EARNINGS PER SHARE: Level 4 (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Numerator:
Net income attributable to IDACORP, Inc.	$ 35,301	$ 20,901	$ 60,230	$ 50,641
Denominator:
Weighted Average Common Shares Outstanding - Basic	49,927,000	49,420,000	49,893,000	49,355,000
Effect of dilutive securities:
Options	5,000	19,000	5,000	16,000
Restricted Stock	52,000	77,000	46,000	65,000
Weighted Average Common Shares Outstanding - Diluted	49,984,000	49,516,000	49,944,000	49,436,000
Earnings Attributable to IDACORP, Inc. - Basic	$ 0.71	$ 0.42	$ 1.21	$ 1.03
Earnings Attributable to IDACORP, Inc. - Diluted	$ 0.71	$ 0.42	$ 1.21	$ 1.02
Antidilutive securities excluded from computation of earnings per share		151,659		208,374
Options outstanding	17,806		17,806