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INVESTMENT SECURITIES - Maturity of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due in one year or less | $ 100 | $ 100
Due after one year through five years | 400 | 500
Due after five years through ten years | 0 | 0
Total securities with contractual maturities | 500 | 600
Mortgage-backed securities | 89,442 | 90,629
Amortized Cost | 89,942 | 91,229
Estimated Fair Value |  |
Due in one year or less | 97 | 100
Due after one year through five years | 369 | 465
Due after five years through ten years | 0 | 0
Total securities with contractual maturities | 466 | 565
Mortgage-backed securities | 69,804 | 72,697
Total held to maturity securities | $ 70,270 | $ 73,262

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