XML 85 R131.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Sale of METALfx Sale of METALfx (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Apr. 18, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 89.20%
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal Group Including Discontinued Operation Gross Consideration |  | $ 17.5
Disposal Group Including Discontinued Operation Consideration Held in Escrow |  | $ 1.2
Disposal Group Including Discontinued Operation Percentage of Gross Consideration Held in Escrow |  | 7.00%
Disposal Group, Including Discontinued Operation, Consideration |  | $ 16.5
Disposal Group Not Discontinued Operation Gain (Loss) On Disposal Net of Tax | $ 3.3 |

X
- Definition Disposal Group Including Discontinued Operation Consideration Held in Escrow + References No definition available. + Details
Name: | ava_DisposalGroupIncludingDiscontinuedOperationConsiderationHeldinEscrow
Namespace Prefix: | ava_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disposal Group Including Discontinued Operation Gross Consideration + References No definition available. + Details
Name: | ava_DisposalGroupIncludingDiscontinuedOperationGrossConsideration
Namespace Prefix: | ava_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disposal Group Including Discontinued Operation Percentage of Gross Consideration Held in Escrow + References No definition available. + Details
Name: | ava_DisposalGroupIncludingDiscontinuedOperationPercentageofGrossConsiderationHeldinEscrow
Namespace Prefix: | ava_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disposal Group Not Discontinued Operation Gain (Loss) On Disposal Net of Tax + References No definition available. + Details
Name: | ava_DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetofTax
Namespace Prefix: | ava_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |