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	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 667,403	$ 1,061,703
Gross Unrealized Gain	3,741	3,980
Gross Unrealized Loss	1,804	4,966
Estimated Fair Value	669,340	1,060,717
Collateralized mortgage obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	116,145	188,704
Gross Unrealized Gain	544	417
Gross Unrealized Loss	375	1,074
Estimated Fair Value	116,314	188,047
Municipal bonds-tax exempt [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47,737	4,319
Gross Unrealized Gain	304	71
Gross Unrealized Loss	40	0
Estimated Fair Value	48,001	4,390
Municipal bonds-taxable [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,975	16,615
Gross Unrealized Gain	397	398
Gross Unrealized Loss	0	91
Estimated Fair Value	14,372	16,922
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,019	17,018
Gross Unrealized Gain	0	2
Gross Unrealized Loss	14	72
Estimated Fair Value	17,005	16,948
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	323,046	571,678
Gross Unrealized Gain	2,233	2,811
Gross Unrealized Loss	775	1,203
Estimated Fair Value	324,504	573,286
U.S. government agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	57,971	129,857
Gross Unrealized Gain	14	172
Gross Unrealized Loss	311	1,822
Estimated Fair Value	57,674	128,207
SBA loan pool securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	68,434	109,983
Gross Unrealized Gain	68	52
Gross Unrealized Loss	201	588
Estimated Fair Value	68,301	109,447
U.S. treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	160	163
Gross Unrealized Gain	2	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	179	57
Gross Unrealized Loss	88	80
Estimated Fair Value	$ 23,007	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