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Share-Based Compensation - Summary of Stock Options Outstanding under Plans (Parenthetical) (Detail) (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |
Intrinsic value represents the excess of the closing stock price related to options outstanding | $ 21.15 hafc_ClosingPriceOfCommonStock | $ 21.81 hafc_ClosingPriceOfCommonStock

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- Definition The excess of the closing stock price on the last day of the trading period over the exercise price. + References No definition available. + Details
Name: | hafc_ClosingPriceOfCommonStock
Namespace Prefix: | hafc_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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