Condensed Consolidated Statements of Equity $ in Thousands	USD ($)
Balance at beginning of period at Dec. 31, 2014	$ 845,402
Common Stock
Other common stock changes	2,601
Balance at end of period at Sep. 30, 2015	848,003
Balance at beginning of period at Dec. 31, 2014	1,132,237
Retained Earnings
Net Income Attributable to IDACORP, Inc.	162,847
Common stock dividends	(71,059)
Balance at end of period at Sep. 30, 2015	1,224,025
AOCI - Beginning Balance at Dec. 31, 2014	(24,158)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	2,001
AOCI - Ending Balance at Sep. 30, 2015	(22,157)
Balance at beginning of period at Dec. 31, 2014	(280)
Treasury Stock
Issued	3,500
Acquired	(3,277)
Balance at end of period at Sep. 30, 2015	(57)
Balance at beginning of period at Dec. 31, 2014	4,364
Noncontrolling Interests
Net (loss) income attributable to noncontrolling interests	(45)
Balance at end of period at Sep. 30, 2015	4,319
Balance at end of period at Sep. 30, 2015	848,003
Retained Earnings
Net Income Attributable to IDACORP, Inc.	73,336
Balance at end of period at Sep. 30, 2015	1,224,025
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	667
AOCI - Ending Balance at Sep. 30, 2015	(22,157)
Balance at end of period at Sep. 30, 2015	(57)
Noncontrolling Interests
Net (loss) income attributable to noncontrolling interests	(69)
Balance at end of period at Sep. 30, 2015	4,319
Treasury Stock
Total IDACORP, Inc. shareholders’ equity at end of period	2,049,814
Noncontrolling Interests
Total equity at end of period	2,054,133
Total IDACORP, Inc. shareholders’ equity at end of period	2,057,884
Total equity at end of period	2,062,044
Balance at beginning of period at Dec. 31, 2015	849,112
Common Stock
Other common stock changes	1,352
Balance at end of period at Sep. 30, 2016	850,698
Balance at beginning of period at Dec. 31, 2015	1,230,105
Retained Earnings
Net Income Attributable to IDACORP, Inc.	165,075
Common stock dividends	(77,214)
Balance at end of period at Sep. 30, 2016	1,317,732
AOCI - Beginning Balance at Dec. 31, 2015	(21,276)
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	1,690
AOCI - Ending Balance at Sep. 30, 2016	(19,586)
Balance at beginning of period at Dec. 31, 2015	(57)
Treasury Stock
Issued	3,143
Acquired	(3,287)
Balance at end of period at Sep. 30, 2016	(201)
Balance at beginning of period at Dec. 31, 2015	4,160
Noncontrolling Interests
Net (loss) income attributable to noncontrolling interests	(141)
Balance at end of period at Sep. 30, 2016	4,019
Balance at end of period at Sep. 30, 2016	850,698
Retained Earnings
Net Income Attributable to IDACORP, Inc.	83,100
Balance at end of period at Sep. 30, 2016	1,317,732
Accumulated Other Comprehensive (Loss) Income
Unfunded pension liability adjustment (net of tax)	563
AOCI - Ending Balance at Sep. 30, 2016	(19,586)
Balance at end of period at Sep. 30, 2016	(201)
Noncontrolling Interests
Net (loss) income attributable to noncontrolling interests	(83)
Balance at end of period at Sep. 30, 2016	4,019
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	2,148,643
Noncontrolling Interests
Total equity at end of period	$ 2,152,662