Annual report pursuant to Section 13 and 15(d)

Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail)

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Regulatory Matters - Capital Ratios of Hanmi Financial and Bank (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets 800.00%  
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets 600.00%  
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets 400.00%  
Minimum to Be Categorized as Well Capitalized Percentage, Total capital to risk-weighted assets 1000.00%  
Minimum to Be Categorized as Well Capitalized Percentage, Tier 1 capital to risk-weighted assets 800.00%  
Hanmi Financial    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Actual Capital, Total capital to risk-weighted assets $ 682,398 $ 684,272
Actual Capital, Tier 1 capital to risk-weighted assets 550,839 553,970
Actual Capital, Common equity Tier 1 capital to risk-weighted assets 531,177 537,950
Actual Capital, Tier 1 capital to average assets $ 550,839 $ 553,970
Actual Capital Percentage, Total capital to risk-weighted assets 14.54% 15.50%
Actual Capital Percentage, Tier 1 capital to risk-weighted assets 11.74% 12.55%
Actual Capital Percentage, Common equity Tier 1 capital to risk-weighted assets 11.32% 12.19%
Actual Capital Percentage, Tier 1 capital to average assets 10.18% 10.79%
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets $ 375,449 $ 353,171
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets 281,587 264,878
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets 211,190 198,658
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets $ 216,526 $ 205,344
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 $ 664,195 $ 670,896
Actual Capital, Tier 1 capital to risk-weighted assets 630,782 638,557
Actual Capital, Common equity Tier 1 capital to risk-weighted assets 630,782 638,557
Actual Capital, Tier 1 capital to average assets $ 630,782 $ 638,557
Actual Capital Percentage, Total capital to risk-weighted assets 14.19% 15.20%
Actual Capital Percentage, Tier 1 capital to risk-weighted assets 13.47% 14.47%
Actual Capital Percentage, Common equity Tier 1 capital to risk-weighted assets 13.47% 14.47%
Actual Capital Percentage, Tier 1 capital to average assets 11.67% 12.44%
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets $ 374,538 $ 353,091
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets 280,904 264,818
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets 210,678 198,614
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets $ 216,265 $ 205,385
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 $ 468,173 $ 441,364
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets 374,538 353,091
Minimum to Be Categorized as Well Capitalized Capital,. Common equity Tier 1 capital to risk-weighted average 304,312 286,886
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets $ 270,331 $ 256,731
Minimum to Be Categorized as Well Capitalized Percentage, Total capital to risk-weighted assets 10.00% 10.00%
Minimum to Be Categorized as Well Capitalized Percentage, Tier 1 capital to risk-weighted assets 8.00% 8.00%
Minimum to Be Categorized as Well Capitalized Percentage, Common equity Tier 1 capital to risk-weighted assets 6.50% 6.50%
Minimum to Be Categorized as Well Capitalized Percentage, Tier 1 capital to average assets 5.00% 5.00%