$AVA
AVISTA CORP Stock $ava

$ava Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000095017023003546 Filed on February 22, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$474.6M	$510.1M	$1.710B
YoY Change	2.72%	18.14%	18.85%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin			$6.553M
YoY Change			6.55%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$65.22M	$64.18M	$253.1M
YoY Change	4.17%	1.98%	9.03%
% of Gross Profit
Operating Expenses	$398.0M	$446.6M	$1.520B
YoY Change	5.0%	23.55%	25.54%
Operating Profit	$76.60M		$190.2M
YoY Change	-7.68%		-16.65%
Interest Expense	-$34.81M	-$31.11M	-$115.0M
YoY Change	28.5%	20.13%	12.54%
% of Operating Profit	-45.45%		-60.44%
Other Income/Expense, Net	$6.429M	$39.97M	$62.72M
YoY Change	32.53%	329.49%	88.35%
Pretax Income	$48.22M	$72.44M	$138.0M
YoY Change	-20.6%	34.71%	-13.42%
Income Tax	-$6.628M	-$5.513M	-$17.19M
% Of Pretax Income	-13.75%	-7.61%	-12.46%
Net Earnings	$54.85M	$77.96M	$155.2M
YoY Change	-23.36%	53.22%	5.32%
Net Earnings / Revenue	11.56%	15.28%	9.07%
Basic Earnings Per Share	$0.73		$2.13
Diluted Earnings Per Share	$0.73	$1.05	$2.12
COMMON SHARES
Basic Shares Outstanding	75.03M	73.78M	72.99M
Diluted Shares Outstanding	75.28M		73.09M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$10.60M	$13.43M	$13.43M
YoY Change	-94.8%	-39.43%	-39.43%
Cash & Equivalents	$10.60M	$13.43M	$13.43M
Short-Term Investments
Other Short-Term Assets	$116.7M	$151.2M	$314.2M
YoY Change	32.36%	87.19%	231.02%
Inventory	$101.8M	$107.7M	$107.7M
Prepaid Expenses	$47.25M	$30.20M
Receivables	$216.6M	$255.7M	$255.7M
Other Receivables	$27.81M	$30.74M	$30.74M
Total Short-Term Assets	$655.7M	$721.8M	$721.8M
YoY Change	10.0%	66.13%	66.13%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.580B	$5.553B	$5.553B
YoY Change	4.06%	4.0%	4.0%
Goodwill	$52.43M	$52.43M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$219.5M	$70.20M	$213.4M
YoY Change	47.32%	-50.65%	49.99%
Other Assets	$15.72M	$15.22M	$858.8M
YoY Change	-12.78%	79.28%	-1.3%
Total Long-Term Assets	$6.738B	$6.696B	$6.696B
YoY Change	4.63%	4.31%	4.31%
TOTAL ASSETS
Total Short-Term Assets	$655.7M	$721.8M	$721.8M
Total Long-Term Assets	$6.738B	$6.696B	$6.696B
Total Assets	$7.394B	$7.417B	$7.417B
YoY Change	5.09%	8.23%	8.23%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$112.2M	$203.0M	$203.0M
YoY Change	0.09%	52.49%	52.49%
Accrued Expenses	$34.58M	$49.69M	$93.06M
YoY Change	-14.65%	28.7%	1.94%
Deferred Revenue
YoY Change
Short-Term Debt	$231.0M	$463.0M	$463.0M
YoY Change		63.03%	63.03%
Long-Term Debt Due	$13.50M	$13.50M	$16.74M
YoY Change	-94.6%	-94.6%	-93.39%
Total Short-Term Liabilities	$604.6M	$964.5M	$964.5M
YoY Change	-5.82%	5.63%	5.63%
LONG-TERM LIABILITIES
Long-Term Debt	$2.530B	$2.281B	$2.375B
YoY Change	10.28%	20.16%	19.01%
Other Long-Term Liabilities	$194.8M	$175.9M	$1.039B
YoY Change	10.02%	-1.27%	-7.04%
Total Long-Term Liabilities	$2.725B	$2.457B	$3.414B
YoY Change	10.26%	18.32%	9.66%
TOTAL LIABILITIES
Total Short-Term Liabilities	$604.6M	$964.5M	$964.5M
Total Long-Term Liabilities	$2.725B	$2.457B	$3.414B
Total Liabilities	$5.009B	$5.083B	$5.083B
YoY Change	4.29%	8.17%	8.17%
SHAREHOLDERS EQUITY
Retained Earnings	$831.7M	$811.5M
YoY Change	0.74%	3.3%
Common Stock	$1.556B	$1.525B
YoY Change	9.67%	10.51%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.385B	$2.335B	$2.335B
YoY Change
Total Liabilities & Shareholders Equity	$7.394B	$7.417B	$7.417B
YoY Change	5.09%	8.23%	8.23%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$54.85M	$77.96M	$155.2M
YoY Change	-23.36%	53.22%	5.32%
Depreciation, Depletion And Amortization	$65.22M	$64.18M	$253.1M
YoY Change	4.17%	1.98%	9.03%
Cash From Operating Activities	$94.25M	-$86.21M	$124.2M
YoY Change	-41.77%	-324.35%	-53.54%
INVESTING ACTIVITIES
Capital Expenditures	$100.5M	$120.7M	$452.0M
YoY Change	4.69%	-203.04%	2.74%
Acquisitions
YoY Change
Other Investing Activities	-$518.0K	$759.0K	-$4.144M
YoY Change	-3.54%	-188.77%	-190.9%
Cash From Investing Activities	-$106.3M	-$119.9M	-$460.2M
YoY Change	11.05%	1.65%	3.44%
FINANCING ACTIVITIES
Cash Dividend Paid	$35.03M		$129.1M
YoY Change	9.57%		9.18%
Common Stock Issuance & Retirement, Net			$137.8M
YoY Change			53.11%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	9.175M	205.2M	327.3M
YoY Change	-92.04%	148.71%	76.39%
NET CHANGE
Cash From Operating Activities	94.25M	-86.21M	124.2M
Cash From Investing Activities	-106.3M	-119.9M	-460.2M
Cash From Financing Activities	9.175M	205.2M	327.3M
Net Change In Cash	-2.832M	-935.0K	-8.740M
YoY Change	-101.56%	-131.76%	-209.63%
FREE CASH FLOW
Cash From Operating Activities	$94.25M	-$86.21M	$124.2M
Capital Expenditures	$100.5M	$120.7M	$452.0M
Free Cash Flow	-$6.244M	-$206.9M	-$327.8M
YoY Change	-109.48%	-233.0%	89.91%

Facts In Submission

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CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-03701
CY2022	dei	Entity Registrant Name EntityRegistrantName	AVISTA CORPORATION
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-0462470
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	1411 East Mission Avenue
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Spokane
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	99202-2600
CY2022	dei	City Area Code CityAreaCode	509
CY2022	dei	Local Phone Number LocalPhoneNumber	489-0500
CY2022	dei	Security12b Title Security12bTitle	Common Stock
CY2022	dei	Trading Symbol TradingSymbol	AVA
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	3175189328
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	75030135
CY2022	dei	Auditor Firm AuditorFirmId	34
CY2022	dei	Auditor Name AuditorName	Deloitte & Touche LLP
CY2022	dei	Auditor Location AuditorLocation	Portland, Oregon
CY2022	ava	Regulated Revenues Excluding Alternative Revenue Programs RegulatedRevenuesExcludingAlternativeRevenuePrograms	1742876000
CY2021	ava	Regulated Revenues Excluding Alternative Revenue Programs RegulatedRevenuesExcludingAlternativeRevenuePrograms	1445000000
CY2020	ava	Regulated Revenues Excluding Alternative Revenue Programs RegulatedRevenuesExcludingAlternativeRevenuePrograms	1324091000
CY2022	ava	Revenue From Alternative Revenue Programs RevenueFromAlternativeRevenuePrograms	-33357000
CY2021	ava	Revenue From Alternative Revenue Programs RevenueFromAlternativeRevenuePrograms	-6635000
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CY2022	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	405165000
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CY2021	us-gaap	Utilities Operating Expense Products And Services UtilitiesOperatingExpenseProductsAndServices	497123000
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CY2021	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	109353000
CY2020	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	106501000
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CY2022	ava	Interest Expense Excluding Interest Expense To Related Party InterestExpenseExcludingInterestExpenseToRelatedParty	117634000
CY2021	ava	Interest Expense Excluding Interest Expense To Related Party InterestExpenseExcludingInterestExpenseToRelatedParty	105731000
CY2020	ava	Interest Expense Excluding Interest Expense To Related Party InterestExpenseExcludingInterestExpenseToRelatedParty	104348000
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CY2021Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	203035000
CY2022Q4	us-gaap	Inventory Net InventoryNet	107674000
CY2021Q4	us-gaap	Inventory Net InventoryNet	84733000
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	193787000
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	43783000
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	151167000
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	80754000
CY2022Q4	us-gaap	Assets Current AssetsCurrent	721802000
CY2021Q4	us-gaap	Assets Current AssetsCurrent	434473000
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5444709000
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5225515000
CY2022Q4	us-gaap	Goodwill Goodwill	52426000
CY2021Q4	us-gaap	Goodwill Goodwill	52426000
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	833328000
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	860626000
CY2022Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	365085000
CY2021Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	280543000
CY2022Q4	us-gaap	Assets Assets	7417350000
CY2021Q4	us-gaap	Assets Assets	6853583000
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	202954000
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	133096000
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	13500000
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	250000000
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	77149000
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	463000000
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	284000000
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	95665000
CY2021	ava	Power And Natural Gas Cost Amortization Deferrals Net PowerAndNaturalGasCostAmortizationDeferralsNet	-51847000
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	189415000
CY2020	ava	Power And Natural Gas Cost Amortization Deferrals Net PowerAndNaturalGasCostAmortizationDeferralsNet	-9923000
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	168861000
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	964534000
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	913106000
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2281013000
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1898370000
CY2022Q4	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	51547000
CY2021Q4	us-gaap	Due To Related Parties Noncurrent DueToRelatedPartiesNoncurrent	51547000
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	93901000
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	153467000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	674995000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	642709000
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	840837000
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	861515000
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	175855000
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	178125000
CY2022Q4	us-gaap	Liabilities Liabilities	5082682000
CY2021Q4	us-gaap	Liabilities Liabilities	4698839000
CY2022Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2021Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	74945948
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	74945948
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	71497523
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	71497523
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	1525185000
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	1380152000
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2058000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11039000
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	811541000
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	785631000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2334668000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2154744000
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7417350000
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6853583000
CY2022	us-gaap	Profit Loss ProfitLoss	155176000
CY2021	us-gaap	Profit Loss ProfitLoss	147334000
CY2020	us-gaap	Profit Loss ProfitLoss	129488000
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	253142000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	232176000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	224223000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-18231000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	11224000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	44964000
CY2022	ava	Power And Natural Gas Cost Amortization Deferrals Net PowerAndNaturalGasCostAmortizationDeferralsNet	-78350000
CY2022	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1974000
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2606000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	5846000
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3237000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8717000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	4713000
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6704000
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	7004000
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6970000
CY2022	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	32173000
CY2021	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	29077000
CY2020	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	33812000
CY2022	ava	Other Regulatory Assets And Liabilities Deferred Debits And Credits OtherRegulatoryAssetsAndLiabilitiesDeferredDebitsAndCredits	20409000
CY2021	ava	Other Regulatory Assets And Liabilities Deferred Debits And Credits OtherRegulatoryAssetsAndLiabilitiesDeferredDebitsAndCredits	-676000
CY2020	ava	Other Regulatory Assets And Liabilities Deferred Debits And Credits OtherRegulatoryAssetsAndLiabilitiesDeferredDebitsAndCredits	-10287000
CY2022	ava	Adjustment In Decoupling Regulatory Deferral AdjustmentInDecouplingRegulatoryDeferral	-33469000
CY2021	ava	Adjustment In Decoupling Regulatory Deferral AdjustmentInDecouplingRegulatoryDeferral	-6056000
CY2020	ava	Adjustment In Decoupling Regulatory Deferral AdjustmentInDecouplingRegulatoryDeferral	-2971000
CY2022	ava	Realized And Unrealized Gains On Assets And Investments RealizedAndUnrealizedGainsOnAssetsAndInvestments	50006000
CY2021	ava	Realized And Unrealized Gains On Assets And Investments RealizedAndUnrealizedGainsOnAssetsAndInvestments	23187000
CY2020	ava	Realized And Unrealized Gains On Assets And Investments RealizedAndUnrealizedGainsOnAssetsAndInvestments	5170000
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	11957000
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-2859000
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	2373000
CY2022	us-gaap	Pension Contributions PensionContributions	42000000
CY2021	us-gaap	Pension Contributions PensionContributions	42000000
CY2020	us-gaap	Pension Contributions PensionContributions	22000000
CY2022	ava	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	17035000
CY2021	ava	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	17568000
CY2020	ava	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	33499000
CY2021	ava	Proceeds From Settlement Of Derivative Instruments ProceedsFromSettlementOfDerivativeInstruments	324000
CY2022	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	56007000
CY2021	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	46107000
CY2020	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	10960000
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	22941000
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	17282000
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	868000
CY2022	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	141014000
CY2021	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	17564000
CY2020	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-1579000
CY2022	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	1125000
CY2021	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-20199000
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	41363000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	6613000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-930000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2401000
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	65928000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	33369000
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-10152000
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	22106000
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4074000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	124207000
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	15530000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	267340000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	331004000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	451995000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	439939000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	404306000
CY2022	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	2745000
CY2021	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	1841000
CY2020	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	4393000
CY2022	ava	Payments To Acquire Equity And Property Investments PaymentsToAcquireEquityAndPropertyInvestments	10642000
CY2021	ava	Payments To Acquire Equity And Property Investments PaymentsToAcquireEquityAndPropertyInvestments	16001000
CY2020	ava	Payments To Acquire Equity And Property Investments PaymentsToAcquireEquityAndPropertyInvestments	5925000
CY2022	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	1000000
CY2021	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	8306000
CY2020	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	6786000
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4144000
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4559000
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2905000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-460238000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-444916000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-410743000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	179000000
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	81000000
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	17200000
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	399856000
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	140000000
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	165000000
CY2022	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	253085000
CY2021	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2935000
CY2020	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	54800000
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	137778000
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	89998000
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	72200000
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	129061000
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	118211000
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	110254000
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-7197000
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-4304000
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5307000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	327291000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	185548000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	84039000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-8740000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	7972000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	4300000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	22168000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	14196000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	9896000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	13428000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	22168000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	14196000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	107468000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	98592000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	97717000
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	2251000
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	3652000
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	1901000
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	86000
CY2021	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	22330000
CY2020	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	918000
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	27708000
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	23938000
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	32039000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2334668000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2154744000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2029726000
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.76
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.69
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.62
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1589000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5846000
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	-165000
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	990000
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1228000
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;font-style:italic;min-width:fit-content;">Use of Estimates</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:5.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported for assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include:</span></p><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">determining the market value of energy commodity derivative assets and liabilities,</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">pension and other postretirement benefit plan obligations,</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">contingent liabilities,</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">goodwill impairment testing,</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">fair value of equity investments,</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">recoverability of regulatory assets, and</span></div></div><div style="margin-left:6.667%;text-indent:0.0%;display:flex;margin-top:6.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:6.667%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:7.14323979728499%;">•</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">unbilled revenues.</span></div></div><p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Changes in these estimates and assumptions are considered reasonably possible and may have a material effect on the consolidated financial statements and thus actual results could differ from the amounts reported and disclosed herein.</span></p>
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7567000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4713000
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	19000
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	-909000
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	1957000
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	1943000
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	1952000
CY2022	ava	Interest On Regulatory Deferrals InterestOnRegulatoryDeferrals	1914000
CY2021	ava	Interest On Regulatory Deferrals InterestOnRegulatoryDeferrals	1206000
CY2020	ava	Interest On Regulatory Deferrals InterestOnRegulatoryDeferrals	1222000
CY2022	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6704000
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	7004000
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	6970000
CY2022	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-3037000
CY2021	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	1386000
CY2020	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	6433000
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	48492000
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	21402000
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	905000
CY2022	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	613000
CY2021	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	3129000
CY2020	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	201000
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	62717000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	33298000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4817000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	10465000
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11387000
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2419000
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	149000
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	9279000
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11280000
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	4141000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	10201000
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2312000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6473000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	10465000
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11387000
CY2022	ava	Government Grants GovernmentGrants	6100000
CY2022Q4	us-gaap	Goodwill Goodwill	52426000
CY2022	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;font-style:italic;min-width:fit-content;">Derivative Assets and Liabilities</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:5.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Derivatives are recorded as either assets or liabilities on the Consolidated Balance Sheets measured at estimated fair value.</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">The WUTC and the IPUC issued accounting orders authorizing Avista Corp. to offset energy commodity derivative assets or liabilities with a regulatory asset or liability. This accounting treatment is intended to defer the recognition of mark-to-market gains and losses on energy commodity transactions until the period of delivery. Realized benefits and costs result in adjustments to retail rates through PGAs, the ERM in Washington, the PCA mechanism in Idaho, and periodic general rates cases. The resulting regulatory assets associated with energy commodity derivative instruments have been concluded to be probable of recovery through future rates.</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Substantially all forward contracts to purchase or sell power and natural gas are recorded as derivative assets or liabilities at estimated fair value with an offsetting regulatory asset or liability. Contracts that are not considered derivatives are accounted for on the accrual basis until they are settled or realized unless there is a decline in the fair value of the contract that is determined to be other-than-temporary.</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">For interest rate swap derivatives, Avista Corp. records all mark-to-market gains and losses in each accounting period as assets and liabilities, as well as offsetting regulatory assets and liabilities, such that there is no income statement impact. The interest rate swap derivatives are risk management tools similar to energy commodity derivatives. Upon settlement of interest rate swap derivatives, the regulatory asset or liability is amortized as a component of interest expense over the term of the associated debt. The Company records an offset of interest rate swap derivative assets and liabilities with regulatory assets and liabilities, based on the prior practice of the commissions to provide recovery through the ratemaking process.</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:6.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">The Company has multiple master netting agreements with a variety of entities that allow for cross-commodity netting of derivative agreements with the same counterparty (i.e. power derivatives can be netted with natural gas derivatives). In addition, some master netting agreements allow for the netting of commodity derivatives and interest rate swap derivatives for the same counterparty. The Company does not have any agreements which allow for cross-affiliate netting among multiple affiliated legal entities. The Company nets all derivative instruments when allowed by the agreement for presentation in the Consolidated Balance Sheets.</span></p>
CY2022Q4	us-gaap	Retained Earnings Appropriated RetainedEarningsAppropriated	57231000
CY2021Q4	us-gaap	Retained Earnings Appropriated RetainedEarningsAppropriated	53620000
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	75766000
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	62003000
CY2022Q4	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	26788000
CY2021Q4	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	17604000
CY2022Q4	us-gaap	Other Inventory OtherInventory	5120000
CY2021Q4	us-gaap	Other Inventory OtherInventory	5126000
CY2022Q4	us-gaap	Inventory Net InventoryNet	107674000
CY2021Q4	us-gaap	Inventory Net InventoryNet	84733000
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	66142000
CY2021Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	21477000
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	30201000
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	24387000
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	30740000
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	29615000
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	18198000
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	1442000
CY2022Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	5886000
CY2021Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	3833000
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	151167000
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	80754000
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	147809000
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	91057000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	68238000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	70133000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	40056000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	43697000
CY2022Q4	ava	Non Regulated Property NonRegulatedProperty	25401000
CY2021Q4	ava	Non Regulated Property NonRegulatedProperty	20033000
CY2022Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	17954000
CY2021Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	14949000
CY2022Q4	ava	Long Term Prepaid License Fees LongTermPrepaidLicenseFees	17936000
CY2021Q4	ava	Long Term Prepaid License Fees LongTermPrepaidLicenseFees	8465000
CY2022Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	13382000
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	11547000
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	11547000
CY2022Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	7541000
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	9513000
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	15221000
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	11149000
CY2022Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	365085000
CY2021Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	280543000
CY2022Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	38568000
CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	41706000
CY2022Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	29279000
CY2021Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	27741000
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	20863000
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	17538000
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	15625000
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	13582000
CY2022Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	26910000
CY2021Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	28801000
CY2022Q4	ava	Deferred Wholesale Revenue DeferredWholesaleRevenue	8481000
CY2021Q4	ava	Deferred Wholesale Revenue DeferredWholesaleRevenue	884000
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	49689000
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	38609000
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	189415000
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	168861000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	64284000
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	66068000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	42495000
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	45730000
CY2022Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	28784000
CY2021Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	29313000
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	15783000
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17142000
CY2022Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	7892000
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	4525000
CY2022Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	16617000
CY2021Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	15347000
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	175855000
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	178125000
CY2022Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	81691000
CY2021Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	74479000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	43697000
CY2022	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	69931000
CY2021	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	62736000
CY2020	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	59319000
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	11700000
CY2022	us-gaap	Revenues Revenues	1710207000
CY2021	us-gaap	Revenues Revenues	1438936000
CY2020	us-gaap	Revenues Revenues	1321891000
CY2022	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	4986000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	4970000
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	1567000
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	1180000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3641000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3641000
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	2375000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	2522000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	4828000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	4805000
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	2375000
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	2522000
CY2022	ava	Total Lease Paymentsin Operating Cash Flows TotalLeasePaymentsinOperatingCashFlows	7203000
CY2021	ava	Total Lease Paymentsin Operating Cash Flows TotalLeasePaymentsinOperatingCashFlows	7327000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3085000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2935000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	68238000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	70133000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4349000
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4301000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	64284000
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	66068000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	68633000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	70369000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	40056000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3235000
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3085000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	42495000
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	45730000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	45730000
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	48815000
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P23Y3M10D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P24Y2M19D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y5M1D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P6Y3M25D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0428
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0428
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0407
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0435
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7371985000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4850000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	5456000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4877000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5459000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4884000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	5454000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4869000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	5456000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4880000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	5458000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	86991000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	32748000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	111351000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	60031000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	42718000
CY2022Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	14301000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	68633000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	45730000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4820000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	5460000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4849000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5456000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4875000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	5459000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4882000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	5454000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4867000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	5456000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	91845000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	38204000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	116138000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	65489000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	45769000
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	16674000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	70369000
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	48815000
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	70196000
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	66896000
CY2022Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	147809000
CY2021Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	91057000
CY2022	ava	Gains Losses On Equity Securities Without Readily Determinable Fair Value GainsLossesOnEquitySecuritiesWithoutReadilyDeterminableFairValue	45667000
CY2021	ava	Gains Losses On Equity Securities Without Readily Determinable Fair Value GainsLossesOnEquitySecuritiesWithoutReadilyDeterminableFairValue	8761000
CY2020	ava	Gains Losses On Equity Securities Without Readily Determinable Fair Value GainsLossesOnEquitySecuritiesWithoutReadilyDeterminableFairValue	925000
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	14800000
CY2022Q4	us-gaap	Number Of Foreign Currency Derivatives Held NumberOfForeignCurrencyDerivativesHeld	19
CY2021Q4	us-gaap	Number Of Foreign Currency Derivatives Held NumberOfForeignCurrencyDerivativesHeld	25
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	157704000
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	276846000
CY2022Q4	us-gaap	Derivative Fair Value Amount Offset Against Collateral Net DerivativeFairValueAmountOffsetAgainstCollateralNet	105439000
CY2022Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-13703000
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	36581000
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	74940000
CY2021Q4	us-gaap	Derivative Fair Value Amount Offset Against Collateral Net DerivativeFairValueAmountOffsetAgainstCollateralNet	9089000
CY2021Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-29270000
CY2022Q4	us-gaap	Jointly Owned Utility Plant Proportionate Ownership Share JointlyOwnedUtilityPlantProportionateOwnershipShare	0.15
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	7561688000
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	7166580000
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	164147000
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	205405000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7725835000
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7371985000
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2281126000
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2146470000
CY2022Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5444709000
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	5225515000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7725835000
CY2022Q4	ava	Property Plant And Equipment Total PropertyPlantAndEquipmentTotal	7742466000
CY2021Q4	ava	Property Plant And Equipment Total PropertyPlantAndEquipmentTotal	7389803000
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17142000
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17194000
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	20338000
CY2021	ava	Asset Retirement Obligation Increase Decrease In Liabilities Incurred AssetRetirementObligationIncreaseDecreaseInLiabilitiesIncurred	825000
CY2020	ava	Asset Retirement Obligation Increase Decrease In Liabilities Incurred AssetRetirementObligationIncreaseDecreaseInLiabilitiesIncurred	-2315000
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1964000
CY2021	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1541000
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1645000
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	605000
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	664000
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	816000
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	15783000
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17142000
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	17194000
CY2022	us-gaap	Pension Contributions PensionContributions	42000000.0
CY2021	us-gaap	Pension Contributions PensionContributions	42000000.0
CY2020	us-gaap	Pension Contributions PensionContributions	22000000.0
CY2022	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	11800000
CY2022	ava	Percentage Of Service Related Net Periodic Benefit Costs Capitalized To Utility Property PercentageOfServiceRelatedNetPeriodicBenefitCostsCapitalizedToUtilityProperty	0.40
CY2022	ava	Percentage Of Service Related Net Periodic Benefit Costs Recorded To Operating Expenses PercentageOfServiceRelatedNetPeriodicBenefitCostsRecordedToOperatingExpenses	0.60
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	13258000
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	11671000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	11742000
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1040000
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	807000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-37913000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-18231000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	11224000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	44964000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-17191000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12031000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7051000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	28977000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	33467000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	28673000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferences	-12366000
CY2022	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences Percent TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferencesPercent	-0.090
CY2021	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferences	-13820000
CY2021	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences Percent TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferencesPercent	-0.087
CY2020	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferences	-12893000
CY2020	ava	Tax Effect Of Regulatory Treatment Of Utility Plant Differences Percent TaxEffectOfRegulatoryTreatmentOfUtilityPlantDifferencesPercent	-0.094
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1676000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.012
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1385000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.008
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	814000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006
CY2022	ava	Income Tax Reconciliation Flow Through Related To Deduction Of Meters And Mixed Service Costs IncomeTaxReconciliationFlowThroughRelatedToDeductionOfMetersAndMixedServiceCosts	-34454000
CY2022	ava	Effective Income Tax Reconciliation Flow Through Related To Deduction Of Meters And Mixed Service Cost EffectiveIncomeTaxReconciliationFlowThroughRelatedToDeductionOfMetersAndMixedServiceCost	-0.250
CY2021	ava	Income Tax Reconciliation Flow Through Related To Deduction Of Meters And Mixed Service Costs IncomeTaxReconciliationFlowThroughRelatedToDeductionOfMetersAndMixedServiceCosts	-8678000
CY2021	ava	Effective Income Tax Reconciliation Flow Through Related To Deduction Of Meters And Mixed Service Cost EffectiveIncomeTaxReconciliationFlowThroughRelatedToDeductionOfMetersAndMixedServiceCost	-0.054
CY2020	ava	Effective Income Tax Rate Reconciliation Excess Deferred Income Tax Reversal Amount EffectiveIncomeTaxRateReconciliationExcessDeferredIncomeTaxReversalAmount	8476000
CY2020	ava	Effective Income Tax Rate Reconciliation Excess Deferred Income Tax Reversal Percent EffectiveIncomeTaxRateReconciliationExcessDeferredIncomeTaxReversalPercent	-0.062
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2020	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-1189000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.009
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1024000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-323000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	122000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-17191000
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.125
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12031000
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.075
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7051000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.052
CY2022Q4	ava	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	197998000
CY2021Q4	ava	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	200513000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	74782000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	64994000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	20132000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	25650000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	54903000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	38181000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	347815000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	329338000
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3874000
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	9626000
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	343941000
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	319712000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	712470000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	688856000
CY2022Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	281483000
CY2021Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	264978000
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	24983000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	8587000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1018936000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	962421000
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	674995000
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	642709000
CY2022	ava	Utility Power Resources UtilityPowerResources	660967000
CY2021	ava	Utility Power Resources UtilityPowerResources	431199000
CY2020	ava	Utility Power Resources UtilityPowerResources	324297000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	376090000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	294410000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	279406000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	242793000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	224181000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	2654332000
CY2022Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	4071212000
CY2022	us-gaap	Long Term Contract For Purchase Of Electric Power Amount Of Long Term Debt Or Lease Obligation Outstanding LongTermContractForPurchaseOfElectricPowerAmountOfLongTermDebtOrLeaseObligationOutstanding	281000000.0
CY2022Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	0
CY2022Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	100000000
CY2022Q4	us-gaap	Secured Debt SecuredDebt	2382200000
CY2021Q4	us-gaap	Secured Debt SecuredDebt	2232200000
CY2022Q4	ava	Securedand Unsecured Debt SecuredandUnsecuredDebt	2397200000
CY2021Q4	ava	Securedand Unsecured Debt SecuredandUnsecuredDebt	2247200000
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	726000
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	632000
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	18261000
CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	14498000
CY2022Q4	ava	Long Term Debt Before Current Portion And Bonds Held By Company LongTermDebtBeforeCurrentPortionAndBondsHeldByCompany	2378213000
CY2021Q4	ava	Long Term Debt Before Current Portion And Bonds Held By Company LongTermDebtBeforeCurrentPortionAndBondsHeldByCompany	2232070000
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	13500000
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	250000000
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2281013000
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1898370000
CY2022Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	250000000.0
CY2000	us-gaap	Payments For Repurchase Of Trust Preferred Securities PaymentsForRepurchaseOfTrustPreferredSecurities	10000000.0
CY2022Q4	ava	Number Of Equity Investments Measured At Fair Value On Recurring Basic NumberOfEquityInvestmentsMeasuredAtFairValueOnRecurringBasic	2
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	ava	Amount Available For Dividend Distribution Without Affecting Covenants AmountAvailableForDividendDistributionWithoutAffectingCovenants	258600000
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	137800000
CY2022Q4	ava	Accumulated Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Tax AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossTax	547000
CY2021Q4	ava	Accumulated Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Tax AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossTax	2934000
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-2058000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-11039000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	155176000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	147334000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	129488000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72989000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	69951000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	67962000
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	104000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	134000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	140000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73093000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	70085000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68102000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.13
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.11
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.91
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.12
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.10
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.90
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2022Q4	ava	Regulatory Asset Earning Return RegulatoryAssetEarningReturn	712914000
CY2022Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	285816000
CY2022Q4	us-gaap	Amount Of Regulatory Costs Not Yet Approved AmountOfRegulatoryCostsNotYetApproved	28385000
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	193787000
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	833328000
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	43783000
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	860626000
CY2022Q4	ava	Regulatory Liability Earning Return RegulatoryLiabilityEarningReturn	853865000
CY2022Q4	ava	Remaining Amounts Of Regulatory Liabilities For Which No Interest During Recovery Period Is Provided RemainingAmountsOfRegulatoryLiabilitiesForWhichNoInterestDuringRecoveryPeriodIsProvided	51628000
CY2022Q4	ava	Pending Regulatory Treatment Liability PendingRegulatoryTreatmentLiability	31009000
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	95665000
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	840837000
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	77149000
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	861515000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	ava	Threshold Limit Of Deadband And Sharing Bands For Future Surcharge Or Rebate To Customer ThresholdLimitOfDeadbandAndSharingBandsForFutureSurchargeOrRebateToCustomer	4000000.0
CY2022	ava	Company Shareof Benefit Expense Under Washington Energy Recovery Mechanism CompanyShareofBenefitExpenseUnderWashingtonEnergyRecoveryMechanism	-10900000
CY2021	ava	Company Shareof Benefit Expense Under Washington Energy Recovery Mechanism CompanyShareofBenefitExpenseUnderWashingtonEnergyRecoveryMechanism	-7700000
CY2022Q4	ava	Thresholdto Return Washington Energy Recovery Mechanism Dollarsto Customers ThresholdtoReturnWashingtonEnergyRecoveryMechanismDollarstoCustomers	30000000
CY2022Q4	ava	Thresholdto Return Washington Energy Recovery Mechanism Dollarsto Customers ThresholdtoReturnWashingtonEnergyRecoveryMechanismDollarstoCustomers	30000000
CY2022	ava	Proposed Cumulative Rebate Refund Period ProposedCumulativeRebateRefundPeriod	P1Y
CY2022Q4	us-gaap	Deferred Gas Cost DeferredGasCost	52100000
CY2021Q4	us-gaap	Deferred Gas Cost DeferredGasCost	21000000.0
CY2022	us-gaap	Revenues Revenues	1710207000
CY2022	ava	Utilities Operating Expense Deferrals For Products And Services UtilitiesOperatingExpenseDeferralsForProductsAndServices	735862000
CY2022	ava	Other Operating Expenses OtherOperatingExpenses	416768000
CY2022	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	253142000
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	190242000
CY2022	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	118692000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-17191000
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	155176000
CY2022	ava	Payments To Acquire Property Plant And Equipment Excludes Other Business Expenditure PaymentsToAcquirePropertyPlantAndEquipmentExcludesOtherBusinessExpenditure	452829000
CY2021	us-gaap	Revenues Revenues	1438936000
CY2021	ava	Utilities Operating Expense Deferrals For Products And Services UtilitiesOperatingExpenseDeferralsForProductsAndServices	497123000
CY2021	ava	Other Operating Expenses OtherOperatingExpenses	372052000
CY2021	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	232176000
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	228232000
CY2021	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	106152000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12031000
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	147334000
CY2021	ava	Payments To Acquire Property Plant And Equipment Excludes Other Business Expenditure PaymentsToAcquirePropertyPlantAndEquipmentExcludesOtherBusinessExpenditure	441209000
CY2020	us-gaap	Revenues Revenues	1321891000
CY2020	ava	Utilities Operating Expense Deferrals For Products And Services UtilitiesOperatingExpenseDeferralsForProductsAndServices	398509000
CY2020	ava	Other Operating Expenses OtherOperatingExpenses	359958000
CY2020	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	224223000
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	232700000
CY2020	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	105061000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7051000
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	129488000
CY2020	ava	Payments To Acquire Property Plant And Equipment Excludes Other Business Expenditure PaymentsToAcquirePropertyPlantAndEquipmentExcludesOtherBusinessExpenditure	405674000
CY2022Q4	us-gaap	Assets Assets	7417350000
CY2021Q4	us-gaap	Assets Assets	6853583000
CY2020Q4	us-gaap	Assets Assets	6402097000

Files In Submission

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$AVA
AVISTA CORP Stock $ava

2023 Q1 Form 10-K Financial Statement

#000095017023003546 Filed on February 22, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVA AVISTA CORP Stock $ava

2023 Q1 Form 10-K Financial Statement

#000095017023003546 Filed on February 22, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVA
AVISTA CORP Stock $ava