Quarterly report [Sections 13 or 15(d)]

Liquidity - Additional Information (Detail)

v3.26.3
Liquidity - Additional Information (Detail) - USD ($)
Sep. 30, 2026
Dec. 31, 2025
Line of Credit Facility [Line Items]    
Total borrowing capacity based on pledged collateral $ 1,520,000,000 $ 1,460,000,000
Amount available from borrowing source 833,500,000 424,500,000
Borrowings 0 0
Line of credit   140,000,000
State of California time deposits 2,632,139,000 2,503,421,000
Hanmi Bank    
Line of Credit Facility [Line Items]    
Cash on deposit with bank subsidiary 4,400,000 8,800,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances   150,000,000
Broker deposits $ 86,900,000 88,500,000
Percentage of borrowings from FHLB (up to) 30.00%  
Total borrowing capacity based on pledged collateral $ 1,700,000,000 1,760,000,000
Borrowing capacity available based on pledged collateral 1,520,000,000 1,460,000,000
Amount available from borrowing source 833,500,000 424,500,000
Carrying value for loans pledged by Bank 1,190,000,000 528,100,000
Borrowings 0 0
Maximum borrowing capacity of line of credit   100,000,000
State of California time deposits 181,300,000 150,800,000
U.S. Treasury securities | Hanmi Bank    
Line of Credit Facility [Line Items]    
Debt securities fair value $ 4,000,000 $ 46,200,000