XML 44 R23.htm IDEA: XBRL DOCUMENT
v3.24.3

Accumulated Other Comprehensive Loss | 9 Months Ended
--- | ---
Sep. 30, 2024
Accumulated Other Comprehensive Loss [Abstract] |
Accumulated Other Comprehensive Loss | NOTE 13. ACCUMULATED OT HER COMPREHENSIVE LOSS Accumulated other comprehensive loss, net of tax, consisted of the following as of September 30, 2024 and December 31, 2023 (dollars in thousands):
|  | September 30, 2024 |  |  | December 31, 2023 |
Unfunded benefit obligation for pensions and other postretirement benefit plans - net of taxes of $100 and $95, respectively |  | $ | 375 |  |  | $ | 357 |
The following table details the reclassifications out of accumulated other comprehensive loss by component for the three and nine months ended September 30 (dollars in thousands):
|  | Amounts Reclassified from Accumulated Other Comprehensive Loss |
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
Details about Accumulated Other Comprehensive Loss Components (Affected Line Item in Statement of Income) |  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Amortization of defined benefit pension and postretirement benefit items |  |  |  |  |  |  |  |  |  |  |  |
Amortization of net prior service cost (1) |  | $ | (137 | ) |  | $ | (140 | ) |  | $ | (414 | ) |  | $ | (420 | )
Amortization of net loss (1) |  |  | 780 |  |  |  | 1,130 |  |  |  | 2,318 |  |  |  | 3,679 |
Adjustment due to effects of regulation (1) |  |  | (655 | ) |  |  | (1,014 | ) |  |  | (1,927 | ) |  |  | (3,330 | )
Total before tax (2) |  |  | (12 | ) |  |  | (24 | ) |  |  | (23 | ) |  |  | (71 | )
Tax expense (2) |  |  | 3 |  |  |  | 5 |  |  |  | 5 |  |  |  | 15 |
Net of tax (2) |  | $ | (9 | ) |  | $ | (19 | ) |  | $ | (18 | ) |  | $ | (56 | )
(1) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 6 for additional details). (2) Description is also the affected line item on the Condensed Consolidated Statements of Income.

X
- Definition Accumulated Other Comprehensive Loss [Abstract] + References No definition available. + Details
Name: | ava_AccumulatedOtherComprehensiveLossAbstract
Namespace Prefix: | ava_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
Name: | us-gaap_ComprehensiveIncomeNoteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration