Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Unrecognized tax benefits that would affect our effective tax rate if recognized $ 1,500,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate $ 1,000,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate $ 1,000,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Unrecognized tax benefits decreased relating to acquisitions     27,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromAcquisition
Increase in unrecognized tax benefits related to California Enterprise Zone interest deduction 676,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions    14,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Decrease in unrecognized tax benefits related to non-qualified stock option 165,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions      
Addition in Unrecognized tax benefits except increase in accrued interest 0us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease 0us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease  
Accrued interest on uncertain tax benefits 52,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 45,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 41,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Accrued interest related to uncertain tax positions, net of federal tax benefit 366,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 403,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 360,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Income tax years under examination December 31, 2004 through 2013    
Net valuation allowance release     62,600,000hafc_ReleaseOfValuationAllowance
Increase in deferred tax assets, allowance for loan losses and net operating loss carryforwards     18,300,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation allowance 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance
Operating loss carryforwards, maturity date 2033    
Minimum [Member]      
Income Taxes [Line Items]      
Year open to examination 2004    
Maximum [Member]      
Income Taxes [Line Items]      
Year open to examination 2013    
Federal [Member]      
Income Taxes [Line Items]      
Year open to examination 2009    
Net operating loss carryforwards 20,900,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember 		   
State income tax [Member]      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 245,800,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember 		   
State income tax [Member] | Minimum [Member]      
Income Taxes [Line Items]      
Year open to examination 2008    
State income tax [Member] | Maximum [Member]      
Income Taxes [Line Items]      
Year open to examination 2009