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OTHER INCOME AND EXPENSE Other Income and Expense Level 3 (Tables)
 12 Months Ended
Dec. 31, 2019
Schedule of other nonoperating income (expense) [Line Items]  
Schedule of Other Nonoperating Income, by Component [Table Text Block]
The following table presents the components of IDACORP’s other income (expense), net and Idaho Power's other income (expense), net (in thousands of dollars):
IDACORP
 
2019
 
2018
 
2017
Interest and dividend income, net
 
$
8,181

 
$
5,605

 
$
3,872

Carrying charges on regulatory assets
 
5,494

 
4,075

 
2,310

Pension and postretirement non-service costs(1)
 
(10,976
)
 
(15,781
)
 
(11,194
)
Income from life insurance investments
 
4,104

 
2,779

 
2,090

Other (expense) income
 
(301
)
 
455

 
813

Total other income (expense), net
 
$
6,502

 
$
(2,867
)
 
$
(2,109
)
 
 
 
 
 
 
 
Idaho Power
 
 
 
 
 
 
Interest and dividend income, net
 
$
5,898

 
$
4,688

 
$
3,787

Carrying charges on regulatory assets
 
5,494

 
4,075

 
2,310

Pension and postretirement non-service costs(1)
 
(10,976
)
 
(15,781
)
 
(11,194
)
Income from life insurance investments
 
4,104

 
2,779

 
2,090

Other expense
 
(2,254
)
 
(1,612
)
 
(1,749
)
Total other income (expense), net
 
$
2,266

 
$
(5,851
)
 
$
(4,756
)
 
 
 
 
 
 
 

(1) The 2018 pension and postretirement non-service costs includes $4.2 million of expense for a temporary deviation from the cost-sharing provisions of the substantive postretirement plan as described in Note 12 - "Benefit Plans."