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v3.20.4

Employee Benefit Plans Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Retirement Benefits [Abstract] |
Changes in deferred compensation plan | The following table presents a summary of the changes in the Deferred Compensation Plan during the periods indicated:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (In thousands)
Balance outstanding at the beginning of the year | $ | 4,244 |  |  | $ | 3,654 |  |  | $ | 2,844 |
Employer contributions | 207 |  |  | 443 |  |  | 713 |
Interest credited | 128 |  |  | 147 |  |  | 97 |
Benefits Paid | (478) |  |  | — |  |  | — |
Balance outstanding at the end of the year | $ | 4,101 |  |  | $ | 4,244 |  |  | $ | 3,654 |
Salary continuation plan | The following table presents a summary of the changes in the salary continuation plan during the periods indicated:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (In thousands)
Obligation, at the beginning of the year | $ | 4,334 |  |  | $ | 4,600 |  |  | $ | — |
Balance acquired in Premier Merger | — |  |  | — |  |  | 4,718 |
Benefits paid | (460) |  |  | (554) |  |  | (529) |
Expenses incurred | 288 |  |  | 288 |  |  | 411 |
Obligation, at the end of the year | $ | 4,162 |  |  | $ | 4,334 |  |  | $ | 4,600 |

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- Definition [Table Text Block] for Deferred Compensation Agreement with Individual, Contributions by Employer [Table] + References No definition available. + Details
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Namespace Prefix: | hfwa_
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Balance Type: | na
Period Type: | duration

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- Definition Salary Continuation Plan [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | hfwa_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration