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INVESTMENT SECURITIES - Narrative (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) security | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 28 |  |  |
Allowance for credit loss | $ 73 | $ 69 | $ 82 | $ 75
Unrealized losses | 50,082 | 44,736 |  |
Expected credit losses | 0 |  |  |
Debt securities, held-to-maturity, allowance for credit loss | $ 0 | 0 |  |
Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in portfolio | security | 409 |  |  |
Number of securities in unrealized loss position | security | 400 |  |  |
Number of securities in portfolio | security | 30 |  |  |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 309 |  |  |
Number of securities in unrealized loss position | security | 21 |  |  |
SBA pool securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 33 |  |  |
Allowance for credit loss | $ 0 | 0 |  |
Unrealized losses | $ 1,737 | 1,519 |  |
State, county and municipal securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 24 |  |  |
Number of securities in unrealized loss position | security | 7 |  |  |
Allowance for credit loss | $ 0 | 0 |  |
Unrealized losses | $ 1,137 | 944 |  |
Corporate debt securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 7 |  |  |
Allowance for credit loss | $ 73 | 69 |  |
Unrealized losses | $ 859 | 850 |  |
U.S. government-sponsored agencies |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 1 |  |  |
Allowance for credit loss | $ 0 | 0 |  |
Unrealized losses | $ 40 | 38 |  |
U.S. Treasuries |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities in unrealized loss position | security | 26 |  |  |
Allowance for credit loss | $ 0 | 0 |  |
Unrealized losses | 11,697 | 11,793 |  |
Collateral Pledged |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Pledged securities, carrying value | $ 459,400 | $ 532,600 |  |

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