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INCOME TAXES: Level 3 (Tables)
 3 Months Ended
Mar. 31, 2017
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): 
 
 
IDACORP
 
Idaho Power
 
 
2017
 
2016
 
2017
 
2016
Income tax at statutory rates (federal and state)
 
$
15,360

 
$
11,768

 
$
15,192

 
$
11,809

Additional ADITC amortization
 
(1,875
)
 
(500
)
 
(1,875
)
 
(500
)
Share-based compensation
 
(1,559
)
 
(1,622
)
 
(1,530
)
 
(1,587
)
Other(1)
 
(5,743
)
 
(5,279
)
 
(5,414
)
 
(5,054
)
Income tax expense
 
$
6,183

 
$
4,367

 
$
6,373

 
$
4,668

Effective tax rate
 
15.7
%
 
14.6
%
 
16.4
%
 
15.5
%
(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, 2016.