COMMON STOCK: Common Stock Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares
Continuous equity program
Class of Stock [Line Items]
Shares reserved for future issuance | shares	3,000,000
Shares issued during the year | shares	0	0	0
Idaho Power Company
Class of Stock [Line Items]
Capital contribution from parent | $	$ 0	$ 0	$ 0
Maximum leverage ratio requirement	0.65
Leverage ratio	0.48
Amount dividends were limited to based on covenant restrictions | $	$ 980,000
Percentage of capital threshold below which Idaho Power will not pay dividends to IDACORP	0.35
Equity Capital Ratio	0.52
Shares of preferred stock outstanding | shares	0
IDACORP
Class of Stock [Line Items]
Maximum leverage ratio requirement	0.65
Leverage ratio	0.46
Amount dividends were limited to based on covenant restrictions | $	$ 1,100,000