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Loans - Summary of Interest Foregone on Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Receivables [Abstract] |  |  |
Interest income that would have been recognized had impaired loans performed in accordance with their original terms | $ 4,468 hafc_LoansAndLeasesReceivableImpairedInterestIncomeNotRecognized | $ 4,451 hafc_LoansAndLeasesReceivableImpairedInterestIncomeNotRecognized | $ 5,887 hafc_LoansAndLeasesReceivableImpairedInterestIncomeNotRecognized
Less: Interest income recognized on impaired loans | (3,160)us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | (3,708)us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | (4,541)us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Interest foregone on impaired loans | $ 1,308 hafc_LoansAndLeasesReceivableImpairedInterestIncomeForgone | $ 743 hafc_LoansAndLeasesReceivableImpairedInterestIncomeForgone | $ 1,346 hafc_LoansAndLeasesReceivableImpairedInterestIncomeForgone

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- Definition Loans and leases receivable impaired interest income forgone. + References No definition available. + Details
Name: | hafc_LoansAndLeasesReceivableImpairedInterestIncomeForgone
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Loans and leases receivable impaired interest income not recognized. + References No definition available. + Details
Name: | hafc_LoansAndLeasesReceivableImpairedInterestIncomeNotRecognized
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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