Consolidated Statements of Equity $ in Thousands	USD ($)
Balance at beginning of year at Dec. 31, 2016	$ 851,833
Common Stock
Share-based compensation expense	7,384
Treasury shares issued	(2,069)
Other	59
Balance at end of year at Dec. 31, 2017	857,207
Balance at beginning of year at Dec. 31, 2016	1,323,198
Retained Earnings
Cumulative effect of accounting change - Retained Earnings	4,092
Net income attributable to IDACORP, Inc.	212,419
Common stock dividends ($2.40, $2.24, and $2.08 per share, respectively)	(113,181)
Balance at end of year at Dec. 31, 2017	1,426,528
AOCI - Beginning Balance at Dec. 31, 2016	(20,882)
Accumulated Other Comprehensive (Loss) Income
Cumulative effect of accounting change - Accumulated Other Comprehensive (Loss) Income	(4,092)
Unfunded pension liability adjustment, net of tax	(5,990)
AOCI - Ending Balance at Dec. 31, 2017	(30,964)
Balance at beginning of year at Dec. 31, 2016	243
Treasury Stock
Issued	2,069
Acquired	(3,212)
Balance at end of year at Dec. 31, 2017	1,386
Balance at beginning of year at Dec. 31, 2016	3,960
Noncontrolling Interests
Adjustment for income (loss) attributable to noncontrolling interests	769
Balance at end of year at Dec. 31, 2017	4,729
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of year	2,251,385
Noncontrolling Interests
Total equity at end of year	2,256,114
Share-based compensation expense	9,362
Treasury shares issued	(3,068)
Other	92
Balance at end of year at Dec. 31, 2018	863,593
Retained Earnings
Cumulative effect of accounting change - Retained Earnings	0
Net income attributable to IDACORP, Inc.	226,801
Common stock dividends ($2.40, $2.24, and $2.08 per share, respectively)	(121,786)
Balance at end of year at Dec. 31, 2018	1,531,543
Accumulated Other Comprehensive (Loss) Income
Cumulative effect of accounting change - Accumulated Other Comprehensive (Loss) Income	0
Unfunded pension liability adjustment, net of tax	8,120
AOCI - Ending Balance at Dec. 31, 2018	(22,844)
Treasury Stock
Issued	3,068
Acquired	(3,614)
Balance at end of year at Dec. 31, 2018	1,932
Noncontrolling Interests
Adjustment for income (loss) attributable to noncontrolling interests	722
Balance at end of year at Dec. 31, 2018	5,451
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of year	2,370,360
Noncontrolling Interests
Total equity at end of year	2,375,811
Share-based compensation expense	8,788
Treasury shares issued	(4,172)
Other	98
Balance at end of year at Dec. 31, 2019	868,307
Retained Earnings
Cumulative effect of accounting change - Retained Earnings	0
Net income attributable to IDACORP, Inc.	232,854
Common stock dividends ($2.40, $2.24, and $2.08 per share, respectively)	(129,872)
Balance at end of year at Dec. 31, 2019	1,634,525
Accumulated Other Comprehensive (Loss) Income
Cumulative effect of accounting change - Accumulated Other Comprehensive (Loss) Income	0
Unfunded pension liability adjustment, net of tax	(13,440)
AOCI - Ending Balance at Dec. 31, 2019	(36,284)
Treasury Stock
Issued	4,172
Acquired	(4,160)
Balance at end of year at Dec. 31, 2019	1,920
Noncontrolling Interests
Adjustment for income (loss) attributable to noncontrolling interests	474
Balance at end of year at Dec. 31, 2019	5,925
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of year	2,464,628
Noncontrolling Interests
Total equity at end of year	$ 2,470,553