Annual report pursuant to Section 13 and 15(d)

Liquidity - Additional Information (Detail)

v3.10.0.1
Liquidity - Additional Information (Detail) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2014
Dec. 31, 2012
Line of Credit Facility [Line Items]        
Percentage of borrowings from FHLB (up to) 2.56%      
Total borrowing capacity based on pledged collateral $ 924,400,000      
Borrowing capacity available based on pledged collateral 729,400,000      
Bank's FHLB borrowings 55,000,000 $ 150,000,000    
Borrowings 0      
Line of credit     $ 115,000,000  
Hanmi Bank        
Line of Credit Facility [Line Items]        
Cash on deposit with bank subsidiary 7,500,000      
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 55,000,000      
Broker deposits $ 351,300,000      
Percentage of borrowings from FHLB (up to) 30.00%      
Total borrowing capacity based on pledged collateral $ 924,400,000 802,900,000    
Borrowing capacity available based on pledged collateral 729,400,000 652,900,000    
Bank's FHLB borrowings 55,000,000 $ 150,000,000    
Amount available from borrowing source 29,300,000      
Carrying value for loans pledged by Bank 29,900,000      
Borrowings $ 0      
Maximum borrowing capacity of line of credit       $ 100,000,000