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Loans - Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | $ 2,785,261 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 2,234,089 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount |
Allowance for loans losses | (52,666)us-gaap_LoansAndLeasesReceivableAllowance | (57,555)us-gaap_LoansAndLeasesReceivableAllowance |
Deferred loan costs | 3,237 us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums | 964 us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums |
Loans receivable, net | 2,735,832 us-gaap_LoansAndLeasesReceivableNetReportedAmount | 2,177,498 us-gaap_LoansAndLeasesReceivableNetReportedAmount |
Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 2,508,515 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember | 1,969,798 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember |
Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 249,189 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember | 231,786 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember |
Consumer loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 27,557 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 32,505 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Non-PCI Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 2,740,760 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 2,234,089 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Allowance for loans losses | (51,640)us-gaap_LoansAndLeasesReceivableAllowance / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (57,555)us-gaap_LoansAndLeasesReceivableAllowance / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (63,305)us-gaap_LoansAndLeasesReceivableAllowance / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember
Deferred loan costs | 3,237 us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |  |
Loans receivable, net | 2,692,357 us-gaap_LoansAndLeasesReceivableNetReportedAmount / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |  |
Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 2,464,386 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |  |
Allowance for loans losses | (41,194)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (43,550)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (49,472)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember
Non-PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 248,862 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |  |
Allowance for loans losses | (9,142)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (11,287)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (10,636)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember
Non-PCI Loans [Member] | Consumer loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 27,512 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 32,505 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Allowance for loans losses | (220)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (1,427)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | (2,280)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember
PCI Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 44,501 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (1,026)us-gaap_LoansAndLeasesReceivableAllowance / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 43,475 us-gaap_LoansAndLeasesReceivableNetReportedAmount / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 44,129 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 327 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
PCI Loans [Member] | Consumer loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 45 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 45 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Retail [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 683,607 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember | 543,619 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember |
Retail [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 675,072 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 543,619 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Retail [Member] | PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 8,535 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (401)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 8,134 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateRetailMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Hotel/motel [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 462,181 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember | 322,927 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember |
Hotel/motel [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 454,499 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 322,927 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Hotel/motel [Member] | PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 7,682 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (99)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 7,583 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_HotelAndMotelMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Gas station [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 369,985 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember | 292,557 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember |
Gas station [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 362,240 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 292,557 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Gas station [Member] | PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 7,745 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (302)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 7,443 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_GasolineStationMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Other [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 847,922 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember | 731,617 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember |
Other [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 842,126 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 731,617 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Other [Member] | PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 5,796 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (65)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 5,731 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateOtherMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Construction [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 9,517 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateConstructionMember |  |
Construction [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 9,517 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialRealEstateConstructionMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |  |
Residential property [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 135,303 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember | 79,078 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember |
Residential property [Member] | Non-PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 120,932 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 79,078 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Residential property [Member] | PCI Loans [Member] | Real estate loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 14,371 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (28)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 14,343 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_RealEstateLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_ResidentialPropertyRealEstateLoanMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Commercial term [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 116,400 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember | 124,391 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember |
Commercial term [Member] | Non-PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 116,073 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 124,391 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
Commercial term [Member] | PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 327 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Allowance for loans losses | (131)us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Loans receivable, net | 196 us-gaap_LoansAndLeasesReceivableNetReportedAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialTermLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_PurchaseCreditImpairedLoansMember |  |
Commercial lines of credit [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 93,860 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialLinesOfCreditMember | 71,042 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialLinesOfCreditMember |
Commercial lines of credit [Member] | Non-PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 93,860 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialLinesOfCreditMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | 71,042 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_CommercialLinesOfCreditMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |
International loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | 38,929 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_InternationalLoansMember | 36,353 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_InternationalLoansMember |
International loans [Member] | Non-PCI Loans [Member] | Commercial and industrial loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total gross loans | $ 38,929 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_InternationalLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember | $ 36,353 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = hafc_CommercialAndIndustrialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = hafc_InternationalLoansMember / hafc_ImpairedFinancialReceivableTypeAxis = hafc_NonPurchasedCreditImpairedLoansMember |

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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