Quarterly report pursuant to Section 13 or 15(d)

Subordinated Debentures and Rescinded Stock Obligation - Additional Information (Detail)

v2.4.1.9
Subordinated Debentures and Rescinded Stock Obligation - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Nov. 30, 2014
Aug. 31, 2014
Sep. 30, 2014
Dec. 31, 2005
Debt Instrument [Line Items]            
Subordinated debentures $ 18,582,000us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust $ 18,544,000us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust        
Debt instrument discount       8,300,000us-gaap_DebtInstrumentUnamortizedDiscount    
Amortization of subordinated debentures 38,000us-gaap_AmortizationOfDebtDiscountPremium          
Rescinded stock obligation 150,000us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmount 933,000us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmount 15,500,000us-gaap_SharesSubjectToMandatoryRedemptionSettlementTermsAmount      
Accrued interest payable 65,000us-gaap_InterestPayableCurrent 288,000us-gaap_InterestPayableCurrent 4,500,000us-gaap_InterestPayableCurrent      
Central Bancorp, Inc [Member] | Subordinated Debentures [Member]            
Debt Instrument [Line Items]            
Subordinated debentures, unpaid principal amount         26,800,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
26,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
Subordinated debentures         18,500,000us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
 
Debt instrument discount         8,300,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
 
Fixed interest rate           6.26%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
Variable interest rate basis 3 month LIBOR plus 140 basis          
Maturity date of subordinated debentures Dec. 31, 2035          
Frequency of interest payment Quarterly          
Amortization of subordinated debentures $ 38,000us-gaap_AmortizationOfDebtDiscountPremium
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember