Condensed Consolidated Statements of Equity $ in Thousands	USD ($)
Balance at beginning of period at Dec. 31, 2019	$ 868,307
Common Stock
Share-based compensation Expense	4,325
Withholding on net settlements of share-based awards	(4,630)
Treasury Stock Issued	(1,920)
Other common stock changes	45
Balance at end of period at Jun. 30, 2020	866,127
Balance at beginning of period at Dec. 31, 2019	1,634,525
Retained Earnings
Net Income Attributable to IDACORP, Inc.	97,879
Common stock dividends	(67,936)
Balance at end of period at Jun. 30, 2020	1,664,468
AOCI - Beginning Balance at Dec. 31, 2019	(36,284)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	1,494
AOCI - Ending Balance at Jun. 30, 2020	(34,790)
Balance at beginning of period at Dec. 31, 2019	(1,920)
Treasury Stock
Issued	1,920
Balance at end of period at Jun. 30, 2020	0
Balance at beginning of period at Dec. 31, 2019	5,925
Noncontrolling Interests
Loss attributable to noncontrolling interests	238
Balance at end of period at Jun. 30, 2020	6,163
Balance at beginning of period at Mar. 31, 2020	864,850
Common Stock
Share-based compensation Expense	1,701
Withholding on net settlements of share-based awards	(447)
Treasury Stock Issued	0
Other common stock changes	23
Balance at end of period at Jun. 30, 2020	866,127
Balance at beginning of period at Mar. 31, 2020	1,638,065
Retained Earnings
Net Income Attributable to IDACORP, Inc.	60,389
Common stock dividends	(33,986)
Balance at end of period at Jun. 30, 2020	1,664,468
AOCI - Beginning Balance at Mar. 31, 2020	(35,537)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	747
AOCI - Ending Balance at Jun. 30, 2020	(34,790)
Balance at beginning of period at Mar. 31, 2020	0
Treasury Stock
Issued	0
Balance at end of period at Jun. 30, 2020	0
Balance at beginning of period at Mar. 31, 2020	5,893
Noncontrolling Interests
Loss attributable to noncontrolling interests	270
Balance at end of period at Jun. 30, 2020	6,163
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,495,805
Noncontrolling Interests
Total equity	2,501,968
Total IDACORP, Inc. shareholders’ equity at end of period	2,559,980
Total equity	2,566,456
Balance at beginning of period at Dec. 31, 2020	869,235
Common Stock
Share-based compensation Expense	4,850
Withholding on net settlements of share-based awards	(3,026)
Treasury Stock Issued	0
Other common stock changes	52
Balance at end of period at Jun. 30, 2021	871,111
Balance at beginning of period at Dec. 31, 2020	1,734,103
Retained Earnings
Net Income Attributable to IDACORP, Inc.	114,854
Common stock dividends	(71,971)
Balance at end of period at Jun. 30, 2021	1,776,986
AOCI - Beginning Balance at Dec. 31, 2020	(43,358)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	1,672
AOCI - Ending Balance at Jun. 30, 2021	(41,686)
Balance at beginning of period at Dec. 31, 2020	0
Treasury Stock
Issued	0
Balance at end of period at Jun. 30, 2021	0
Balance at beginning of period at Dec. 31, 2020	6,476
Noncontrolling Interests
Loss attributable to noncontrolling interests	220
Balance at end of period at Jun. 30, 2021	6,696
Balance at beginning of period at Mar. 31, 2021	868,944
Common Stock
Share-based compensation Expense	2,140
Withholding on net settlements of share-based awards	0
Treasury Stock Issued	0
Other common stock changes	27
Balance at end of period at Jun. 30, 2021	871,111
Balance at beginning of period at Mar. 31, 2021	1,742,994
Retained Earnings
Net Income Attributable to IDACORP, Inc.	70,023
Common stock dividends	(36,031)
Balance at end of period at Jun. 30, 2021	1,776,986
AOCI - Beginning Balance at Mar. 31, 2021	(42,522)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment, net of tax	836
AOCI - Ending Balance at Jun. 30, 2021	(41,686)
Balance at beginning of period at Mar. 31, 2021	0
Treasury Stock
Issued	0
Balance at end of period at Jun. 30, 2021	0
Balance at beginning of period at Mar. 31, 2021	6,445
Noncontrolling Interests
Loss attributable to noncontrolling interests	251
Balance at end of period at Jun. 30, 2021	6,696
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,606,411
Noncontrolling Interests
Total equity	$ 2,613,107