Quarterly report pursuant to Section 13 or 15(d)

Acquisition - Business Acquisition, Unaudited Proforma Result of Operation Information (Detail)

v2.4.1.9
Acquisition - Business Acquisition, Unaudited Proforma Result of Operation Information (Detail) (Central Bancorp, Inc [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Central Bancorp, Inc [Member]
   
Loans At Acquisition Date [Line Items]    
Pro forma revenues (net interest income plus noninterest income) $ 53,531us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 56,245us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Pro forma net income from continuing operations $ 12,611us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 16,280us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Pro forma earnings per share from continuing operations:    
Basic $ 0.40us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 0.51us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Diluted $ 0.39us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 0.51us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember