Hanmi Financial Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Acquisition - Additional Information (Detail)

Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
Acquisition - Additional Information (Detail) (USD $)	Aug. 31, 2014	Sep. 30, 2014	Dec. 31, 2014 Branches	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2014
Loans At Acquisition Date [Line Items]
Number of branch locations			49hafc_NumberOfBranchLocations
Bargain purchase gain, net of deferred taxes		$ 14,600,000	$ 14,577,000
Merger and integration expense			6,646,000	730,000
Core deposit intangible	2,200,000					2,200,000
Core deposit intangible, useful life	10 years
Amortization expense of core deposit intangible			133,000us-gaap_AmortizationOfIntangibleAssets		34,000us-gaap_AmortizationOfIntangibleAssets
Certificates of deposit	11,300,000					11,300,000
Amortization of certificates of deposit			2,300,000us-gaap_AccretionExpense
Discount on subordinated debentures	8,300,000					8,300,000
Amortization of subordinated debentures			71,000
Effect of Change in Accounting Principle [Member]
Loans At Acquisition Date [Line Items]
Bargain purchase gain, net of deferred taxes	8,000,000	8,000,000
Central Bancorp, Inc [Member]
Loans At Acquisition Date [Line Items]
Consideration paid for redemption of preferred stock	28,675,000
Common stock, price per share after acquisition	$ 17.64					$ 17.64
Consideration paid	50,000,000
Total assets acquired	1,267,921,000					1,267,921,000
Total liabilities assumed	1,174,669,000					1,174,669,000
Total identifiable net assets	93,252,000					93,252,000
Loans	297,272,000					297,272,000
Total deposits	1,098,997,000					1,098,997,000
Number of branch locations			23
Bargain purchase gain, net of deferred taxes	14,577,000
Merger and integration expense			6,600,000
Core deposit intangible	2,213,000					2,213,000
Central Bancorp, Inc [Member] \| Effect of Change in Accounting Principle [Member]
Loans At Acquisition Date [Line Items]
Total assets acquired	11,992,000					11,992,000
Total liabilities assumed	5,574,000					5,574,000
Total identifiable net assets	6,418,000					6,418,000
Loans	3,240,000					3,240,000
Bargain purchase gain, net of deferred taxes	$ 7,984,000