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

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Non-recurring Basis - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	$ 46,106	$ 31,049
Other real estate owned	1,052	63
Bank-owned premises	1,824	1,900
Quoted Prices in Active Markets for Identical Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Other real estate owned	0	0
Bank-owned premises	0	0
Significant Observable Inputs with No Active Market with Identical Characteristics
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Other real estate owned	0	0
Bank-owned premises	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	46,106	31,049
Other real estate owned	1,052	63
Bank-owned premises	$ 1,824	$ 1,900