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Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail) $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets | 0.080 |
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 0.060 |
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets | 0.040 |
Minimum to Be Categorized as Well Capitalized Ratio, Total capital to risk-weighted assets | 0.100 |
Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to risk-weighted assets | 0.080 |
Hanmi Financial |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual Capital, Total capital to risk-weighted assets | $ 1,008,479 | $ 979,843
Actual Capital, Tier 1 capital to risk-weighted assets | 826,096 | 801,040
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 804,474 | 778,941
Actual Capital, Tier 1 capital to average assets | $ 826,096 | $ 801,040
Actual Capital Ratio, Total capital to risk-weighted assets | 0.1505 | 0.1524
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 0.1233 | 0.1246
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 0.12 | 0.1211
Actual Capital Ratio, Tier 1 capital to average assets | 0.1064 | 0.1063
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 536,132 | $ 514,455
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 402,099 | 385,841
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 301,575 | 289,381
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 310,535 | $ 301,346
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets | 0.08 | 0.08
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 0.06 | 0.06
Minimum Regulatory Requirement Ratio for Common equity Tier 1 capital to risk-weighted assets | 4.50% | 4.50%
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets | 0.04 | 0.04
Hanmi Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual Capital, Total capital to risk-weighted assets | $ 957,077 | $ 927,882
Actual Capital, Tier 1 capital to risk-weighted assets | 884,694 | 859,079
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 884,694 | 859,079
Actual Capital, Tier 1 capital to average assets | $ 884,694 | $ 859,079
Actual Capital Ratio, Total capital to risk-weighted assets | 0.1428 | 0.1443
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 0.132 | 0.1336
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 0.132 | 0.1336
Actual Capital Ratio, Tier 1 capital to average assets | 0.1146 | 0.1147
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 536,183 | $ 514,406
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 402,137 | 385,804
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 301,603 | 289,353
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 308,726 | $ 299,771
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets | 0.08 | 0.08
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 0.06 | 0.06
Minimum Regulatory Requirement Ratio for Common equity Tier 1 capital to risk-weighted assets | 4.50% | 4.50%
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets | 0.04 | 0.04
Minimum to Be Categorized as Well Capitalized Capital, Total capital to risk-weighted assets | $ 670,229 | $ 643,007
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets | 536,183 | 514,406
Minimum to Be Categorized as Well Capitalized Capital, Common equity Tier 1 capital to risk-weighted average | 435,649 | 417,955
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets | $ 385,908 | $ 374,714
Minimum to Be Categorized as Well Capitalized Ratio, Total capital to risk-weighted assets | 0.10 | 0.10
Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to risk-weighted assets | 0.08 | 0.08
Minimum to Be Categorized as Well Capitalized Ratio, Common equity Tier 1 capital to risk-weighted assets | 6.50% | 6.50%
Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to average assets | 0.05 | 0.05

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