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

Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Total undisbursed loan commitments	$ 327,403		$ 327,403		$ 330,871
Allowance for Loan Off-Balance Sheet Items [Roll Forward]
Balance at beginning of period			32,429
Loan and lease loss provision (income)	269	$ (1,450)	611	$ (4,490)
Balance at end of period	32,492		32,492
Non-PCI Loans and Leases [Member]
Allowance for Loan Off-Balance Sheet Items [Roll Forward]
Balance at beginning of period	33,038	34,259	31,458	37,494
Loan and lease loss provision (income)	194	(1,540)	787	(4,724)
Balance at end of period	31,698	33,439	31,698	33,439
Allowance for off-balance sheet items [Member] \| Non-PCI Loans and Leases [Member]
Allowance for Loan Off-Balance Sheet Items [Roll Forward]
Balance at beginning of period	1,135	1,475	1,184	986
Loan and lease loss provision (income)	(220)	16	(269)	505
Balance at end of period	915	$ 1,491	915	$ 1,491
Commitments to extend credit [Member]
Loss Contingencies [Line Items]
Total undisbursed loan commitments	301,049		301,049		310,987
Standby letters of credit [Member]
Loss Contingencies [Line Items]
Total undisbursed loan commitments	19,521		19,521		15,669
Commercial letters of credit [Member]
Loss Contingencies [Line Items]
Total undisbursed loan commitments	$ 6,833		$ 6,833		$ 4,215