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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME: Level 3 (Tables)
9 Months Ended
Sep. 30, 2015
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The table below presents changes in components of accumulated other comprehensive income (AOCI), net of tax, during the three and nine months ended September 30, 2015 and 2014 (in thousands of dollars). Items in parentheses indicate charges to AOCI.
 
 
Defined Benefit Pension Items
Three months ended September 30, 2015:
 
 
Balance at beginning of period
 
$
(22,824
)
Amounts reclassified out of AOCI
 
667

Balance at end of period
 
$
(22,157
)
Nine months ended September 30, 2015:
 
 
Balance at beginning of period
 
$
(24,158
)
Amounts reclassified out of AOCI
 
2,001

Balance at end of period
 
$
(22,157
)
Three months ended September 30, 2014:
 
 
Balance at beginning of period
 
$
(15,689
)
Amounts reclassified out of AOCI
 
432

Balance at end of period
 
$
(15,257
)
Nine months ended September 30, 2014:
 
 
Balance at beginning of period
 
$
(16,553
)
Amounts reclassified out of AOCI
 
1,296

Balance at end of period
 
$
(15,257
)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
The table below presents amounts reclassified out of components of AOCI and the income statement location of those amounts reclassified during the three and nine months ended September 30, 2015 and 2014 (in thousands of dollars). Items in parentheses indicate increases to net income.
 
 
Amount Reclassified from AOCI
Details About AOCI
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
 
2015
 
2014
 
2015
 
2014
Amortization of defined benefit pension items(1)
 
 
 
 
 
 
 
 
Prior service cost
 
$
47

 
$
55

 
$
139

 
$
165

Net loss
 
1,048

 
654

 
3,146

 
1,963

Total before tax
 
1,095

 
709

 
3,285

 
2,128

Tax benefit(2)
 
(428
)
 
(277
)
 
(1,284
)
 
(832
)
Net of tax
 
667

 
432

 
2,001

 
1,296

Total reclassification for the period
 
$
667

 
$
432

 
$
2,001

 
$
1,296

(1) Amortization of these items is included in IDACORP's condensed consolidated income statements in other operating expenses and in Idaho Power's condensed consolidated income statements in other expense, net.
(2) The tax benefit is included in income tax expense in the condensed consolidated income statements of both IDACORP and Idaho Power.