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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Notes)
9 Months Ended
Sep. 30, 2021
Statement of Comprehensive Income [Abstract]  
Changes in Accumulated Other Comprehensive Income [Text Block] CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME
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, 2021 and 2020 (in thousands). Items in parentheses indicate charges to AOCI.
Defined Benefit Pension ItemsDefined Benefit Pension Items
Three months ended
September 30,
Nine months ended
September 30,
2021202020212020
Balance at beginning of period$(41,686)$(34,790)$(43,358)$(36,284)
Amounts reclassified out of AOCI836 747 2,508 2,241 
Balance at end of period$(40,850)$(34,043)$(40,850)$(34,043)

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, 2021 and 2020 (in thousands). Items in parentheses indicate increases to net income.
Amount Reclassified from AOCI
Details About AOCIThree months ended
September 30,
Nine months ended
September 30,
2021202020212020
Amortization of defined benefit pension items(1)
Prior service cost$74 $73 $222 $218 
Net loss1,052 933 3,155 2,800 
Total before tax1,126 1,006 3,377 3,018 
Tax benefit(2)
(290)(259)(869)(777)
Total reclassification for the period, net of tax$836 $747 $2,508 $2,241 
(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 statements of income in other expense, net.
(2) The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.