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

Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 941,007	$ 922,654
Gross Unrealized Gain	9	177
Gross Unrealized Loss	(64,036)	(12,041)
Estimated Fair Value	876,980	910,790
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,953	15,457
Gross Unrealized Gain		1
Gross Unrealized Loss	(739)	(61)
Estimated Fair Value	18,214	15,397
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	618,459	615,393
Gross Unrealized Gain	5	18
Gross Unrealized Loss	(41,588)	(7,906)
Estimated Fair Value	576,876	607,505
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	93,324	95,153
Gross Unrealized Gain	4	41
Gross Unrealized Loss	(6,164)	(1,590)
Estimated Fair Value	87,164	93,604
Debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	131,370	117,499
Gross Unrealized Loss	(6,746)	(1,603)
Estimated Fair Value	124,624	115,896
Total U.S. government agency and sponsored agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	843,153	828,045
Gross Unrealized Gain	9	59
Gross Unrealized Loss	(54,498)	(11,099)
Estimated Fair Value	788,664	817,005
Municipal bonds-tax exempt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,901	79,152
Gross Unrealized Gain		117
Gross Unrealized Loss	(8,799)	(881)
Estimated Fair Value	$ 70,102	$ 78,388