XML 68 R44.htm IDEA: XBRL DOCUMENT
v3.22.2

Balance Sheet Components - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Regulated Asset Liability [Line Items] |  |
Regulatory assets | $ 44,199 | $ 43,783
Non-current regulatory assets | 839,155 | 860,626
Regulatory liabilities | 94,609 | 77,149
Non-current regulatory liabilities | 846,873 | 861,515
Income Tax Related Liabilities [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 73,207 | 56,331
Non-current regulatory liabilities | 416,719 | 458,789
Energy Commodity Derivatives [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 1,801 | 0
Non-current regulatory liabilities | 522 | 0
Deferred Power Costs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 0 | 6,457
Non-current regulatory liabilities | 6,610 | 5,434
Decoupling Rebate [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 3,624 | 3,049
Non-current regulatory liabilities | 16,330 | 6,259
Utility Plant Retirement Costs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 0 | 0
Non-current regulatory liabilities | 357,367 | 350,190
Interest Rate Swaps [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 0 | 0
Non-current regulatory liabilities | 21,270 | 15,062
COVID-19 Deferrals [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 0 | 0
Non-current regulatory liabilities | 12,049 | 12,500
Other Regulatory Liabilities [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory liabilities | 15,977 | 11,312
Non-current regulatory liabilities | 16,006 | 13,281
Energy Commodity Derivatives [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 12,447
Non-current regulatory assets | 0 | 2,938
Decoupling Surcharge [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 8,834 | 9,907
Non-current regulatory assets | 3,793 | 14,625
Deferred Natural Gas Costs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 29,647 | 14,095
Non-current regulatory assets | 11,323 | 6,932
Deferred Power Costs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 5,300 | 7,334
Non-current regulatory assets | 1,059 | 3,501
Pension and Other Postretirement Benefit Plans [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 162,943 | 165,696
Interest Rate Swaps [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 189,347 | 199,754
Deferred Income Taxes [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 245,893 | 244,154
Settlement with Coeur d'Alene Tribe [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 38,368 | 38,926
AFUDC Above FERC Allowed Rate [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 50,328 | 48,455
Demand Side Management Programs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 3,736 | 3,974
Utility Plant to be Abandoned [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 25,555 | 26,771
COVID-19 Deferrals [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 13,963 | 13,591
Unamortized Debt Repurchase Costs [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 6,434 | 6,768
Advanced Meter Infrastructure [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 0 | 0
Non-current regulatory assets | 34,194 | 36,008
Other Regulatory Assets [Member] |  |
Regulated Asset Liability [Line Items] |  |
Regulatory assets | 418 | 0
Non-current regulatory assets | $ 52,219 | $ 48,533

X
- Definition Regulated Asset Liability [Line Items] + References No definition available. + Details
Name: | ava_RegulatedAssetLiabilityLineItems
Namespace Prefix: | ava_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_IncomeTaxRelatedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_EnergyRelatedDerivativeLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_PowerDeferralsRegulatoryLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_DecouplingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RemovalCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_InterestRateSwapLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_Covid19DeferralLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ava_OtherRegulatoryLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_EnergyRelatedDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_DecouplingSurchargeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_DeferredNaturalGasCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_PowerDeferralsRegulatoryAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_PensionAndOtherPostretirementPlansCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredDerivativeGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_DeferredIncomeTaxChargeAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_RegulatoryAssetSettlementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_AFUDCAboveFERCAllowedRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_DemandSideManagementProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_AssetImpairmentForRegulatoryActionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_COVID19DeferralsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_UnamortizedDebtRepurchaseCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_AdvancedMeteringInfrastructureCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ava_OtherRegulatoryAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |