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, 2017
Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets 8.00%  
Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets 6.00%  
Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets 4.00%  
Minimum to Be Categorized as Well Capitalized Percentage, Total capital to risk-weighted assets 10.00%  
Minimum to Be Categorized as Well Capitalized Percentage, Tier 1 capital to risk-weighted assets 8.00%  
Hanmi Financial [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Actual Capital, Total capital to risk-weighted assets $ 684,272 $ 554,089
Actual Capital, Tier 1 capital to risk-weighted assets 553,970 520,477
Actual Capital, Common equity Tier 1 capital to risk-weighted assets 537,950 509,239
Actual Capital, Tier 1 capital to average assets $ 553,970 $ 520,477
Actual Capital Percentage, Total capital to risk-weighted assets 15.50% 13.86%
Actual Capital Percentage, Tier 1 capital to risk-weighted assets 12.55% 13.02%
Actual Capital Percentage, Common equity Tier 1 capital to risk-weighted assets 12.19% 12.73%
Actual Capital Percentage, Tier 1 capital to average assets 10.79% 11.53%
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets $ 353,171 $ 319,901
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets 264,878 239,926
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets 198,658 179,944
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets $ 205,344 $ 180,581
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 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Actual Capital, Total capital to risk-weighted assets $ 670,896 $ 544,759
Actual Capital, Tier 1 capital to risk-weighted assets 638,557 511,146
Actual Capital, Common equity Tier 1 capital to risk-weighted assets 638,557 511,146
Actual Capital, Tier 1 capital to average assets $ 638,557 $ 511,146
Actual Capital Percentage, Total capital to risk-weighted assets 15.20% 13.64%
Actual Capital Percentage, Tier 1 capital to risk-weighted assets 14.47% 12.80%
Actual Capital Percentage, Common equity Tier 1 capital to risk-weighted assets 14.47% 12.80%
Actual Capital Percentage, Tier 1 capital to average assets 12.44% 11.33%
Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets $ 353,091 $ 319,520
Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets 264,818 239,640
Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets 198,614 179,730
Minimum Regulatory Requirement Capital, Tier 1 capital to average assets $ 205,385 $ 180,411
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 $ 441,364 $ 399,399
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets 353,091 319,520
Minimum to Be Categorized as Well Capitalized Capital,. Common equity Tier 1 capital to risk-weighted average 286,886 259,610
Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets $ 256,731 $ 225,514
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%