EARNINGS PER SHARE: Level 4 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net Income Attributable to IDACORP, Inc.	$ 70,023	$ 60,389	$ 114,854	$ 97,879
Denominator:
Weighted-average common shares outstanding - basic	50,609	50,551	50,588	50,534
Effect of dilutive securities	13	16	13	13
Weighted-average common shares outstanding - diluted	50,622	50,567	50,601	50,547
Earnings attributable to IDACORP, Inc. - basic (in dollars per share)	$ 1.38	$ 1.19	$ 2.27	$ 1.94
Earnings attributable to IDACORP, Inc. - diluted (in dollars per share)	$ 1.38	$ 1.19	$ 2.27	$ 1.94