SEGMENT INFORMATION: Level 4 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information
Revenues	$ 302,544	$ 280,956
Net Income Attributable to IDACORP, Inc.	33,006	25,530
Net Income Attributable to IDACORP, Inc.	33,102	25,729
Total assets	6,229,948		$ 6,289,897
Idaho Power Company
Segment Reporting Information
Revenues	301,964	280,566
Net Income Attributable to IDACORP, Inc.	32,482	25,534
Total assets	6,178,648
All Other
Segment Reporting Information
Revenues	580	390
Net Income Attributable to IDACORP, Inc.	620	195
Total assets	74,472
Eliminations
Segment Reporting Information
Revenues	0	0
Net Income Attributable to IDACORP, Inc.	0	0
Total assets	$ (23,172)
Idaho Power Company
Segment Reporting Information
IERCo's ownership percentage in Bridger Coal Company	33.00%
Net Income Attributable to IDACORP, Inc.	$ 32,482	$ 25,534
Total assets	$ 6,178,648		$ 6,236,744