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INVESTMENT SECURITIES AVAILABLE FOR SALE - Additional Information (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items] |  |  |
Investment with fair value classified as equity security | $ 14,852,000 |  | $ 15,117,000
Securities (losses)/gains, net | (265,000) | $ 198,000 |
CRA Investment Fund [Member] |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |
Investment with fair value classified as equity security | 14,900,000 |  |
Securities (losses)/gains, net | $ (265,000) |  |

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