XML 85 R60.htm IDEA: XBRL DOCUMENT
v3.19.2

Derivatives And Risk Management (Energy Commodity Derivatives) (Details) frequency in Thousands, Volt in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 Volt frequency | Dec. 31, 2018 Volt frequency
Sales [Member] | Physical [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | 82 | 197
2020 | 123 | 123
2021 | 0 | 0
2022 | 0 | 0
2023 | 0 | 0
Thereafter | 0 | 0
Sales [Member] | Physical [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | Volt | 481 | 2,909
2020 | Volt | 1,430 | 1,430
2021 | Volt | 1,049 | 1,049
2022 | 0 | 0
2023 | 0 | 0
Thereafter | Volt | 0 | 0
Sales [Member] | Financial [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | 1,330 | 2,790
2020 | 1,055 | 959
2021 | 246 | 0
2022 | 0 | 0
2023 | 0 | 0
Thereafter | 0 | 0
Sales [Member] | Financial [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | Volt | 26,150 | 54,418
2020 | Volt | 23,683 | 14,625
2021 | Volt | 8,575 | 4,100
2022 | Volt | 0 | 0
2023 | 0 | 0
Thereafter | Volt | 0 | 0
Purchase [Member] | Physical [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | 1 | 206
2020 | 0 | 0
2021 | 0 | 0
2022 | 0 | 0
2023 | 0 | 0
Thereafter | 0 | 0
Purchase [Member] | Physical [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | Volt | 5,378 | 10,732
2020 | Volt | 1,138 | 1,138
2021 | Volt | 0 | 0
2022 | Volt | 0 | 0
2023 | Volt | 0 | 0
Thereafter | Volt | 0 | 0
Purchase [Member] | Financial [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | 559 | 941
2020 | 0 | 0
2021 | 0 | 0
2022 | 0 | 0
2023 | 0 | 0
Thereafter | 0 | 0
Purchase [Member] | Financial [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
2019 | Volt | 61,385 | 101,293
2020 | Volt | 60,253 | 47,225
2021 | Volt | 17,640 | 9,670
2022 | Volt | 1,350 | 0
2023 | Volt | 0 | 0
Thereafter | Volt | 0 | 0

X
- Definition Energy Commodity Derivative Expected To Be Settle Thereafter + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleThereafter
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Commodity Derivative Expected To Be Settle Year Five + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleYearFive
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Commodity Derivative Expected To Be Settle Year Four + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleYearFour
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Commodity Derivative Expected To Be Settle Year One + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleYearOne
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Commodity Derivative Expected To Be Settle Year Three + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleYearThree
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Energy Commodity Derivative Expected To Be Settle Year Two + References No definition available. + Details
Name: | ava_EnergyCommodityDerivativeExpectedToBeSettleYearTwo
Namespace Prefix: | ava_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ava_PhysicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=ava_ElectricDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnergyAxis=ava_GasDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ava_FinancialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=ava_PurchaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |