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INCOME TAXES: Level 3 (Tables)
 6 Months Ended
Jun. 30, 2012
Income Taxes [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
The following table provides a summary of income tax expense (benefit) for the three and six months ended June 30 (in thousands of dollars): 
 
 
IDACORP
 
Idaho Power
 
 
2012
 
2011
 
2012
 
2011
Three months ended June 30,
 
 
 
 
 
 
 
 
Income tax at statutory rates (federal and state)
 
$
17,935

 
$
6,744

 
$
18,513

 
$
7,150

Additional ADITC amortization
 
825

 
(2,895
)
 
825

 
(2,895
)
Examination settlement - capitalized repairs
 
—

 
(3,428
)
 
—

 
(3,428
)
Other
 
(8,191
)
 
(4,073
)
 
(6,699
)
 
(3,241
)
Income tax expense (benefit)
 
$
10,569

 
$
(3,652
)
 
$
12,639

 
$
(2,414
)
Effective tax rate
 
23.0
%
 
(21.2
)%
 
26.7
%
 
(13.2
)%
Six months ended June 30,
 
 
 
 
 
 
 
 
Income tax at statutory rates (federal and state)
 
$
30,941

 
$
20,284

 
$
32,642

 
$
21,633

Additional ADITC amortization
 
—

 
(6,750
)
 
—

 
(6,750
)
Examination settlement - capitalized repairs
 
—

 
(3,428
)
 
—

 
(3,428
)
Other
 
(12,039
)
 
(8,871
)
 
(9,688
)
 
(6,676
)
Income tax expense
 
$
18,902

 
$
1,235

 
$
22,954

 
$
4,779

Effective tax rate
 
23.9
%
 
2.4
 %
 
27.5
%
 
8.6
 %