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INVESTMENT SECURITIES - Narrative (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) security contract | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |
Cumulative OTTI |  | $ 0 | $ 0
Gain (loss) on investments | $ (47,000) | 10,000 |
Investment securities | 513,519,000 | 513,728,000 |
Collateral Pledged |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investment securities pledged to secure public funds | 439,700,000 | 396,800,000 |
Equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Gain (loss) on investments |  |  | $ 638,000
US Treasury Securities Sold |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investment securities | $ 19,900,000 |  |
Number of investments securities sold | security | 3 |  |
US States and Political Subdivisions Debt Securities Sold |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Gain (loss) on investments | $ (44,000) |  |
Investment securities | $ 2,200,000 |  |
Number of investments securities sold | contract | 6 |  |
Investment securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Gain (loss) on investments |  | 32,000 |
Investment securities |  | $ 31,300,000 |
Number of investments securities sold | security |  | 19 |
Non-agency CMOs |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Gain (loss) on investments |  | $ 171,000 |
Investment securities | $ 44,669,000 | 39,758,000 |
States and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investment securities | $ 203,122,000 | $ 197,414,000 |

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