COMMON STOCK: Level 4 (Details) $ in Billions	9 Months Ended
	Sep. 30, 2016 USD ($) shares
IDACORP
Shareholders' equity
Stock Issued During Period, Shares, New Issues | shares	67,966
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.45
Dividend Distribution Restriction Amount | $	$ 1.2
Idaho Power Company
Shareholders' equity
Maximum leverage ratio requirement	0.65
Ratio of Indebtedness to Net Capital	0.47
Dividend Distribution Restriction Amount | $	$ 1.1
Dividend Distribution Restriction Threshold	0.35
Ratio of total Capital to total capital and long-term debt	0.53
Preferred Stock, Shares Outstanding | shares	0