EARNINGS PER SHARE: Level 4 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income attributable to IDACORP, Inc.	$ 83,100	$ 73,336	$ 165,075	$ 162,847
Denominator:
Weighted Average Common Shares Outstanding - Basic	50,296	50,219	50,299	50,221
Effect of dilutive securities	97	105	62	61
Weighted Average Common Shares Outstanding - Diluted	50,393	50,324	50,361	50,282
Earnings Attributable to IDACORP, Inc. - Basic (in dollars per share)	$ 1.65	$ 1.46	$ 3.28	$ 3.24
Earnings Attributable to IDACORP, Inc. - Diluted (in dollars per share)	$ 1.65	$ 1.46	$ 3.28	$ 3.24