$AVA
AVISTA CORP Stock $ava

$ava Overview Financials Valuation SEC Filings Company Website

2018 Q2 Form 10-Q Financial Statement

#000010491818000097 Filed on August 01, 2018

Income Statement

Concept	2018 Q2	2017 Q2
Revenue	$319.3M	$314.5M
YoY Change	1.53%	-1.36%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$46.80M	$43.70M
YoY Change	7.09%	7.11%
% of Gross Profit
Operating Expenses	$265.0M	$255.3M
YoY Change	3.8%	-0.74%
Operating Profit	$53.28M	$57.95M
YoY Change	-8.05%	-5.92%
Interest Expense	$25.17M	$23.67M
YoY Change	6.34%	11.03%
% of Operating Profit	47.24%	40.85%
Other Income/Expense, Net	$1.907M	-$193.0K
YoY Change	-1088.08%	-106.35%
Pretax Income	$30.85M	$34.77M
YoY Change	-11.27%	-20.97%
Income Tax	$5.209M	$13.05M
% Of Pretax Income	16.88%	37.53%
Net Earnings	$25.58M	$21.77M
YoY Change	17.48%	-20.12%
Net Earnings / Revenue	8.01%	6.92%
Basic Earnings Per Share	$0.39	$0.34
Diluted Earnings Per Share	$0.39	$0.34
COMMON SHARES
Basic Shares Outstanding	65.68M shares	64.40M shares
Diluted Shares Outstanding	65.98M shares	64.55M shares

Balance Sheet

Concept	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$35.00M	$13.00M
YoY Change	169.23%	-7.14%
Cash & Equivalents	$35.33M	$13.41M
Short-Term Investments
Other Short-Term Assets	$22.52M	$62.40M
YoY Change	-63.92%	56.85%
Inventory	$56.90M	$61.19M
Prepaid Expenses
Receivables	$118.0M	$134.0M
Other Receivables	$0.00	$36.00M
Total Short-Term Assets	$260.0M	$320.7M
YoY Change	-18.94%	19.36%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.486B	$4.227B
YoY Change	6.13%	5.91%
Goodwill	$57.67M	$57.67M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$105.0M	$87.00M
YoY Change	20.69%	3.57%
Other Assets	$594.0M	$148.7M
YoY Change	299.45%	-0.08%
Total Long-Term Assets	$5.242B	$5.052B
YoY Change	3.75%	5.25%
TOTAL ASSETS
Total Short-Term Assets	$260.0M	$320.7M
Total Long-Term Assets	$5.242B	$5.052B
Total Assets	$5.502B	$5.373B
YoY Change	2.4%	6.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$76.56M	$69.17M
YoY Change	10.69%	9.69%
Accrued Expenses	$31.10M	$49.00M
YoY Change	-36.53%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$136.0M
YoY Change	-100.0%	-15.0%
Long-Term Debt Due	$3.000M	$278.0M
YoY Change	-98.92%	198.92%
Total Short-Term Liabilities	$289.1M	$682.1M
YoY Change	-57.62%	35.96%
LONG-TERM LIABILITIES
Long-Term Debt	$1.913B	$1.455B
YoY Change	31.48%	-4.96%
Other Long-Term Liabilities	$69.43M	$162.2M
YoY Change	-57.18%	-1.97%
Total Long-Term Liabilities	$69.43M	$162.2M
YoY Change	-57.18%	-1.97%
TOTAL LIABILITIES
Total Short-Term Liabilities	$289.1M	$682.1M
Total Long-Term Liabilities	$69.43M	$162.2M
Total Liabilities	$3.739B	$3.686B
YoY Change	1.44%	6.77%
SHAREHOLDERS EQUITY
Retained Earnings	$637.6M	$618.7M
YoY Change	3.05%	8.06%
Common Stock	$1.134B	$1.076B
YoY Change	5.45%	2.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.762B	$1.687B
YoY Change
Total Liabilities & Shareholders Equity	$5.502B	$5.373B
YoY Change	2.4%	6.0%

Cashflow Statement

Concept	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$25.58M	$21.77M
YoY Change	17.48%	-20.12%
Depreciation, Depletion And Amortization	$46.80M	$43.70M
YoY Change	7.09%	7.11%
Cash From Operating Activities	$90.60M	$78.80M
YoY Change	14.97%	61.48%
INVESTING ACTIVITIES
Capital Expenditures	-$101.3M	-$90.90M
YoY Change	11.44%	-3.3%
Acquisitions
YoY Change
Other Investing Activities	-$4.300M	-$8.800M
YoY Change	-51.14%	-57.89%
Cash From Investing Activities	-$105.5M	-$99.70M
YoY Change	5.82%	-13.23%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	23.90M	8.100M
YoY Change	195.06%	-87.89%
NET CHANGE
Cash From Operating Activities	90.60M	78.80M
Cash From Investing Activities	-105.5M	-99.70M
Cash From Financing Activities	23.90M	8.100M
Net Change In Cash	9.000M	-12.80M
YoY Change	-170.31%	-1700.0%
FREE CASH FLOW
Cash From Operating Activities	$90.60M	$78.80M
Capital Expenditures	-$101.3M	-$90.90M
Free Cash Flow	$191.9M	$169.7M
YoY Change	13.08%	18.84%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2017Q4	ava	Accumulated Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Tax AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossTax	4356000	USD
CY2018Q2	ava	Accumulated Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Tax AccumulatedOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossTax	2505000	USD
CY2017Q2	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	42800000	USD
	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	84973000	USD
CY2018Q2	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	45850000	USD
	ava	Depreciation And Amortization Expense DepreciationAndAmortizationExpense	90764000	USD
CY2018Q2	ava	Income Tax Reconciliation Amortizationof Excess Deferred Income Taxes Associatedwith Utility Plant Percent IncomeTaxReconciliationAmortizationofExcessDeferredIncomeTaxesAssociatedwithUtilityPlantPercent	0.064
	ava	Income Tax Reconciliation Amortizationof Excess Deferred Income Taxes Associatedwith Utility Plant Percent IncomeTaxReconciliationAmortizationofExcessDeferredIncomeTaxesAssociatedwithUtilityPlantPercent	0.031
	ava	Income Tax Reconciliation Settlementof Share Based Compensation Percent IncomeTaxReconciliationSettlementofShareBasedCompensationPercent	-0.010
	ava	Increase Decrease In Regulatory Assets And Liabilities Associatedwith Alternative Revenue Programs IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesAssociatedwithAlternativeRevenuePrograms	-10365000	USD
	ava	Increase Decrease In Regulatory Assets And Liabilities Associatedwith Alternative Revenue Programs IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesAssociatedwithAlternativeRevenuePrograms	-2226000	USD
CY2017Q2	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	23870000	USD
	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	47600000	USD
CY2018Q2	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	25472000	USD
	ava	Interest Expense Including Affiliated Trusts InterestExpenseIncludingAffiliatedTrusts	50501000	USD
CY2017Q4	ava	Long Term Debt Before Current Portion And Bonds Held By Company LongTermDebtBeforeCurrentPortionAndBondsHeldByCompany	1852937000	USD
CY2018Q2	ava	Long Term Debt Before Current Portion And Bonds Held By Company LongTermDebtBeforeCurrentPortionAndBondsHeldByCompany	1947882000	USD
	ava	Number Of Days Canadian Currency Prices Are Settled With Us Dollars NumberOfDaysCanadianCurrencyPricesAreSettledWithUSDollars	P60D
CY2017Q2	ava	Other Operating Expenses OtherOperatingExpenses	87202000	USD
	ava	Other Operating Expenses OtherOperatingExpenses	165824000	USD
CY2018Q2	ava	Other Operating Expenses OtherOperatingExpenses	88604000	USD
	ava	Other Operating Expenses OtherOperatingExpenses	173398000	USD
	ava	Paymentsfor Settlementof Derivative Instruments Operating Activities PaymentsforSettlementofDerivativeInstrumentsOperatingActivities	0	USD
	ava	Paymentsfor Settlementof Derivative Instruments Operating Activities PaymentsforSettlementofDerivativeInstrumentsOperatingActivities	31484000	USD
	ava	Paymentsforproceedsfromderivativeinstrumentoperatingactivities Paymentsforproceedsfromderivativeinstrumentoperatingactivities	25900000	USD
	ava	Percentageof Net Periodic Benefit Costs Capitalizedto Utility Property PercentageofNetPeriodicBenefitCostsCapitalizedtoUtilityProperty	0.40
	ava	Percentageof Net Periodic Benefit Costs Recordedto Operating Expenses PercentageofNetPeriodicBenefitCostsRecordedtoOperatingExpenses	0.60
	ava	Proceedsfrom Settlementof Derivative Instruments ProceedsfromSettlementofDerivativeInstruments	0	USD
	ava	Proceedsfrom Settlementof Derivative Instruments ProceedsfromSettlementofDerivativeInstruments	5594000	USD
CY2017Q2	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	13552000	USD
	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	35136000	USD
CY2018Q2	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	12986000	USD
	ava	Public Utility Operating Expenses Excise Taxes Collected PublicUtilityOperatingExpensesExciseTaxesCollected	32153000	USD
CY2017Q2	ava	Revenuefrom Alternative Revenue Programs RevenuefromAlternativeRevenuePrograms	4325000	USD
	ava	Revenuefrom Alternative Revenue Programs RevenuefromAlternativeRevenuePrograms	-10711000	USD
CY2018Q2	ava	Revenuefrom Alternative Revenue Programs RevenuefromAlternativeRevenuePrograms	3570000	USD
	ava	Revenuefrom Alternative Revenue Programs RevenuefromAlternativeRevenuePrograms	-2369000	USD
CY2017Q4	ava	Securedand Unsecured Debt SecuredandUnsecuredDebt	1801700000	USD
CY2018Q2	ava	Securedand Unsecured Debt SecuredandUnsecuredDebt	1904200000	USD
CY2017Q2	ava	Utility Revenues Excluding Alternative Revenue Programs UtilityRevenuesExcludingAlternativeRevenuePrograms	304404000	USD
	ava	Utility Revenues Excluding Alternative Revenue Programs UtilityRevenuesExcludingAlternativeRevenuePrograms	749977000	USD
CY2018Q2	ava	Utility Revenues Excluding Alternative Revenue Programs UtilityRevenuesExcludingAlternativeRevenuePrograms	309134000	USD
	ava	Utility Revenues Excluding Alternative Revenue Programs UtilityRevenuesExcludingAlternativeRevenuePrograms	717490000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000104918
CY2018Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	65688000	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	AVISTA CORP
	dei	Trading Symbol TradingSymbol	ava
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CY2018Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	76558000	USD
CY2017Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	33802000	USD
CY2018Q2	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	34951000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	33791000	USD
CY2018Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	31101000	USD
CY2017Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	20330000	USD
CY2018Q2	us-gaap	Accrued Vacation Current AccruedVacationCurrent	20538000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-8090000	USD
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CY2018Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9424000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5132000	USD
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CY2017Q4	us-gaap	Assets Assets	5514732000	USD
CY2018Q2	us-gaap	Assets Assets	5501780000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	337534000	USD
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CY2017Q2	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1274000	USD
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CY2018Q2	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	983000	USD
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CY2017Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	62148000	USD
CY2018Q2	us-gaap	Capital Lease Obligations CapitalLeaseObligations	58478000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8507000	USD
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	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	4903000	USD
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CY2017Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
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CY2017Q4	us-gaap	Derivative Fair Value Amount Offset Against Collateral Net DerivativeFairValueAmountOffsetAgainstCollateralNet	62408000	USD
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CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1133448000	USD
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CY2017Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	8848000	USD
CY2018Q2	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	7789000	USD
CY2017Q4	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	11739000	USD
CY2018Q2	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	6608000	USD
CY2018Q2	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	1
CY2017Q4	us-gaap	Goodwill Goodwill	57672000	USD
CY2018Q2	us-gaap	Goodwill Goodwill	57672000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	21771000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	83887000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	25577000	USD
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CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	34773000	USD
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CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13051000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46395000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5209000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15919000	USD
	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-45375000	USD
	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-65843000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-29435000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21642000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	5460000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-44080000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-12457000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	76000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	7879000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1174000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3825000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3908000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3787000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1560000	USD
	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	8831000	USD
	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-21323000	USD
CY2017Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	152000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	129000	shares
CY2018Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	306000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	299000	shares
CY2017Q2	us-gaap	Interest Expense InterestExpense	23670000	USD
	us-gaap	Interest Expense InterestExpense	47215000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	25170000	USD
	us-gaap	Interest Expense InterestExpense	49946000	USD
CY2017Q2	us-gaap	Interest Expense Trust Preferred Securities InterestExpenseTrustPreferredSecurities	200000	USD
	us-gaap	Interest Expense Trust Preferred Securities InterestExpenseTrustPreferredSecurities	385000	USD
CY2018Q2	us-gaap	Interest Expense Trust Preferred Securities InterestExpenseTrustPreferredSecurities	302000	USD
	us-gaap	Interest Expense Trust Preferred Securities InterestExpenseTrustPreferredSecurities	555000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	16351000	USD
CY2018Q2	us-gaap	Interest Payable Current InterestPayableCurrent	16659000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	58075000	USD
CY2018Q2	us-gaap	Inventory Net InventoryNet	56901000	USD
CY2017Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	41493000	USD
CY2018Q2	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	44335000	USD
CY2017Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	101317000	USD
CY2018Q2	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	116930000	USD
CY2018Q2	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	51500000	USD
CY1997Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	51500000	USD
CY2017Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust Noncurrent JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustNoncurrent	51547000	USD
CY2018Q2	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust Noncurrent JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustNoncurrent	51547000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	3784248000	USD
CY2018Q2	us-gaap	Liabilities Liabilities	3739073000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5514732000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5501780000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	697502000	USD
CY2018Q2	us-gaap	Liabilities Current LiabilitiesCurrent	289070000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1491799000	USD
CY2018Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1861584000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	277438000	USD
CY2018Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2598000	USD
CY2017Q4	us-gaap	Long Term Pollution Control Bond LongTermPollutionControlBond	-83700000	USD
CY2018Q2	us-gaap	Long Term Pollution Control Bond LongTermPollutionControlBond	-83700000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	656000	USD
CY2018Q2	us-gaap	Minority Interest MinorityInterest	249000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-34034000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-63359000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-189589000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-192905000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	228526000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	275425000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	21771000	USD
	us-gaap	Net Income Loss NetIncomeLoss	83887000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	25577000	USD
	us-gaap	Net Income Loss NetIncomeLoss	80467000	USD
CY2017Q4	us-gaap	Number Of Foreign Currency Derivatives Held NumberOfForeignCurrencyDerivativesHeld	18	derivative_contracts
CY2018Q2	us-gaap	Number Of Foreign Currency Derivatives Held NumberOfForeignCurrencyDerivativesHeld	23	derivative_contracts
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Reportable_Segments
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	57946000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	175373000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	53279000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	147485000	USD
	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	6366000	USD
	us-gaap	Other Amortization Of Deferred Charges OtherAmortizationOfDeferredCharges	6701000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	32873000	USD
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	22516000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	183000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	366000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	204000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	408000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-183000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-366000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-204000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-408000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-99000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-197000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-54000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-109000	USD
CY2017Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7086000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13265000	USD
CY2018Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	6543000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13367000	USD
CY2017Q4	us-gaap	Other Inventory OtherInventory	4843000	USD
CY2018Q2	us-gaap	Other Inventory OtherInventory	5958000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	159113000	USD
CY2018Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	121414000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	73115000	USD
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	69433000	USD
CY2017Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-193000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	867000	USD
CY2018Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1907000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2572000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	420000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	2108000	USD
CY2017Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	5772000	USD
	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	11705000	USD
CY2018Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	6594000	USD
	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	13538000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-972000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-438000	USD
CY2000	us-gaap	Payments For Repurchase Of Trust Preferred Securities PaymentsForRepurchaseOfTrustPreferredSecurities	10000000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	46193000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	49101000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	10347000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	7431000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	2500000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	2780000	USD
CY2017Q2	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	91085000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	177883000	USD
CY2018Q2	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	101653000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	183684000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	177714000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	183132000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	18539000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	16025000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	11544000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	10376000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	203566000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	195227000	USD
	us-gaap	Pension Contributions PensionContributions	14800000	USD
	us-gaap	Pension Contributions PensionContributions	14600000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1247000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1227000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	374621000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3445000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-8538000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	16000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-105398000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	21722000	USD
	us-gaap	Profit Loss ProfitLoss	83859000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	25644000	USD
	us-gaap	Profit Loss ProfitLoss	80600000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	6011147000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	6151461000	USD
CY2017Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	890000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1614000	USD
CY2018Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1139000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	2107000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	3292000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2845000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1612337000	USD
CY2018Q2	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1665763000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	157839000	USD
CY2018Q2	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	185650000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	4398810000	USD
CY2018Q2	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	4485698000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	5853308000	USD
CY2018Q2	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	5965811000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	44750000	USD
CY2018Q2	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	27404000	USD
CY2017Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	619399000	USD
CY2018Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	581495000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	48264000	USD
CY2018Q2	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	88500000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	800089000	USD
CY2018Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	799661000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1643000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	276170000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	604470000	USD
CY2018Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	637578000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	12600000	USD
CY2017Q2	us-gaap	Revenues Revenues	314501000	USD
	us-gaap	Revenues Revenues	750971000	USD
CY2018Q2	us-gaap	Revenues Revenues	319298000	USD
	us-gaap	Revenues Revenues	728659000	USD
CY2017Q4	us-gaap	Secured Debt SecuredDebt	1786700000	USD
CY2018Q2	us-gaap	Secured Debt SecuredDebt	1889200000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2643000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	3878000	USD
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	105398000	USD
CY2018Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2017Q2	us-gaap	Stockholders Equity StockholdersEquity	1687173000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1729828000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	1762458000	USD
CY2017Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1686894000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1730484000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1762707000	USD
CY2017Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	10285000	USD
CY2018Q2	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	13874000	USD
CY2017Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	68641000	USD
CY2018Q2	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	39383000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	42643000	USD
	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	84628000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	45651000	USD
	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	90384000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	78842000	USD
	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	151285000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	81078000	USD
	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	158376000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Products And Services UtilitiesOperatingExpenseProductsAndServices	102751000	USD
	us-gaap	Utilities Operating Expense Products And Services UtilitiesOperatingExpenseProductsAndServices	268337000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Products And Services UtilitiesOperatingExpenseProductsAndServices	105969000	USD
	us-gaap	Utilities Operating Expense Products And Services UtilitiesOperatingExpenseProductsAndServices	260587000	USD
CY2017Q2	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	23802000	USD
	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	56464000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	25596000	USD
	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	56425000	USD
CY2017Q2	us-gaap	Utility Revenue UtilityRevenue	308729000	USD
	us-gaap	Utility Revenue UtilityRevenue	739266000	USD
CY2018Q2	us-gaap	Utility Revenue UtilityRevenue	312704000	USD
	us-gaap	Utility Revenue UtilityRevenue	715121000	USD
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	64553000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	64511000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65983000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65957000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64401000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64382000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65677000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65658000	shares
	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Derivative Assets and Liabilities</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Derivatives are recorded as either assets or liabilities on the Condensed Consolidated Balance Sheets measured at estimated fair value.</font></div><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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 purchased gas cost adjustments, the ERM in Washington, the PCA mechanism in Idaho, and periodic general rate cases. The resulting regulatory assets have been concluded to be probable of recovery through future rates.</font></div><div style="line-height:120%;padding-top:12px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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.</font></div><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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 Condensed Consolidated Balance Sheets.</font></div><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Nature of Business</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Avista Corp. is primarily an electric and natural gas utility with certain other business ventures. Avista Utilities is an operating division of Avista Corp., comprising the regulated utility operations in the Pacific Northwest. Avista Utilities provides electric distribution and transmission, and natural gas distribution services in parts of eastern Washington and northern Idaho. Avista Utilities also provides natural gas distribution service in parts of northeastern and southwestern Oregon. Avista Utilities has electric generating facilities in Washington, Idaho, Oregon and Montana. Avista Utilities also supplies electricity to a small number of customers in Montana, most of whom are employees who operate Avista Utilities' Noxon Rapids generating facility.</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AERC is a wholly-owned subsidiary of Avista Corp. The primary subsidiary of AERC is AEL&P, which comprises Avista Corp.'s regulated utility operations in Alaska. </font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Avista Capital, a wholly owned non-regulated subsidiary of Avista Corp., is the parent company of all of the subsidiary companies in the non-utility businesses, with the exception of AJT Mining Properties, Inc., which is a subsidiary of AERC. See Note 14 for business segment information.</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On July 19, 2017, Avista Corp. entered into an Agreement and Plan of Merger (Merger Agreement) to become a wholly-owned subsidiary of Hydro One Limited (Hydro One). Consummation of the pending acquisition is subject to a number of approvals and the satisfaction or waiver of other specified conditions. The transaction is expected to close in the second half of 2018. See Note 15 for additional information.</font></div></div>

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$AVA
AVISTA CORP Stock $ava

2018 Q2 Form 10-Q Financial Statement

#000010491818000097 Filed on August 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

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Files In Submission

$AVA AVISTA CORP Stock $ava

2018 Q2 Form 10-Q Financial Statement

#000010491818000097 Filed on August 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AVA
AVISTA CORP Stock $ava