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

Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 955,318	$ 922,654
Gross Unrealized Gain	66	177
Gross Unrealized Loss	(95,163)	(12,041)
Estimated Fair Value	860,221	910,790
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,948	15,457
Gross Unrealized Gain		1
Gross Unrealized Loss	(1,009)	(61)
Estimated Fair Value	22,939	15,397
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	617,020	615,393
Gross Unrealized Gain	66	18
Gross Unrealized Loss	(63,330)	(7,906)
Estimated Fair Value	553,756	607,505
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	99,314	95,153
Gross Unrealized Gain		41
Gross Unrealized Loss	(8,584)	(1,590)
Estimated Fair Value	90,730	93,604
Debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	136,387	117,499
Gross Unrealized Loss	(8,553)	(1,603)
Estimated Fair Value	127,834	115,896
Total U.S. government agency and sponsored agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	852,721	828,045
Gross Unrealized Gain	66	59
Gross Unrealized Loss	(80,467)	(11,099)
Estimated Fair Value	772,320	817,005
Municipal bonds-tax exempt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,649	79,152
Gross Unrealized Gain		117
Gross Unrealized Loss	(13,687)	(881)
Estimated Fair Value	$ 64,962	$ 78,388