EARNINGS PER SHARE: Level 4 (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Numerator:
Net income attributable to IDACORP, Inc.	$ 20,901	$ 39,209	$ 50,641	$ 55,272
Denominator:
Weighted Average Common Shares Outstanding - Basic (000’s)	49,420	47,888	49,355	47,831
Options	19	41	16	41
Restricted Stock	77	119	65	94
Weighted Average Common Shares Outstanding - Diluted (000’s)	49,516	48,048	49,436	47,966
Earnings Attributable to IDACORP, Inc. - Basic	$ 0.42	$ 0.82	$ 1.03	$ 1.16
Earnings Attributable to IDACORP, Inc. - Diluted	$ 0.42	$ 0.82	$ 1.02	$ 1.15
Antidilutive securities excluded from computation of earnings per share	151,659	343,835	208,374	344,918
Options outstanding	213,440		213,440