Annual report pursuant to Section 13 and 15(d)

Regulatory Matters - Additional Information (Detail)

v3.8.0.1
Regulatory Matters - Additional Information (Detail)
Dec. 31, 2017
Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum ratio of qualifying total capital to risk-weighted assets 8.00%  
Minimum ratio of Tier 1 capital to risk-weighted assets 6.00%  
Leverage ratio 4.00%  
Minimum ratio of qualifying total capital to risk-weighted assets for well capitalized 10.00%  
Minimum ratio of Tier 1 capital to average assets for well capitalized 8.00%  
Bank's capital conservation buffer (percent) 6.55% 5.64%
Depository Institutions [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Leverage ratio 5.00%  
Hanmi Bank [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Bank's capital conservation buffer (percent) 7.20% 5.86%