SEGMENT INFORMATION: Level 4 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information
Total operating revenues	$ 446,944	$ 425,261	$ 1,123,072	$ 1,035,035
Net Income Attributable to IDACORP, Inc.	97,897	102,031	212,752	199,910
Total assets	7,254,054		7,254,054		$ 7,095,244
Eliminations
Segment Reporting Information
Total operating revenues	0	0	0	0
Net Income Attributable to IDACORP, Inc.	0	0	0	0
Total assets	(59,100)		(59,100)
All Other | Operating Segments
Segment Reporting Information
Total operating revenues	591	1,091	2,093	2,711
Net Income Attributable to IDACORP, Inc.	(325)	1,642	1,338	3,821
Total assets	268,066		268,066
Utility Operations
Segment Reporting Information
Net Income Attributable to IDACORP, Inc.	98,222	100,389	211,414	196,089
Total assets	7,045,088		7,045,088
Utility Operations | Operating Segments
Segment Reporting Information
Total operating revenues	$ 446,353	$ 424,170	$ 1,120,979	$ 1,032,324