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Loans - Troubled Debt Restructuring, Disaggregated by Loan Class (Parenthetical) (Detail) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Retail [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Amount of loan modification through extension of maturity |  | $ 102,000
Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Amount of loan modification through extension of maturity |  | 504,000
Unsecured [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Amount of loan modification through extension of maturity | 198,000 | 1,900,000
Loan modifications made through reduction of principal or accrued interest payments |  | 1,600,000
Secured By Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Amount of loan modification through extension of maturity |  | 501,000
Loan modifications made through reduction of principal or accrued interest payments |  | 1,300,000
SBA Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loan modifications made through reduction of principal or accrued interest payments |  | 322,000
Loan modifications made through deferral principal payments | 7,000 | 133,000
International Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loan modifications made through reduction of principal or accrued interest payments | $ 1,400,000 |

X
- Definition Amount of loan modification through extension of maturity. + References No definition available. + Details
Name: | hafc_AmountOfLoanModificationThroughExtensionOfMaturity
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan modification made through deferral of principal payment. + References No definition available. + Details
Name: | hafc_LoanModificationMadeThroughDeferralOfPrincipalPayment
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loan modification made through reduction of principal or accrued interest payment. + References No definition available. + Details
Name: | hafc_LoanModificationMadeThroughReductionOfPrincipalOrAccruedInterestPayment
Namespace Prefix: | hafc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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