechanism

Regulatory Matters

Amount of approved rate change

19,400

Annual fixed cost adjustment mechanism deferral

$ 34,800

$ 15,600

$ 35,000

Percentage cap on the FCA adjustment

3.00%

October 2014 Idaho Settlement Stipulation | IDAHO

Regulatory Matters

Minimum authorized return on equity

9.50%

Investment Tax Credits, Maximum, in Rate Case

$ 45,000

May 2018 Tax Reform Settlement Stipulation | IDAHO

Regulatory Matters

Minimum authorized return on equity

9.40%

Target authorized return on equity

10.00%

Settlement Stipulation - Investment Tax Credits and Idaho Sharing Mechanism [Member]

Regulatory Matters

Additional accumulated deferred investment tax credits (ADITC) amortization

$ 1,500

0

Non-recurring [Member] | May 2018 Tax Reform Settlement Stipulation | IDAHO

Regulatory Matters

Amount of approved rate change

$ 7,800

Subsequent event | Power cost adjustment mechanism

Regulatory Matters

Amount of approved rate change

$ (50,100)

Subsequent event | Idaho fixed cost adjustment mechanism

Regulatory Matters

Amount of approved rate change

19,200

Subsequent event | Non-recurring [Member] | May 2018 Tax Reform Settlement Stipulation | IDAHO

Regulatory Matters

Amount of approved rate change

(2,700)

Settlement agreement sharing [Member]

Regulatory Matters

Regulatory liabilities

$ 5,000

Base rate adjustment request for potential Valmy closure [Member] [Member] | IDAHO

Regulatory Matters

Amount of approved rate change

$ 1,200

Base rate adjustment request for potential Valmy closure [Member] [Member] | Subsequent event | OREGON

Regulatory Matters

Public Utilities, Requested Rate Increase (Decrease), Amount

$ 3,200

Long-Term Debt (Details)

Long-Term Debt (Details) - Idaho Power [Member] $ in Millions	Aug. 21, 2019USD ($)
Humboldt County Pollution Control Revenue Bonds [Domain]
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent	$ 49.8
Debt Instrument, Interest Rate, Stated Percentage	1.45%
Sweetwater County Pollution Control Revenue Bond [Member]
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent	$ 116.3
Debt Instrument, Interest Rate, Stated Percentage	1.70%

REVENUES_ Electric utility op_2

REVENUES: Electric utility operating revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from contracts with customers	$ 367,101	$ 398,798	$ 1,010,281	$ 1,019,668
Alternative revenue programs and other revenues	17,927	8,557	40,293	35,847
Electric utility revenues	$ 385,028	$ 407,355	$ 1,050,574	$ 1,055,515

REVENUES_ (Details)

REVENUES: (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 367,101	$ 398,798	$ 1,010,281	$ 1,019,668
Alternative revenue programs and other revenues		17,927	8,557	40,293	35,847
Derivative revenues
Disaggregation of Revenue [Line Items]
Alternative revenue programs and other revenues		11,151	3,463	14,283	11,048
Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		340,820	358,024	876,922	921,137
Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	(6,776)	(5,094)	(26,010)	(24,799)
Alternative revenue programs and other revenues		6,776	5,094	26,010	24,799
Wholesale energy sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		5,321	12,408	68,693	35,093
Transmission Service Agreement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		12,498	17,640	40,743	43,839
Energy efficiency program revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		8,439	9,309	30,008	25,708
Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		6,799	6,511	19,925	18,690
Residential Retail Revenue | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	133,550	137,177	388,566	393,014
Residential Retail Revenue | Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		6,446	4,789	24,988	23,841
Commercial Retail Revenue | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[1]	80,304	85,936	224,382	237,127
Commercial Retail Revenue | Idaho fixed cost adjustment mechanism
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		330	305	1,022	958
Industrial Retail Revenue | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		47,122	50,292	138,222	144,951
Irrigation Retail Revenue | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		82,659	88,934	132,613	154,406
Settlement Stipulation - Investment Tax Credits and Idaho Sharing Mechanism [Member] | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		0	(1,500)	0	(1,500)
Deferred revenue-AFUDC | Retail revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	(2,815)	$ (2,815)	(6,861)	$ (6,861)
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]	As part of its January 30, 2009, general rate case order, the IPUC is allowing Idaho Power to recover a portion of the allowance for funds used during construction (AFUDC) on construction work in progress related to the Hells Canyon Complex (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.

COMMON STOCK_ Level 4 (Details)

COMMON STOCK: Level 4 (Details) $ in Billions	9 Months Ended
	Sep. 30, 2019USD ($)shares
Shareholders' equity
Restricted Stock Unit Awards to Employees	70,419
Restricted stock awards to directors	6,396
IDACORP
Shareholders' equity
Stock Issued During Period, Shares, New Issues	0
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.43
Dividend Distribution Restriction Amount | $	$ 1.5
Idaho Power Company
Shareholders' equity
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.45
Dividend Distribution Restriction Amount | $	$ 1.3
Dividend Distribution Restriction Threshold	0.35
Ratio of total Capital to total capital and long-term debt	0.55
Preferred Stock, Shares Outstanding	0

EARNINGS PER SHARE_ Level 4 (De

EARNINGS PER SHARE: Level 4 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net Income Attributable to IDACORP, Inc.	$ 89,876	$ 102,231	$ 185,718	$ 200,661
Denominator:
Weighted-average common shares outstanding - basic	50,499	50,434	50,502	50,431
Effect of dilutive securities	59	131	26	72
Weighted-average common shares outstanding - diluted	50,558	50,565	50,528	50,503
Earnings attributable to IDACORP, Inc. - basic (in dollars per share)	$ 1.78	$ 2.03	$ 3.68	$ 3.98
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share)	$ 1.78	$ 2.02	$ 3.68	$ 3.97

COMMITMENTS_ Level 4 (Details)

COMMITMENTS: Level 4 (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Idaho Power Company
Guarantor Obligations
IERCo ownership interest in BCC	33.00%	33.00%
IERCo guarantee of BCC reclamation obligation	$ 58,300,000	$ 58,300,000
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Life of Contract		20 years
Increase of Long-term Purchase Obligations, PURPA	24,000,000	$ 24,000,000
Increase of Long-term Purchase Obligations, Solar	136,000,000	136,000,000
Bridger Coal Company
Guarantor Obligations
IERCo guarantee of BCC reclamation obligation	175,000,000	175,000,000
Guarantor Obligations Total Reclamation Trust Fund	$ 126,400,000	126,400,000
Distribution from Reclamation Trust Fund		$ 0

BENEFIT PLANS_ Level 4 (Details

BENEFIT PLANS: Level 4 (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Plan
Defined Benefit Plan Disclosure
Service cost		$ 8,516,000	$ 8,892,000	$ 25,546,000	$ 28,377,000
Interest cost		10,578,000	9,761,000	31,734,000	29,125,000
Expected return on plan assets		(12,156,000)	(13,117,000)	(36,467,000)	(39,227,000)
Amortization of prior service cost		1,000	1,000	4,000	4,000
Amortization of net loss		3,391,000	3,381,000	10,173,000	10,169,000
Net periodic benefit cost		10,330,000	8,918,000	30,990,000	28,448,000
Regulatory deferral of net periodic benefit cost	[1]	(9,845,000)	(8,498,000)	(29,534,000)	(27,114,000)
IPUC Authorized recovered pension cost	[1]	4,288,000	4,288,000	12,865,000	12,865,000
Net periodic benefit cost recognized for financial reporting	[1],[2]	4,773,000	4,708,000	14,321,000	14,199,000
Contribution Requirement				0
Defined Benefit Plan, Contributions by Employer				40,000,000
Senior Management Security Plan
Defined Benefit Plan Disclosure
Service cost		(46,000)	(79,000)	(136,000)	(237,000)
Interest cost		1,143,000	1,062,000	3,432,000	3,186,000
Expected return on plan assets		0	0	0	0
Amortization of prior service cost		24,000	24,000	72,000	73,000
Amortization of net loss		634,000	947,000	1,900,000	2,841,000
Net periodic benefit cost		1,755,000	1,954,000	5,268,000	5,863,000
Net periodic benefit cost recognized for financial reporting	[2]	1,755,000	1,954,000	5,268,000	5,863,000
Postretirement Benefits Plan
Defined Benefit Plan Disclosure
Service cost		213,000	263,000	640,000	789,000
Interest cost		748,000	660,000	2,242,000	1,982,000
Expected return on plan assets		(555,000)	(616,000)	(1,665,000)	(1,850,000)
Amortization of prior service cost		11,000	11,000	35,000	35,000
Amortization of net loss		0	0	0	0
Net periodic benefit cost		417,000	318,000	1,252,000	956,000
Net periodic benefit cost recognized for financial reporting		417,000	318,000	1,252,000	956,000
Retirement Plan Total
Defined Benefit Plan Disclosure
Service cost		8,683,000	9,076,000	26,050,000	28,929,000
Interest cost		12,469,000	11,483,000	37,408,000	34,293,000
Expected return on plan assets		(12,711,000)	(13,733,000)	(38,132,000)	(41,077,000)
Amortization of prior service cost		36,000	36,000	111,000	112,000
Amortization of net loss		4,025,000	4,328,000	12,073,000	13,010,000
Net periodic benefit cost		12,502,000	11,190,000	37,510,000	35,267,000
Regulatory deferral of net periodic benefit cost	[1]	(9,845,000)	(8,498,000)	(29,534,000)	(27,114,000)
IPUC Authorized recovered pension cost	[1]	4,288,000	4,288,000	12,865,000	12,865,000
Net periodic benefit cost recognized for financial reporting	[1],[2]	6,945,000	6,980,000	20,841,000	21,018,000
Net Periodic Benefit cost recognize in Other operations and maintenance		4,200,000	4,100,000	12,600,000	12,300,000
Net Periodic Benefit cost recognized in other expense, net		$ 2,700,000	$ 2,900,000	$ 8,200,000	$ 8,700,000
[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, $4.2 million and $4.1 million , respectively, were recognized in "Other operations and maintenance" and $2.7 million and $2.9 million , respectively, were recognized in "Other expense, net" on the condensed consolidated statements of income of the companies for the three months ended September 30, 2019 and 2018 .

Derivative Instruments Fair Val

Derivative Instruments Fair Value and Offsets Table (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative Asset, Collateral, Obligation to Repay Cash, Offset	[1]		$ 45
Derivative Asset, Fair Value, Gross Asset		$ 2,071	4,639
Derivative Asset, Fair Value, Gross Liability		(1,155)	(984)
Derivative Asset, Fair Value, Amount Offset Against Collateral		916	3,655
Derivative Liability, Fair Value, Gross Liability		2,757	1,912
Derivative Liability, Fair Value, Gross Asset		(1,155)	(938)
Derivative Liability, Fair Value, Amount Offset Against Collateral		1,602	974
Financial Swaps | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		1,968	4,639
Derivative Asset, Fair Value, Gross Liability		(1,052)	(984)	[1]
Derivative Asset, Fair Value, Amount Offset Against Collateral		916	3,655
Derivative Liability, Fair Value, Gross Liability		1,052	938
Derivative Liability, Fair Value, Gross Asset		(1,052)	(938)
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		72	0
Derivative Asset, Fair Value, Gross Liability		(72)	0
Derivative Asset, Fair Value, Amount Offset Against Collateral		0	0
Derivative Liability, Fair Value, Gross Liability		1,610	806
Derivative Liability, Fair Value, Gross Asset		(72)	0
Derivative Liability, Fair Value, Amount Offset Against Collateral		1,538	806
Financial Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset			0
Derivative Asset, Fair Value, Gross Liability			0
Derivative Asset, Fair Value, Amount Offset Against Collateral			0
Derivative Liability, Fair Value, Gross Liability			64
Derivative Liability, Fair Value, Gross Asset			0
Derivative Liability, Fair Value, Amount Offset Against Collateral			64
Financial Swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		31
Derivative Asset, Fair Value, Gross Liability		(31)
Derivative Asset, Fair Value, Amount Offset Against Collateral		0
Derivative Liability, Fair Value, Gross Liability		95
Derivative Liability, Fair Value, Gross Asset		(31)
Derivative Liability, Fair Value, Amount Offset Against Collateral		$ 64
Forward contracts | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset			0
Derivative Asset, Fair Value, Gross Liability			0
Derivative Asset, Fair Value, Amount Offset Against Collateral			0
Derivative Liability, Fair Value, Gross Liability			104
Derivative Liability, Fair Value, Gross Asset			0
Derivative Liability, Fair Value, Amount Offset Against Collateral			$ 104
[1]	Current asset derivative amounts offset include $45 thousand of collateral payable for the period ending December 31, 2018 .

Derivative Instruments Gains (L

Derivative Instruments Gains (Loss) on Derivatives Recognized in Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financial Swaps | Operating revenues
Derivative Instruments, Gain (Loss)
Derivative, Loss on Derivative	[1]		$ (98)
Derivative, Gain on Derivative	[1]	$ 3,693		$ 904	$ 168
Financial Swaps | Purchased power
Derivative Instruments, Gain (Loss)
Derivative, Loss on Derivative	[1]	(2,981)		(2,294)
Derivative, Gain on Derivative	[1]		6,793		6,604
Financial Swaps | Fuel expense
Derivative Instruments, Gain (Loss)
Derivative, Loss on Derivative	[1]	(815)			(704)
Derivative, Gain on Derivative	[1]		95	11,587
Financial Swaps | Other operations and maintenance
Derivative Instruments, Gain (Loss)
Derivative, Gain on Derivative	[1]	0	47	0	85
Forward contracts | Operating revenues
Derivative Instruments, Gain (Loss)
Derivative, Gain on Derivative	[1]	106	20	170	22
Forward contracts | Purchased power
Derivative Instruments, Gain (Loss)
Derivative, Loss on Derivative	[1]	(106)	(20)	(170)	(40)
Forward contracts | Fuel expense
Derivative Instruments, Gain (Loss)
Derivative, Gain on Derivative	[1]	$ 191	$ 6	$ 607	$ 30
[1]	Excludes unrealized gains or losses on derivatives, which are recorded on the balance sheet as regulatory assets or regulatory liabilities.

Derivative Commodities and Disc

Derivative Commodities and Disclosures (Details) MWh in Thousands, MMBTU in Thousands, Gallon in Thousands, $ in Millions	Sep. 30, 2019USD ($)MMBTUGallonMWh	Sep. 30, 2018MMBTUGallonMWh
Derivative
Derivatives in a net liability position	$ 2.8
Collateral Already Posted, Aggregate Fair Value	1.5
Additional Collateral, Aggregate Fair Value	$ 5.9
Electricity (MWh) | Long
Derivative
Derivative, Number of Instruments Held | MWh	109	84
Electricity (MWh) | Short
Derivative
Derivative, Number of Instruments Held | MWh	10	33
Natural Gas (MMBTU) | Long
Derivative
Derivative, Number of Instruments Held | MMBTU	7,798	8,754
Natural Gas (MMBTU) | Short
Derivative
Derivative, Number of Instruments Held | MMBTU	0	308
Diesel Fuel (Gallons) | Long
Derivative
Derivative, Number of Instruments Held | Gallon	0	220

FAIR VALUE MEASUREMENTS_ Leve_2

FAIR VALUE MEASUREMENTS: Level 4 (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	$ 63,390,000	$ 97,833,000
Derivative Assets		916,000	3,655,000
Equity Securities, FV-NI		33,776,000	36,488,000
Derivative Liabilities		1,602,000	974,000
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		0	0
Idaho Power Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds		30,424,000	79,228,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	[1]	63,390,000	97,833,000
Derivative Assets		916,000	3,655,000
Equity Securities, FV-NI		33,776,000	36,488,000
Derivative Liabilities		1,602,000	870,000
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		30,424,000	79,228,000
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
Derivative Liabilities		0	104,000
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
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
[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		Sep. 30, 2019	Dec. 31, 2018
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Receivable	[1]	$ 3,804	$ 3,804
Long-term debt	[1]	1,836,395	1,834,788
Carrying Amount | Idaho Power Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1]	1,836,395	1,834,788
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Receivable	[1]	3,804	3,804
Long-term debt	[1]	2,126,459	1,942,773
Estimated Fair Value | Idaho Power Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[1]	$ 2,126,459	$ 1,942,773
[1]	Notes receivable and long-term debt are categorized as Level 3 and Level 2, respectively, of the fair value hierarchy, as defined earlier in this Note 12 - "Fair Value Measurements."

SEGMENT INFORMATION_ Level 4 (D

SEGMENT INFORMATION: Level 4 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information
Electric utility revenues	$ 385,028	$ 407,355	$ 1,050,574	$ 1,055,515
Total operating revenues	386,320	408,801	1,053,535	1,058,860
Net Income Attributable to IDACORP, Inc.	90,218	102,591	186,255	201,294
Net Income Attributable to IDACORP, Inc.	89,876	102,231	185,718	200,661
Total assets	6,502,319		6,502,319		$ 6,382,754
All Other
Segment Reporting Information
Total operating revenues	1,292	1,446	2,961	3,345
Net Income Attributable to IDACORP, Inc.	1,897	2,037	4,978	3,974
Total assets	196,491		196,491
Eliminations
Segment Reporting Information
Total operating revenues	0	0	0	0
Net Income Attributable to IDACORP, Inc.	0	0	0	0
Total assets	(43,896)		(43,896)
Idaho Power Company
Segment Reporting Information
Electric utility revenues	385,028	407,355	1,050,574	1,055,515
Net Income Attributable to IDACORP, Inc.	87,979	$ 100,194	180,740	$ 196,687
Total assets	$ 6,349,724		$ 6,349,724		$ 6,254,400
IERCo's ownership percentage in Bridger Coal Company	33.00%		33.00%

CHANGES IN ACCUMULATED OTHER _3

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME: Level 4 (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification out of Accumulated Other Comprehensive Income
Amortization of prior service cost	[1]	$ 24	$ 24	$ 72	$ 73
Amortization of net loss	[1]	634	947	1,900	2,841
Total reclassification, before tax - pension and postretirement benefits		658	971	1,972	2,914
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	[2]	(170)	(250)	(508)	(750)
Reclassifications		488	721	1,464	2,164
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance		(21,868)	(29,521)	(22,844)	(30,964)
Reclassifications		488	721	1,464	2,164
AOCI - Ending Balance		(21,380)	(28,800)	(21,380)	(28,800)
Accumulated Defined Benefit Pension Items
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications		488	721	1,464	2,164
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
AOCI - Beginning Balance		(21,868)	(29,521)	(22,844)	(30,964)
Reclassifications		488	721	1,464	2,164
AOCI - Ending Balance		$ (21,380)	$ (28,800)	$ (21,380)	$ (28,800)
[1]	Amortization of these items is included in IDACORP's condensed consolidated income statements 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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Changes in Idaho Power Retained Earnings
Balance at beginning of period	$ 1,563,399	$ 1,465,009	$ 1,531,543	$ 1,426,528
Net Income	90,218	102,591	186,255	201,294
Dividends to parent			(95,871)	(89,674)
Common stock dividends	(31,933)	(29,908)	(95,919)	(89,857)
Balance at end of period	1,621,342	1,537,332	1,621,342	1,537,332
Idaho Power Company
Changes in Idaho Power Retained Earnings
Balance at beginning of period	1,438,019	1,345,246	1,409,245	1,308,702
Net Income	87,979	100,194	180,740	196,687
Dividends to parent	(31,932)	(29,908)	(95,919)	(89,857)
Balance at end of period	$ 1,494,066	$ 1,415,532	$ 1,494,066	$ 1,415,532