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INCOME TAXES: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
The following table provides a summary of income tax expense for the three months ended March 31 (in thousands of dollars): 
 
 
IDACORP
 
Idaho Power
 
 
2014
 
2013
 
2014
 
2013
Three months ended March 31,
 
 
 
 
 
 
 
 
Income tax at statutory rates (federal and state)
 
$
14,119

 
$
18,470

 
$
14,417

 
$
18,543

Additional accumulated deferred investment tax credit amortization
 
(950
)
 
—

 
(950
)
 
—

Affordable housing tax credits
 
(1,268
)
 
(1,384
)
 
—

 
—

Affordable housing investment amortization, net of statutory taxes
 
704

 
(101
)
 
—

 
—

Other(1)
 
(3,898
)
 
(4,942
)
 
(4,496
)
 
(5,165
)
Income tax expense
 
$
8,707

 
$
12,043

 
$
8,971

 
$
13,378

Effective tax rate
 
24.1
%
 
25.5
%
 
24.3
%
 
28.2
%
 (1) "Other" is primarily comprised of Idaho Power's regulatory flow-through tax adjustments, which are 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, 2013.