Hanmi Financial Corporation Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Borrowings and Subordinated Debentures - Additional Information (Detail)

Borrowings and Subordinated Debentures - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 01, 2026	Jul. 30, 2026	Dec. 31, 2005	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2014
Debt Instrument [Line Items]
Interest expense on borrowings				$ 0	$ 324,000	$ 830,000	$ 3,032,000
Pledged loans, carrying value				2,300,000,000		2,300,000,000		$ 2,400,000,000
Total borrowing capacity available from the collateral				1,700,000,000		1,700,000,000		1,760,000,000
Borrowing capacity reduced by amount in Federal Home Loan Bank letters of credit				180,000,000		180,000,000		150,000,000
Remaining available borrowing capacity				1,520,000,000		1,520,000,000		1,460,000,000
Average balance of FHLB advances						27,747,000		82,390,000
Borrowing capacity through Fed Discount Window				833,500,000		833,500,000		424,500,000
Interest expense on FHLB				0	300,000	800,000	3,000,000
Debt instrument, maturity date	Sep. 01, 2031	Jul. 31, 2036
FHLB of San Francisco
Debt Instrument [Line Items]
Pledged loans, carrying value				1,190,000,000		1,190,000,000		528,100,000
2031 Notes
Debt Instrument [Line Items]
Subordinated debentures issued	$ 110,000,000
Fixed interest rate	3.75%
Debt issuance costs, net								108,700,000
Unamortized debt issuance cost	$ 1,100,000
Debt Issuance Costs, Net								108,700,000
2036 Notes
Debt Instrument [Line Items]
Subordinated debentures issued		$ 55,000,000
Fixed interest rate		6.50%
Debt issuance costs, net		$ 900,000		54,100,000		54,100,000
Debt Issuance Costs, Net		$ 900,000		54,100,000		54,100,000
Subordinated debentures
Debt Instrument [Line Items]
Debt instrument discount				$ 22,000,000		$ 22,000,000		21,700,000
Subordinated debentures \| Central Bancorp, Inc
Debt Instrument [Line Items]
Subordinated debentures issued			$ 26,000,000
Debt instrument, maturity date						Mar. 15, 2036
Fixed interest rate			6.26%	5.56%		5.56%
Debt outstanding, net of issuance cost				$ 22,800,000		$ 22,800,000		22,500,000
Unpaid principal balance									$ 26,800,000
Estimated fair value									18,500,000
Debt instrument discount				4,000,000		$ 4,000,000		$ 4,300,000	$ 8,300,000
Frequency of interest payment						quarterly
Term for the initial fixed interest rate						5 years
Optional interest payment deferral period (not to exceed)						5 years
Variable interest rate basis						three-month LIBOR plus 140 basis points
Amortization of subordinated debentures				108,000,000	$ 104,000,000	$ 316,000,000	$ 328,000,000
TPS
Debt Instrument [Line Items]
Investments				$ 800,000		$ 800,000
Benchmark Rate \| 2031 Notes
Debt Instrument [Line Items]
Basis spread	3.10%
Benchmark Rate \| 2036 Notes
Debt Instrument [Line Items]
Basis spread		2.34%
3-month London Interbank Offered Rate (LIBOR) \| Subordinated debentures \| Central Bancorp, Inc
Debt Instrument [Line Items]
Basis spread			1.40%
Three Month Secured Overnight Financing Rate (SOFR ) \| Subordinated debentures \| Central Bancorp, Inc
Debt Instrument [Line Items]
Basis spread						1.66%
Three Month Secured Overnight Financing Rate (SOFR ) \| Credit Spread \| Subordinated debentures \| Central Bancorp, Inc
Debt Instrument [Line Items]
Basis spread						1.40%
Three Month Secured Overnight Financing Rate (SOFR ) \| Adjustment to Convert 3-month LIBOR to 3-month SOFR \| Subordinated debentures \| Central Bancorp, Inc
Debt Instrument [Line Items]
Basis spread						0.26%