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Off-Balance Sheet Commitments - Additional Information (Detail) $ in Millions | Dec. 31, 2024 USD ($)
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Risks and Uncertainties [Abstract] |
Letters of credit to FHLBSF | $ 120.0
Deposits from State of California | $ 120.0

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- Definition Federal home loan bank advances general debt obligations disclosure deposits available. + References No definition available. + Details
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Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Federal home loan bank advances general debt obligations disclosure letter of credit available. + References No definition available. + Details
Name: | hafc_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosureLetterOfCreditAvailable
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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