Hanmi Financial Corporation Quarterly report pursuant to Section 13 or 15(d)

Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 967,383	$ 922,654
Gross Unrealized Gain	0	177
Gross Unrealized Loss	(137,232)	(12,041)
Estimated Fair Value	830,151	910,790
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	34,876	15,457
Gross Unrealized Gain		1
Gross Unrealized Loss	(1,716)	(61)
Estimated Fair Value	33,160	15,397
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	615,335	615,393
Gross Unrealized Gain		18
Gross Unrealized Loss	(92,965)	(7,906)
Estimated Fair Value	522,370	607,505
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	98,872	95,153
Gross Unrealized Gain		41
Gross Unrealized Loss	(12,466)	(1,590)
Estimated Fair Value	86,406	93,604
Debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	139,904	117,499
Gross Unrealized Loss	(12,270)	(1,603)
Estimated Fair Value	127,634	115,896
Total U.S. government agency and sponsored agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	854,111	828,045
Gross Unrealized Gain	0	59
Gross Unrealized Loss	(117,701)	(11,099)
Estimated Fair Value	736,410	817,005
Municipal bonds-tax exempt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,396	79,152
Gross Unrealized Gain		117
Gross Unrealized Loss	(17,815)	(881)
Estimated Fair Value	$ 60,581	$ 78,388