Annual report pursuant to Section 13 and 15(d)

Loans - Additional Information (Detail)

v2.4.1.9
Loans - Additional Information (Detail) (USD $)
 12 Months Ended 3 Months Ended
Dec. 31, 2014
Property
Dec. 31, 2013
Property
Dec. 31, 2012
Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accrued interest receivable $ 9,749,000us-gaap_InterestReceivable $ 7,055,000us-gaap_InterestReceivable    
Loans receivable 2,735,832,000us-gaap_LoansAndLeasesReceivableNetReportedAmount 2,177,498,000us-gaap_LoansAndLeasesReceivableNetReportedAmount    
Loans receivable reclassified as loans held for sale 0us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 8,010,000us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 95,611,000us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1  
Sale of loans held for sale 42,412,000us-gaap_ProceedsFromSaleOfLoansHeldForSale 96,754,000us-gaap_ProceedsFromSaleOfLoansHeldForSale    
Allowance for off-balance sheet items 1,400,000hafc_AllowanceForOffBalanceSheetItems 1,200,000hafc_AllowanceForOffBalanceSheetItems    
Number of real estate properties 27us-gaap_NumberOfRealEstateProperties 3us-gaap_NumberOfRealEstateProperties    
Net carrying value of other real estate property 15,790,000us-gaap_OtherRealEstateAndForeclosedAssets 756,000us-gaap_OtherRealEstateAndForeclosedAssets    
Net valuation adjustment   56,000us-gaap_OtherRealEstateValuationAdjustments    
TDR loans receivable 26,300,000hafc_LoansHeldForSaleExcludedFromTdrLoansReceivable 30,000,000hafc_LoansHeldForSaleExcludedFromTdrLoansReceivable 35,700,000hafc_LoansHeldForSaleExcludedFromTdrLoansReceivable  
Principal and interest due 6 months      
Reserves relating to loans included in allowance for loan losses 2,900,000hafc_ReserveRelatedToTdrLoansIncludedInAllowanceForLoanLosses 2,800,000hafc_ReserveRelatedToTdrLoansIncludedInAllowanceForLoanLosses 3,600,000hafc_ReserveRelatedToTdrLoansIncludedInAllowanceForLoanLosses  
Net carrying value 9,830,000us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 8,576,000us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 15,046,000us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2  
Number of loans restructured 17hafc_NumberOfDefaultLoansRestructured      
Loans on non-accrual status 25,282,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus 25,877,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus    
Serviced loans sold to unaffiliated parties 500,900,000hafc_ServicedLoansSoldToUnaffiliatedParties 350,000,000hafc_ServicedLoansSoldToUnaffiliatedParties    
Insurance reimbursement settlement       611,000,000us-gaap_InsuranceSettlementsReceivable
Recoveries of previously charged-off and reimbursed Commercial SLA loans which needs to be reimbursed 95.00%hafc_FdicPercentageOfLossRecoveries      
FDIC loss sharing asset 2,100,000us-gaap_FDICIndemnificationAsset      
Single-family loans covered 102,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered      
FDIC loss sharing liability 2,074,000hafc_FdicIndemnificationLiability      
FDIC recoveries partially offset 3,300,000us-gaap_InsuranceRecoveries      
Reimbursable expense owed to bank 1,200,000us-gaap_CostOfReimbursableExpense      
PCI Loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivable 43,475,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ hafc_ImpairedFinancialReceivableTypeAxis
= hafc_PurchaseCreditImpairedLoansMember 		     
Loans on non-accrual status 0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ hafc_ImpairedFinancialReceivableTypeAxis
= hafc_PurchaseCreditImpairedLoansMember 		     
Minimum [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Due period for considering loans as impaired 90 days      
Recoveries of previously charged-off and reimbursed Commercial SLA loans which needs to be reimbursed       80.00%hafc_FdicPercentageOfLossRecoveries
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Recoveries of previously charged-off and reimbursed Commercial SLA loans which needs to be reimbursed       95.00%hafc_FdicPercentageOfLossRecoveries
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Central Bancorp, Inc [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Net carrying value of other real estate property 15,300,000us-gaap_OtherRealEstateAndForeclosedAssets
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember 		     
Securities Pledged as Collateral [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivable 840,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_SecuritiesPledgedAsCollateralMember 		568,700,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_SecuritiesPledgedAsCollateralMember 		   
Loans and Finance Receivables [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Accrued interest receivable $ 6,400,000us-gaap_InterestReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansAndFinanceReceivablesMember 		$ 5,400,000us-gaap_InterestReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_LoansAndFinanceReceivablesMember