Loans - Loans Receivable to Loans Held for Sale (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward]
Loans held for sale, at beginning of period	$ 2,874	$ 5,451
Originations	12,152	23,108
Sales	(12,423)	(19,854)
Principal payoffs and amortization	(20)	(28)
Loans held for sale, at end of period	2,583	8,677
Real estate loans [Member]
Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward]
Loans held for sale, at beginning of period	840	3,323
Originations	6,473	16,927
Sales	(5,488)	(13,014)
Principal payoffs and amortization	(1)	(10)
Loans held for sale, at end of period	1,824	7,226
Commercial and industrial loans [Member]
Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward]
Loans held for sale, at beginning of period	2,034	2,128
Originations	5,679	6,181
Sales	(6,935)	(6,840)
Principal payoffs and amortization	(19)	(18)
Loans held for sale, at end of period	$ 759	$ 1,451

Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward]

No definition available.

Name:	hafc_FinancingReceivableReclassificationFromPortfolioLoansToLoansHeldForSaleRollForward
Namespace Prefix:	hafc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Principal payoffs and amortization.

+ References

No definition available.

+ Details

Name:	hafc_PrincipalPayoffsAndAmortization
Namespace Prefix:	hafc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after allowance for bad debt, of loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of cash paid for the origination of mortgages that are held for sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3337-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3461-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 230
-Section 55
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=34726456&loc=d3e60097-112785

+ Details

Name:	us-gaap_ProceedsFromSaleOfLoansHeldForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=hafc_CommercialAndIndustrialLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: