Annual report pursuant to Section 13 and 15(d)

Accounting for Investments in Qualified Affordable Housing Projects - Additional Information (Detail)

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Accounting for Investments in Qualified Affordable Housing Projects - Additional Information (Detail) (USD $)
0 Months Ended 12 Months Ended
Jan. 01, 2012
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Adjusted Earnings Before Interest Taxes Depreciation And Amortization And Other Non Cash Items [Abstract]        
Cumulative effect of retrospective application of accounting principle $ 1,100,000us-gaap_CumulativeEffectOfProspectiveApplicationOfNewAccountingPrinciple      
Decrease in net income   49,000hafc_DecreaseInNetIncome 50,000hafc_DecreaseInNetIncome  
Impairment of investments   0us-gaap_ImpairmentOfInvestments 0us-gaap_ImpairmentOfInvestments 292,000us-gaap_ImpairmentOfInvestments
Investment in low income housing   21,300,000hafc_InvestmentsInQualifiedAffordableHousingProjects 3,000,000hafc_InvestmentsInQualifiedAffordableHousingProjects  
Unfunded commitments on low income housing   11,900,000us-gaap_OtherCommitment 0us-gaap_OtherCommitment  
Income tax expense   1,600,000us-gaap_OtherTaxExpenseBenefit 804,000us-gaap_OtherTaxExpenseBenefit  
Tax credit and other benefit received from tax expenses   $ 1,600,000us-gaap_IncomeTaxReconciliationTaxCredits $ 775,000us-gaap_IncomeTaxReconciliationTaxCredits