XML 104 R90.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Employee Benefit Plans - Narrative (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) hour | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Percentage of employer contribution fully vested | 100.00% |  |
401(k) Plan and Trust Salary Saving Plan |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Employer matching contribution, percent of employee's gross pay | 50.00% |  |
Maximum annual contributions per employee, percent | 3.00% |  |
Defined contribution plan, employer matching contribution amount | $ 1,700,000 | $ 1,700,000 | $ 1,600,000
401(k) Plan and Trust |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Minimum hours of service required for eligibility under the plan | hour | 1,000 |  |
Minimum age required for eligibility under the plan | 18 years |  |
Employer profit sharing contributions | $ 0 | $ 0 | $ 0

X
- Definition Defined Contribution Plan, Employer Contribution for Profit Sharing and Discretionary + References No definition available. + Details
Name: | hfwa_DefinedContributionPlanEmployerContributionforProfitSharingandDiscretionary
Namespace Prefix: | hfwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition defined contribution plan, employer matching contribution amount + References No definition available. + Details
Name: | hfwa_Definedcontributionplanemployermatchingcontributionamount
Namespace Prefix: | hfwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum Age Required for Eligibility Under Plan + References No definition available. + Details
Name: | hfwa_MinimumAgeRequiredforEligibilityUnderPlan
Namespace Prefix: | hfwa_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum Hours of Service Required for Eligibility Under Plan + References No definition available. + Details
Name: | hfwa_MinimumHoursofServiceRequiredforEligibilityUnderPlan
Namespace Prefix: | hfwa_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of Employer Contribution Fully Vested + References No definition available. + Details
Name: | hfwa_PercentageofEmployerContributionFullyVested
Namespace Prefix: | hfwa_
Data Type: | dtr-types:percentItemType
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_DeferredCompensationArrangementWithIndividualPostretirementBenefitsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=hfwa_HeritageFinancialCorporation401kPlanandTrustSalarySavingPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=hfwa_HeritageFinancialCorporation401kPlanandTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |