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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total Undisbursed Loan Commitments | $ 187,701 | $ 212,885
Commitments to Extend Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total Undisbursed Loan Commitments | 158,744 | 182,746
Standby Letters of Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total Undisbursed Loan Commitments | 10,493 | 10,588
Commercial Letters of Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total Undisbursed Loan Commitments | 4,817 | 6,092
Unused Credit Card Lines [Member] |  |
Loss Contingencies [Line Items] |  |
Total Undisbursed Loan Commitments | $ 13,647 | $ 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