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FAIR VALUES OF FINANCIAL INSTRUMENTS - Gains and (Losses) on Non-Recurring Assets (Details) - Nonrecurring - Collateral dependent loans: - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Single family residential mortgage |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) recognized on assets measured at fair value | $ 0 | $ (191) | $ (211) | $ (169)
Commercial and industrial |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) recognized on assets measured at fair value | 0 | (2,285) | 38 | (9,707)
SBA |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) recognized on assets measured at fair value | (1,377) | (533) | (1,886) | (1,722)
Commercial real estate |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Gains (losses) recognized on assets measured at fair value | $ 2 | $ 0 | $ (138) | $ 0

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