XML 37 R28.htm IDEA: XBRL DOCUMENT
v3.22.1

Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements (Details) | Mar. 31, 2022 branch
--- | ---
Heritage Bank [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Number of Branches Operating | 49

X
- Definition Number of branches operating. + References No definition available. + Details
Name: | hfwa_NumberOfBranchesOperating
Namespace Prefix: | hfwa_
Data Type: | xbrli:integerItemType
Balance Type: | na
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_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=hfwa_HeritageBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |