INCOME TAXES: Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Income Tax Expense [Line Items]
Income tax at statutory rates (federal and state)	$ 11,551		$ 14,119
Additional accumulated deferred investment tax credit amortization	0		(950)
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(808)		(1,268)
Amortization Method Qualified Affordable Housing Project Investments, Amortization	400		704
Other	(5,032)	[1]	(3,898)	[1]
Income Tax Expense	6,111		8,707
Effective tax rate	20.70%		24.10%
Idaho Power Company
Income Tax Expense [Line Items]
Income tax at statutory rates (federal and state)	11,708		14,417
Additional accumulated deferred investment tax credit amortization	0		(950)
Other	(5,226)	[1]	(4,496)	[1]
Income Tax Expense	$ 6,482		$ 8,971
Effective tax rate	21.60%		24.30%

[1] "Other" is primarily comprised of the net tax effect of Idaho Power's regulatory flow-through tax adjustments. These adjustments, which include the capitalized repairs deduction, are each listed in the rate reconciliation table in Note 2 to the consolidated financial statements included in IDACORP's and Idaho Power's Annual Report on Form 10-K for the year ended December 31, 2014.