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

Securities - Summary of Investment Securities Available for Sale (Detail)

Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 729,763	$ 1,061,703
Gross Unrealized Gain	2,832	3,980
Gross Unrealized Loss	3,912	4,966
Estimated Fair Value	728,683	1,060,717
Collateralized mortgage obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	154,968	188,704
Gross Unrealized Gain	1,061	417
Gross Unrealized Loss	660	1,074
Estimated Fair Value	155,369	188,047
Municipal bonds-tax exempt [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,589	4,319
Gross Unrealized Gain	37	71
Gross Unrealized Loss	0	0
Estimated Fair Value	3,626	4,390
Municipal bonds-taxable [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,607	16,615
Gross Unrealized Gain	271	398
Gross Unrealized Loss	46	91
Estimated Fair Value	15,832	16,922
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,019	17,018
Gross Unrealized Gain	1	2
Gross Unrealized Loss	44	72
Estimated Fair Value	16,976	16,948
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	379,574	571,678
Gross Unrealized Gain	1,374	2,811
Gross Unrealized Loss	1,380	1,203
Estimated Fair Value	379,568	573,286
U.S. government agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	63,969	129,857
Gross Unrealized Gain	4	172
Gross Unrealized Loss	1,312	1,822
Estimated Fair Value	62,661	128,207
SBA loan pool securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	71,960	109,983
Gross Unrealized Gain	83	52
Gross Unrealized Loss	357	588
Estimated Fair Value	71,686	109,447
U.S. treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	161	163
Gross Unrealized Gain	1	0
Gross Unrealized Loss	0	0
Estimated Fair Value	162	163
Other securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,916	22,916
Gross Unrealized Gain	0	57
Gross Unrealized Loss	113	80
Estimated Fair Value	$ 22,803	22,893
Equity security [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		450
Gross Unrealized Gain		0
Gross Unrealized Loss		36
Estimated Fair Value		$ 414