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Label	Element	Value
Retained Earnings [Member]
Cumulative Effects of New Accounting Principle in Period of Adoption	hfwa_CumulativeEffectsOfNewAccountingPrincipleInPeriodOfAdoption	$ (5,615,000)
Cumulative Effects of New Accounting Principle in Period of Adoption	hfwa_CumulativeEffectsOfNewAccountingPrincipleInPeriodOfAdoption	$ (399,000)

X

- Definition

Cumulative Effects of New Accounting Principle in Period of Adoption

+ References

No definition available.

+ Details

Name:	hfwa_CumulativeEffectsOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix:	hfwa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: