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INVESTMENT SECURITIES - Investments classified by contractual maturity date (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-Sale - Amortized Cost |  |
After two through three years | $ 245 |
After three through four years | 969 |
After five through fifteen years | 10,689 |
After fifteen years | 46,973 |
Securities not due on a single maturity date | 552,897 |
Available-for-sale securities, Amortized Cost, Total | 611,773 | $ 531,892
Available-for-Sale - Fair Value |  |
After two through three years | 245 |
After three through four years | 969 |
After five through fifteen years | 10,448 |
After fifteen years | 44,991 |
Securities not due on a single maturity date | 492,431 |
Available-for-sale securities, Fair Value, Total | 549,084 | 478,207
Held-to-Maturity - Amortized Carrying Value |  |
After five through fifteen years | 3,246 |
After fifteen years | 2,924 |
Securities not due on a single maturity date | 185,054 |
Held-to-Maturity, Amortized Carrying Value, Total | 191,224 | 195,023
Held-to-Maturity - Fair Value |  |
After five through fifteen years | 2,889 |
After fifteen years | 2,613 |
Securities not due on a single maturity date | 159,663 |
Held-to-maturity, Fair Value, Total | $ 165,165 | $ 171,193

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