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Loans Receivable - SBA Loans (Details) - SBA Loans - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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SBA Loans [Line Items] |  |
Loans serviced for others with participating interest, gross loan balance | $ 17,375 | $ 30,852
SBA loans serviced for others with participating interest, participation balance owned by Bank | $ 3,791 | $ 7,088

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- Definition The aggregate amount of the participating loan obligation at the end of the accounting period. + References No definition available. + Details
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Namespace Prefix: | hfwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition [Line Items] for SBA Loans [Table] + References No definition available. + Details
Name: | hfwa_SBALoansLineItems
Namespace Prefix: | hfwa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction, at the date of derecognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 + Details
Name: | us-gaap_TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=hfwa_SBALoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |