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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 340,398 | $ 271,489
Commitments to extend credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 327,381 | 246,161
Standby letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 9,140 | 8,926
Commercial letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 3,877 | 4,179
Unused credit card lines [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments |  | $ 12,223

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- Definition Undisbursed loan commitments. + References No definition available. + Details
Name: | hafc_UndisbursedLoanCommitments
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration