Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail) $ in Thousands	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets	0.08
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets	0.06
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets	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	$ 1,041,195	$ 1,020,898
Actual Capital, Tier 1 capital to risk-weighted assets	858,231	838,150
Actual Capital, Common equity Tier 1 capital to risk-weighted assets	836,297	816,424
Actual Capital, Tier 1 capital to average assets	$ 858,231	$ 838,150
Actual Capital Ratio, Total capital to risk-weighted assets	0.1529	0.1506
Actual Capital Ratio, Tier 1 capital to risk-weighted assets	0.1261	0.1237
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets	0.1228	0.1205
Actual Capital Ratio, Tier 1 capital to average assets	0.1094	0.107
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets	$ 544,652	$ 542,150
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets	408,489	406,612
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets	306,367	304,959
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets	$ 313,741	$ 313,270
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	$ 958,599	$ 965,543
Actual Capital, Tier 1 capital to risk-weighted assets	912,635	892,795
Actual Capital, Common equity Tier 1 capital to risk-weighted assets	912,635	892,795
Actual Capital, Tier 1 capital to average assets	$ 912,635	$ 892,795
Actual Capital Ratio, Total capital to risk-weighted assets	0.1448	0.1425
Actual Capital Ratio, Tier 1 capital to risk-weighted assets	0.134	0.1317
Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets	0.134	0.1317
Actual Capital Ratio, Tier 1 capital to average assets	0.1171	0.1147
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets	$ 544,687	$ 542,197
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets	408,515	406,648
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets	306,386	304,986
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets	$ 311,803	$ 311,425
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	$ 680,858	$ 677,747
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets	544,687	542,197
Minimum to Be Categorized as Well Capitalized Capital, Common equity Tier 1 capital to risk-weighted average	442,558	440,535
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets	$ 389,754	$ 389,281
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

Tier One Common Capital Required for Capital Adequacy to Risk Weighted Assets

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Tier One Common Capital Required to be Well Capitalized to Risk Weighted Assets

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Amount of total capital as defined by regulatory framework.

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Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework.

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Amount of Common Equity Tier 1 risk-based capital as defined by regulatory framework.

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Amount of Tier 1 leverage capital as defined by regulatory framework.

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