Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Central Bancorp, Inc [Member]
   
Loans At Acquisition Date [Line Items]    
Pro forma revenues (net interest income plus noninterest income) $ 225,120us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 206,258us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Pro forma net income from continuing operations $ 56,448us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 40,170us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Pro forma earnings per share from continuing operations:    
Basic $ 1.78us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 1.27us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
Diluted $ 1.77us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember
$ 1.27us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= hafc_CentralBancorpIncMember