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INVESTMENT SECURITIES - Investments classified by contractual maturity date (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-Sale - Amortized Cost |  |
After one through two years | $ 245 |
After two through three years | 994 |
After five through fifteen years | 13,857 |
After fifteen years | 41,882 |
Securities not due on a single maturity date | 530,004 |
Available-for-sale securities, Amortized Cost, Total | 586,982 | $ 594,564
Available-for-Sale - Fair Value |  |
After one through two years | 245 |
After two through three years | 998 |
After five through fifteen years | 13,198 |
After fifteen years | 38,307 |
Securities not due on a single maturity date | 483,166 |
Available-for-Sale, Fair Value, Total | 535,914 | 533,373
Held-to-Maturity - Amortized Carrying Value |  |
After five through fifteen years | 5,633 |
After fifteen years | 509 |
Securities not due on a single maturity date | 179,711 |
Held-to-Maturity, Amortized Carrying Value, Total | 185,853 | 187,433
Held-to-Maturity - Fair Value |  |
After five through fifteen years | 5,015 |
After fifteen years | 415 |
Securities not due on a single maturity date | 159,784 |
Held-to-maturity, Fair Value, Total | $ 165,214 | $ 162,765

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