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INVESTMENT SECURITIES - Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) security | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |
Gain on investments | $ 145 |  |
Loss adjustment on equity securities |  | $ (40) |
Number of investment securities | security | 14 |  |
Investment securities | $ 407,690 |  | $ 466,465
Proceeds from sale of investment securities | 75,736 | 0 |
Debt Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investment securities | 75,600 |  |
Proceeds from sale of investment securities | 75,700 | $ 0 |
Collateral Pledged |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investment securities pledged to secure public funds, fair value | $ 301,600 |  | $ 398,700

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