| Cover | May 01, 2020 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 1, 2020 |
| Entity File Number | 000-30421 |
| Entity Registrant Name | HANMI FINANCIAL CORPORATION |
| Entity Central Index Key | 0001109242 |
| Entity Tax Identification Number | 95-4788120 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 3660 Wilshire Boulevard, PH-A |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90010 |
| City Area Code | 213 |
| Local Phone Number | 382-2200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | HAFC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
