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

Investment Securities - Continuous Unrealized Loss Position (Detail)

Investment Securities - Continuous Unrealized Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 Security	Dec. 31, 2012 Security
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	$ 7,459	$ 638
Available-for-Sale Within One Year, Estimated Fair Value	193,127	85,291
Available-for-Sale Within One Year, Number of Securities	80	33
Available-for-Sale More than One Year, Gross Unrealized Loss	4,484	301
Available-for-Sale More than One Year, Estimated Fair Value	73,871	13,655
Available-for-Sale More than One Year, Number of Securities	31	7
Available-for-Sale, Gross Unrealized Loss	11,943	939
Available-for-Sale, Estimated Fair Value	266,998	98,946
Available-for-Sale, Number of Securities	111	40
Mortgage-backed securities [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	1,552	186
Available-for-Sale Within One Year, Estimated Fair Value	64,931	28,354
Available-for-Sale Within One Year, Number of Securities	21	10
Available-for-Sale More than One Year, Gross Unrealized Loss	1,619
Available-for-Sale More than One Year, Estimated Fair Value	22,774
Available-for-Sale More than One Year, Number of Securities	9
Available-for-Sale, Gross Unrealized Loss	3,171	186
Available-for-Sale, Estimated Fair Value	87,705	28,354
Available-for-Sale, Number of Securities	30	10
U.S. government agency securities [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	4,577	94
Available-for-Sale Within One Year, Estimated Fair Value	70,263	26,894
Available-for-Sale Within One Year, Number of Securities	26	9
Available-for-Sale More than One Year, Gross Unrealized Loss	1,393
Available-for-Sale More than One Year, Estimated Fair Value	19,603
Available-for-Sale More than One Year, Number of Securities	7
Available-for-Sale, Gross Unrealized Loss	5,970	94
Available-for-Sale, Estimated Fair Value	89,866	26,894
Available-for-Sale, Number of Securities	33	9
Collateralized Mortgage Obligations [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	500	109
Available-for-Sale Within One Year, Estimated Fair Value	24,478	14,344
Available-for-Sale Within One Year, Number of Securities	12	5
Available-for-Sale More than One Year, Gross Unrealized Loss	354
Available-for-Sale More than One Year, Estimated Fair Value	9,610
Available-for-Sale More than One Year, Number of Securities	4
Available-for-Sale, Gross Unrealized Loss	854	109
Available-for-Sale, Estimated Fair Value	34,088	14,344
Available-for-Sale, Number of Securities	16	5
Municipal bonds-tax exempt [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	13
Available-for-Sale Within One Year, Estimated Fair Value	4,065
Available-for-Sale Within One Year, Number of Securities	2
Available-for-Sale, Gross Unrealized Loss	13
Available-for-Sale, Estimated Fair Value	4,065
Available-for-Sale, Number of Securities	2
Municipal bonds-taxable [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	479	126
Available-for-Sale Within One Year, Estimated Fair Value	19,783	4,587
Available-for-Sale Within One Year, Number of Securities	14	4
Available-for-Sale More than One Year, Gross Unrealized Loss	242	9
Available-for-Sale More than One Year, Estimated Fair Value	3,876	1,964
Available-for-Sale More than One Year, Number of Securities	4	3
Available-for-Sale, Gross Unrealized Loss	721	135
Available-for-Sale, Estimated Fair Value	23,659	6,551
Available-for-Sale, Number of Securities	18	7
Corporate bonds [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	91
Available-for-Sale Within One Year, Estimated Fair Value	4,899
Available-for-Sale Within One Year, Number of Securities	1
Available-for-Sale More than One Year, Gross Unrealized Loss	114	246
Available-for-Sale More than One Year, Estimated Fair Value	6,874	10,738
Available-for-Sale More than One Year, Number of Securities	2	3
Available-for-Sale, Gross Unrealized Loss	205	246
Available-for-Sale, Estimated Fair Value	11,773	10,738
Available-for-Sale, Number of Securities	3	3
SBA loan pool securities [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	229	82
Available-for-Sale Within One Year, Estimated Fair Value	2,714	11,004
Available-for-Sale Within One Year, Number of Securities	1	3
Available-for-Sale More than One Year, Gross Unrealized Loss	676
Available-for-Sale More than One Year, Estimated Fair Value	10,207
Available-for-Sale More than One Year, Number of Securities	3
Available-for-Sale, Gross Unrealized Loss	905	82
Available-for-Sale, Estimated Fair Value	12,921	11,004
Available-for-Sale, Number of Securities	4	3
Other securities [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss	18	1
Available-for-Sale Within One Year, Estimated Fair Value	1,994	12
Available-for-Sale Within One Year, Number of Securities	3	1
Available-for-Sale More than One Year, Gross Unrealized Loss	86	46
Available-for-Sale More than One Year, Estimated Fair Value	927	953
Available-for-Sale More than One Year, Number of Securities	2	1
Available-for-Sale, Gross Unrealized Loss	104	47
Available-for-Sale, Estimated Fair Value	2,921	965
Available-for-Sale, Number of Securities	5	2
Equity securities [Member]
Summary of Investment Holdings [Line Items]
Available-for-Sale Within One Year, Gross Unrealized Loss		40
Available-for-Sale Within One Year, Estimated Fair Value		96
Available-for-Sale Within One Year, Number of Securities		1
Available-for-Sale, Gross Unrealized Loss		40
Available-for-Sale, Estimated Fair Value		$ 96
Available-for-Sale, Number of Securities		1