Condensed Consolidated Statements of Equity $ in Thousands	USD ($)
Balance at beginning of period at Dec. 31, 2015	$ 849,112
Common Stock
Other common stock changes	(985)
Balance at end of period at Mar. 31, 2016	848,361
Balance at beginning of period at Dec. 31, 2015	1,230,105
Retained Earnings
Net Income Attributable to IDACORP, Inc.	25,729
Common stock dividends	(25,713)
Balance at end of period at Mar. 31, 2016	1,229,887
AOCI - Beginning Balance at Dec. 31, 2015	(21,276)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	564
AOCI - Ending Balance at Mar. 31, 2016	(20,712)
Balance at beginning of period at Dec. 31, 2015	(57)
Treasury Stock
Issued	3,112
Acquired	(3,084)
Balance at end of period at Mar. 31, 2016	(29)
Balance at beginning of period at Dec. 31, 2015	4,160
Noncontrolling Interests
Net loss attributable to noncontrolling interests	(199)
Balance at end of period at Mar. 31, 2016	3,961
Common Stock
Cumulative Effect of New Accounting Principle ASU 2016-09 in Period of Adoption	234
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,057,507
Noncontrolling Interests
Total equity at end of period	2,061,468
Total IDACORP, Inc. shareholders’ equity at end of period	2,153,906
Total equity at end of period	2,157,866
Balance at beginning of period at Dec. 31, 2016	851,833
Common Stock
Other common stock changes	830
Balance at end of period at Mar. 31, 2017	852,663
Balance at beginning of period at Dec. 31, 2016	1,323,198
Retained Earnings
Net Income Attributable to IDACORP, Inc.	33,102
Common stock dividends	(27,811)
Balance at end of period at Mar. 31, 2017	1,328,489
AOCI - Beginning Balance at Dec. 31, 2016	(20,882)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	471
AOCI - Ending Balance at Mar. 31, 2017	(20,411)
Balance at beginning of period at Dec. 31, 2016	(243)
Treasury Stock
Issued	1,813
Acquired	(3,162)
Balance at end of period at Mar. 31, 2017	(1,592)
Balance at beginning of period at Dec. 31, 2016	3,960
Noncontrolling Interests
Net loss attributable to noncontrolling interests	(96)
Balance at end of period at Mar. 31, 2017	3,864
Common Stock
Cumulative Effect of New Accounting Principle ASU 2016-09 in Period of Adoption	0
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,159,149
Noncontrolling Interests
Total equity at end of period	$ 2,163,013