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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 308,801 hafc_UndisbursedLoanCommitments | $ 325,612 hafc_UndisbursedLoanCommitments
Commitments to extend credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 297,912 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_CommitmentsToExtendCreditMember | 309,584 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_CommitmentsToExtendCreditMember
Standby letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 6,299 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_StandbyLettersOfCreditMember | 8,982 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_StandbyLettersOfCreditMember
Commercial letters of credit [Member] |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 4,590 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = hafc_CommercialLettersOfCreditMember | $ 7,046 hafc_UndisbursedLoanCommitments / us-gaap_LossContingenciesByNatureOfContingencyAxis = hafc_CommercialLettersOfCreditMember

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- Definition Undisbursed loan commitments. + References No definition available. + Details
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