Consolidated Statements of Income Statement - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Revenues:
Electric utility revenues	$ 1,342,940	$ 1,366,582	$ 1,344,893
Other operating revenues	3,443	4,170	4,593
Total operating revenues	1,346,383	1,370,752	1,349,486
Operating Expenses:
Purchased power	285,266	293,814	248,950
Fuel expense	156,872	133,198	145,829
Power cost adjustment	2,047	42,106	52,024
Other operations and maintenance	355,770	364,456	346,695
Energy efficiency programs	40,128	35,703	39,241
Depreciation	169,210	165,190	162,091
Taxes other than income taxes	34,044	34,792	34,089
Total electric utility expenses	1,043,337	1,069,259	1,028,919
Other	4,720	4,571	5,022
Total operating expenses	1,048,057	1,073,830	1,033,941
Operating Income	298,326	296,922	315,545
Other Income (Expense):
Allowance for equity funds used during construction	27,112	24,353	20,784
Earnings of unconsolidated equity-method investments	12,370	12,449	11,374
Other expense, net	6,502	(2,867)	(2,109)
Total other income	20,363	11,645	12,547
Interest Expense:
Interest on long-term debt	82,457	84,408	81,198
Other interest	14,721	11,691	11,242
Allowance for borrowed funds used during construction	(10,703)	(10,151)	(8,694)
Total interest expense, net	86,475	85,948	83,746
Income Before Income Taxes	257,835	244,909	261,848
Income Tax Expense	24,507	17,386	48,660
Net Income	233,328	227,523	213,188
Adjustment for income attributable to noncontrolling interests	(474)	(722)	(769)
Net Income Attributable to IDACORP, Inc.	$ 232,854	$ 226,801	$ 212,419
Weighted Average Common Shares Outstanding - Basic (000’s) (in shares)	50,502	50,432	50,361
Weighted Average Common Shares Outstanding - Diluted (000’s) (in shares)	50,537	50,510	50,424
Earnings Per Share of Common Stock:
Earnings Attributable to IDACORP, Inc. - Basic (in dollars per share)	$ 4.61	$ 4.50	$ 4.22
Earnings Attributable to IDACORP, Inc. - Diluted (in dollars per share)	$ 4.61	$ 4.49	$ 4.21
Idaho Power Company
Operating Revenues:
Electric utility revenues	$ 1,342,940	$ 1,366,582	$ 1,344,893
Operating Expenses:
Purchased power	285,266	293,814	248,950
Fuel expense	156,872	133,198	145,829
Power cost adjustment	2,047	42,106	52,024
Other operations and maintenance	355,770	364,456	346,695
Energy efficiency programs	40,128	35,703	39,241
Depreciation	169,210	165,190	162,091
Taxes other than income taxes	34,044	34,792	34,089
Total electric utility expenses	1,043,337	1,069,259	1,028,919
Operating Income	299,603	297,323	315,974
Other Income (Expense):
Allowance for equity funds used during construction	27,112	24,353	20,784
Earnings of unconsolidated equity-method investments	10,285	10,712	9,267
Other expense, net	2,266	(5,851)	(4,756)
Total other income	39,663	29,214	25,295
Interest Expense:
Interest on long-term debt	82,457	84,408	81,198
Other interest	14,658	11,634	11,156
Allowance for borrowed funds used during construction	(10,703)	(10,151)	(8,694)
Total interest expense, net	86,412	85,891	83,660
Income Before Income Taxes	252,854	240,646	257,609
Income Tax Expense	28,417	18,312	51,262
Net Income	$ 224,437	$ 222,334	$ 206,347