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

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Comments for Assets Measured at Fair Value on Non-Recurring Basis (Detail)

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Comments for Assets Measured at Fair Value on Non-Recurring Basis (Detail) - Significant Unobservable Inputs - Non-recurring Basis $ in Thousands	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 31,049
Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	27,154
Other \| Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 13,926
Alternative Investment, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember
Construction \| Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 13,228
Alternative Investment, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember
Construction \| Real Estate \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	(0.003)
Construction \| Real Estate \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	0.043
Construction \| Real Estate \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	0.021
Commercial lines of credit \| Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 3,895
Alternative Investment, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember
Commercial lines of credit \| Commercial and Industrial \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	(0.008)
Commercial lines of credit \| Commercial and Industrial \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	0.042
Commercial lines of credit \| Commercial and Industrial \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	0.018
Bank-Owned Premises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,900
Alternative Investment, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember
Bank-Owned Premises \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	(0.030)
Bank-Owned Premises \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	0.055
Bank-Owned Premises \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range	(0.002)