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Loans - Troubled Debt Restructurings, Disaggregated by Loan Class (Parenthetical) (Detail) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Real estate loans [Member] | Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loan modification made through deferrals principal payment |  | $ 943,000 hafc_LoanModificationMadeThroughDeferralOfPrincipalPayment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_OtherCommercialPropertyMember
Commercial and industrial loans [Member] | Commercial term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loan modification made through deferrals principal payment |  | 491,000 hafc_LoanModificationMadeThroughDeferralOfPrincipalPayment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember
Amount of loan modification through extension of maturity | 508,000 hafc_AmountOfLoanModificationThroughExtensionOfMaturity / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember | 190,000 hafc_AmountOfLoanModificationThroughExtensionOfMaturity / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember
Loan modifications made through reduction of principal or accrued interest payments |  | 107,000 hafc_LoanModificationMadeThroughReductionOfPrincipalOrAccruedInterestPayment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember
Commercial and industrial loans [Member] | Commercial lines of credit [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loan modification made through deferrals principal payment |  | $ 242,000 hafc_LoanModificationMadeThroughDeferralOfPrincipalPayment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialLinesOfCreditMember

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- Definition Amount of loan modification through extension of maturity. + References No definition available. + Details
Name: | hafc_AmountOfLoanModificationThroughExtensionOfMaturity
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Loan modification made through deferral of principal payment. + References No definition available. + Details
Name: | hafc_LoanModificationMadeThroughDeferralOfPrincipalPayment
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Loan modification made through reduction of principal or accrued interest payment. + References No definition available. + Details
Name: | hafc_LoanModificationMadeThroughReductionOfPrincipalOrAccruedInterestPayment
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=hafc_CommercialAndIndustrialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=hafc_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |