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Loans - Non-Performing Assets (Parenthetical) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Receivables [Abstract] |  |
Nonperforming loan held-for-sale | $ 27.2 |
Repossessed personal property | $ 1.2 | $ 1.3

X
- Definition Nonperforming loan held-for-sale. + References No definition available. + Details
Name: | hafc_NonperformingLoanHeldForSale
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Repossessed personal property. + References No definition available. + Details
Name: | hafc_RepossessedPersonalProperty
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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