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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 203,604 | $ 212,885
Commitments to extend credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 177,955 | 182,746
Standby letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 9,694 | 10,588
Commercial letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 4,150 | 6,092
Unused credit card lines [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 11,805 | $ 13,459

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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