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Regulatory Matters - Additional Information (Detail) | Sep. 30, 2025 | Dec. 31, 2024 | Jan. 01, 2019
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Minimum ratio of qualifying total capital to risk-weighted assets | 0.080 |  |
Minimum ratio of Tier 1 capital to risk-weighted assets | 0.060 |  |
Leverage ratio | 0.040 |  |
Minimum ratio of qualifying total capital to risk-weighted assets for well capitalized | 0.100 |  |
Minimum ratio of Tier 1 capital to average assets for well capitalized | 0.080 |  |
Capital conservation buffer (percent) | 6.33% | 6.46% | 2.50%
Hanmi Bank |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Minimum ratio of qualifying total capital to risk-weighted assets | 0.08 | 0.08 |
Minimum ratio of Tier 1 capital to risk-weighted assets | 0.06 | 0.06 |
Leverage ratio | 0.04 | 0.04 |
Minimum ratio of qualifying total capital to risk-weighted assets for well capitalized | 0.10 | 0.10 |
Minimum ratio of Tier 1 capital to average assets for well capitalized | 0.08 | 0.08 |
Capital conservation buffer (percent) | 6.28% | 6.43% |
Depository Institutions |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Leverage ratio | 0.050 |  |

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