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Regulatory Matters - Additional Information (Detail) | Mar. 31, 2023 | Dec. 31, 2022 | 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) | 5.94% | 5.71% | 2.50%
Hanmi Bank |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Minimum ratio of qualifying total capital to risk-weighted assets | 0.0800 | 0.0800 |
Minimum ratio of Tier 1 capital to risk-weighted assets | 0.0600 | 0.0600 |
Leverage ratio | 0.0400 | 0.0400 |
Minimum ratio of qualifying total capital to risk-weighted assets for well capitalized | 0.1000 | 0.1000 |
Minimum ratio of Tier 1 capital to average assets for well capitalized | 0.0800 | 0.0800 |
Capital conservation buffer (percent) | 6.15% | 5.86% |
Depository Institutions |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Leverage ratio | 0.050 |  |

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