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Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail) $ in Thousands | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
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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 | 0.04
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 | $ 933,916 | $ 901,239
Actual Capital, Tier 1 capital to risk-weighted assets | 761,969 | 728,344
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 740,411 | 707,101
Actual Capital, Tier 1 capital to average assets | $ 761,969 | $ 728,344
Actual Capital Ratio, Total capital to risk-weighted assets | 0.1507 | 0.1449
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 0.123 | 0.1171
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 0.1195 | 0.1137
Actual Capital Ratio, Tier 1 capital to average assets | 0.1027 | 0.1007
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 495,714 | $ 497,508
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 371,786 | 373,131
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 278,839 | 279,848
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 296,662 | $ 289,311
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 |
Hanmi Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual Capital, Total capital to risk-weighted assets | $ 893,375 | $ 860,503
Actual Capital, Tier 1 capital to risk-weighted assets | 831,428 | 797,608
Actual Capital, Common equity Tier 1 capital to risk-weighted assets | 831,428 | 797,608
Actual Capital, Tier 1 capital to average assets | $ 831,428 | $ 797,608
Actual Capital Ratio, Total capital to risk-weighted assets | 0.1442 | 0.1386
Actual Capital Ratio, Tier 1 capital to risk-weighted assets | 0.1342 | 0.1285
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets | 0.1342 | 0.1285
Actual Capital Ratio, Tier 1 capital to average assets | 0.1125 | 0.1107
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets | $ 495,685 | $ 496,607
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets | 371,764 | 372,455
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets | 278,823 | 279,341
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets | $ 295,515 | $ 288,110
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 |
Minimum to Be Categorized as Well Capitalized Capital, Total capital to risk-weighted assets | $ 619,607 | $ 620,758
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets | 495,685 | 496,607
Minimum to Be Categorized as Well Capitalized Capital, Common equity Tier 1 capital to risk-weighted average | 402,744 | 403,493
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets | $ 369,394 | $ 360,137
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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