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Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock - Number of Shares, Shares Issued [Member] | Common Stock - Number of Shares, Treasury Shares [Member] | Common Stock - Number of Shares, Shares Outstanding [Member] | Stockholders' Equity, Additional Paid-in Capital [Member] | Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) [Member] | Stockholders' Equity, Accumulated Deficit [Member]
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Beginning balance at Dec. 31, 2013 | $ 400,077 us-gaap_StockholdersEquity | $ 257 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (69,858)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  | $ 552,270 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (9,380)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (73,212)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Beginning balance, shares at Dec. 31, 2013 |  | 32,339,444 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (577,894)us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 31,761,550 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Exercises of stock options | 190 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  |  | 190 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Exercises of stock options, shares | 15,195 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 15,195 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 15,195 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Exercises of stock warrants | 2 hafc_ExercisesOfStockWarrantsValue |  |  |  | 2 hafc_ExercisesOfStockWarrantsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Exercises of stock warrants, shares |  | 363 hafc_ExercisesOfStockWarrantsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 363 hafc_ExercisesOfStockWarrantsShares / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Restricted stock awards, net of shares forfeited | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Restricted stock awards, net of shares forfeited, shares |  | 18,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 18,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Share-based compensation expense | 605 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  | 605 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Cash dividends declared | (2,225)us-gaap_DividendsCommonStockCash |  |  |  |  |  | (2,225)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Comprehensive income: |  |  |  |  |  |  |
Net income | 10,991 us-gaap_NetIncomeLoss |  |  |  |  |  | 10,991 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Change in unrealized gain (loss) on securities available for sale and interest-only strips, net of income taxes | 3,871 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  | 3,871 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Ending balance at Mar. 31, 2014 | 413,511 us-gaap_StockholdersEquity | 257 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (69,858)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  | 553,067 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (5,509)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (64,446)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending balance, shares at Mar. 31, 2014 |  | 32,373,002 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (577,894)us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 31,795,108 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Beginning balance at Dec. 31, 2014 | 453,387 us-gaap_StockholdersEquity | 257 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (69,858)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  | 554,904 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 463 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (32,379)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Beginning balance, shares at Dec. 31, 2014 |  | 32,488,097 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (577,894)us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 31,910,203 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Exercises of stock options | 278 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  |  | 278 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Exercises of stock options, shares | 19,581 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 19,581 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 19,581 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Restricted stock awards, net of shares forfeited | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Restricted stock awards, net of shares forfeited, shares |  | 3,850 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 3,850 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |
Share-based compensation expense | 528 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  | 528 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Cash dividends declared | (3,513)us-gaap_DividendsCommonStockCash |  |  |  |  |  | (3,513)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Comprehensive income: |  |  |  |  |  |  |
Net income | 11,054 us-gaap_NetIncomeLoss |  |  |  |  |  | 11,054 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Change in unrealized gain (loss) on securities available for sale and interest-only strips, net of income taxes | 5,736 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  | 5,736 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Ending balance at Mar. 31, 2015 | $ 467,470 us-gaap_StockholdersEquity | $ 257 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (69,858)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  | $ 555,710 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 6,199 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (24,838)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending balance, shares at Mar. 31, 2015 |  | 32,511,528 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (577,894)us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 31,933,634 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = hafc_CommonStockOutstandingMember |  |  |

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