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Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail) $ in Thousands | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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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 | 8.0 |
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 6.0 |
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets | 4.0 |
Minimum to Be Categorized as Well Capitalized Ratio, Total capital to risk-weighted assets | 10.0 |
Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to risk-weighted assets | 8.0 |
Hanmi Financial |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual Capital, Total capital to risk-weighted assets | $ 755,929 | $ 743,091
Actual Capital, Tier 1 capital to risk-weighted assets | 596,129 | 583,076
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 575,601 | 562,647
Actual Capital, Tier 1 capital to average assets | $ 596,129 | $ 583,076
Actual Capital Ratio, Total capital to risk-weighted assets | 15.54 | 15.21
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 12.26 | 11.93
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 11.84 | 11.52
Actual Capital Ratio, Tier 1 capital to average assets | 9.61 | 9.49
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 389,082 | $ 390,884
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 291,812 | 293,163
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 218,859 | 219,872
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 248,215 | $ 245,882
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets | 8.00 | 8.00
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 6.00 | 6.00
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 | 4.00 | 4.00
Hanmi Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual Capital, Total capital to risk-weighted assets | $ 743,137 | $ 726,532
Actual Capital, Tier 1 capital to risk-weighted assets | 682,137 | 665,058
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 682,137 | 665,058
Actual Capital, Tier 1 capital to average assets | $ 682,137 | $ 665,059
Actual Capital Ratio, Total capital to risk-weighted assets | 15.26 | 14.86
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 14.01 | 13.60
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 14.01 | 13.60
Actual Capital Ratio, Tier 1 capital to average assets | 10.99 | 10.83
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 389,579 | $ 391,114
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 292,185 | 293,336
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 219,138 | 220,002
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 248,219 | $ 245,736
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets | 8.00 | 8.00
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets | 6.00 | 6.00
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 | 4.00 | 4.00
Minimum to Be Categorized as Well Capitalized Capital, Total capital to risk-weighted assets | $ 486,974 | $ 488,893
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets | 389,579 | 391,114
Minimum to Be Categorized as Well Capitalized Capital, Common equity Tier 1 capital to risk-weighted average | 316,533 | 317,780
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets | $ 310,274 | $ 307,170
Minimum to Be Categorized as Well Capitalized Ratio, Total capital to risk-weighted assets | 10.00 | 10.00
Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to risk-weighted assets | 8.00 | 8.00
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 | 5.00 | 5.00

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